| 摘要 |
PROBLEM TO BE SOLVED: To achieve practical use of a quiet engine, having high thermal efficiency and explosive sound which is not accompanied with exhaust of combustion gas, by expanding energy of high-temperature and high-pressure combustion gas in a cylinder, until the pressure equals the atmospheric pressure and converting the energy into effective powder, in a reciprocating internal combustion engine. SOLUTION: A piston and a crankshaft are connected to each other by a connecting rod composed of two arms joined by a joint, and the joint part is moved circularly or linearly, to vary the stroke length of the reciprocating piston long and short every second time so that the volume in the cylinder in expansion and exhaust strokes is larger than that in intake and compression strokes.
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