JP2008174051A - Vehicle air conditioner and control method thereof - Google Patents

Abstract

A vehicle air conditioner capable of executing an automatic air conditioning control that keeps the temperature in a vehicle interior at a set temperature, and to save energy without forcing a user to perform complicated operations.
In a hybrid vehicle having an air conditioning unit, a refrigeration cycle is provided if an A / C auto switch is turned on and an ECO switch is turned off when the A / C on / off switch is turned off. If the ECO switch 88 is turned on when the A / C auto switch 103 is turned on and the A / C on / off switch 101 is turned off, the compressor 95 constituting 93 is permitted to operate (step S140). 95 is prohibited (step S150).
[Selection] Figure 2

Description

  The present invention relates to a vehicle air conditioner that air-conditions a passenger compartment of a vehicle and a control method thereof.

2. Description of the Related Art Conventionally, as this type of vehicle air conditioner, one that can automatically control the temperature and air volume of conditioned air that is blown into a vehicle interior is known (see, for example, Patent Document 1). In this vehicle air conditioner, when the air suction mode is the outside air mode and the vehicle speed is equal to or higher than a predetermined value, it is determined that the air conditioning heat load is equal to or lower than the predetermined amount, and the blower and the refrigeration for blowing air into the vehicle interior The compressor constituting the cycle is stopped, thereby suppressing wasteful energy consumption. Conventionally, as an air conditioner for a hybrid vehicle that stops a traveling engine if the battery charge is sufficient when the vehicle speed is equal to or lower than a predetermined vehicle speed, the air conditioning state in the passenger compartment is a cool that places importance on comfort. A switchable between a mode and an economy mode that places importance on fuel economy is also known (see, for example, Patent Document 2). In this air conditioner, when the air conditioning state in the passenger compartment is switched to the economy mode, the operating rate of the refrigerant compressor is lowered as the vehicle speed is slower, thereby making it easier to stop the traveling engine. Furthermore, as a heat pump air conditioning dehumidifier for an electric vehicle, an operation mode setting unit that is operated by a user to set an operation mode of the number of rotations of the electric compressor is provided, and when the operation mode setting unit is operated, the electric motor compressor Are known that reduce the number of rotations or limit the upper limit of the number of rotations (see, for example, Patent Document 3). Conventionally, there is also known a vehicle that has a normal mode and an energy saving mode as operation modes, and can arbitrarily select either the normal mode or the energy saving mode (see, for example, Patent Document 4). . In this vehicle, it is possible to collectively give a switching instruction between the normal mode and the energy saving mode to a plurality of devices such as an engine, a regenerative braking unit, an automatic transmission, and an air conditioner by operating the eco switch. .
JP 2006-224705 A JP-A-11-180137 Japanese Patent Laid-Open No. 08-156580 JP 2006-151039 A

  The automatic air-conditioning control for keeping the temperature in the passenger compartment at the set temperature or the like is generally executed when a predetermined switch is operated, and basically constitutes a refrigeration cycle during the execution. The compressor is activated. Therefore, even if the compressor is stopped appropriately as in the technique described in Patent Document 1, the compressor is operated wastefully, especially against the intention of the user who desires energy saving of the vehicle rather than the air conditioning performance. There is a risk of wasting money. In this case, it is conceivable that the operation mode setting means described in Patent Document 2 is provided in the vehicle air conditioner. However, the automatic air conditioning control basically obtains a comfortable cabin environment with few switch operations. Even if such an operation mode setting means is provided in the vehicle air conditioner, the user who wants to save energy in the vehicle is forced to perform a complicated operation.

  Therefore, the vehicle air conditioner and the control method thereof according to the present invention impose a complicated operation on the user in the vehicle air conditioner capable of performing the automatic air conditioning control that keeps the temperature in the passenger compartment at the set temperature. The purpose is to save energy.

  The vehicle and the control method thereof according to the present invention employ the following means in order to achieve the above-described object.

A vehicle air conditioner according to the present invention is a vehicle air conditioner that air-conditions a vehicle cabin provided with an energy saving mode selection switch for selecting an energy saving mode that prioritizes energy saving,
A refrigeration cycle including a compressor driven by a predetermined drive source;
An automatic air-conditioning selection switch for selecting execution of automatic air-conditioning control to keep the temperature in the vehicle interior at a set temperature;
An air conditioning execution instruction switch for instructing execution of air conditioning of the passenger compartment accompanied by operation of the compressor;
If the energy saving mode selection switch is off when the automatic air conditioning selection switch is turned on and the air conditioning execution instruction switch is off, the compressor is allowed to operate, and the automatic air conditioning selection switch is on. Control means for prohibiting the operation of the compressor if the energy saving mode selection switch is turned on when the air conditioning execution instruction switch is turned off,
Is provided.

