JP2001088586A - Hybrid vehicle control device - Google Patents

Abstract

(57) Abstract: In a hybrid vehicle including a heat engine and an electric motor as power sources, a hybrid vehicle control device capable of more effectively reducing the influence of a decrease in output of the electric motor is provided. A hybrid vehicle includes an automatic transmission (12, 1).
As a power source for generating power transmitted to the drive wheels 16 through a power transmission system such as 3, an engine 10 that generates power by burning fuel and a power source based on power supply from a fuel cell 20 are generated. And an electric motor 12. When a specific control mode requiring high torque is selected, torque assist by the electric motor 12 is increased. When occurrence of a situation that causes a decrease in the output of the electric motor 12 is detected, a restriction mode of a specific control mode is switched according to each of the detected situations, and appropriate measures are taken according to the situation at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hybrid vehicle having a heat engine and an electric motor as power sources.

[0002]

2. Description of the Related Art Conventionally, a so-called parallel type hybrid vehicle having two power sources, an engine (heat engine) that generates power by burning fuel and an electric motor that generates power by electric energy, has been put into practical use. I have. In such a parallel-type hybrid vehicle, two power sources having different characteristics are appropriately combined in accordance with the running conditions of the vehicle, so that the advantages of each power source are used to compensate for the disadvantages. Therefore, it is possible to significantly improve the fuel consumption rate and the emission performance while sufficiently securing the power performance of the vehicle.

[0003] As described above, as a hybrid vehicle that travels by appropriately combining two power sources in accordance with traveling conditions, as described in Japanese Patent Application Laid-Open No. 10-37776, for example, power generation using an engine output or the like is used. There is known a hybrid vehicle having a configuration in which a secondary battery that stores stored power is used as a power supply device that supplies power to an electric motor. In such a hybrid vehicle, when the amount of power stored in the secondary battery decreases, electric power cannot be sufficiently supplied to the electric motor, and the output of the electric motor cannot be obtained.

Therefore, in the control device for a hybrid vehicle described in the above publication, the engine,
The control contents of the electric motor, the transmission, the power supply device, and the like are appropriately changed. Specifically, in the control device for a hybrid vehicle, when the charged amount of the secondary battery becomes equal to or less than a predetermined value, the engine output is increased and the output of the electric motor is reduced or stopped, and the engine output of the combination of the power sources is reduced. The ratio is increasing. Further, in the control device of the hybrid vehicle, when the control content is changed based on the charged amount of the secondary battery, the degree of dependence on the engine output is increased by an amount corresponding to a reduction in the degree of dependence on the electric motor output required for traveling of the vehicle. Thus, a constant driving force characteristic is always obtained.

[0005] That is, in the control apparatus for a hybrid vehicle disclosed in the above-mentioned publication, the control content is reduced in advance to reduce the degree of dependence on the electric motor output for running the vehicle on condition that the amount of charge of the secondary battery is equal to or less than a predetermined value. , The effect of the decrease in the output of the electric motor on the driving force characteristics of the vehicle is reduced.

[0006]

As described above, if the control contents of the engine, the electric motor, the power supply device, the transmission, and the like are changed as described above based on the storage amount of the secondary battery, the control of the secondary battery can be achieved. Despite the decrease in the output of the electric motor due to the shortage of the charged amount, it is possible to suppress the decrease in the driving force characteristics of the vehicle to some extent.

[0007] However, in such a hybrid vehicle, various situations can be considered as a situation that causes a decrease in the output of the electric motor, in addition to the shortage of the storage amount of the secondary battery, and a situation that causes a decrease in the storage amount of the secondary battery. Various situations can be considered. And, depending on the situation,
There may be differences in the degree of output reduction of the electric motor, the time allowance from the detection of the situation to the occurrence of output reduction, and the like, and the effect on the vehicle running may differ greatly. For this reason, as described in the above-mentioned publication, simply changing the above-described control contents uniformly on the condition that the charged amount of the secondary battery is equal to or less than a predetermined value does not always make it possible to always appropriately cope with the output reduction of the electric motor. Absent.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hybrid vehicle having a heat engine and an electric motor as power sources, which can more effectively reduce the influence of a decrease in the output of the electric motor. It is an object of the present invention to provide a hybrid vehicle control device capable of reducing the number of vehicles.

[0009]

The means for achieving the above object and the effects thereof will be described below. According to a first aspect of the present invention, there are provided two power sources, a heat engine and an electric motor, a power transmission system for transmitting the output of these power sources to driving wheels, and supplying power to the electric motor. A control unit for a hybrid vehicle including a power supply device that performs detection, a detection unit that detects occurrence of a situation that causes a decrease in output of the electric motor, the heat engine, the electric motor,
Changing means for changing the control content of at least one of a power transmission system and a power supply device in response to detection of the occurrence of the situation by the detecting means; and changing the control content of the control content by the changing means. And a change mode switching means for switching according to a situation in which the occurrence is detected by the means.

In the case of a hybrid vehicle that travels using the outputs of two heat sources, a heat engine and an electric motor, when the output of the electric motor is reduced, the required power is secured by, for example, changing the power distribution of the two power sources. In addition, it is necessary to appropriately change the control contents of the two power sources and the power transmission system so as to mitigate the effect of the decrease in the output of the electric motor on the vehicle running. However, there are various situations in which the output of the electric motor is reduced, such as insufficient power supply capacity of the power supply device, exceeding the appropriate temperature range of the power supply device, insufficient warm-up of the power supply device, and abnormality of the power supply system. The time margin until the output of the electric motor becomes insufficient, the degree of output decrease, and the like are different depending on each situation, and the effects on the vehicle running are also different.

Therefore, in the configuration according to the first aspect,
When the detection means detects the occurrence of a situation that causes a decrease in the output of the electric motor, the changing means detects the heat engine,
The control content of at least one of the electric motor, the power transmission system, and the power supply device is changed. Moreover, in this configuration, the change mode of the control content is switched by the change mode switching means according to the situation where the occurrence is detected at that time. In this way, by taking appropriate measures according to the situation in which the occurrence has been detected, it is possible to preferably avoid or mitigate the influence of a decrease in the output of the electric motor such as a decrease in the driving performance of the vehicle, for example.

Therefore, according to the configuration of the first aspect, it is possible to take appropriate measures according to the detected situations, even if the influences on the vehicle running are different. As a result, the effect of lowering the output of the electric motor can be more effectively reduced.

[0013] According to a second aspect of the present invention, in the control device for a hybrid vehicle according to the first aspect, when the hybrid vehicle travels, the heat engine, the electric motor, the power transmission system, The power supply device further includes control mode switching means for selectively switching a plurality of control modes having different control modes for at least one of the power supply devices, and further comprising the plurality of control modes, wherein the plurality of control modes are switched by the control mode switching means. Execution of a specific control mode of the control mode, and shall change the control content so as to limit according to the detection of the occurrence of the situation by the detection means, the change mode switching means,
According to the situation where the occurrence is detected by the detection means,
The changing mode of the changing unit is switched so as to make the restriction mode of the execution of the specific control mode different.

In a hybrid vehicle in which at least one of a heat engine, an electric motor, and a power transmission system has a different control mode when the vehicle is running, when the output of the electric motor is reduced, a plurality of control modes are selectively switched. The execution of a specific control mode among the plurality of control modes may become difficult or impossible.

Therefore, in the configuration according to the second aspect,
When the detection means detects the occurrence of a situation that causes a decrease in the output of the electric motor, the execution of the specific control mode is restricted by the change means. In addition, at this time, the restriction mode of the execution of the specific control mode can be switched according to the situation in which the occurrence is detected. That is, in this configuration, execution of a specific control mode is prohibited,
A restriction mode, such as prohibition of switching from another control mode to a specific control mode, change of a condition for switching to a specific control mode, or timing of performing a restriction, is changed according to a situation in which occurrence is detected. Become like As a result, appropriate measures can always be taken irrespective of the situation that causes the output of the electric motor to decrease.

Therefore, according to the second aspect of the present invention, in a hybrid vehicle that travels while selectively switching a plurality of control modes, it is preferable that the influence of the detected situations on the vehicle traveling be different. In this case, it is possible to take appropriate measures according to the situation, and it is possible to more effectively reduce the influence of the decrease in the output of the electric motor.

According to a third aspect of the present invention, in the control apparatus for a hybrid vehicle according to the second aspect, the specific control mode whose execution is restricted by the changing means is set to the electric motor mode. The control mode cannot be established unless the operation as a power source of the motor is assumed.

In a hybrid vehicle having the above-described two power sources of a heat engine and an electric motor and traveling by selectively switching among the plurality of control modes, one of such control modes is an electric motor. A control mode that cannot be established unless the operation as a power source is assumed may be set. For example, a control mode in which the output of the electric motor is highly dependent on the output of the electric motor, such as a control mode in which the output of the electric motor is actively utilized as torque assist for the output of the heat engine and a high driving force is constantly secured, is used. If the operation as the power source of the motor is not secured, it cannot be established. Therefore, the effect of the decrease in the output of the electric motor on such a control mode is very significant.

Therefore, in the configuration according to the third aspect,
If the detection means detects the occurrence of a situation that causes a decrease in the output of the electric motor, it cannot be established unless the operation as a power source of the electric motor is premised as described above. Execution of the control mode having a significant effect is restricted in a manner corresponding to the detected situation.

Therefore, according to the third aspect of the present invention, a control mode which cannot be established unless the operation of the electric motor as a power source is assumed is executed, and the output of the electric motor during traveling is reduced. Even if the vehicle is a hybrid vehicle that may be particularly significantly affected, the effect can be effectively reduced.

According to a fourth aspect of the present invention, in the control apparatus for a hybrid vehicle according to any one of the first to third aspects, the electric vehicle in a state where the occurrence is detected by the detection means is detected. The change mode switching means is configured to switch the change mode of the control content by the change means in accordance with the degree of influence on the output reduction of the motor.

As described above, there are a plurality of situations that may cause a decrease in the output of the electric motor, and the degree of influence on the decrease in the output of the electric motor may differ depending on each situation. Therefore, it is desirable to determine the above-mentioned degree of influence of the situation in which the occurrence is detected, and to appropriately change the manner of change of the control content thereafter according to the degree of influence.

[0023] In this respect, in the configuration according to the fourth aspect,
The change mode of the control contents can be switched by the change mode switching means according to the degree of influence of the detected situation on the output reduction of the electric motor. For this reason, the control content is changed in an appropriate manner in accordance with the degree of influence on the output reduction for each situation in which the occurrence is detected. By the way, as the degree of the influence of the detected situation is greater, the dependence on the electric motor for running the hybrid vehicle is reduced, or the output of the electric motor and the operation frequency are controlled so as to be suppressed. If the content is changed, it is possible to more suitably reduce the influence of the decrease in the output of the electric motor on traveling.

In any case, according to the fourth aspect of the present invention, the control content can be changed in an appropriate manner according to the degree of the effect of the situation on the output reduction of the electric motor. The effect of the decrease in the output of the motor can be more effectively reduced.

According to a fifth aspect of the present invention, in the control apparatus for a hybrid vehicle according to the second or third aspect, the output of the electric motor in a state where the occurrence is detected by the detection means is provided. The change mode switching means is configured such that the change mode of the control content by the change means is switched such that the degree of restriction on execution of the specific control mode increases as the degree of influence on the decrease increases. I have.

Even when the execution of a specific control mode is restricted in response to the detection of the occurrence of a situation that causes a decrease in the output of the electric motor as described above, the degree of the influence of the detected situation on the decrease in the output of the electric motor. It is desirable to appropriately switch the degree of the restriction in accordance with.

Therefore, in the configuration according to the fifth aspect,
The degree of restriction on the execution of a specific control mode is increased by the change mode switching means as the degree of influence on the output reduction of the electric motor in the situation where the occurrence is detected by the detection means is greater. In other words, in this configuration, the greater the effect of the situation that occurs on the output reduction, the more the execution of the specific control mode affected by the situation is greatly limited.

Therefore, according to the fifth aspect of the present invention, the execution of a specific control mode affected by the situation can be appropriately restricted in accordance with the degree of influence of the situation on the output reduction of the electric motor. As a result, the effect of the decrease in the output of the electric motor can be more effectively reduced.

According to a sixth aspect of the present invention, in the hybrid vehicle according to the fifth aspect, the specific control is performed when the degree of the influence of the situation detected by the detection means is large. The control mode is changed by the changing means so as to immediately prohibit the control according to the mode and to prohibit the transition from the control mode other than the specific control mode to the specific control mode when the degree of the influence is small. The change mode switching means is configured to switch.

If the control mode is suddenly prohibited while the vehicle is running in a certain control mode, the running state of the vehicle may be inadvertently changed, giving the driver an uncomfortable feeling. For this reason, even in the control mode in which the execution is difficult or impossible due to the effect of the output decrease, the above-mentioned prohibition is reserved so that the control mode is not changed suddenly while the vehicle is running as long as there is a margin. It is desirable to do.

