COOLING DEVICE FOR VEHICLE

摘要

When the temperature of cooling water within an engine (1) becomes equal to or higher than a partially warmed-up determination value which is set to a temperature lower than a determination value for the completion of warm-up of the engine (1), an engine cooling control unit (11) opens a valve (7) to mix together cooling water in both cooling water circuits. Even if mixing of the cooling water having different temperatures increases and decreases the temperature of the cooling water within the engine (1), the increase and decrease in the temperature occur in a region of temperatures lower than the determination value for the completion of warm-up of the engine (1), and this avoids a situation in which control before the completion of warm-up and control after the completion of the warm-up are performed repeatedly and alternately. Accordingly, in mixing of cooling water circulating in a first cooling water circuit and cooling water circulating in a second cooling water circuit, control on the basis of the temperature of the cooling water within the engine (1) can be performed without any problem.