Method of operating a valve apparatus for an internal combustion engine
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United States of America Patent
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Jan 25, 2011
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app pub date -
Dec 8, 2008
filing date -
Sep 23, 2005
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Abstract
A method includes operating an internal combustion engine according to a four-stroke combustion cycle. The four-stroke combustion cycle includes a combustion stroke, an exhaust stroke, an intake stroke and a compression stroke. A valve associated with a cylinder of the internal combustion engine is opened at a first time during the four-stroke combustion cycle. The valve is closed at a second time during the four-stroke combustion cycle. The valve is opened at a third time during the four-stroke combustion cycle. The valve is closed at a fourth time during the four-stroke combustion cycle.
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