发动机电控系统的检修-车辆工程系.doc

发动机电控系统的检修-车辆工程系-毕业论文 Abstract With the rapid development of automobile industry, the automobile electronic control system integration degree is more and more high, in order to comprehensively and systematically understand the principle and repair of engine electronic control system, master the repair process, the relevant technical personnel completely and systematically. This topic is discussed the electronic control system of engine test and fault diagnosis knowledge, introduces the control system of automobile engine overview and basic knowledge of engine electronic control system fault diagnosis, engine electronic equipment fault diagnosis, the electronic control system of engine electronic control system of engine maintenance and common breakdown maintenance. In the engine control system were introduced an overview of electronic ignition device ESA , electronic fuel injection system EFI , exhaust gas recirculation control EGR , idle speed control ISC , valve timing control, the two air injection, oil gas evaporation control, and discusses their composition, working principle and effect. In the fault diagnosis of electronic control system of basic knowledge is introduced the matters needing attention, commonly used diagnostic tools and instruments, fault diagnosis and maintenance of the general procedure and basic method. In electronic equipment fault diagnosis chapters car lines and electronic equipment characteristics and circuit fault diagnosis and inspection points. Lists some common repair case, discusses the fault Automotive electronic control system characteristics, mainly reflected in the function of intensive, control electronics and connection standard, in the analysis of electric control system failure, you must know the electrical, electronic equipment structure, function and characteristics of the control system, composition, function and working principle, and a variety of common failure phenomenon, causes a