介绍了二冲程微型摆动式发动机的主要结构和工作原理，运用CFD软件对发动机燃烧室进行三维建模，耦合既定的正弦摆动规律对燃烧室的流场进行计算。分析了工作过程各个阶段的流场特征，并对不同摆动频率下燃烧室的平均压力和燃烧效率进行对比。结果表明，相同进气温度下，摆臂频率越低，燃烧效率越高且平均压力的峰值越大。

 Main structure and working processes of a two-stroke Micro Internal Combustion Swing Engine (MICSE) was introduced. A three-dimensional calculation model of the combustion chamber of the engine was established and fluid flow in the chamber was simulated coupled with sine swing using CFD software. Flow field characteristic of each process was analyzed. Mean pressure and combustion efficiency of different swing frequency was compared. The results indicate that the combustion efficiency and peak of mean pressure increases with decrease in frequency under the same inlet temperature.