SPLIT-CYCLE ENGINE WITH HIGH RESIDUAL EXPANSION RATIO
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United States of America Patent
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Issued Date -
Sep 15, 2011
app pub date -
Mar 14, 2011
filing date -
Mar 15, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An engine includes a rotatable crankshaft. A compression piston is slidably received within a compression cylinder and operatively connected to the crankshaft. An expansion piston is slidably received within an expansion cylinder and operatively connected to the crankshaft. A crossover passage interconnects the compression and expansion cylinders. The crossover passage includes a crossover expansion (XovrE) valve disposed therein. In an Engine Firing (EF) mode of the engine, the engine has a residual expansion ratio at XovrE valve closing of 10.0 to 1 or greater, and more preferably 15.7 to 1 or greater.
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