KR20130039082A - Method for diagnosis of a trouble of accelerator pedal sensor - Google Patents

Method for diagnosis of a trouble of accelerator pedal sensor Download PDF

Info

Publication number
KR20130039082A
KR20130039082A KR1020110103534A KR20110103534A KR20130039082A KR 20130039082 A KR20130039082 A KR 20130039082A KR 1020110103534 A KR1020110103534 A KR 1020110103534A KR 20110103534 A KR20110103534 A KR 20110103534A KR 20130039082 A KR20130039082 A KR 20130039082A
Authority
KR
South Korea
Prior art keywords
accelerator pedal
pedal sensor
voltage value
output
brake
Prior art date
Application number
KR1020110103534A
Other languages
Korean (ko)
Inventor
도형수
서인근
Original Assignee
주식회사 현대케피코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 현대케피코 filed Critical 주식회사 현대케피코
Priority to KR1020110103534A priority Critical patent/KR20130039082A/en
Publication of KR20130039082A publication Critical patent/KR20130039082A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/501—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/602—Pedal position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

The present invention relates to a method for diagnosing a failure of an accelerator pedal sensor. The method for diagnosing a failure of an accelerator pedal sensor includes: a detecting step of detecting whether an output of an accelerator pedal sensor of a vehicle is fixed; A sensing step of detecting whether the brake is operated; And when the output fixation of the accelerator pedal sensor is detected in the detecting step and the brake operation is sensed in the detecting step, it is determined that the accelerator pedal is abnormally developed to ignore the output voltage value of the accelerator pedal sensor and determine it as a failure. Determination step; And controlling the accelerator pedal opening amount when the output fixation of the accelerator pedal sensor is determined. According to the present invention, it is possible to prevent the occurrence of a traffic accident by determining whether the accelerator pedal sensor has failed and controlling the opening degree of the accelerator pedal based on whether the accelerator pedal sensor is fixed and whether the brake signal is detected.

Description

Method for diagnosis of a trouble of accelerator pedal sensor

The present invention relates to a method for diagnosing a failure of an accelerator pedal sensor, and more particularly, based on whether the accelerator pedal sensor is stuck and whether a brake signal is detected, determining whether the accelerator pedal sensor has failed and controlling the opening amount of the accelerator pedal. The present invention relates to a method for diagnosing a failure of an accelerator pedal sensor.

BACKGROUND ART In general, a motor vehicle is composed of a chassis, which is a skeleton of a vehicle body, a power unit for generating and transmitting power, a steering unit for controlling a driving direction, a suspension device, a braking device, and the like.

The power unit provides power for driving the car. This power is mainly the engine of the internal combustion engine, and increases or decreases the output of the engine to increase or decrease the vehicle speed. The driver opens and closes the accelerator pedal to control the vehicle speed.

The conventional accelerator pedal structure has been mechanically configured such that the engine throttle valve and the accelerator pedal are connected by a cable, but recently, a position sensor is attached to the accelerator pedal, and the position information value of the position sensor is detected. The electronic system which controls the opening and closing of the throttle valve by grasping the opening / closing angle of the throttle valve is becoming common.

However, since an electronic accelerator pedal is operated by an electrical signal, abnormal malfunction may occur due to external noise or other factors. If the accelerator pedal sensor fails, the car cannot be controlled according to the driver's intention, which leads to a traffic accident, which is a serious problem for the driver's safety.

The problem to be solved by the present invention, the accelerator pedal sensor to determine whether the accelerator pedal sensor failure based on whether the accelerator pedal sensor is fixed and whether the brake signal is detected and the accelerator pedal opening amount is controlled to prevent the occurrence of traffic accidents. To provide a method for diagnosing faults.

In order to solve the above technical problem, a method of diagnosing a failure of an accelerator pedal sensor may include: detecting whether an output of an accelerator pedal sensor of a vehicle is fixed; A sensing step of detecting whether the brake is operated; And when the output fixation of the accelerator pedal sensor is detected in the detecting step and the brake operation is sensed in the detecting step, it is determined that the accelerator pedal is abnormally developed to ignore the output voltage value of the accelerator pedal sensor and determine it as a failure. Determination step; And controlling the accelerator pedal opening amount when the output fixation of the accelerator pedal sensor is determined.

The detecting step may include: a measuring step of measuring an output voltage value of the accelerator pedal sensor, a rate of change of the output voltage value, and a vehicle speed of the vehicle; And a comparison step of comparing the numerical values obtained in the measuring step with a preset output fixation detection value.

In the comparing step, the output voltage value of the accelerator pedal sensor is greater than the voltage value of 0% of the accelerator pedal opening amount, the rate of change of the output voltage value of the accelerator pedal sensor is 0, and the vehicle speed is greater than zero. It is characterized by comparing the recognition.

