基于特征参数识别技术的柴油机高压泵原位检测仪

In-situ test device for diesel engine based on technology of characteristic parameter identification

柴油机燃油系的工作特性参数与工作过程复杂,对其故障的准确监测和诊断比较困难。在分析其工作参数特点的基础上,选取燃油喷射过程中的供油提前角、喷油的启喷压力和喷油量作为状态监测参数,设计了信号的调理电路和上止点信号的抗干扰提取电路,利用软件进行信号的处理,实现了燃油系的工作状态监测与故障诊断。试用结果表明,该系统可以准确地监测和诊断柴油机燃油系的故障,具有广泛的应用前景。

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.