MODIFYING AERODYNAMIC PERFORMANCE OF A VEHICLE

摘要

A vehicle (1; 101) is provided comprising a deployable closure panel (3; 103) which, in a deployed position, closes an air inlet (5; 105) of a vehicle body so that one edge thereof aligns with one edge of the vehicle body. A method is also provided for moving the closure panel (3; 103) into one of the deployed position and a retracted position, based on the vehicle (1; 101) satisfying a criterion. A control system (50) is provided for controlling deployment of the deployable closure panel. The control system (50) is configured progressively to deploy the deployable closure panel from the retracted position to the deployed position in dependence on an operating parameter associated with the vehicle (1; 101) to increase airflow through a closed channel formed by an airflow modification device disposed transversely across a recessed channel formed in a bonnet extending towards a bonnet rear edge.