JP6968403B2 - Accelerator signal control device and accelerator signal control method - Google Patents

Description

The present invention relates to a sudden start prevention device, specifically, a sudden start prevention device that is useful for preventing a sudden start of a vehicle due to an erroneous operation of an accelerator pedal.

FIG. 6 is a block diagram illustrating the engine output control system of the vehicle, and FIG. 7 is a block diagram illustrating the braking system of the vehicle. As shown in FIG. 6, the engine output control system of the vehicle is an engine based on an accelerator signal generation unit 10 that outputs an accelerator signal at a level corresponding to the accelerator pedal depression amount and an accelerator signal output by the accelerator signal generation unit 10. It includes an engine control unit (ECU) 20 that controls the output, and a vehicle speed sensor 30 that outputs a vehicle speed pulse signal. According to this engine output control system, the output of the engine 40 is increased or decreased according to the increase or decrease of the accelerator pedal depression amount. Further, as shown in FIG. 7, in the braking system of the vehicle, the brake switch 60 is turned on and off by depressing and releasing the brake pedal 50, and the braking mechanism 70 exhibits a braking state having a strength corresponding to the depressing amount of the brake pedal 50. .. Normally, the accelerator pedal and the brake pedal 50 described above are installed at adjacent positions at the feet of the driver's seat.

In such a vehicle, the driver may perform an erroneous operation such as depressing the accelerator pedal against the intention of braking while the vehicle is stopped or running, and when such a situation occurs, the vehicle is against the intention of the driver. Will be accelerated without braking. Moreover, under such circumstances, the driver may panic, and an erroneous operation may occur, causing the accelerator pedal to be mistaken for the brake pedal 50 and suddenly depressed, resulting in a sudden start or acceleration of the vehicle. sell. Accidents caused by such a situation have occurred frequently in recent years, and it is urgently necessary for elderly people to take measures to prevent the above situation.

Under such circumstances, as a prior example, a sudden start prevention device has been proposed in which a pseudo-accelerator signal corresponding to an accelerator signal is output to the ECU (see, for example, Patent Document 1). In the sudden start prevention device proposed by Patent Document 1, the driver manually operates a mode switch to switch between a safety mode execution means for preventing sudden start and a normal mode execution means for performing normal driving. The method is adopted. Further, Patent Document 1 does not clarify the processing under the condition that the accelerator pedal and the brake pedal are depressed at the same time.

Japanese Patent No. 5231156

In the sudden start prevention device proposed by Patent Document 1 described above, a method is adopted in which the driver manually operates the mode switch to switch between the safety mode execution means and the normal mode execution means as described above. .. However, according to this method, for example, a driver who was driving on a highway in normal mode forgets to switch to safety mode when leaving the highway and stopping a vehicle or driving at low speed. There is. Therefore, even though the vehicle is equipped with a sudden start prevention device, it may not be possible to take full advantage of the device. In addition, when the accelerator pedal and the brake pedal are depressed at the same time for some reason, the engine output due to the depression of the accelerator pedal exceeds the braking force associated with the depression of the brake pedal, and the vehicle runs against the driver's intention. It is possible that you will end up doing it.

The present invention has been made in view of the above circumstances, and the fluctuation range of the accelerator signal is grasped by two patterns of abnormal fluctuation (abnormal operation) and normal fluctuation (normal operation), and the accelerator signal at that time is captured at the time of abnormal fluctuation. It is an object of the present invention to provide a sudden start prevention device which can surely suppress a sudden increase in engine output by canceling or the like and can obtain an engine output corresponding to an accelerator signal at the time of normal fluctuation.
Further, the present invention provides a sudden start prevention device capable of ensuring safety by giving priority to the depressing operation of the brake pedal when the accelerator pedal and the brake pedal are simultaneously depressed for some reason. I am aiming.

Further, according to the present invention, in addition to the above-mentioned matters or as a control separate from the above-mentioned matters, when the accelerator operation in which the output of the engine is higher than usual at the start of movement of the vehicle such as starting on a slope or overcoming a step is performed. It is an object of the present invention to provide an accelerator signal control device and an accelerator signal control method for controlling an accelerator signal without determining that the operation is abnormal.
The present invention also provides an accelerator signal control device and an accelerator signal control method capable of limiting accelerator control and speed even in reverse (back) as a control in addition to or separately from the above items. Is the subject.

