介绍了一种汽油机爆震自动控制系统 ,该系统将经过带通滤波后具有爆震频率特征的缸内压力波峰值作为衡量爆震强度的指标 ,通过实验判别爆震发生的门坎值 ,采用统计方法确定爆震强度 ,依靠控制点火提前角使发动机工作在轻微爆震状态 ,从而使其经济性和动力性得到提高 This paper introduces an automatic knocking control system of gasoline engine. The system takes the pressure peak value of in-cylinder pressure which has the characteristics of detonation frequency after band-pass filtering as the measure of knock strength, and determines the threshold value of detonation by experiments. Method to determine the knock strength, relying on the control of ignition advance angle so that the engine works in a slight detonation state, so that its economy and power is improved