Daifuku Co., Ltd.

Ziye Li

Toshihiko Kato

Sadao Akishita

A failure diagnosis system for automobile engines comprises an inverter motor (6) connected to a rotary shaft of an engine to be measured (2) and intended to rotate the engine (2), a microphone (8) for detecting an engine sound of the engine to be measured (2), a digital tape recorder for recording therein the engine sound detected by the microphone and an engine failure detector for extracting characteristics of the engine sound from the engine sound recorded in the recorder by a wavelet transform so as to detect a failure of the engine by the characteristics of the engine sound.

Growing community of inventors

Joetsu, Japan

Ziye Li