使用火花塞光纤传感器对 BJ4 92 Q汽油机燃烧进行研究 ,同时应用压力传感器进行对比测试。发现在正常燃烧时 ,测得的光强和气缸压力间的曲轴转角和峰值都有良好的相关性 ,所测光信号曲线能够更准确地反映燃烧时间参数 ;爆震燃烧时 ,火花塞光纤传感器探测的光强急剧增大和高频波动可表明爆震发生和爆震强度。所研制的火花塞光纤传感器具有可行性 The ignition of BJ4 92 Q gasoline engine was studied using a spark plug fiber optic sensor, and a pressure sensor was used for comparison test. It is found that there is a good correlation between the measured crank angle and the peak value of the light intensity and the cylinder pressure during normal combustion. The measured optical signal curve can more accurately reflect the combustion time parameter. When the knocking combustion occurs, the spark plug optical fiber sensor detects The sharp increase in light intensity and high frequency fluctuations can indicate knock detonation and knock intensity. The developed spark plug optical fiber sensor is feasible