JP2020084783A - Drive support device - Google Patents

Abstract

To provide a vehicle support device that can avoid excessive rise in vehicle speed while allowing rise to a predetermined vehicle speed when an accelerator pedal is erroneously stepped down deeply more than necessary, for example, while a vehicle is driven in reverse.SOLUTION: When a predetermined vehicle speed is exceeded while a vehicle is driven in reverse, a drive support device 10 outputs a pseudo accelerator pedal opening signal that is equivalent to full close of a throttle valve 5 instead of an accelerator pedal opening signal to be input.SELECTED DRAWING: Figure 1

Description

The present invention relates to a driving support device.

For example, Patent Document 1 describes that when the accelerator pedal is suddenly depressed or fully depressed, the control mode is entered. In the control mode, the engine is forcibly stopped or lowered to the idling speed to prevent sudden start.

For example, Patent Document 2 describes that a sudden start of a vehicle is prevented by suppressing the operation of a throttle valve even when a sudden accelerator operation is performed.

JP, 2010-009516, A JP, 9-287488, A

In Patent Document 1, when the accelerator opening does not exceed the predetermined value (80%), the pseudo signal is not output, and therefore there is a risk of sudden start. Further, in Patent Document 2, although the vehicle can move because the operation of the throttle valve is simply suppressed, there is a concern that the vehicle cannot be raised to a predetermined speed. There is room for improvement here.

In view of such circumstances, the present invention makes it possible to avoid an excessive increase in vehicle speed while allowing an increase to a predetermined vehicle speed when the accelerator pedal is accidentally depressed deeper than necessary while the vehicle is moving backward. The purpose of the present invention is to provide a vehicle support device that operates.

The vehicle assistance device according to the present invention outputs a pseudo accelerator pedal opening signal corresponding to full closing of the throttle valve instead of the input accelerator pedal opening signal when the vehicle speed exceeds a predetermined value while the vehicle is moving backward. The feature is that

In this configuration, in short, an excessive increase in vehicle speed is suppressed based on the vehicle speed rather than the accelerator pedal opening. As a result, when the accelerator pedal is accidentally depressed deeper than necessary while the vehicle is moving in reverse, it is possible to avoid an excessive increase in vehicle speed while allowing an increase in vehicle speed to a predetermined value.

The case where the accelerator pedal is erroneously depressed deeper than necessary is not limited to the case where the accelerator pedal opening is 100%, and includes other cases.

If, for example, the accelerator pedal opening for making the vehicle speed easy to control the vehicle behavior during reverse travel is used as a reference, the case where the accelerator pedal is depressed deeper than necessary as described above means It means that the accelerator pedal opening is not less than 100% and not more than 100%. Further, since the reference accelerator pedal opening is different for each driver, it is preferable to check and specify the average value of many drivers.

By the way, the driving assistance device according to the present invention includes an output unit that outputs an accelerator pedal opening signal corresponding to the opening of the accelerator pedal, and an adjusting unit that adjusts the opening of the throttle valve based on the accelerator pedal opening signal. , Can be installed in a vehicle having.

This driving support device includes a pseudo signal generation unit that generates a pseudo accelerator pedal opening signal corresponding to the full closing of a throttle valve, and a non-output unit that directly outputs the accelerator pedal opening signal input from the output unit to the adjustment unit. A support state, or a switching unit for switching to a support state in which a pseudo accelerator pedal opening signal generated by the pseudo signal generating unit instead of the accelerator pedal opening signal input from the output unit is input to the adjusting unit. When the first to third conditions are all determined to be satisfied, the pseudo signal generation unit causes the pseudo accelerator pedal opening signal to be generated and the driving support function for setting the switching unit to the support state is started. The control unit may be configured to include a function end requesting unit that outputs an end request signal of the driving support function when a human operation is performed.

The control unit determines that all of the first to third conditions are satisfied, and the start determination unit determines that all of the first to third conditions are satisfied. In some cases, a support starting unit that starts executing the driving support function may be included.

The case where the first condition is satisfied means that the end request signal is not input from the function end request means. The case where the second condition is satisfied is a case where a shift signal indicating the reverse range is input. The case where the third condition is satisfied is a case where the vehicle speed becomes equal to or higher than a predetermined upper limit set speed.

The control unit further determines an end determination unit that determines whether any one of the fourth to sixth conditions is satisfied during execution of the driving support function, and the end determination unit determines the fourth to sixth conditions. Support termination means for terminating the driving assistance function when it is determined that any one of the conditions is satisfied can be configured.

