柴油机工作过程均匀性的相关分析监测

Equilibrium detecting of Engine Working Process Using Correlation Analysis Method

将信号分析技术应用于柴油机缸内工作过程均匀性的检测与诊断，对缸内气体压力的互相关函数、互功率谱密度函数、相干函数的特征及其与柴油机工作状态之间的关系进行了分析讨论。研究表明，利用相关分析方法来监测各缸工作过程的差异是可行的。

This paper investigates the equilibrium detecting of disel engine working process by using signal processing technique.Characteristics of cross correlation function,cross power density spectrum and coherence function between cylinder pressure signals are discussed.Relationships between these functions and engine working conditions are described.The results show that it is feasible to monitor the equilibrium of engine working process by means of correlation analysis.