Start of an internal combustion engine with at least one engine valve in an open state during cranking
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United States of America Patent
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Aug 22, 2017
Grant Date -
Oct 6, 2016
app pub date -
Jun 16, 2016
filing date -
Dec 18, 2012
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Abstract
Start-up of an internal combustion engine comprises maintaining one or more engine valves in an engine cylinder in a continuously open state for more than one engine cycle during engine cranking. When it is determined that an engine parameter or transmission oil pressure has reached a predetermined value, maintenance of the one or more engine valves in the continuously open state is discontinued and fuel is subsequently provided to the engine cylinder for engine start-up. In various embodiments, the engine parameter may comprise an engine temperature parameter, an engine pressure parameter or an engine electrical parameter.
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