Abstract: The purpose of this device is to reduce the fuel consumption of heavy trucks by improving airflow to the rear of the trailer and reduce suction drag. Rather than restrict airflow to the side of the vehicle, diffusers streamline its aerodynamic profile and allow air to flow smoothly beneath. A large airfoil extending forward from the ICC bumper promotes stable airflow to the aft of the vehicle, reducing turbulence by keeping airflow at a consistent height. Fairings fitted to other structures such as the bumper uprights further shape and stabilize airflow.

Abstract: The primary purpose of this device is to reduce the fuel consumption of heavy trucks by improving airflow along the underside of a trailer, by way of a fairing mounted forward of the axles. This fairing is a teardrop shaped wedge with a flat bottom surface, which directs air towards the sides of the vehicle, while allowing a smaller volume to flow beneath the fairing such that it will clear the axles. Each axle is also covered by a flat panel, such that air will continue to travel smoothly beneath them. Attached to each panel is a brake cooling system, which consists of a pair of panels protruding downward, with their surfaces parallel to the direction of airflow. When the brakes are engaged, these panels rotate towards the center in an angled configuration, which redirects air towards the drums during and after braking, cooling them quickly and efficiently.