Therefore, in the structure according to the sixth aspect,
Even if the occurrence is detected by the detection means, as long as the degree of influence on the output decrease of the situation is small and there is a margin, it is only prohibited to shift to a specific control mode,
If the vehicle is traveling in the same control mode, traveling is continued in the same control mode. Then, the vehicle is allowed to continue running in the control mode for the time being, so as to avoid a sudden change of the control mode during the running of the vehicle.

On the other hand, if the degree of influence of the detected situation is large and there is no margin, the control mode is immediately prohibited even during traveling in the control mode. By making the limiting modes different in this way, it is possible to reduce the driver's discomfort while appropriately avoiding the influence of the output reduction of the electric motor.

Even when the traveling in the specific control mode is continued because the degree of influence is small, if the situation worsens during the continuation, the occurrence of the situation having the greater degree of influence is detected. Certain control modes are prohibited.

Therefore, according to the present invention, it is possible to reduce the discomfort caused to the driver by suddenly changing the control mode while the vehicle is running, and to reduce the influence of the decrease in the output of the electric motor. Can be reduced.

According to a seventh aspect of the present invention, in the control apparatus for a hybrid vehicle according to the sixth aspect, the degree of the influence of the situation where the occurrence is detected by the detection means is small, and To prohibit the control according to the specific control mode while the vehicle is stopped,
The change mode switching means is configured to switch a change mode of the control content by the change means.

As described above, when the degree of the influence of the detected situation on the output decrease is small, it is only prohibited to shift to the specific control mode. If prohibition is not performed, improper switching of the control mode is reduced, and discomfort to the driver can be reduced. However, even in this case, although the degree of influence is relatively small and the margin is relatively large, since the occurrence of a situation that causes a decrease in output has been detected, it is within a range in which a sense of discomfort to the driver can be avoided. It is desirable to immediately prohibit traveling in the control mode. On the other hand, if the vehicle is not running, even if the control mode is suddenly changed, the driver is less likely to feel uncomfortable.

Therefore, in the configuration according to the seventh aspect,
Even if the situation causing the output decrease is detected, as long as the situation has a small degree of influence on the output decrease and there is a margin, unless the vehicle is traveling in a specific control mode at that time, the control proceeds to the specific control. Is prohibited, and if the vehicle is traveling in the same control mode, the specific control mode is prohibited after waiting for the vehicle to stop. For this reason, it is possible to relatively quickly prohibit traveling in a specific control mode that is affected by a decrease in output, while suitably avoiding unexpected change of the control mode during traveling of the vehicle. .

Therefore, according to the present invention, it is possible to further reduce the driver's discomfort due to inappropriate switching of the control mode, while effectively reducing the effect of the output reduction of the electric motor. Will be able to

<Eighth Aspect> According to an eighth aspect of the present invention, in the control apparatus for a hybrid vehicle according to any one of the fourth to seventh aspects, the detecting means is configured to perform the control based on at least a temperature of the power supply device. In the configuration for detecting the occurrence of a situation, the change mode switching means may further change the control mode by the change means by changing the temperature of the power supply to the allowable temperature range of the power supply by the detection means. The change to the change mode when the degree of influence is smaller is performed on condition that the occurrence of a situation in which the influence becomes equal to or more than the predetermined value lower than the upper limit is detected near the upper limit of Is switched to a change mode when the degree of influence is greater on the condition that occurrence of a situation in which the temperature is equal to or higher than the upper limit value of the allowable temperature range of the power supply device is detected. It is the things.

In a power supply device such as a secondary battery or a fuel cell used as a power supply source of an electric motor in the above-mentioned hybrid vehicle, the temperature of the device itself exceeds an allowable temperature range during continuous use in a high temperature environment. May rise. Therefore, when the temperature of the power supply rises beyond its allowable temperature range, it is necessary to immediately stop or limit the power supply from the power supply. Further, even when the temperature of the power supply device is near the upper limit of the allowable temperature range, it is desirable to stop or limit the power supply within the maximum possible range in order to prevent a further rise in temperature.

Therefore, in the structure according to the eighth aspect,
The detecting means is configured to monitor the temperature of the power supply device and detect a plurality of situations including at least an excessive rise in the temperature of the power supply device. If the temperature of the power supply is in the vicinity of the upper limit of the allowable temperature range and is equal to or greater than a predetermined value lower than the upper limit and less than the upper limit, the degree of influence of the detected situation on the output decrease is smaller. The control content is changed in an aspect. Further, when the temperature of the power supply device further rises and becomes equal to or higher than the upper limit value of the allowable temperature range, the control content is changed in a manner when the degree of influence is greater.

That is, in this configuration, when the temperature of the power supply rises to near the upper limit of the allowable temperature range, there is still some margin, but the output of the electric motor may eventually decrease. When it is determined that there is, the control content is changed according to such a situation. When the temperature of the power supply rises above the upper limit value, it is determined that there is no more time for a change, and the control content is changed according to such a condition.

Therefore, according to the present invention, when the temperature of the power supply rises, the degree of the effect on the output decrease of the electric motor is judged from the temperature, and the control content is changed according to the situation. By doing so, it is possible to more effectively reduce the effect of the output reduction of the electric motor.

According to a ninth aspect of the present invention, in the control device for a hybrid vehicle according to any one of the fourth to eighth aspects, the detecting means is configured to perform the control based on at least a temperature of the power supply device. In a configuration in which occurrence of a situation is detected, the change of the control content by the change unit may be further changed by changing the state in which the temperature of the power supply is lower than or equal to a lower limit value of an allowable temperature range of the power supply by the detection unit. The change mode switching means is configured to switch to a change mode in which the degree of influence is larger on condition that the occurrence of the change is detected.

For example, when the temperature of the power supply is extremely low (for example, “-20 ° C.”) below the allowable temperature range, such as when the vehicle is started during extremely cold time, the chemical reaction involved in the generation of electric power does not occur. It may become active and interfere with its power supply.

Therefore, in the structure according to the ninth aspect,
The detecting means is configured to monitor the temperature of the power supply device and detect at least a plurality of situations including an excessively low temperature of the power supply device. Then, when the temperature of the power supply device becomes equal to or lower than the lower limit value of the allowable temperature range, the control content is changed when the degree of influence of the above situation is greater.

Incidentally, the temperature of the power supply device is usually the lowest when the vehicle is started (when the power supply of the power supply device is started), and thereafter rises until the temperature reaches the equilibrium temperature. For this reason, once it is confirmed that the power supply device is not at a very low temperature at the time of starting the vehicle, the temperature of the power supply device is unlikely to drop below the lower limit of the allowable temperature range during traveling. Therefore, when the power supply device is controlled at a low temperature, the output of the electric motor is appropriately reduced without intentionally changing the control contents stepwise as the power supply device temperature decreases, as in the case of the temperature rise of the power supply device described above. Can be reduced.

When the configuration described in claim 9 is applied to the configuration described in claim 6 or claim 7, it can be determined that the power supply device is at an extremely low temperature at the time of starting the vehicle. Since the control of the specific control mode can be prohibited at the place, the control mode is not suddenly changed while the vehicle is traveling, so that the driver does not feel uncomfortable.

In any case, according to the ninth aspect of the invention, it is possible to effectively reduce the influence of a decrease in the output of the electric motor when the power supply device is in an extremely low temperature state.

According to a tenth aspect of the present invention, in the control apparatus for a hybrid vehicle according to any one of the fourth to ninth aspects, the detection means is provided at least for a power supply margin of the power supply device. In the configuration, the occurrence of the situation is detected based on the condition in which the change of the control content by the changing means is further reduced to a first predetermined amount or less by the detecting means. Is switched to a change mode when the degree of influence is smaller under the condition that the occurrence of the power supply is detected, and the power supply margin of the power supply device is reduced to the first by the detection means.
The change mode switching means is configured to switch to a change mode in which the degree of influence is larger on condition that occurrence of a situation reduced to a second predetermined value smaller than a predetermined value smaller than the predetermined amount is detected. is there.

For example, if the power supply capacity of the power supply device is reduced due to a decrease in the amount of power stored in the secondary battery or a decrease in the remaining amount of fuel in the fuel cell, the power supply will not be sufficient enough and the output of the electric motor will decrease. Will be invited.

Therefore, in the configuration according to the tenth aspect, the detection means is configured to monitor the power supply capacity of such a power supply device and detect a plurality of situations including at least a shortage of the power supply capacity. ing. And
When the power supply capacity of the power supply device is reduced to the first predetermined amount or less, it is determined that there is still some margin, and the control content is changed in a mode when the degree of influence on the output reduction of the electric motor is small. I am trying to implement it. When the power supply capacity of the power supply device further decreases and drops below the second predetermined amount, which is smaller than the first predetermined amount, it is determined that there is no more delay and the above-described influence degree is large. The control contents are changed in the manner described above.

Therefore, according to the present invention, when the power supply capacity of the power supply device is reduced, the degree of the influence on the output reduction of the electric motor is determined based on the power supply capacity to meet the situation. By changing the control content, the effect of the output reduction of the electric motor can be reduced more effectively.

According to the eleventh aspect of the present invention, in the control device for a hybrid vehicle according to the tenth aspect, the power supply device is a fuel cell, and the fuel cell is further grasped from a remaining fuel amount of the fuel cell. The detecting means is configured to detect the occurrence of the situation based on the remaining power supply capacity.

According to the eleventh aspect of the present invention, in a hybrid vehicle employing a fuel cell as a power supply device, the degree of influence on the output reduction of the electric motor from the remaining fuel amount that accurately indicates the remaining power supply of the fuel cell. And the control content is changed according to the situation. Compared to a secondary battery or the like whose power storage capacity fluctuates while the vehicle is running, the fuel cell can more accurately determine the remaining power supply of the power supply from the remaining fuel level of the fuel cell. Therefore, it is possible to more accurately estimate the effect of the decrease in the output of the electric motor due to the above.

Therefore, according to the eleventh aspect of the present invention, in a hybrid vehicle employing a fuel cell as a power supply device, the effect of a decrease in the output of the electric motor caused by insufficient power supply capacity of the power supply device can be further effectively reduced. Can be reduced.

According to a twelfth aspect of the present invention, in the control apparatus for a hybrid vehicle according to any one of the fourth to eleventh aspects, the detection means is provided based on at least abnormality detection of a power supply system. The change of the control content by the change means,
The change mode switching means is configured to switch to a mode in which the degree of influence is greater on condition that the occurrence of a situation in which the abnormality of the power supply system is detected by the detection means is detected.

The occurrence of an abnormality in the power supply system, that is, the occurrence of a system abnormality relating to the operation of an electric motor such as a power supply device, an electric motor, or a control circuit thereof, affects the output of the electric motor.

In view of the above, in the configuration according to the twelfth aspect, the detecting means is configured to detect a plurality of situations including at least an abnormality in the power supply system as the situation that causes the output of the electric motor to decrease. Then, when such an abnormality of the power supply system is detected, the control content is changed in such a manner that the degree of influence on the output reduction of the electric motor is greater. Therefore, this claim 12
According to the invention described in (1), it is possible to effectively suppress the effect of the output decrease of the electric motor when the power supply system is abnormal.

According to a thirteenth aspect of the present invention, in the control device for a hybrid vehicle according to any one of the first to twelfth aspects, according to a situation in which occurrence is detected by the detecting means, The change mode switching means is configured to switch the change mode by the change means so as to change the control content change timing.

As described above, there are various situations in which the output of the electric motor decreases, and depending on the situation, the time margin until the output decreases and the degree of the output decrease may differ. For this reason, when the occurrence of such a situation is detected, even though the control contents of the heat engine, the electric motor, the power transmission system, and the like are uniformly changed, it is desirable to appropriately change the change timing according to the situation.

In this respect, in the configuration according to the thirteenth aspect, when the control content is changed on condition that the occurrence of the situation is detected, the change timing of the control content is changed according to the detected situation. become. Therefore, the control content is changed at an appropriate time according to the detected situation. For example, if the timing of changing the control content is adjusted according to a time margin from the detection of the occurrence of the above situation to the occurrence of the inconvenience in the vehicle control, the normal control can be maintained within a possible range. Will be able to Similarly, when there is enough time, by suspending the change of the control content until an appropriate time, it is possible to preferably avoid problems such as deterioration in drivability due to the change.

In any case, according to the thirteenth aspect of the present invention, the control contents can be changed at a more appropriate time, and the effect of the decrease in the output of the electric motor can be more effectively reduced. Will be able to

According to a fourteenth aspect of the present invention, in the control device for a hybrid vehicle according to the thirteenth aspect, the time when the occurrence is detected is determined according to a situation in which the occurrence is detected by the detection means. The change mode switching means is configured to switch the change mode by the change means so as to make a change timing of the control content different from when the vehicle is stopped after the detection.

