An air dam assembly includes, among other things, an air dam and at least one quick-release pin that secures the air dam to a vehicle structure. An air dam positioning method includes, among other things, when an air dam is in a first position, the step of coupling the air dam to a vehicle structure using at least one quick-release pin in an engaged position. The method further includes transitioning the at least one quick-release pin to a disengaged position, and then, when the quick-release pin is in the disengaged position, moving the air dam to a second position that is different than the first position. The method then, when the air dam is in the second position, includes coupling the air dam to the vehicle structure using the at least one quick-release pin.

Adjustment device for adjusting an air influencing element of a motor vehicle between at least a first position and a second position, comprising a driving unit for adjusting the air influencing element between at least the first position and the second position, provided with an input shaft and an output shaft which is at a distance from the axis of the input shaft, wherein the driving unit has a first part which is provided around the input shaft of the driving unit, and has a second part which is provided around the output shaft of the driving unit, wherein the adjustment device is furthermore provided with a failsafe mechanism, wherein the failsafe mechanism engages the first part of the driving unit.

Adjustment device for adjusting an air influencing element of a motor vehicle between at least a first position and a second position, comprising a driving unit for adjusting the air influencing element between at least the first position and the second position, provided with an input shaft and an output shaft which is at a distance from the axis of the input shaft, wherein the driving unit has a first part which is provided around the input shaft of the driving unit, and has a second part which is provided around the output shaft of the driving unit, wherein the adjustment device is furthermore provided with a failsafe mechanism, wherein the failsafe mechanism engages the first part of the driving unit.

A vehicle having a vehicle body including a front portion, an opposing rear end portion and an underbody portion configured to face a road surface; and an active diffuser assembly disposed on the underbody portion and configured to control ambient airflow passing under the vehicle body. The active diffuser assembly includes a fixed panel disposed on the vehicle underbody; a movable active panel disposed adjacent the fixed panel and configured for selective movement to be deployed away from the vehicle body and to be retracted toward the vehicle body for stowage; and an actuator configured to deploy and retract the movable active panel, the fixed panel and the movable active panel defining a continuous plane when the movable panel is in the stowed position.

A rear spoiler device for a motor vehicle contains an upper shell which has an air-guiding outer wall. The upper shell extends longitudinally from a leading edge to a trailing edge and has a central main part and two side parts. The side parts are oriented so as to be inclined relative to the main part and are integrally connected to the main part on a longitudinally extending folded edge. A carrier element is provided which is fastenable to the motor vehicle and which has at least one retaining tab for fastening the upper shell. It is provided that a fastening tab which protrudes in the direction of the retaining tab of the carrier element and which extends along the folded edge is arranged on the inner face of the upper shell remote from the air-guiding outer wall.

The invention comprises a method and apparatus for increasing fuel efficiency of a vehicle moving through air, comprising the steps of: carrying, by the vehicle, a tail cone in an undeployed state; deploying the tail cone on a back of the vehicle while the vehicle is in motion, the tail cone comprising a flexible material; and pressurizing, with the air, an interior space at least partially enclosed by the tail cone, the tail cone forming an aerodynamic feature extending at least fifteen inches behind the vehicle, where pressurizing transforms the tail cone from a flexible material to a static and compliant aerodynamic feature, which increases miles per gallon of the vehicle by at least ten percent at speeds in excess of fifty miles an hour through a reduction in drag force on the vehicle.

A vehicle aerodynamic cover includes an upper body portion, a lower body portion and a boundary. The upper body portion defines a top edge. The lower body portion extends downwardly from the upper body portion and defines a bottom edge. The upper body portion is inclined in an inboard direction relative to the lower body portion when the aerodynamic cover is in an installed state. The boundary connects the upper and lower body portions.

Aspects of the disclosure relate to a retractable under chassis fairing. In certain embodiments, the under chassis fairing includes a fairing body and at least one coupling. The fairing body includes a floor, front wall, and left and right sidewalls. The front wall extends from a front edge of the fairing body to the floor toward a back edge of the fairing body and is angled relative to the floor. The at coupling is configured to hang the fairing body from a chassis such that an upper edge of the left and right sidewalls is positioned at the same height as or higher than a lower edge of the vehicle. The coupling is configured to allow movement of the fairing body from a lowered position vertically toward the chassis upon contact with a road obstacle. The under chassis fairing improves aerodynamic performance while moving upon contact with road obstacles.

There is described a top fairing for a trailer adapted to decrease drag and manage water. The top fairing comprises a surface for guiding air thereover, comprising a leading flange; a leading surface having a leading radius, the leading surface being joined to the leading flange and extending in a rearward direction; and a tailing surface having a tailing radius, the tailing surface in continuity to the leading surface in the rearward direction. The top fairing comprises openings disposed in the leading flange for managing water through the leading flange.

A system for deploying D-pillar spoilers on a vehicle is described. The system includes a deployment control system including controller logic having at least one processor and a memory storing instructions for implementing deployment and retraction of D-pillar spoilers on a vehicle. The system also includes at least one vehicle sensor in communication with the deployment control system. The system further includes a motor in communication with the deployment control system. At least one D-pillar spoiler is connected to the motor through a linkage, where the motor is configured to rotate the linkage. The at least one D-pillar spoiler is folded along an underside of a rear upper spoiler of the vehicle in a retracted position and is rotated to a position extending between the rear upper spoiler of the vehicle and a D pillar of the vehicle in a deployed position.