Hollow valve for internal combustion engine, and internal combustion engine having the hollow valve
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United States of America Patent
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N/A
Issued Date -
Jan 22, 2009
app pub date -
Jul 2, 2008
filing date -
Jul 6, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a hollow valve for an internal combustion engine, including a stem portion, an umbrella portion provided at one end of the stem portion, a gastight cavity that communicates the interior of the stem portion with that of the umbrella portion, and a coolant contained in the cavity, the umbrella portion has a wall portion (a lower cap) having a combustion-chamber-side wall that forms a part of a wall of a combustion chamber of the engine, and a cavity-side wall that forms a part of a wall of the cavity, and at least one high-thermal-conductivity member is provided on the cavity-side wall, for conduction of heat between the wall portion and one of at least the coolant and the stem portion as a heat-conduction medium.
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