Comprehensive fault diagnosis auxiliary system and method based on central gateway

Abstract

The invention discloses a comprehensive fault diagnosis auxiliary system based on a central gateway. Its gateway controller judges the running state of the vehicle according to the vehicle hard line input signal and the external network command signal, and determines whether the running state of the vehicle satisfies the preset diagnosis condition, the gateway controller reads the fault diagnosis signals of the power domain controller and the body domain controller, and the gateway controller according to the fault diagnosis signal of the power domain controller and the fault diagnosis signal of the body domain controller according to the correspondence between the preset fault code and the fault result The relationship determines the vehicle failure judgment result; the gateway controller checks and confirms the vehicle braking system and parking system after the vehicle enters the auxiliary start mode. The present invention is based on the current vehicle function configuration and controller network layout design, fully utilizes the characteristics of the gateway controller as the hub of each controller, and realizes timely sharing of fault diagnosis information and analysis results after comprehensive diagnosis and processing of each controller.

Description

technical field [0001] The invention relates to the technical field of vehicle fault diagnosis, in particular to a comprehensive fault diagnosis auxiliary system and method based on a central gateway. Background technique [0002] With the continuous improvement of the national economy and the maturity of the automobile consumer market, automobiles have gradually become an indispensable commuting and transportation tool for people. The number of related controllers is also increasing, which leads to various failure phenomena and reasons. At this time, after-sales personnel cannot confirm the cause of the failure and troubleshoot it through the description of the phenomenon at the first time, so they cannot carry spare parts and effective equipment to the scene for processing. [0003] The traditional solution is to use the on-board diagnostic system to monitor the vehicle's operating conditions at any time for faults, and once there is a fault, it will immediately issue a wa...

AI Technical Summary

Problems solved by technology

After obtaining the fault information of the vehicle, the patent inquires the fault conditions to obtain the status information. This operation requires storing all fault diagnosis logic in a single controller, which requires very high hardware performance of the controller, resulting in very high vehicle costs. ;And the fault diagnosis is to give the fault code after judging according to the diagnostic conditions. Now there is great doubt about the significance of inferring the status information from the fault code and then informing the driver.

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