Unlock instant, AI-driven research and patent intelligence for your innovation.

A Diagnosis Method for Brake Pedal Position Sensor Faults

A sensor failure and brake pedal technology, applied in the field of new energy vehicle power system failure diagnosis, can solve safety problems and other problems, and achieve the effect of ensuring safety

Active Publication Date: 2016-12-28
SAIC MOTOR
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the sensor is stuck, that is, the output voltage signal does not change with the change of the pedal stroke, it will inevitably cause serious safety problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Diagnosis Method for Brake Pedal Position Sensor Faults
  • A Diagnosis Method for Brake Pedal Position Sensor Faults

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Introduced below are some of the various embodiments of the invention, intended to provide a basic understanding of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of protection.

[0026] figure 1 It is a diagram showing the relationship between the brake position sensor signal in normal state and the brake position sensor signal and stop lamp switch signal in fault state.

[0027] In the present invention, the signal of the brake light switch is used as the reference signal, and the moving average value of the brake pedal position sensor is respectively recorded when the brake light switch is off and on. If the two averages are very close, it is considered possible that the sensor is stuck. When the above situation occurs for a certain number of times, it can be determined that there is a sensor stuck fault.

[0028] figure 2 It is a flowchart showing the diagnosis method of brake pedal position sen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a diagnostic method of a fault of a brake pedal position sensor. The diagnostic method includes regarding a stop lamp switch signal as a reference signal, and collecting a first moving average value of the brake pedal position sensor in the case that the stop lamp switch turns off and a second moving average value of the brake pedal position sensor in the case that the stop lamp switch turns on; judging whether or not a difference value of the first moving average value and the second moving average value is smaller than a first preset threshold value, if so, the fault is judged; if not, fault times is cleared; judging whether or not the accumulated fault times is not smaller than a second preset threshold value, if so, the brake pedal position sensor fault is judged. In this way, the brake pedal position sensor fault is detected, and the driver is notified accurately and timely.

Description

technical field [0001] The invention relates to the field of fault diagnosis of a power system of a new energy vehicle, in particular to a method for diagnosing a stuck brake pedal position sensor. Background technique [0002] In the existing technology, as the international attention to energy security and environmental protection issues continues to increase, countries have increasingly stringent requirements on pollutants emitted by vehicles. Reducing dependence on energy and realizing energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of the world economy. Hybrid vehicles and pure electric vehicles have become the development trend of today's automobile industry. [0003] In the field of hybrid electric vehicles and pure electric vehicles, the brake pedal position sensor converts the stroke of the pedal into a voltage signal output, which affects the torque demand of the vehicle, regenerative braking and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/22
CPCB60T17/22
Inventor 邓晓光孙俊陈婷张吉军姜丰伟
Owner SAIC MOTOR