JP2021187225A - Sudden start prevention device - Google Patents

Abstract

To accurately prevent sudden start due to stepping mistake of an accelerator pedal in accordance with a type of a vehicle while suppressing a user's burden due to increase in mounting man-hours.SOLUTION: A sudden start prevention device comprises: an accelerator voltage detection unit 101 which detects the voltage of an accelerator signal output from an accelerator pedal unit 20; a storage determination unit 103 which automatically determines the voltage detected by the accelerator voltage detection unit 101 as reference voltage to be stored when it is specified that a vehicle in an accelerator non-stepped state; a storage unit 104 which stores the reference voltage being the determined voltage; a suppression determination unit 106 which determines whether or not to suppress the acceleration of the own vehicle according to the stepping-amount of the accelerator pedal by comparing the reference voltage stored in the storage unit 104 with the voltage detected by the accelerator voltage detection unit 101; and an accelerator voltage output unit 107 which suppresses the acceleration of the own vehicle according to the stepping-amount of the accelerator pedal when the suppression determination unit 106 determines that the acceleration of the own vehicle is suppressed.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a sudden start prevention device.

In order to prevent sudden acceleration due to a mistake in pressing the accelerator pedal and brake pedal of the vehicle, the increase in engine output is limited when a change defined as an abnormality is detected in the accelerator signal according to the amount of depression of the accelerator pedal. Sudden start prevention devices are known. However, since the voltage range of the accelerator signal differs depending on the vehicle type of the vehicle, it is necessary to store the voltage of the accelerator signal during normal driving for each vehicle type. On the other hand, in Patent Document 1, the accelerator is changed to a learning mode different from the normal mode, and the voltage value of the accelerator signal when the accelerator pedal is fully depressed in the learning mode is stored to store the accelerator for each vehicle type. A technique for learning the voltage of a signal is disclosed. In the technique of Patent Document 1, when the learning switch is pressed and held for 3 seconds, for example, the learning mode is entered.

Japanese Patent No. 5231156

However, when the sudden start prevention device is retrofitted to an already-sold vehicle, the increase in man-hours for mounting is an important problem that directly leads to the burden on the user. On the other hand, as in the technique disclosed in Patent Document 1, it is possible to shift to the learning mode by operating the learning switch by the user and have the user operate a predetermined accelerator pedal in the learning mode, which increases the man-hours for mounting. Leads to. In addition, since it is unlikely that the user will transition to the sequential learning mode when using the vehicle, it is difficult to cope with the voltage change of the accelerator signal due to the influence of aging.

One purpose of this disclosure is to provide a sudden start prevention device that can prevent sudden start due to an incorrect accelerator pedal depression, while suppressing the burden on the user due to the increase in man-hours for mounting, and more accurately according to the vehicle type of the vehicle. To provide.

The above object is achieved by a combination of the features described in the independent claims, and the sub-claims provide for further advantageous embodiments of the disclosure. The reference numerals in parentheses described in the claims indicate, as one embodiment, the correspondence with the specific means described in the embodiments described later, and do not limit the technical scope of the present disclosure. ..

In order to achieve the above object, the sudden start prevention device of the present disclosure is used in a vehicle, and an accelerator voltage that detects a voltage output from the accelerator pedal unit (20) of the vehicle according to the amount of depression of the accelerator pedal of the vehicle. Based on the detection unit (101, 101a) and the identification that the accelerator pedal is in a predetermined constant state, the voltage to be stored is automatically determined from the voltages detected by the accelerator voltage detection unit. The storage determination unit (103, 103a), the storage unit (104) that stores the reference voltage that is the voltage determined by the storage determination unit, and the acceleration of the vehicle according to the amount of depression of the accelerator pedal are suppressed. When the suppression determination unit (106) that determines whether or not the vehicle is suppressed and the suppression determination unit determines that the acceleration of the vehicle according to the amount of depression of the accelerator pedal is suppressed, the reference voltage stored in the storage unit is used. The vehicle is provided with a suppression processing unit (107) that suppresses acceleration of the vehicle according to the amount of depression of the accelerator pedal.

