Cooling device for internal combustion engine and control method for cooling device
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United States of America Patent
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Nov 14, 2017
Issued Date -
N/A
app pub date -
Sep 29, 2014
filing date -
Mar 19, 2014
priority date (Note) -
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Abstract
The present invention relates to a cooling device and a control method therefor. This cooling device includes: a first cooling liquid line routed by way of a cylinder head and a radiator; a second cooling liquid line routed by way of a cylinder block while bypassing the radiator; a third cooling liquid line routed by way of the cylinder head and a heater core while bypassing the radiator; a flow rate control valve for distributing cooling water to the cooling liquid lines; and mechanical and electric water pumps. A control unit controls the flow rate control valve according to the temperatures of the cylinder head and block, during engine operation, and causes the electric water pump to operate while controlling the flow rate control valve according to the temperature of the cylinder head, and whether or not heat exchange in the heater core is requested, during temporary engine stop.
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