As described above, the time margin from the detection of the occurrence to the occurrence of inconvenience differs depending on the situation that causes the output of the electric motor to drop, so that depending on the situation, the change of the control content is reserved to some extent. be able to. On the other hand, if such a change in the control content is made while the vehicle is running, depending on the manner of the change, drivability may be degraded, such as torque fluctuation, and in such a case, the control content may be changed. It is desirable to do this while the vehicle is stopped.

In this respect, in the configuration according to the fourteenth aspect, the change timing of the control content performed on the condition that the detection of the occurrence of the situation by the detecting means is performed at the time of detection and after the detection in accordance with the detected situation. It will be changed between when the vehicle is stopped. Therefore, for example, when there is a time margin from the detection of the situation to the occurrence of the inconvenience, the change of the control content can be suspended until the vehicle is stopped. As a result, it is possible to reduce the change in the control content during the running of the vehicle, and it is possible to effectively reduce problems such as deterioration in drivability caused by the change in the control content.

Therefore, according to the fourteenth aspect of the present invention, it is possible to effectively reduce the trouble caused by the change of the control contents during the running of the vehicle, and to more effectively reduce the influence of the decrease in the output of the electric motor. Can be reduced.

According to a fifteenth aspect of the present invention, in the control device for a hybrid vehicle according to any one of the first to fourteenth aspects, at least a temperature rise of the power supply device and a warm-up of the power supply device are provided. The detecting means is configured to detect occurrence of a plurality of situations including a shortage of the power supply, a reduction in power supply capacity of the power supply device, and detection of an abnormality in the power supply system.

As described above, if the power supply deviates from an appropriate temperature range due to a rise in temperature beyond the proper temperature range or insufficient warm-up, or if the power supply has insufficient power supply capacity, the electric motor will May be difficult to supply sufficient power. Also, the occurrence of an abnormality in the power supply system, that is, the occurrence of a system abnormality relating to the operation of the electric motor such as the power supply device, the electric motor, or their control circuits may affect the proper operation of the electric motor.

In view of the above, in the configuration according to the fifteenth aspect, the temperature of the power supply, the remaining power supply, and the abnormality of the power supply system are monitored to detect a plurality of situations that cause such a decrease in the output of the electric motor. . By performing detection in this manner, the influence on the output reduction of the electric motor can be accurately grasped, and if the control content is changed in a different manner depending on the situation in which the occurrence is detected, the situation can be changed. Appropriate measures can be taken.

According to the fifteenth aspect of the present invention, it is possible to accurately grasp the occurrence of a situation that causes a decrease in the output of the electric motor, and to reduce the influence more effectively. become able to.

[0072]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, a first embodiment of a control device for a hybrid vehicle according to the present invention will be described in detail with reference to FIGS.

FIG. 1 schematically shows a hybrid system of a hybrid vehicle to which the present embodiment is applied. Next, the configuration of the hybrid system of the present embodiment will be described with reference to FIG.

As shown in FIG. 1, the hybrid system is mainly composed of two power sources, an engine 10 and a main motor / generator (“main M / G”) 12, and power is supplied to the main M / G 12 and the like. And a power transmission system (13, 14, etc.) for transmitting the power generated by the two power sources to the drive wheels 16. ing.

The engine 10 of the above two power sources
Is a heat engine that generates power by burning fuel ("combustion fuel": gasoline fuel, diesel fuel, etc.).
In the present embodiment, a gasoline engine is employed as the engine 10. On the other hand, the main M / G12
In addition to functioning as an “electric motor” that generates power by electric energy supplied from the power supply devices 20 and 21, it also functions as a generator that generates power by receiving rotation of the engine 10 and the like except when power is generated.

Of the two power supply devices for supplying power to the main M / G 12, etc., the fuel cell 20 uses fuel ("fuel for power generation": hydrogen fuel, methyl alcohol fuel, etc.) supplied from outside. Electric power is generated by changing to electricity by electrochemical oxidation. On the other hand, the secondary battery 21
Is charged with the electricity generated by the main M / G 12 and the like, and supplies power with the electricity stored here.

In this hybrid system, a sub motor / generator (“sub M / G”) 18 is provided as a generator in addition to the main M / G 12. This sub M / G
Reference numeral 18 denotes a winding transmission mechanism 1 such as a timing belt.
Output shaft (crankshaft) of engine 10 via
Drive-coupled. The sub M / G 18 functions not only as a generator for generating electricity by receiving the rotation of the engine 10 but also as a starter motor for starting the engine 10.

The main M / G 12 and the sub M / G 18 are
The connection to the fuel cell 20 and the secondary battery 21 is selectively switched by the power supply changeover switches 63 and 64, respectively. For this reason, the power supply source when the main M / G 12 and the sub M / G 18 function as electric motors can be arbitrarily switched according to the situation. However, in this hybrid vehicle, the fuel cell 20 capable of more stable power supply is mainly selected as a power supply source when functioning as an electric motor. On the other hand, these main M / G1
When the second and sub M / Gs 18 are functioning as generators, the connection is switched to the secondary battery 21 by the respective power supply changeover switches 63 and 64 so that the generated electricity is charged in the secondary battery 21. I have to.

As described above, the hybrid system includes two power sources having different characteristics, that is, the engine 10 and the main M / G (“electric motor”) 12. Subsequently, an outline of a power transmission system for transmitting the power generated by these two power sources to the drive wheels will be described.

The output shaft of the engine 10 is connected to the clutch mechanism 1
1 is connected to the rotating shaft of the main M / G 12 so as to be able to arbitrarily connect / disconnect. Further, the rotating shaft of the main M / G 12 is provided with a torque converter 13 and a gear type transmission mechanism 1.
The driving wheels 16 are connected via a power transmission system such as an automatic transmission ("AT") composed of four or the like. In the present embodiment, a six-speed transmission is used as the gear-type transmission 14.

The torque converter 13 of the automatic transmission
The torque is adjusted by transmitting the rotation input via the rotation shaft of the main M / G 12 via a fluid (oil). Note that the torque converter 13 has a main M
/ G12 is mechanically directly connected to the input shaft of the gear transmission mechanism 14 and has a lock-up function that enables direct torque transmission without mediating the fluid.
By performing such lock-up according to the running conditions of the vehicle, torque loss due to slippage of the fluid is reduced, and fuel efficiency is improved.

In this hybrid vehicle, each power source 10, 10 is transmitted through a power transmission system such as the automatic transmissions 13, 14.
The driving is performed by driving the driving wheels 16 by the driving wheels 12.
A power transmission mechanism including the automatic transmissions 13 and 14 and the clutch mechanism 11 or the power sources 10 and 12 described above.
Is controlled appropriately in accordance with the traveling conditions of the vehicle, thereby enabling highly efficient traveling with excellent fuel efficiency and emission performance.

FIG. 2 is a block diagram schematically showing an electric configuration of a control system of the hybrid vehicle. continue,
The configuration of the control system of the hybrid vehicle in the present embodiment will be described with reference to FIG.

As shown in FIG. 2, the control system of the hybrid vehicle is mainly composed of an electronic control unit (“ECU”) 30. The ECU 30 is configured by an electronic circuit group including an engine control computer, an AT control computer, and the like. The ECU 30 executes various controls according to the running conditions of the vehicle and the like, which are grasped based on the detection results of various sensors provided in various parts of the vehicle.

The hybrid vehicle mainly includes the following sensors and control target devices. In this hybrid vehicle, as a sensor and an operation switch for detecting a driver's operation condition and a vehicle's running condition, a vehicle speed sensor 45 for detecting a vehicle's running speed ("SPD"). A shift position sensor 46 for detecting the operation position of the shift lever (“shift position”). An accelerator sensor 47 for detecting the amount of depression of an accelerator pedal. A shift mode changeover switch 49 for switching a shift operation mode to be described later. A power mode changeover switch 50 for switching the running mode. And so on. The ECU 30 controls the hybrid system including the engine 10, the main M / G 12, the automatic transmissions (13, 14), and the like as described below with reference to these detection results.

In this hybrid vehicle, the sensors for detecting the operating conditions of the engine 10 include: a rotational speed sensor 44 for detecting the rotational speed (“NE”) of the engine 10. An air flow meter 4 for detecting an intake amount of the engine 10
8. A throttle opening sensor 51 that detects the opening of the electronic throttle valve device 65 that makes the opening area of the intake passage variable; And so on.

On the other hand, the control target devices related to the control of the engine 10 include the above-mentioned electronic throttle valve device 65 (intake air amount control). An igniter 66 for turning on / off the current supply to the ignition coil
(Ignition timing control). An injector 67 for injecting fuel into the engine 10 (injection timing control, injection amount control); The ECU 30 executes various controls of the engine 10 according to running conditions of the vehicle and operating conditions of the engine 10.

In this hybrid vehicle, the fuel cell 20 and the secondary battery 21, the main M / G 12 and the sub M
The FC temperature sensor 40 for detecting the temperature ("THFC") of the fuel cell ("FC") 20 as a sensor for detecting the state of each device constituting the power supply system such as / G18. An FC fuel remaining amount sensor 41 for detecting the remaining amount of fuel for power generation of the fuel cell 20; A storage amount sensor 42 for detecting the amount of electricity charged in the secondary battery 21; A secondary battery temperature sensor 4 for detecting the temperature of the secondary battery 21
3. And so on. Further, the ECU 30 directly monitors the voltages of the fuel cell 20 and the secondary battery 21.

On the other hand, the control target devices for controlling the power supply system include: a main M / G control circuit 60 for controlling the operation of the main M / G 12 (eg, torque control of an electric motor). A sub-M / G control circuit 61 for controlling the operation of the sub-M / G 18; A power switch 6 for switching a power supply device connected to the main M / G 12 and the sub M / G 18 described above;
3,64. And so on.

Further, in this hybrid vehicle, an AT line pressure control solenoid 62 for controlling the hydraulic pressure of the gear type transmission mechanism 14 is provided as a control target device for controlling the operation of the power transmission system. A clutch control solenoid 69 for hydraulic control for engaging (disconnecting the output shaft of the engine 10 and the rotary shaft of the main M / G 12) / disengaging (disconnecting) the clutch mechanism 11; A lock-up control solenoid 70 for controlling hydraulic pressure related to execution / release of lock-up by the torque converter 13; A solenoid 71 for controlling the hydraulic pressure of the gear-type transmission mechanism 14 for shifting. And so on. The operations of the clutch mechanism 11, the gear-type transmission mechanism 14, and the torque converter 13 based on the operation control of each of the solenoids 62, 69, 70, 71 are controlled according to vehicle traveling conditions such as a vehicle speed and the accelerator opening. ing.

As will be described later, in this embodiment, when the main M / G ("electric motor") 12 functions as a power source and the output is insufficient, the hybrid system is controlled. The execution of the specific control is restricted. For this reason, the vehicle is provided with a warning light 68 for notifying the driver that such restrictions are being implemented, for example, on an instrument panel in the vehicle interior. The turning on / off of the warning light 68 is also performed under the control of the ECU 30.

Next, an outline of the hybrid system control relating to the running of the hybrid vehicle will be described.
This hybrid vehicle includes two power sources having different characteristics as described above, that is, the engine 10 which is a heat engine and the main M / G 12 which functions as an electric motor.
Then, the ECU 30 controls the hybrid system so as to ensure high engine efficiency by appropriately combining these two power sources according to the running conditions of the vehicle. Incidentally, in the hybrid vehicle of the present embodiment, the operation regions of the respective power sources are set for each of the shift positions.

FIG. 3 shows an example of setting the operating area of each power source. FIG. 4 shows setting examples of switchable gear positions of the automatic transmission (gear-type transmission mechanism 14) at each shift position.

In the example shown in FIG. 3, the power source is switched in accordance with the region set based on the vehicle speed and the amount of depression of the accelerator pedal ("accelerator opening"). However, the gear position of the gear-type transmission mechanism 14 of the automatic transmission is limited by the shift position as illustrated in FIG. The operating range of each power source is set differently for each shift position. Incidentally, FIG. 3A shows an example of setting an operation area at the time of a drive (“D”) position in which the shift speed can be switched from “first speed” to “sixth speed”, and FIG. Change gear to "1st speed"
And a setting example of the operation area at the time of the second (“2”) position restricted only between “2nd speed”.

Then, according to the operation range set as exemplified in FIG. 3, the vehicle travels in the following control manner. <When starting the vehicle> In a low-speed running region such as when starting the vehicle where the engine efficiency is deteriorated, the running is performed using only the electric motor (main M / G12) as the power source. Therefore, the engine 10 is stopped in a low-speed traveling region such as when the vehicle starts. At this time, the clutch mechanism 1 is controlled by hydraulic control based on drive control of the clutch control solenoid 69.
1 is released, and the engine 10 is disconnected from the power transmission system. At this time, power is mainly supplied to the main M / G 12 from the fuel cell 20.

