Cooling system provided with intercooler and control method thereof

Abstract

A cooling system may include an intercooler configured to heat-exchange a coolant and air, a radiator configured to cool a coolant heated in an engine through heat-exchange with air, a low temperature radiator configured to cool the coolant of the intercooler, a thermostat selectively fluid-connected to the radiator or the intercooler to supply the coolant from the radiator or the intercooler to the engine, a first control valve configured to selectively supply the coolant which has passed through the intercooler to the radiator, a second control valve configured to selectively supply the coolant which has passed through the engine to the intercooler or the first control valve, and a controller configured to control operations of the thermostat, the first control valve, and the second control valve according to a temperature of the coolant of the engine and a temperature of intake air.

1 - 6 . (canceled) 
     
     
         7 . A method for controlling a cooling system including an intercooler configured to heat-exchange a coolant and air and supply the heat-exchanged air to an engine, a radiator configured to cool the coolant heated in the engine through heat-exchange with air, and a low temperature radiator configured to cool the coolant of the intercooler and form a fluidically-closed circuit with the intercooler, the method comprising:
 determining whether the engine is in a warmed-up state on a basis of a coolant temperature of the engine; and   when the engine is determined to be not in a warmed-up state, controlling a flow of the coolant according to a first operation mode, and   wherein, in the first operation mode,   the coolant heated in the engine is supplied to the intercooler to heat air and supply the same to the engine, and the coolant which has passed through the intercooler is supplied back to the engine without going through the radiator or the low temperature radiator.   
     
     
         8 . The method of  claim 7 , further comprising:
 when the engine is determined to have been warmed up,   determining whether an intake temperature is higher than a target set temperature; and   when the intake temperature is lower than the target set temperature, controlling flow of the coolant according to a second operation mode,   wherein, in the second operation mode,   the coolant heated in the engine is supplied to the intercooler to heat air and supply the same to the engine, and the coolant which has passed through the intercooler is supplied back to the engine through the radiator, rather than through the low temperature radiator.   
     
     
         9 . The method of  claim 8 , further comprising,
 when it is determined that the intake temperature is higher than the target set temperature, controlling a flow of the coolant according to a third operation mode,   wherein, in the third operation mode,   the coolant heated in the engine is supplied back to the engine through the radiator, rather than through the intercooler, and the coolant circulating in a closed circuit between the intercooler and the low temperature radiator is heat-exchanged with air supplied to the engine.