Device and method for ram air treatment of a vehicle cooling system

A method for ram air treatment of a cooling system, the cooling system comprising:

• a fan shroud having an aperture and an opening, the opening being spaced apart from the aperture,
• a cooling fan comprising a ram air turbine disposed in the aperture of the fan shroud,
• a shutter mechanism movable between a closed position in which it closes the opening of the fan shroud, and an open position in which it opens the opening of the fan shroud to allow a ram air flow to pass through the opening,
• a velocity sensor configured to measure ram air flow velocity,
• a temperature sensor configured to measure ram air flow temperature, and
• an actuator configured to move the shutter mechanism between the closed position and the open position based on a measured ram air flow velocity and a measured ram air flow temperature,
• the method comprising:
• measuring ram air flow velocity via the velocity sensor,
• measuring ram air flow temperature via the temperature sensor,
• opening the shutter mechanism via the actuator, according to the measured ram air flow velocity and the measured ram air flow temperature,
• wherein opening the shutter mechanism is performed if the measured ram air flow velocity is greater than or equal to a velocity threshold and if the measured ram air flow temperature is greater than or equal to a temperature threshold, and
• wherein measuring ram air flow temperature is performed if the measured ram air flow velocity is greater than or equal to the velocity threshold.