| 摘要 |
An internal combustion engine of the gasoline-burning variety has an essentially constant maximum displacement or volume. This requires compromises in design to achieve acceptable power output at full throttle and reasonable thermal efficiency at cruising power. It would be desirable to have an engine with differing displacements for those operating conditions. However, the mechanical constraints of a conventional engine do not easily permit of that possibility. It is also desirable to separate the process of generating expandable fluid for an engine and the expansion of such fluid. This permits each of the two processes to be more closely optimized. Compression of fluid can be more nearly isothermal, and expansion which approaches truly isentropic expansion may be provided. It would also be desirable to capture waste heat from the combustion products within the expandable fluid for enhancing thermal efficiency of an engine. It has been found possible to charge a cell or chamber with an expandable fluid in such a way that said fluid may be efficiently presented without appreciable pressure fluxuation to an accompanying cyclical expander. It has also been found possible to use such a cell or chamber as a means of creating a true constant-volume heat input process.
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