Cooling device for liquid-cooled internal combustion engine of motor vehicle, has servo valve which controls coolant flow rate in balancing circuit based on foam and blister portion to reduce flow rate with less foam and blister portion

摘要

The device has a coolant balancing circuit which is connected with a cooling circuit. A sensor (22) meteorologically acquires the foam and blister portion in the coolant. A servo valve (26) controls coolant flow rate in the balancing circuit depending on the determined foam and blister portion such that the coolant flow rate in the balancing circuit is reduced with a collection of a reduced foam and blister portion.