活塞气缸拍击特性及其磨损间隙变化关系

以某发动机气缸-活塞组为例，模拟了发动机气缸-活塞组中活塞的二阶拍击运动，根据二阶运动参数的模拟结果预测了气缸-活塞组件表面的磨损状态及磨损间隙。在此基础上，分析了气缸-活塞组间的间隙变化对活塞二阶运动的影响,获得了不同气缸套活塞磨损间隙的变化情况下，活塞在气缸套里做二阶运动时各种动态参数的变化规律。分析结果表明，所提出的方法能够有效预测因内燃机缸套活塞磨损间隙变化所引起活塞拍击特性的变化规律。

Piston Slap Characteristics and Clearance Variation of Piston and Cylinder

The work state evaluation of the piston-cylinder group is significant for maintaining a good working condition and reducing the failure rate of the internal combustion engine. Taking an engine cylinder-piston group as an example, the piston slap motion in the cylinder is simulated. According to the simulated results of piston slap motion parameters, the surface wear state and wear clearance of the piston cylinder group are evaluated, and the influence of the cylinder-piston clearance variation on the piston slap motion characteristics is analyzed. In the end, the variation laws of different dynamic parameters of piston slap motion in the cylinder are obtained on the condition of different existing cylinder-piston wear clearance variation. The results also show that the proposed analysis method in this study can effectively predict the piston slap motion variation law caused by the wear clearance variation of the engine cylinder-piston group.