According to this, when the suppression determination unit determines that the acceleration of the vehicle is suppressed, the acceleration of the vehicle according to the amount of depression of the accelerator pedal is suppressed. Therefore, it is possible to prevent a sudden start due to an erroneous depression of the accelerator pedal. In addition, as the reference voltage, the voltage automatically determined as the voltage to be memorized from the voltages detected by the accelerator voltage detection unit based on the identification that the accelerator pedal is in a predetermined constant state. Use. Therefore, it is not necessary to force the user to perform an operation different from the driving operation of the vehicle in order to store the reference voltage. Further, since the reference voltage is a voltage output from the accelerator pedal unit of the vehicle according to the amount of depression of the accelerator pedal of the vehicle, it is possible to easily obtain the reference voltage according to the vehicle type. The suppression processing unit uses this reference voltage to suppress the acceleration of the vehicle according to the amount of depression of the accelerator pedal, so that sudden start due to an incorrect depression of the accelerator pedal can be prevented more accurately according to the vehicle type of the vehicle. Will be possible. As a result, it is possible to prevent sudden start due to an error in pressing the accelerator pedal more accurately according to the vehicle type of the vehicle while suppressing the burden on the user due to the increase in man-hours for mounting.

It is a figure which shows an example of the schematic structure of the sudden start prevention system 1 and the adjustment ECU 10. It is a flowchart which shows an example of the flow of the voltage storage-related processing in adjustment ECU 10. It is a figure which shows an example of the schematic structure of the sudden start prevention system 1a and the adjustment ECU 10a.

A plurality of embodiments for disclosure will be described with reference to the drawings. For convenience of explanation, the parts having the same functions as the parts shown in the drawings used in the previous description may be designated by the same reference numerals and the description thereof may be omitted among the plurality of embodiments. be. For the parts with the same reference numerals, the description in other embodiments can be referred to.

(Embodiment 1)
<Outline configuration of sudden start prevention system 1>
Hereinafter, this embodiment will be described with reference to the drawings. First, the sudden start prevention system 1 will be described with reference to FIG. As shown in FIG. 1, the sudden start prevention system 1 includes an adjustment ECU 10, an accelerator pedal unit 20, a brake pedal unit 30, an accelerator depression sensor 40, and a power unit ECU 50. The sudden start prevention system 1 is used in a vehicle such as an automobile. Hereinafter, the vehicle using the sudden start prevention system 1 is referred to as a own vehicle.

The accelerator pedal unit 20 includes an accelerator pedal. The accelerator pedal unit 20 is connected to the adjustment ECU 10. The accelerator pedal unit 20 outputs an accelerator signal having a voltage corresponding to the amount of depression of the accelerator pedal to the adjusting ECU 10. The brake pedal unit 30 includes a brake pedal. The brake pedal unit 30 is connected to the adjustment ECU 10. The brake pedal unit 30 is also connected to a brake ECU that performs processing related to braking of the own vehicle. The brake pedal unit 30 outputs a brake signal having a voltage corresponding to the amount of depression of the brake pedal to the adjusting ECU 10.

The accelerator depression sensor 40 detects depression of the accelerator pedal. As the accelerator depression sensor 40, a pressure sensor provided on the surface of the accelerator pedal, a position sensor of a movable portion of the accelerator pedal, or the like may be used. The power unit ECU 50 controls a traveling drive source of the own vehicle such as an internal combustion engine and a motor generator. The power unit ECU 50 operates the traveling drive source according to the voltage of the accelerator signal output from the adjustment ECU 10 described later. More specifically, the output of the traveling drive source is increased as the voltage of the accelerator signal increases, and the vehicle is accelerated as the voltage of the own accelerator signal increases.

The adjusting ECU 10 includes, for example, a processor, a memory, an I / O, and a bus connecting these, and executes a control program stored in the memory to execute a process related to preventing a sudden start of the own vehicle. The memory referred to here is a non-transitory tangible storage medium that stores programs and data that can be read by a computer non-transitoryly. Further, the non-transitional substantive storage medium is realized by a semiconductor memory, a magnetic disk, or the like. The adjustment ECU 10 corresponds to a sudden start prevention device.

The adjusting ECU 10 may be retrofitted to, for example, a sold vehicle, or may be assembled at the time of manufacture. When the adjusting ECU 10 is retrofitted, the adjusting ECU 10 may be configured to be connected between the accelerator pedal unit 20 and the power unit ECU 50. In this case, the accelerator pedal unit 20 and the power unit ECU 50 may be connected until the adjustment ECU 10 is connected, and the accelerator signal output from the accelerator pedal unit 20 may be input to the power unit ECU 50. Details of the adjustment ECU 10 will be described below.

