Internal combustion engine
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United States of America Patent
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Jul 14, 2009
Grant Date -
Feb 28, 2008
app pub date -
Apr 2, 2007
filing date -
Apr 18, 2006
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Abstract
An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engine can thus be run at higher revolutions per minute and produce more power. An internal sleeve valve is provided for space and other considerations. A combustion chamber size-varying mechanism allows for adjustment of the minimum size of an internal volume to increase efficiency at partial-power operation. Variable intake valve operation is used to control engine power.
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