METHOD FOR CONTROLLING COOLING SYSTEM OF VEHICLE

摘要

PURPOSE: A method for controlling a cooling system of vehicles is provided to improve stack cooling efficiency by controlling the speed(RPM) of an electric water pump according to a slope variation of a sensing value of a temperature sensor. CONSTITUTION: A cooling system of vehicles includes: an electric water pump(12) connected to a cooling water outlet of a fuel cell stack; an radiator(16) in which an inlet is connected to the electric water pump while an outlet is connected to a cooling water inlet of the fuel cell stack. A method for controlling the cooling system comprises a step of allowing RPM of the electric water pump to be variable-controlled according to the change a slope variation of a sensing value measured in a temperature sensor(22) by installing the temperature sensor at an inlet or an outlet or both of cooling water of the fuel cell stack.