A vehicle suspension position adjustment arrangement including a frame member having a plurality of apertures, and a trailing arm having a first end pivotally coupled to a slide member and a second end biased away from the frame member. A locking pin movable between an unlocked position where the locking pin is withdrawn from one of the apertures and the slide member is free to slide along the frame member, and a locked position where the locking pin engages one of the apertures preventing the slide member from sliding along the frame member, and a plurality of sensors spaced along the frame member, wherein a single sensor of the plurality of sensors is configured to sense both the locking condition of the locking pin and the location of the locking pin along the frame member.

A vehicle suspension arrangement includes a suspension slider assembly including first and second laterally spaced longitudinal frame members configured to be slidably coupled to a first vehicle frame member, first and second gusset members fixed to the first and second longitudinal frame members and each including a relief, a first lateral frame member extending between the first and second longitudinal frame members, the first lateral frame member having ends received within the reliefs, an axle member configured to support a pair of wheel assemblies, and a suspension assembly configured to support the suspension slider assembly from the axle member, the suspension assembly including a spring member positioned between the suspension slider assembly and the axle member.

A weight sensing assembly for a semi-trailer truck enabling balancing of a load includes a sensing module, which is one of a plurality thereof. The sensing modules are mountable to wheels of the semi-trailer truck so that each axle has a sensing module engaged to outside wheels thereof. The sensing module obtains a pressure measurement of a tire engaged to the wheel and transmits it to an electronic device. Programming code on the electronic device enables it to utilize a pressure change, upon positioning of a load upon the semi-trailer truck, to determine a weight that is positioned upon an associated axle. The electronic device calculates adjustments to positions of a sliding fifth wheel and of sliding tandems of the semi-trailer truck to obtain positions thereof that will achieve a legal weight distribution of the load. The electronic device presents, upon a screen thereof, the adjustments to a user.

A refrigerated composite semi-trailer is disclosed that may improve thermal efficiency, fuel efficiency, and costs of manufacturing.

A booster axle assembly includes a wheel axle, a suspension system coupled to the wheel axle, a booster frame supported by the suspension system, a main link coupled via a first hinged connection to a rear portion of the booster frame and extending from the first hinged connection in an upward and forward direction, a lock assembly coupled to a forward end of the main link via a second hinged connection, and a lockup frame (with a curved bottom portion that defines a cradle) coupled to a front end of the booster frame by a third hinged connection and coupled to the lock assembly by a fourth hinged connection and a fifth hinged connection.

A fifth wheel control arrangement (100) for an articulated vehicle comprising a fifth wheel having a biased hinge joint and an actuator (115) arranged to control a biasing force and/or a damping force of the biased hinge joint. The control arrangement comprises a control unit configured to automatically control the actuator in response to one or more input sensor signals associated with a current state of the articulated vehicle, to obtain a target wheel axle load of the articulated vehicle and/or to stabilize the articulated vehicle.

An adjustable trailer hitch and king pin assembly that may be moved longitudinally to adjust the position and weight distribution of a trailer relative to a truck. The disclosed assembly may allow a trailer to be utilized with various different sized and configured trucks while maximizing the cargo carrying capability and efficiency thereof. In one example, an adjustable trailer hitch is provided having a slidable king pin assembly that may be adjusted forwards or backwards to move the king pin to the desired location relative to the truck and trailer. In another example, a removable king pin may be provided that may be removed and moved to a different location according to the weight and desired weight distribution of a truck and trailer combination.

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.

A semi-trailer for transporting a load to be moved has a wheeled front module having a right-hand front row and a left-hand front row of front bogies each provided with a respective hydraulic suspension driven by its own hydraulic cylinder; a wheeled rear module comprising a right-hand rear row and a left-hand rear row of rear bogies each provided with a respective hydraulic suspension driven by its own hydraulic cylinder; a coupling unit of the wheeled front module for the coupling to a tractor and comprising a pair of hydraulic jacks for transferring a part of the load to be moved to the tractor; a first hydraulic unit interposed between the hydraulic cylinders of the front and rear rows of bogies and configured in such a way that the sum of the instantaneous load-supporting pressures acting on the hydraulic cylinders of the right front row and of the cylinders of the left-hand rear row is equal to the sum of the instantaneous pressures controlling the cylinders of the left-hand front row and of the cylinders of the right rear row; and a second hydraulic unit configured to control the hydraulic jacks based on the sum of the instantaneous load-supporting pressures acting on the hydraulic cylinders of said right front row and of said left-hand front row.

An auxiliary dolly attachable to the rear of a primary trailer includes a first portion attachable to the primary trailer, a second portion comprising one or more axles with wheels, and a pivot point at which the first portion is coupled to and movable relative to the second portion, and further includes one or more cylinders configured to adjust the first and second portions relative to each other and apportion weight between the primary trailer and the auxiliary dolly.