JP2020204315A - vehicle - Google Patents

Abstract

To provide a vehicle capable of reducing the damage of the vehicle caused by an accident, even if a driver panics during the driving of the vehicle.SOLUTION: A vehicle includes an engine, an accelerator pedal, an accelerator sensor, and a controller. The controller receives the input of information on an accelerator pedal depression amount from the accelerator sensor, and controls an opening of a throttle valve, thereby controlling engine output. The controller, between S0 where the depression amount is zero and the depression amount S3, gradually increases the opening of the throttle valve to increase the engine output, and makes the engine output the maximum driving force at S3. When the depression amount is between S3 and the maximum depression amount S4, the opening of the throttle valve is gradually decreases with respect to the increase in the depression amount, thereby gradually decreasing the engine output.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle, and particularly to a technique for controlling a traveling driving force of a vehicle.

An accident has occurred in which a driver who drives a vehicle accidentally continues to depress the accelerator pedal when he should depress the brake pedal. Various techniques have been proposed in order to suppress the occurrence of such accidents.

For example, Patent Document 1 discloses a technique in which a "release switch" is provided in the vicinity of the steering wheel, and the traveling speed of the vehicle is controlled by a coordinated operation of the "release switch" and the accelerator pedal.

Specifically, in the technique disclosed in Patent Document 1, when the traveling speed of the vehicle is less than a predetermined speed and the accelerator pedal is depressed when the release switch is not operated, the traveling speed of the vehicle is limited to the predetermined speed or less. .. On the other hand, when the traveling speed of the vehicle is less than a predetermined speed and the accelerator pedal is depressed when the release switch is operated, the limitation on the traveling speed of the vehicle is released.

Japanese Unexamined Patent Publication No. 2019-44650

However, with the technique disclosed in Patent Document 1, it is difficult to prevent an accident or reduce damage when the driver panics during driving. That is, if the driver panics while driving, it becomes difficult to move the limbs on his / her own will, and the accelerator pedal is further depressed with the release switch in the released state. Such a case may occur.

The present invention has been made to solve the above problems, and even if the driver panics while driving a vehicle, the damage caused by the accident of the vehicle is reduced. The purpose is to provide a vehicle that can drive.

The vehicle according to one aspect of the present invention is used for the operation of a driver and a drive source that generates a traveling driving force and outputs the traveling driving force to the wheels, and adjusts the traveling driving force. The driving unit that receives input of information on the accelerator unit, the accelerator detection unit that detects the operation amount of the accelerator unit by the operation of the driver, and the operation amount from the accelerator detection unit, and outputs the drive source. When a control unit for controlling the driving force is provided, the maximum operating amount of the accelerator unit is the maximum operating amount, and the maximum traveling driving force that can be output by the driving source is the maximum driving force. The control unit issues a command to the drive source to output the maximum driving force when the operation amount of the accelerator unit is larger than zero and the operation amount is smaller than the maximum operation amount. A command is issued to the drive source so that the traveling driving force is reduced from the intermediate operation amount toward the maximum operation amount.

In the above aspect, even if the driver panics while driving the vehicle, the damage caused by the accident of the vehicle can be reduced.

It is a schematic diagram which shows the schematic structure of the vehicle 1 which concerns on embodiment of this invention. It is a block diagram which shows a part of the control system in a vehicle 1. It is a characteristic diagram which shows the relationship between the depression amount of the accelerator pedal 19 and the opening degree of a throttle valve 102 stored in advance in a controller 21. It is a characteristic figure which shows the relationship between the depression amount of the accelerator pedal 19 which concerns on modification 1 and the opening degree of a throttle valve 102. It is a characteristic figure which shows the relationship between the depression amount of the accelerator pedal 19 which concerns on modification 2 and the opening degree of a throttle valve 102.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The forms described below are examples of the present invention, and the present invention is not limited to the following forms except for its essential configuration.

[Embodiment]
1. 1. Outline configuration of vehicle 1

The schematic configuration of the vehicle 1 according to the embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, the vehicle 1 includes an engine (for example, a gasoline engine) 10, a transmission 11, a differential gear 12, a drive shaft 13, wheels 14 to 17, a steering wheel 18, an accelerator pedal 19, a brake pedal 20, and The controller 21 is provided.

