Abstract: An aerodynamic system for a truck (12) is provided that has a faring (14) carried by the truck with an outer surface (24) that is an air flow surface across which air flows when the truck is moving forward. The faring has a tailing end with a first kick out (22) that has a first kick out exit surface (24) oriented at a first angle with respect to the air flow surface. The tailing end has a second kick out (28) with a second kick out exit surface (30) oriented at a second angle with respect to the air flow surface. The first angle is different than the second angle. The truck has a longitudinal axis, a longitudinal direction and a vertical direction. The air flow surface is located forward from the tailing end in the longitudinal direction, and the first kick out is located higher than the second kick out in the vertical direction.

Abstract: An apparatus for a trailer is provided that has a top fairing configured for being mounted to a top surface of the trailer at a location closer to the back of the trailer than the front of the trailer. The trailer has a longitudinal direction, a lateral direction, and a vertical direction. First and second side fairings are also included and are configured for being mounted to respective first and second side surfaces of the trailer. Additionally, first and second trailer skirts are configured for being carried by the trailer and are part of the apparatus. First and second trailer rear skirts are likewise included and are located rearward of the first and second trailer skirts. The combination of components provides aerodynamic benefit to the trailer.

Abstract: An apparatus for a trailer is provided that has a top fairing configured for being mounted to a top surface of the trailer. The trailer has a longitudinal direction, a lateral direction, and a vertical direction. A side fairing is present and is configured for being mounted to a side surface of the trailer. A corner at the side fairing and the top fairing has an outer surface with a first location and a second location. The first location is located forward of the second location in the longitudinal direction, and the first location has a radius of curvature that is smaller than a radius of curvature of the second location. The top and side fairings are configured for being mounted at locations closer to the back of the trailer than to the front of the trailer.

Abstract: Embodiments of the disclosure include a mud flap for a vehicle having a mounting section and a barrier section. The barrier section is configured to deflect matter discharged from a tire during vehicle operation. The width of the mounting section is greater than the width of the barrier section. The mounting section optionally includes a first set of mounting features, each of the mounting features forming a recess or aperture. One mounting feature of the first set of mounting features is arranged at and/or beyond a widthwise extent of the barrier section width. The one mounting feature is also arranged at least partially within a portion of the mounting section width extending outwardly from a widthwise extent of the barrier section width.

Abstract: Embodiments include a mud flap having a barrier section configured to intercept and deflect matter discharged from the tire when rotating during vehicle operation. The barrier section including a plurality of horizontal louvers, each horizontal louver forming an elongate member having a length extending primarily in a direction of the mud flap width, where the plurality of horizontal louvers are spaced apart in the direction of the mud flap height in the form of an array, where the plurality of horizontal louvers are configured to intercept and deflect matter of a minimum size traveling along any linear trajectory path from the outer circumference of the tire/wheel assembly towards the front side of the mud flap while substantially maximizing the spacing between adjacent louvers to minimize aerodynamic drag. Other embodiments provide a method of using the mud flap.

Abstract: The present invention includes methods and apparatus for flexibly attaching a trailer skirt to a trailer. This can include attaching a trailer mounting bracket to a trailer and attaching a bi-modulus bending member to the trailer mounting bracket in a cantilevered configuration at a bracket end of the bi-modulus bending member. The bi-modulus bending member includes a bending element set configured to elastically buckle when a lateral force component exceeds a threshold force, and the bi-modulus bending member is configured to return to a straightened configuration after buckling and bending to a buckled configuration when the threshold force is removed.

Abstract: The present invention includes methods and apparatus for mounting a trailer skirt to a trailer. This includes attaching a trailer skirt to a trailer, the trailer skirt configured to pivot in a longitudinal direction of the trailer skirt. In certain embodiments, such methods are accomplished using a trailer-skirt coupling apparatus, the apparatus including a trailer mounting bracket configured for mechanically coupling the apparatus to a trailer and a skirt-supporting member operably attached to the trailer mounting bracket in a cantilevered configuration, where in the cantilevered configuration, the skirt-supporting member is configured to pivot in a longitudinal direction of the trailer skirt.

Abstract: Particular embodiments of the invention comprise a wake disruptor (112) for use on the rear side (102) of a land vehicle (100), a method of using the wake disruptor to reduce drag of a land vehicle, and a land vehicle including the wake disruptor. The wake disruptor forms a protrusion extending outwardly from a rear side of the land vehicle by a distance of 1.5 to 8 inches and has a length extending at least partially in a direction of the vehicle width. The land vehicle may comprise a motorized or powered vehicle and/or a towed object, such as a trailer.

Abstract: The present invention includes methods and apparatus for attaching a trailer skirt to a trailer. Embodiments of the methods include attaching a skirt-supporting member to a trailer in a cantilevered configuration, and operably coupling a trailer skirt to the skirt-supporting member to provide a sliding coupling between the trailer skirt and the skirt-supporting member. Embodiments of the apparatus provide a trailer-skirt coupling apparatus including a trailer mounting bracket configured for mechanically coupling the apparatus to a trailer, a skirt-supporting member operably attached to the trailer mounting bracket in a cantilevered configuration, and a skirt channel configured to slidingly couple the skirt-supporting member to the trailer skirt.

