A powertrain of a vehicle includes a stepped planetary gearset, a first gear shifting element and a second gear shifting element. The stepped planetary gearset has a first sun gear and a second sun gear, a first ring gear and a plurality of stepped planet gears rotatably mounted at a first planet carrier. The first ring gear is configured to drivingly connect to an electric machine. The first planet carrier is connectable to an output shaft of the gear unit to be fixed with respect to relative rotation. The first gear shifting element is configured to fix the second sun gear relative to a housing in a closed state, and the second gear shifting element is configured to fix the first sun gear relative to the housing in a closed state. One of the two gear shifting elements is in the closed state for driving the output shaft in rotation.

A transfer case includes a primary output shaft, a secondary output shaft, a clutch, and a hub. The clutch includes a plurality of interleaved plates for selectively rotationally coupling the primary output shaft to the secondary output shaft. The hub rotationally couples the primary output shaft and the clutch. The hub includes an outer annular member and an inner annular member. The inner annular member is rotatable within the outer annular member for the hub to selectively release oil into the clutch.

The invention relates to a multi-speed transmission (10, 110), comprising a power split device (11; 111), an input shaft (12, 112) of the transmission (10, 110) being connected or connectable to prime mover (18, 118), an output shaft (13; 113), two shiftable sub-transmissions (14, 114; 15, 115), each providing a plurality of different gear ratios, and at least one rotating electric machine (16; 116, 116a), connected to said power split device (11; 111), wherein the two sub-transmissions (14, 114; 15, 115) can be connected alternatively to the output shaft (13, 113), and a control system (26; 126, 126a), connecting said electric machine (16; 116, 116a) with an electric battery (27; 127) and auxiliary electrical consumers (31, 131). The electric machine (16; 116, 116a) is connected to the power split device (11; 111) in a way that it allows to reduce torque value down to zero on either an input shaft (20; 120) of the first sub-transmission (14; 114) or on an input shaft (22; 122) of the second sub-transmission (15; 115) by applying different shaft torque levels, and the internal heat generation capacity of the electric machine (16; 116, 116a) exceeds the power capacity of the power line in said control system (26; 126, 126a).

A powertrain system is described, and includes an internal combustion engine having a crank member, a torque machine having a rotatable shaft member, and a transmission having an input member and an output member. The crank member of the internal combustion engine is couplable to the input member of the transmission. The rotatable shaft member of the torque machine is couplable to the crank member of the internal combustion engine at a first gear ratio. The rotatable shaft member of the torque machine is couplable to the input member of the transmission at a second gear ratio. The first gear ratio is less than the second gear ratio.

Disclosed is an automatic transmission for a hybrid vehicle, the automatic transmission including an input shaft driven by the combustion engine, an output gearwheel, ring gear or pinion, a stationary element such as a casing for example, an electric machine of which the stator is secured to the stationary element, first, second, third, fourth and fifth selective torque transmitting members that can be selectively engaged or activated in order to establish different transmission ratios, a single double planetary gearset of the Ravigneaux type (TPR) the constituent functional elements of which are arranged as two sets of planetary gears connected by the aforementioned members to the input shaft and to the stationary element, the rotor of the electric machine being mounted on a functional element that injects the movement of the gearset.

A powertrain for a hybrid vehicle may include a complex planetary gear set including four rotation elements having first, second, third, and fourth rotation elements; a motor-generator fixedly connected to the first rotation element of the complex planetary gear set; a first brake configured to selectively connect the second rotation element of the complex planetary gear set to a transmission housing; an input shaft connected to an engine and configured to be selectively connectable to each of the first rotation element and the third rotation element of the complex planetary gear set; and an output shaft connected to the fourth rotation element of the complex planetary gear set.

A transfer case includes primary and secondary output shafts, along with a secondary torque transfer mechanism and a locking mechanism, which are configured to selectively couple the primary and secondary output shafts. The secondary torque transfer mechanism comprises a sprocket coupled to the secondary output shaft, and a plate clutch coupled to the sprocket to selectively form a friction coupling with the primary output shaft. The locking mechanism selectively couples the primary output shaft to the sprocket, and includes a locking sleeve and an actuator that moves the locking sleeve between a first position and a second position. In the first position, the locking sleeve forms a first splined connection with the primary output shaft and forms a second splined connection with the sprocket. In the second position, the locking sleeve forms the first splined connection with the primary output shaft and forms a second splined connection with the sprocket.

A transfer case includes an input shaft, a primary output shaft, a secondary output shaft, and an actuator. The primary output shaft is coupled to the input shaft with a gear reduction mechanism. The secondary output shaft is selectively coupleable to the primary output shaft with a secondary torque transfer mechanism. The actuator includes a first actuation mechanism, a second actuation mechanism, and a driver gear assembly. The first actuation mechanism is configured to operate the gear reduction mechanism. The second actuation mechanism is configured to operate the secondary torque transfer mechanism. The drive gear assembly includes a gear plate member, a sense plate member configured to engage the first actuation mechanism, and a hub member configured to engage the second actuation. The sense plate member and the hub member are independently coupled to the gear plate member to rotate in unison with the gear plate member.

A powertrain for a hybrid vehicle may include a complex planetary gear set including four rotation elements having first, second, third, and fourth rotation elements; a motor-generator fixedly connected to the first rotation element of the complex planetary gear set; a first brake configured to selectively connect the second rotation element of the complex planetary gear set to a transmission housing; an input shaft connected to an engine and configured to be selectively connectable to each of the first rotation element and the third rotation element of the complex planetary gear set; and an output shaft connected to the fourth rotation element of the complex planetary gear set.

Various methods and systems are provided for a drive arrangement for a vehicle including a housing, a double planetary gear set partially or fully contained within the housing, an input shaft selectively engaged with the double planetary gear set, a first clutch assembly coupled to the input shaft and selectively engaged with the double planetary gear set, a second clutch assembly coupled to the input shaft and selectively engaged with the double planetary gear set, and a sliding spline coupled to the input shaft and selectively engaged with the double planetary gear set. The double planetary gear set including a first sun gear, a second sun gear, a first set of planetary gears, a second set of planetary gears, a planetary gear carrier, and a ring gear, wherein components of the double planetary gear set are lockable thereby providing three different gear ratios.