CG类发动机以其性能稳定深受广大中国用户的喜爱,成为国内的主流机型。但在使用过程中存在配气机构噪音大的缺点,其主要表现在: 1.怠速时无明显异响,加速和回油时上摇臂出现非常大的“哒哒”敲击声,声音钝哑而坚实。 2.发动机发出像气门间隙过大那样的“哒哒”清脆撞击声。发动机在怠速时声音有节奏.中高速时声音杂乱。这类现象很容易被误认为是气门 CG class engine with its stable performance by the majority of Chinese users, has become the mainstream model. However, there is a shortcoming of large noise in the air distribution mechanism during use. The main features are as follows: 1. There is no obvious abnormal noise when idling, and a very large “rattling” percussion sound occurs on the rocking arm during acceleration and oil return, Blunt and dull sound. 2. The engine sounds like a valve clearance is too large, “da da” crisp crash sound. The engine has a rhythm of sound at idle speed and noise at high speed. Such phenomena can easily be mistaken for a valve