The detecting may include determining that the brake is operated when a signal selected from the brake switch signal or the brake light switch signal is detected a predetermined number of times or more within a preset time.

In the controlling step, the accelerator pedal opening amount is set to zero.

When the determination step is satisfied, the display step of displaying whether the output of the accelerator pedal sensor is further fixed.

According to the method of the present invention, it is possible to determine whether the accelerator pedal sensor is broken based on whether the accelerator pedal sensor is fixed and whether the brake signal is detected, and to prevent the occurrence of a traffic accident by controlling the opening amount of the accelerator pedal.

1 is a schematic diagram of an ECU (engine control unit) according to an embodiment of the present invention.
2 is a flowchart illustrating a failure diagnosis method of an accelerator pedal sensor according to an exemplary embodiment of the present invention.
3 is a flowchart of a step of detecting whether the output of the accelerator pedal sensor is fixed according to an embodiment of the present invention and detecting whether the brake is activated to determine a failure.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

As described above, the driver's input signal for acceleration of the vehicle is the only step on the accelerator pedal. Unlike the former throttle valve and the accelerator pedal, which are connected by cables, the latest accelerator pedal has a position sensor, and the throttle valve opens and closes according to the opening and closing angle of the accelerator pedal by detecting a position sensor signal. have.

However, since the accelerator pedal is operated by an electrical signal, malfunction tends to increase due to external factors such as noise or the like, and a control logic for promptly detecting and diagnosing the accelerator pedal is required.

1 is a schematic diagram of an ECU (engine control unit) according to an embodiment of the present invention, Figure 2 is a flow chart showing a failure diagnosis method of the accelerator pedal sensor according to an embodiment of the present invention, Figure 3 is According to an embodiment of the present invention, there is a flow chart of detecting whether the output of the accelerator pedal sensor is stuck or not and determining whether the brake is activated.

As shown in FIG. 1, in relation to a failure diagnosis method of an accelerator pedal sensor, the input unit 10 includes a vehicle speed, an accelerator pedal sensor output voltage value, a brake switch signal, a brake light switch signal, and the like. ) Is outputted to the ECU 20 so that the ECU 20 performs failure diagnosis determination and control of the accelerator pedal sensor according to the present control logic and finally outputs a control signal to the driver 30.

The ECU 20 monitors the signal of the input unit 10 in real time under the operation of the engine. The ECU 20 determines whether the starting is ON according to a signal applied from the engine ignition switch, and performs a failure diagnosis determination of the accelerator pedal sensor based on the electric signal of the input unit 10 in the state that the starting is turned ON. In addition, a predetermined electrical signal is output to control the driver 30.

In the method of diagnosing a failure of the accelerator pedal sensor, as illustrated in FIGS. 2 and 3, a detection step (S10) of detecting an abnormal electric signal of an input unit is first performed for diagnosing a failure of the accelerator pedal sensor.

In the detecting step S10, whether the accelerator pedal itself is broken or whether the output of the accelerator pedal sensor is stuck is detected based on the electrical signal of the input unit 10.

The detection step S10 is mainly referring to FIG. 3, wherein the measurement step S11 of measuring a vehicle speed of the vehicle, the output voltage value of the accelerator pedal sensor, and the rate of change of the output voltage value, and the numerical value and the value obtained in the measurement step S11 are used. A comparison step (S12) of comparing the set output stuck detection value values with each other is included.

The measuring step S11 measures the vehicle speed of the vehicle and measures the rate of change of the output voltage value and the output voltage value of the accelerator pedal sensor.

 It checks in real time whether the vehicle's vehicle speed is above zero. If the vehicle speed is zero, this control logic does not need to be activated. Then, the rate of change of the output voltage value and the output voltage value of the accelerator pedal sensor is measured.

Next, a comparison step S12 is performed. In the comparison step S12, the value obtained in the measurement step S11 and the preset output fixation detection value are compared with each other.

The preset output fixation detection values may be stored in the ECU, which are tabled with values provided by the manufacturer, and these numerical values may be set differently for each vehicle and each vehicle, such as a vehicle state and a structure of a driving unit.

In this embodiment, as the output fixation detection value, the output voltage value of the accelerator pedal sensor is set to Vapp_r = 0% (where Vapp_r = 0% is the voltage value at which the accelerator pedal opening amount is 0%). If the output voltage of the accelerator pedal sensor is Vapp_r = 0%, this means that the driver does not operate the accelerator pedal.

In addition, if the rate of change of the output voltage value of the accelerator pedal sensor is not 0, it means that the driver is operating the accelerator pedal arbitrarily, which means that the accelerator pedal sensor is properly outputting the output voltage value.

