JP2009038900A - Regenerative energy amount notification device - Google Patents

Abstract

[PROBLEMS] To provide a regenerative energy amount notification device that enables a vehicle driver to recognize how much regenerative energy is generated by his / her own driving and contributes to energy saving operation.
The hybrid vehicle 1 integrates the power generation amount detected by the power generation amount detection unit 43 after the transition to the regenerative state and before the transition from the regenerative state to the non-regenerative state, and based on the accumulated power generation amount. Then, the regenerative charge amount generated by shifting to the regenerative state once is calculated. The display device 19 displays the regenerative charge amount calculated by the hybrid control device 15 on the screen.
[Selection] Figure 1

Description

  The present invention relates to a regenerative energy amount notification device provided in a vehicle including a power generation unit, an electric unit, and a secondary battery.

  There is an operation state display device for a vehicle that quantitatively displays a state in which a battery is charged with generated power from a motor.

JP 2006-290182 A

  According to the above conventional display device, the driver can visually recognize the input / output level of the battery and how much the input / output level is relative to the maximum value.

  However, in the above conventional display device, only the current instantaneous input / output level for the battery is displayed, and how much electric power is supplied to the battery during one regeneration, that is, by its own operation. It is impossible to recognize how much regenerative energy has been generated and contributed to energy-saving operation.

  The present invention has been made in view of the above circumstances, and it is possible for a vehicle driver to recognize how much regenerative energy has been generated by his / her own driving and contributed to energy-saving driving. An object is to provide a possible regenerative energy amount notification device.

  In order to achieve the above object, the present invention provides a regenerative energy amount notification device provided in a vehicle including a power generation means, an electric means, and a secondary battery, comprising a power generation amount detection means, a regenerative energy amount calculation means, and a notification. Means.

  The power generation means can be set in a regenerative state in which the power is generated by being driven and rotated in conjunction with the drive wheels. The electric means can be set to a driving state in which the driving wheel is driven and rotated. The secondary battery stores electric power generated by the power generation means and supplies electric power to the electric means.

  The power generation amount detection means detects the power generation amount of the power generation means. The regenerative energy amount calculation means integrates the power generation amount detected by the power generation amount detection means until the power generation means shifts to the non-regenerative state after the power generation means shifts to the regenerative state, and Based on this, the amount of regenerative energy generated by the power generation means shifting once to the regenerative state is calculated. The notification means notifies the driver of the regenerative energy amount calculated by the regenerative energy amount calculation means.

  In the above configuration, the driver of the vehicle easily recognizes how much regenerative energy is generated by the driving of the driver and contributes to energy-saving operation by the amount of regenerative energy notified by the notification means. Can do.

  According to the present invention, the driver of the vehicle uses the amount of regenerative energy that is notified by the notifying means of how much regenerative energy is generated during one regenerative operation and contributes to energy-saving operation. It can be easily recognized.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram schematically showing a vehicle according to an embodiment of the present invention.

  As shown in FIG. 1, the hybrid vehicle 1 includes an engine 3, a transmission 5, a motor generator (power generation means, electric means) 7, a battery (secondary battery) 9, and an engine control device (Engine Electric Control Unit). 11, a transmission control device (Transmission Electric Control Unit) 13, a hybrid control device (Hybrid Electric Control Unit, regenerative energy amount calculating means) 15, a motor generator / inverter (M / G inverter) 17, and a display device (notification) Means) 19.

  The output shaft of the engine 3 is connected to the input shaft of the transmission 5 via a wet multi-plate clutch 21, and the output shaft of the transmission 5 is connected to the left and right rear wheels via a propeller shaft 23, a differential device 25 and a rear axle 27. (Drive wheel) 29 is connected. The rotation shaft of the motor generator 7 is connected to the output shaft of the transmission 5 via the gear 31 and the clutch 33.

  The motor generator 7 is in a regenerative state in which the motor generator 7 is driven and rotated in conjunction with the output shaft of the transmission 5, a driving state in which the output shaft of the transmission 5 is driven and rotated, and a non-cut state disconnected from the output shaft of the transmission 5 by the clutch 33 It is selectively set to the operating state. That is, the motor generator 7 functions as both a power generation unit and an electric unit. Instead of the motor generator 7, a generator (power generation means) and a motor (electric means) may be provided separately.

