Based on the processing at vibration signals of diesel cylinder head and by means of the power spectrum analysis with Euclidean distance distinguishing function,the valve train faults are diagnosed.

• 提出对柴油机气缸盖表面的振动信号进行处理,利用功率谱分析和欧几里德距离判别函数诊断气阀机构故障,并开发出了由工业控制计算机、数据采集板和软件所组成的柴油机气阀机构故障诊断系统。