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

A method and device for quickly identifying diagnostic subjects on the CAN bus

A CAN bus and main body technology, applied in the field of vehicle controller diagnosis, can solve problems such as time-consuming, time-consuming and labor-intensive problems, and achieve the effects of good scalability, improved efficiency and accuracy

Active Publication Date: 2021-11-26
GUANGZHOU AUTOMOBILE GROUP CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method takes a lot of time to check. If it is an occasional situation, it may not appear after multiple checks.
Time-consuming

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 method and device for quickly identifying diagnostic subjects on the CAN bus
  • A method and device for quickly identifying diagnostic subjects on the CAN bus
  • A method and device for quickly identifying diagnostic subjects on the CAN bus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] For ease of understanding, at first introduce the CAN message format that the present invention relates to, as figure 2 As shown, a commonly used CAN message format is shown, where:

[0036] The leftmost "0.011730" column is the time stamp of this data record; the "1" to the right represents the device channel used, here represents channel 1; the "720" or "7A0" to the right represents the ID of the CAN bus ;The "Tx" and "Rx" to the right represent sending and receiving, Tx is sending, Rx is receiving; the d to the right has no special meaning; the "8" to the right is DLC (data length), if it is 8 , it means that there are 8 bytes in length, and the diagnostic message stipulates that this must be 8; the "0322 01 FF AA AA AA AA" to the right is the data bit...

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 discloses a method for quickly identifying diagnostic subjects on a CAN bus, which is used for identifying multiple diagnostic subjects connected to a CAN bus of an automobile. The request instruction includes the CAN ID and the content of the diagnostic message; the content of the diagnostic message is parsed, and when the CAN ID matches its own ID, the padding bit information in the content of the diagnostic message is obtained; determined according to the padding bit information Corresponding diagnosis body, wherein each filling bit information corresponds to a diagnosis body; after processing the diagnosis request command, the in-vehicle controller sends a diagnosis response message carrying the diagnosis body information to the CAN bus. The present invention also provides a corresponding device. By implementing the present invention, the diagnostic subject on the CAN bus can be quickly identified, the cost is low, and the expansibility is good.

Description

technical field [0001] The invention relates to the technical field of diagnosis of vehicle controllers, in particular to a method and device for quickly identifying a diagnosis subject on a CAN bus. Background technique [0002] With the development of automotive electronics, there are more and more ways to diagnose automobiles, especially the OBD (on-board self-diagnostic system) terminal in the aftermarket (such as one-button remote control window lift), which can also send diagnostic instructions to the entire vehicle. achieve the purpose of control. [0003] Such as figure 1 As shown, a schematic diagram of the connection of vehicle controllers in the prior art is shown; multiple vehicle controllers are connected through the CAN bus, wherein the controllers A to F are in-vehicle controllers, and the external diagnostic device M is external to the vehicle. diagnostic equipment. Among the controllers A to F, the controllers C and E are capable of diagnosing other contr...

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): G05B23/02
CPCG05B23/0213
Inventor 温小锋朱鹏波韦恩祥王宇王礼高德申
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD