The present invention controls the cooling water circulating in the water jacket of the engine when starting the engine of the car to reduce the warm-up time until the coolant rises to a constant temperature when the engine is started in the cooling state, A coolant circulation control device for reducing the warm-up time during engine cooling that improves the combustion efficiency of an engine and ultimately reduces the incidence of unburned hydrocarbons in the exhaust gas. The cylinder head communicates with the water jacket of the cylinder block of the engine. A thermostat mounted in front of the discharge path of the coolant circulating through the water jacket, a throttle body and a heater for circulating the coolant through a supply line communicating with the coolant discharge path, and cooling the coolant by opening the thermostat And a water pump for pumping circulation of cooling water to the water jacket of the cylinder block. In the configured coolant circulation device, a thermocouple for sensing the coolant temperature around the combustion chamber in proximity to any one of the combustion chamber in the cylinder head, and receives the input signal of the thermocouple is mounted to the coolant discharge port to the water jacket of the engine A butterfly valve for controlling the discharged cooling water and a bypass line connected between the cooling water discharge port and the pumping circulation line of the water pump, and an excessive temperature change of the cooling water discharged at the opening of the butterfly valve mounted on the bypass line. It characterized in that it consists of a discharge coolant temperature control valve for bypassing the cooling water pumped into the pumping circulation line to the outlet to control the.
展开▼
