A front end accessory drive system is disclosed. The system includes a hub configured to drivingly engage with a crankshaft and a gear transmission system. A one-way clutch includes a first bearing ring connected to an end of a plurality of planet pins of the gear transmission system, and a second bearing ring connected to a sun gear of the gear transmission system. A pump configured to direct hydraulic fluid through a hydraulic fluid circuit. A clutch pack is in fluid connection with the hydraulic fluid circuit. The clutch pack includes at least one clutch plate supported by the gear transmission system, such that a portion of the gear transmission system is grounded via frictional engagement of the at least one clutch plate in an actuated state of the clutch pack.

A hybrid powertrain may include an engine input shaft connected to an engine by a main clutch, a motor input shaft connected to a motor, first and second output shafts mounted in parallel to the engine input shaft, a variable driving gear provided on the motor input shaft to maintain or increase a rotation speed of the motor input shaft and then to transmit the maintained or increased rotation speed to the first output shaft, a composite synchronizer mounted to independently implement interruption of connection between the engine input shaft and the motor input shaft and interruption of connection between the variable driving gear and the motor input shaft, and plural gear pairs mounted to form different transmission gear ratios between the engine input shaft and the first output shaft and between the engine input shaft and the second output shaft.

A combination starter-generator device is provided for a work vehicle having an engine. The starter-generator device includes an electric machine and a gear set configured to receive rotational input from the electric machine and from the engine and to couple the electric machine and the engine in a first power flow direction and a second power flow direction. The gear set is configured to operate a first, second, or third gear ratio in the first power flow direction and a fourth gear ratio in the second power flow direction. At least one clutch is selectively coupled to the gear set to effect the first, second, and third gear ratios in the first power flow direction and the fourth gear ratio in the second power flow direction. A magnetic cam assembly is configured to shift the at least one clutch from a disengaged position into an engaged position.

A combination starter-generator device includes an electric machine and a gear set configured to receive rotational input from the electric machine and from the engine and to couple the electric machine and the engine in a first power flow direction and a second power flow direction. The gear set is configured to operate in one of multiple gear ratios in the first power flow direction and at least one gear ratio in the second power flow direction. The starter-generator device further includes a clutch arrangement with at least one active clutch selectively coupled to the gear set to effect the gear ratios in the first power flow direction and in the second power flow direction. The clutch arrangement further includes at least one drag clutch to apply a drag force on the gear set to slow the electric machine.

Methods and systems are provided for an electric axle assembly. In one example, a system includes an electric axle assembly configured to receive an output of a ring gear, wherein a differential of the electric axle assembly distributes the output to wheels of a vehicle.

A road vehicle with hybrid drive having: at least one pair of drive wheels; an internal combustion engine; a reversible electric machine; and a dual-clutch transmission. The dual-clutch transmission has: a first primary shaft and a second primary shaft; a first clutch interposed between the internal combustion engine and the first primary shaft; and a second clutch interposed between the internal combustion engine and the second primary shaft; a third clutch, which is interposed between a shaft of the electric machine and the first primary shaft so as to connect/disconnect the shaft of the electric machine to/from the first primary shaft; and a fourth clutch, which is interposed between the shaft of the electric machine and the second primary shaft so as to connect/disconnect the shaft of the electric machine to/from the second primary shaft.

A drive device for a hybrid-driven motor vehicle includes a primary drive, a secondary drive, and a variable speed gearbox. The primary and secondary drives are configured to drive the gearbox separately or jointly. The gearbox includes a first input shaft connectable to the primary drive, a second input shaft connectable to the secondary drive, an output shaft, and switching elements. In a first state of the gearbox, a rotational movement of a first fixed toothed wheel of a first intermediate shaft is synchronously coupled with a rotational movement of the output shaft by a first switching element. In a second state, a rotational movement of a first idler toothed wheel on the first input shaft is synchronously coupled with a rotational movement of a second idler toothed wheel on the first input shaft by a second switching element.

A drive device for a vehicle axle, especially a rear axle, of a two-track vehicle, wherein the vehicle axle comprises an axle differential, which can be connected at the primary end to a primary drive machine and can be connected at the output end across flange shafts arranged on either side to vehicle wheels of the vehicle axle, wherein the vehicle axle is associated with an additional drive machine and a shiftable superimposing gear, which can be shifted to a torque distribution gear in which a drive torque is generated by the additional drive machine, depending on the magnitude and direction of rotation of which a torque distribution on the two vehicle wheels can be changed, and shifted to a hybrid mode in which the drive torque generated by the additional drive machine can be coupled to both flange shafts of the vehicle wheels, evenly distributed across the axle differential.

A power transmission apparatus of a hybrid electric vehicle includes a first input shaft mounted along an axis of an engine shaft and selectively connectable to the engine shaft, a second input shaft formed as a hollow shaft, coaxially mounted with the first input shaft, and fixedly connected to a rotor of the first motor-generator, a third input shaft formed as a hollow shaft, coaxially mounted with the first input shaft, and selectively connectable to the first input shaft, an intermediate shaft mounted in parallel with the first input shaft, an output shaft mounted in parallel to the first input shaft and outputting a shifted toque, a planetary gear set mounted on the output shaft, having an element fixed to the output shaft and forming a shifted torque, and a plurality of gear sets mounted over the first, second, and third input shafts, the intermediate shaft, and the output shaft.

Systems and methods are provided for simulating rev-matching in hybrid electric vehicles (HEVs). In particular, increased engine response is provided while downshifting during acceleration. The transmission of an HEV may include an electronic control unit that controls the speed of the engine to simulate gears, and increases the speed of the engine responsive to a driver using the gear selector to shift from one of the simulated gears to a lower one of the simulated gears, thereby providing the desired rev-matching experience. The increased engine response can be reflected in a target engine speed that is calculated based on specific gear ratios associated with each of the simulated gears.