Abstract
An intelligent engine noise diagnostic system and the diagnostic method thereof are disclosed herein. A signal-receiving device is utilized to receive an engine signal, and a plurality of feature parameters can be extracted from the engine signal by a feature-extracting device. And then these feature parameters can be classified into one of a plurality of diagnostic results by an intelligent-classifying device. Finally, the diagnostic result is shown in an output device. These feature parameters aforementioned can be classified into three types: frequency-domain features, time-domain features, and statistical features, and multiple intelligent-classifying technologies can be utilized to effectively and automatically diagnose the fault type of the engine.