  In this vehicle air conditioner, the operation of the compressor is allowed if the automatic air conditioning selection switch is turned on and the energy saving mode selection switch is turned off when the air conditioning execution instruction switch is turned off. If the energy saving mode selection switch is on when the air conditioning execution instruction switch is off and the air conditioning execution instruction switch is off, the operation of the compressor is prohibited. That is, in this vehicle air conditioner, when the energy saving mode selection switch of the vehicle is turned off, the compressor is operated only by turning on the automatic air conditioning selection switch regardless of the on / off state of the air conditioning execution instruction switch. Automatic air conditioning control is executed. On the other hand, when the energy saving mode selection switch of the vehicle is turned on, unless the air conditioning execution instruction switch is separately turned on, the operation of the compressor is prohibited even if the automatic air conditioning selection switch is turned on. Thus, the automatic air conditioning control without the operation of is executed. Therefore, in this vehicle air conditioner, if the energy saving mode selection switch of the vehicle is turned on, the operation of the compressor when the automatic air conditioning selection switch is turned on is suppressed, so that the air conditioning performance slightly decreases. Since it is possible to eliminate energy consumption associated with driving the compressor, energy saving can be achieved without forcing the user to perform complicated operations.

  In this case, the vehicle may include power storage means, and the drive source of the compressor may be an electric motor that operates with electric power from the power storage means. When such a compressor is used, the operation of the compressor is prohibited if the automatic air-conditioning selection switch is turned on and the energy-saving mode selection switch is turned on when the air-conditioning execution instruction switch is turned off. As a result, although the air-conditioning performance is slightly lowered, it is possible to eliminate the power consumption by the electric motor that drives the compressor and to save the energy of the vehicle air-conditioning apparatus and thus the vehicle.

  The vehicle may include an internal combustion engine capable of outputting power, and the drive source of the compressor may be the internal combustion engine. When such a compressor is used, the operation of the compressor is prohibited if the automatic air-conditioning selection switch is turned on and the energy-saving mode selection switch is turned on when the air-conditioning execution instruction switch is turned off. As a result, although the air-conditioning performance is slightly reduced, it is possible to reduce the burden on the internal combustion engine that drives the compressor, that is, the fuel consumption, and to save energy for the vehicle air-conditioning apparatus and thus the vehicle.

  Further, the energy saving mode selection switch of the vehicle collectively indicates that the energy saving mode is selected for a plurality of vehicle-related devices controlled under the energy saving mode including the vehicle air conditioner. May be used. Thus, if the energy saving mode selection switch is turned on, a plurality of vehicle-related devices including the vehicle air conditioner can be controlled under the energy saving mode. Eliminates the need for complicated operations.

The control method for a vehicle air conditioner according to the present invention selects a refrigeration cycle including a compressor driven by a predetermined drive source and execution of automatic air conditioning control that keeps the temperature in the passenger compartment at a set temperature. And an air conditioning execution instruction switch for instructing execution of air conditioning of the passenger compartment accompanying the operation of the compressor, for selecting an energy saving mode that prioritizes energy saving A control method for a vehicle air conditioner that air-conditions a passenger compartment of a vehicle having an energy saving mode selection switch,
If the energy saving mode selection switch is turned off when the air conditioning execution instruction switch is turned off and the automatic air conditioning selection switch is turned on, the compressor is allowed to operate, and the air conditioning execution instruction switch is turned off. In addition, if the energy saving mode selection switch is turned on when the automatic air conditioning selection switch is turned on, the operation of the compressor is prohibited.

