基于缸内压力波检测的汽油机爆震控制系统

Experimental Study on a Knock Control System for Gasoline Engine Based on the Detection of Cylinder Pressure Wave

在一台单缸汽油机上对基于缸内压力波检测的爆震控制系统进行了实验研究。试验表明该系统能准确地检测到爆震信号 ,使发动机工作在轻微爆震状态 ,与通过机体振动频率检测的爆震控制系统相比 ,在不同的试验压缩比下 ,该控制系统均能较好地改善发动机的动力性能和经济性能。

The experimental studies of a knock control system for gasoline engines based on the detection of cylinder pressure wave were carried out on a single cylinder gasoline engine.The results show that the control system can achieve the accurate knock detection and control to make the engine work in the trace of knock level.Compared with the knock control system based on the detection of engine vibration frequency,the control system has a better ability to improve the power output and fuel economy of the engine with different compression ratios.