  The battery 9 stores the electric power generated by the regenerative motor generator 7 via the M / G inverter 17 and supplies the electric power to the driven motor generator 7 via the M / G inverter 17.

  The display device 19 has a screen arranged on an instrument panel (not shown) that is visible to the driver seated in the driver's seat, and receives a display control signal from the hybrid control device 15 to display a predetermined image on the screen. indicate.

  The engine control device 11 receives a vehicle speed signal from a vehicle speed sensor 35 that detects the speed of the hybrid vehicle 1 and an accelerator operation signal from an accelerator sensor 37 that detects an operation (depression) of an accelerator pedal. The engine control device 11 controls the opening degree of the fuel injection device 39 of the engine 3 based on the vehicle speed signal, the accelerator operation signal, and the control signal from the hybrid control device 15, and adjusts the amount of fuel supplied to the engine 3. To do. Further, the engine control device 11 transmits a vehicle speed signal and an accelerator operation signal to the hybrid control device 15.

  The transmission control device 13 receives a vehicle speed signal from the vehicle speed sensor 35 and an engine rotation speed signal from a rotation speed sensor (not shown) that detects the rotation speed of the engine 3. The transmission control device 13 selects an optimal gear stage from a map or table stored in advance based on the vehicle speed signal and the engine rotation speed signal, and controls the shift actuator 41 and the clutch 21 of the transmission 5 to thereby transmit the transmission 5. Is set to the optimum gear stage and connected to the engine 3.

  In addition to the vehicle speed signal and the accelerator operation signal, the hybrid control device 15 includes the power generation amount information from the power generation amount detection unit (power generation amount detection means) 43 that detects the power generation amount of the motor generator 7 and the output shaft of the transmission 5. Vehicle information including a drive rotation speed signal from a drive rotation speed sensor 45 that detects the rotation speed is input. Based on the input vehicle information, the hybrid control device 15 is a motor control device (Motor Electric control device 11, a starter 47 of the engine 3, a transmission control device 13, a clutch 33, or a motor control device of the M / G inverter 17. Control unit) 49 and a battery control device (Battery Electric Control Unit) 51 of the battery 9, a drive control process is executed according to the traveling state of the hybrid vehicle 1, and the state of the motor generator 7 is switched appropriately. . The hybrid control device 15 uses the power generation amount information from the power generation amount detection unit 43 until the motor generator 7 shifts to the regenerative state and then shifts from the regenerative state to the non-regenerative state. Based on the accumulated power generation amount, the regenerative charge amount (regenerative energy amount) generated by the motor generator 7 shifting once to the regenerative state is calculated, and the calculated regenerative charge amount is output to the display device 19. The regenerative energy amount display process to be executed is executed.

  Hereinafter, the drive control process executed by the hybrid control device 15 at the time of start / acceleration, constant speed travel, and deceleration will be described.

[When starting and accelerating]
When the hybrid vehicle 1 with a high load on the engine 3 starts or accelerates, the motor generator 7 is set in a driving state, and the driving wheels 29 are rotated by the engine 3 and the motor generator 7. Thereby, the load of the engine 3 is reduced. The torque assist amount by the motor generator 7 is controlled so that the exhaust gas and the fuel efficiency are optimized. By such torque assist, the transmission 5 shifts up early, so that fuel efficiency is improved. In the present embodiment, when the rate of increase of the vehicle speed indicated by the vehicle speed signal (acceleration of the hybrid vehicle 1) is large and the accelerator operation signal indicates the operation of the accelerator pedal, when the hybrid vehicle 1 starts or accelerates, Whether or not the hybrid vehicle 1 is starting or accelerating by another method, for example, it is determined that the vehicle is starting or accelerating when the speed of change in the accelerator pedal depression direction is faster than a predetermined speed. It may be determined. Furthermore, when the hybrid vehicle 1 has a GPS information reception function, the vehicle speed sensor 35 may not be provided, and the vehicle speed of the hybrid vehicle 1 may be calculated from the position information of the hybrid vehicle 1.