  Under this method, when the energy saving mode selection switch of the vehicle is turned off, the automatic air conditioning selection switch is turned on only when the automatic air conditioning selection switch is turned on regardless of the on / off state of the air conditioning execution instruction switch. Air conditioning control is executed. On the other hand, when the energy saving mode selection switch of the vehicle is turned on, unless the air conditioning execution instruction switch is separately turned on, the operation of the compressor is prohibited even if the automatic air conditioning selection switch is turned on. Thus, the automatic air conditioning control without the operation of is executed. Therefore, if the energy saving mode selection switch of the vehicle is turned on, the operation of the compressor when the automatic air conditioning selection switch is turned on is suppressed, so that the air conditioning performance is slightly reduced, but the energy accompanying the driving of the compressor is reduced. Since consumption can be eliminated, according to this method, energy saving can be achieved without forcing the user to perform complicated operations.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a schematic configuration diagram of a hybrid vehicle 20 including a vehicle air conditioner according to an embodiment of the present invention. The hybrid vehicle 20 shown in the figure is connected to an engine 22, a three-shaft power distribution and integration mechanism 30 connected to a crankshaft that is an output shaft of the engine 22 via a damper (not shown), and the power distribution and integration mechanism 30. A motor MG1 that can generate electricity, a motor MG2 that is connected to the power distribution and integration mechanism 30 via a reduction gear or a transmission (not shown), and an air conditioning unit (air conditioning) that air-conditions (cools and heats) a vehicle compartment (not shown). A vehicle air conditioner) 90, a hybrid electronic control unit (hereinafter referred to as “hybrid ECU”) 70 that controls the entire hybrid vehicle 20, and the like.

  The engine 22 is an internal combustion engine that outputs power by being supplied with hydrocarbon fuel such as gasoline or light oil, and an engine electronic control unit (hereinafter referred to as “engine ECU”) 24 performs fuel injection amount, ignition timing, Control of intake air volume etc. The engine ECU 24 receives signals from various sensors that are provided for the engine 22 and detect the operating state of the engine 22. The engine ECU 24 communicates with the hybrid ECU 70 to control the operation of the engine 22 based on a control signal from the hybrid ECU 70, a signal from the sensor, and the like, and to transmit data on the operation state of the engine 22 as necessary. It outputs to ECU70.

  The power distribution and integration mechanism 30 includes, for example, an external gear sun gear 30a, an internal gear ring gear 30b disposed concentrically with the sun gear 30a, a plurality of pinion gears 30c that mesh with the sun gear 30a and mesh with the ring gear 30b. A planetary gear mechanism is provided that includes a carrier 30d that holds a plurality of pinion gears 30c so as to rotate and revolve, and that performs differential action using the sun gear 30a, the ring gear 30b, and the carrier 30d as rotating elements. The crankshaft of the engine 22 is connected to the carrier 30d as the engine side rotation element, the motor MG1 is connected to the sun gear 30a, and the ring gear 30b as the axle side rotation element is connected to the motor MG2 (connected to the motor MG2) via the ring gear shaft 32. A reduction gear or a transmission) is connected to each other. The power distribution and integration mechanism 30 distributes the power from the engine 22 input from the carrier 30d to the sun gear 30a side and the ring gear 30b side according to the gear ratio when the motor MG1 functions as a generator, and the motor MG1 is an electric motor. , The power from the engine 22 input from the carrier 30d and the power from the motor MG1 input from the sun gear 30a are integrated and output to the ring gear 30b side. The power output to the ring gear 30b is finally output to the wheels 39a and 39b, which are drive wheels, from the ring gear shaft 32 as the drive shaft via the differential gear 38 and the like.

  Each of the motors MG1 and MG2 is configured as a known synchronous generator motor that operates as a generator and can operate as a motor, and exchanges power with the battery 50 that is a secondary battery via inverters 41 and 42. . The power line connecting the inverters 41 and 42 and the battery 50 is configured as a positive bus and a negative bus shared by the respective inverters 41 and 42, and the power generated by one of the motors MG1 and MG2 is supplied to the other. It can be consumed with a motor. Therefore, the battery 50 is charged / discharged by the electric power generated from one of the motors MG1 and MG2 or the insufficient electric power. If the electric power balance is balanced by the motors MG1 and MG2, the battery 50 is charged. It will not be discharged. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as “motor ECU”) 40. The motor ECU 40 receives signals necessary for driving and controlling the motors MG1 and MG2, such as a signal from a rotational position detection sensor (not shown) for detecting the rotational position of the rotor of the motors MG1 and MG2, and a current sensor (not shown). The detected phase current applied to the motors MG1 and MG2 is input, and the motor ECU 40 outputs a switching control signal and the like to the inverters 41 and 42. Further, the motor ECU 40 communicates with the hybrid ECU 70, controls the driving of the motors MG1, MG2 based on a control signal from the hybrid ECU 70, and transmits data related to the operating state of the motors MG1, MG2 to the hybrid ECU 70 as necessary. Output.

  The battery 50 is managed by a battery electronic control unit (hereinafter referred to as “battery ECU”) 52. The battery ECU 52 is attached to a signal necessary for managing the battery 50, for example, a voltage between terminals from a voltage sensor (not shown) installed between the terminals of the battery 50, and a power line connected to the output terminal of the battery 50. The charge / discharge current from the current sensor, the battery temperature from the temperature sensor (not shown) attached to the battery 50, and the like are input. The battery ECU 52 outputs data related to the state of the battery 50 to the hybrid ECU 70 and the engine ECU 24 by communication as necessary.

