JP2013154714A - In-vehicle electronic controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily employ a technology of limiting an output from a traveling power source by stepping on a brake pedal to a vehicle regardless of a type of a traveling power source of the vehicle.SOLUTION: A vehicle control system controls a vehicle using a correction accelerator opening indicative of a degree of an opening of an accelerator by an accelerator pedal installed in the vehicle. The vehicle control system determines whether the vehicle is in a state that both pedals are stepped on, the accelerator pedal is stepped on, and a brake pedal installed in the vehicle is also stepped on (S10, S30). When determining that the vehicle is in the state that both the pedals are stepped on (S10: YES, S30: YES), the vehicle control system limits the correction accelerator opening not larger than a preset accelerator opening limit value (S90 to S130). This technology limits not a throttle opening but an accelerator opening, and therefore can be applied to a vehicle having a traveling power source without requiring a throttle actuator.

Description

  The present invention relates to an on-vehicle electronic control device that controls a vehicle using accelerator opening information.

  2. Description of the Related Art Conventionally, a technique for controlling a throttle actuator so that the upper limit value of the throttle opening becomes smaller regardless of the amount of depression of the accelerator pedal as the amount of depression of the brake pedal increases is known (see, for example, Patent Document 1) . As a result, even if an abnormality occurs in the accelerator pedal and the accelerator opening becomes large against the driver's intention, the driver depresses the brake pedal to suppress an increase in engine output. It is possible to prevent the vehicle from starting against the intention.

JP-A-6-247188

  However, since the technique described in Patent Document 1 controls the throttle opening based on the depression amount of the brake pedal, a vehicle (for example, an electric vehicle) having a driving power source (for example, a motor) that does not require a throttle actuator. There has been a problem that it cannot be easily applied to systems of automobiles and hybrid cars.

  The present invention has been made in view of these problems, and it is an object of the present invention to easily apply a technique for limiting the output of a traveling power source by depressing a brake pedal regardless of the type of the traveling power source. And

  In the vehicle-mounted electronic control device according to claim 1, which is made to achieve the above object, the vehicle is controlled using accelerator opening information indicating an accelerator opening of an accelerator pedal attached to the vehicle, and the determination unit includes: It is determined whether or not the accelerator pedal is depressed and the brake pedal attached to the vehicle is depressed, and the accelerator opening restriction means is in the depressed state of both pedals. When determined by the determining means, the value of the accelerator opening information is limited so as to be equal to or less than a predetermined accelerator opening limit value.

  According to the on-vehicle electronic control device configured as described above, even when an abnormality occurs in the accelerator pedal and the accelerator opening increases against the driver's intention, the driver depresses the brake pedal. Thus, the value of the accelerator opening information used for controlling the vehicle can be made equal to or less than the accelerator opening limit value, and the output of the driving power source mounted on the vehicle can be limited. Thus, when an abnormality occurs in the accelerator pedal, it is possible to prevent the vehicle from starting against the driver's intention by the braking force of the brake.

  And when the pedals are depressed, the throttle opening is limited, not the throttle opening. Therefore, not only the vehicle equipped with the engine that is the driving power source that requires the throttle actuator but also the throttle actuator The vehicle-mounted electronic control device of the present invention can also be applied to a vehicle (for example, an electric vehicle and a hybrid vehicle) provided with a traveling power source that is unnecessary.

  That is, by using the on-vehicle electronic control device of the present invention, the technology for limiting the output of the traveling power source by depressing the brake pedal can be easily applied regardless of the type of the traveling power source.

  Further, in the on-vehicle electronic control device according to claim 1, as described in claim 2, the determination means is greater than or equal to an accelerator depression determination value set in advance such that the accelerator opening of the accelerator pedal is greater than zero. In such a case, it may be determined that the accelerator pedal is depressed.

  In the on-vehicle electronic control device configured as described above, even when the accelerator pedal is depressed and the brake pedal is depressed, if the accelerator opening is less than the accelerator depression determination value, the accelerator is opened. The value of the degree information is not restricted below the accelerator opening limit value.