<Rough configuration of adjustment ECU 10>
Subsequently, an example of a schematic configuration of the adjustment ECU 10 will be described with reference to FIG. 1. As shown in FIG. 1, the adjustment ECU 10 functions as an accelerator voltage detection unit 101, a brake voltage detection unit 102, a storage determination unit 103, a storage unit 104, a storage update unit 105, a suppression determination unit 106, and an accelerator voltage output unit 107. Prepare as a block. In addition, a part or all of the functions executed by the adjustment ECU 10 may be configured in terms of hardware by one or a plurality of ICs or the like. Further, a part or all of the functional blocks included in the adjustment ECU 10 may be realized by a combination of software execution by a processor and hardware members.

The accelerator voltage detection unit 101 detects the voltage output from the accelerator pedal unit 20 of the own vehicle according to the amount of depression of the accelerator pedal of the own vehicle. That is, the voltage of the accelerator signal is detected. The brake voltage detection unit 102 detects the voltage output from the brake pedal unit 30 of the own vehicle according to the amount of depression of the brake pedal of the own vehicle.

The storage determination unit 103 automatically determines the voltage to be stored from the voltages detected by the accelerator voltage detection unit 101 based on the identification that the accelerator pedal is in a predetermined constant state. The storage determination unit 103 may determine the voltage detected by the accelerator voltage detection unit 101 when it is specified that the accelerator pedal is not depressed and the accelerator is not depressed, as the voltage to be stored.

The memory determination unit 103 may specify that the accelerator is not depressed when the voltage output from the brake pedal unit 30 is detected by the brake voltage detection unit 102. That is, when the voltage output from the brake pedal unit 30 is detected by the brake voltage detection unit 102, the voltage detected by the accelerator voltage detection unit 101 may be determined as the voltage to be stored. This is because when the driver of the own vehicle is depressing the brake pedal, it is normal that the accelerator pedal is not depressed, and there is a high possibility that the accelerator is not depressed.

The memory determination unit 103 may specify that the accelerator is not depressed within the threshold time from the start of the traveling drive source of the own vehicle. That is, the voltage detected by the accelerator voltage detection unit 101 within the threshold time from the start of the traveling drive source of the own vehicle may be determined as the voltage to be stored. This is because the driver depresses the brake pedal when starting the driving drive source of the own vehicle, and it takes time to switch the pedal to be depressed to the accelerator pedal. This is because there is a high possibility that the accelerator has not been stepped on during the time. This makes it possible to suppress the storage of an erroneous voltage as the reference voltage by limiting the timing at which the reference voltage is stored. The threshold time referred to here is a time that can be arbitrarily set, and is set to a time equal to or less than the time estimated to be at least required from the start of the driving drive source of the own vehicle to the time when the driver depresses the accelerator pedal. good.

It should be noted that the start of the traveling drive source of the own vehicle may be determined, for example, from the fact that the ignition (hereinafter, IG) power supply is turned on. In addition, it may be judged from the fact that the switch for starting the internal combustion engine or the motor generator of the own vehicle (hereinafter referred to as the power switch) is turned on.

When the memory determination unit 103 does not detect the depression of the accelerator pedal by the accelerator depression sensor 40, it may be specified that the accelerator pedal is not depressed. That is, the voltage detected by the accelerator voltage detection unit 101 when the accelerator pedal depression is not detected by the accelerator depression sensor 40 may be determined as the voltage to be stored. This is because if the accelerator pedal depression is not detected, it can be considered that the accelerator pedal has not been depressed. According to the above configuration, it is possible to identify the accelerator undepressed state from the result of directly detecting that the accelerator pedal is not depressed by the sensor. Therefore, it is possible to prevent erroneous identification of the accelerator unstepped state.

When the time fluctuation of the voltage detected by the accelerator voltage detection unit 101 is small, the storage determination unit 103 may specify that the accelerator is not in the stepped state. That is, when the amount of change in voltage per unit time detected by the accelerator voltage detection unit 101 is equal to or less than a specified value, the voltage detected by the accelerator voltage detection unit 101 may be determined as the voltage to be stored. This is because when the accelerator pedal is depressed, the amount of depression changes with time, so that the voltage fluctuates greatly, whereas when the accelerator pedal is not depressed, the voltage stabilizes at a low value. The specified value referred to here is a value for classifying whether or not it is the amount of change in voltage when it stabilizes at a low value when the accelerator pedal is not depressed, and can be arbitrarily set.

