IN-VEHICLE COOLING SYSTEM AND METHOD FOR CONTROLLING THE SAME

Processing circuitry of an in-vehicle cooling system regulates the flow rate of the coolant passing through a radiator, thereby regulating the coolant temperature to a target coolant temperature. The processing circuitry sets the target coolant temperature to a specified standard target coolant temperature when the engine is not operating in a specified temperature increase permitting range, and sets the target coolant temperature to a high target coolant temperature, which is higher than the standard target coolant temperature, when the engine is operating in the temperature increase permitting range. The processing circuitry changes the target coolant temperature in the temperature increase permitting range to a temperature lower than the high target coolant temperature and higher than or equal to the standard target coolant temperature, when the hydraulic oil temperature is higher than or equal to a specified temperature increase suppressing temperature.