  The air conditioning unit 90 includes an air conditioning duct 91 that defines an air passage for guiding conditioned air into the passenger compartment of the hybrid vehicle 20, a blower 92 that generates an air flow in the air conditioning duct 91, and mainly during cooling of the passenger compartment. A refrigeration cycle 93 for cooling the air flowing through the air conditioning duct 91, a heater core 98 for heating the air flowing through the air conditioning duct 91 mainly during heating of the passenger compartment, and an air conditioning electronic unit for controlling the entire air conditioning unit 90 A control unit (hereinafter referred to as “air conditioning ECU”) 100 and the like are included.

  The air conditioning duct 91 has, for example, an outside air inlet and an inside air inlet formed so as to be positioned in the vicinity of the blower 92, a defroster outlet, a face outlet, a foot outlet, and the like. is doing. An inside / outside air switching damper 91a is disposed in the vicinity of the outside air inlet and the inside air inlet, and outlet switching dampers 91b, 91c, 91d are disposed for the defroster outlet, the face outlet, and the foot outlet. Yes. The blower 92 of the embodiment is configured as a centrifugal blower including a scroll case integrated with the air conditioning duct 91, a centrifugal fan rotatably disposed in the case, a blower motor that rotationally drives the centrifugal fan, and the like. ing. The refrigeration cycle 93 includes an evaporator 94 disposed in the air conditioning duct 91, a compressor 95 that sucks and compresses refrigerant gas evaporated by the evaporator 94, and a high-temperature and high-pressure compressed by the compressor 95. A condenser (condenser) 96 that cools and liquefies the refrigerant gas, an expansion valve 97 that decompresses and expands the liquefied refrigerant, a gas-liquid separator (not shown), a receiver tank, and the like are included. The evaporator 94 is arranged in the air conditioning duct 91 so as to block the entire surface of the air passage, and cools or dehumidifies the air flowing through the air conditioning duct 91 by heat exchange with the refrigerant from the expansion valve 97. In addition, the compressor 95 of the embodiment is configured as an electric compressor driven by a motor connected to the battery 50 via an inverter. Furthermore, the condenser 96 is disposed at a position where it is easy to receive traveling wind generated by the traveling of the hybrid vehicle 20, and cools the refrigerant by exchanging heat between the outside air blown by a cooling fan (not shown) and the traveling wind and the refrigerant. The heater core 98 is disposed in the air conditioning duct 91 so as to partially block the air passage on the downstream side of the evaporator 94, and an air mix damper 99 is disposed between the evaporator 94 and the heater core 98. The heater core 98 receives supply of engine cooling water that has cooled the engine 22 and heats air from the evaporator 94 side using the engine cooling water as a heat source. The air mix damper 99 is driven by a servo motor or the like (not shown), and adjusts the ratio between the amount of air passing through the heater core 98 and the amount of air bypassing the heater core 98 by changing the opening of the air mix damper 99. Thus, the temperature of the conditioned air blown into the passenger compartment can be adjusted.

  The air conditioning ECU 100 is configured as a microprocessor centered on a CPU (not shown). The air conditioning ECU 100 includes an air conditioning on / off signal from an A / C on / off switch (air conditioning execution instruction switch) 101 provided on an instrument panel or the like in the vehicle interior, a set temperature signal from the temperature setting switch 102, a vehicle interior. The automatic air conditioning command signal from the A / C auto switch (automatic air conditioning selection switch) 103 for selecting the execution of the automatic air conditioning control for keeping the temperature at the set temperature, and the room temperature from the sensor (not shown) The outside temperature, the amount of solar radiation, etc. are input. The air conditioning ECU 100 controls the dampers 91a to 91d, the blower 92, the compressor 95, the air mix damper 99, and the like based on these input signals. In addition, when the A / C auto switch 103 is turned on, the air conditioning ECU 100 causes the blower so that the temperature of the conditioned air blown into the passenger compartment becomes the set temperature set via the temperature setting switch 102. 92, compressor 95, air mix damper 99 and the like are controlled (automatic air conditioning control). The air conditioning ECU 100 also communicates with the hybrid electronic control unit 70, and if necessary, sends data related to the state of the air conditioning unit 90, engine operation requests when performing heating, etc. to the hybrid electronic control unit 70. Send.