When the memory determination unit 103 detects the voltage by the brake voltage detection unit 102, within the threshold time from the start of the start of the traveling drive source of the own vehicle, and when the accelerator pedal depression sensor 40 does not detect the depression of the accelerator pedal. When at least one or more of the four conditions of the case where the time fluctuation of the voltage detected by the accelerator voltage detection unit 101 is small is satisfied, it is preferable to specify that the accelerator is in an unexplored state. According to this, even if one of the four conditions erroneously identifies the accelerator as unstepped, it is possible to avoid erroneously specifying the accelerator. Therefore, it is possible to prevent the storage unit 104, which will be described later, from performing erroneous storage.

The storage unit 104 stores a voltage (hereinafter referred to as a reference voltage) determined by the storage determination unit 103 to be stored. That is, the storage unit 104 stores the voltage detected by the accelerator voltage detection unit 101 as the reference voltage when the storage determination unit 103 determines that the accelerator has not been stepped on. The storage unit 104 may be configured to use a non-volatile memory.

The storage update unit 105 updates the reference voltage stored in the storage unit 104. When the accelerator voltage detection unit 101 detects a voltage lower than the reference voltage stored in the storage unit 104, the storage update unit 105 updates the voltage lower than the reference voltage as a new reference voltage. More specifically, the reference voltage stored in the storage unit 104 may be erased and a new reference voltage may be stored for updating. The voltage to be compared with the reference voltage stored in the storage unit 104 may be limited to the voltage determined to be stored by the storage determination unit 103.

By performing the above-mentioned update in the storage update unit 105, it becomes possible to sequentially update the reference value to the minimum value detected by the accelerator voltage detection unit 101. Therefore, even if an erroneous reference voltage is stored in the storage unit 104 as the voltage of the accelerator signal in the undepressed state of the accelerator, this erroneous reference voltage can be corrected. In addition, even if the voltage drop of the accelerator signal occurs due to battery voltage fluctuation or aging, it is possible to sequentially update to the reference voltage according to this voltage drop.

The suppression determination unit 106 determines whether or not to suppress the acceleration of the own vehicle according to the amount of depression of the accelerator pedal. As an example, whether or not to suppress the acceleration of the own vehicle according to the amount of depression of the accelerator pedal by comparing the reference voltage stored in the storage unit 104 with the voltage detected by the accelerator voltage detection unit 101. Should be determined. As a specific example, when the voltage detected by the accelerator voltage detection unit 101 is larger than the specified value of the reference voltage stored in the storage unit 104, it is determined that the acceleration of the own vehicle according to the depression amount of the accelerator pedal is suppressed. do it. On the other hand, if the voltage detected by the accelerator voltage detection unit 101 does not satisfy a relationship larger than the specified value of the reference voltage stored in the storage unit 104, the acceleration of the own vehicle according to the amount of depression of the accelerator pedal is suppressed. Then it is not necessary to judge. The specified value referred to here is a value for distinguishing whether or not the value is appropriate at the time of sudden start, and is a value that can be arbitrarily set.

According to this, it is not necessary to force the user to perform an operation different from the driving operation of the vehicle in order to store the reference voltage. Further, since the reference voltage is a voltage output from the accelerator pedal unit of the vehicle according to the amount of depression of the accelerator pedal of the vehicle, it is possible to easily obtain the reference voltage according to the vehicle type. Therefore, it is possible to more accurately determine whether or not to suppress the acceleration of the own vehicle according to the amount of depression of the accelerator pedal while suppressing the burden on the user due to the increase in the mounting man-hours.

When the accelerator voltage output unit 107 does not determine that the suppression determination unit 106 suppresses the acceleration of the own vehicle according to the amount of depression of the accelerator pedal, the power unit uses the voltage of the accelerator signal detected by the accelerator voltage detection unit 101. Output to ECU 50. In this case, the power unit ECU 50 increases the output of the traveling drive source according to the amount of depression of the accelerator pedal to accelerate the own vehicle.

