JP5521399B2 - Hybrid vehicle alarm system - Google Patents

Description

  The present invention relates to a hybrid vehicle notification system that notifies a driver of an operation amount performed by a driver in order to adjust a vehicle speed in a hybrid vehicle that travels by combining an internal combustion engine and an electric motor.

  In recent years, hybrid vehicles equipped with both an engine and a motor have been actively developed from the viewpoint of environmental protection. In the hybrid vehicle, the opening degree of the engine throttle is not necessarily linked to the amount of depression of the accelerator pedal by the driver, and thus the driver of the hybrid vehicle cannot know information corresponding to the driving characteristics.

  Therefore, a display device has been proposed that displays to the driver the opening of the throttle valve of the engine, the amount of depression of the accelerator pedal, the driving state of the motor, and the regenerative state (see Patent Document 1). In patent document 1, it is supposed that the driver can be notified of appropriate drive information of the hybrid vehicle by this display device.

Japanese Patent No. 3385724

  As means for improving the fuel efficiency of hybrid vehicles, "Do not start the engine except when necessary" and "Generate braking force as much as possible in regenerative operation, store kinetic energy as electrical energy, and waste it as thermal energy There is a means to "do not".

  The former means can be handled by learning to operate the accelerator pedal properly, such as not depressing the accelerator too much or suddenly, and the latter means also depressing the brake pedal more than necessary. It is possible to respond by operating the brake pedal appropriately.

  However, it takes time for the driver to experience appropriate operation of the accelerator pedal and the brake pedal through experience, and it cannot be accurately learned. Moreover, it is difficult to improve the fuel efficiency of the hybrid vehicle simply by displaying the accelerator depression amount.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a hybrid vehicle notification system that teaches an appropriate operation for improving a driver's driving skill and improving fuel efficiency. It is to be.

  A feature of the present invention is a hybrid vehicle notification system that notifies a driver of an operation amount performed by a driver in order to adjust a vehicle speed in a hybrid vehicle that travels by combining an internal combustion engine and an electric motor. A control unit that calculates an operation amount that is a switching point at which the fuel efficiency of the vehicle deteriorates, and a notification unit that notifies the current operation amount and the operation amount that is a switching point calculated by the control unit And providing.

According to the characteristics of the present invention, an appropriate operation method is announced in accordance with the driving operation of the driver, and the driver responds to this, thereby improving the driving skill of the driver, that is, the fuel consumption. Can be improved.

  In the feature of the present invention, the amount of operation performed by the driver to adjust the vehicle speed may be the amount of depression of the accelerator pedal. In this case, the control unit calculates the depression amount of the accelerator pedal, which is a switching point for starting the internal combustion engine, with respect to the current depression amount of the accelerator pedal, and the notification unit notifies the calculated depression amount of the accelerator pedal. do it. The hybrid vehicle can run with the power of the motor even if the engine does not start, so that the engine will start more than necessary, the "actual engine starting point (accelerator opening)" is announced This makes it possible for the driver to consciously perform motor traveling, and as a result, contributes to improved fuel efficiency.

  In the feature of the present invention, the notification unit may change the notification method before and after the amount of depression of the accelerator pedal that is a switching point for starting the internal combustion engine when the amount of depression of the current accelerator pedal exceeds the amount of depression of the accelerator pedal. . When the operating point at which the engine starts is exceeded, for example, the display method (color, expression, etc.) is switched. As a result, it is possible to make the driver aware of the fuel-efficient driving by visually appealing that the engine is started due to the rough accelerator operation and that the fuel-efficient driving cannot be performed.

  In the feature of the present invention, the notifying unit changes the notifying method before and after approaching the predetermined amount when the current amount of pressing the accelerator pedal approaches a predetermined amount of the accelerator pedal that becomes a switching point for starting the internal combustion engine. May be. Thereby, it is possible to make the driver aware of low fuel consumption driving by visually announcing to the driver that the engine is about to start up and fuel consumption is reduced.

  In the feature of the present invention, the control unit increases the temperature of the cooling water for cooling the internal combustion engine, the state of charge of the high-power battery, the vehicle speed, and the change speed of the depression amount of the accelerator pedal as the internal combustion engine increases. The amount of depression of the accelerator pedal that becomes the switching point at which the engine is activated may be calculated to be small. Since the engine start point varies depending on various conditions of the vehicle, it is possible to visually announce a fuel-efficient driving method that always considers the vehicle state by incorporating this.