  For this reason, when starting a hill by releasing the brake pedal from the state where both the brake pedal and the accelerator pedal are depressed, the brake pedal is depressed by making the accelerator opening less than the accelerator depression determination value. Even if it is, the driving force of the driving power source corresponding to the accelerator opening less than the accelerator depression determination value can be ensured. As a result, even when a technique for limiting the value of the accelerator opening information by stepping on the brake pedal is applied, it is possible to start smoothly on a slope.

  Further, in the on-vehicle electronic control device according to claim 1 or 2, as described in claim 3, the accelerator opening restriction means shifts from a state where both pedals are depressed to a state where the brake pedal is not depressed. At this point, the restriction on the accelerator opening information may be released.

  According to the on-vehicle electronic control device configured as described above, when starting a slope by releasing the brake pedal from a state where both the brake pedal and the accelerator pedal are depressed, the value of the accelerator opening information is Even if it is limited to the accelerator opening limit value or less, immediately after the depression of the brake pedal is released, the value of the accelerator opening information increases toward the actual accelerator opening of the accelerator pedal. That is, the driving force of the driving power source corresponding to the actual accelerator opening of the accelerator pedal can be obtained in a short time after releasing the depression of the brake pedal. As a result, even when a technique for limiting the value of the accelerator opening information by stepping on the brake pedal is applied, it is possible to start smoothly on a slope.

  Further, in the on-vehicle electronic control device according to any one of claims 1 to 3, as described in claim 4, the actual accelerator opening is set as the actual accelerator opening, and the amount of change is limited. When the means changes the value of the accelerator opening information from the value restricted by the accelerator opening restricting means to a value indicating the actual accelerator opening, or the value of the accelerator opening information is changed to the actual accelerator opening When changing from the value shown to a value restricted by the accelerator opening restriction means, the amount of change per unit time of the value of the accelerator opening information is restricted to be equal to or less than a preset change restriction value, The change limit value may be different depending on whether the value of the accelerator opening information changes so as to increase or the value of the accelerator opening information changes so as to decrease.

  According to the on-vehicle electronic control device configured as described above, it is possible to suppress a rapid change in the driving force of the driving power source, and to change the accelerator opening information so that the value of the accelerator opening information becomes small. The change limit value can be appropriately set for each case where the value of the opening degree information is changed so as to increase.

  For this reason, for example, when the actual accelerator opening is fully opened due to an abnormality in the accelerator pedal and the value of the accelerator opening information is limited by the driver depressing the brake pedal, the accelerator opening information By reducing the value and limiting the driving force of the driving power source, it is possible to prevent the vehicle from starting contrary to the driver's intention.

  Further, for example, when the restriction on the accelerator opening information is released and the value of the accelerator opening information increases toward the actual accelerator opening, if the driving force of the driving power source suddenly increases, Since there is a possibility of giving a heart, it is preferable to set the change limit value so that the value of the accelerator opening information gradually increases.

1 is a block diagram showing a configuration of a vehicle control system 1. FIG. It is a flowchart which shows an accelerator opening restriction process. It is a timing chart explaining an accelerator opening restriction process.

Embodiments of the present invention will be described below with reference to the drawings.
A vehicle control system 1 to which the present invention is applied is mounted on a vehicle and includes a power control device 2, an accelerator opening sensor 3, and a brake pedal sensor 4, as shown in FIG.

  The power control device 2 is configured around a known microcomputer including a CPU, a ROM, a RAM, an I / O, a bus line connecting these configurations, and the like, and based on a program stored in the ROM and the RAM. Perform various processes.

The accelerator opening sensor 3 detects the accelerator opening corresponding to the amount of depression of the accelerator pedal by the driver.
The brake pedal sensor 4 detects a brake depression amount corresponding to a brake pedal operation by the driver.