On the other hand, when the suppression determination unit 106 determines that the suppression determination unit 106 suppresses the acceleration of the own vehicle according to the depression amount of the accelerator pedal, the accelerator voltage output unit 107 suppresses the acceleration of the vehicle according to the depression amount of the accelerator pedal. Therefore, the accelerator voltage output unit 107 corresponds to the suppression processing unit. As an example, when the accelerator voltage output unit 107 determines that the suppression determination unit 106 suppresses the acceleration of the own vehicle according to the amount of depression of the accelerator pedal, the power unit uses the voltage of the accelerator signal detected by the accelerator voltage detection unit 101. Instead of outputting to the ECU 50, the voltage of the accelerator signal in the undepressed state of the accelerator may be output to the power unit ECU 50 as a pseudo accelerator signal voltage. For example, the accelerator voltage output unit 107 may output the reference voltage stored in the storage unit 104 to the power unit ECU 50. In this case, the power unit ECU 50 does not accelerate the own vehicle according to the amount of depression of the accelerator pedal. Therefore, it is possible to prevent a sudden start due to an erroneous depression of the accelerator pedal.

<Voltage memory related processing in the adjustment ECU 10>
Next, an example of the flow of the process related to the storage of the reference voltage in the adjustment ECU 10 (hereinafter referred to as the voltage storage-related process) will be described with reference to the flowchart of FIG. The flowchart of FIG. 2 may be configured to start when the IG power is turned on and the power of the adjusting ECU 10 is turned on.

First, in step S1, when the memory determination unit 103 identifies that the accelerator has not been stepped on (YES in S1), the process proceeds to step S2. On the other hand, if the memory determination unit 103 has not specified that the accelerator has not been stepped on (NO in S1), the process proceeds to step S5. In step S2, the accelerator voltage detection unit 101 detects the voltage of the accelerator signal output from the accelerator pedal unit 20 of the own vehicle according to the amount of depression of the accelerator pedal of the own vehicle.

In step S3, if the reference voltage has already been stored in the storage unit 104 (YES in S3), the process proceeds to step S5. On the other hand, when the reference voltage is not stored in the storage unit 104 (NO in S3), the process proceeds to step S4. In step S4, the storage determination unit 103 stores the voltage of the accelerator signal detected in S2 in the storage unit 104, and moves to step S5.

In step S5, the accelerator voltage detection unit 101 detects the voltage of the accelerator signal output from the accelerator pedal unit 20 of the own vehicle according to the amount of depression of the accelerator pedal of the own vehicle. In step S6, the storage update unit 105 compares the voltage of the accelerator signal detected in S5 with the reference voltage stored in the storage unit 104. In step S7, if the voltage of the accelerator signal detected in S5 is lower than the reference voltage stored in the storage unit 104 (YES in S7), the process proceeds to step S8. On the other hand, when the voltage of the accelerator signal detected in S5 is equal to or higher than the reference voltage stored in the storage unit 104 (NO in S7), the process proceeds to step S9.

In step S8, the storage update unit 105 updates the reference voltage stored in the storage unit 104 to the voltage of the accelerator signal detected in S5, and proceeds to step S10. On the other hand, in step S9, the storage update unit 105 maintains the reference voltage stored in the storage unit 104 without updating, and proceeds to step S10.

In step S10, when it is the end timing of the voltage storage-related processing (YES in S10), the voltage storage-related processing is terminated. Examples of the end timing of voltage storage-related processing include when the IG power supply is turned off and when the power switch is turned off. On the other hand, if it is not the end timing of the voltage storage-related processing (NO in S10), the process returns to S1 and the processing is repeated. The flowchart of FIG. 2 may be configured to end the voltage storage-related processing in S10.

<Summary of Embodiment 1>
According to the configuration of the first embodiment, as described above, it is possible to prevent a sudden start due to an erroneous depression of the accelerator pedal. Further, regarding the reference voltage, when it is specified that the accelerator pedal is not depressed and the accelerator is not depressed, the voltage detected by the accelerator voltage detection unit 101 is automatically determined as the voltage to be stored (that is, the reference voltage). It is stored in the storage unit 104. Therefore, it is not necessary to force the user to perform an operation different from the driving operation of the vehicle in order to store the reference voltage. Further, since the reference voltage is the voltage of the accelerator signal output from the accelerator pedal unit 20 of the vehicle according to the amount of depression of the accelerator pedal of the vehicle, it is possible to easily obtain the reference voltage according to the vehicle type. When the suppression determination unit 106 determines that the acceleration of the own vehicle is suppressed according to the amount of depression of the accelerator pedal, the accelerator voltage output unit 107 outputs the reference voltage to the power unit ECU 50 as a pseudo accelerator signal voltage. Become. Since this reference voltage is the voltage detected by the accelerator voltage detection unit 101 when it is specified that the accelerator is not depressed, acceleration of the vehicle according to the amount of depression of the accelerator pedal is accurately prevented according to the vehicle type of the vehicle. It will be possible to do. As a result, it is possible to prevent sudden start due to an error in pressing the accelerator pedal more accurately according to the vehicle type of the vehicle while suppressing the burden on the user due to the increase in man-hours for mounting.

