Valve cooling device of internal combustion engine
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United States of America Patent
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Jul 9, 2013
Grant Date -
Jan 17, 2013
app pub date -
Jul 6, 2012
filing date -
Jul 13, 2011
priority date (Note) -
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Abstract
A valve cooling device of an internal combustion engine in which engine oil is circulated in a valve that faces a combustion chamber, the valve includes a valve umbrella portion and a valve stem. An inside of the valve stem is formed with an oil introduction channel and an oil lead-out channel, a jet portion that includes a jet oil passage coaxially disposed with the oil introduction channel is provided in the extended direction of the valve stem, and the engine oil is injected from an orifice provided on a tip portion of the jet oil passage to an inner portion of the oil introduction channel.
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