往复发动机的故障诊断是较困难和热点的研究问题。本文主要针对EQ6100发动机常见部件(活塞—缸套、气门、气门挺杆、连杆轴承、曲轴轴承、活塞销与衬套)磨损故障进行了振动测试研究。在EQ6100发动机预先模拟各种故障,然后测取了在不同参数条件下的故障信号,并用时域和频域分析法进行了分析比较。通过分析,得出了各种故障诊断的特征参数及实现的方法。 Reciprocating engine fault diagnosis is more difficult and hot research problem. This paper mainly focuses on the vibration test research of the wear components of the common parts (piston-cylinder liner, valve, valve lifter, connecting rod bearing, crankshaft bearing, piston pin and bushing) of EQ6100 engine. EQ6100 engine pre-simulation of various faults, and then measured under different parameters of the fault signal, and time-domain and frequency domain analysis were analyzed and compared. Through analyzing, the characteristic parameters of various fault diagnosis and the method of realization are obtained.