[At constant speed]
When the hybrid vehicle 1 travels at a constant speed, the motor generator 7 is set to a non-operating state, and the drive wheels 29 are rotationally driven only by the engine 3. As a result, the hybrid vehicle 1 travels with an optimum gear according to the traveling state, and fuel efficiency is improved. Further, since the motor generator 7 is disconnected from the drive system, energy is not wasted due to motor friction or magnetic field. In the present embodiment, when the vehicle speed indicated by the vehicle speed signal is not zero and the variation rate (acceleration of the hybrid vehicle 1) is within a predetermined range, it is determined that the hybrid vehicle 1 is traveling at a constant speed. It is determined whether the hybrid vehicle 1 is traveling at a constant speed by another method, such as determining that the vehicle is traveling at a constant speed when the speed of change in the pedal depressing direction or the depressing release direction is slower than a predetermined speed. Also good.

[When decelerating]
When the hybrid vehicle 1 decelerates, the motor generator 7 is set in a regenerative state, the rotation of the output shaft of the transmission 5 is transmitted to the motor generator 7 via the clutch 33 and the gear 31, and the electric power generated by the motor generator 7 is regenerated energy. Is stored in the battery 9 via the M / G inverter 17. At the time of this deceleration, the engine 3 and the transmission 5 are disconnected by the clutch 21. Thereby, the rotation of the propeller shaft 23 is transmitted to the motor generator 7 without waste, and the regenerative energy can be efficiently generated and recovered. Further, regenerative energy can be obtained even when the vehicle is traveling at a slow speed equivalent to the engine speed or the engine speed that is equal to or less than the engine idle rotation immediately before stopping. In the present embodiment, when the vehicle speed indicated by the vehicle speed signal is not zero and the accelerator operation signal indicates that the accelerator pedal is not operated (operation release), it is determined that the hybrid vehicle 1 is decelerating. It may be determined whether or not the vehicle 1 is decelerating. For example, when the vehicle speed information indicated by the vehicle speed sensor 35 tends to decrease, it is determined that the vehicle speed is in a deceleration state, or the acceleration sensor indicates a deceleration state when the vehicle has an acceleration sensor that detects acceleration in the longitudinal direction of the vehicle. It may be determined whether or not the acceleration calculated from the position information of the hybrid vehicle 1 indicates a deceleration state when the GPS information reception function is provided.

  Next, the regenerative charge amount display process executed by the hybrid control device 15 will be described with reference to FIGS. The hybrid control device 15 starts this process when the engine 3 is started. The regenerative charge amount display process of the present embodiment shown in FIG. 2 is performed every predetermined time (for example, every 5 msec), the regenerative charge amount is sequentially calculated, and the display content is updated.

  In the RAM (Random Access Memory) of the hybrid controller 15, a regenerative charge amount storage area for storing the regenerative charge amount obtained by integrating the power generation amount indicated by the power generation amount information from the power generation amount detection unit 43 until reset. Is provided.

  As shown in FIG. 2, when this process is started, it is first determined whether or not the motor generator 7 is in a regenerative state (step S1). In this embodiment, since the motor generator 7 shifts to the regenerative state with the accelerator pedal released, it is determined that the regenerative state is present when the accelerator operation signal indicates that the accelerator pedal is not operated (operation release). To do. It is determined that the power generation amount indicated by the power generation amount information from the power generation amount detection unit 43 is in a regenerative state when the power generation amount is not zero, or is determined to be in a regenerative state when the hybrid vehicle 1 is decelerated, etc. You may determine whether it is in a regeneration state by another method. Further, it may be determined that the regenerative state is obtained by combining these signals and information.

  When it determines with it being in a regenerative state (step S1: Yes), the regenerative charge amount memorize | stored in the regenerative charge amount storage area is read, and the power generation which the read regenerative charge amount and the power generation amount information from the power generation amount detection part 43 show The amount is accumulated (step S2), and the new regenerative charge amount obtained by the accumulation is stored in the regenerative charge amount storage area (step S3). In the first process after the transition from the non-regenerative state to the regenerative state, since the regenerative charge amount is not stored in the regenerative charge amount storage area, the power generation amount indicated by the power generation amount information from the power generation amount detection unit 43 is used as it is. Store in the regenerative charge amount storage area.

  Next, a display control signal for displaying and controlling the regenerative charge amount stored in the regenerative charge amount storage area in step S3 is output to the display device 19 (step S4), and this process is terminated. Thereby, an image as shown in FIG. 3 is displayed on the screen of the display device 19.

  If it is determined in step S1 that it is not in the regenerative state (step S1: No), the display on the display device 19 is reset (not displayed) (step S5), and the regenerative charge stored in the regenerative charge amount storage area is stored. The amount of charge is cleared (step S6), and this process ends.

