| 摘要 |
<p>This reciprocating engine (1) is such that high-temperature high-pressure combustion gas (12) above a piston (2) is introduced during the initial period of an expansion step from a gas path hole (23) provided at the upper portion (22) on the thrust side (10) of a cylinder inner surface (8) to a gas chamber (4) formed by being enclosed by the cylinder inner surface (8) and the second land (7), second ring (6), and top ring (5) of the piston (2), and the piston (2) is supported from the thrust side (10) by means of the introduced high-temperature high-pressure combustion gas (12). In the gas chamber (4), a half ring (13) comprising a heat resistant metal plate having low thermal conductivity is inserted in a vertically mobile manner with a gap (20) in the vertical direction and in a state of capping the second land (7) from the thrust side (10), and moves vertically by means of the reciprocating motion of the piston (2).</p> |