<Normal traveling> When the vehicle is once started and the traveling conditions are such that sufficient engine efficiency can be ensured, traveling is performed using only the engine 10 as a power source. At this time, the engine 10 is started to generate power, and the clutch mechanism 11 is engaged by hydraulic control based on drive control of the clutch control solenoid 69, so that the power of the engine 10 can be transmitted to the drive wheels 16. Becomes On the other hand, at this time, the main M / G 12
It is rotated by 0 to function as a generator. The electricity generated here is stored in the secondary battery 21.

Further, in this hybrid vehicle, the engine 10 and the electric motor (main M
/ G12) is used as a power source for traveling. At this time, the main M / G 12 is
Electric power is supplied from 0 and 21 to function as an electric motor. As a result, the torque output from the engine 10
/ G12 is added to increase the total torque as a whole. Such an electric motor (main M /
By performing the torque assist according to G12), high driving force characteristics are secured.

In the hybrid vehicle of the present embodiment, a region in which both the engine 10 and the electric motor 12 are used as power sources, that is, a region in which torque assist is performed by the electric motor is set for each shift speed.

FIG. 5 shows an example of setting the torque assist characteristics of the electric motor at each of these gear positions. This figure 5
5 shows the relationship between the input torque of the transmission at the 4th, 5th and 6th speeds, that is, the sum of the torques of the engine 10 and the electric motor 12 (“total torque”) and the accelerator opening, respectively. FIG. 5 also shows the relationship between the accelerator opening and the torque output by only the engine 10 (“engine torque”). And
The difference between the engine torque and the total torque at each shift speed indicates the amount of torque assist at each shift speed.

As shown in FIG. 5, the region in which torque assist is performed by the electric motor is set in accordance with the accelerator opening for each gear. The torque required for the rotation of the drive wheels 16 increases as the speed ratio becomes smaller at a higher speed, so that the area where the torque assist is performed is set to become wider as the speed becomes higher. By the way, in the example of FIG. 5, the accelerator opening is only at the middle to high opening during the "fourth speed", and the torque assist is performed in the entire region at the "fifth speed" and the "sixth speed". I have.

In the hybrid vehicle according to the present embodiment, as described above, the gear type transmission mechanism 14 of the automatic transmission is used.
A six-speed transmission mechanism is employed. In the present embodiment, a so-called overdrive speed ratio (for example, about “0.8”) in which the output rotation is higher than the input rotation of the transmission is set to the fifth speed of the gear transmission mechanism 14. ing. Further, a smaller gear ratio (for example, about “0.6”) is set for the sixth gear, which is the highest gear.

When such a gear train configuration is adopted, during high-speed cruising, traveling at the sixth speed, in which the gear ratio is set particularly small, is continued and the engine speed is kept low, so that fuel efficiency during high-speed traveling is improved. be able to.

However, at the time of "sixth speed running" in which the gear ratio is set to be small, the automatic transmissions 13, 14
Output torque is naturally reduced, and a high assist torque is required. Also, for this reason, the required amount of the assist torque is greatly increased or decreased due to a slight change in the road condition or the like. As a result, if the assist torque is not sufficiently ensured, the shift frequency between the fifth speed and the sixth speed during high-speed cruising becomes high, and it may be difficult to ensure drivability.

Therefore, in the present embodiment, in order to avoid such an increase in the shift frequency during high-speed cruising, the torque assist by the electric motor 12 during “sixth-speed running” is more positively implemented. It ensures the necessary total torque when driving. In the setting example shown in FIG. 5, the torque assist characteristic at the time of "sixth speed running" is set so that a large amount of torque assist is performed in all regions and the amount of torque assist at a low opening degree of the accelerator is increased. are doing. For this reason, the increase in the required torque during high-speed cruising can be absorbed to a certain extent by the torque increased by the torque assist.
It is possible to continue running without shifting to high speed. By performing such torque assist, even when the gear train configured as described above is applied to an engine with a relatively small output, it is possible to improve fuel efficiency at high speeds while ensuring sufficient drivability. You can plan.

However, there are the following problems in employing such a control mode in which the vehicle continuously travels in a state largely dependent on the torque assist of the electric motor.
At the time of "fifth speed running" or "fourth speed running", the added amount of the engine torque by the torque assist of the electric motor 12 is not so large. For this reason, even if the power supply device 20,
Even if torque assist by the electric motor 12 becomes impossible due to insufficient power supply from the motor 21 or the like, traveling can be continued with almost no trouble only by the output of the engine 10. In addition, the decrease in the total torque at this time is not so large, and the driver hardly feels uncomfortable.

However, at the time of "sixth-speed running", the output of the electric motor 12 is added to the output of the engine 10, and the decrease cannot be complemented by the engine torque. The total torque may be reduced. And as a result,
There is a possibility that continuation of “sixth speed running” may become difficult. Also,
Even if the traveling can be continued, the driving force characteristics of the vehicle may be reduced by an amount corresponding to the decrease in the torque assist amount, and the driver may feel a sense of strangeness.

In particular, in the case of a hybrid vehicle employing a secondary battery whose power storage amount fluctuates during running as a power supply device, when the output of the electric motor is reduced due to insufficient power supply, such electric motor is not assisted by torque. It is relatively difficult to adopt a control mode that largely depends on the control mode. Therefore, in a hybrid vehicle employing such a secondary battery as a power supply device, usually, even when the output of the electric motor is reduced, the reduced amount can be complemented by the engine torque, or even if the total torque is reduced by the amount of no torque assist. The amount of torque assist is limited to a range that does not hinder driving.

Incidentally, the fuel cell 2 according to the present embodiment is
In the case of a hybrid vehicle employing 0 as a power supply device, a control mode that cannot be established unless torque assist of such an electric motor is assumed can be relatively easily adopted as described below.

Normally, a fuel cell can supply power stably until the fuel runs out. Therefore, when the fuel cell is used as the power supply device, the output of the electric motor can be more stably and continuously secured as compared with the case where the secondary battery in which the charged amount fluctuates during traveling is used. .
As described above, in the fuel cell, the output reduction of the electric motor due to the power supply shortage cannot occur at a very high frequency, and the shortage of the fuel remaining amount causing the power supply shortage can be easily predicted. Even in a control mode in which the vehicle continuously runs in a state largely dependent on the assist, it can be adopted relatively easily.

However, even in a hybrid vehicle employing such a fuel cell as a power supply device, if the fuel of the fuel cell runs out, torque assist by the electric motor cannot be executed. In addition, factors other than such a fuel shortage may cause a decrease in the output of the electric motor 12, and although the frequency of occurrence is low, torque assist is assumed due to the decrease in the output of the electric motor 12. There is a possibility that the execution of the “sixth speed running” will be hindered.

Therefore, the control device for a hybrid vehicle according to the present embodiment detects the occurrence of a situation that causes the output of the electric motor 12 to decrease, and restricts the execution of “sixth-speed running” in response to the detection. I have.

In this embodiment, the ECU 30 detects the occurrence of a situation that causes the output of the electric motor 12 to decrease.
Are the temperature of the fuel cell 20 based on the detection result of the FC temperature sensor 40 (“THFC”),
1, the fuel remaining amount of the fuel cell 20 based on the detection result
The diagnostic result of the self-diagnosis function of the hybrid system provided in the CU 30 itself is constantly monitored. Then, it is determined that the output of the electric motor 12 decreases or may eventually decrease with the occurrence of the situations listed below.

<Exceeding the optimum temperature range of the fuel cell> For example, when the power supply from the fuel cell 20 is continued for a long time in a high temperature environment, the temperature of the fuel cell 20 may rise above the optimum temperature. If the temperature of the fuel cell 20 rises beyond its proper temperature range, not only will the power supply be hindered, but depending on the situation, the durability of the fuel cell 20 may be impaired. For this reason, when the temperature of the fuel cell 20 rises too much, it is necessary to stop the power supply from the fuel cell 20, and the electric motor 12 naturally becomes inoperable. In addition, even if the temperature of the fuel cell 20 rises to the warning temperature range close to the upper limit of the appropriate temperature range, it is desirable to stop the power supply as soon as possible, if possible, in order to avoid a further rise in temperature. .

<Insufficient warming-up of fuel cell> The temperature of the fuel cell 20 is low and sufficiently warmed up, for example, immediately after a cold start in an extremely low temperature environment (for example, an outside temperature of -20 ° C or less). If not, the electrochemical reaction required for power generation becomes inactive, making it impossible to supply electric power to the electric motor 12 properly.

<Insufficient Fuel in Fuel Cell> If the fuel for power generation in the fuel cell 20 (“FC fuel”) runs out, it is naturally impossible to supply power to the electric motor 12 any more, and torque assist is also executed. become unable. Further, if the FC fuel is low, although there is still room, power supply will eventually be impossible. It should be noted that whether or not the continuity of power supply to the electric motor 12 is sufficient, that is, whether or not there is enough power to supply the fuel cell 20 can be easily grasped by monitoring the remaining amount of FC fuel.

<Detection of System Abnormality> Electric motor 1 such as main M / G 12, fuel cell 20, main M / G control circuit 60, etc.
If an abnormality occurs in the system related to the operation of Step 2, the electric motor 12 becomes inoperable, and torque assist becomes infeasible.

In the present embodiment, the execution of the "sixth-speed running" is restricted on the condition that the occurrence of the above situation is detected. Note that the hybrid vehicle according to the present embodiment includes a secondary battery 21 in addition to the fuel cell 20 as a power supply device. Therefore, the fuel cell 2
Even when the power supply from 0 becomes impossible, it is possible to continue the torque assist by the electric motor 12 by switching the power supply source to the electric motor 12 to the secondary battery 21. However, as described above, the power storage amount of the secondary battery 21 fluctuates during traveling, and the power supply tends to be relatively unstable. Therefore, in the control device for a hybrid vehicle of the present embodiment, At the time when the power supply is stopped, it is determined that the execution of the control mode in which the large torque assist needs to be continuously performed, such as the “sixth-speed running”, cannot be substantially performed.

Next, the actual procedure for limiting the execution of the "sixth speed running" will be described in detail with reference to a flowchart. FIG. 6 is a flowchart showing an "execution determination routine" for limiting the execution of the "sixth speed running". This routine is periodically executed by the ECU 30 at predetermined time intervals.

In the present embodiment, the “target control” in the flowchart of FIG. 6 refers to the engine 10, the electric motor 12, or the automatic transmission (13, 14) for the “sixth-speed running” described above. And the like, and includes the above-described torque assist control during “sixth speed running” and shift control to the sixth speed. “Permission to switch to target control” refers to permission to execute shift control to the sixth speed.

When the processing shifts to this routine,
The ECU 30 determines in steps 100 to 130 whether or not a situation that causes a reduction in the output of the electric motor 12 listed above has occurred.

In step 100, the fuel remaining amount of the fuel cell 20 (“FC fuel remaining amount”) is increased by a predetermined amount (“first predetermined amount”) in order to determine whether or not “fuel shortage of the fuel cell” has occurred. ) Is determined. By the way, the "first predetermined amount" indicates that the remaining amount of fuel in the fuel cell 20 is low and there is some problem in the continuity of power supply ("power supply margin"), but the power supply is still performed for a while. Is set as the remaining fuel amount that can be continued.

In step 110, the temperature ("THFC") of the fuel cell 20 is set close to the upper limit value ("THHD") of the allowable temperature range in order to determine whether or not "over the appropriate temperature range of the fuel cell" has occurred. Warning temperature range ("THHi <TH
FC <THHD ”) or not.

In step 120, the fuel cell 2 is checked in order to determine whether or not "insufficient warm-up of the fuel cell" has occurred.
It is determined whether the temperature of 0 is lower than the lower limit of the allowable temperature range (“THLo”) (“THFC <THLo”).

In step 130, the ECU 3
Based on the self-diagnosis result of 0, it is determined whether or not “detection of system abnormality” has occurred. Here, if it is confirmed that none of these situations has occurred (steps 100 to 130:
("NO"), in step 140, "execution of shift control to sixth speed" is permitted, and the process of this routine is temporarily ended. If the execution of the shift control is permitted at the time when this routine is once ended, the shift to the sixth speed is performed as long as the shift conditions are satisfied until the next execution of this routine. That is, if the shift position is the drive position at that time and the vehicle traveling conditions (vehicle speed, accelerator opening, etc.) for shifting to the sixth speed are satisfied within the above period, the shifting to the sixth speed is performed.

On the other hand, if the occurrence of "insufficient fuel in the fuel cell" (step 100: "YES") or "exceeding the appropriate temperature range of the fuel cell" is confirmed (step 110:
“YES”), and shifts the processing to step 160 in order to perform processing for restricting the execution of “sixth speed running”.

