摘要
大功率柴油发动机在非公路矿用车辆应用普遍,实现油门控制数字控制,即可节约燃料,又可提高工作效率。基于神经网略法搭建所研究的发动机数学模型,并在此模型基础上结合发动机电控系统的结构特点,建立系统的数学模型。在发动机电控冷却系统的基础上,搭建发动机性能监控系统,通过试验获得不同工况下基于动力性及经济性的最佳工作温度点。结合电控系统和发动机模型及其工作原理和诊断原则,在系统中采用增量式PID控制器,对油门控制策略进行研究,基于Simulink建立系统的数学模型,对发动机怠速、升温、熄火等工况进行分析。结果可知,发动机的控制精度可达±5 r/min;在自动怠速控制中可平均节油约3%;系统的响应可靠,可实现性强,可作为实际设计的参考。
High power diesel engine is widely used in the off highway vehicle, and it can save fuels and improve the working efficiency. Based on the neural network method, the mathematical model of the engine is built, and combining the structure characteristics of the engine electronic control system, the mathematical model of the system is built on the basis of the engine model. On the basis of the engine electrically controlled cooling system, the engine performance monitoring system is built, and the optimal operating temperature of the engine is obtained by testing under different working conditions. Combined with the electronic control system and the engine model and its working principle and diagnosis principle, the PID controller is adopted in the system, and the throttle control strategy is studied and designed. The mathematical model of the system is established based on Simulink. The results show that the control accuracy of the engine is 5 r/min; in the automatic idle speed control, the average saving fuel is about 3%; the response of the system is reliable and realizable, which can be used as a practical reference for the design of engine throttle control strategy.
作者
黄如君
张梅
陈玉群
肖良快
HUANG Ru-jun;ZHANG Mei;CHEN Yu-qun;XIAO Liang-kuai(Automotive Engineering College, Foshan Polytechnic, Foshan 528137, China)
出处
《控制工程》
CSCD
北大核心
2018年第5期784-790,共7页
Control Engineering of China
基金
广东省高等院校教改项目(GDGZQCJZW015)
关键词
柴油机
电控冷却系统
油门控制策略
算法
模型
Diesel engine
electrically controlled cooling system
throttle control strategy
algorithm
model