  In the feature of the present invention, the control unit calculates a difference between a current accelerator pedal depression amount and an accelerator pedal depression amount serving as a switching point at which the internal combustion engine is started, and the notification unit calculates the calculated accelerator pedal amount. You may alert | report the difference in the depression amount. Announcing the two parameters (the amount of depression that is the engine starting point and the current amount of depression) at the same time is complicated. Even if it is to announce how much the accelerator pedal can be depressed until the engine is started, that is, only the difference between the two is displayed, the fuel efficiency of the hybrid vehicle is sufficiently improved be able to.

  In the feature of the present invention, the operation amount performed by the driver to adjust the vehicle speed may be a depression amount of the brake pedal. In this case, the control unit calculates the braking force of the vehicle according to the current depression amount of the brake pedal by dividing it into a regenerative braking amount and a friction braking amount, and the notification unit calculates the regenerative braking amount and the friction braking amount. What is necessary is just to alert | report the braking force of the vehicle calculated by classifying into. As a result, it is possible to announce to the driver that the friction braking amount cannot be recovered and will be “lost”, and the driver is aware of this so that he / she can learn to operate the brake pedal with high energy efficiency. It becomes possible to do. Specifically, in order to generate the necessary braking force, the braking start point becomes slightly faster, and it is possible to learn a brake pedal operation method that compensates for the loss caused by friction braking.

  In the feature of the present invention, the notification unit may display the regenerative braking amount and the friction braking amount on the same axis, first display from the regenerative braking amount, and display the friction braking amount in addition to this. The driver can recognize that the amount of friction braking is “loss” and that the vehicle speed can be sufficiently reduced even under regenerative braking in the normal state, which can contribute to improved fuel efficiency. .

  As described above, according to the present invention, it is possible to provide a hybrid vehicle notification system that teaches an appropriate operation for improving a driver's driving skill and improving fuel efficiency.

It is a block diagram which shows the main structures of the hybrid vehicle concerning embodiment of this invention, and the alerting | reporting system for hybrid vehicles. FIG. 2A to FIG. 2C are bar graphs showing a first display example of the current accelerator pedal depression amount detected by the accelerator sensor 41 and the switching point P at which the fuel consumption of the vehicle deteriorates. FIG. 3A to FIG. 3C are bar graphs showing a second display example of the current accelerator pedal depression amount detected by the accelerator sensor 41 and the switching point P at which the fuel consumption of the vehicle deteriorates. 4 (a) to 4 (c) are bar graphs showing a third display example of the current accelerator pedal depression amount detected by the accelerator sensor 41 and the switching point P at which the fuel consumption of the vehicle deteriorates. FIG. 5A to FIG. 5C are bar graphs showing a fourth display example of the current accelerator pedal depression amount detected by the accelerator sensor 41 and the switching point P at which the fuel consumption of the vehicle deteriorates. FIG. 6A to FIG. 6C are bar graphs showing a first display example of an amount obtained by subtracting the current accelerator pedal depression amount from the activation point P, which is displayed on the display device 45. FIG. 7A to FIG. 7C are bar graphs showing a second display example of an amount obtained by subtracting the current accelerator pedal depression amount from the activation point P, which is displayed on the display device 45. FIG. 8A and FIG. 8B show the braking force of the vehicle corresponding to the current depression amount of the brake pedal detected by the brake sensor 42, divided into regenerative braking and friction braking. 2 is a bar graph showing a display example of 1; 9 (a) and 9 (b) show the vehicle braking force corresponding to the current depression amount of the brake pedal detected by the brake sensor 42, divided into regenerative braking and friction braking. 2 is a bar graph showing a display example of 2. 10 (a) and 10 (b) display the braking force of the vehicle according to the current depression amount of the brake pedal detected by the brake sensor 42, divided into regenerative braking and friction braking. 3 is a bar graph showing a display example of 3.

  Embodiments of the present invention will be described below with reference to the drawings. In the description of the drawings, the same parts are denoted by the same reference numerals.

