Research On The Automobile Fault Diagnosis Its Methods And Application Based On The Fuzzy Fault Tree

With the development of market economy and the increase of car ownership,resulting in vehicle inspection and maintenance in short supply,many car companies rushed to launch vehicle inspection and maintenance technology research,at present,mainly USES the vehicle diagnostics,fault diagnosis expert system,instrument equipment diagnosis and automobile fault diagnosis method based on numerical characteristics identification for automobile fault judgment.This paper briefly introduces the fault tree analysis,and expounds the common symbols of the fault tree,including the event symbol,the logic gate symbol and the transfer symbol.The fuzzy fault tree theory,including fuzzy tree theory,fuzzy fault tree model,and fuzzy operator of fault tree analysis are expounded.Analysis of common automobile failure,including system failure,fault of car chassis system and electrical system failure;The method of vehicle diagnosis based on fuzzy fault tree was expounded,including the quantitative analysis of fuzzy fault tree and the importance of fuzzy fault tree.BYD Qin for example,the key to the power system fault analysis and establish the fault tree,the power system fault tree system failure,the inverter system mainly includes the motor failure and battery failure;The fault diagnosis of the motor system,the inverter system and the battery system were respectively.Among them,the fault diagnosis of the motor system includes the establishment of the fault tree,the fault diagnosis strategy and the diagnosis of the diagnosis.In fault diagnosis of the inverter system mainly includes the work to build up the fault tree,the fault diagnosis results,battery fault diagnosis mainly includes the process of establishing the fault tree,the battery model fault diagnosis results,fault diagnosis strategy.Residual verification results show that since 0.51 s residual producer alarm threshold,and demonstrates that malfunctioned,integrated fault diagnosis results,have not found any misstatement of omission phenomenon,and all were found fault in a certain period of time were detected effectively,and in a timely manner,this paper is verified based on the fuzzy fault tree of the automobile fault diagnosis method is effective.