(Embodiment 2)
In the above-described first embodiment, the case where the output from the accelerator pedal unit 20 exists in only one system has been described as an example, but the description is not limited to this. For example, a configuration in which two outputs from the accelerator pedal unit 20 exist (hereinafter, the second embodiment) may be used. Hereinafter, an example of the second embodiment will be described with reference to the drawings.

As shown in FIG. 3, the sudden start prevention system 1a of the second embodiment includes an adjustment ECU 10a, an accelerator pedal unit 20, a brake pedal unit 30, an accelerator depression sensor 40, and a power unit ECU 50. The sudden start prevention system 1a is the same as the sudden start prevention system 1 of the first embodiment, except that the adjustment ECU 10a is included instead of the adjustment ECU 10 and there are two systems for outputting voltage from the accelerator pedal unit 20. The same is true.

The accelerator pedal unit 20 has two systems for outputting the voltage of the accelerator signal. Specifically, the configuration may be such that the accelerator pedal unit 20 is provided with two signal lines for outputting the voltage of the accelerator signal to the adjustment ECU 10.

Subsequently, an example of a schematic configuration of the adjustment ECU 10a will be described with reference to FIG. As shown in FIG. 3, the adjustment ECU 10a functions as an accelerator voltage detection unit 101a, a brake voltage detection unit 102, a storage determination unit 103a, a storage unit 104, a storage update unit 105a, a suppression determination unit 106, and an accelerator voltage output unit 107. Prepare as a block. The adjustment ECU 10a is the first embodiment, except that the accelerator voltage detection unit 101, the memory determination unit 103, and the memory update unit 105 are provided with the accelerator voltage detection unit 101a, the memory determination unit 103a, and the memory update unit 105a. It is the same as the adjustment ECU 10.

The accelerator voltage detection unit 101a is the same as the accelerator voltage detection unit 101 of the first embodiment, except that the voltages output from the two systems of the accelerator pedal unit 20 are individually detected. Specifically, the accelerator voltage detection unit 101a may individually detect the voltage of the accelerator signal input from each of the two signal lines connecting the accelerator pedal unit 20 and the adjustment ECU 10. It is assumed that the voltage of the accelerator signal output from the accelerator pedal unit 20 through these two signal lines is the voltage output for the same operation to the accelerator pedal.

The storage determination unit 103a is different from the storage determination unit 103 of the first embodiment except that the voltage to be stored is determined only when the difference between the voltages of the two systems detected by the accelerator voltage detection unit 101a is a constant value. The same is true. For example, the storage determination unit 103a may be configured not to perform processing when the difference between the voltages of the two systems detected by the accelerator voltage detection unit 101a is not a constant value. The constant value referred to here is, for example, a value determined for each vehicle type, and for example, the difference between the voltages of the two systems measured at the time of manufacture for each vehicle type may be used. Further, the fact that the difference between the voltages of the two systems is a constant value includes an error range, and includes the case where the difference between the voltages of the two systems is a substantially constant value.

The storage update unit 105a is the same as the storage update unit 105 of the first embodiment except that the reference voltage is updated only when the difference between the voltages of the two systems detected by the accelerator voltage detection unit 101a is a constant value. Is. For example, the storage update unit 105a may be configured not to perform processing when the difference between the voltages of the two systems detected by the accelerator voltage detection unit 101a is not a constant value. The constant value referred to here may be the same as the above-mentioned constant value. Further, the fact that the difference between the voltages of the two systems is a constant value includes an error range, and includes the case where the difference between the voltages of the two systems is a substantially constant value.

