Analysis on a Certain Engine FEAD Belt Vibration

Xianfa Xu*, Min Yao, Duantao Wang

Engine Research Institute, Weichai Power Co., Ltd, Weifang, 261061, China

Abstract: The engine FEAD (Front End Accessory Drive) outputs the power and torque of the crankshaft to the front-end accessories such as water pump and generator through belt drive. With the development of economy and society, the customer pays more attention to comfort and subjective feelings, and has more strict requirements on the reliability and noise of the FEAD of the engine. The abnormal vibration and noise of the belt seriously affect the reliability of the engine and the subjective feeling of the audience. Therefore, a method to solve the vibration of the FEAD belt of the engine is analyzed. By appropriately reducing the connection stiffness between the crankshaft pulley and the crankshaft, the speed fluctuation, ｌｏａｄ fluctuation and crankshaft speed fluctuation of each accessory pulley of the FEAD are buffered and isolated through the elastic connection between the crankshaft pulley and the crankshaft. The test shows that this method can greatly reduce ｏｒ eliminate belt vibration and abnormal noise, improve durability life, eliminate belt falling off caused by belt vibration, and improve engine reliability and audience's subjective feeling.

Keywords: Engine; Front end accessory drive; Belt vibration; Abnormal sound