In this case, when the output voltage value of the accelerator pedal sensor is Vapp_r = 0% or the rate of change of the output voltage value of the accelerator pedal sensor is 0, the detection step S10 is fed back to the detection step S10 without being entered into the detection step S20 and the detection step. (S10) is repeatedly monitored.

If, in the comparison step (S12), the actual output voltage value of the accelerator pedal sensor is greater than Vapp_r = 0%, and the rate of change of the output voltage value of the accelerator pedal sensor is 0, it is determined that the output adhesion of the accelerator pedal sensor is suspected. It is possible.

In the present embodiment, the rate of change of the output voltage value of the accelerator pedal sensor is set to 0 and determined. However, in another embodiment, a predetermined value or a predetermined interval value other than 0 may be set.

The sensing step S20 is a step of detecting whether the output fixation of the accelerator pedal sensor has occurred, and is a step of detecting whether it is an emergency situation from an actual driver's driving state.

In more detail, as illustrated in FIG. 3, in the detecting step S20, when at least one signal of the brake switch signal or the brake light switch signal is detected more than a predetermined number N within a preset time T period. It is determined that the driver is operating the brake urgently (S21).

That is, when the driver is in an emergency situation, for example, the accelerator pedal is kept pressed, unlike the intention of the driver, or the accelerator pedal is broken so that the output voltage value of the predetermined accelerator pedal sensor is notified to the ECU 20. When outputting, the driver presses the brake to stop the driving car. The driver detects this signal and detects whether the output of the accelerator pedal sensor is stuck.

Here, the number of brake operations counted during the detected time interval and the time interval is checked. Alternatively, it may be determined based on other output factors in the sensing step, which may be set differently for each vehicle type, vehicle speed, and system.

Meanwhile, in the present exemplary embodiment, the sensing step is considered in consideration of at least one of the brake switch signal and the brake light switch signal among the electrical signals related to the brake device. However, the sensing step is performed based on the electrical signals related to other brake devices. It can also be configured.

In the determination step S30, when both the detection step S10 and the detection step S20 are satisfied, it is determined that the accelerator pedal is abnormally developed, and the accelerator pedal sensor is determined to be a failure (S31).

Determination step (S30), the detection step (S10) is performed, the output voltage value of the accelerator pedal sensor detects the output stuck, detects that the driver is operating the brake in the detection step (S20), then proceeds sequentially do.

In addition, if the determination step (S30) is satisfied, it may further include a display step for indicating whether the output of the accelerator pedal sensor is stuck.

Then, if it is determined that the Excel sensor sensor failure, the control step (S40) is performed.

The control step (S40) disregards the output voltage value of the currently input accelerator pedal sensor and sets the opening amount of the accelerator pedal to 0. (S41) In the ECU 20, the driving unit (based on the accelerator pedal opening amount is 0). By outputting the control signal to 30, the throttle valve is closed and the vehicle speed is reduced.

Thereafter, a step of comparing the output voltage value of the accelerator pedal sensor and the voltage value of the accelerator pedal opening amount 0% is performed. (S42) In the comparing step S42, the output voltage value of the accelerator pedal sensor is the accelerator pedal opening amount. If less than or equal to a voltage value of 0% (for example, the physical obstacle of the accelerator pedal is removed, etc.), it is fed back to the detection step (S10) as shown in Figure 3 to perform a normal monitoring operation, If large, the step (S41) of setting the accelerator pedal opening amount to zero is repeated.

In addition, although not shown in the drawings, it may further include a vehicle stopping step of monitoring whether the brake operation state, the continuous braking operation state, forcibly stopping the vehicle by controlling the braking device. Here, the continuous brake state determination may be set in advance by detecting the number of brake operations and the brake operation strength within a predetermined time interval.

With this Likewise, in the event of a failure of the accelerator pedal sensor, which is a part directly connected to the vehicle accident of the vehicle, the control logic may force the vehicle speed to be decelerated to prevent traffic accidents.

In addition, even if the accelerator pedal is developed differently from the driver's intention due to the physical fixation phenomenon of the accelerator pedal due to the external environment, not the malfunction or malfunction of the accelerator pedal sensor itself, the control logic can secure the driver's safety. have.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Input unit
20: ECU
30:

Claims (6)