  Then, the power control device 2 inputs the detection signal output by the accelerator opening sensor 3 and the detection signal output by the brake pedal sensor 4 to correct the accelerator opening detected by the accelerator opening sensor 3, Based on the corrected accelerator opening (hereinafter referred to as the corrected accelerator opening), the rotation of the power machine 5 (engine or motor) mounted on the vehicle is controlled. For example, when the power machine 5 is an engine, the throttle actuator (not shown) is used, and when the power machine 5 is a motor, the motor drive device (not shown) is used to control the rotation of the power machine 5.

  Here, the procedure of the accelerator opening correction process executed by the power control device 2 will be described with reference to FIG. The accelerator opening correction process is a process that is repeatedly executed at regular intervals (for example, 10 ms) during the operation of the power control device 2.

  When the accelerator opening correction process is executed, the power control device 2 first sets an accelerator opening (hereinafter referred to as an actual accelerator opening) based on the detection result of the accelerator opening sensor 3 in S10. It is determined whether or not the accelerator opening limit value is larger than 20% in this embodiment (for example, 20% in this embodiment).

  Here, when the actual accelerator opening is equal to or less than the accelerator opening limit value (S10: NO), in S20, the state where both the accelerator pedal and the brake pedal are depressed (hereinafter referred to as the both pedal depression state). ) Is initialized, that is, the value of the duration counter is set to 0, and the process proceeds to S70.

  On the other hand, when the actual accelerator opening is larger than the accelerator opening limit value (S10: YES), a state in which the brake pedal is depressed (hereinafter referred to as brake) based on the detection result of the brake pedal sensor 4 in S30. It is determined whether it is ON). If the brake is not on (S30: NO), the accelerator opening target value is set to the actual accelerator opening in S40, and the process proceeds to S70. On the other hand, if the brake is on (S30: YES), the accelerator opening target value is set to the accelerator opening limit value in S50, and the duration counter is incremented (added by 1) in S60. , The process proceeds to S70.

  Then, when the process proceeds to S70, the value of the continuation time counter is set in advance to determine whether or not both pedals are depressed (in this embodiment, for example, a value corresponding to 1 second). Judge whether it is larger. Here, when the value of the duration counter is equal to or smaller than the both depression state determination value (S70: NO), the corrected accelerator opening is set to the actual accelerator opening in S80, and the accelerator opening correction process is temporarily performed. finish.

  On the other hand, when the value of the duration counter is larger than the both-depression state determination value (S70: YES), the accelerator opening target value is the accelerator opening decrease value preset from the previous corrected accelerator opening in S90. It is determined whether or not the value is equal to or greater than a value obtained by subtracting (hereinafter referred to as a corrected accelerator opening after decrease). The previous corrected accelerator opening is the corrected accelerator opening in the previous process for the accelerator opening correction process that is repeatedly executed. The accelerator opening decrease value is a value indicating a decrease in the corrected accelerator opening in one cycle in which the accelerator opening correction process is executed.

  Here, when the accelerator opening target value is less than the corrected accelerator opening after the decrease (S90: NO), the corrected accelerator opening is subtracted from the previous corrected accelerator opening in S100. The subtracted value (corrected accelerator opening after decrease) is set, and the accelerator opening correction process is temporarily terminated.

  On the other hand, when the accelerator opening target value is equal to or greater than the corrected accelerator opening after decrease (S90: YES), the accelerator opening target value is set in advance to the previously corrected accelerator opening in S110. It is determined whether or not it is less than a value obtained by adding the increase value (hereinafter referred to as a post-increase corrected accelerator opening). The accelerator opening increase value is a value indicating an increase in the corrected accelerator opening in one cycle in which the accelerator opening correction process is executed. The accelerator opening increase value is set to be smaller than the accelerator opening decrease value.

  If the accelerator opening target value is greater than or equal to the corrected accelerator opening after the increase (S110: NO), the corrected accelerator opening is added in S120, and the accelerator opening increase is added to the previous corrected accelerator opening. The added value (corrected accelerator opening after increase) is set, and the accelerator opening correction process is temporarily terminated.

