| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a reciprocating engine in which adherence and deposition of carbon are not produced in a gas chamber, even when the engine is operated for a long period, and introduction, holding, and discharge of high-pressure combustion gas to the gas chamber are repeated. <P>SOLUTION: The reciprocating engine 1 has a gas chamber 4 formed, surrounded by a top ring 5, second ring 6, and second land 7 of a piston 2, and an inner surface 8 of a cylinder. At the beginning of an expansion stroke, a high-pressure combustion gas 12 from above the piston 2 is introduced into the gas chamber from a gas passage hole 23 provided at the top 22 of a thrust side 10 of the inner surface 8 of the cylinder. The piston 2 is supported from the thrust side 10 by this introduced high-pressure combustion gas 12. A half-ring 13 is inserted into the gas chamber 4 so as to cover the second land 7 from the thrust side 10 and so as to move vertically with a gap 20 in a vertical direction, and vertically moves by the gap distance 20 with reciprocation of the piston 2, so that the inside of the gas chamber 4 is continually cleaned. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
