Due to the complexity of running characteristics and process fault of diesel combustion engine＇s fuel supply system, the monitoring and diagnosis of fuel supply system fault is difficult. On the basis of analysis of the principle and characteristics, selectiing the fuel supply advance angle of injection process, injection starting pressure and fuel charge as monitoring parameters, the conditioning circuit as well as anti-jamming extraction circuit of top dead point signal were designed. The acquired signal was analyzed by software program, therefore the monitoring and fault diagnosis of fuel supply system were realized. The experiment results show that the system can exactly monitor and diagnoze the fault of diesel engine, and has a wide application.
fuel supply system