  With reference to FIG. 1, the main structure of the hybrid vehicle and the alerting | reporting system for hybrid vehicles concerning embodiment of this invention is demonstrated. In FIG. 1, a thin broken line indicates a strong electric connection, a thin solid line indicates a weak electric connection, a thick solid line indicates a power connection, and a one-dot broken line indicates a hydraulic connection.

The hybrid vehicle is a vehicle that travels by combining an engine 35 as an example of an internal combustion engine and a drive motor 33 as an example of an electric motor, and includes a CPU (control unit) 11 that controls the entire vehicle, and an engine 35. A generator 34 that supports the starting of the engine, a high-power battery 31 that supplies power to the drive motor 33, and an inverter that supplies the electric energy of the high-power battery 31 to the drive motor 33 in accordance with the torque generated and the rotational speed of the engine 35 32, an auxiliary battery 12 that provides an operating power source for the CPU 11, a DC / DC converter 43 that converts the energy of the high-power battery 31 to about 12 V and supplies it to the auxiliary battery 12, and a water temperature sensor 44 that detects the temperature of the engine 35. And detect the stroke of the accelerator pedal (depressed amount) Accelerator sensor 41 that transmits this to CPU 11, brake sensor 42 that detects the stroke amount (depressed amount) of the brake pedal that the driver has depressed during deceleration, and transmits this to CPU 11, and according to the driver's vehicle speed adjustment operation A display device (notification unit) 45 for displaying an appropriate vehicle speed adjustment operation method for improving fuel efficiency, mechanical brakes 22a to 22d provided for the respective tires 51a to 51d, a brake actuator 21, and a planetary gear. And a transmission (T / A) 36 having a mechanism.

  The CPU 11 monitors various states including the state of charge (SOC), temperature, and deterioration state of the high-power battery 31, and calculates the amount of power that can be input / output according to these states. Then, by controlling the inverter 32 based on the calculated electric energy, the drive motor 33 and the generator 34 are operated, and the engine 35 is controlled. The driving force distribution between the driving motor 33 and the engine 35 is also controlled. Further, the CPU 11 considers the regenerative braking force by the drive motor 33 and transmits a braking force calculation command value generated by the mechanical brakes 22 a to 22 d to the brake actuator 21. The CPU 11 is basically based on grasping the own vehicle speed from the rotational speed of the drive motor 33. In addition, the CPU 11 monitors detected values of various sensors such as the accelerator sensor 41 and the brake sensor 42.

  The auxiliary battery 12 provides an operating power source for the CPU 11 and is supplied with power by a DC / DC converter 43 that uses the high-power battery 31 as a power source. The brake actuator 21 receives a braking force calculation command value to be generated by the mechanical brakes 22a to 22d calculated by the CPU 11, and applies a necessary hydraulic pressure to the mechanical brakes 22a to 22d accordingly.

  The mechanical brakes 22a to 22d generate a braking force according to the hydraulic pressure generated by the brake actuator 21. The high-power battery 31 assists vehicle travel by supplying power to the drive motor 33 via the inverter 32. The electric power generated by the generator 34 is recovered to the high-power battery 31 via the inverter 32. In addition, the high-power battery 31 includes a battery temperature sensor 42 that detects the temperature of the high-power battery 31, and the detected value of the battery temperature sensor 42 is transmitted to the CPU 11.

  The inverter 32 is directly controlled by the CPU 11, and supplies the electric energy of the high-power battery 31 to the drive motor 33 according to the torque and the rotational speed generated by the engine 35, and the electric energy generated by the generator 34 is supplied to the high-power battery. Return to 31. The drive motor 33, the generator 34 and the engine 35 are directly connected to a planetary gear mechanism built in the transmission 36. Therefore, the inverter 32 controls the high-power battery 31 and the generator 34 so as to keep a balance between the torque and the rotational speed in order to operate the vehicle normally.

  The drive motor 33 generates drive torque independently when the vehicle speed is low. That is, in this case, the engine 35 does not generate drive torque. When the vehicle speed is high, the drive motor 33 assists the drive torque generated by the engine 35. Further, when the vehicle is decelerated, the drive motor 33 generates electric energy by performing regenerative braking. The generated electric energy is returned to the high voltage battery 31 via the inverter 32.