The engine 10 is a drive source that generates a traveling driving force and outputs the traveling driving force to the wheels 14 to 17 via the drive shaft 13. The engine 10 has an intake manifold 101 which is a passage for air taken into the cylinder of the engine 10. The amount of air supplied to the intake manifold 101 is controlled by the opening / closing operation of the throttle valve 102. In the engine 10, the traveling driving force for driving the vehicle 1 is controlled by the opening / closing operation of the throttle valve 102. That is, the engine 10 generates the maximum driving force when the throttle valve 102 is fully opened, and the smaller the opening degree, the smaller the traveling driving force generated by the engine 10.

The drive shaft 13 transmits the driving force from the engine 10 transmitted via the transmission 11 and the differential gear 12 to the left front wheel 14 and the right front wheel 15.

The accelerator pedal 19 is used for the operation of the driver and is an accelerator unit for adjusting the traveling driving force. An accelerator sensor (accelerator detection unit) 191 that detects the amount of depression (operation amount) by the driver is attached to the accelerator pedal 19.

The controller 21 is a control unit that receives input of information on the amount of depression (operation amount) of the accelerator pedal 19 from the accelerator sensor 191 and controls the traveling driving force output by the engine (drive source) 10, and is a CPU and a ROM. It is a microcomputer equipped with a memory consisting of a memory and a RAM. In the controller 21, the CPU executes various processes by referring to the programs and data stored in the memory.

In this embodiment, an FF (front engine / front drive) vehicle is taken as an example, but an FR (front engine / rear drive) vehicle, an MR (midship engine / rear drive) vehicle, and an RR (rear engine / rear) vehicle are used as an example. Of course, it is also possible to apply it to a drive) car.

2. 2. The system related to the traveling driving force control in the vehicle 1 The system related to the traveling driving force control in the vehicle 1 will be described with reference to FIG.

As shown in FIG. 2, when the driver driving the vehicle 1 depresses the accelerator pedal 19, the depressing amount (operation amount) is detected by the accelerator sensor 191. Then, the information (data) regarding the depression amount of the accelerator pedal 19 detected by the accelerator sensor 191 is sequentially input to the controller 21. The controller 21 that has received the input of information on the amount of depression controls the opening degree of the throttle valve 102 based on the information, thereby controlling the traveling driving force output by the engine 10.

3. 3. Characteristics showing the relationship between the depression amount of the accelerator pedal 19 and the opening degree of the throttle valve 102 The controller 21 stores in advance a characteristic showing the relationship between the depression amount of the accelerator pedal 19 and the opening degree of the throttle valve 102. The characteristics stored in the controller 21 will be described with reference to FIG.

As shown in FIG. 3, according to the characteristics stored in advance in the controller 21, the accelerator pedal 19 is not depressed by the driver, that is, the accelerator pedal 19 is depressed from the state of S0 where the depression amount (operation amount) is zero. Until the state of S1 in which the pedal 19 is slightly depressed, the controller 21 controls to maintain the opening degree of the throttle valve 102 in the state of zero (the state of F0). This is to prevent the vehicle 1 from starting undesirably if the driver lightly puts his / her foot on the accelerator pedal 19.

Next, when the driver depresses the accelerator pedal 19 from S1 to S3, the controller 21 changes the opening degree of the slot valve 102 from zero F0 to F1 in the fully open state based on the characteristic line L1. I will increase it. In the depression amount of the accelerator pedal 19, S3 is an intermediate depression amount (intermediate operation amount) larger than S0 and S1 and smaller than S4 which is the maximum depression amount (maximum operation amount).

When the opening degree of the throttle valve 102 becomes F1 which is fully opened, the maximum driving force allowed for the engine 10 is generated.

Next, when the driver further depresses the accelerator pedal 19, the controller 21 gradually reduces the opening degree of the slot valve 102 from F1 which is fully open based on the characteristic line L2, and the accelerator pedal In S4, which is the maximum stepping amount of 19 (so-called solid stepping state), the opening degree of the throttle valve 102 is set to F2, which is smaller than F1.

Here, in the present embodiment, regarding the stepping amount of the accelerator pedal 19, the stepping amount between S0 and S3 is the front stepping amount (front step operating amount), and the stepping amount between S3 and S4 is the rear step stepping amount (rear step operating amount).

As described above, the controller 21 of the vehicle 1 does not monotonically increase the opening degree of the throttle valve 102 as the amount of depression of the accelerator pedal 19 increases, but rather sets the throttle valve 102 at S3, which is an intermediate operation amount. It is fully opened, and when the driver further depresses the accelerator pedal 19, the opening degree of the throttle valve 102 is reduced so that the output of the engine 10 is reduced. In the vehicle 1, when the driver falls into a panic state while driving the vehicle by performing the above control by the controller 21, even if the amount of depression of the accelerator pedal 19 is further increased, the intermediate operation amount Since the output of the engine 10 is reduced from S3, which is the maximum operation amount, to S4, which is the maximum operation amount, the traveling speed of the vehicle 1 is suppressed from the maximum speed, and the damage in the event of an accident is reduced. Is possible.