The case where the fourth condition is satisfied means that a shift signal other than the reverse range is input. The case where the fifth condition is satisfied is a case where the vehicle speed becomes equal to or lower than a predetermined lower limit set speed. The case where the sixth condition is satisfied means that the accelerator pedal opening input from the output unit is equal to or less than a predetermined value (for example, 10%) and the end request signal is input from the function end request means. That is.

Further, ending the driving support function means putting the switching unit in the non-support state.

According to the present invention, there is provided a vehicle assistance device capable of avoiding an excessive increase in vehicle speed while allowing an increase to a predetermined vehicle speed when the accelerator pedal is accidentally depressed deeper than necessary while the vehicle is moving backward. can do.

It is a schematic block diagram which shows one Embodiment of the driving assistance device which concerns on this invention. It is a figure which shows the external appearance of the display part of FIG. It is a figure for demonstrating operation|movement of the driving assistance device of FIG. 1, (a) has shown the accelerator pedal opening, (b) has shown vehicle speed. It is a figure which shows the state before retrofitting to the vehicle which is not equipped with the driving assistance device which concerns on this invention. It is a figure which shows the state retrofitted from the state of FIG. 4 to the vehicle which is not equipped with the driving assistance device.

BEST MODES FOR CARRYING OUT THE INVENTION Hereinafter, best modes for carrying out the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show one embodiment of the present invention. In the figure, 10 indicates the entire driving support device.

The driving support device 10 is a device that assists driving so as to eliminate a problem when the accelerator pedal 1 is accidentally stepped deeper than necessary, and the wiring 4 that connects the output unit 2 and the adjustment unit 3 is used. Is intervened in the middle of.

The output unit 2 outputs an accelerator pedal opening signal corresponding to the depression amount of the accelerator pedal 1.

The adjusting unit 3 adjusts the opening of the input electronically controlled throttle valve 5 based on the accelerator pedal opening signal output from the output unit 2 or the pseudo accelerator pedal opening output from the pseudo signal generating unit 12 described below. Which is, for example, an engine control ECU or the like.

The driving support device 10 is in a standby state in which it can be operated by being energized when a driving switch (start switch) (not shown) is turned on, and as shown in FIG. (Function end request means) 11, a pseudo signal generation unit 12, a switching unit 13, a display unit 14, a control unit 15, and the like.

The function off switch 11 outputs a termination request signal (off signal) for terminating the operation of the driving support device 10 when it is pushed (off) by the driver. Although not shown, the function off switch 11 is installed on, for example, the dashboard of the vehicle compartment, the steering wheel, the display unit 14, or the like.

The pseudo signal generator 12 generates and outputs a pseudo accelerator pedal opening signal. The pseudo accelerator pedal opening signal is a signal representing 0% of the accelerator pedal opening for fully closing the throttle valve 5.

The switching unit 13 is a switch that switches to a non-support state or a support state. The output terminal of the output unit 2 is connected to the input terminal of the switching unit 13, and the input terminal of the adjustment unit 3 is connected to the output terminal of the switching unit 13.

The non-support state is a state in which the accelerator pedal opening signal input from the output unit 2 is output to the adjustment unit 3 as it is, as shown by the chain double-dashed line in FIG.

Further, the support state means that the pseudo accelerator pedal opening signal generated by the pseudo signal generating unit 12 instead of the accelerator pedal opening signal input from the output unit 2 is adjusted by the adjusting unit, as shown by the solid line in FIG. It is a state of inputting to 3.

As shown in FIG. 2, the display unit 14 has a power lamp 21, an OFF lamp 22, an output lamp 23, a failure lamp 24, and the like.

The power lamp 21 is turned on when an operation switch (not shown) is turned on, and is turned off when the operation switch is turned off.

The OFF lamp 22 is turned on when the driving assistance function is ended due to the function off switch 11 being pushed (off), while the function off switch 11 is not pushed (off). At this time or when the operation switch is turned off, the light is turned off.

The outputting lamp 23 is turned on when the pseudo signal generation unit 12 outputs the pseudo accelerator pedal opening signal to the adjustment unit 3, while the pseudo signal generation unit 12 outputs the pseudo accelerator pedal opening signal to the adjustment unit 3. When the operation switch is turned off, the light is turned off.

The failure lamp 24 is turned on when the driving support device 10 recognizes a failure, while the driving lamp is not operated (when the driving support device 10 is recognizing the failure) (normal operation) or the operation switch is turned off. Sometimes it goes off.

When the control unit 15 determines that all of the following first to third conditions are satisfied, the control unit 15 starts executing the following driving support function, while any of the following fourth to sixth conditions is executed during execution of the driving support function. When it is determined that one of them is established, the driving support function is ended.

