By added the servo motor, the simulation is realized, and the dynamic analysis is reported, thereby the velocity and acceleration of piston in normal power export state is acquired.

并对正常功率输出状态下曲柄活塞机构的运动进行了动力学分析，得出了活塞的速度和加速度分布。

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The piston transverse acceleration peak value is raised by 38%, which brings (about) stronger shock to cylinder.

活塞横向运动加速度的峰值增加了38%，加剧了活塞对气缸的冲击。

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It has also been clear that the source of piston knock noise is the impact between piston and cylinder sleeve by the vibration acceleration of the engine's body surface.

又通过发动机机体表面振动加速度，确定活塞敲击噪声产生的根源在于活塞与缸套的碰撞冲击。

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