Detecting whether the output of the accelerator pedal sensor of the vehicle is fixed;
A sensing step of detecting whether the brake is operated; And
When the output fixation of the accelerator pedal sensor is detected in the detecting step and the brake operation is sensed in the detecting step, it is determined that the accelerator pedal is abnormally developed, and the output voltage value of the accelerator pedal sensor is ignored and determined to be a failure. step; And
And a control step of controlling the opening amount of the accelerator pedal when the output fixation of the accelerator pedal sensor is determined. The method according to claim 1,
The detecting step,
A measuring step of measuring an output voltage value of the accelerator pedal sensor, a rate of change of the output voltage value, and a vehicle speed of the vehicle; And
And a comparison step of comparing the numerical value obtained in the measuring step with a preset output fixation detection value value to each other. The method according to claim 2,
In the comparing step, the output voltage value of the accelerator pedal sensor is greater than the voltage value of 0% of the accelerator pedal opening amount, the rate of change of the output voltage value of the accelerator pedal sensor is 0, and the vehicle speed is greater than zero. Failure diagnosis method of the Excel pedal sensor, characterized in that comparing the recognition. The method according to claim 1,
The detecting step may include determining that the brake is operated when a signal selected from the brake switch signal or the brake light switch signal is detected more than a predetermined number of times within a preset time. The method according to claim 1,
The control step, fault diagnosis method of the accelerator pedal sensor, characterized in that for setting the accelerator pedal opening amount to zero. The method according to claim 1,
If the determination step is satisfied, further comprising a display step of indicating whether the output of the accelerator pedal sensor is stuck.
KR1020110103534A 2011-10-11 2011-10-11 Method for diagnosis of a trouble of accelerator pedal sensor KR20130039082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110103534A KR20130039082A (en) 2011-10-11 2011-10-11 Method for diagnosis of a trouble of accelerator pedal sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110103534A KR20130039082A (en) 2011-10-11 2011-10-11 Method for diagnosis of a trouble of accelerator pedal sensor

Publications (1)

Publication Number Publication Date
KR20130039082A true KR20130039082A (en) 2013-04-19

Family

ID=48439354

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110103534A KR20130039082A (en) 2011-10-11 2011-10-11 Method for diagnosis of a trouble of accelerator pedal sensor

Country Status (1)

Country Link
KR (1) KR20130039082A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160128040A (en) 2015-04-28 2016-11-07 대동공업주식회사 Operating Method of Pedals Systems for Tractor
CN112109648A (en) * 2020-09-30 2020-12-22 北京车和家信息技术有限公司 Method for detecting clamping stagnation of accelerator pedal and vehicle control unit
CN112158149A (en) * 2020-08-26 2021-01-01 东风汽车集团有限公司 Method and system for identifying clamping stagnation of accelerator pedal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160128040A (en) 2015-04-28 2016-11-07 대동공업주식회사 Operating Method of Pedals Systems for Tractor
CN112158149A (en) * 2020-08-26 2021-01-01 东风汽车集团有限公司 Method and system for identifying clamping stagnation of accelerator pedal
CN112158149B (en) * 2020-08-26 2022-03-01 东风汽车集团有限公司 Accelerator pedal clamping stagnation identification method and accelerator pedal clamping stagnation identification system
CN112109648A (en) * 2020-09-30 2020-12-22 北京车和家信息技术有限公司 Method for detecting clamping stagnation of accelerator pedal and vehicle control unit

Similar Documents

Publication Publication Date Title
CN108284843B (en) Fault-tolerant automobile brake system
EP3498561B1 (en) Vehicle control device
US9688284B2 (en) Method and device for monitoring a drive of a motor vehicle
KR101407998B1 (en) Apparatus for sudden unintended acceleration prevention of vehicle and control method thereof
KR20170037528A (en) Method and device for operating a driving system for a motor vehicle using an acceleration monitoring
CN106476654B (en) A kind of failure self diagnosis and self-shield device with pedal and control method
US9818241B2 (en) Malfunction diagnosing apparatus for vehicle
US9233687B2 (en) Method and device for initiating an operation of a motor vehicle under emergency conditions
US9460628B2 (en) Method and device for preventing unintentional acceleration of a motor vehicle
CN108501950B (en) Vehicle power flow analysis to distinguish between internal faults and external forces
US20130332029A1 (en) Method and apparatus for controlling failure of motor-driven power steering system
US20130304310A1 (en) Fail-safe control system for vehicle
CN105620459A (en) Electric vehicle brake pedal diagnosing method and device
KR101328514B1 (en) Device for watching operate state and preventing sudden departure of vehicle
KR20130039082A (en) Method for diagnosis of a trouble of accelerator pedal sensor
JP2011032903A (en) Control device of vehicle
JP2009062998A (en) Vehicle control system
US10144303B2 (en) Monitoring device for a vehicle and method for monitoring a vehicle
KR102266048B1 (en) Emergency Braking System having self test function
KR100980933B1 (en) Vehicle Control Method After Vehicle Accident
US9020659B2 (en) Dynamometer vehicle operating mode control
US9205789B2 (en) Method for monitoring vehicle systems during maintenance work on the vehicle
US8983788B2 (en) System and method of measuring a sensor offset
KR20140089022A (en) Vehicle Black Box System for Monitoring Integrated Driving State and sudden unintended acceleration
AU2016202499A1 (en) Method and system for automatic park brake activation and deactivation

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application