In order to solve the above problems, the present invention has the following items. That is,
In a vehicle that adjusts the engine output based on the accelerator opening information output according to the accelerator depression amount, which is an accelerator signal control method, when the opening information exceeds the set amount of increase per unit time. An accelerator signal control means for executing emergency control for limiting or invalidating the opening degree information is provided, and a reference opening degree of 1 or 2 or more is set in the accelerator opening degree information, and the reference opening degree is exceeded. In some cases, the emergency control according to the reference opening degree is configured to be feasible.

In addition, the present invention has the following items. That is,
An accelerator signal control device, which is an accelerator signal control device provided in a vehicle that adjusts the engine output based on the accelerator opening information output according to the amount of depression of the accelerator, and is a unit time set by the opening information. It is configured to execute an emergency control that limits or invalidates the opening degree information when the amount of increase per hit is exceeded, and a reference opening degree of 1 or 2 or more is set in the accelerator opening degree information, and the reference is made. It is characterized in that the emergency control according to the reference opening can be executed when the opening is exceeded.

In addition, the present invention has the following items. That is,
In a vehicle that adjusts the engine output based on the accelerator opening information that is output according to the amount of depression of the accelerator, which is an accelerator signal control method, the upper limit of speed or engine speed is set when the vehicle is moved backward. However, it is characterized in that the opening degree information is restricted or invalidated so as not to exceed the upper limit value.

In addition, the present invention has the following items. That is,
In a vehicle that is an accelerator signal control device and adjusts the engine output based on the accelerator opening information output according to the amount of depression of the accelerator, the upper limit of speed or engine speed is set when the vehicle is moved backward. However, it is characterized in that the opening degree information is restricted or invalidated so as not to exceed the upper limit value.

Since the present invention provides an uncontrolled area in which emergency control is not performed when the input voltage is less than the set value, the accelerator is depressed by the driver's intentional accelerator operation such as starting on a slope or overcoming a step. The case can be excluded from the target of emergency control, and it has the effect of not interfering with normal driving operation.
Further, by setting an upper limit of the vehicle speed when reversing, it has an effect that the occurrence of an accident due to reverse movement can be suppressed.

It is a block diagram which illustrates the engine output control system of the vehicle equipped with the sudden start prevention device which concerns on this invention. It is a wiring connection diagram of the sudden start prevention device. It is a graph which showed the outline of the accelerator signal control method by the accelerator signal control device which concerns on this embodiment. It is a flow chart of the over-accelerator canceller means. It is a flow chart of the brake override means. It is a block diagram which exemplifies the engine output control system of a vehicle. It is a block diagram which illustrates the braking system of a vehicle.

FIG. 1 is a block diagram illustrating an engine output control system of a vehicle equipped with a sudden start prevention device 100 constituting an accelerator signal control according to the present invention. In the figure, the accelerator signal generation unit 10 outputs accelerator opening degree information (also referred to as “accelerator signal”, “throttle opening degree information”, etc.) at a level corresponding to the amount of depression of the accelerator pedal (not shown). The accelerator pedal is provided in the accelerator signal generation unit 10 and constitutes an electronically controlled accelerator.
The accelerator signal is detected as a voltage that rises according to the amount of depression of the accelerator pedal. That is, a voltage corresponding to the amount of depression of the accelerator pedal is output from the accelerator signal generation unit 10, and in the case of a general vehicle, the engine control unit (ECU) 20 controls the throttle valve or the like according to this voltage. Controls the output of the engine 40.
Further, the ECU 20 is configured around a microcomputer (microcomputer), and acquires information from a vehicle speed sensor 30 that outputs a vehicle speed pulse signal to detect the vehicle speed of the vehicle.
Further, in a general vehicle, a brake pedal (not shown) for braking is installed adjacent to the accelerator pedal. The sudden start prevention device 100 is interposed between the accelerator signal generation unit 10 and the ECU 20 in a state of blocking the signal path connecting the accelerator signal generation unit 10 and the ECU 20.

