应用于发动机正时系统的偏心轮技术

Eccentric Sprocket Technology applied to Engine Timing System

论述有效降低正时传动系统振动的偏心轮技术,把发动机曲轴带轮设计成偏心轮,通过正时皮带在凸轮轴上形成周期性的反向校正力矩,来减少或抵消凸轮轴的波动力矩,降低凸轮轴角振动对正时传动系统的激励,从而减少正时传动系统振动,改善发动机的噪声、振动与声振粗糙度(noise、vibration、harshness,NVH)性能,经过试验验证了偏心轮技术可有效降低正时传动系统的振动,改善发动机NVH性能。

This paper discusses an effective eccentric sprocket technology that can reduce the vibration of timing belt system.The belt wheel of engine crankshaft is designed into the eccentric sprocket,and a periodic reverse correction torque on the camshaft is formed by the timing belt to decrease or offset the fluctuation torque of the camshaft and reduce the excitation of the camshaft angle vibration to the timing transmission system and also reduce the vibration of the timing transmission system.By improving the NVH(noise,vibration,harshness)performance of the engine,it is proved that the eccentric sprocket technology can effectively reduce the vibration of the timing transmission system and improve the engine NVH performance.