An
airflow control device comprises a body and an active material in operative communication with the body. The active material, such as shape memory material, is operative to change at least one attribute in response to an activation
signal. The active material can change its shape, dimensions and / or stiffness producing a change in at least one feature of the
airflow control device such as shape, dimension, location, orientation, and / or stiffness to control vehicle
airflow to better suit changes in driving conditions such as weather, ground clearance and speed, while reducing maintenance and the level of failure
modes. As such, the device reduces vehicle damage due to inadequate ground clearance, while increasing vehicle stability and fuel economy. An activation device, controller and sensors may be employed to further control the change in at least one feature of the airflow control device such as shape, dimension, location, orientation, and / or stiffness of the device. A method for controlling vehicle airflow selectively introduces an activation
signal to initiate a change of at least one feature of the device that can be reversed upon
discontinuation of the activation
signal.