  The hybrid ECU 70 is configured as a microprocessor centered on the CPU 72, and includes a ROM 74 that stores a processing program, a RAM 76 that temporarily stores data, an input / output port and a communication port (not shown), in addition to the CPU 72. . The hybrid ECU 70 detects the ignition signal from the ignition switch (start switch) 80, the shift position SP from the shift position sensor 82 that detects the shift position SP that is the operation position of the shift lever 81, and the depression amount of the accelerator pedal 83. The accelerator opening Acc from the accelerator pedal position sensor 84, the brake pedal stroke BS from the brake pedal stroke sensor 86 for detecting the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 87, and the like are input via the input port. . Further, near the driver's seat of the hybrid vehicle 20 of the embodiment, as an operation control mode, an ECO switch for selecting an ECO mode (energy saving mode) that prioritizes energy saving over driving performance, drivability, etc. of the vehicle. (Energy saving mode selection switch) 88 is provided, and this ECO switch 88 is also connected to the hybrid ECU 70. When the ECO switch 88 is turned on by a driver or the like, a predetermined ECO flag Feco that is set to a value of 0 is set to a value of 1 during normal times (when the switch is off), and a predetermined energy saving priority is set. The hybrid vehicle 20 is controlled according to various control procedures for time. The control for priority of energy saving includes the switching of the vehicle speed allowing the execution of regenerative braking to the low vehicle speed side, the reduction of creep torque when the brake pedal 85 is depressed, and the vibration of the operation line of the engine 22 ( Switching from vehicle noise to the low vehicle speed side, switching between the suppression line and the fuel efficiency priority line, reducing the engine lower limit rotation speed when the engine 22 is driven according to the fuel efficiency priority line, traveling from both the engine 22 and the motor MG2 Reduction of the output of the motor MG2 when obtaining motive power, switching of the vehicle speed allowing the intermittent operation (stop) of the engine 22 to the high vehicle speed side, stopping of the vibration suppression control using the motor MG1, and acceleration during motor traveling The processing for making it difficult to start the engine 22 when the workpiece is rough, the engine speed during the warm-up of the engine 22 and the prohibition of intermittent operation (stop) Fight include charge acceleration, etc. of the battery 50.

  In the hybrid vehicle 20 of the embodiment configured as described above, the required torque to be output to the ring gear shaft 32 as the axle based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. And the engine 22, the motor MG1, and the motor MG2 are controlled so that the power corresponding to the required torque is output to the ring gear shaft 32. As the operation control mode of the engine 22, the motor MG1, and the motor MG2, the engine 22 is operated and controlled so that power corresponding to the required torque is output from the engine 22, and all of the power output from the engine 22 is a power distribution integration mechanism. 30, the torque conversion operation mode in which the motors MG 1 and MG 2 are driven and controlled so that the torque is converted by the motor MG 1 and the motor MG 2 and output to the ring gear shaft 32, and the sum of the required power and the power required for charging / discharging the battery 50. The engine 22 is operated and controlled so that power corresponding to the power is output from the engine 22, and all or part of the power output from the engine 22 with charging / discharging of the battery 50 is performed by the power distribution and integration mechanism 30 and the motor MG1. The required power is converted to the ring gear shaft 3 by torque conversion with the motor MG2. Charge / discharge operation mode in which the motors MG1 and MG2 are controlled to be output to the motor, motor operation mode in which the operation of the engine 22 is stopped and the power corresponding to the required power is output from the motor MG2 to the ring gear shaft 32, etc. There is.

  Next, the control procedure of the air conditioning unit 90 included in the hybrid vehicle 20 configured as described above will be described. FIG. 2 is a flowchart showing an example of an A / C compressor control routine executed by the air conditioning ECU 100 at predetermined time intervals (for example, every several msec) in order to determine whether or not the compressor 95 included in the air conditioning unit 90 is activated. It is.

  At the start of the A / C compressor control routine of FIG. 2, the CPU (not shown) of the air conditioning ECU 100 first needs to perform control such as a predetermined A / C on / off flag Fac, the value of the auto switch flag Fato, and the value of the ECO flag Feco. Data is input (step S100). Here, the A / C on / off flag Fac is set to a value of 0 if the A / C on / off switch 101 is turned off by the air conditioning ECU 100, and is set to a value of 1 if it is turned on, and stored in a predetermined storage area. When the A / C auto switch 103 is turned off by the air conditioning ECU 100, the auto switch flag Fato is set to a value of 0 if the A / C auto switch 103 is turned off, and is set to a value of 1 if it is turned on, and is stored in a predetermined storage area. Read. Further, the value of the ECO flag Feco set by the hybrid ECU 70 is input from the hybrid ECU 70 by communication.