The case where the first condition is satisfied is a case where the OFF signal is not input from the function OFF switch 11.

The case where the second condition is satisfied is a case where the shift signal representing the reverse range is input from the shift lever 6.

The case where the third condition is satisfied means that the vehicle speed becomes equal to or higher than a predetermined upper limit set speed (which is arbitrary, for example, 5 km/h) based on the vehicle speed signal input from the speedometer 7. is there.

The case where the fourth condition is satisfied is the case where a shift signal indicating a signal other than the reverse range is input from the shift lever 6.

The case where the fifth condition is satisfied is a case where the vehicle speed becomes equal to or lower than a predetermined lower limit set speed (arbitrary, for example, 3 km/h) based on the vehicle speed signal input from the speedometer 7. is there.

The case where the sixth condition is satisfied is a case where the accelerator pedal opening input from the output unit 2 is equal to or smaller than a predetermined value (for example, 10%) and an off signal is input from the function off switch 11. ..

Although not shown in detail, the control unit 15 includes a central processing unit (CPU), a non-volatile storage device (Read Only Memory: ROM), a temporary storage device (Random Access Memory: RAM), and the like. ing.

The ROM stores various control programs and maps referred to when executing the various control programs. The CPU executes arithmetic processing based on various control programs and maps stored in the ROM. The RAM is a memory for temporarily storing the calculation result of the CPU, data input from each sensor, and the like.

Next, the driving support function of the control unit 15 will be described in detail.

First, when a driving switch (start switch) (not shown) is turned on, the driving assist device 10 is energized to enter a standby state in which it can operate, and the power lamp 21 of the display unit 14 is turned on. In addition, when the operation switch is turned off, all the lamps 21 to 24 of the display unit 14 are turned off.

Here, the control unit 15 starts executing the driving support function when it is determined that all of the first to third conditions are satisfied.

When the execution of the driving support function is started, the switching signal is generated by the pseudo signal generation unit 12 instead of the accelerator pedal opening signal input from the output unit 2 by setting the switching unit 13 to the support state (see the solid line in FIG. 1). This means that the pseudo accelerator pedal opening signal (0% accelerator pedal opening) being output is output to the adjusting unit 3 and the lamp 23 during output of the display unit 14 is turned on.

On the other hand, when the control unit 15 determines that any one of the fourth to sixth conditions is satisfied, the control unit 15 ends the driving support function.

To end this driving support function means to switch the switching unit 13 to the non-supporting state (see the chain double-dashed line in FIG. 1) to cause the adjusting unit 3 to output the accelerator pedal opening signal input from the output unit 2 as it is. , Means that the output lamp 23 is turned off.

Specifically, for example, when the accelerator pedal 1 is accidentally depressed deeper than necessary (for example, the accelerator pedal opening is 100%) while the vehicle is moving backward, as shown in FIG. As shown in (b), although the vehicle speed input from the speedometer 7 is allowed to increase until reaching the upper limit set speed (for example, 5 km/h), when the vehicle speed reaches the upper limit set speed, By starting execution of the driving support function, a pseudo accelerator pedal opening signal with an accelerator pedal opening of 0% is input to the adjusting unit 3. As a result, the vehicle speed starts to decrease after overshooting so that the vehicle speed exceeds the upper limit set speed by a predetermined amount due to the time lag.

Thereafter, when the vehicle speed becomes equal to or lower than the lower limit set speed (for example, 3 km/h), the accelerator pedal opening (100%) input from the output unit 2 is input to the adjustment unit 3 by ending the driving support function. As a result, as shown in FIG. 3(b), the vehicle speed starts to increase after an undershoot so that the vehicle speed falls below the set speed by a predetermined amount due to a time lag.

As described above, the control unit 15 repeats the execution and the end of the driving support function according to the vehicle speed, so that the vehicle speed up to the upper limit set speed is irrespective of the accelerator pedal opening input from the output unit 2 to the control unit 15. It is possible to prevent an excessive increase in speed after exceeding the upper limit set speed while allowing the increase in

By the way, the control unit 15 executes the driving support function as described above when the sixth condition is satisfied during execution of the driving support function (when all of the first to third conditions are satisfied). In addition to the above, the OFF lamp 22 of the display unit 14 is turned on.

Further, the control unit 15 continues the driving support function even when the driving support device 10 recognizes a failure when all of the first to third conditions are satisfied, that is, while the driving support function is being executed. However, when it is determined that any one of the fourth to sixth conditions is satisfied, the driving support function is ended and the failure lamp 24 of the display unit 14 is turned on, so that the driver can drive the driving support device. Notify that 10 is not operating normally. This process corresponds to the fail safe function.

