Cooling air controlling device for a cooling module of a vehicle

The device has a lower plate (12) placed in horizontal position under a cooling module (10) of a vehicle. The lower plate has two openings that are placed upstream and downstream of the cooling module, respectively and are controlled by respective flaps under action of a control mechanism. The mechanism regulates rate of cooling air-flow discharged at exterior of the vehicle and crossing the cooling module. An independent claim is also included for a motor vehicle.