应用 Windows下可视化的软件开发工具 Borland C++Builder和 BP网络设计电控柴油机故障诊断系统 .采用多线程技术将监控模块与故障诊断模块溶为一体 ,实现对电控柴油机的故障诊断 .系统性能台架实验结果表明 ,该方法能够对柴油机的常见故障进行诊断 ,工作可靠 ,在电控柴油机系统中运用神经网络进行故障诊断是可行的 The software of Borland C ++ Builder and BP network is applied to design the fault diagnosis system of electronically controlled diesel engine by using the visualized software development tool under Windows. The multistage technology is adopted to integrate the monitoring module and the fault diagnosis module to realize the fault diagnosis of the electronically controlled diesel engine. The bench test results show that this method can diagnose common faults of diesel engine and work reliably. It is feasible to use neural network to diagnose faults in electronically controlled diesel engine system