Even when it is determined that the "fuel shortage of the fuel cell" or "exceeding the proper temperature range of the fuel cell" has occurred, there is a certain time margin before the power supply becomes impossible. Therefore, there are a case where the torque assist by the electric motor 12 can be continued for a while, and a case where the power supply becomes impossible immediately and the torque assist cannot be executed immediately.

When it is determined that "insufficient fuel in the fuel cell" has occurred, that is, when the remaining amount of FC fuel is less than the predetermined amount, as long as the FC fuel remains even in a small amount, the fuel cell 20 can continue power generation, and can continue torque assist for a while. However, if the FC fuel is further consumed and completely exhausted, the power supply becomes impossible at that point and torque assist cannot be executed.

When it is determined that “exceeding the appropriate temperature range of the fuel cell” has occurred, that is, the FC temperature (“THF
C ") exceeds the lower limit value (" THHi ") of the alarm temperature range, and if the FC temperature is lower than the upper limit value (" THHD ") of the allowable temperature range, the fuel cell 20 supplies power. It's not impossible. Even in this case, it is desirable to stop the power supply of the fuel cell 20 as quickly as possible to prevent a further rise in temperature.
Power supply can be continued for a while. However, FC
If the temperature further rises and deviates from the allowable temperature range, torque assist can no longer be continued.

On the other hand, when the "sixth-speed running" in which the torque assist is frequently used is prohibited in response to the occurrence of such a situation that the output of the electric motor 12 is reduced, this is immediately prohibited during the execution of the "sixth-speed running". In this case, the shift to the fifth speed is executed even if there is no change in the running conditions.
The driving force characteristics of the vehicle suddenly change with the execution of the shift at this time, and inappropriate torque fluctuation or the like may occur, which may give the driver an uncomfortable feeling. Therefore, it is desirable to avoid such prohibited execution during the execution of the "sixth speed running".

Therefore, in this "execution determination routine",
As described below, the target control ("sixth-speed running") is restricted in order to avoid as much as possible the execution of the prohibition that gives a feeling of strangeness.

As described above, the occurrence of "insufficient fuel in the fuel cell" or "exceeding the proper temperature range of the fuel cell" has been confirmed, and the process proceeds to step 160. A process for restricting "running" is performed.

At step 160, it is determined whether or not the target control, that is, "sixth speed running" is being executed. Here, if the "sixth speed running" is not being executed (step 160: "NO"), it goes without saying that the prohibition of forced prohibition does not cause any discomfort. Therefore, if it is determined that "sixth-speed running" is not being executed, the process proceeds to step 150, where the "sixth-speed running" is prohibited, and the process of this routine is temporarily terminated. If the "sixth-speed running" is prohibited, shifting to the sixth speed is prohibited until the situation that causes the output reduction of the electric motor 12 is resolved, even if the shift conditions are satisfied. Become so.

On the other hand, if it is determined that "sixth speed running" is being executed at this time (step 160: "YE
S "), and the process proceeds to the subsequent step 170. In this step 170, it is determined whether or not the vehicle is stopped at that time. By the way, in this embodiment,
“Sixth speed running” is set as the “target control”, and if “sixth speed running” is being executed (step 160: YES), it is clear that the vehicle is not stopped, so step 170 is skipped. Then, the process may shift to step 180.

When the control that can be executed even when the vehicle is stopped is referred to as “target control” as in the second to fourth embodiments described later, the target control is performed when the vehicle is stopped. Even if the execution is prohibited, a sudden change in the driving force characteristic as in the above-mentioned traveling cannot occur, and the driver does not feel uncomfortable. Therefore, in such a case, if the vehicle is stopped at that time (step 170: “YES”), the above “target control”
Is executed (step 160: “YES”), the process proceeds to step 150, and “target control” is executed.
After the execution of this routine is prohibited, the processing of this routine is temporarily ended.

Now, the above-mentioned "object control"("sixth speed running")
In step 180 to which the process shifts when neither the execution nor the vehicle stop is performed, the above-described process for notifying the driver that the “sixth-speed running” restriction according to the detection of the occurrence of the above situation is being performed is performed. The warning light 68 is turned on. By the lighting of the warning lamp 68, for example, the present “execution determination routine”
In the processing of the above, even if the "sixth-speed running" is continued as it is, a situation has already occurred that causes the output of the electric motor 12 to decrease, and eventually there is a possibility that the "sixth-speed running" may be prohibited. The driver can be warned.

In the following step 190, it is determined whether or not there is any remaining FC fuel. In step 200, the FC temperature ("TH
FC ”) is the upper limit of the allowable temperature range (“ THHD ”)
Is determined, respectively.

By the way, in step 190, FC
It is determined that "there is no remaining FC fuel" on the condition that the fuel remaining amount is equal to or less than the "second predetermined amount" which is smaller than the "first predetermined amount". Note that the “second predetermined amount” is
The “FC fuel remaining amount” is set so that the power supply by the fuel cell 20 can hardly or completely be continued.

As described above, when the fuel of the fuel cell 20 is further consumed and exhausted, or when the temperature further rises and departs from the allowable temperature range, the fuel cell 2
0 means that power cannot be supplied any more. Therefore, in such a case (step 190 OR step 20)
0: “YES”), the process proceeds to step 150, forcibly prohibiting the execution of “sixth speed running”, and once terminating the process of this routine.

In this case, during “sixth-speed running”, 5
Although the shift to the high-speed gear may cause a feeling of strangeness to the driver, such measures must be taken as long as the torque assist cannot be continued.

On the other hand, if the situation has not been reached, and there is still room (step 190 AND step 200: “NO”), the processing of this routine is once terminated. In this case, as a measure during this routine, only the warning lamp 68 is turned on, but the shift control to the sixth speed is not permitted. For this reason, once the “sixth speed running” is stopped due to a change in running conditions, etc., until the above situation is resolved, even if the shifting conditions are established again,
The shift to the sixth speed is not performed, so that the "sixth speed running" is not executed again.

As described above, when "insufficient fuel in the fuel cell" or "exceeding the appropriate temperature range of the fuel cell" occurs,
As long as there is enough time before power supply becomes impossible, "sixth-speed running" is prohibited in a situation where the driver does not feel uncomfortable as much as possible.

Next, the case where "insufficient warm-up of the fuel cell" or "detection of system abnormality" is detected will be described. In this routine, if the "insufficient warm-up of the fuel cell" or the "detection of system abnormality" is confirmed in step 120 or step 130 (step 120 OR step 130: "YES"), the processing is performed as described above. In step 150, even if "sixth-speed running" is being executed, "sixth-speed running" is immediately prohibited on the spot, and the processing of this routine is temporarily terminated.

Here, if the occurrence of "detection of system abnormality" is confirmed, torque assist by the electric motor 12 cannot be immediately executed, so that "sixth speed running" must be prohibited on the spot.

Also, when "insufficient warm-up of the fuel cell" is confirmed, the torque assist cannot be executed because the fuel cell 20 is in a state where power generation cannot be continued. However,
Immediately in response to the detection of the "insufficient warming up of the fuel cell", the "sixth-speed running" is prohibited. However, the sudden change in the driving force characteristics during the driving may cause the driver to feel uncomfortable. I can't get it. This is for the following reason.

Since the fuel cell 20 generates heat with power generation,
Once the warm-up is completed and power generation is started, there is no excessive temperature drop as long as power generation is continued. Therefore, the occurrence of the “insufficient warm-up of the fuel cell” can be confirmed in advance at the time of starting the vehicle before traveling, and after the warm-up is completed and “sixth-speed traveling” is once permitted, once again, It is unlikely that there will be a lack of warm-up. Therefore, a situation in which the “sixth speed running” is prohibited in response to the detection of the occurrence of “insufficient warm-up of the fuel cell” during the “sixth speed running” cannot occur.

As described above, in the control device for a hybrid vehicle according to the present embodiment, the following situations that cause a decrease in the output of the electric motor 12, namely, “exceeding the appropriate temperature range of the fuel cell” and “insufficient warm-up of the fuel cell” , "Insufficient fuel in fuel cell" and "detection of system abnormality" are constantly monitored. If any of these situations is detected, the shift from the fifth speed to the sixth speed is prohibited.

However, even if the occurrence of such a situation is detected, there is some margin before the torque assist by the electric motor 12 cannot be executed. (Situation a) The temperature of the fuel cell 20 (“THFC ) Rises to the limited temperature range (“THHi <THFC <THHD”). (Situation b) Although the remaining fuel amount of the fuel cell 20 is not completely exhausted, it decreases to less than a predetermined amount. If only the occurrence of such as is detected, first, as a measure, (Response a) If "6th speed" is not selected at that time,
Shifting to "sixth speed" is prohibited. (Correspondence b) If "sixth speed" is selected at that time, "sixth speed running" is continued there. However, turning on the warning lamp 68 warns the driver that "sixth speed" may be automatically canceled in due course. Such a response is implemented.

On the other hand, (Situation c) The temperature of the fuel cell 20 exceeds the above-mentioned limited temperature range, and the temperature rises further than the upper limit value (“THHD”) of the allowable temperature range. (Situation d) The fuel in the fuel cell 20 runs out. (Situation e) The fuel cell 20 is not sufficiently warmed up. That is, when the temperature of the fuel cell 20 is lower than the lower limit of the allowable temperature range (THL).
o) less than. (Situation f) The occurrence of an abnormality in the system related to the operation of the electric motor 12 has been detected. If the occurrence of a situation where torque assist by the electric motor 12 cannot be immediately performed is detected, in addition to the above (correspondence a), (correspondence c) even if “sixth speed” is currently selected, Then, "6th speed" is forbidden and switched to "5th speed". Such a response is implemented.

As described above, the control device for a hybrid vehicle according to the present embodiment detects the occurrence of a plurality of situations that cause the output of the electric motor 12 to decrease, and takes measures according to the detected situations. Like that. For this reason, when a relatively large torque assist by the electric motor 12 is continuously executed, and a control mode such as the above-mentioned “sixth speed running” is adopted, in which a decrease in output of the electric motor 12 may affect drivability. However, the effects are effectively mitigated.

As described above, according to the control device for a hybrid vehicle of the present embodiment, the following effects can be obtained. (1) In the control device for a hybrid vehicle of the present embodiment,
The engine 10, the electric motor 12, and the automatic transmission 1 are provided in response to detection of a plurality of situations that cause the output of the electric motor 12 to decrease.
3, 14 and power supply units 20, 21
One control content is changed, and a change mode of the control content is switched according to a situation where the occurrence is detected. In addition, the control contents are changed so as to limit the execution of "sixth speed running", which is a control mode that cannot be established unless the operation of the electric motor 12 as a power source is assumed, and the state detected at that time is changed. The change mode of the control content is switched so as to make the restriction mode different according to. As a result, the execution of the specific control mode (“sixth-speed running”) in which the drivability deteriorates due to the decrease in the output of the electric motor 12 is always restricted in an appropriate manner regardless of the situation at that time. Will be able to do it. Therefore, even if the impact on vehicle travel is different for each detected situation,
By taking appropriate measures according to the situation, the effect of the output reduction of the electric motor 12 can be reduced more effectively. As a result, even when the output of the electric motor 12 is reduced, the traveling of the vehicle can be maintained more suitably.

(2) In the control device for a hybrid vehicle according to the present embodiment, the output of the electric motor 12 is reduced, ie, “exceeding the appropriate temperature range of the fuel cell 20”, “insufficient warm-up of the fuel cell 20”, "Fuel shortage of fuel cell 20",
The presence or absence of occurrence of “system abnormality detection” is monitored, and appropriate measures are taken in accordance with each situation in which the occurrence is detected. Therefore, the electric motor 12
It is possible to accurately detect the occurrence of the output decrease, or to accurately predict that it may occur, and to take appropriate measures according to the situation at that time.

(3) In the control device for a hybrid vehicle according to the present embodiment, different measures are taken for each of the detected situations, depending on the degree of influence on the output reduction of the electric motor 12. ing. That is, the response is made different depending on whether there is a time margin from the detection of the occurrence of the above situation to the decrease in the output of the electric motor 12. Therefore, appropriate measures can be taken irrespective of the degree of the output decrease of the electric motor 12 from the detection of the above situation, and the effect of the output decrease of the electric motor 12 can be further reduced. .

(4) In the control device for a hybrid vehicle according to the present embodiment, as the degree of influence on the output reduction of the electric motor 12 increases, the execution of a specific control mode ("sixth speed running") affected by the effect decreases. To increase the degree of restriction. That is, if the degree of influence is large and there is no time margin from the detection of the occurrence of the situation to the decrease in output of the electric motor 12, the execution of the specific control mode ("sixth speed running") is restricted. If the degree of influence is small and there is enough time, the restriction on the execution is relaxed. Therefore, the continuation of the execution of the specific control mode can be maintained as much as possible according to the situation at that time, and the troubles caused by the restriction of the execution of the control mode can be more appropriately avoided, and, as a result, The effect caused by the decrease in the output of the electric motor 12 can be more effectively reduced.

