Cooling apparatus for internal combustion engine
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United States of America Patent
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Oct 8, 2013
Grant Date -
Oct 20, 2011
app pub date -
Nov 26, 2009
filing date -
Nov 26, 2009
priority date (Note) -
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Abstract
An object of the present invention is to ensure appropriate cooling amounts for two exhaust ports, respectively, in an internal combustion engine in which an exhaust port that communicates with an inlet of a turbine of a turbocharger and an exhaust port that does not communicate with the inlet of the turbine are formed in a cylinder head. A cooling apparatus for an internal combustion engine of the present invention has a first exhaust port and a second exhaust port formed in a cylinder head of the internal combustion engine. The first exhaust port communicates with an inlet of a turbine of the turbocharger. The second exhaust port does not communicate with the inlet of the turbine. Each cylinder of the internal combustion engine includes a first exhaust valve that communicates with the first exhaust port and a second exhaust valve that communicates with the second exhaust port. A first cooling water passage through which cooling water that cools the first exhaust port passes and a second cooling water passage through which cooling water that cools the second exhaust port passes are formed in the cylinder head.
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