  Subsequently, it is determined whether or not the A / C on / off switch 101 is turned off, that is, whether or not the A / C on / off flag Fac input in step S100 is 0 (step S110). If the A / C on / off flag Fac is 1 and the A / C on / off switch 101 is on, execution of the air conditioning of the passenger compartment accompanying the operation of the compressor 95 is instructed, so step S140. , The compressor 95 constituting the refrigeration cycle 93 is operated (maintained in the operating state), and the processing after step S100 is executed again. Further, when the A / C on / off flag Fac is 0 and the A / C on / off switch 101 is turned off, whether or not the A / C auto switch 103 is further turned on, that is, the auto switch flag Fauto is set. It is determined whether or not the value is 1 (step S120). When the auto switch flag Fato is 0 and the A / C auto switch 103 is off, the passenger compartment with the operation of the compressor 95 from either the A / C on / off switch 101 or the A / C auto switch 103. Therefore, in step S150, the compressor 95 constituting the refrigeration cycle 93 is stopped (maintained in the stopped state), and the processes in and after step S100 are executed again. On the other hand, when the auto switch flag Fato is a value 1 and the A / C auto switch 103 is turned on, whether or not the ECO switch 88 is further turned off, that is, whether or not the ECO flag Feco is a value 0. Is determined (step S130). If the ECO flag Feco is 0 and the ECO switch 88 is off, the compressor 95 constituting the refrigeration cycle 93 is operated (maintained in an operating state) in step S140, and the ECO flag Feco is 1 If the ECO switch 88 is turned on, the compressor 95 constituting the refrigeration cycle 93 is stopped (maintained in the stopped state) in step S150, and the processes in and after step S100 are executed again.

  As described above, in the hybrid vehicle 20 including the air conditioning unit 90 of the embodiment, the ECO switch 88 is turned off when the A / C auto switch 103 is turned on and the A / C on / off switch 101 is turned off. If so, the operation of the compressor 95 constituting the refrigeration cycle 93 is allowed (step S140). When the A / C auto switch 103 is turned on and the A / C on / off switch 101 is turned off, the ECO switch 88 is turned on. If so, the operation of the compressor 95 is prohibited (step S150). That is, in this air conditioning unit 90, when the ECO switch 88 is turned off, the air conditioning ECU 100 turns on the compressor 95 only by turning on the A / C auto switch 103 regardless of the on / off state of the A / C on / off switch 101. Automatic air-conditioning control with operation is executed. On the other hand, when the ECO switch 88 is turned on, if the A / C on / off switch 101 is not turned on separately, the operation of the compressor 95 is prohibited even if the A / C auto switch 103 is turned on. The ECU 100 executes automatic air conditioning control that does not involve the operation of the compressor 95. Therefore, in the hybrid vehicle 20 equipped with the air conditioning unit 90, if the ECO switch 88 is turned on, the operation of the compressor 95 when the A / C auto switch 103 is turned on is suppressed, thereby slightly reducing the air conditioning performance. Although it is possible to reduce the energy consumption associated with the driving of the compressor 95, energy saving can be achieved without forcing the user to perform complicated operations. That is, since the drive source of the compressor 95 of the above embodiment is a motor that operates by the electric power from the battery 50, the ECO is activated when the A / C auto switch 103 is turned on and the A / C on / off switch 101 is turned off. If the switch 88 is turned on, the operation of the compressor 95 is prohibited and the air conditioning performance is slightly reduced. However, the power consumption by the motor that drives the compressor 95 is eliminated, and the energy saving of the air conditioning unit 90 and thus the hybrid vehicle 20 is achieved. Can be achieved. In addition to the air conditioning unit 90, the ECO switch 88 provided in the hybrid vehicle is used for a plurality of vehicle-related devices controlled under an energy saving mode such as the engine 22, the motors MG1, MG2, and the battery 50. To collectively indicate that the energy saving mode has been selected. Therefore, in the hybrid vehicle 20, if the ECO switch 88 is turned on, it is possible to control the plurality of vehicle-related devices in the energy saving mode. Therefore, a complicated operation is required for a user who desires energy saving of the vehicle. Never be forced.

