Study on Integration Diagnosis System for Automobile Faults and Its Key Technologies

With the rapid development of automobile electronics level, the mechatronics of automobile product becomes more and more obviously. When we try our best to improve function of automobile by electronic controlled system, the difficulty of failure diagnosis is increasing too. In order to improve the maintenance quality and efficiency, automobile manufacturer and maintenance server have established the integration diagnosis system on the basis of on-board diagnosis and off-board diagnosis. There are two types of automobile fault diagnosis integration system, primary integration system which composed of detection technology and expert system; higher integration which composed of detection technology, expert system and network communication. These two systems may be composed of the parameters measuring module, data fusion module, and fault diagnosis module, information obtaining module and network communication module. Based on the analysis of module functions, the reason and basis to some key technologies such as measuring apparatus or equipment communication standards, the available of fault diagnosis expert system, the multifunction inferring methods and fault diagnosis knowledge obtaining by network are presented in this paper.