A differential assembly includes a differential, a collar, and a coupling. The differential has a differential input and differential gearing. The differential input is rotatable about a differential axis. The differential gearing has first and second differential output gears that are rotatable relative to the differential input about the differential axis. The differential gearing transmits rotary power between the differential input and the first and second differential output gears. The collar is rotatable about the differential axis. The coupling has first and second coupling members. The first coupling member is fixedly coupled to the first side gear. The second coupling member is fixedly coupled to the collar. The coupling is operable in a disengaged mode, in which the collar is rotationally decoupled from the first differential output gear, and an engaged mode in which the collar is rotatably coupled to the first differential output gear.

A transmission assembly for an electric drive comprises a drive shaft, a reduction gearing rotatably drivable by the drive shaft, a power distribution unit drivingly connected to the reduction gearing and configured to transmit a rotational motion to two output parts, a parking lock unit having a parking ratchet wheel which is connected in a rotationally fixed manner to a torque-transmitting member in the power path between the drive shaft and the output parts, and having a controllable locking element which can be selectively engaged with the parking ratchet wheel; wherein the parking lock unit is arranged in a parking lock housing which is liquid-tightly sealed with respect to a transmission housing so that a first oil bath in the transmission housing is separated from a second oil bath in the parking lock housing.

An electromotive drive assembly comprises a housing arrangement with a first and second housing element between which an intermediate plate is arranged; a drive unit comprising a drive shaft which is rotatably drivable about a first axis of rotation; a transmission arrangement with an intermediate shaft which extends through an opening of the intermediate plate and is rotatably drivable by the drive shaft, and with a power split unit which is drivingly connected to the intermediate shaft and is rotatably supported about a third axis of rotation coaxial with the first axis of rotation by a first bearing in the intermediate plate and a second bearing in the second housing element; and a clutch arrangement by which the power path between the drive unit and the power split unit can be selectively connected and disconnected, wherein the opening comprises a clutch receptacle on which at least one element of the controllable clutch arrangement is axially supported.

A method performs shifts in a dog clutch element of a transmission system in a hybrid vehicle. The vehicle has an input shaft being connected to a crankshaft of an internal combustion engine, an output shaft being connected indirectly to driven wheels, an electric machine which is in engagement with the input shaft, and an automatic transmission connected between the input and output shafts. The transmission has a dog clutch element for the releasable coupling of two transmission elements. During a desired shifting of the dog clutch element, the torque of the input shaft is adapted via the electric machine, and therefore a reduced load prevails in the region of the dog clutch element and the latter can be disengaged, after which the internal combustion engine is set to a desired target rotational speed, and after which the dog clutch element is engaged when the target rotational speed is reached.

The drive power connecting/disconnecting device includes a second shaft disposed coaxially to a first shaft so as to transmit drive power to a wheel axle, a connection/disconnection member which moves a second rotational body along an axial direction with respect to a first rotational body, and which is capable of moving in the axial direction so as to make or break engagement between the first shaft and the second shaft, a supporting member, a shaft cover which covers at least the periphery of the second rotational body, a first pivotally supporting portion which is disposed between the first shaft and the second shaft so as to axially support one end of the second shaft; and a second pivotally supporting portion which is disposed inside the shaft cover so as to axially support the other end of the second shaft.

A four-wheel drive vehicle comprises: a dog clutch; an electronically controlled coupling; and a control device switching a drive state to the four-wheel drive state when the control device determines that a running road surface is a low friction road and switching the drive state to the two-wheel drive state when the control device determines that the running road surface is a high friction road. In the case of switching the drive state from the four-wheel drive state to the two-wheel drive state, the control device temporarily releases the electronically controlled coupling to redetermine whether the running road surface is the low friction road or the high friction road before releasing the dog clutch and prohibits switching from the four-wheel drive state to the two-wheel drive state when it is redetermined that the running road surface is the low friction road.

A vehicle includes a tandem axle system having an inter-axle differential and clutching assembly, a forward or first axle assembly, and a rear or second axle assembly. The inter-axle differential and clutching assembly includes a differential mechanism having first and second side gears and a clutch mechanism having a clutch member and an actuator assembly. At least one of the first axle assembly and the second axle assembly is in selective driving engagement with the inter-axle differential and clutching assembly.

A drive axle system having at least one differential assembly, a first electric motor, and a second electric motor. The first electric motor and the second electric motor may be selectively connectable to the differential assembly. The first electric motor, the second electric motor, or both may provide torque to the differential assembly.

A clutch unit for a powertrain of a motor vehicle comprises a torque input component which acts as a drive element and a torque output component which acts as an output element. The torque input component can be connected to the torque output component in torque-transmissive fashion via an engageable clutch. The clutch has a translationally movable clutch element configured and arranged such that in an actuation position, the clutch element allows a torque to be transmitted from the torque input component to the torque output component via an interlocking engagement.

A work vehicle includes a power transmission unit having a differential device for transmitting power to left and right axles and a power transmission mechanism for transmitting power to the differential device, and a transmission shaft for transmitting power to the power transmission unit. The power transmission mechanism includes a first gear mechanism to which power from the transmission shaft is transmitted and a second gear mechanism for transmitting power from the first gear mechanism to the differential device.