  That is, in the regenerative state, the processes in steps S2 to S4 are executed after step S1, and in the non-regenerative state, the processes in steps S5 and S6 are executed after step S1. Further, while the regenerative state or the non-regenerative state continues, the respective processes are continuously executed. Moreover, the time when the process shifts from the non-regenerative state process to the regenerative state process is when the process shifts to the regenerative state of the present invention, which is the start of one regenerative state. Moreover, the time when the process is shifted from the process of the regenerative state to the process of the non-regenerative state is when the process is shifted to the non-regenerative state of the present invention, and is the end of one regenerative state.

  FIG. 3 is an example of an image displayed on the screen of the display device 19 by the regenerative charge amount display process. The display device 19 has 13 bar graphs 57a to 57m. The bar graphs 57a to 57m are arranged in order from the left of the display device 19, and are turned on / off by the regenerative charge amount display processing of the hybrid control device 15. In the display device 19 shown in FIG. 3, the bar graphs 57a to 57e indicated by parallel diagonal lines are in the on state, and the bar graphs 57f to 57m indicated in white are in the off state. By displaying the bar graphs 57 a to 57 m on / off, 14 patterns are set as the display mode of the display device 19.

  FIG. 4 is a table showing the correspondence between the regenerative charge amount divided stepwise into a plurality of ranges and the display mode of the display device 19. In the present embodiment, the regenerative charge amount is divided into 14 stages. The table is stored in advance in a ROM (Read Only Memory) of the hybrid controller 15, and is referred to when a display control signal is output in step S4 of the regenerative charge amount display process. The left column of FIG. 4 shows a 14-step range of the regenerative charge amount. The right column of FIG. 4 shows the display pattern of 14 patterns by the display device corresponding to the range of 14 stages of the regenerative charge amount. A to L in the left column of FIG. 4 indicate values of the regenerative charge amount, and have a relationship of zero <A <B <C <D <E <F <G <H <I <J <K <L.

  When the regenerative charge amount is zero, all of the bar graphs 57a to 57m are turned off (not displayed). When the regenerative charge amount exceeds zero and is A or less, the bar graph 57a is lit. When the regenerative charge amount exceeds A and is B or less, the bar graphs 57a and 57b are lit, and the regenerative charge amount exceeds B. Bar graphs 57a to 57c are lit when C or less, and bar graphs 57a to 57d are lit when the regenerative charge amount exceeds C and is equal to or less than D. Similarly, the bar graphs 57a to 57m that are turned on as the regenerative charge amount increases and exceeds the respective values A to L increase sequentially from the left, and when the regenerative charge amount exceeds K and is L or less, the bar graph When the regenerative charge amount is above L, all the bar graphs 57a to 57m are lit. Accordingly, the display device 19 shows the state of the regenerative charge amount in 14 patterns including one pattern in which all the bar graphs 57a to 57m are turned off and 13 patterns in which the bar graphs 57a to 57m are turned on. It is.

  Moreover, the classification | category by A to L of the regenerative charge amount of the left column of FIG. 4 may set the magnitude | size of a range at equal intervals, and may vary the magnitude | size of a range. As an aspect in which the size of the range of the regenerative charge amount A to L is made different, for example, a region with a relatively small regenerative charge amount may be divided into a finer range than other regions. By dividing a region with a relatively small amount of regenerative charge in a finer range than other regions, it becomes easier for the driver to recognize an increase in the amount of regenerative charge at the initial stage displayed on the display device 19.

  Further, the bar graphs 57a to 57m of the display device 19 are not displayed in a single color. For example, the display colors of the bar graphs 57a to 57d, the bar graphs 57e to 57i, and the bar graphs 57j to 57m are made different from each other. May be.

  Further, the display mode of the display device 19 is not limited to the bar graphs 57a to 57m. For example, the 14 patterns of regenerative charge amount may be displayed in words or characters (for example, alphabets).

  In addition, the number of regenerative charge amount categories in the table corresponding to the display device 19 is not limited to the 14 categories shown in FIG. 4, and may be two categories or stepless categories. In the case of stepless classification, for example, the regenerative charge amount may be displayed on the display device 19 with a stepless moving image, or the value of the regenerative charge amount may be displayed as a number as it is.

