Automobile fault diagnosis method and device

A technology for vehicle faults and diagnosis methods, applied in electric vehicles, electrical devices, transportation and packaging, etc., can solve the problems of large size, inability to satisfy users' ability to know the working conditions of vehicles at any time, and inconvenience to carry.

Inactive Publication Date: 2012-01-25
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the maintenance and inspection of automobiles requires the use of professional equipment and the operation of professionals to read the fault codes, and these professional equipment are large in size and not easy to carry
Therefore, it is impossible to meet the needs of the user to know the working condition of the vehicle at any time.

Method used

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  • Automobile fault diagnosis method and device
  • Automobile fault diagnosis method and device
  • Automobile fault diagnosis method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 of the present invention proposes a kind of automobile fault diagnosis method, and this method is carried out by automobile fault diagnosis device, and its flow process is as follows figure 1 shown, including:

[0046] Step 101: sending a diagnosis request command to each electronic equipment unit of the car;

[0047] Step 102: Receive and save the diagnostic information returned by each electronic equipment unit, the diagnostic information includes a fault code;

[0048] Step 103: Find the fault description corresponding to the fault code from the diagnostic information;

[0049] Step 104: Display the fault description.

[0050] In the embodiment of the present invention, the query and extraction of the fault codes of the electronic equipment units are completed in the car, and the fault description corresponding to the fault codes is displayed on the screen of the vehicle, so that the user can know the vehicle at any time without driving the vehicle to ...

Embodiment 2

[0052] Embodiment 2 of the present invention proposes a car fault diagnosis method, which is executed by a car fault diagnosis device. This embodiment takes a car audio system as an example, and its flow is as follows figure 2 shown, including:

[0053] Step 201: The car audio system receives request information for reading fault codes sent by the user.

[0054] Specifically, after the car is ignited and started, the user sends request information for diagnosing vehicle faults to the car audio system through the command button for diagnosing vehicle faults of the car audio system.

[0055] Step 202: The car audio system sends a diagnosis request command to each electronic equipment unit.

[0056] Specifically, the car audio system sends a diagnostic request instruction to read the fault code through the status to the CANBUS (Controller Area Network BUS, controller area network bus) after receiving the request information for diagnosing the vehicle fault sent by the user. Th...

Embodiment 3

[0075] Embodiment 3 of the present invention proposes a kind of automobile fault diagnosis device, its structure is as follows image 3 shown, including:

[0076] The sending module 301 is configured to send a diagnosis request command to each electronic equipment unit of the car.

[0077] The sending module 301 is specifically used for:

[0078] The header field of the diagnosis request command is $7DF, which is used for the electronic equipment unit to obtain the fault code.

[0079] Send diagnostic request commands to each electronic equipment unit of the car through the controller area network bus.

[0080] The receiving module 302 is configured to receive and save the diagnostic information returned by each electronic equipment unit, the diagnostic information includes a fault code.

[0081] The receiving module 302 includes:

[0082] The receiving unit 3021 is configured to receive the diagnostic information returned by each electronic equipment unit, and the diagnos...

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PUM

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Abstract

The invention provides an automobile fault diagnosis method and a device, which belong to the field of automobile automatic control. The method provided by the embodiment of the invention comprises the following steps of: sending diagnosis request instructions to each electronic equipment unit of an automobile; receiving and storing diagnosis information returned by each electronic equipment unit, wherein the diagnosis information includes fault codes; finding fault description corresponding to the fault codes from the diagnosis information; and displaying the fault description. In the embodiment of the invention, the inquiry and the extraction on the fault codes of the electronic equipment units are completed in the automobile, and in addition, the fault description corresponding to the fault codes is displayed through a vehicle-mounted screen, so users can know the vehicle work conditions at any time without driving the vehicle to a service factory.

Description

technical field [0001] The invention relates to the field of automatic control of automobiles, in particular to an automobile fault diagnosis method and device. Background technique [0002] With the development of the automobile industry, in order to continuously improve the user's requirements for the comfort and safety of automobile driving, automobile manufacturers have adopted a large number of ECUs (Electronic Control Units, electronic control units), and these ECUs are inevitably There will be various failures. At present, the repair and maintenance of automobiles is no longer a simple mechanical operation, but an automatic electronic control technology that relies more and more on electronic and computerized professional tools. [0003] Modern automobile maintenance adopts the diagnostic technology with electromechanical system diagnosis as the core, and most electronic control equipment has the function of fault self-diagnosis. The self-diagnosis system can continu...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60R16/02
Inventor 姚伟萍赵国鹏俞双剑
Owner CHERY AUTOMOBILE CO LTD
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