The hybrid vehicle of FIG. 1 does not have a starter for starting the engine 35. The hybrid vehicle according to the embodiment of the present invention supports the start of the engine 35 by supplying electric power from the high-power battery 31 and operating the generator 34 as a motor when the engine 35 is started. During normal travel, electric energy is generated (power generation) by balancing the drive motor 33 and the engine 35, and this electric energy is returned to the high-power battery 31. Alternatively, the generated electric energy can be directly supplied to the drive motor 33. Thereby, it becomes possible to cope with rapid acceleration.

  The engine 35 is directly controlled by the CPU 11. Specifically, when the vehicle speed is high, torque is generated for driving the vehicle. Since the motor travels when the vehicle speed is low, control by the CPU 11 is unnecessary. The transmission 36 has a planetary gear mechanism. An engine 35 is directly connected to the planetary carrier, a drive motor 33 is directly connected to the internal gear (ring gear), and a generator 34 is directly connected to the sun gear (sun gear). The transmission equivalent of the conventional system is also configured inside.

  The DC / DC converter 43 converts the voltage supplied from the high voltage battery 31 to about 12 V and supplies the converted voltage to the auxiliary battery 12. The DC / DC converter 43 has the same function as an alternator in a conventional engine vehicle.

  The water temperature sensor 44 detects the temperature of the cooling water of the engine 35 and inputs this information to the CPU 11. The cooling air temperature sensor 45 detects the temperature of the cooling air that cools the high-power battery 31 and inputs this information to the CPU 11. The outside air temperature sensor 46 detects the temperature of the environment where the vehicle system is placed, and inputs this information to the CPU 11.

  The brake actuator 21 receives a braking force calculation command value to be generated by the mechanical brakes 22a to 22d calculated by the CPU 11, and applies a necessary hydraulic pressure to the mechanical brakes 22a to 22d accordingly. The mechanical brakes 22a to 22d generate a braking force according to the hydraulic pressure generated by the actuator 21.

  In the embodiment of the present invention, the CPU 11 calculates a first calculation function for calculating an operation amount of the accelerator pedal, which is a switching point at which the fuel consumption of the vehicle deteriorates with respect to the current operation amount of the accelerator pedal, and the current brake. A second calculation function for calculating an operation amount of a brake pedal, which is a switching point at which the fuel consumption of the vehicle deteriorates with respect to an operation amount of the pedal.

  Specifically, the first calculation function includes information obtained from the detection value of the water temperature sensor 44, such as whether or not the warm-up operation of the engine 35 has been completed, and strong power such as a charging state, presence / absence of an abnormality, and a deterioration state. This is executed based on the state of the battery 31, information obtained from the detected value of the accelerator sensor 41 such as the amount of depression of the accelerator pedal and its changing speed, and the rotational speed of the driving motor 33, that is, the vehicle speed. The display device 45 displays the amount of operation of the accelerator pedal or information related to it as a switching point at which the fuel efficiency of the vehicle calculated by the first calculation function deteriorates.

  In the second calculation function, the braking force of the vehicle corresponding to the current depression amount (brake command value) detected by the brake sensor 42 is divided into regenerative braking and friction braking. Specifically, a “braking force calculation command value” that the brake actuator 21 commands the mechanical brakes 22a to 22d is calculated as the friction braking amount, and the regenerative braking force by the drive motor 33 is calculated as the regenerative braking amount. To do. The display device 45 displays the braking force of the vehicle calculated by dividing into regenerative braking and friction braking as it is. As a result, the driver can feel that the amount of friction braking by the mechanical brakes 22a to 22d is "loss".

The display device 45 displays an appropriate accelerator pedal and brake pedal operation method for improving fuel efficiency, according to the depression amount detected by the accelerator sensor 41 and the brake sensor 42. A display example on the display device 45 will be described with reference to FIGS. Although the display examples in FIGS. 2 to 10 are all bar graph displays, they may be pie charts or indicator displays.

  With reference to FIG. 2A to FIG. 2C, a display example in which the current accelerator pedal depression amount displayed on the display device 45 is changed before and after the switching point P at which the fuel consumption of the vehicle deteriorates will be described. To do. 2 to 5 show the current accelerator pedal depression amount detected by the accelerator sensor 41 and the accelerator pedal depression amount (a switching point at which the engine 35 is activated as an example of a switching point at which the fuel consumption of the vehicle deteriorates). Hereinafter, it is a bar graph indicating “engine start point P”).