FIG. 2 is a wiring connection diagram of the sudden start prevention device 100 constituting the accelerator signal control device. In the sudden start prevention device 100 shown in the figure, the main body 110 is mainly composed of a microcomputer having a built-in ROM and RAM.
An accelerator signal path 120 for inputting an accelerator signal output by an accelerator signal generation unit 10 provided with an accelerator pedal 11 is connected to the main body 110 via a connector 121, and extends from the main body 110. The command signal path 130 is connected to the ECU 20 via the connector 131. With this configuration, the sudden start prevention device 100 is interposed between the accelerator signal generation unit 10 and the ECU 20 in a state of blocking the signal path connecting the accelerator signal generation unit 10 and the ECU 20.

Further, the main body 110 has a power supply circuit (not shown) to which a power supply line 141 extending from the vehicle-mounted battery and a ground wire 142 are connected. Further, the main body 110 is connected to a vehicle speed signal path 151 for inputting a vehicle speed pulse signal output by the vehicle speed sensor 30, and a brake signal path 161 extending from the brake switch 60 of the brake pedal 50.

The over-accelerator canceller means (OAC) and the brake override means (BOS) are configured by the microcomputer built in the main body 110.

FIG. 3 is a graph showing an outline of an accelerator signal control method by the accelerator signal control device according to the present embodiment.
In this graph, the accelerator opening degree information detected by the sudden start prevention device 100 is shown, the vertical axis represents the voltage output by the accelerator signal generation unit 10 constituting the accelerator opening degree information, and the horizontal axis represents time. .. The voltage is sampled every minute time set across the detection clock of the microcomputer. V-max is the maximum value of the voltage representing the case where the accelerator is most depressed in the vehicle, and the accelerator opening degree information fluctuates within the range of 0 (v) to V-max.
FIG. 3 shows three types of models (m1, m2, m3) for the accelerator opening degree information to be detected. Although the actual accelerator control when the vehicle is driven is not necessarily represented in a straight line, the basic configuration of the present invention can be explained by this graph.

The sudden start prevention device 100 is for preventing a sudden start unintentional by the driver from a state in which the vehicle is stopped (vehicle speed = 0) or a vehicle speed at which a human walks due to idling (vehicle speed = less than 10 km / h). It is a device. Therefore, in order to detect a sudden start, it is determined whether or not the voltage fluctuation is due to an abnormal operation when the accelerator is operated from fully closed to fully open, that is, when the voltage rises. In the present embodiment, it is determined whether or not the voltage fluctuation is due to an abnormal operation based on the rate of increase in the voltage fluctuation. That is, when the amount of increase in the voltage, which is the accelerator opening information, per unit time exceeds the set value, emergency control is performed as an abnormal operation. As an example of this emergency control, there are a method of limiting the voltage output as accelerator opening information to a certain voltage or less, and a method of invalidating the output voltage (outputting the voltage as 0). As these emergency control methods, the optimum method is selected according to the combination with other control modes and the like.

The graph shown in FIG. 3 shows a case where the model m1 is judged to be an abnormal operation, a case where the model m2 can select whether or not to include the abnormal operation by an arbitrary setting, and a case where the model m3 is judged to be a normal operation. .. As described above, whether or not the accelerator operation is abnormal is determined based on the amount of increase in voltage per unit time (Δv), that is, the rate of increase.
For example, the rate of increase a1 of the model m1 is calculated by a1 = Δv / t1, the rate of increase a2 of the model m2 is calculated by a2 = Δv / t2, and the rate of increase a3 of the model m3 is a3 = Δv / t3. It is calculated.
In the explanation using the graph shown in FIG. 3, Δv is calculated by Δv = v3-v0, but when calculating the above-mentioned increase rate, it is not always necessary to wait until the voltage value reaches v3. If an increase rate that can be determined to be abnormal is detected in a short time in the process of voltage increase, processing is performed accordingly.

The model m1 has a high climb rate and it can be determined that a sudden accelerator depression operation has been performed. When such a rise rate is detected, measures such as invalidating the accelerator operation by the driver are taken. Will be.
On the other hand, when starting on a steep slope or overcoming a step such as a curb, the engine output may be increased by depressing the accelerator pedal rather than operating the accelerator at the time of normal starting. In addition, some drivers start by adjusting the output by depressing the accelerator pedal a certain amount and then returning the accelerator pedal. Although such accelerator control is not abnormal operation, it may not be possible to determine between abnormal operation and normal operation simply by detecting the rate of increase as described above.

