COOLING DEVICE OF MULTI-CYLINDER ENGINE
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United States of America Patent
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Jun 11, 2015
app pub date -
Dec 2, 2014
filing date -
Dec 5, 2013
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Abstract
A cooling device of a multi-cylinder engine circulates a coolant from a water pump through water jackets of a cylinder head and a cylinder block. The cooling device includes a main jacket of the water jacket of the cylinder head, formed around combustion chambers, an exhaust jacket of the water jacket of the cylinder head, communicating to the main jacket and formed on an opposite side of exhaust ports to the combustion chambers, a circulation system for suppressing that the coolant flows through the main jacket in an engine cold start, by circulating the coolant through the water pump and the exhaust jacket, and a convection suppressor for suppressing that the coolant flows into the main jacket from the water jacket of the cylinder block in the engine cold start, by suppressing a convection of the coolant inside the water jacket of the cylinder block.
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