  On the other hand, if the accelerator opening target value is less than the corrected corrected accelerator opening (S110: YES), the corrected accelerator opening is set to the accelerator opening target value in S130, and the accelerator opening correction process is performed. Exit once.

Next, a specific example regarding the setting of the corrected accelerator opening will be described with reference to FIG.
First, at time t0, the brake pedal is not depressed (hereinafter referred to as “brake off”) (S30: NO), and the actual accelerator opening is 0% (S10: NO). Therefore, the corrected accelerator opening is set to the actual accelerator opening (0%) (S80).

  Thereafter, at time t1 when the actual accelerator opening increases and reaches the accelerator opening limit value, it is determined that the both pedals are not depressed because the brake is off (S30: NO), and the accelerator opening target value is corrected. The accelerator opening is set to the actual accelerator opening (S40, S80).

  Then, when the brake is turned on at time t2 when the actual accelerator opening increases and reaches 100% (S30: YES), the accelerator is opened because the actual accelerator opening is larger than the accelerator opening limit value (S10: YES). The degree target value is set to the accelerator opening limit value (S50). However, at this time, since the duration counter value is smaller than the both depressed state determination value (S70: NO), it is determined that the both pedals are not depressed, and the corrected accelerator opening is set to the actual accelerator opening (100%). It is set (S80).

  Further, at time t3 when the brake-on continues and the duration counter value reaches the double depression state determination value (S70: YES), it is determined that the two pedals are depressed, and the corrected accelerator opening is the accelerator opening limit value. Since it is larger than (accelerator opening target value) (S90: NO), the corrected accelerator opening decreases toward the accelerator opening limit value (accelerator opening target value) (S100). At time t4, the corrected accelerator opening coincides with the accelerator opening limit value (accelerator opening target value) (S130).

  After that, since the state where the brake is on and the actual accelerator opening is larger than the accelerator opening limit value continues until time t5, it is determined that both pedals are depressed during the period from time t4 to time t5. The target opening value and the corrected accelerator opening are set to the accelerator opening limit value.

  At time t5, because the brake is off (S30: NO), it is determined that the two pedals are not depressed, and the accelerator opening target value is set to the actual accelerator opening (100%) (S40). Since the corrected accelerator opening is smaller than the accelerator opening target value (S110: NO), the corrected accelerator opening increases toward the accelerator opening target value (100%) (S120). At time t6, the corrected accelerator opening matches the accelerator opening target value (100%) (S130).

  Thereafter, the actual accelerator opening gradually decreases, and the actual accelerator opening becomes 0% at time t7. During the period from time t6 to time t7, since the brake is off (S30: NO), it is determined that the two pedals are not depressed, and the accelerator opening target value is set to the actual accelerator opening. (S40) Since the corrected accelerator opening is set to the accelerator opening target value (S130), the accelerator opening target value and the corrected accelerator opening coincide with the actual accelerator opening.

  At time t7, the brake is turned on. Note that, during the period from time t7 to time t8, the actual accelerator opening is 0% (S10: NO), so it is determined that both pedals are not depressed, and the corrected accelerator opening is the actual accelerator opening (0 %) (S80).

  Thereafter, the actual accelerator opening increases. That is, it is an operation of depressing the accelerator pedal after depressing the brake pedal, and a pedal operation for starting a slope is performed by the driver.

  At time t9, if the actual accelerator opening exceeds the accelerator opening limit value (S10: YES), the brake is on at this time (S30: YES), so the accelerator opening target value becomes the accelerator opening limit value. It is set (S50).

  Then, at time t10 when the continuation time counter value reaches the double depression state determination value (S70: YES), it is determined that the two pedals are depressed, and the corrected accelerator opening is the accelerator opening limit value (accelerator opening target value). Since it is larger (S90: NO), the corrected accelerator opening decreases toward the accelerator opening limit value (accelerator opening target value) (S100).

