A transmission for a motor vehicle wherein the drive shaft (An) is rotationally fixedly connectable by the first shift element (K1) to the first shaft (1) and by the second shift element (K2) to the second shaft (2). The second shaft (2) is rotationally fixedly connectable by the fifth shift element (B2) to the housing (3). The third shaft (4) is rotationally fixedly connected to the third gear set element of the second planetary gear set (RS2) and to the first gear set element of the third planetary gear set and is rotationally fixedly connectable by the sixth shift element (B1) to the housing (3). The second gear set element of the third planetary gear set (RS3) is rotationally fixedly connected to the output shaft (Ab), and the third gear set element of the third planetary gear set (RS3) is rotationally fixedly connected to the second shaft (2).

An axle assembly may have at least one electric motor/generator. The motor/generator may be connected to a first sun gear. A first gear of a first planet carrier may be meshed with the first sun gear. A first ring gear may be meshed with a second gear of the first planet carrier. A second ring gear, a second sun gear and a second planet carrier may be provided. A selector sleeve may selectively connect a selector spline connected to the first ring gear and a ground for a low output speed, the selector sleeve may selectively connect the first and second ring gears with the first planet carrier for a high output speed and selector sleeve selectively connect to only the first ring gear for neutral.

An axle assembly may have at least one electric motor/generator. The motor/generator may be connected to a first sun gear. A first gear of a first planet carrier may be meshed with the first sun gear. A first ring gear may be meshed with a second gear of the first planet carrier. A second ring gear, a second sun gear and a second planet carrier may be provided. A selector sleeve may selectively connect a selector spline connected to the first ring gear and a ground for a low output speed, the selector sleeve may selectively connect the first and second ring gears with the first planet carrier for a high output speed and selector sleeve selectively connect to only the first ring gear for neutral.

An automatic torque transmission with one or more stages, where each stage has a number of available gear ratios. A planetary gear train includes a planet gear, a sun gear, and a ring gear. The planet gear is configured to drive the sun gear at higher speed and lower torque, and the ring gear at lower speed and higher torque. The sun gear is coupled to an input of a differential gear train. The ring gear is coupled to a different input of the differential gear train. A brake clutch can be selectively coupled to the ring gear, to provide selective braking of the ring gear so as to selectively transfer drive from the ring gear to the sun gear.

A planetary gear train of an automatic transmission for a vehicle may include an input shaft configured to receive power, an output shaft configured to output power; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements; a fifth planetary gear set including thirteenth, fourteenth, and fifteenth rotation elements; and first to ninth shafts connecting the rotation elements of the first to fifth planetary gear sets.

A planetary gear train of an automatic transmission for a vehicle may include an input shaft configured to receive power, an output shaft configured to output power; a first planetary gear set including first, second, and third rotation elements; a second planetary gear set including fourth, fifth, and sixth rotation elements; a third planetary gear set including seventh, eighth, and ninth rotation elements; a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements; a fifth planetary gear set including thirteenth, fourteenth, and fifteenth rotation elements; and first to ninth shafts connecting the rotation elements of the first to fifth planetary gear sets.

A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting torque and disposed in parallel with the input shaft; a compound planetary gear set having first, second, third, and fourth rotation elements and disposed at a radial external side of the input shaft; a simple planetary gear set having fifth, sixth, and seventh rotation elements and disposed at a radial external side of the output shaft; first to seventh shafts, each fixedly connected at least one among the first to seventh rotation elements; an eighth shaft selectively connectable to the input shaft; and two transfer gear sets operably connecting at least one shaft among the first to eighth shafts to another shaft.

A planetary gear train of an automatic transmission for a vehicle may include: an input shaft receiving torque of an engine; an output shaft outputting torque and disposed in parallel with the input shaft; a compound planetary gear set having first, second, third, and fourth rotation elements and disposed at a radial external side of the input shaft; a simple planetary gear set having fifth, sixth, and seventh rotation elements and disposed at a radial external side of the output shaft; first to seventh shafts, each fixedly connected at least one among the first to seventh rotation elements; an eighth shaft selectively connectable to the input shaft; and two transfer gear sets operably connecting at least one shaft among the first to eighth shafts to another shaft.

A power transmission apparatus of a hybrid electric vehicle may include an input shaft receiving an engine torque, an output shaft disposed at a same axis with the input shaft and outputting a shifted torque, first and second motor/generators, a first shifting section including a compound planetary gear set formed as a combination of first and second planetary gear sets, forming an adjusted torque from the engine torque received through two paths and torques of the first and second motor/generators, and outputting the adjusted torque, and a second shifting section including a third planetary gear set and outputting a shifted torque of two stages from a torque received from the first shifting section to the output shaft.

A power-split transmission comprises an electric variator (9) and an electric variator (10) which can be connected, by way of a clutch (8), for forward driving, and a clutch (7), for reverse driving, to the drive output shaft (5) in such manner that the drive output shaft (5) can be purely electrically driven even when the input shaft (2) is static.