A vehicle driveline including a first axle assembly having a first drive ratio. A second axle assembly in selective driving engagement with the first axle assembly, the first and second axle assemblies having a second drive ratio when in driving engagement. A control system in electrical communication with the first and second axle assemblies, wherein the control system selectively engages the second axle assembly with the first axle assembly.

The invention relates to a method for operating a vehicle/trailer unit, an appropriately designed vehicle/trailer unit, as well as a towing vehicle and an implement for such a vehicle/trailer unit, with the vehicle/trailer unit having a towing vehicle and an implement. The towing vehicle has a combustion engine and a first machine that can be operated as a prime mover, as well as a first axle that can be driven by means of the combustion engine, with it being possible for the combustion engine to be driven by means of the first machine. The implement has a second machine that can be operated as a work machine and a second axle that is mechanically coupled with the second machine. When the vehicle/trailer unit is in overrun mode and/or braking mode, the vehicle/trailer unit can be operated in a first operating mode in which the second machine is operated as a work machine and driven by means of the mechanical kinetic energy of the second axle, while the first machine is operated as a prime mover and drives the combustion engine, with it being possible for at least a portion of the energy generated by the second machine to be utilized to drive the first machine.

The invention relates to a method for operating a vehicle/trailer unit, an appropriately designed vehicle/trailer unit, as well as a towing vehicle and an implement for such a vehicle/trailer unit, with the vehicle/trailer unit having a towing vehicle and an implement. The towing vehicle has a combustion engine and a first machine that can be operated as a prime mover, as well as a first axle that can be driven by means of the combustion engine, with it being possible for the combustion engine to be driven by means of the first machine. The implement has a second machine that can be operated as a work machine and a second axle that is mechanically coupled with the second machine. When the vehicle/trailer unit is in overrun mode and/or braking mode, the vehicle/trailer unit can be operated in a first operating mode in which the second machine is operated as a work machine and driven by means of the mechanical kinetic energy of the second axle, while the first machine is operated as a prime mover and drives the combustion engine, with it being possible for at least a portion of the energy generated by the second machine to be utilized to drive the first machine.

A speed control system to control retardation energy of a vehicle and a method of controlling retardation energy of a vehicle are provided. The system includes an energy storage device configured to absorb and store the retardation energy of the vehicle. The energy storage device includes a power absorption limit determined at least partially by a temperature and a state of charge of the energy storage device. The system further includes a non-energy-storing retarder configured to absorb the retardation energy of the vehicle and a controller configured to route the retardation energy to the energy storage device up to the power absorption limit and route a remaining portion of the retardation energy to the non-energy-storing retarder.

A system for sensing a position of a first member relative to a second member based on a radio frequency characteristic of a bias member is disclosed. The bias member may be configured to bias the second member relative to the first member. Radio frequency circuitry may be configured to apply a radio frequency signal to the bias member and provide one or more signals indicative of a position of the first member relative to the second member based on a radio frequency characteristic of the bias member.

A system for sensing a position of a first member relative to a second member based on a radio frequency characteristic of a bias member is disclosed. The bias member may be configured to bias the second member relative to the first member. Radio frequency circuitry may be configured to apply a radio frequency signal to the bias member and provide one or more signals indicative of a position of the first member relative to the second member based on a radio frequency characteristic of the bias member.

A vehicle driveline including a first axle assembly having a first drive ratio. A second axle assembly in selective driving engagement with the first axle assembly, the first and second axle assemblies having a second drive ratio when in driving engagement. A control system in electrical communication with the first and second axle assemblies, wherein the control system selectively engages the second axle assembly with the first axle assembly.

A vehicle driveline including a first axle assembly having a first drive ratio. A second axle assembly in selective driving engagement with the first axle assembly, the first and second axle assemblies having a second drive ratio when in driving engagement. A control system in electrical communication with the first and second axle assemblies, wherein the control system selectively engages the second axle assembly with the first axle assembly.

Methods and systems are provided for electrically-assisted engine braking. In one example, a method may include operating a turbocharger by an electric motor during engine braking to increase air flow to an engine intake. The enhanced air flow into the engine intake increases an exhaust manifold pressure, thus increased a braking force provided by engine braking.

A method for exhaust braking includes monitoring, by a controller of a vehicle, an engine speed of an internal combustion engine; comparing, by the controller, the engine speed with the a predetermined braking speed threshold to determine whether the engine speed is greater than the a predetermined braking speed threshold; and, in response to determining that the engine speed is greater than the a predetermined braking speed threshold, switching the vehicle to an exhaust braking mode.