做功冲程，指的是在发动机内部将燃料的内能转化为机械能的过程。不论是二冲程发动机还是四冲程发动机，都要经过进（扫）气、压缩、燃烧膨胀、排气四个工作过程，才能完成一个工作循环。
在这六个工作周期中，有四个周期包含了四种不同的做功冲程，但仅有一种做功冲程消耗燃油。
In the six work periods, four periods comprises four different working strokes, but only one working stroke consumes fuel.
本发明涉及带组合式热功转换过程的高效率热机，尤其是集成了多种做功冲程和多种工质的热机。
The invention relates to a high efficiency heat engine having combined heat-work conversion process, especially an heat engine integrated with multiple working strokes and multiple working media.
发动机完整的循环要求有活塞的四个冲程：进气、压缩、做功、排气。
The complete cycle of an engine requires four piston strokes: intake, compression power, and exhaust.
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