In view of the above points, in the present embodiment, the region from 0 (v) to V1 (v), which is the accelerator pedal depression start region, is set as the uncontrolled region R1, and the region beyond V1 (v) is set as the operating region R2. It is configured to apply the control to prevent sudden start.
The voltage value (V1 in FIG. 3) that defines the upper limit of the uncontrolled region R1 is set in a plurality of stages such as 15%, 20%, and 25% of the voltage V-max shown at full throttle, and the driver is provided. It may be configured so that it can be set according to the characteristics of the vehicle or the vehicle.
In addition, since the vehicle speed is also detected, for example, when the accelerator operation is performed from a state close to a stop (vehicle speed is 0), there is a slight time lag from the accelerator operation until the engine speed starts to increase. be. In consideration of such a tendency, the upper limit of the uncontrolled region R1 may be automatically set high when the accelerator operation is performed from a state close to a stop (vehicle speed is 0).

Explaining the case of the model m1 again, this model m1 represents a case where a sudden increase in voltage is input by a sudden depression operation of the accelerator. The sudden start prevention device 100 is constantly detecting the input voltage, and determines whether or not the rate of increase determined to be abnormal operation is exceeded.
In the present embodiment, an uncontrolled region R1 that does not perform emergency control when the input voltage is less than the set value is provided. Therefore, even if the accelerator is operated so that the rate of increase is determined to be abnormal operation, if the input voltage is in the uncontrolled region R1, emergency control is not performed and the operating region exceeds the uncontrolled region R1. Emergency control is performed when entering R2.
By performing such control, it becomes possible to exclude the case where the accelerator is intentionally depressed from the target of emergency control, and it becomes possible to provide an accelerator signal control device that does not interfere with normal driving operation. ing.

The model m2 represents a case where the voltage rise rate (a2) is slower than that of the model m1 described above. In the case of the model m2 in which the voltage rises at the rise rate a2, it may be difficult to determine whether or not the operation is abnormal depending on how the driver operates.
When the increase rate a4 shown in FIG. 3 is the increase rate of the voltage determined to be the abnormal operation set in advance, the accelerator operation is routinely performed so as to output the increase rate a2 close to the increase rate a4. The driver may be subject to emergency control because the device determines that the driver is operating abnormally even if he / she intends to drive normally.

Assuming such a case, the ascending rate a4 determined to be abnormal driving may be finely adjusted according to the driving method of the individual driver. In other words, by configuring the rate of increase to be judged as abnormal driving to be changed within a small range according to the individual driver, it is easy for the individual driver to drive and emergency control is enabled at the time of abnormal driving to pose a danger. It can be configured to avoid it.
In addition to being able to change the rate of increase in which it is determined that the vehicle is operating abnormally, the uncontrolled area R1 provides an area where emergency control is not performed, so highly safe accelerator signal control that matches the characteristics of the individual driver. It has become possible to provide devices and accelerator signal control methods.

The model m3 is a model showing a case where the accelerator is gently stepped on while adjusting as the vehicle speed increases, and is a case where it is determined that the accelerator is being operated safely. When driving is performed with this model, it is possible to drive without emergency control.

Although each operation mode described in the abnormality is for forward movement, the accelerator signal control device and accelerator signal control method for backward movement will be described.
In addition to misstepping on the accelerator and brake, there are cases where an accident occurs due to misplacement of the forward (D mode) and reverse (R mode) gears. That is, the gear is in reverse (R mode) even though the vehicle intends to move forward, and the vehicle moves backward at once by depressing the accelerator, causing an accident.
One of the causes of this accident is that the engine speed increases according to the amount of depression of the accelerator, and the vehicle speed increases in synchronization with this. That is, in the case of a general vehicle, it is not necessary to increase the vehicle speed at the time of reverse movement above a certain level, but at present, the reverse speed is increased according to the amount of depression of the accelerator.