As shown in FIG. 3, in the region where the depression amount of the accelerator pedal 19 is between S3 and S4, the driver escapes from the panic state and loosens the depression of the accelerator pedal 19. Like the characteristic lines LB1, LB2, and LB3, the opening degree of the throttle valve 102 is gradually reduced according to the amount of depression of the accelerator pedal 19. Then, when the amount of depression of the accelerator pedal 19 decreases and the intersection points P1, P2, and P3 with the characteristic line L1 are reached, the control based on the characteristic line L1 is restarted.

In the present embodiment, the stepping amount of the accelerator pedal 19 is set so that the stepping stroke amount between S0 and S3 is larger than the stepping stroke amount between S3 and S4. As a result, the area in which the driver depresses the accelerator pedal 19 in a normal state (normal state in which the driver does not panic or the like) corresponds to the amount of depression (operation amount) and the driving force output by the engine 10 (previous step depression). Amount) can be widened. Therefore, by widening the operating range of the accelerator pedal 19 in the normal state, it is difficult to impair the driver's feeling of operation.

[Modification 1]
The vehicle according to the first modification will be described with reference to FIG. Note that FIG. 4 illustrates a characteristic showing the relationship between the amount of depression of the accelerator pedal and the opening degree of the throttle valve, which is stored in advance in the controller of the vehicle according to the first modification. Other configurations of the vehicle are the same as those of the vehicle 1 according to the above embodiment.

As shown in FIG. 4, the difference from the above-described embodiment in the characteristic diagram is how to change the opening degree of the throttle valve depending on the amount of depression of the accelerator pedal in the latter stage between S3 and S4. Specifically, the characteristic line L2 in the above embodiment is a straight line, whereas the characteristic line L3 in this modification is an upwardly convex parabolic curve.

In this way, the degree of reduction in the opening degree of the throttle valve is increased as the driver depresses the accelerator pedal deeper than S3 in the post-stage depression amount (depression amount from S3 to S4). Therefore, in the vehicle according to the present modification, even if the driver panics and depresses the accelerator pedal deeply, the vehicle 1 according to the above embodiment plays by forcibly reducing the traveling speed of the vehicle. In addition to having the same effect as the effect, applying the engine brake can also help the driver to get out of the panic state.

[Modification 2]
The vehicle according to the second modification will be described with reference to FIG. Note that FIG. 5 illustrates a characteristic showing the relationship between the amount of depression of the accelerator pedal and the opening degree of the throttle valve, which is stored in advance in the controller of the vehicle according to the second modification. Other configurations of the vehicle are the same as those of the vehicle 1 according to the above embodiment.

As shown in FIG. 5, the difference between the above-described embodiment and the above-described modification 1 in the characteristic diagram is the change in the opening degree of the throttle valve when the accelerator pedal depression amount is between S3 and S4. How to make it. Specifically, the characteristic line L2 in the above embodiment is a straight line and the characteristic line L3 in the above modification 1 is an upward convex curve, whereas the characteristic line L5 in the present modification is a stepped characteristic line. It is said.

In this way, when the driver depresses the accelerator pedal deeply beyond S3 in the post-stage depression amount (depression amount from S3 to S4), the opening degree of the throttle valve is increased based on the stepped characteristic line L5. I am trying to reduce it. In the vehicle according to this modification, the characteristic line L5 is set as a stepped characteristic line, and the portions L51, L52, L53, and L54 in which the opening degree of the throttle valve is linearly reduced are set in a plurality of times. In addition to the effect of the vehicle 1 according to the above embodiment, it is possible to make the driver sense the danger and assist the driver in getting out of the panic state.

In this modified example, in the characteristic line L5, the degree of reduction in the opening degree of the throttle valve is larger in L52 than in L51, in L53 than in L52, and in L54 than in L53. As a result, the deeper the driver depresses the accelerator pedal, the more the driving force output from the engine is reduced, and thus the damage can be reduced even in the event of an accident.

[Other variants]
In the above-described embodiment and the above-described modified examples 1 and 2, an engine is adopted as an example as a drive source, but the present invention is not limited thereto. For example, in an electric vehicle (PEV, series type HEV), a motor as a driving source may be controlled as a driving force, and in a parallel hybrid, an engine and a motor as a driving source may be controlled as a driving force. ..

