Importance

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Abstract

In the air conditioning system, when the opening and closing control of the grille shutter is performed during the heating operation using the heater core, the outside air temperature and the water temperature are detected, and when the outside air temperature is lower than the water temperature, the grille shutter is set to fully closed. When the outside air temperature is higher than the water temperature, the grille shutter is opened. At this time, the opening degree of the grille shutter is set in accordance with the outside air temperature, the temperature difference between the outside air temperature and the water temperature, and the vehicle speed. As a result, it is possible to suppress an increase in the air resistance in a state where the heat absorption effect from the outside air cannot be obtained, and thus it is possible to suppress the consumption of energy (power) in the vehicle.

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First Claim