In view of the above matters, the accelerator signal control device and the accelerator signal control method according to the present embodiment detect when the gear is set to reverse (R mode), and uniformly exceed 5 km / h as an example. There is a speed limit when retreating to control so that there is no such thing. As a result, even if the accelerator operation exceeds the speed limit when reversing, the increase in speed is restricted by disabling the accelerator operation.
As for the reverse speed limit, for example, a mode in which the speed is set arbitrarily or in a plurality of stages may be provided so that the driver can select a setting that is easy for the driver to operate. In addition, it is also possible to apply finer control by applying the detection of the accelerator operation described above and described later.

Hereinafter, other examples of the sudden start prevention device and the sudden start prevention method will be described. This embodiment may be carried out by the embodiment alone, or may be used by adding these elements to the accelerator signal control device and the accelerator signal control method described above, or by appropriately combining them.
FIG. 4 is a flow chart of OAC. The figure shows a processing procedure by a microcomputer built in the main body 110 of the OAC. Hereinafter, this processing procedure will be described with reference to the wiring connection diagram of FIG.

In step S1, the vehicle speed pulse signal constituting the vehicle speed signal output by the vehicle speed sensor 30 is input to the microcomputer via the vehicle speed signal path 151. The microcomputer that has acquired the vehicle speed pulse signal determines whether the vehicle speed pulse signal exceeds the set reference value or is equal to or less than the reference value by the discrimination circuit.
This reference value is defined to be, for example, about the same as the vehicle speed at low speed traveling according to the idling state of the vehicle, and in this embodiment, the reference value is defined to the vehicle speed pulse signal corresponding to 10 km / h. The reason why the reference value is specified in this way is that the sudden start prevention device is intended to avoid sudden start from a stopped state or low speed running of the vehicle. The vehicle speed pulse signal is a signal output in proportion to the vehicle speed, and is the product of the vehicle speed pulse value determined for each vehicle type and the number of rotations of the drive shaft of the speed meter wire, and is the vehicle speed pulse value. The vehicle speed sensor 30 is used for each rotation of the drive shaft of the wire at the speed meter instruction ratio specified by JIS to indicate 60 km / h when the drive shaft of the wire of the speed meter rotates at 637 rpm. The number of vehicle speed pulses generated (for example, 2,4,8,16,32,64 pulse values). For example, if the vehicle has a vehicle speed pulse value of 4 pulses, the vehicle speed pulse signal corresponding to 10 km / h is about 7. It is .07 Hz.

When it is determined in step S1 that the vehicle speed pulse signal exceeds the vehicle speed pulse signal corresponding to the reference value of 10 km / h, the microcomputer issues an output control command corresponding to the accelerator signal to the ECU 20 via the command signal path 130. Output. The fluctuation of the accelerator signal that occurs when the accelerator pedal 11 is depressed from the state where the vehicle speed pulse signal exceeds the above reference value is a normal fluctuation even if it is a sudden fluctuation accompanied by a sudden rise in the level of the accelerator signal. This is determined in step S2, and an output control command corresponding to the accelerator signal is output to the ECU 20, and the ECU 20 controls the engine output based on the output control command. Therefore, under this situation, the vehicle traveling at a speed exceeding the reference value is accelerated following the depression amount of the accelerator pedal 11.

Occurs when the accelerator pedal 11 is depressed from a state where the vehicle speed is 10 km / h or less in step S3 under the condition that the vehicle speed pulse signal is equal to or less than the vehicle speed pulse signal corresponding to the reference value of 10 km / h in step S1. The discriminant circuit determines whether the fluctuation of the accelerator signal is an abnormal fluctuation accompanied by a rapid rise or a normal fluctuation not accompanied by a rapid rise. In this embodiment, the time when the accelerator signal is abnormally changed is defined based on the fluctuation range of the accelerator signal within a certain period of time from the start of depressing the accelerator pedal 11. In other words, the time of abnormal accelerator signal fluctuation is defined from the slope of the accelerator signal fluctuation line represented by the graph showing the relationship between time (horizontal axis) and accelerator signal fluctuation width (vertical axis). There is.

When it is determined in step 3 that the fluctuation of the accelerator signal is a normal fluctuation, an output control command corresponding to the accelerator signal is output to the ECU 20 in step S2, and the ECU 20 controls the engine output based on the output control command. .. Therefore, under this situation, the speed of the traveling vehicle is accelerated following the amount of depression of the accelerator pedal 11.