Further, in the above-described embodiment and the above-mentioned modified examples 1 and 2, as the characteristic line L1, a characteristic line in which the opening degree of the throttle valve increases monotonically from S1 to S3 is adopted, but the present invention is limited to this. I don't receive it. For example, it may be a downwardly convex parabolic curve or an upwardly convex parabolic curve.

Further, in the above-described embodiment and the above-mentioned modified examples 1 and 2, a four-wheeled vehicle is adopted as an example of the vehicle, but the present invention is not limited thereto. For example, a two-wheeled vehicle or a three-wheeled vehicle can be adopted, in which case the accelerator portion is operated by hand. Even in such a case, the same effect as described above can be obtained by adopting the above technique.

[Summary]
The vehicle according to one aspect of the present invention is used for the operation of a driver and a drive source that generates a traveling driving force and outputs the traveling driving force to the wheels, and adjusts the traveling driving force. The driving unit that receives input of information on the accelerator unit, the accelerator detection unit that detects the operation amount of the accelerator unit by the operation of the driver, and the operation amount from the accelerator detection unit, and outputs the drive source. When a control unit for controlling the driving force is provided, the maximum operating amount of the accelerator unit is the maximum operating amount, and the maximum traveling driving force that can be output by the driving source is the maximum driving force. The control unit issues a command to the drive source to output the maximum driving force when the operation amount of the accelerator unit is larger than zero and the operation amount is smaller than the maximum operation amount. A command is issued to the drive source so that the traveling driving force is reduced from the intermediate operation amount toward the maximum operation amount.

In a vehicle having the above configuration, when the driver panics while driving the vehicle, the traveling driving force becomes maximum after the intermediate operation amount even if the operation amount of the accelerator portion is further increased. Since the driving force is controlled to be reduced, the traveling speed of the vehicle is suppressed from the maximum speed, and the damage in the event of an accident can be reduced.

In the above aspect, the pre-stage operation amount from the state where the operation amount is zero to the intermediate operation amount is larger than the post-stage operation amount from the intermediate operation amount to the maximum operation amount.
When the above configuration is adopted, it is possible to widen the range in which the operating amount of the accelerator portion and the traveling driving force correspond to each other in a normal state (a normal state in which the driver does not fall into a panic state or the like). Therefore, by widening the operating range of the accelerator portion in the normal state, it is difficult to impair the driver's feeling of operation.

In the above embodiment, assuming a characteristic diagram in which the horizontal axis represents the manipulated variable and the vertical axis represents the traveling driving force, the control unit may perform the operation between the intermediate manipulated variable and the maximum manipulated variable. A command is issued to the drive source so that the traveling driving force is reduced stepwise.

When the above configuration is adopted, the traveling driving force is reduced stepwise as the operation amount increases between the intermediate operation amount and the maximum operation amount, so that the driver has a clear sense of deceleration. Can be granted. Therefore, it is effective in relieving the driver's panic state.

1 ・ ・ Vehicle 10 ・ ・ Engine 19 ・ ・ Accelerator pedal 21 ・ ・ Controller 102 ・ ・ Throttle valve 191 ・ ・ Accelerator sensor

Claims (3)

A drive source that generates driving force and outputs the driving force to the wheels.
The accelerator unit, which is used for the operation of the driver and for adjusting the driving force,
An accelerator detection unit that detects the amount of operation of the accelerator unit by the operation of the driver, and
A control unit that receives input of information on the operation amount from the accelerator detection unit and controls the traveling driving force output by the drive source.
With
When the maximum operating amount of the accelerator portion is set as the maximum operating amount and the maximum traveling driving force that can be output by the driving source is set as the maximum driving force.
The control unit issues a command to output the maximum driving force to the driving source when the operating amount of the accelerator unit is larger than zero and the operating amount is smaller than the maximum operating amount. , Issuing a command to the drive source so that the traveling driving force is reduced from the intermediate operation amount to the maximum operation amount.
vehicle. The pre-stage operation amount from the state where the operation amount is zero to the intermediate operation amount is larger than the post-stage operation amount from the intermediate operation amount to the maximum operation amount.
The vehicle according to claim 1. Assuming a characteristic diagram in which the operation amount is taken on the horizontal axis and the traveling driving force is taken on the vertical axis, the control unit has the traveling driving force between the intermediate operation amount and the maximum operation amount. Issue a command to the drive source so that
The vehicle according to claim 1 or 2.

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