The present invention is directed to three dimensional (3D) woven lattices for drag and turbulence reduction. 3D woven lattice material can serve as a surface layer that regularizes the flow around a bluff body with beneficial effects on: 1) drag reduction, 2) decrease in turbulence intensity, 3) attenuation of flow-induced vibrations, and 4) aerodynamic noise cancellation. 3-D woven lattice architectures allows for passive flow control (without the need for external energy supply) around bluff bodies with restricted geometry/shape due to their functional requirements such as wind turbine towers, cargo trucks, train cars, etc. The woven material can be easily shaped to fit on various geometries and incorporated in existing manufacturing processes (from composites to metallic plates). Metallic foam and randomly porous materials have been identified in the literature as a promising solution for passive flow control over bluff bodies.

The present disclosure is directed to a rotatable fairing panel at a rear end of a sleeper cab. The rotatable fairing panel covers an opening between a trailer attached to a vehicle and the sleeper cab of the vehicle. The rotatable fairing panel has a closed position and an opened position. At least one locking assembly locks the rotatable fairing panel in place when in the closed position. The at least one locking assembly is configured to be unlocked by a user such that the rotatable fairing panel may be rotated from the closed position to the opened position such that a user may access the opening between the trailer attached to the vehicle and the sleeper cab of the vehicle. The at least one locking assembly automatically locks when the user rotates the rotatable fairing panel into the closed position.

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 structural element (10) for forming a panel, with an upper plane (12) and lower plane (14) which are parallel and deformed along their plane at intervals by pods (16) which extrude toward the opposing plane with their internal faces mating to one another.

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.

An aerodynamic rear drag reduction system of the present disclosure is configured to be coupled to a rear frame assembly of a trailer including a rear frame and a rear swing door. The drag reduction system includes a side panel configured to be coupled to the rear swing door to extend generally vertically at least partially along a height of the trailer; and a folding mechanism coupled to the side panel. The folding mechanism moves the side panel between (i) a fully-deployed position wherein the side panel is configured to extend generally rearwardly away from the rear end of the trailer and (ii) a fully-stowed position wherein an inner surface of at least a portion of the side panel is configured to lie generally adjacent the rear swing door. The folding mechanism is configured to be coupled to a door locking mechanism of the trailer for movement therefrom.

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.

A vehicle system includes a vehicle, a server configured to store position information, and a skirt coupled to the vehicle. The skirt includes a graphical representation. A global positioning system (GPS) tracking device is coupled to the vehicle and is associated with the graphical representation. The GPS tracking device wirelessly is coupled to the server and includes an electronic processor and a memory. The electronic processor is configured to receive, via a GPS interface, a position of the graphical representation, and transmit, via a transceiver, the position of the graphical representation to the server. The position of the graphical representation is accessible via an application on a mobile device.

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.

One embodiment comprises a fairing assembly adapted to couple to a vehicle, the assembly comprising: a support arm mountable to a frame rail of a vehicle and a fairing adapter adapted to mount a fairing to the support arm. The fairing adapter is rotatably coupled to the support arm and is rotatable from a first orientation corresponding to an aerodynamic position to a second orientation corresponding to a first access position. The fairing adapter may also be rotatable to a third orientation corresponding to a second access position. The assembly further comprises a releasable lock to lock the fairing adapter in the first orientation and releasable to allow the fairing adapter to rotate to the second orientation or the third orientation.