  As shown in FIGS. 2 (a) and 2 (b), the fuel efficiency of the vehicle is low in the low opening state where the current accelerator pedal depression amount is below the engine start point P and in the vicinity of the engine start point P. Is displayed in a display method that keeps the state, for example, blue. On the other hand, as shown in FIG. 2C, in an excess state where the current accelerator pedal depression amount is greater than the engine start point P, the display method such as color is changed and displayed. In FIG. 2C, the color of only the excess portion is displayed in red, for example.

  3 (a) and 3 (b) are the same as FIGS. 2 (a) and 2 (b), but FIG. 3 (c) differs from FIG. On the other hand, in the excess state where the current depression amount of the accelerator pedal exceeds, the color of the entire depression amount is changed to red as well as the excess amount. As a result, the driver can be more conscious of engine startup.

  4 (a) is the same as FIG. 2 (a), but FIGS. 4 (b) and 4 (c) are different from FIGS. 2 (b) and 2 (c). Specifically, when the current depression amount of the accelerator pedal approaches a predetermined amount with respect to the engine start point P, the display method such as color is changed and displayed at this point. It is possible to visually announce to the driver that the engine 35 is about to start and the fuel consumption is reduced.

  Furthermore, by changing the display method of only the part approaching the engine starting point P to the predetermined amount and the part exceeding the engine starting point P, it is possible to determine how much the accelerator pedal is depressed. It can be displayed clearly.

  5 (b) and 5 (c), unlike FIGS. 4 (b) and 4 (c), the color of the entire stepping amount is changed to red as well as the approaching portion and the excess portion. As a result, the driver can be made more aware of the start of the engine or the fear thereof.

  With reference to FIGS. 6A to 6C, a display example of an amount displayed on the display device 45 by subtracting the current accelerator pedal depression amount from the engine start point P will be described. As shown in FIGS. 6 (a) and 6 (b), in a low opening state where the current accelerator pedal depression amount is lower than the engine start point P, and in the vicinity of the engine start point P, the vehicle Since the fuel consumption is good, a display method for maintaining the state is displayed, for example, in blue or the like, an amount obtained by subtracting the current depression amount of the accelerator pedal from the engine starting point P is displayed. On the other hand, as shown in FIG. 6C, in the excess state in which the current accelerator pedal depression amount exceeds the engine activation point P, the current accelerator pedal depression amount from the engine activation point P is increased. Since the amount obtained by subtracting is negative, the bar graph is not displayed. By shortening the bar graph or not displaying the bar graph, the driver can be made aware of engine startup.

7 (a) and 7 (c) are the same as FIGS. 6 (a) and 6 (c), but FIG. 7 (b) differs from FIG. On the other hand, when the current depression amount of the accelerator pedal approaches a predetermined amount, at this point, the display method such as color is changed and displayed.
It is possible to visually announce to the driver that the engine 35 is about to start and the fuel consumption is reduced.

  With reference to FIGS. 8A and 8B, the braking force of the vehicle according to the current depression amount of the brake pedal detected by the brake sensor 42 is divided into a regenerative braking amount and a friction braking amount. A display example to be displayed will be described. Regenerative braking and friction braking are displayed on different axes. In FIGS. 8A and 8B, the regenerative braking amount is displayed in the upper stage and the friction braking amount is displayed in the lower stage in different colors.

  As shown in FIG. 8 (a), when the current brake pedal depression amount detected by the brake sensor 42 is relatively small, the vehicle braking force corresponding to the depression amount can be obtained only by regenerative braking. In the device 45, only the regenerative braking amount is displayed as the braking force of the vehicle corresponding to the depression amount. On the other hand, as shown in FIG. 8B, the current depression amount of the brake pedal detected by the brake sensor 42 is relatively large, and the braking force of the vehicle corresponding to the depression amount is not enough for regenerative braking. If not obtained, the portion of the braking force of the vehicle that exceeds the regenerative braking amount corresponding to the depression amount is displayed on the display device 45 together with the regenerative braking amount as the friction braking amount. As a result, the driver can experience that the amount of friction braking is “loss”.

  As described above, when the amount of operation performed by the driver to adjust the vehicle speed is the amount of depression of the brake pedal, the switching point at which the fuel consumption of the vehicle deteriorates is that the braking force of the vehicle corresponding to the amount of depression of the brake pedal is regenerated. Corresponds to the point where the braking amount is exceeded.