Abstract: An aerodynamic trailer system is provided that has a skirt support member with a trailer attachment that attaches the skirt support member to a trailer. The skirt support member has a skirt attachment that attaches the skirt support member to a skirt. The skirt has a height that extends in a vertical direction of the aerodynamic trailer system. The skirt has an upper side, a lower side, a front side, and a rear side. The skirt also has a lower section that extends in the vertical direction from the lower side to an attachment location with the skirt attachment. The skirt has an upper section that extends in the vertical direction from the attachment location to the upper side. The lower section has a higher bending stiffness than the upper section.

Abstract: An aerodynamic system for a truck (12) is provided that has a faring (14) carried by the truck with an outer surface (24) that is an air flow surface across which air flows when the truck is moving forward. The faring has a tailing end with a first kick out (22) that has a first kick out exit surface (24) oriented at a first angle with respect to the air flow surface. The tailing end has a second kick out (28) with a second kick out exit surface (30) oriented at a second angle with respect to the air flow surface. The first angle is different than the second angle. The truck has a longitudinal axis, a longitudinal direction and a vertical direction. The air flow surface is located forward from the tailing end in the longitudinal direction, and the first kick out is located higher than the second kick out in the vertical direction.

Abstract: The subject matter of the present invention relates generally to a vehicle that has axles with tires mounted thereon with at least one axle that is a lift axle, and more specifically, to a method that optimizes the effective tire rolling resistance by adjusting the load on the tires, resulting in an improvement in the fuel economy of the vehicle. According to one embodiment, the method takes into consideration the rolling resistance characteristics of the tires placed onto the axles of the vehicle and provides an algorithm for optimizing their rolling resistance by raising or lowering the lift axle.

Abstract: The present invention includes methods and apparatus for mounting a trailer skirt to a trailer. This includes attaching a trailer skirt to a trailer, the trailer skirt configured to pivot in a longitudinal direction of the trailer skirt. In certain embodiments, such methods are accomplished using a trailer-skirt coupling apparatus, the apparatus including a trailer mounting bracket configured for mechanically coupling the apparatus to a trailer and a skirt-supporting member operably attached to the trailer mounting bracket in a cantilevered configuration, where in the cantilevered configuration, the skirt-supporting member is configured to pivot in a longitudinal direction of the trailer skirt.

Abstract: The present invention includes methods and apparatus for flexibly attaching a trailer skirt to a trailer. This can include attaching a trailer mounting bracket to a trailer and attaching a bi-modulus bending member to the trailer mounting bracket in a cantilevered configuration at a bracket end of the bi-modulus bending member. The bi-modulus bending member includes a bending element set configured to elastically buckle when a lateral force component exceeds a threshold force, and the bi-modulus bending member is configured to return to a straightened configuration after buckling and bending to a buckled configuration when the threshold force is removed.

Abstract: The present invention includes methods and apparatus for attaching a trailer skirt to a trailer. Embodiments of the methods include attaching a skirt-supporting member to a trailer in a cantilevered configuration, and operably coupling a trailer skirt to the skirt-supporting member to provide a sliding coupling between the trailer skirt and the skirt-supporting member. Embodiments of the apparatus provide a trailer-skirt coupling apparatus including a trailer mounting bracket configured for mechanically coupling the apparatus to a trailer, a skirt-supporting member operably attached to the trailer mounting bracket in a cantilevered configuration, and a skirt channel configured to slidingly couple the skirt-supporting member to the trailer skirt.

Abstract: The subject matter of the present invention relates generally to a vehicle that has axles with tires mounted thereon with at least one axle that is a lift axle, and more specifically, to a method that optimizes the effective tire rolling resistance by adjusting the load on the tires, resulting in an improvement in the fuel economy of the vehicle. According to one embodiment, the method takes into consideration the rolling resistance characteristics of the tires placed onto the axles of the vehicle and provides an algorithm for optimizing their rolling resistance by raising or lowering the lift axle.

Abstract: The subject matter of the present invention relates generally to a vehicle that has axles with tires mounted thereon with at least one axle that is a lift axle, and more specifically, to a method that optimizes the effective tire rolling resistance by adjusting the load on the tires, resulting in an improvement in the fuel economy of the vehicle. According to one embodiment, the method takes into consideration the rolling resistance characteristics of the tires placed onto the axles of the vehicle and provides an algorithm for optimizing their rolling resistance by raising or lowering the lift axle.

Abstract: The subject matter of the present invention relates generally to a vehicle that has axles with tires mounted thereon with at least one axle that is a lift axle, and more specifically, to a method that optimizes the effective tire rolling resistance by adjusting the load on the tires, resulting in an improvement in the fuel economy of the vehicle. According to one embodiment, the method takes into consideration the rolling resistance characteristics of the tires placed onto the axles of the vehicle and provides an algorithm for optimizing their rolling resistance by raising or lowering the lift axle.

Abstract: Methods for measuring the electrical resistance of a tire including establishing contact between a tread face portion of the omega section and a grounded conductive surface and establishing contact between a mounting portion of the omega section and a mounting rim. An embodiment further includes measuring electrical resistance between each of two or more internal nodes of the omega section and the grounded conductive surface, wherein the two or more internal nodes are each a metal component cured in the tire and measuring electrical resistance between each of the two or more internal nodes of the omega section and the mounting rim and measuring electrical resistance between each of the two or more internal nodes of the omega section. A method may further include identifying a least conductive portion of the omega section as being the portion having the highest measured electrical resistance.