  Note that, during the period from time t9 to time t10, since it is determined that the two pedals are not depressed, the corrected accelerator opening is set to the actual accelerator opening (S80). It becomes larger than the degree limit value.

  At time t11, the corrected accelerator opening coincides with the accelerator opening limit value (accelerator opening target value) (S130). After that, since the state where the brake is on and the actual accelerator opening is larger than the accelerator opening limit value continues until time t12, it is determined that both pedals are depressed during the period from time t10 to time t12. The accelerator opening target value and the corrected accelerator opening are set to the accelerator opening limit value.

  At time t12, because the brake is turned off (S30: NO), it is determined that the two pedals are not depressed, the accelerator opening target value is set to the actual accelerator opening (S40), and the corrected accelerator opening is set. Is smaller than the accelerator opening target value (S110: NO), the corrected accelerator opening increases toward the accelerator opening target value (actual accelerator opening) (S120). The actual accelerator opening starts to decrease from 100% at time t12 and becomes 0% at time t14.

At time t13, the corrected accelerator opening matches the accelerator opening target value (actual accelerator opening) (S130).
In the vehicle control system 1 configured as described above, the vehicle is controlled using the corrected accelerator opening indicating the accelerator opening of the accelerator pedal attached to the vehicle, and the accelerator pedal is depressed and attached to the vehicle. It is determined whether or not the both pedals are depressed (S10, S30), and the brake pedal is depressed (S10: YES, S30: YES). The corrected accelerator opening is limited to be equal to or less than a preset accelerator opening limit value (S50, S90 to S130).

  According to the vehicle control system 1 configured as described above, even when an abnormality occurs in the accelerator pedal and the accelerator opening increases against the driver's intention, the driver depresses the brake pedal. Thus, the value of the corrected accelerator opening used for controlling the vehicle can be made equal to or less than the accelerator opening limit value, and the output of the power machine 5 mounted on the vehicle can be limited. Thus, when an abnormality occurs in the accelerator pedal, it is possible to prevent the vehicle from starting against the driver's intention by the braking force of the brake.

  And when the pedals are depressed, the throttle opening is limited, not the throttle opening. Therefore, not only the vehicle equipped with the engine that is the driving power source that requires the throttle actuator but also the throttle actuator The vehicle control system 1 can also be applied to a vehicle (for example, an electric vehicle and a hybrid vehicle) having a traveling power source that is unnecessary.

  That is, by using the vehicle control system 1, the technology for limiting the output of the travel power source by depressing the brake pedal can be easily applied regardless of the type of the travel power source.

  Further, when the accelerator opening of the accelerator pedal is equal to or larger than an accelerator opening limit value set in advance so as to be larger than 0, it is determined that the accelerator pedal is depressed (S10).

  In the vehicle control system 1 configured as described above, even when the accelerator pedal is depressed and the brake pedal is depressed, the correction is performed when the accelerator opening is less than the accelerator opening limit value. The value of the accelerator opening is not restricted below the accelerator opening limit value.

  For this reason, when starting a slope by releasing the depression of the brake pedal from the state where both the brake pedal and the accelerator pedal are depressed, the brake pedal is made less than the accelerator opening limit value. Even if it is depressed, the driving force of the power machine 5 corresponding to the accelerator opening less than the accelerator opening limit value can be secured. As a result, even if a technique for limiting the value of the corrected accelerator opening by applying the brake pedal is applied, it is possible to start smoothly on a slope.

Further, when the state where both the pedals are depressed is shifted to a state where the brake pedal is not depressed (S30: NO), the restriction on the accelerator opening information is released (S40).
According to the vehicle control system 1 configured as described above, when the vehicle starts on a hill by releasing the brake pedal from the state where both the brake pedal and the accelerator pedal are depressed, the value of the corrected accelerator opening is determined. Even if it is limited to the accelerator opening limit value or less, immediately after the depression of the brake pedal is released, the value of the corrected accelerator opening increases toward the actual accelerator opening of the accelerator pedal. That is, the driving force of the power machine 5 according to the actual accelerator opening of the accelerator pedal can be obtained in a short time after releasing the depression of the brake pedal. As a result, even if a technique for limiting the value of the corrected accelerator opening by applying the brake pedal is applied, it is possible to start smoothly on a slope.