(5) In the control device for a hybrid vehicle according to the present embodiment, if the degree of influence is large and there is no time margin until the output of the electric motor 12 decreases, the specific control mode ("6 Speed running ”) is immediately prohibited. On the other hand, if the degree of influence is small and there is enough time in the above, as a measure for the time being, a transition (switching) to the same control mode ("sixth speed running") is performed.
Only try to ban. Then, after the transition to the specific control mode is prohibited, execution of the control mode is prohibited when the forcible release of the control mode has less influence on traveling. Therefore,
The effect of the forcible release of the control mode on the vehicle running and the driver can be more effectively reduced according to the situation at that time, and the effect of the decrease in the output of the electric motor 12 can be more effectively reduced. Can also be reduced.

(6) In the control device for a hybrid vehicle according to the present embodiment, the fuel cell 20 operates in the limited temperature range (“a predetermined temperature near the upper limit of the allowable temperature range and lower than the upper limit”).
Temperature range from “upper limit of allowable temperature range” to “THH”
i <THFC <THHD ”), it is determined that a situation has occurred in which the degree of influence on the output decrease of the electric motor 12 is small, and the fuel cell 20 also exceeds the allowable temperature range. Under the condition that the temperature further rises ("THFC>THHD"), it is determined that a situation having a large degree of the above-mentioned influence has occurred, and a measure is taken in accordance with the determined degree of the influence. Therefore, it is possible to more accurately grasp the effect of the occurrence of the above-mentioned “out of the appropriate temperature range of the fuel cell 20” on the output reduction of the electric motor 12 according to the temperature of the fuel cell 20 at that time, Appropriate measures can be taken according to the situation at that time.
Incidentally, at the stage before the fuel cell 20 rises in temperature beyond the allowable temperature range, that is, when the temperature rises to the limit temperature range, the execution of the specific control mode ("sixth-speed running") is restricted, By restricting the power supply to the electric motor 12 in advance, it is possible to suppress a further rise in temperature and reduce the occurrence of a rise in temperature that exceeds the allowable temperature range.

(7) In the control device for a hybrid vehicle according to the present embodiment, a condition in which the degree of the above-described influence is large occurs under the condition that the temperature of the fuel cell 20 is lower than the lower limit of the allowable temperature range. Judgment has been made, and appropriate countermeasures are taken in response to the occurrence of such a situation with a large degree of influence. Therefore, the occurrence of "insufficient warm-up of the fuel cell 20" can be accurately detected, and appropriate measures can be taken. Incidentally, since the occurrence of the "insufficient warm-up of the fuel cell 20" can normally be detected in advance at the time of starting the vehicle, even if the occurrence of the occurrence is detected and the execution of the specific control mode is immediately prohibited, the driver may feel uncomfortable. There is little fear.

(8) In the control device for a hybrid vehicle according to the present embodiment, the output of the electric motor 12 is reduced on condition that the fuel in the fuel cell 20 is reduced to a "first predetermined amount" or less. It is determined that a situation in which the degree of influence on the fuel cell 20 is small has occurred. On the other hand, on the condition that the fuel in the fuel cell 20 has been reduced to a “second predetermined amount” less than the “first predetermined amount” or less. Then, it is determined that a situation with a large influence degree has occurred, and a response is made in accordance with the determined influence degree. Therefore, the effect of the occurrence of the “insufficient fuel in the fuel cell 20”, that is, the “insufficient power supply capacity of the power supply device”, on the output reduction of the electric motor 12 depends on the power supply capacity of the fuel cell 20 at that time. It is possible to more accurately understand the situation, and to take appropriate measures according to the situation at that time. Incidentally, in a hybrid vehicle employing the fuel cell 20 as a “power supply device”, the occurrence of the “insufficient power supply capacity of the power supply device” can be accurately grasped from the remaining fuel amount of the fuel cell 20. It is also possible to more easily and more appropriately take appropriate measures according to such a situation.

(9) In the control device for a hybrid vehicle according to the present embodiment, under the condition that an abnormality is detected in the electric motor 12, the fuel cell 20, or the power supply system including these control systems, there is a case where the influence degree is large. Judgment has been made, and appropriate countermeasures are taken in response to the occurrence of such a situation with a high degree of influence. Therefore,
By detecting "occurrence of a system abnormality" that may hinder the operation of the electric motor 12, it is possible to take appropriate measures corresponding to such a situation.

(10) In the hybrid vehicle according to this embodiment, the gear train structure of the gear type transmission mechanism 14 is set to “6th speed” having a particularly small speed ratio, and the vehicle when the “6th speed” is selected. During traveling, the torque assist of the electric motor 12 is increased. Therefore, it is possible to improve the fuel efficiency in high-speed cruising while appropriately mitigating the discomfort caused to the driver by the increase in the shift frequency. In addition, since the required torque during the "sixth-speed running" is ensured by the torque assist of the electric motor 12, the above-described gear train configuration is applied to a hybrid vehicle having a relatively small engine. Will be able to do it. As a result, the fuel efficiency can be further improved.

(11) In the hybrid vehicle according to the present embodiment, a fuel cell 20 capable of more stable power supply is adopted as a “power supply device” for supplying power to the electric motor 12. Accordingly, even in a control mode such as the “sixth-speed running”, which requires relatively large torque assist by the electric motor 12 and may be affected by a decrease in the output of the electric motor 12, it is relatively easy. Can be adopted.

The control device for a hybrid vehicle according to the first embodiment described above can be modified as follows. In the first embodiment, the torque assist characteristic is set so that relatively large torque assist is performed at the time of “sixth-speed running”. However, the setting mode of the torque assist characteristic at each shift speed is arbitrary. For example, the torque assist characteristic may be set such that the same relatively large torque assist is performed for traveling at another specific gear such as “5th speed”. Even in such a case, the execution or switching to the specific gear position set to perform relatively large torque assist is limited by the processing of the “execution determination routine”. In this case, the effects according to the first embodiment can be obtained.

In the above-described embodiment, the sixth-speed gear train configuration is adopted. However, the gear train configuration of the hybrid vehicle is arbitrary, and the torque assist control and the “execution determination routine” according to the above-described embodiment are performed. The control related to running at a specific gear or restricting switching to a specific gear can be similarly applied to a control device of a hybrid vehicle adopting another gear train configuration. In this case, even in such a case, the execution of or the switching to the specific shift speed set to execute the large torque assist is limited by the processing of the “execution determination routine”. In this case, the effects according to the first embodiment can be obtained.

(Second Embodiment) Next, a description will be given of a second embodiment of the hybrid vehicle control device according to the present invention, focusing on differences from the first embodiment.

As described above, in a hybrid vehicle having two power sources, the engine 10 and the electric motor 12, torque assist by the electric motor is more positively performed, and a torque higher than the output of the engine 10 is constantly secured. Thus, it is possible to drive the vehicle with the driving force characteristics higher than usual. In the first embodiment, the vehicle travels at the high gear where the gear ratio is set low ("sixth speed travel").
In this regard, a case has been described in which relatively large torque assist is continuously performed by such an electric motor.

On the other hand, recently, in some vehicles equipped with an automatic transmission, a second shift operation capable of changing a shift position more easily is performed in addition to a normal shift lever operation (first shift operation). Operation system that can perform In a vehicle including such an operation system, each of these shift operations can be switched by a driver's selection.

In the "second shift operation", for example, a shift-up / shift-down operation provided on the steering wheel is performed.
The shift range can be easily and arbitrarily switched by relatively simple operation such as operation of a switch. Therefore, the driver can change the shift range more sporty by selecting the "second shift operation".

[0167] It is considered that such a "second shift operation" is selected when the driver wants to run a sportier vehicle. For this reason, when the "second shift operation" is selected, as in the case of "sixth speed running" in the first embodiment, larger torque assist is performed to enhance the driving force characteristics of the vehicle as compared with the normal case. Then, more sporty traveling according to the driver's request can be provided.

Therefore, the hybrid vehicle control device according to the present embodiment responds to the above-described “second
In the “second shift operation mode” in which the “shift operation of” is selected, the “first shift operation mode” in which the normal shift lever operation is selected is described.
Of the shift operation mode. Hereinafter, torque assist control according to the shift operation mode in the present embodiment will be described with reference to FIG.

FIG. 7 shows an example of setting the torque assist characteristics in each of these shift operation modes. FIG. 7 shows the relationship between the accelerator opening and the engine torque and the total torque when the “second shift operation mode” is selected. Incidentally, in the present embodiment, the “target mode” in FIG. 7 means the “second shift operation mode”, and the “non-selection” of the “target mode” means the “first shift operation”. Mode ”means“ select ”.

In the setting example of FIG. 7, the setting of the torque assist characteristic at the time of selecting each shift operation mode to be switched based on the operation of the shift mode switch 49 by the driver is performed as follows.

<First Shift Operation Mode> In the “first shift operation mode” in which the normal shift position operation is set, the torque assist by the electric motor 12 is relatively small, and only the torque of the engine 10 is mainly used. Running. Since the total torque of the vehicle at this time depends on the engine torque, normal driving force characteristics are secured.

<Second shift operation mode> In the "second shift operation mode" in which a sportier shift range operation is set, torque assist by the electric motor 12 is relatively large. At this time, the execution region of the torque assist and the magnitude of the assisting torque (“torque assist amount”) are set for each shift speed. In this case, the torque assist by the electric motor 12 is performed only in the region where the accelerator opening is medium and high during the "fourth speed" and in the entire region when the "fifth or sixth speed" is performed. In addition, as shown in FIG. 7, the torque assist amount is set to be larger as the vehicle travels at a higher speed, as shown in the example of the torque assist characteristics of “fifth speed traveling” and “sixth speed traveling”.

As a result, when the "second shift operation mode" is selected, suitable driving force characteristics are ensured, and more sporty traveling is allowed. However,
On the other hand, the fuel efficiency is reduced to some extent, and it is not possible to secure high fuel efficiency as usual, but it is possible to reduce the size of the engine as compared to the case where the same driving force characteristics are secured only by the engine. Fuel efficiency can be improved.

As described above, if only the "second shift operation mode" in which the driver demands the driving force characteristics of the vehicle is considered to be high, the larger torque assist can be performed, the normal driving can be performed. The driver's requirements can be satisfied while maintaining high fuel efficiency.

[0175] Even when a control structure for performing relatively large torque assist when such a "second shift operation mode" is selected is employed, the same as in the case of "sixth speed running" in the first embodiment. In addition, a decrease in the output of the electric motor 12 may affect its execution.

Therefore, in the control device according to the second embodiment, the output of the electric motor 12 is controlled based on the processing of the “execution determination routine” in FIG. 6 similarly to the “sixth-speed running” in the first embodiment. The execution of the “second shift operation mode” is restricted according to the detection of the occurrence of the situation that causes the reduction.

In the present embodiment, the “target control” in the flowchart of FIG. 6 refers to the engine 10, the electric motor 12, or the automatic transmission (13) in the “second shift operation mode” described above. , 14). Also in the present embodiment, the execution restriction by the “execution determination routine” is applied to the execution of the “second shift operation mode”. Here, since the control of the “second shift operation mode” may be executed even when the vehicle is stopped,
In the processing of the “execution determination routine” in the present embodiment, the processing of step 170 is also performed without skipping.

As a result, the above (Situation a) and (Situation b)
Until it becomes impossible to perform torque assist as described in
When the occurrence of a situation where there is some margin is detected, the response according to the above (correspondence a) and (correspondence b), that is, (correspondence a ′), the “second shift operation mode” must be selected at that time. For example, switching to the same mode is prohibited. (Correspondence b ') At this time, if the "second shift operation mode" is selected, traveling in the same mode is continued. However, turning on the warning lamp 68 warns the driver that the “second shift operation mode” may be forcibly released in due course. (Response d) According to the response of (Response b '), even if the "second shift operation mode" is allowed to continue in the selected state, if the vehicle is stopped, the same mode is used. Is canceled and the mode is forcibly switched to the “first shift operation mode”. Such a response is implemented.

When the occurrence of a situation in which torque assist cannot be immediately performed as described in the above (Situation c) to (Situation f) is detected, a response in accordance with the above (Response c) is taken. That is, (corresponding c ') Even if the "second shift operation mode" is selected at that time, the mode is immediately canceled and the mode is forcibly switched to the "first shift operation mode". Such a response is implemented.

As described above, also in this embodiment, similarly to the “sixth-speed running” in the first embodiment, the output of the electric motor 12 is reduced in an appropriate manner according to the situation in which the occurrence is detected. Affected "second shift operation mode"
Traveling at is restricted.

