CONTROL METHOD OF ELECTRONIC CONTROL THERMOSTAT

摘要

A control method of an electronic control thermostat in which cooling water temperature control is performed appropriately and efficiently depending on the load of an automobile engine with high response and stability while preventing occurrence of overshoot or hunting in order to enhance fuel consumption of an automobile furthermore. Cooling water temperature of the engine is controlled from a first set temperature high temperature to a second lower set temperature low temperature or vice versa by predicting the heat radiation of a radiator when the cooling water temperature is settled at the low or high set temperature without detecting the cooling water temperature in order to prevent occurrence of hunting, and then controlling the electronic control thermostat depending on the predicted value. Heating correction of the engine, rotation-speed. correction of a water pump, outlet side water temperature correction of the radiator, and nonlinearity correction of a valve are performed even during cooling water temperature control.