A modular heavy goods vehicle (10) comprises a left vehicle module (12) and a differently designed right vehicle module (14), each of which includes a longitudinal frame part (20, 24) and at least two wheel subassemblies (22, 26), and two transverse frame modules (16, 18) which extend in the direction of the width (B) of the vehicle and the free ends of which are releasably connected to the longitudinal frame parts (20, 24), the length of the transverse frame modules being adjustable.

A tractor-trailer for hauling a load is provided which is convertible from a conventional steering arrangement to a stinger steering arrangement to maneuver relatively long loads around tighter corners, roundabouts and other obstacles. The tractor-trailer includes a rear wheel assembly with a telescoping reach and a towing tractor including a chassis and a stinger to selectively attach to the telescoping reach of the rear wheel assembly. The stinger is movably coupled to the chassis to move between a stowed configuration for conventional steering and a deployed configuration for stinger steering.

Apparatus and methods are provided to eliminate transient swaying of a towed vehicle imparted upon the towed vehicle during a towing operation by decoupling the towing and towed vehicles rotationally from each other. In one embodiment this is accomplished through the use of a doubly hinged tow bar and to steer the towed vehicle based upon the relative angular deflections of the two vehicles while subtracting out transient rotations of the towing vehicle.

Methods and apparatus to control a vehicle trailer using torque vectoring are disclosed. An example apparatus to control a trailer of a vehicle includes condition determination circuitry to determine, based on data from sensors on at least one of the trailer or the vehicle, whether a condition associated with the vehicle is satisfied, and torque control circuitry to adjust, in response to the condition being satisfied, a first torque of a first motor and a second torque of a second motor, the first motor operatively coupled to a first wheel of the trailer, the second motor operatively coupled to a second wheel of the trailer.

Methods and apparatus to control a vehicle trailer using torque vectoring are disclosed. An example apparatus to control a trailer of a vehicle includes condition determination circuitry to determine, based on data from sensors on at least one of the trailer or the vehicle, whether a condition associated with the vehicle is satisfied, and torque control circuitry to adjust, in response to the condition being satisfied, a first torque of a first motor and a second torque of a second motor, the first motor operatively coupled to a first wheel of the trailer, the second motor operatively coupled to a second wheel of the trailer.

A method for controlling steering of a self-powered steerable dolly vehicle during a maneuver, the method comprising determining an articulation angle associated with a drawbar of the dolly vehicle, determining a longitudinal velocity of the dolly vehicle, and controlling the steering of the dolly vehicle based on the articulation angle and on the longitudinal velocity of the dolly vehicle, wherein the controlling comprises initially steering the dolly vehicle in a direction of the articulation angle direction in case the longitudinal velocity of the dolly vehicle is above a velocity threshold.

A control device and method for controlling a tag axle steering system, configured to steer tag axle wheels of a tag axle, are provided. The method comprises, when the steering angle of the tag axle wheels is offset from a steering angle of a neutral position of the tag axle wheels and in response to a fault signal indicating malfunction of the tag axle steering system, locking the position of the tag axle wheels at a current steering angle of the tag axle wheels. A computer program and a computer-readable medium, as well as a vehicle, are also disclosed.

An auxiliary dolly is attachable to the rear of a primary trailer. The auxiliary dolly includes a first portion attachable to the primary trailer; a second portion comprising a chassis with one or more axles with wheels and a payload portion on the chassis. The payload portion is configured to pivot relative to the chassis with one or more axles with wheels of the second portion. A pivot point is at the point where the first portion is coupled to and movable relative to the second portion. Two or more cylinders are configured to pivot the payload portion of the second portion relative to the chassis with one or more axles with wheels of the second portion he pivot allows the payload portion to be substantially aligned with the primary trailer while turning.

In one or more arrangements, a trailer system is presented. In one or more arrangements, the trailer system includes a front wheel assembly having wheels and a rear wheel assembly having wheels. In one or more arrangements, the wheels of the front wheel assembly turn when the trailer is performing a turn and the wheels of the rear wheel assembly turn when the trailer is performing a turn. In one or more arrangements, the trailer system is configured to support an agricultural implement.

A front-wheel drive electric truck cab has a front axle/turntable with independent electric motor driven wheel ends. The front axle/turntable is able to execute various extreme maneuvers including a zero-cab-turn, pivot-in-place maneuver at least through about a 90 pivot from a straight ahead heading. For example, left wheel end is going to be accelerated smoothly to two miles per hour rearward (not forward) speed at the same time, in unison but independently, the right wheel end is going to be accelerated smoothly to two miles per hour in forward speed. Thus, the left and right wheel ends are being driven in exactly opposite directions. The following happens. The cab does not move: not forward, not backward; nor in a forward or backward turn. The turntable/front suspension assembly pivots in place counterclockwise about its central vertical axis (at least through about a 90 pivot from a straight ahead heading).