| 摘要 |
An internal-combustion engine includes two combustion spaces for each cylinder. Each combustion space is separated from the cylinder space and has a valve to open and close a passage through which communication is established between the combustion space and the cylinder space. A complete cycle consist of eight strokes of a four-stroke type engine or four strokes of a two-stroke type engine. At the start of the first expansion stroke of the cycle, the valve of the first combustion space opens to release burnt fuel into the cylinder space to power the piston. The burnt fuel from the first combustion space is expelled and fresh air is admitted into the cylinder space as in conventional four-stroke and two-stroke engines. The fresh air is compressed into the first combustion space on the first compression stroke of the cycle, and the corresponding valve closes at the end of the compression stroke. During the period when communication is established between the first combustion space and the cylinder space, the passage to the second combustion space is closed and fuel is injected into the second combustion space, ignited and burnt. On the second expansion stroke, the valve of the second combustion space opens to establish communication between the sdecond combustion space and the cylinder space. During the period when communication is established between the second combustion space and the cylinder space, fuel is injected into the first combustion space, ignited, and burnt.
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