Compressed-air or gas and/or additional-energy engine having an active expansion chamber
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United States of America Patent
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Jun 5, 2012
Grant Date -
Mar 4, 2010
app pub date -
Sep 3, 2007
filing date -
Sep 5, 2006
priority date (Note) -
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Abstract
An engine supplied with compressed air includes a main drive piston (1) driving a crankshaft (5) and 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 the driving cylinder (2). The passage (6) includes 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 without work; * a transfer-slight expansion with work known as quasi-isothermal; * a polytropic expansion with work; * an exhaust at ambient pressure.
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