According to the above configuration, when one of the two signal lines is disconnected (hereinafter, when one is disconnected), the difference between the voltages of the two systems is not a constant value, so that the wrong reference voltage is obtained when one of the signals is disconnected. It becomes possible to prevent the memory of. In addition, it is possible to improve the determination accuracy of the reference voltage when the accelerator is not depressed for a vehicle type in which the voltage between the two systems fluctuates when the accelerator pedal is depressed. In addition, in an emergency, by using the voltage relationship of the two systems and opening at least one system (that is, open), the vehicle accelerates while outputting diagnostic information etc. to the vehicle side. Can be suppressed. In this case, the storage unit 104 becomes unnecessary.

(Embodiment 3)
In the above-described embodiment, as a condition for specifying that the accelerator is not depressed, the voltage is detected by the brake voltage detection unit 102, within the threshold time from the start of the traveling drive source of the own vehicle, and the accelerator depression sensor 40. Although the configuration is shown in which the four conditions of the case where the depression of the accelerator pedal is not detected and the case where the time fluctuation of the voltage detected by the accelerator voltage detection unit 101 is small can be used, the present invention is not necessarily limited to this. For example, a configuration may be used in which only a part of the four conditions can be used.

If the configuration is such that the case where the voltage is detected by the brake voltage detection unit 102 is not used as a condition for specifying that the accelerator is not depressed, it is not necessary to connect the brake pedal unit 30 to the adjustment ECUs 10 and 10a. .. Further, it is not necessary to equip the adjusting ECUs 10 and 10a with the brake voltage detecting unit 102.

If the accelerator pedal depression sensor 40 does not detect the accelerator pedal depression as a condition for specifying that the accelerator pedal is not depressed, the accelerator depression sensor 40 should be connected to the adjustment ECUs 10 and 10a. Is unnecessary.

(Embodiment 4)
In the above-described embodiment, the configuration in which the accelerator unstepped state is used as a predetermined constant state is shown, but the present invention is not necessarily limited to this. As a predetermined constant state, a state other than the accelerator unstepped state may be used as long as it can be specified from the detection result of the sensor or the like without the driver's operation other than the driving operation. For example, a solid stepped state in which the accelerator pedal is depressed to a position where it can be depressed may be used. When this configuration is adopted, the unexplored voltage is estimated based on the voltage detected by the accelerator voltage detection unit 101 when it is specified as a predetermined constant state, and the estimated voltage is used as a pseudo accelerator signal. It may be configured to output as a voltage.

(Embodiment 5)
In the above-described embodiment, the suppression determination unit 106 compares the reference voltage stored in the storage unit 104 with the voltage detected by the accelerator voltage detection unit 101, so that the own vehicle corresponds to the amount of depression of the accelerator pedal. Although the configuration for determining whether or not to suppress the acceleration of is shown, the present invention is not necessarily limited to this.

For example, the suppression determination unit 106 determines whether or not to suppress the acceleration of the own vehicle according to the amount of depression of the accelerator pedal based on the amount of change in voltage detected by the accelerator voltage detection unit 101 over time. May be. The amount of change in voltage over time can be simply rephrased as the amount of change in voltage, the slope of voltage, and the like. As an example, the suppression determination unit 106 may determine that the acceleration of the own vehicle is suppressed when the amount of change in the voltage detected by the accelerator voltage detection unit 101 per unit time becomes a specified amount or more. The specified amount referred to here is a value for classifying whether or not it is a change amount of the voltage of the accelerator signal corresponding to a sudden start, and is a value that can be arbitrarily set.

The present disclosure is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims, and the present disclosure can be obtained by appropriately combining the technical means disclosed in the different embodiments. The embodiments are also included in the technical scope of the present disclosure. Further, the control unit and the method thereof described in the present disclosure may be realized by a dedicated computer constituting a processor programmed to execute one or a plurality of functions embodied by a computer program. Alternatively, the apparatus and method thereof described in the present disclosure may be realized by a dedicated hardware logic circuit. Alternatively, the apparatus and method thereof described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor for executing a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transitional tangible recording medium as an instruction executed by the computer.