  In addition, although the hybrid vehicle 20 of the said Example outputs the motive power of motor MG2 to the axle connected to the ring gear shaft 32, the application object of this invention is not restricted to this. That is, the present invention is different from the axle (the axle to which the wheels 39a and 39b are connected) that is connected to the ring gear shaft 32 by the power of the motor MG2 like a hybrid vehicle 20A as a modified example shown in FIG. The present invention may be applied to the one that outputs to the wheels 39c and 39d in FIG. Further, the hybrid vehicle 20 of the above embodiment outputs the power of the engine 22 to the ring gear shaft 32 as an axle connected to the wheels 39a and 39b via the power distribution and integration mechanism 30. The subject is not limited to this. That is, the present invention provides an inner rotor 232 connected to the crankshaft of the engine 22 and an outer rotor connected to an axle that outputs power to the wheels 39a and 39b, like a hybrid vehicle 20B as a modified example shown in FIG. 234, and may be applied to a motor including a counter-rotor motor 230 that transmits a part of the power of the engine 22 to the axle and converts the remaining power into electric power. Further, the present invention may be applied to a vehicle provided with a continuously variable transmission (hereinafter referred to as “CVT”) as power transmission means for transmitting the power of the engine 22 to the axle side instead of the power distribution and integration mechanism 30. . A hybrid vehicle 20C as an example of such a vehicle is shown in FIG. The hybrid vehicle 20C of the modification shown in the figure is synchronized with the front wheel drive system that outputs the power from the engine 22 to, for example, the front wheels 39a and 39b via the belt type or toroidal type CVT 140, the differential gear 38, and the like. And a rear wheel drive system that outputs power from a motor MG that is a generator motor to, for example, wheels 39c and 39d that are rear wheels via a differential gear 38 'or the like. The motor MG is connected to an alternator 29 driven by the engine 22 via an inverter and a battery 50 whose output terminal is connected to the power line from the alternator 29. Thereby, the motor MG is driven by the electric power from the alternator 29 and the battery 50, or charges the battery 50 with the electric power generated by regeneration.

  Moreover, although the compressor 95 which comprises the refrigerating cycle 93 of the air-conditioning unit 90 of the said Example is made into an electric compressor, it is not restricted to this. That is, the vehicle air conditioner according to the present invention may include a compressor 95A using the engine 22 as a drive source, like an air conditioning unit 90A illustrated in FIG. In the air conditioning unit 90A of FIG. 6, the rotating shaft of the compressor 95A is connected to the crankshaft of the engine 22 via the clutch C1, the belt 23, and the like. If the engine 22 is operated with the clutch C1 connecting the rotating shaft of the compressor 95A and the crankshaft of the engine 22, the compressor 95A is driven by the engine 22 to cool the air in the air conditioning duct 91 by the evaporator 94. Dehumidification can be performed. In the air conditioning unit 90A provided with such a compressor 95A, if the ACO auto switch (not shown) is turned on and the ECO switch (not shown) is turned on when the A / C on / off switch is turned off, the compressor 95A Although the air conditioning performance is slightly reduced due to the prohibition of the operation of the engine, the burden on the engine 22 that drives the compressor 95A, that is, the fuel consumption, is reduced to reduce the energy consumption of the air conditioning unit 90A and thus the automobile 20D having the same. Is possible. Since the vehicle air conditioner according to the present invention may include a compressor 95A using the engine 22 as a drive source, in addition to the hybrid vehicle 20 and the like, the engine 22 and the automatic transmission as illustrated in FIG. Needless to say, the present invention can be applied to a general automobile 20D equipped with the machine AT.

  Here, the correspondence between the main elements of the above-described embodiments and modifications and the main elements of the invention described in the column of means for solving the problems will be described. That is, the ECO switch 88 for selecting an ECO mode giving priority to energy saving corresponds to the “energy saving mode selection switch”, and the hybrid vehicles 20, 20A, 20B, 20C and the vehicle 20D correspond to “vehicles”. The air conditioning unit 90 corresponds to the “vehicle air conditioner”, the refrigeration cycle 93 including the compressors 95 and 95A driven by the motor and the engine 22 corresponds to the “refrigeration cycle”, and the temperature in the passenger compartment is kept at the set temperature. A / C auto switch 103 for selecting execution of automatic air-conditioning control to be performed corresponds to an “automatic air-conditioning selection switch” for instructing execution of air conditioning in the passenger compartment accompanied by operation of compressors 95 and 95A. The A / C on / off switch 101 corresponds to the “air conditioning execution instruction switch”, and the A / C compressor control routine of FIG. Air conditioning ECU100 for the execution corresponds to the "control means". The correspondence between the main elements of the embodiments and the main elements of the invention described in the column of means for solving the problems is the same as that of the invention described in the column of means for solving the problems by the embodiments. Since this is an example for specifically explaining the best mode for carrying out the invention, the elements of the invention described in the column of means for solving the problems are not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is described in the description of that column. Should be done on the basis.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

  The present invention can be used in a vehicle air conditioner, an automobile manufacturing industry, and the like.

