Vehicle-mounted diagnosis system

An on-board diagnostic system and external diagnostic technology, applied in the direction of data exchange, electrical testing/monitoring, and bus network through path configuration. Ease of development and extension

Active Publication Date: 2013-07-17
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the body controller is not only connected to the devices on the LIN bus, but also connected to many devices with complex functions and high real-time requirements through the CAN bus. The general on-board diagnosis is realized by using external diagnostic equipment to communicate with the body controller through the CAN bus. , cannot directly diagnose the equipment connected to the body controller through the LIN bus

Method used

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Examples

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Embodiment 1

[0025] Such as figure 1 As shown, the on-board diagnostic system of this embodiment includes an external diagnostic device, a vehicle body controller with a LIN gateway and a CAN gateway, the vehicle body controller is connected to a slave node device through a LIN bus, and the connection between the vehicle body controller and the external diagnostic device The key is that the external diagnostic equipment sends a CAN request message to the body controller through the CAN bus; after the body controller receives the CAN request message, it converts the CAN request message into a LIN request message and sends the To the slave node device of the LIN bus; the slave node device of the LIN bus sends a LIN response message to the body controller after receiving the LIN request message; after the body controller receives the LIN response message, it converts the LIN response message into CAN Reply telegram and send to external diagnostic equipment.

[0026] Specifically, the CAN req...

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PUM

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Abstract

The invention aims to provide a vehicle-mounted diagnosis system, which can diagnose faults of equipment which is connected with a vehicle body controller through an LIN bus. The vehicular diagnosis system of the invention comprises external diagnosis equipment and the vehicle body controller which has an LIN gateway and a CAN gateway, wherein the vehicle body controller communicates with secondary node equipment through the LIN bus; and the vehicle body controller communicates with the external diagnosis equipment through the CAN bus. The key points of the vehicle-mounted diagnosis system include: the external diagnosis equipment sends a CAN request message to the vehicle body controller through the CAN bus; the vehicle body controller receives the CAN request message, converts the CAN request message into an LIN request message and then sends the LIN request message to the secondary node equipment of the LIN bus; the LIN bus receives the LIN request message from the secondary node equipment and then sends an LIN response message to the vehicle body controller; and the vehicle body controller receives the LIN response message, converts the LIN response message to a CAN response message and then sends the CAN response message to the external diagnosis equipment.

Description

technical field [0001] The invention belongs to the technical field of on-board diagnosis of automobiles, and in particular relates to the application of CAN bus and LIN bus. Background technique [0002] Due to the high cost of the CAN bus, some controllers on the car currently have simple structures and functions, low real-time requirements, and cost-sensitive controllers all use LIN bus technology, such as reversing radar modules, window anti-pinch modules, door modules, lights, etc. control module, etc. However, the body controller is not only connected to the devices on the LIN bus, but also connected to many devices with complex functions and high real-time requirements through the CAN bus. The general on-board diagnosis is realized by using external diagnostic equipment to communicate with the body controller through the CAN bus. , it is impossible to directly diagnose the equipment connected to the body controller through the LIN bus. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02H04L12/40H04L12/66
Inventor 马蔚张家如李昌武
Owner CHERY AUTOMOBILE CO LTD
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