  In FIGS. 9A and 9B, a bar graph showing the entire braking force of the vehicle, which is the sum of the regenerative braking amount and the friction braking amount, is displayed on an axis different from the regenerative braking amount and the friction braking amount. Therefore, from the top, a three-stage bar graph is displayed for the entire braking force, regenerative braking, and friction braking of the vehicle.

  10A and 10B show a case where the regenerative braking amount and the friction braking amount are displayed on the same axis. When the current brake pedal depression amount detected by the brake sensor 42 is relatively small and the vehicle braking force corresponding to the depression amount can be obtained only by regenerative braking, the display device 45 displays the corresponding depression amount. Only the regenerative braking amount is displayed as the braking force of the vehicle. On the other hand, as shown in FIG. 10B, the current depression amount of the brake pedal detected by the brake sensor 42 is relatively large, and the braking force of the vehicle corresponding to the depression amount is not enough for regenerative braking. If not obtained, the portion of the braking force of the vehicle that exceeds the regenerative braking amount corresponding to the depression amount is displayed on the display device 45 after the regenerative braking amount as the friction braking amount. That is, first, the regenerative braking amount is expressed, and the friction braking amount is displayed in addition to this. As a result, the driver can recognize that the amount of friction braking is “loss” and that the vehicle speed can be sufficiently reduced even during regenerative braking under normal conditions, resulting in improved fuel efficiency. Can contribute.

  As described above, according to the embodiment of the present invention, the following effects can be obtained.

  With respect to the current operation amount performed by the driver to adjust the vehicle speed, an operation amount serving as a switching point at which the fuel efficiency of the hybrid vehicle deteriorates is calculated, and the display device 45 is calculated by the current operation amount and the CPU 11. The operation amount that becomes the switching point is notified. As a result, an appropriate operation method is announced in order to improve the fuel efficiency in accordance with the driving operation of the driver, and the driver responds to this, thereby improving the driving skill of the driver, that is, improving the fuel efficiency.

Specifically, an accelerator pedal depression amount that is a switching point (engine activation point P) for starting the engine 35 is calculated with respect to the current accelerator pedal depression amount, and the calculated accelerator pedal depression amount and the current depression amount are calculated. The amount of stepping on is displayed. The hybrid vehicle can be driven by the power of the drive motor 33 even if the engine 35 is not started. To prevent the engine 35 from starting more than necessary, “the point where the engine 35 starts with the current accelerator work (accelerator Announcement of “opening degree” ”makes it possible for the driver to consciously perform motor traveling, and as a result, contributes to improvement in fuel consumption.

  When the current accelerator pedal depression amount exceeds the engine start point P, for example, the display method (color, expression, etc.) is switched before and after the excess. Thus, the engine 35 is started mainly due to the rough accelerator operation, and the driver can be made aware of the fuel-efficient driving by visually appealing that the fuel-saving driving cannot be performed.

  When the current depression amount of the accelerator pedal approaches the engine start point P by a predetermined amount (from the 0 direction), the notification method is changed before and after approaching the predetermined amount. As a result, the driver can be made aware of the low fuel consumption driving by visually announcing to the driver that the engine 35 is in a state of starting up and causing a reduction in fuel consumption.

  The difference between the current accelerator pedal depression amount and the engine start point P is calculated, and the calculated difference in depression amount is displayed. Displaying two parameters (the engine starting point P and the current depression amount) at the same time is complicated. Even if it is announced how much the accelerator pedal can be depressed until the engine 35 is started, that is, only the difference between the two is displayed, the fuel efficiency of the hybrid vehicle is sufficiently improved. Can be made.

  The current operation amount performed by the driver to adjust the vehicle speed may be the depression amount of the brake pedal in addition to the depression amount of the accelerator pedal. In this case, the vehicle braking force corresponding to the current depression amount of the brake pedal is calculated separately for regenerative braking and friction braking, and the vehicle is calculated separately for regenerative braking and friction braking. Is displayed on the display device 45. It is possible to announce to the driver that the friction braking component cannot be recovered and is “lost”. By being aware of this, the driver can learn the energy efficient brake pedal operation. Specifically, in order to generate the necessary braking force, the braking start point becomes slightly faster, and it is possible to learn a brake pedal operation method that compensates for the loss caused by friction braking.

  As shown in FIG. 10, the regenerative braking amount and the friction braking amount are displayed on the same axis. First, the regenerative braking amount is displayed, and the friction braking amount is displayed in addition to the regenerative braking amount. The driver can recognize that the amount of friction braking is “loss” and that the vehicle speed can be sufficiently reduced even under regenerative braking in the normal state, which can contribute to improved fuel efficiency. .

  As described above, the present invention has been described by way of one embodiment, but it should not be understood that the discussion and drawings that form part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

For example, the CPU 11 increases as at least one of the temperature of the cooling water for cooling the engine 35, the state of charge of the high-power battery 31, the vehicle speed of the hybrid vehicle, and the change speed (ΔAPO) of the accelerator pedal depression amount increases. The amount of depression of the accelerator pedal that serves as a switching point for starting the engine 35 may be calculated to be small. The engine start point P is set earlier as the accelerator operation speed (ΔAPO) is higher and earlier as the vehicle speed is higher, in addition to the temperature of the cooling water for cooling the engine 35 (engine water temperature) and the charged state of the high-power battery 31. As described above, since the engine start point P varies depending on various states of the vehicle, it is possible to visually announce a fuel-efficient driving method that always considers the vehicle state by incorporating this. Of course, it is not necessary for the driver to make an announcement at all times so that the driver can take full advantage of the surrounding safety, and a setting that can be displayed only when the driver makes an arbitrary selection may be used. .

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters according to the scope of claims reasonable from this disclosure.

11 CPU (control unit)
DESCRIPTION OF SYMBOLS 12 Auxiliary battery 21 Brake actuator 22a-22d Mechanical brake 31 High electric battery 32 Inverter 33 Drive motor (electric motor)
34 Generator 35 Engine (Internal combustion engine)
36 Transmission 43 DC / DC converter 44 Water temperature sensor 45 Display device (notification unit)
51a-51d tires

Claims (5)

In a hybrid vehicle that travels in combination with an internal combustion engine and an electric motor, a hybrid vehicle notification system that notifies the driver of the amount of operation performed by the driver to adjust the vehicle speed,
The amount of operation performed by the driver to adjust the vehicle speed is the amount of depression of the accelerator pedal,
A control unit that calculates an operation amount serving as a switching point at which the fuel consumption of the vehicle deteriorates with respect to the current operation amount;
A notifying unit for notifying the current operation amount and the operation amount to be the switching point calculated by the control unit;
With
The control unit calculates a depression amount of the accelerator pedal that is a switching point for starting the internal combustion engine with respect to a current depression amount of the accelerator pedal,
The notifying unit notifies the current depression amount and the calculated depression amount of the accelerator pedal, and the depression amount of the accelerator pedal at which the current depression amount of the accelerator pedal serves as a switching point for starting the internal combustion engine. When the amount is exceeded, the notification method is changed before and after the amount is exceeded. The informing unit changes the informing method before and after approaching a predetermined amount when the current amount of accelerator pedal depression approaches a predetermined amount of the accelerator pedal depression amount that is a switching point for starting the internal combustion engine. The hybrid vehicle notification system according to claim 1. The control unit starts the internal combustion engine as at least one of the temperature of cooling water for cooling the internal combustion engine, the state of charge of the high-power battery, the vehicle speed, and the change speed of the accelerator pedal depression amount increases. 3. The hybrid vehicle notification system according to claim 1, wherein the amount of depression of the accelerator pedal serving as a switching point is calculated to be small. As the operation amount of the driver performed in order to adjust the vehicle speed, in addition to the depression amount of the accelerator pedal, there is the degree of depression of the brake pedal,
The control unit calculates the braking force of the vehicle according to the current depression amount of the brake pedal, and divides the braking force into regenerative braking and friction braking,
The hybrid according to any one of claims 1 to 3, wherein the notification unit notifies the braking force of the vehicle calculated by dividing into regenerative braking and friction braking. Vehicle notification system. The said notification part displays a regenerative braking part and a friction braking part on the same axis | shaft, displays from a regenerative braking part first, and displays a friction braking part in the form added to this. Hybrid vehicle alarm system.

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