| 摘要 |
<p>An engine piston for exerting maximum gas pressure with minimum expansion force comprises: a small, oval piston (10), a sleeve (30) separately movable over the piston within a piston cylinder (80), and two automatic clutches having each a spring-loaded latch (40) mounted in the sleeve, locking the piston normally, and a servo cam key (60) mounted in the piston for unlocking the piston in expansion strokes and locking the piston cylinder (80) momentarily so as to provide: the piston combined by the sleeve in compression strokes for reciprocating together to compress much gas; the piston detached from the sleeve in expansion strokes for dashing alone through a sleeve cylinder (39) to exert stronger pressure; and the piston re-combined in exhaust strokes for reciprocating together to exhaust the gas. The latch (40) has a sliding bar (49) with an internal bolt (50) to lock the piston normally and an external bolt (54) to lock the piston cylinder (80). The servo cam key has a piston rod (67) and mouth pieces (61) to unlock the latch (40).</p> |