1,1a Sudden start prevention system, 10,10a Adjustment ECU (sudden start prevention device), 20 Accelerator pedal unit, 30 Accelerator depression sensor, 40 Brake pedal unit, 101, 101a Accelerator voltage detection unit, 103, 103a Memory determination unit, 104 storage unit, 105, 105a storage update unit, 106 suppression determination unit, 107 accelerator voltage output unit (suppression processing unit)

Claims (12)

Used in vehicles,
Accelerator voltage detection units (101, 101a) that detect the voltage output from the accelerator pedal unit (20) of the vehicle according to the amount of depression of the accelerator pedal of the vehicle.
A storage determination unit (103, 103a) that automatically determines the voltage to be stored from the voltages detected by the accelerator voltage detection unit based on the identification that the accelerator pedal is in a predetermined constant state. )When,
A storage unit (104) that stores a reference voltage, which is the voltage determined to be stored by the storage determination unit, and a storage unit (104).
A suppression determination unit (106) that determines whether or not to suppress acceleration of the vehicle according to the amount of depression of the accelerator pedal, and
When the suppression determination unit determines that the acceleration of the vehicle corresponding to the depression amount of the accelerator pedal is suppressed, the reference voltage stored in the storage unit is used according to the depression amount of the accelerator pedal. A sudden start prevention device including a suppression processing unit (107) that suppresses acceleration of the vehicle. In claim 1,
The storage determination unit is a sudden start prevention device that determines a voltage detected by the accelerator voltage detection unit as a voltage to be stored when it is specified that the accelerator pedal is not depressed and the accelerator is not depressed. In claim 2,
When the suppression processing unit determines that the suppression determination unit suppresses the acceleration of the vehicle according to the amount of depression of the accelerator pedal, the suppression processing unit specifies that the accelerator is not depressed, which is stored in the storage unit. In this case, the reference voltage detected by the accelerator voltage detection unit is used in place of the voltage output from the accelerator pedal unit to a device that controls the traveling drive source of the vehicle according to the voltage output from the accelerator pedal unit. A sudden start prevention device that suppresses acceleration of the vehicle according to the amount of depression of the accelerator pedal by outputting to. In claim 2 or 3,
When the memory determination unit detects a voltage output from the brake pedal unit (30) of the vehicle according to the amount of depression of the brake pedal of the vehicle, the storage determination unit prevents sudden start to identify that the accelerator is not depressed. Device. In claim 2 or 3,
The memory determination unit is a sudden start prevention device that identifies a state in which the accelerator is not depressed within a threshold time from the start of the traveling drive source of the vehicle. In claim 2 or 3,
The memory determination unit is a sudden start prevention device that identifies the accelerator pedal not being depressed when the accelerator depression sensor (40) for detecting the depression of the accelerator pedal does not detect the depression of the accelerator pedal. In claim 2 or 3,
The memory determination unit detects a voltage output from the brake pedal unit of the vehicle according to the amount of depression of the brake pedal of the vehicle, and within a threshold time from the start of the traveling drive source of the vehicle, and the accelerator. Sudden start to identify that the accelerator is not depressed when at least one or more of the three conditions of the case where the accelerator depression sensor that detects the depression of the pedal does not detect the depression of the accelerator pedal is satisfied. Prevention device. In any one of claims 2 to 7,
A storage update unit (105, 105a) for updating the reference voltage stored in the storage unit is provided.
When the accelerator voltage detection unit detects a voltage lower than the reference voltage stored in the storage unit, the storage update unit uses the voltage lower than the reference voltage as a new reference voltage. Sudden start prevention device to perform. In claim 8,
There are two systems that output voltage from the accelerator pedal unit according to the amount of depression of the accelerator pedal.
The accelerator voltage detection unit (101a) individually detects the voltages output from these two systems of the accelerator pedal unit, respectively.
The memory update unit is a sudden start prevention device that updates the reference voltage only when the difference between the voltages of the two systems detected by the accelerator voltage detection unit is a constant value. In any one of claims 1 to 9,
There are two systems that output voltage from the accelerator pedal unit according to the amount of depression of the accelerator pedal.
The accelerator voltage detection unit (101a) individually detects the voltages output from these two systems of the accelerator pedal unit, respectively.
The storage determination unit (103a) is a sudden start prevention device that determines a voltage to be stored only when the difference between the voltages of the two systems detected by the accelerator voltage detection unit is a constant value. In any one of claims 1 to 10,
The suppression determination unit suppresses acceleration of the vehicle according to the amount of depression of the accelerator pedal by comparing the reference voltage stored in the storage unit with the voltage detected by the accelerator voltage detection unit. A sudden start prevention device that determines whether or not to do so. In any one of claims 1 to 10,
The suppression determination unit is a sudden start prevention device that determines whether or not to suppress acceleration of the vehicle according to the amount of depression of the accelerator pedal based on the amount of change in voltage detected by the accelerator voltage detection unit.

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