Asymmetric compete expansion rotary engine cycle
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United States of America Patent
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Oct 18, 2005
Grant Date -
N/A
app pub date -
May 12, 2000
filing date -
May 13, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A thermodynamic cycle for an internal combustion rotary engine is disclosed which achieves high efficiency through an asymmetry between the volume of air charge before compression and the volume of expanded air at the completion of expansion. The expanded volume is ideally selected such that the pressure of the exhaust gases is near the ambient pressure of the intake air. Three embodiments of engines which utilize the cycle are disclosed, one with the major components operating in uniform circular motion, one which utilizes lobe valves, and one which utilizes three sets of lobe valves such that three charges of air at various stages in the cycle are in the engine, thus increasing the power density of the engine.
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