Abstract: The purpose of this device is to reduce the fuel consumption of heavy trucks by improving airflow past trailer axles. Rather than restrict airflow to the side of the vehicle, diffusers streamline its aerodynamic profile and allow air to flow smoothly beneath. A series of panels mounted to each axle of a truck and trailer forms a substantially continuous surface from the front to the rear axle, promoting laminar flow to the aft of the vehicle, minimizing the effect of suction drag.

Abstract: The purpose of this device is to reduce the fuel consumption of heavy trucks by improving airflow past trailer axles. Rather than restrict airflow to the side of the vehicle, diffusers streamline its aerodynamic profile and allow air to flow smoothly beneath. A series of panels mounted to each axle of a truck and trailer forms a substantially continuous surface from the front to the rear axle, promoting laminar flow to the aft of the vehicle, minimizing the effect of suction drag.

Abstract: The purpose of this device is to reduce the fuel consumption of heavy trucks by improving airflow along the underside of a trailer, using a series of rectangular panels to close the gaps between trailer crossmembers and create a continuous smooth surface. These panels are placed in between adjacent crossmembers and secured to their flanges using a plurality of clamping mechanisms. Each clamp is comprised of a U nut fitted to edge of the panel and a half clip that is bolted to the bottom. With the U nut clamping down on the topside of the flange and the half clip gripping the bottom surface of the crossmember, these clamps secure each panel in place. These fittings, requiring no modification to the crossmembers themselves, are easily installed and readily removable.

Abstract: The purpose of the device is to minimize drag and turbulence otherwise occurring at the rear of a semi trailer, in order to reduced the consumption of fuel by a semi tractor. This is accomplished using directionally flexible sheets of composite material, which create contours that taper towards a terminating edge to form a teardrop shape, as established by panels attached to the top and bottom of either door. Along the trailing edge of the main body, another vertical panel known as a wake separator maintains separation between confliction columns of air. An additional wake separator attached to the bottom of the device performs a similar function, and will facilitate collapse in the event of a collision.