Apparatus and method for throttle valve heating control of exhaust gas recirculation (EGR) system for combustion engine

A throttle valve heating control method of an exhaust gas recirculation (EGR) system for a combustion engine, comprising:

• measuring an outside air temperature and comparing the outside air temperature with a first setting temperature when a vehicle is turned on;
• measuring a voltage of a battery of the vehicle and comparing the voltage with a setting voltage in response to determining that the outside air temperature is equal to or less than the first setting temperature;
• and
• controlling a heat source operation such that the voltage of the battery is selectively applied to a heat source installed inside a valve housing in response to determining that the outside air temperature is equal to or less than the first setting temperature and the voltage of the battery is equal to or less than the setting voltage,
• wherein the controlling of the heat source operation further comprises an outside air temperature re-comparison operation of comparing the outside air temperature with a second setting temperature when receiving the voltage of the battery, and performing control to maintain application of the voltage of the battery and to repeatedly perform the battery voltage comparison operation in response to determining that the outside air temperature is equal to or less than the second setting temperature, and wherein the second setting temperature is set to be higher than the first setting temperature.