When it is determined in step 3 that the fluctuation of the accelerator signal is an abnormal fluctuation, the accelerator signal is canceled by the accelerator signal canceling circuit in step S4, and an output control command for suppressing a sudden increase in engine output is given to the ECU 20 in step S5. The engine output is output to the engine, and the ECU 20 controls the engine output based on the output control command. Therefore, the engine output does not suddenly rise and the vehicle does not suddenly start or accelerate.

In this embodiment, by executing steps 1 and 3 to 5 described above, the driver depresses the accelerator pedal against the braking intention while the vehicle is stopped or traveling at a low speed of 10 km / h or less. Even if such an erroneous operation is performed, the situation in which the vehicle is accelerated without being braked against the driver's intention is prevented and the safety of driving is ensured.

Moreover, in this embodiment, the sudden start prevention device is interposed between the two in a state of blocking the signal path connecting the accelerator signal generation unit 10 and the ECU 20, so that the vehicle is stopped or 10 km. When the accelerator signal fluctuates abnormally under the condition of running at low speed below / h, the sudden increase in engine output is always suppressed, while when the accelerator signal fluctuates normally, the accelerator signal does not matter. There is an advantage that the engine output commensurate with the above can always be obtained.

The control of the engine output as described above can be configured to be exerted not only when the vehicle is moving forward but also when the vehicle is moving backward. In this case, the upper limit of the vehicle speed may not be set as described above, and in the case of the control applied at the time of reverse (reverse), the control may be configured so as not to uniformly exceed a constant speed regardless of the vehicle speed. .. With such a configuration, even when a vehicle is put into a parking space, an accident due to an erroneous operation by the driver can be prevented.

FIG. 5 is a flow chart of BOS. The figure shows a processing procedure by a microcomputer built in the main body 110 of the BOS. Hereinafter, this processing procedure will be described with reference to the wiring connection diagram of FIG. 2 and the block diagram illustrating the braking system of FIG. 7.

The BOS is a processing system by a microcomputer when the accelerator pedal 11 and the brake pedal are simultaneously depressed under the condition that the vehicle is stopped or traveling at a low speed of 10 km / h or less.

The vehicle speed pulse signal is input to the microcomputer of the main body 110 via the vehicle speed pulse signal path 151, and the brake signal is input via the brake signal path 161. Then, in step S10, the determination circuit determines whether or not the accelerator pedal 11 and the brake pedal are depressed at the same time.

If it is determined in step S10 that only the accelerator pedal 11 is depressed under the condition that the vehicle speed pulse signal is a vehicle speed pulse signal corresponding to the reference value of 10 km / h or less in step S1, FIG. Step S3 and subsequent steps in the OAC processing procedure described are executed. If it is determined in step S10 that only the brake pedal is depressed, the braking mechanism 70 operates to brake the vehicle.
On the other hand, when it is determined in step S10 that the accelerator pedal 11 and the brake pedal are depressed at the same time, the accelerator signal is canceled by the accelerator signal canceling circuit of the microcomputer in step S20, and the accelerator pedal is referred to the ECU 20. A pseudo accelerator signal is output when the vehicle is not depressed, and the braking mechanism 70 operates to brake the vehicle.

According to this embodiment, when the accelerator pedal and the brake pedal are depressed at the same time for some reason, the operation of depressing the brake pedal is prioritized as described above, so that driving safety is ensured.

Next, as shown in FIG. 2, a push switch 80 is connected to the main body 110 of the sudden start prevention device 110 of this embodiment. The push switch 80 constitutes an operation level setting means together with a sensitivity setting circuit of a microcomputer built in the main body 110. This operation level setting means has a function of defining a plurality of the above-mentioned abnormal accelerator signal fluctuations with different fluctuation widths and switching between the plurality of defined abnormal accelerator signal fluctuations. Then, when the push switch 80 is repeatedly pressed down, the operation level of the OAC is sequentially switched to three stages (level 1, level 2, level 3) by the action of the sensitivity setting circuit. This operation level is related to the magnitude of the fluctuation range of the accelerator signal within a certain time from the start of depressing the accelerator pedal 11, and the higher the operation level, the within a certain time from the start of depressing the accelerator pedal 11. Even if the fluctuation range of the accelerator signal is small, it is determined to be an abnormal fluctuation in step S3.

