INTERNAL COMBUSTION ENGINE OPERATIONAL SYSTEMS AND METH0DS
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United States of America Patent
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Issued Date -
Sep 9, 2010
app pub date -
Aug 20, 2009
filing date -
Mar 4, 2009
priority date (Note) -
Abandoned
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Abstract
An internal combustion engine in which intake and exhaust valve timing is varied to improve cold-start performance and emissions and to increase cylinder-out temperatures under certain operating conditions. Valve timing is controlled to modify in-cylinder conditions to enhance certain physical and chemical processes. Valve timing is preferably determined based on measurement and calculation of engine operating parameters.
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