According to the hybrid vehicle control apparatus of the present embodiment described above, the effects similar to the above (1) to (9) can be obtained, and further, the following effects can be obtained. .

(12) Further, in the control device for a hybrid vehicle according to the present embodiment, when the degree of influence is small and there is sufficient time, execution of the specific control mode is prohibited (“shift operation mode”). Is performed when the vehicle is stopped. As a result, it is possible to more suitably avoid the influence of the prohibition of the execution of the control mode on the driver. Therefore, the influence of the forcible release of the control mode on the vehicle running and the driver can be more effectively reduced according to the situation at that time.

(13) In the hybrid vehicle according to this embodiment, when the "second shift operation mode" is selected, which is considered to require the driver to travel more sporty, a large torque assist by the electric motor 12 is provided. Is to be implemented. Therefore, it is possible to maintain a high fuel efficiency during normal running without such a request while ensuring a sporty vehicle running according to the driver's request. Since the required torque in the “second shift operation mode” is ensured by the torque assist of the electric motor 12, even in a hybrid vehicle having a relatively small engine, the above-described sporty traveling can be achieved. Can be provided. As a result, the fuel efficiency can be further improved.

(14) In the hybrid vehicle according to the present embodiment, a fuel cell 20 capable of more stable power supply is employed as a "power supply device" for supplying power to the electric motor 12. Therefore, even in a control mode such as the “second shift operation mode”, which requires a relatively large torque assist by the electric motor 12 and may be affected by a decrease in the output of the electric motor 12, It can be adopted relatively easily.

The control system for a hybrid vehicle according to the second embodiment described above can be modified as follows. -The setting mode of the torque assist characteristic in the second embodiment is arbitrary, and when the "second shift operation mode", which is considered to require a sporty vehicle running, is selected, the request can be met. If a larger torque assist can be performed, the torque assist characteristic may be set in any mode.

In the above embodiment, as a specific control mode in which a larger torque assist is performed and the execution is restricted by the processing of the “execution determination routine”, the shift range changing operation can be performed more easily. Although the “second shift operation mode” is set, a vehicle that can switch the operation (“shift operation mode”) related to the change of the shift range and the gear position that is different from that of the above embodiment is similar to the above embodiment. It is also possible to apply the setting of the torque assist characteristic and the restriction on the execution of a specific control mode by the “execution determination routine”. For example, the present invention can be applied to a vehicle capable of switching between a shift operation mode in which a normal shift range switching operation is performed and a shift operation mode in which a single shift stage is changed by manual operation. The point is that when selecting the shift operation mode in which it is considered that more sporty vehicle traveling is required, the “second
By setting the torque assist characteristic according to the selection of the “shift operation mode” and restricting the execution of the shift operation mode in a manner according to the “execution determination routine”, the second embodiment is followed. The effect can be obtained.

(Third Embodiment) Next, a third embodiment of the hybrid vehicle control device according to the present invention will be described focusing on differences from the first and second embodiments.

Conventionally, in a vehicle equipped with an automatic transmission,
There is a type in which a driver can select a driving mode ("power driving mode") suitable for driving on an uphill road or the like that requires a higher driving torque than normal, instead of the normal driving mode. In a vehicle that adopts such a “power drive mode”, the power transmission system is usually changed in accordance with the selection of the “power drive mode”, for example, by changing the conditions for switching the gear position of the automatic transmission or executing the lockup. By appropriately changing the control content, a higher driving torque is ensured even under the same vehicle speed condition.

By the way, in the case of the hybrid vehicle having the two power sources as described above, a high driving torque required when the “power running mode” is selected can be secured by the torque assist of the electric motor 12. That is, if the torque assist of the electric motor 12 is increased when the “power running mode” is selected, the automatic transmission 1
The sum of the input torques of 3, 14 ("total torque") is further increased, so that a higher drive torque is ensured.

Therefore, in the present embodiment, the "normal running mode" and the "power running mode" can be selectively switched based on the operation of the power mode changeover switch 50 by the driver. When the "running mode" is selected, the torque assist is performed in the manner illustrated in FIG. 7, as in the case of selecting the "second shift operation mode" in the second embodiment. Incidentally, in the present embodiment, the “target mode” in FIG. 7 indicates the “power running mode”, and “non-selection” of the “target mode” means “selection” of the “normal driving mode”. Means

Even in the case where such a control structure as to perform a large torque assist when the "power running mode" is selected is adopted, the "6th speed running" and the "second speed running" in the first or second embodiment are also used. As in the case of selecting the “shift operation mode”, a decrease in the output of the electric motor 12 may affect its execution.

Therefore, in the control device of the third embodiment, similarly to the first and second embodiments, the electric motor 12 is controlled based on the processing of the "execution determination routine" of FIG.
The execution restriction of the "power running mode" is performed in accordance with the detection of the occurrence of the situation that causes the output to decrease. In the present embodiment, the “target control” in FIG. 6 corresponds to the control related to the traveling in the “power traveling mode” that requires a larger torque assist of the electric motor 12 as described above.

Also, in the present embodiment, the second
Similarly to the “second shift operation mode” in the embodiment, the traveling in the “power traveling mode” that may be affected by the decrease in the output of the electric motor 12 is performed in a manner corresponding to the situation where the occurrence is detected. Limited.

According to the control apparatus for a hybrid vehicle of the present embodiment described above, the above (1) to (9) and (12)
And the effects described below can be further obtained.

(15) In the hybrid vehicle according to the present embodiment, when the "power running mode" requiring a larger driving torque is selected, a larger torque assist by the electric motor 12 is performed. Therefore, it is possible to maintain high fuel efficiency when selecting the "normal running mode", which does not require such, while securing the required driving torque. In addition, since the required torque at the time of selecting the “power running mode” is covered by the torque assist of the electric motor 12, even in a hybrid vehicle having a relatively small engine, necessary driving torque can be secured, As a result, the fuel efficiency can be further improved.

(16) In the hybrid vehicle according to the present embodiment, a fuel cell 20 capable of more stable power supply is adopted as a “power supply device” for supplying power to the electric motor 12. Therefore, even in a control mode such as the above-mentioned “power running mode” which requires a larger torque assist by the electric motor 12 and may be affected by a decrease in the output of the electric motor 12, it is relatively easy. Can be adopted.

The control device for a hybrid vehicle according to the third embodiment described above can be modified as follows. -The setting mode of the torque assist characteristic in the third embodiment is arbitrary, and when the "power drive mode" is selected,
If a larger torque assist can be performed, the torque assist characteristic may be set in any mode.

In a vehicle equipped with an automatic transmission,
Based on the relative relationship between the vehicle speed and the throttle opening, it is determined that the vehicle is traveling on an uphill road, and high driving force characteristics are secured by, for example, restricting switching to a high-speed side gear. There is something to do. For example, during the execution of the "uphill road control", a driving force characteristic higher than usual may be required other than when the "power running mode" is selected. Therefore, during execution of a specific control mode requiring such high driving force characteristics other than when the “power running mode” is selected, the torque assist by the electric motor 12 is positively activated in a manner similar to that when the “power running mode” is selected. May be set. If the execution of such a specific control mode is limited in a manner according to the “execution determination routine”, an effect similar to that of the third embodiment can be obtained.

(Fourth Embodiment) Next, a description will be given of a fourth embodiment of the hybrid vehicle control apparatus according to the present invention, focusing on differences from the first to third embodiments.

Conventionally, in some vehicles equipped with a gasoline engine as a heat engine, the air-fuel ratio of the air-fuel mixture sucked into the cylinder becomes leaner than the normal stoichiometric air-fuel ratio, for example, during low load operation. As described above, the combustion method is changed to control the switching of the combustion method to improve the specific heat ratio and reduce the cooling loss.

An engine that switches between combustion at such a stoichiometric air-fuel ratio ("stoichiometric combustion") and combustion at a leaner air-fuel ratio ("lean combustion") than in "stoichiometric air-fuel ratio combustion" Since the maximum output decreases, it may be difficult to secure a driving torque according to the running conditions during "lean combustion". In addition, the presence of a torque step for each combustion method may cause inadvertent fluctuations in the driving force characteristics of a running vehicle, and may cause problems such as deterioration in drivability.

In the case of a hybrid vehicle having two power sources as described above, the decrease in engine torque required for switching the combustion mode is complemented by the torque assist of the electric motor, so that such a shortage of drive torque or torque The occurrence of a step can be eliminated. Therefore, in the hybrid vehicle control device of the present embodiment, by performing the torque assist by the electric motor 12 more aggressively at the time of "lean combustion", a constant driving force characteristic can be always obtained regardless of the combustion method. ing.

FIG. 8 shows an example of setting the torque assist characteristics according to such a combustion system. In the setting example of FIG. 8,
At the time of "fifth speed running" and "sixth speed running", the torque assist by the electric motor 12 is executed irrespective of the combustion method selected at that time. However, at the time of "lean combustion", the torque assist amount is increased by an amount corresponding to the decrease in the engine torque due to the switching of the combustion method, and as a result, regardless of the combustion method, the sum of the torques input to the automatic transmissions 13 and 14 ("total" Torque)).

Even in the present embodiment, running in "lean combustion" requires relatively large torque assist, and may be affected by a decrease in the output of the electric motor 12.

Therefore, in the present embodiment, the execution of the running in the "lean combustion" is restricted by the processing of the "execution determination routine" shown in FIG. Like that. In the present embodiment, the “target control” in FIG. 6 corresponds to the control relating to the running in “lean combustion” requiring relatively large torque assist as described above.

In the present embodiment, the second
Similarly to the “second shift operation mode” in the embodiment, traveling in “lean combustion” affected by a decrease in the output of the electric motor 12 is restricted in a manner corresponding to a situation in which occurrence is detected.

According to the control apparatus for a hybrid vehicle of the present embodiment described above, the above (1) to (9) and (12)
In addition to the effects similar to the effects described in (1), the following effects can be obtained.

(17) In the hybrid vehicle according to the present embodiment, a larger torque assist by the electric motor 12 is performed at the time of "lean combustion" in order to absorb a difference in engine torque for each combustion method. I have.
Therefore, it is possible to reduce or eliminate the difference in the driving force characteristics for each combustion system, and to reduce or prevent the torque step involved in switching.

(18) In the hybrid vehicle according to the present embodiment, a fuel cell 20 capable of more stable power supply is employed as a “power supply device” for supplying power to the electric motor 12. Therefore, even in the control mode for running at the time of the above-mentioned "lean combustion", which requires a relatively large torque assist by the electric motor 12, and therefore may be affected by a decrease in the output of the electric motor 12, It can be easily adopted.

[0210] The control device for a hybrid vehicle according to the fourth embodiment described above can be modified as follows. The setting mode of the torque assist characteristic in the fourth embodiment is arbitrary. If the engine 10 can perform more aggressive torque assist during running in "lean combustion", the torque assist characteristic may be set in any manner. May be set.

In the above embodiment, the case where the combustion mode of the engine 10 is switched between "stoichiometric air-fuel ratio combustion" and "lean combustion" has been described. Even in a hybrid vehicle provided with the electric motor 12, torque assist by the electric motor 12 may be performed so as to make up the difference in engine output for each combustion method. If the travel in the specific combustion mode in which relatively large torque assist is performed is restricted in a manner according to the “execution determination routine”, an effect similar to that in the fourth embodiment can be obtained. Can be.

In the above embodiment, the case where the torque assist by the electric motor is performed to compensate for the decrease in the output of the engine due to the switching of the combustion method has been described. However, the torque assist is performed in a situation where the output of the engine is reduced by other factors. You may make it. For example, at high altitudes where the atmospheric pressure is low, the amount of oxygen supplied to the engine decreases, and the engine output decreases. Therefore, if the altitude or atmospheric pressure is detected and the altitude is high or the atmospheric pressure is low, torque assist by an electric motor is performed to compensate for the decrease in engine output. Driving characteristics can be secured. If the execution of such torque assist is restricted in a manner according to the above “execution determination routine”, the effects described in the above (1) to (9) and (12) can also be obtained.

(Other Embodiments) Next, modifications of the control device for a hybrid vehicle of each of the above embodiments will be listed below.

In each of the above embodiments, a large torque assist by the electric motor 12 is required, and the control mode “6-speed” which cannot be established unless the electric motor 12 operates as a power source is assumed. Traveling ”,“ second shift operation mode ”,“ power traveling mode ”, and the engine 1
Although running in "lean combustion" of 0 is set as the specific control mode, any other control mode may be set as the specific control mode. If the travel in the control mode set in this way is restricted in a manner similar to the above-described embodiments, the same effects as in the above-described embodiments can be obtained.

