根据大功率柴油机电液供油提前器的控制要求，进行了神经网络结构PID方法的应用研究。分析了电液供油提前器的工作特性和控制要求，引入神经网络结构PID方法，自动实现PID的参数整定，通过对供油提前角器的活塞位移闭环控制，提出了供油提前器的不灵敏角度补偿机械硬件误差，实现了对供油提前角的控制。进行Matlab/Simulin环境下的不同PID方法的仿真对比，神经网络结构PID控制效果明显优于普通PID．并在实验台架上进行了电液供油提前器的控制试验，电液供油提前器的控制精度为0.3(°)CA，响应时间在2s内。结果表明神经网络结构PID方法在电液供油提前器中应用的有效性。

To meet electronic control demand of electro-hydraulic injection timing actuator for heavy duty diesel engine, application of neural network structural PID (N-PID) in the actuator was devel?oped. Work character and control demand of the actuator were analyzed, method of neural network structural PID was introduced to perform coefficient tuning of PID automatically. Closed-Ioop control for piston displacement in the actuator was performed, an un-sensitive angle of the actuator was pre?sented to compensate errors of mechanical hardware and fulfill control for injection timing. Simulation comparison between N-PID and PID under Matlab/oimulink was made, control effect of N-PID was prior to that of general PID. The bench control test of the actuator was made, its control precision and maximum response time were 0.3 (°)CA and within 2 s respectively and control effect of N-PID was superior to that of PID. The simulated and tested results show that application oi N-PID method in the actuator is available.