  When the value of the corrected accelerator opening is changed from the accelerator opening limit value to the value indicating the actual accelerator opening, or the value of the corrected accelerator opening is changed from the value indicating the actual accelerator opening. When changing to the limit value, the change amount per unit time of the value of the corrected accelerator opening is limited to be less than the preset accelerator opening increase value or accelerator opening decrease value, and the accelerator opening The increase value and the accelerator opening decrease value are different.

  According to the vehicle control system 1 configured as described above, it is possible to suppress a sudden change in the driving force of the power machine 5 and to change the correction accelerator opening so that the value of the correction accelerator opening decreases. The amount of change per unit time can be appropriately set in each case where the degree value changes so as to increase.

  Further, when the state where the accelerator pedal is depressed and the brake pedal is depressed continues for a time corresponding to the both depressed state determination value (S70: YES), the value of the corrected accelerator opening is limited. In this way, by providing a time margin until it is determined that the both pedals are depressed, the accelerator opening is increased more than the accelerator opening limit value during the time corresponding to the both depressed state determination value. Therefore, it is possible to prevent the acceleration from becoming sluggish.

  In the embodiment described above, the vehicle control system 1 is an on-vehicle electronic control device according to the present invention, the processes at S10, S30, and S70 are judgment means according to the present invention, and the processes at S50 and S90 to S130 are accelerator opening restriction means according to the present invention. The corrected accelerator opening is the accelerator opening information in the present invention, the accelerator opening limit value is the accelerator depression determination value in the present invention, and the processing of S90 to S120 is the change amount limiting means, the accelerator opening increase value and the accelerator opening in the present invention. The degree decrease value is a change limit value in the present invention.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, As long as it belongs to the technical scope of this invention, a various form can be taken.
For example, in the above-described embodiment, the value of the corrected accelerator opening is limited when the pedal is depressed, but in addition to the limitation of the value of the corrected accelerator opening, an indicator lamp or the like indicates that the pedal is depressed. The driver may be informed so as to alert the driver.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle control system, 2 ... Power control device, 3 ... Accelerator opening sensor, 4 ... Brake pedal sensor, 5 ... Power machine

Claims (4)

An on-vehicle electronic control device that controls the vehicle using accelerator opening information indicating an accelerator opening of an accelerator pedal mounted on the vehicle and attached to the vehicle,
Judgment means for judging whether or not the pedal is depressed and the brake pedal attached to the vehicle is depressed.
Accelerator opening degree limiting means for limiting the value of the accelerator opening information so as to be less than or equal to a predetermined accelerator opening limit value when the determination means determines that the pedal is depressed. An on-vehicle electronic control device comprising: The determination means includes
The accelerator pedal is determined to be depressed when an accelerator opening of the accelerator pedal is equal to or greater than an accelerator depression determination value set in advance so as to be larger than zero. In-vehicle electronic control device. The accelerator opening limiting means is
3. The vehicle-mounted electronic control according to claim 1, wherein the restriction on the accelerator opening information is released at a time point when the brake pedal is not depressed from a state where the two pedals are depressed. apparatus. As the actual accelerator opening, the actual accelerator opening of the accelerator pedal,
When changing the value of the accelerator opening information from the value limited by the accelerator opening limiting means to a value indicating the actual accelerator opening, or changing the value of the accelerator opening information to the actual accelerator opening When the value indicating the degree is changed to a value restricted by the accelerator opening restriction means, the amount of change per unit time of the value of the accelerator opening information is not more than a preset change restriction value. A change amount limiting means for limiting to
The change limit value is different between a case where the value of the accelerator opening information changes so as to increase and a case where the value of the accelerator opening information changes so as to become small. The vehicle-mounted electronic control apparatus of any one of Claim 3.

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