Vibration Analysis of Gasoline Engine Faults

Vibration analysis of engine faults is an approach to diagnose the engine condition. This study presents a study of vibration analysis of the normal engine and the engine with three different fault conditions. The gasoline engine was selected in this study. The accelerometer has been used at the surface of the engine to measure the vibration in the form of acceleration for all possible directions. Three conditions of engine faults including the engine that is not smooth while idling, the engine that goes missing while idling and the engine that has no power are selected. Five vibration signal parameters including fundamental frequency, long term spectrum, energy, long term cepstrum and zero crossing rate, are computed from all databases. The significant differences between normal engine and the fault engines are concluded. It can be obviously seen that the signal parameters are able to discriminate all three conditions and the engine with normal condition.