By the way, the correspondence between the value of the vehicle speed pulse output by the vehicle speed sensor 30 and the vehicle speed differs depending on the vehicle type. Therefore, in order to accurately exert the above-mentioned action by OAC and BOS, the vehicle speed pulse value suitable for the vehicle is set, and the correspondence relationship between the vehicle speed pulse signal output by the vehicle speed sensor 30 and the actual vehicle speed is accurate. Need to be associated with.

Therefore, in this embodiment, the main body 110 shown in FIG. 2 is provided with a dial as the vehicle speed pulse value setting means 90 (hereinafter, the dial is also designated by the reference numeral 90). Further, the microcomputer built in the main body 110 is equipped with a vehicle speed vehicle speed pulse value setting circuit in which the vehicle speed pulse value fluctuates by operating the dial 90.

In this embodiment, among the numbers 0 to 9 assigned to the dial 90, vehicle speed pulse values 2, 4, 8, 16, 32, and 64 are assigned to the numbers 0 to 5. Therefore, the vehicle speed pulse value suitable for the vehicle is set only by selecting the number of the dial 90 according to the vehicle speed pulse value of the vehicle to which the sudden start prevention device 100 is attached.

However, since there are some vehicles whose vehicle speed pulse value is unknown, in this embodiment, the pulse detection mode setting circuit is mounted on the microcomputer built in the main body 110, while the number 9 of the dial 90 is set to the pulse detection mode. Allocation, the push switch 80 is provided with a detection pulse setting function, and the number 8 of the dial 90 is assigned as a number for setting the detection pulse. In this way, it is possible to automatically detect the vehicle speed pulse value for a vehicle whose vehicle speed pulse value is unknown. When automatically detecting the vehicle speed pulse value, after starting the engine of the vehicle, the dial 90 is set to the number 9 to switch to the pulse detection mode, and the vehicle is driven at a constant speed of, for example, 20 km / h for several seconds or more. By pushing down the push switch 80 in this state, the vehicle speed pulse signal is acquired and the vehicle speed pulse value is automatically detected from the value. The automatically detected vehicle speed pulse value is assigned to the number 8 of the dial 90. For example, if the vehicle speed pulse signal during constant speed traveling at 20 km / h is a value near 226.48 Hz, the vehicle speed pulse value of the vehicle is 64 pulses.

In the embodiment described above, a long or short signal sound is generated for each operation of the push switch 80 when the accelerator opening is set, or a signal sound is generated for each operation of the push switch 80 when the operation of the OAC is confirmed. Alternatively, it is possible to generate a signal sound for each operation of the push switch 80 when the vehicle speed pulse is set. It is also possible to make a light emitting element emit light instead of the signal sound.

Further, the sudden start prevention device and the sudden start prevention method described above can be configured as the following sudden start prevention devices. That is,
A brake pedal for braking, an accelerator pedal, an accelerator signal generation unit that outputs an accelerator signal at a level commensurate with the amount of depression of the accelerator pedal, and an engine that controls engine output based on the accelerator signal output by this accelerator signal generation unit. A sudden start prevention device applied to a vehicle equipped with a control unit and a vehicle speed sensor that outputs a vehicle speed pulse signal.
The vehicle speed pulse signal output by the vehicle speed sensor is equal to or less than a certain reference value while being interposed between the two in a state of blocking the signal path connecting the accelerator signal generation unit and the engine control unit. On condition that the accelerator signal level suddenly rises, when the accelerator signal abnormally fluctuates, the accelerator signal is canceled and an output suppression command for suppressing the sudden rise in engine output is output to the engine control unit. The sudden start prevention device comprising an over-accelerator canceller means for outputting an output control command corresponding to the accelerator signal to the engine control unit when the accelerator signal normally fluctuates without a sudden increase in the level of the accelerator signal.

In addition, the following configurations can be added to the above invention.
That is, a sudden start prevention device that defines the time when the accelerator signal is abnormally changed based on the fluctuation range of the accelerator signal within a certain time from the start of depressing the accelerator pedal.

