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Method and device for diagnosing vehicle brake faults

A technology of vehicle braking and diagnosis method, applied in the direction of braking safety system, etc., can solve the problem of lack of effective diagnosis method of vehicle braking fault and so on

Active Publication Date: 2019-11-12
TIANJIN TRINOVA AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method and device for diagnosing vehicle brake faults, so as to alleviate the technical problem of lack of effective diagnostic methods for vehicle brake faults in the prior art

Method used

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  • Method and device for diagnosing vehicle brake faults
  • Method and device for diagnosing vehicle brake faults
  • Method and device for diagnosing vehicle brake faults

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Embodiment 1

[0072] A method for diagnosing a vehicle brake fault provided by an embodiment of the present invention, such as figure 1 shown, including:

[0073] Step S102, acquiring the wheel deceleration signal and braking signal of the vehicle to be diagnosed, wherein the braking signal includes at least one of the following: master cylinder pressure signal, pedal travel signal;

[0074] Step S104, according to the braking signal and the wheel deceleration signal, determine whether there is a braking failure in the vehicle to be diagnosed.

[0075] Specifically, the wheel deceleration signal carries information on the degree of wheel speed reduction, and the braking signal carries information on the braking degree of the vehicle's braking components. In view of the braking degree of the braking components in the braking system of each vehicle and the There is a preset correlation between the degree of wheel speed reduction, so through the obtained braking signal and wheel deceleration ...

Embodiment 2

[0123] An embodiment of the present invention provides a vehicle brake failure diagnosis device, such as Figure 5 shown, including:

[0124] The obtaining module 100 is used to obtain the wheel deceleration signal and the braking signal of the vehicle to be diagnosed, wherein the braking signal includes at least one of the following: master cylinder pressure signal, pedal travel signal;

[0125] The determining module 300 is configured to determine whether the vehicle to be diagnosed has a braking fault according to the braking signal and the wheel deceleration signal.

[0126] Specifically, the acquisition module 100 may include a wheel deceleration signal acquisition unit, a master cylinder pressure signal acquisition unit, and a pedal stroke signal acquisition unit. in,

[0127] The wheel deceleration signal acquisition unit is connected to the wheel speed sensor, and calculates the measured value of the wheel speed sensor by receiving the wheel speed signal collected by...

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Abstract

The invention provides a method and device for diagnosing a vehicle brake failure, and relates to the technical field of diagnosing of vehicle faults. The method comprises the following steps of obtaining a wheel deceleration signal and a brake signal of a vehicle to be diagnosed, wherein the brake signal comprises one or more of the following signals of a main cylinder pressure signal and a pedal stroke signal; and according to the brake signal and the wheel deceleration signal, determining whether a brake failure is generated in the vehicle to be diagnosed or not. Through the adoption of the method and the device disclosed by the invention, the technical problem that in the prior art, an effective diagnosing method of the vehicle brake failure is lacked is solved.

Description

technical field [0001] The invention relates to the technical field of vehicle fault diagnosis, in particular to a method and device for diagnosing a vehicle brake fault. Background technique [0002] Electronic Stability Control (ESC) is an active safety technology that assists the driver in controlling the vehicle. It can automatically correct the instability of the vehicle body and help prevent accidents. It is a new type of active safety technology for vehicles. security system. [0003] A master cylinder pressure sensor is installed in the ESC system to detect the pressure signal of the master cylinder in order to assist the ESC system in active braking control. However, factors such as unstable power supply of the sensor and the defect of the sensor itself often lead to pressure signal drift failures. In addition, the corrosion, vibration, collision, etc. caused by the external environment will cause the brake pipeline signal leakage failure. Both pressure signal dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/22
CPCB60T17/22
Inventor 赵洵李亮李晨风张哲俞伟
Owner TIANJIN TRINOVA AUTOMOTIVE TECH CO LTD