It is a schematic block diagram of the hybrid vehicle 20 provided with the air conditioning unit 90 which concerns on one Example of this invention. It is a flowchart which shows an example of the A / C compressor control routine performed by ECU100 for an air conditioning of an Example. It is a schematic block diagram of the hybrid vehicle 20A which concerns on a modification. FIG. 12 is a schematic configuration diagram of a hybrid vehicle 20B according to another modification. It is a schematic block diagram of the hybrid vehicle 20C which concerns on another modification. It is a schematic block diagram of motor vehicle 20D which concerns on a modification.

Explanation of symbols

  20, 20A, 20B, 20C Hybrid vehicle, 20D vehicle, 22 engine, 23 belt, 24 engine electronic control unit (engine ECU), 29 alternator, 30 power distribution integration mechanism, 30a sun gear, 30b ring gear, 30c pinion gear, 30d carrier , 32 ring gear shaft, 38, 38 'differential gear, 39a-39d wheels, 40 electronic control unit for motor (motor ECU), 41, 42 inverter, 50 battery, 52 electronic control unit for battery (battery ECU), 70 for hybrid Electronic control unit (hybrid ECU), 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator Pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal stroke sensor, 87 vehicle speed sensor, 88 ECO switch, 90, 90A air conditioning unit, 91 air conditioning duct, 91a inside / outside air switching damper, 91b, 91c, 91d outlet switching Damper, 92 Blower, 93 Refrigerating cycle, 94 Evaporator, 95, 95A Compressor, 96 Condenser, 97 Expansion valve, 98 Heater core, 99 Air mix damper, 100 Air conditioning electronic control unit (air conditioning ECU), 101 A / C on / off switch , 102 Temperature setting switch, 103 A / C auto switch, 140 CVT, 230 Counter rotor motor, 232 Inner rotor, 234 Outer rotor, C1 clutch, MG, MG1, MG2 mode .

Claims (5)

A vehicle air conditioner that air-conditions a vehicle cabin provided with an energy saving mode selection switch for selecting an energy saving mode that prioritizes energy saving,
A refrigeration cycle including a compressor driven by a predetermined drive source; and an automatic air-conditioning selection switch for selecting execution of automatic air-conditioning control to keep the temperature in the vehicle interior at a set temperature;
An air conditioning execution instruction switch for instructing execution of air conditioning of the passenger compartment accompanied by operation of the compressor;
If the energy saving mode selection switch is off when the automatic air conditioning selection switch is turned on and the air conditioning execution instruction switch is off, the compressor is allowed to operate, and the automatic air conditioning selection switch is on. Control means for prohibiting the operation of the compressor if the energy saving mode selection switch is turned on when the air conditioning execution instruction switch is turned off,
A vehicle air conditioner.   The vehicle air conditioner according to claim 1, wherein the vehicle includes a power storage unit, and a driving source of the compressor is an electric motor that is operated by electric power from the power storage unit.   The vehicle air conditioner according to claim 1, wherein the vehicle includes an internal combustion engine capable of outputting power, and the drive source of the compressor is the internal combustion engine.   The energy saving mode selection switch of the vehicle collectively indicates that the energy saving mode is selected for a plurality of vehicle-related devices controlled under the energy saving mode including the vehicle air conditioner. The vehicle air conditioner according to any one of claims 1 to 3, which is instructed. A refrigeration cycle including a compressor driven by a predetermined drive source, an automatic air-conditioning selection switch for selecting execution of automatic air-conditioning control so that the temperature in the passenger compartment is maintained at a set temperature, and the compressor An air conditioning execution instruction switch for instructing execution of air conditioning in the passenger compartment accompanied by driving, and a vehicle passenger compartment having an energy saving mode selection switch for selecting an energy saving mode prioritizing energy saving. A control method for a vehicle air conditioner for air conditioning,
If the energy saving mode selection switch is turned off when the air conditioning execution instruction switch is turned off and the automatic air conditioning selection switch is turned on, the compressor is allowed to operate, and the air conditioning execution instruction switch is turned off. And the operation of the compressor is prohibited if the energy saving mode selection switch is turned on when the automatic air conditioning selection switch is turned on,
Control method for vehicle air conditioner.

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