Cooling system for vehicle and control method therefor

Abstract

Disclosed are a cooling system for a vehicle and a control method for a cooling system. The cooling system may include an electric water pump configured to circulate coolant, an active air flap apparatus configured to actively control an air amount introduced into an engine room of the vehicle, a radiator configured to supply the coolant to an engine, a fan configured to cool the coolant of the radiator, and a control unit configured to control the electric water pump, the air flap apparatus, and the fan depending on a driving state and condition of the vehicle, in which the radiator is directly connected to the electric water pump without a thermostat or a control value being interposed between the radiator and the electric water pump.

What is claimed is: 
     
         1 . A cooling system for a vehicle, comprising:
 an electric water pump configured to circulate a coolant;   an air flap apparatus configured to actively control an air amount introduced into an engine room of the vehicle;   a radiator configured to supply the coolant to an engine;   a fan configured to cool the coolant of the radiator; and   a control unit configured to control the electric water pump, the air flap apparatus, and the fan depending on a driving state and condition of the vehicle,   wherein the radiator is directly connected to the electric water pump without a thermostat or a control value being interposed between the radiator and the electric water pump.   
     
     
         2 . The system of  claim 1 , wherein:
 the thermostat and/or the electronic control valve are removed from the vehicle to which the cooling system is applied.   
     
     
         3 . The system of  claim 1 , wherein:
 the control unit receives a signal associated with the air flap apparatus from an air flap control unit and receives a signal associated with the engine from an engine control unit (ECU).   
     
     
         4 . The system of  claim 3 , wherein:
 the control unit controls the air flap apparatus to control a cooling air amount passing through the radiator and controls the electric water pump to control a coolant flow rate to keep the coolant at a set coolant temperature.   
     
     
         5 . A control method for a cooling system for a vehicle in which an air flap apparatus is equipped and an electric water pump is directly connected to a radiator, the control method comprising:
 detecting an engine output, an engine speed, a vehicle speed, and/or a coolant temperature which correspond to a vehicle state;   controlling the air flap apparatus depending on the vehicle state;   controlling the electric water pump depending on the vehicle state; and   controlling a fan for cooling the coolant of the radiator of the cooling system depending on the vehicle state,   wherein the controlling of the air flap apparatus, the controlling of the electric water pump, and the controlling of the fan are integrally combined with each other to keep the coolant at a set temperature.   
     
     
         6 . The method of  claim 5 , wherein the controlling of the air flap apparatus includes:
 closing at least one stage of the air flap when the air flap is in a closing control condition; and   opening at least one stage of the air flap when the air flap is in an opening control condition.   
     
     
         7 . The method of  claim 5 , wherein the controlling of the electric water pump includes:
 controlling the electric water pump to a set speed based on an external temperature, the engine output, the vehicle speed, the coolant temperature, and/or an operation state of the air flap, when the electric water pump is in an operation condition.   
     
     
         8 . The method of  claim 5 , wherein the controlling of the fan includes:
 controlling the fan to a set speed based on an external temperature, the engine output, the vehicle speed, the coolant temperature, and/or operation states of the air flap and the electric water pump, when the fan is in an operation condition.   
     
     
         9 . The method of  claim 5 , wherein the controlling of the air flap apparatus includes:
 controlling opening and/or closing operations of the air flap based on an external temperature, the engine output, the vehicle speed, the coolant temperature, and/or operation states of the electric water pump and the fan, when the air flap apparatus is in an operation condition.