In addition, the following configurations can be added to the above invention. That is,
A sudden start prevention device further comprising an operation level control means for defining a plurality of abnormal accelerator signal fluctuations with different fluctuation ranges and switching between the plurality of specified abnormal accelerator signal fluctuations.

In addition, the following configurations can be added to the above invention. That is,
The vehicle speed pulse value setting means for setting the vehicle speed pulse value to a value suitable for the mounted vehicle is further provided, and the vehicle speed pulse value setting means obtains and sets the vehicle speed pulse value from the vehicle speed pulse signal during constant speed driving to prevent sudden start. Device.

In addition, the following configurations can be added to the above invention. That is,
A sudden start prevention device further provided with a brake override means that prioritizes the depression operation of the brake pedal when the accelerator pedal and the brake pedal are depressed at the same time.

These sudden start prevention devices can cancel the accelerator signal at that time and suppress the sudden rise in engine output at the time of abnormal fluctuation (abnormal operation), and can obtain the engine output corresponding to the accelerator signal at the time of normal fluctuation. be. Further, in a situation where the accelerator pedal and the brake pedal are depressed at the same time for some reason, it is possible to prioritize the depression operation of the brake pedal to ensure safety.

10 Accelerator signal generation unit 11 Accelerator pedal 20 ECU (engine control unit)
30 Vehicle speed sensor 100 Sudden start prevention device

Claims (8)

In a vehicle that adjusts the engine output based on the accelerator opening information that is output according to the amount of depression of the accelerator.
An accelerator signal control means for executing emergency control for limiting or invalidating the opening information when the opening information exceeds the set amount of increase per unit time is provided.
A reference opening of 1 or 2 or more is set in the accelerator opening information, and when the reference opening is exceeded, the emergency control according to the reference opening can be executed.
It is configured so that the amount of increase for determining that the emergency control is executed can be changed .
An accelerator signal control method characterized in that when the accelerator operation is performed from a stopped state, the reference opening degree is automatically set high. The accelerator signal control according to claim 1, wherein the emergency control is executed only when the vehicle speed or the vehicle speed signal output in proportion to the vehicle speed is equal to or less than a set reference value. Method. 1. The accelerator signal control method according to any one of claims 2. It is an accelerator signal control device provided in a vehicle that adjusts the engine output based on the accelerator opening information output according to the amount of depression of the accelerator.
When the opening information exceeds the set amount of increase per unit time, the emergency control for limiting or invalidating the opening information is configured to be executed.
A reference opening of 1 or 2 or more is set in the accelerator opening information, and when the reference opening is exceeded, the emergency control according to the reference opening can be executed.
It is configured so that the amount of increase for determining that the emergency control is executed can be changed .
An accelerator signal control device characterized in that when the accelerator operation is performed from a stopped state, the reference opening degree is automatically set high. The accelerator signal control according to claim 4, wherein the emergency control is executed only when the vehicle speed or the vehicle speed signal output in proportion to the vehicle speed is equal to or less than a set reference value. Device. 4. The accelerator signal control device according to any one of claims 5. In a vehicle that adjusts the engine output based on the accelerator opening information that is output according to the amount of depression of the accelerator.
When moving the vehicle backward, the upper limit of speed or engine speed is set, and the opening information is restricted or invalidated so as not to exceed the upper limit.
An accelerator signal control means for executing emergency control for limiting or invalidating the opening information when the opening information exceeds the set amount of increase per unit time is provided.
It is configured so that the amount of increase for determining that the emergency control is executed can be changed .
An accelerator signal control method characterized in that when the accelerator operation is performed from a stopped state, the reference opening degree is automatically set high. In a vehicle that adjusts the engine output based on the accelerator opening information that is output according to the amount of depression of the accelerator.
When moving the vehicle backward, the upper limit of speed or engine speed is set, and the opening information is restricted or invalidated so as not to exceed the upper limit.
When the opening information exceeds the set amount of increase per unit time, the emergency control for limiting or invalidating the opening information is configured to be executed.
It is configured so that the amount of increase for determining that the emergency control is executed can be changed .
An accelerator signal control device characterized in that when the accelerator operation is performed from a stopped state, the reference opening degree is automatically set high.

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