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Method and device for detecting vehicle failure

A technology of automobile faults and detection methods, applied in the field of automobiles, can solve problems such as inability to accurately locate faults and unfavorable maintenance work.

Active Publication Date: 2014-01-22
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present application provides an automobile fault detection method and device to solve the problem that the existing technology cannot accurately locate the fault and is not conducive to subsequent maintenance work

Method used

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  • Method and device for detecting vehicle failure
  • Method and device for detecting vehicle failure
  • Method and device for detecting vehicle failure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] figure 1 It is a flow chart of an automobile fault detection method disclosed in the embodiment of the present application.

[0074] Such as figure 1 As shown, the fault detection method disclosed in Embodiment 1 includes the following steps:

[0075] S101: collecting fault monitoring parameters of the vehicle;

[0076] The above fault monitoring parameters include engine speed, vehicle water temperature, driving speed or engine oil pressure, etc. By detecting and judging different fault monitoring parameters, different types of fault detection can be realized.

[0077] S102: judging whether the fault monitoring parameters meet a preset fault judging condition;

[0078] S103: When the fault monitoring parameter satisfies a preset fault judgment condition, determine the fault type, acquire, output, and save the operation state information for a preset period of time.

[0079] The running status information of the above preset period includes the engine speed, driving...

Embodiment 2

[0083] figure 2 It is a flow chart of an automobile fault detection method disclosed in Embodiment 2 of the present application.

[0084] Such as figure 2 As shown, the automobile fault detection method disclosed in the second embodiment includes the following steps:

[0085] S201: Periodically collect the engine speed of the vehicle;

[0086] The acquisition method is periodic sampling, and the sampling period is preferably 100 milliseconds.

[0087] S202: Determine whether the engine speed meets the first speed failure judgment condition or the second speed failure judgment condition;

[0088] The first speed failure judgment condition includes: the actual speed drop value of the engine speed is greater than the preset speed drop value in two consecutive sampling periods, and the engine speed is less than Preset minimum speed.

[0089] The actual speed drop value mentioned here refers to the decrease value of the engine speed per unit time when the engine is running, ...

Embodiment 3

[0102] image 3 It is a flow chart of an automobile fault detection method disclosed in Embodiment 3 of the present application.

[0103] Such as image 3 As shown, the automobile fault detection method disclosed in the third embodiment includes the following steps:

[0104] S301: Periodically collect vehicle water temperature and engine speed;

[0105] The acquisition method is periodic sampling, and the sampling period is preferably 100 milliseconds.

[0106] S302: judging whether the vehicle water temperature and engine speed meet the preset water temperature fault judging conditions;

[0107] The conditions for judging a water temperature fault include: within n consecutive sampling periods, the vehicle's water temperature is higher than a preset water temperature, and the engine speed is higher than a second preset maximum speed, where n is a positive integer.

[0108] S303: When the vehicle water temperature and engine speed meet the water temperature fault judging c...

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PUM

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Abstract

The invention discloses a method and a device for detecting a vehicle failure. Whether a failure monitoring parameter satisfies a preset failure judging condition or not is judged by acquiring the failure monitoring parameter of a vehicle, a failure type is determined when the failure monitoring parameter satisfies the preset failure judging condition, and the running state information within a preset time interval is acquired, output and stored, wherein the failure monitoring parameter comprises one of engine rotation speed, vehicle water temperature, travelling speed and engine oil pressure. By the technical scheme, the corresponding failure type can be determined when a failure takes place, i.e. when the failure monitoring parameter satisfies the preset failure judging condition, and the running state information within the related time interval is output and stored, so that related equipment or technical staff can accurately position a failure by analyzing the running state information, the corresponding measure can be quickly taken to remove the failure, and the problems of the prior art are solved.

Description

technical field [0001] The present application relates to the technical field of automobiles, and more specifically, to a method and device for detecting automobile faults. Background technique [0002] The automotive Internet of Things system refers to the collection, storage and transmission of all working conditions and static and dynamic information of the car by installing on-board terminal equipment on the car. [0003] At present, the ECU (Electronic Control Unit, electronic control unit) on the car generally has a diagnosis function, and when the car fails, it generates and stores a fault code representing the type of fault. In order to find out the location and cause of the fault, the diagnostic instrument can be further used to read the fault codes and key parameters stored in the ECU through the vehicle bus (Lin bus, CAN bus, etc.), and use this as a basis to diagnose the car. However, this diagnostic method can only obtain what kind of fault has occurred in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 李娟勾晓菲
Owner BEIJING JINGWEI HIRAIN TECH CO INC
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