发动机曲轴是发动机中最重要的部件之一，它承受复杂、交变的冲击载荷，是发动机设计的重点和难点。

The crankshaft is one of the most important components of engine, it endures complex and alternate load and it is the key point and difficulty of the engine design.

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提出了交变流动热机的介观热力循环理论，系统地分析交变流动热机中关键部件的热力过程。

The thermodynamic processes of key elements used in cyclic flow engines are systematically analyzed and then Meso-scope thermodynamic theory for cyclic flow engines is proposed.

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