| 摘要 |
<P>PROBLEM TO BE SOLVED: To simplify the structure of an engine provided with a main drive piston, a working crankshaft and an active expansion chamber piston, and to maintain its advantage. <P>SOLUTION: The invention proposes an engine comprising a main drive piston 1 driving a crankshaft 5 and at least one active expansion chamber 13 of a variable volume allowing work to be produced and which is connected, by a passage 6, with the volume contained in a driving cylinder 2, characterized in that the passage 6 comprises a shutter 7 thus allowing the active expansion chamber to be isolated from or to be placed in contact with the dead volume, in such a manner that the engine works according to a four-phase thermodynamic cycle: an isothermal expansion phase without work; a transfer-slight expansion phase with work said to be quasi-isothermal; a polytropic expansion phase with work; and an exhaust phase at ambient pressure. <P>COPYRIGHT: (C)2013,JPO&INPIT |
