A rear spoiler device for a vehicle at least includes an air-guiding element (25) for lengthening the contour, in particular of a side surface (3) of the vehicle (1), in a travel position, and a displacement device for displacing the air-guiding element (25) between the travel position and a home position. A front end (54) of the air-guiding element (25) is provided for bearing against the side surface (3) of the vehicle (1) in the travel position. At least one sealing element (61) for sealingly bearing against the side surface (3) is provided on the front end (54) of the air-guiding element (25), and the displacement device is provided for pressing the sealing element (61) against the side surface (3) in the travel position.

An aerodynamically effective attachment part or spoiler extension is disclosed. The spoiler extension includes a guide arrangement having a first guide element formed between the spoiler extension and a base body of the spoiler arrangement. Transfer of the spoiler extension is guided from a release position, in which the spoiler extension is detachable from the base body, along at transfer direction into a locking position, in which the spoiler extension is secured on the base body. The spoiler extension includes a securing element able to secure the spoiler extension automatically on the base body of the spoiler arrangement in the locking position.

A motor vehicle includes a high-mounted brake light which is arranged on a rear part of the motor vehicle, and an energy source for making available energy for the motor vehicle. A charging plate is connected to the energy source, and the charging plate is arranged in a rear portion of the motor vehicle. The rear part is a wing of a spoiler, and a receiver coil is arranged in the rear part. The receiver coil can be coupled in a wireless fashion to the charging plate for contactless transfer of energy between the brake light and the energy source.

A semitrailer underbody screen and wheel-set fairing kit comprises several panels and fairings for retrofitting on conventional semitrailers. A sectioned panel like fish scales covers the dozens of transverse I-beam cross-members positioned underneath conventional enclosed trailer floors, and carries on down the length of the underbody. A v-hull air deflector is set just beneath these panel covers, ahead of the semitrailer's undercarriage, suspension and tandem rear axle wheels. Such v-hull air deflector splits and aerodynamically “flows” the air being pushed ahead outwards to the sides and around the wheels. The tandem rear axle wheels themselves are completely boxed inside full fenders that cowl over the front, sides, top, and rear. Removable access panels are provided on the outsides of the full fender units for wheel and tire maintenance. The result is significantly less wind drag and noise at highway cruising speeds. Less drag means better fuel economy for the tractor operator.

A method of increasing the performance of an aircraft, missile, munition or ground vehicle with plasma actuators, and more particularly of controlling fluid flow across their surfaces or other surfaces which would benefit from such a method, includes the design of an aerodynamic plasma actuator for the purpose of controlling airflow separation over a control surface of a aircraft, missile, or a ground vehicle, and a method of determining a modulation frequency for the plasma actuator for the purpose of fluid flow control over these vehicles. Various embodiments provide steps to increase the efficiency of aircraft, missiles, munitions and ground vehicles. The method of flow control reduces the power requirements of the aircraft, missile, munition or ground vehicle. These methods also provide alternative aerodynamic control using low-power hingeless plasma actuator devices.

A vehicle (1) includes at least one rear door (6, 8) with a rear spoiler device (14). The rear spoiler device includes an air deflector element (15, 25, 35, 45), which is adjustable between a basic position and a drive position for extending the contour and aerodynamic air deflection. The rear spoiler device further includes one support device (18, 28, 38, 48) for supporting the air deflector element (15, 25, 35, 45) in its drive position. The support device has a four-bar linkage (18, 28, 38, 48) with at least four joints or joint axes (A, B, C, D) for adjusting the air deflector element (15, 25, 35, 45) between the basic position and the drive position.

Various embodiments of an airfoil and machines with airfoils are disclosed. The airfoils include a thicker leading airfoil portion and a thinner trailing airfoil portion. In one embodiment, the leading airfoil portion is formed by bending a body of the airfoil back toward itself. In another embodiment, the leading airfoil portion has a solid geometry and includes two elliptic surfaces. To prevent detachment of airflow, the leading airfoil portion includes at least two arc portions or surfaces that act to direct the airflow down to the trailing airfoil portion in a manner that stabilizes vortexes that may form in the region of changing thickness.

An active spoiler system for a vehicle is disclosed that changes from a stowed position to a deployed position. In the stowed position, one or more flexible sheets are stored on rollers inside the body of the vehicle. The flexible sheets are pulled outward out of the body of the vehicle by a rigid bar that rotates around a pivot, in response to a controller. The deployed active spoiler may decrease drag thereby increasing fuel efficiency, while also allowing for the active spoiler to be stowed when not needed due to road or weather conditions.

A rear spoiler device (8) for a vehicle comprises an air-guiding element (9, 19), which can be moved between a retracted base position and a driving position and has a guiding surface (9d) for aerodynamically extending the contour of an exterior surface (4, 3) of the vehicle in the driving position. The air-guiding element (9) has a contact edge (9c) extending in a lateral direction (y) for contacting the exterior surface (4) of the vehicle (1) in the driving position, wherein the rear spoiler device (8) can be mounted completely on a rear door of the vehicle, the air-guiding element (9, 19) being designed in a multi-layer manner.

A transparent spoiler for a vehicle including a first section, at least a portion of the first section having a first visual characteristic, and a second section, at least a portion of the second section having a second visual characteristic, the second visual characteristic defining a greater visibility through the second section than the visibility through the first section.