A dolly vehicle includes at least one motion support device, MSD, and a control unit arranged for vehicle motion management, VMM, wherein the control unit is configurable in a master mode where the at least one MSD is controlled based on a set of capabilities of a vehicle combination comprising the dolly vehicle to fulfil an assigned task. The control unit is configurable in a slave mode where the at least one MSD is controlled based on requests received from an external master control unit.

A dolly vehicle includes at least one motion support device, MSD, and a control unit arranged for vehicle motion management, VMM, wherein the control unit is configurable in a master mode where the at least one MSD is controlled based on a set of capabilities of a vehicle combination comprising the dolly vehicle to fulfil an assigned task. The control unit is configurable in a slave mode where the at least one MSD is controlled based on requests received from an external master control unit.

A towable vehicle including a chassis, at least two wheels and a suspension assembly supporting each wheel. The suspension assembly includes a swing arm pivotally mounted to the chassis, an axle mounted proximate an end of the swing arm, the wheel being mounted on the axle, at least one shock absorber extending from the chassis to the swing arm, an airbag swing arm mounting pivotally coupled to the swing arm, an airbag chassis mounting coupled to the chassis, an airbag coupled to the airbag swing arm and airbag chassis mountings so that inflation of the airbag allows a suspension height to be adjusted over an operating range and a pivot arm pivotally mounted to the chassis and the airbag swing arm mounting to maintain an orientation of the airbag swing arm mounting over the operating range.

A towable vehicle including a chassis, at least two wheels and a suspension assembly supporting each wheel. The suspension assembly includes a swing arm pivotally mounted to the chassis, an axle mounted proximate an end of the swing arm, the wheel being mounted on the axle, at least one shock absorber extending from the chassis to the swing arm, an airbag swing arm mounting pivotally coupled to the swing arm, an airbag chassis mounting coupled to the chassis, an airbag coupled to the airbag swing arm and airbag chassis mountings so that inflation of the airbag allows a suspension height to be adjusted over an operating range and a pivot arm pivotally mounted to the chassis and the airbag swing arm mounting to maintain an orientation of the airbag swing arm mounting over the operating range.

A vehicle includes a frame, a first support member including a first end, a second end and an intermediate portion supporting a first axle receiver, a first bellows mounted to the first end of the first support member, a second bellows mounted to the second end of the first support member, a second support member including a first end portion, a second end portion and an intermediate section supporting a second axle receiver, a third bellows mounted to the first end portion of the second support member, a fourth bellows mounted to the second end portion of the second support member, a first drive unit including a first transmission mounted to the first support member, and a first electric motor connected to the first transmission, and a second drive unit including a second transmission mounted to the second support member, and a second electric motor connected to the second transmission.

A vehicle includes a frame, a first support member including a first end, a second end and an intermediate portion supporting a first axle receiver, a first bellows mounted to the first end of the first support member, a second bellows mounted to the second end of the first support member, a second support member including a first end portion, a second end portion and an intermediate section supporting a second axle receiver, a third bellows mounted to the first end portion of the second support member, a fourth bellows mounted to the second end portion of the second support member, a first drive unit including a first transmission mounted to the first support member, and a first electric motor connected to the first transmission, and a second drive unit including a second transmission mounted to the second support member, and a second electric motor connected to the second transmission.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a rear wheel assembly, a front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a rear wheel assembly, a front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

Electric, self-steer wagon-trailers may be provided. A trailer-to-tow vehicle electric, power-sharing booster system may extend the towing electric vehicle (EV) battery life/travel range. A high voltage, battery module recharge system may be provided that is compatible with standard, electric grid EV recharge connectors. A wagon style, highway speed, self-steer front axle system may eliminate trailer-to-vehicle vertical hitch load on the tow vehicle, which increases trailer and tow vehicle stability thus, increasing towing efficiencies and safety.

Electric, self-steer wagon-trailers may be provided. A trailer-to-tow vehicle electric, power-sharing booster system may extend the towing electric vehicle (EV) battery life/travel range. A high voltage, battery module recharge system may be provided that is compatible with standard, electric grid EV recharge connectors. A wagon style, highway speed, self-steer front axle system may eliminate trailer-to-vehicle vertical hitch load on the tow vehicle, which increases trailer and tow vehicle stability thus, increasing towing efficiencies and safety.