Air flow valve system for a ventilation grille with discreet flap control

A method for controlling an air flow through a ventilation grille on a front side of a vehicle comprising the steps of: vehicle operating conditions are detected; a target percentage is calculated on air flow through the ventilation grating on the basis of the target operating conditions; Air flow valves for the ventilation grille the determined desired percentage of a predetermined time interval are long operated in an open position; and the air flow valve for the ventilation grille is actuated a remaining percentage of the predetermined time interval long in a closed position.