A strut assembly for mounting an aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer having a centerline, transverse structural support members extending between sides of the trailer, and longitudinal members extending along a length of the trailer. The strut assembly may comprise a mounting plate, a strut body, and a substantially rectangular composite spring. The mounting bracket comprising a mounting plate and a pair of spaced apart sidewalls. The strut body rotatably may be coupled to the pair of spaced apart sidewalls on the mounting bracket. The substantially rectangular composite spring may be coupled to an upper surface of the strut body and configured to contact an underside of the mounting plate of the mounting bracket to resist inward deflection from an external force applied to the strut body.

A semitrailer comprising a main frame having a hitch, an axle assembly connected to the main frame, the axle assembly including at least two wheels for rotation relative to the main frame, a fairing connected to an underside of the semitrailer intermediate the hitch and the axle assembly, the fairing including a pair of lateral surfaces, a bottom surface spaced from the underside of the semitrailer, and a leading surface, wherein the leading surface includes an intake opening, and wherein at least one of the bottom surface or the lateral surfaces includes an exit opening, and a flow path fluidly connects the intake opening and the exit opening.

An aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer. The aerodynamic fairing assembly may comprise a front skirt fairing and a rear skirt comprising a transition. The transition may extend outwardly of the side skirt fairing at a distance from the centerline of the trailer. The side skirt faring and rear skirt fairing are coupled to the trailer by one or more struts.

A strut assembly for mounting an aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer having a centerline, transverse structural support members extending between sides of the trailer, and longitudinal members extending along a length of the trailer. The strut assembly may comprise a mounting plate, a strut body, and a composite spring. The composite spring may be substantially rectangular. The mounting bracket comprising a mounting plate and a pair of spaced apart sidewalls. The strut body rotatably may be coupled to the pair of spaced apart sidewalls on the mounting bracket. The composite spring may be coupled to an upper surface of the strut body and configured to contact an underside of the mounting plate of the mounting bracket to resist inward deflection from an external force applied to the strut body.

An aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer. The aerodynamic fairing assembly may comprise a front skirt fairing and a movable skirt fairing that is configures to move forward and rearward along the length of the trailer. The front skirt faring and movable skirt fairing are coupled to the trailer by one or more mounting brackets.

The aerodynamic skirt assembly for attachment to a trailer may comprise a side skirt fairing, a rear skirt fairing, and a secondary treatment. The side skirt fairing may comprise an inner surface and an outer surface. The rear skirt fairing may comprise an inner surface and an outer surface and located aft of the side skirt fairing. The secondary treatment may be coupled to the outer surface of the rear skirt fairing, wherein the secondary treatment is canted outwardly at an angle from the outer surface of the skirt fairing and configured to redirect the air around the at least one rear wheel assembly.

A side skirt assembly for attachment to a trailer of a tractor-trailer, particularly to a trailer frame comprising transverse structural support members extending between sides of the trailer. The side skirt assembly comprises an elongated skirt panel, an elongated support and one or more skirt support members. The side skirt assemble comprises an inner surface and an outer surface. The elongated support is coupled to the elongated skirt panel on the inner surface thereof proximate an upper edge of the elongated skirt panel and extends at least a portion of the length of the elongated skirt panel. The more skirt support members couple the elongated skirt panel to a corresponding one or more or of the transverse structural support members.

A side skirt assembly for attachment to a trailer of a tractor-trailer, particularly to a trailer frame comprising transverse structural support members extending between sides of the trailer. The side skirt assembly comprises an elongated skirt panel, an elongated support and one or more skirt support members. The side skirt assemble comprises an inner surface and an outer surface. The elongated support is coupled to the elongated skirt panel on the inner surface thereof proximate an upper edge of the elongated skirt panel and extends at least a portion of the length of the elongated skirt panel. The more skirt support members couple the elongated skirt panel to a corresponding one or more or of the transverse structural support members.

A strut assembly for mounting an aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer having a centerline, transverse structural support members extending between sides of the trailer, and longitudinal members extending along a length of the trailer. The strut assembly may comprise a mounting plate, a strut body, and a substantially rectangular composite spring. The mounting bracket comprising a mounting plate and a pair of spaced apart sidewalls. The strut body rotatably may be coupled to the pair of spaced apart sidewalls on the mounting bracket. The substantially rectangular composite spring may be coupled to an upper surface of the strut body and configured to contact an underside of the mounting plate of the mounting bracket to resist inward deflection from an external force applied to the strut body.

The aerodynamic skirt assembly for attachment to a trailer may comprise a side skirt fairing, a rear skirt fairing, and a secondary treatment. The side skirt fairing may comprise an inner surface and an outer surface. The rear skirt fairing may comprise an inner surface and an outer surface and located aft of the side skirt fairing. The secondary treatment may be coupled to the outer surface of the rear skirt fairing, wherein the secondary treatment is canted outwardly at an angle from the outer surface of the skirt fairing and configured to redirect the air around the at least one rear wheel assembly.