天然气发动机的精确点火优化控制策略研究  

Research on precise ignition optimization control strategy of natural gas engine

作　　者：邓君丽 DENG Junli(College of Informatics,Huazhong Agricultural University,Wuhan 430072,China)

机构地区：[1]华中农业大学信息学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2021年第4期369-374,共6页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:51176136)。

摘　　要：对于凸轮齿数较少的天然气发动机而言,存在难以准确定位最佳点火时刻的问题,这一现象在发动机加速和减速时尤为明显。针对这一问题,用飞轮转速的加速度修正点火时刻能够更加精确地计算出各缸点火时刻距离凸轮齿的时间间隔。通过在吉利4G18台架上进行实验,证明此方法可以准确定位点火时刻,使实际点火提前角与设定的最佳点火提前角相同,提高发动机的运行效率和燃油经济性。For the natural gas engine with a small number of cam teeth,there is a problem that it is difficult to accurately locate the optimum ignition timing,which is particularly noticeable when the engine is accelerating or decelerating.In response to this problem,the acceleration of the flywheel speed is used to correct the ignition timing,and the time interval between the cam tooth and the ignition timing of each cylinder can be calculated accurately.Through experiments on the Geely 4 G18 gantry,it is proved that this method can accurately locate the ignition timing,make the actual ignition advance angle the same as the set optimal ignition advance angle,and improve the engine operating efficiency and fuel economy.

关 键 词：天然气发动机 点火系统 准确定位 转速加速度 最佳点火时刻 

分 类 号：TK432[动力工程及工程热物理—动力机械及工程]