本文介绍了单缸电力约束活塞发动机的结构及工作机理，并对其空载特性进行了理论和试验研究。

This paper introduced the construction and working principle of Single-cylinder Electric Power Confined Piston Engine, and studied the No-load characteristic on theory and experiment.

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本文分析了液压约束活塞发动机的结构原理和力学模型，简要介绍了ANSYS的尺寸优化理论。

This paper analyzed the structural theory and the mechanical model of hydraulic piston engine, and briefly introduced the optimization theory of ANSYS.

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本文的研究结果为凸轮活塞发动机的设计和改进提供了重要的参考依据，也为新产品的开发提供了有效的方法与经验。

The result of the study provided important reference to the design and improvement of CAM piston engine, and effective method and experience for new production.

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That's going to drive the wheels.

这是发动机的活塞。

麻省理工公开课 - 热力学与动力学课程节选