As described above, according to the driving support device 10 of the embodiment to which the present invention is applied, when the driver mistakenly depresses the accelerator pedal 1 deeper than necessary while the vehicle is moving backward, By performing the driving support function based on the vehicle speed, it is possible to avoid an excessive increase in vehicle speed after the upper limit set speed is exceeded, while allowing an increase to the upper limit set speed (for example, 5 km/h).

Thereby, in particular, according to the driving support device 10 of this embodiment, when the driver accidentally depresses the accelerator pedal 1 deeper than necessary, for example, in a situation in which the vehicle is going uphill in reverse. By performing the driving assistance function based on the vehicle speed, it is possible to prevent the vehicle from climbing uphill and becoming out of control, and avoiding the problem of the vehicle slipping down. Become.

Moreover, according to the driving support device 10 of the present embodiment, when the driver intentionally deeply depresses the accelerator pedal 1 while the vehicle is moving in reverse (accelerator pedal opening degree 100%), the display unit 14 displays. Since the output lamp 23 is turned on, the driver can understand that the driving support function is being executed by visually checking the output lamp 23. Therefore, the vehicle control abnormality occurs in the driver. You can avoid misunderstanding.

It should be noted that the present invention is not limited to the above-described embodiment, but can be appropriately modified within the scope of the claims and a range equivalent to the scope.

(1) The driving support device 10 shown in the above embodiment can be installed from the beginning of manufacturing a vehicle, but the driving support device 10 can be retrofitted to a vehicle that has not been installed from the beginning of manufacturing.

Specifically, with reference to FIG. 4 and FIG. 5, a state in which the driving support device 10 is retrofitted to a vehicle that has not been equipped from the beginning of manufacturing will be described.

As shown in FIGS. 4 and 5, the wiring 4 for connecting the output unit 2 and the adjusting unit 3 of the vehicle is configured to have the socket 4a at one end and the socket 4b at the other end. The output plug 2a of the output unit 2 is connected to the socket 4a of the wiring 4, and the input plug 3a of the adjustment unit 3 is connected to the socket 4b of the wiring 4.

On the other hand, in the driving support device 10, the switching unit 13 is provided with the input socket 13a and the output plug 13b. The internal structure of the driving support device 10 is basically the same as that of the embodiment shown in FIG.

Then, as shown in FIG. 4, when retrofitting the driving assistance device 10 to a vehicle that is not equipped with the driving assistance device 10, first, the socket 4a of the wiring 4 is removed from the output plug 2a of the output unit 2, As shown in FIG. 5, the socket 4a is connected to the output plug 13b of the switching unit 13 of the driving support device 10, and the input socket 13a of the switching unit 13 of the driving support device 10 is connected to the output plug 2a of the output unit 2. Connecting. As a result, the driving support device 10 is retrofitted to a vehicle that is not equipped with the driving support device 10.

(2) In the above-described embodiment, an example is given in which the failure lamp 24 is turned on when the driving support device 10 recognizes a failure, but the present invention is not limited to this.

For example, when the driving support device 10 recognizes a failure, the failure lamp 24 may be turned on, and an alarm device such as a buzzer (not shown) may be activated to generate a warning sound.

Further, for example, the failure lamp 24 may be eliminated, and when the driving support device 10 recognizes a failure, only a warning device such as a buzzer (not shown) is activated to generate a warning sound.

(3) In the above-described embodiment, when the control unit 15 recognizes the input of the off signal from the function off switch 11, the accelerator pedal opening input from the output unit 2 is equal to or less than a predetermined value (for example, 10%). However, the present invention is not limited to this. For example, the driving support device 10 not equipped with the function off switch 11 is also included in the present invention.

(4) The driving support device 10 according to the present invention can be applied to either a vehicle having only an engine as a drive source or a vehicle having an engine and a motor as drive sources.

INDUSTRIAL APPLICATION This invention can be utilized suitably for a driving assistance device.

1 accelerator pedal 2 output part 3 adjusting part 4 wiring 5 throttle valve 6 shift lever 7 speedometer 10 driving support device
11 Function off switch
12 Pseudo signal generator
13 Switching unit
14 Display
21 Power lamp
22 OFF lamp
23 Output lamp
24 failure lamp
15 Control unit

Claims (1)

When the vehicle speed exceeds a predetermined value while the vehicle is moving backward, a pseudo accelerator pedal opening signal corresponding to the full closing of the throttle valve is output instead of the input accelerator pedal opening signal, which is a driving assistance. apparatus.

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