The control mode set as the specific control mode need not necessarily be a control mode that cannot be established unless the operation of the electric motor 12 as a power source is assumed. In short, if the traveling in the specific control mode set in this way causes any trouble due to the influence of the decrease in the output of the electric motor 12, the traveling in the specific control mode is in accordance with each of the above embodiments. The effect can be appropriately mitigated according to the situation at that time.

In each of the above embodiments, when the “over the appropriate temperature range of the fuel cell” occurs, the temperature of the fuel cell 20 (“T
HFC)) (a) limited temperature range (“THHi <THFC <THH
D ”). (B) When the temperature rises above the upper limit value ("THHD") of the allowable temperature range. Then, the subsequent correspondence (change mode of the control content) is switched. The switching condition for changing the control content may be set in accordance with the rate of increase in the temperature of the fuel cell 20. For example, when the rate of temperature rise of the fuel cell 20 is high, the lower limit value (“THH
If i)) is set lower and the power supply to the fuel cell 20 is restricted relatively early, it is possible to more effectively suppress a further rise in temperature.

Also, the continuity of power supply of the fuel cell 20 thereafter, that is, the operating frequency of the electric motor 12 and the electric motor 12
The power consumption degree according to the amount of torque assist due to the power consumption may be predicted, and the switching condition of the change mode of the control content at the time of the occurrence of “above the appropriate temperature range of the fuel cell” may be changed. For example, when it is predicted that the continuity of the power supply of the fuel cell 20 thereafter is low, the lower limit value (“THHi”) of the limited temperature range is set to be higher, and the power supply of the fuel cell 20 is set to be lower. Is not restricted until relatively late, normal traveling can be continued longer.

In each of the above embodiments, the detection of the occurrence of “over the appropriate temperature range of the fuel cell”, “insufficient fuel of the fuel cell”, “insufficient warm-up of the fuel cell”, and “detection of occurrence of system abnormality” Although the configuration for detecting the occurrence of a situation that may cause a decrease in the output of the electric motor 12 has been described, it is arbitrarily determined under what circumstances the occurrence of the above-described decrease in the output is likely to occur. In short, by detecting the occurrence of a situation that may cause such a decrease in output, and switching the subsequent response according to the detected situation, that is, by changing the control content change mode, it is possible to respond to the situation at that time. In addition, appropriate measures can be taken, and the effect can be effectively reduced.

In each of the above embodiments, the timing of changing the control content is switched between the time when the occurrence is detected and the time when the vehicle is stopped after the detection according to the situation where the occurrence is detected. The present invention is not limited to this, and the control content change timing may be switched to a plurality of arbitrary timings according to the situation at that time. If there is enough time before the output of the electric motor 12 is reduced in the situation where the occurrence is detected at that time, the change is waited for when the change in the control content has less influence on the running. If the time is not enough, if the change is made earlier, it is possible to improve the continuity of the normal control and to prevent problems such as torque shock related to the change of the control content. Reduction can be achieved more effectively.

In each of the above embodiments, if there is a time margin from the detection of the occurrence of the above situation to the decrease in the output of the electric motor 12, the setting is made so that the electric motor 12 actively assists the torque. Switching to the specified control mode, that is, “sixth speed running”, “second shift operation mode”, “power running mode”, and “lean combustion” of the engine 10 is prohibited there, and when the vehicle is stopped, the specific Although the control mode is forcibly released, it is also possible to prohibit only the switching and not to perform the forcible release as long as there is a margin. Even in such a case, the traveling in the specific control mode can be continued as long as the situation at that time permits.

Further, by means other than prohibiting the switching of the specific control mode or forcibly canceling the control mode, a response (change of the control content) may be performed in response to the detection of the occurrence of the situation. For example, the torque assist characteristic when such a specific control mode is selected may be changed so that the torque assist amount is reduced. Then, by appropriately setting the reduction amount of the torque assist amount in accordance with the degree of output reduction of the electric motor 12 for each situation in which the occurrence is detected, appropriate measures are taken according to the situation at that time. , The effect of the output drop can be effectively reduced.

Further, the change of the control content in response to the detection of the occurrence of the above-mentioned situation is not limited to the above-described specific control mode, and the control of the hybrid system including the engine 10, the electric motor 12, the automatic transmissions 13 and 14, etc. May be applied. That is, if the control content of such a hybrid system is appropriately changed in accordance with the situation in which the occurrence is detected, for example, the required driving torque can be secured by optimal means according to the situation at that time. And the effect of the output reduction can be effectively reduced.

In each of the above embodiments, the fuel cell 2 is mainly used as a power supply for supplying electric power to the electric motor 12.
Although the configuration adopts 0, it may be changed to an arbitrary power supply device such as a secondary battery (“battery”). When a secondary battery is used as a power supply device, the power supply capacity of the power supply device is grasped from the amount of stored power,
It is possible to determine the degree of influence on the output reduction of the electric motor 12.

The configuration of the hybrid vehicle to which the control device according to each of the above embodiments is applied is also arbitrary. In short, a hybrid vehicle including two power sources, a heat engine and an electric motor, a drive transmission system that transmits the output of these power sources to drive wheels, and a power supply device that supplies electric power to the electric motor, may be any of the above-described vehicles. By applying the control device according to the embodiment, it is possible to cope with a decrease in the output of the electric motor according to the situation at that time, and to effectively reduce the effect.

[Brief description of the drawings]

FIG. 1 is a schematic diagram schematically showing a configuration of a hybrid system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of a control system of the embodiment.

FIG. 3 is a schematic diagram showing an example of setting an operation area of a power source.

FIG. 4 is a schematic diagram showing a setting example of a switchable gear position for each shift position.

FIG. 5 is a schematic diagram showing a setting example of a torque assist characteristic of the first embodiment.

FIG. 6 is a flowchart illustrating a determination procedure according to a target control restriction process.

FIG. 7 is a schematic diagram showing a setting example of a torque assist characteristic of a second embodiment of the present invention.

FIG. 8 is a schematic diagram showing a setting example of a torque assist characteristic of a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Engine ("heat engine"), 12 ... Main motor / generator (main M / G: "Electric motor"), 13 ... Torque converter, 14 ... Gear type transmission mechanism, 16 ... Drive wheels, 2
0: fuel cell, 21: secondary battery, 30: ECU (electronic control device), 40: FC temperature sensor, 41: FC fuel remaining amount sensor, 60: main M / G control device, 63: power switch, 65 ... electronic throttle device, 66 ... igniter,
67 ... injector, 68 ... warning light, 62 ... AT line pressure control solenoid, 69 ... clutch control solenoid, 7
0: Lock-up control solenoid, 71: Solenoid.

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) BA19 CA01 CA03 DA06 DA09 DB00 DB05 DB09 EA02 EA05 EA09 EA13 EB03 EC01 FA07 FB01 5H115 PA12 PG04 PI16 PI18 PU01 PU25 QE04 RB08 RE05 SE04 SE05 SJ12 TB01 TE02 TE03 TE06 TI02 TI10 TO08 TO21 TR19 TZ07

Claims (15)

[Claims] 1. A power source comprising: a heat engine and an electric motor;
In a control device for a hybrid vehicle including a power transmission system for transmitting the outputs of these power sources to drive wheels and a power supply device for supplying power to the electric motor, a condition that causes a decrease in the output of the electric motor is detected. A changer that changes the control content of at least one of the heat engine, the electric motor, the power transmission system, and the power supply in accordance with the detection of the occurrence of the situation by the detector. A control device for a hybrid vehicle, comprising: a change mode switching unit that switches a change mode of control content by a change unit in accordance with a situation in which occurrence is detected by the detection unit. 2. The control device for a hybrid vehicle according to claim 1, wherein at least one of the heat engine, the electric motor, the power transmission system, and the power supply device is different when the hybrid vehicle travels. Control mode switching means for selectively switching between a plurality of control modes is further provided, wherein the change means is configured to detect execution of a specific control mode among the plurality of control modes switched by the control mode switching means. Wherein the control mode is changed so as to limit the control mode according to the detection of the occurrence of the situation, and the change mode switching means changes the specific control mode in accordance with the situation in which the occurrence is detected by the detection means. The change mode of the change unit is switched so that the execution restriction mode is changed. The control device of the hybrid vehicle. 3. The control device for a hybrid vehicle according to claim 2, wherein the specific control mode whose execution is restricted by said change means is established unless the electric motor is assumed to operate as a power source. A control device for a hybrid vehicle, wherein the control mode is a control mode that cannot be obtained. 4. The control apparatus for a hybrid vehicle according to claim 1, wherein said change mode switching means has an effect on a decrease in output of said electric motor in a situation in which occurrence is detected by said detection means. A control device for a hybrid vehicle, wherein a change mode of a control content by the change unit is switched according to a degree. 5. The control device for a hybrid vehicle according to claim 2, wherein the change mode switching means has a large degree of influence on a decrease in output of the electric motor in a situation where the occurrence is detected by the detection means. A control device for a hybrid vehicle, wherein a change mode of the control content by the change unit is switched so that the degree of restriction on execution of the specific control mode increases. 6. The control device for a hybrid vehicle according to claim 5, wherein the change mode switching means controls the specific control mode when the degree of influence of the situation detected by the detection means is large. Is immediately prohibited, and when the degree of the effect is small, the mode of change of the control content by the change means is switched so as to prohibit the transition from the control mode other than the specific control mode to the specific control mode. A control device for a hybrid vehicle, comprising: 7. The control device for a hybrid vehicle according to claim 6, wherein the change mode switching unit is configured to control whether the degree of influence of the situation detected by the detection unit is small and the vehicle is stopped. For example, a control device for a hybrid vehicle, wherein a change mode of the control content by the change means is switched so as to prohibit the control in the specific control mode. 8. The control device for a hybrid vehicle according to claim 4, wherein said detecting means detects the occurrence of said condition based on at least a temperature of said power supply device. The mode switching unit may be configured to determine whether or not the control content is changed by the changing unit when the temperature of the power supply becomes equal to or higher than a predetermined value lower than the upper limit near the upper limit of the allowable temperature range of the power supply by the detector. Is switched to a change mode when the degree of influence is smaller on the condition that the occurrence of the power supply is detected, and the occurrence of a situation in which the temperature of the power supply becomes equal to or higher than the upper limit of the allowable temperature range of the power supply by the detection means. Is switched to a change mode when the degree of influence is greater on the condition that the vehicle is detected. . 9. The control device for a hybrid vehicle according to claim 4, wherein said detecting means detects the occurrence of said situation based on at least a temperature of said power supply device, and The mode switching unit sets the mode of change of the control content by the changing unit on the condition that the occurrence of a situation where the temperature of the power supply device is equal to or lower than the lower limit value of the allowable temperature range of the power supply device is detected by the detection unit. A control apparatus for a hybrid vehicle, wherein the control mode is switched to a change mode when the degree of influence is larger. 10. The control device for a hybrid vehicle according to claim 4, wherein said detecting means detects the occurrence of said condition based on at least a power supply margin of said power supply device, The change mode switching means sets the change mode of the control content by the change means on the condition that the occurrence of a situation in which the power supply surplus of the power supply device has decreased to a first predetermined amount or less is detected by the detection means. Switching to the change mode when the degree of influence is smaller is performed, and the occurrence of a situation where the power supply remaining power of the power supply device is reduced to a second predetermined amount less than the first predetermined amount is detected by the detection unit. A control device for a hybrid vehicle, which switches to a change mode when the degree of influence is greater on the condition that 11. The control device for a hybrid vehicle according to claim 10, wherein said power supply device is a fuel cell, and said detecting means is based on at least a power supply reserve grasped from a remaining fuel amount of said fuel cell. A control device for a hybrid vehicle, which detects occurrence of the situation. 12. The control device for a hybrid vehicle according to claim 4, wherein said detecting means detects the occurrence of said condition based on at least detection of an abnormality in a power supply system. The mode switching unit may change the control content change mode by the change unit to a change mode when the degree of influence is larger on condition that the detection unit detects the occurrence of a situation in which an abnormality of the power supply system is detected. A control device for a hybrid vehicle, wherein the control device switches. 13. The control apparatus for a hybrid vehicle according to claim 1, wherein said change mode switching means changes a control content change timing according to a situation in which occurrence is detected by said detection means. A control device for a hybrid vehicle, wherein a change mode by the change means is switched so as to cause the change. 14. The hybrid vehicle control device according to claim 13, wherein the change mode switching means stops the vehicle at the time of detection and after the detection in accordance with a situation in which the occurrence is detected by the detection means. A control device for a hybrid vehicle, wherein a change mode of the change means is switched so that a change timing of the control content is different from a time when the control content is changed. 15. The control device for a hybrid vehicle according to claim 1, wherein said detecting means includes at least a temperature rise of said power supply device.
A control device for a hybrid vehicle, which detects occurrence of a plurality of situations including insufficient warm-up of the power supply device, decrease in power supply capacity of the power supply device, and detection of abnormality in a power supply system.