  By executing the regenerative charge amount display process, every time the regenerative state is displayed on the screen of the display device 19 from when the accelerator pedal is released until it is depressed again, the regenerative state in the single regenerative state is displayed. The amount of charge is displayed. Further, since the regenerative charge amount sequentially accumulated by the regenerative charge amount display process is updated and displayed on the display device 19 even in the regenerative state, the regenerative charge amount of the display device 19 is displayed in an increasing trend.

  The display on the display device 19 does not have to be displayed during the regenerative state. For example, the display may be started when the regenerative state is shifted to the non-regenerative state. Further, the display of the display device 19 and the storage of the regenerative charge amount in the regenerative charge amount storage area are not reset when the regenerative state is shifted to the non-regenerative state, for example, are displayed for a predetermined time after the shift to the non-regenerative state. After resetting, the resetting may be performed, or resetting from the non-regenerative state to the next regenerative state.

  In the present embodiment, when the accelerator pedal is released, it is determined that the engine is in the regenerative state, and when the accelerator pedal is not released (the accelerator pedal is depressed), the non-regenerative state is determined. In some cases, a stationary state is included during the regenerative state. For example, when the hybrid vehicle 1 is traveling on the down slope in the engine brake state, the brake pedal is depressed to temporarily stop, and then the brake pedal is released, so that the hybrid vehicle 1 may travel again in the engine brake state. In such a case, the stop state is included in the regenerative state. For this reason, even when the vehicle is stopped, the regenerative charge amount is integrated in the regenerative charge amount display process of the hybrid control device 15 and displayed on the display device 19. In the stop state, even if the display device 19 is updated, the display content is not changed.

  Further, in step S1 of the regenerative charge amount display process of the hybrid controller 15, when it is determined that the hybrid vehicle 1 is in the regenerative state when the hybrid vehicle 1 is decelerating, the stop state is set to the non-regenerative state. The state does not include the stop state. Accordingly, when the vehicle is in a stopped state, the processes of step S5 and step S6 of the regenerative charge amount display process are executed, the display of the display device 19 is reset, and the storage of the regenerative charge amount storage area is cleared.

  In the present embodiment, the driver of the hybrid vehicle 1 displays on the display device 19 how much regenerative charge amount has been generated in one regenerative state and contributed to energy-saving operation. It can be easily recognized by the regenerative charge amount.

  For this reason, the driver of the hybrid vehicle 1 recognizes that a different amount of regenerative charge is generated depending on the regenerative state of each time applied to each deceleration operation with different timings of releasing the accelerator pedal or depressing the brake pedal. Therefore, it is possible to recognize what kind of operation contributed to the energy saving operation, and it is possible to select and operate a deceleration operation with little waste of energy.

  Instead of or in addition to the display device 19, a sound output device may be provided to notify the regenerative charge amount by sound.

  Moreover, although this embodiment demonstrated the hybrid vehicle 1, you may apply the said regenerative charge amount display process to the electric vehicle by which the battery was mounted as a drive source.

1 is a block configuration diagram schematically showing a vehicle according to an embodiment of the present invention. It is a flowchart of a regeneration charge amount display process. It is an example of the image displayed on the screen of a display apparatus. It is a table which shows a response | compatibility with the display apparatus shown in FIG. 3, and regenerative charge amount.

Explanation of symbols

1: Hybrid vehicle 3: Engine 5: Transmission 7: Motor generator (power generation means, electric means)
9 :: Battery (secondary battery)
15: Hybrid control device (regenerative energy amount calculating means)
19: Display device (notification means)
29: Rear wheel (drive wheel)
43: Power generation amount detection unit (power generation amount detection means)

Claims (1)

A power generation means, an electric means, and a secondary battery are provided, and the power generation means can be set to a regenerative state in which the power is driven and rotated in conjunction with the drive wheels, and the electric means drives and rotates the drive wheels. The secondary battery is a regenerative energy amount notification device provided in a vehicle that stores electric power generated by the power generation means and supplies electric power to the electric means;
A power generation amount detection means for detecting the power generation amount of the power generation means;
After the power generation means shifts to the regenerative state, the power generation amount detected by the power generation amount detection means is integrated from the regeneration state to the non-regenerative state, and the power generation is based on the integrated power generation amount. Regenerative energy amount calculating means for calculating the amount of regenerative energy generated by the means shifting once to the regenerative state;
A regenerative energy amount notification device comprising: notification means for notifying a driver of the regenerative energy amount calculated by the regenerative energy amount calculation means.

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