A continuously variable powertrain for vehicles may include an input shaft, a planetary gear train connected to the input shaft, a first clutch disposed to selectively connect rotation elements of the planetary gear set, a drive pulley disposed to receive power from the input shaft through the planetary gear set, a driven pulley connected to the drive pulley by a belt, an output shaft disposed concentrically with an axis of rotation of the driven pulley, a gear train connected between the input shaft and the output shaft in an external gear form, a second clutch disposed to transmit power from the input shaft through the gear train to the output shaft, and a third clutch disposed to transmit power from the driven pulley to the output shaft.

A continuously variable powertrain for vehicles may include an input shaft, a planetary gear train connected to the input shaft, a first clutch disposed to selectively connect rotation elements of the planetary gear set, a drive pulley disposed to receive power from the input shaft through the planetary gear set, a driven pulley connected to the drive pulley by a belt, an output shaft disposed concentrically with an axis of rotation of the driven pulley, a gear train connected between the input shaft and the output shaft in an external gear form, a second clutch disposed to transmit power from the input shaft through the gear train to the output shaft, and a third clutch disposed to transmit power from the driven pulley to the output shaft.

A powertrain for a hybrid vehicle may include a planetary gear set; a first motor-generator connected to one rotation element of the planetary gear set and an engine connected to the first motor-generator; a second motor-generator connected to another rotation element of the planetary gear set; a second clutch connected to the other rotation element of the planetary gear set and a second drive gear connected to the second clutch; a first clutch connected to the rotation element to which the first motor-generator is connected and a first drive gear connected to the first clutch; and an output shaft having a first driven gear and a second driven gear engaged in the first drive gear and the second drive gear, respectively.

A powertrain for a hybrid vehicle may include a planetary gear set; a first motor-generator connected to one rotation element of the planetary gear set and an engine connected to the first motor-generator; a second motor-generator connected to another rotation element of the planetary gear set; a second clutch connected to the other rotation element of the planetary gear set and a second drive gear connected to the second clutch; a first clutch connected to the rotation element to which the first motor-generator is connected and a first drive gear connected to the first clutch; and an output shaft having a first driven gear and a second driven gear engaged in the first drive gear and the second drive gear, respectively.

A power split transmission and a method of merging the power flows of the power split transmission are provided. A power input shaft drives a planetary gear set splitting the input power into a power flow over a variable power branch and into a power flow over a mechanical power branch. The power flows can be merged for driving a power take-off shaft. A reverser includes a first clutch, a second clutch, a first gear set and a second gear set. By engaging the first clutch and disengaging the second clutch the first gear set is driven, if an output shaft of the variable power branch and a mechanical transmission shaft are counter-rotating. By engaging the second clutch and the first clutch disengaging the second gear set is driven, if the output shaft of the variable power branch and the mechanical transmission shaft are co-rotating.

A method is provided for moving off of a vehicle with a hybrid drive line, comprising a combustion engine; a gearbox with input shaft connected to the combustion engine and output shaft; a first planetary gear, which is connected to the input shaft, a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; a first and second electrical machines respectively connected to the first and second planetary gears; a gear pair connected with the first main shaft; and a gear pair connected with the second main shaft. The method comprises: a) ensuring that the rotatable components of the first and second planetary gears are respectively disconnected from each other, b) ensuring that the corresponding gear pairs are engaged, and c) activating the first and second electrical machines so that a torque is generated in the output shaft.

The invention relates to a continuously variable transmission (CVT) comprising a ratio varying unit and a compound epicyclic gear set. The ratio varying unit has a rotating first side and a rotating second side, the rotational axes of the first and second sides being coaxial. The compound epicyclic gear set comprises a first set of planets, being rotationally mounted within a carrier and meshing with a sun gear. The epicyclic gear set also has a first annulus gear and a second set of planets; the second set of planets also being rotationally mounted within the carrier and meshing with a second annulus gear. One of the first or second rotating sides of the ratio varying unit is coupled to the carrier and the other of the first or second rotating sides of the ratio varying unit is coupled to the sun gear.

A gear scheme for an infinitely variable transmission includes an input shaft, an output shaft, a variator, and a pair of planetary gearsets located beside the variator rather than in front of or behind the variator. The variator and the planetary gearsets are coupled between the input and output shafts.

A gear scheme for an infinitely variable transmission includes an input shaft, an output shaft, a variator, and a pair of planetary gearsets located beside the variator rather than in front of or behind the variator. The variator and the planetary gearsets are coupled between the input and output shafts.

A power-split drive train for a working machine having a main drive element, drive output shafts (Ab1, Ab2, Ab3), and a continuous power-split transmission with three drive units (2a, 2b, 2c). The transmission enables all three output shafts to be operated at the same time with rotational speed variability. A first drive unit (2a) has two energy converters while second and third drive units (2b, 2c) each comprise one energy converter. All four energy converters are functionally connected to an electric line. The first unit (2a) is connected, via a first shaft, to the main drive element and, via a second shaft, to output shaft (Ab1). The first unit (2a) is connected to drive unit (2b) which is connected, via a third shaft, to output shaft (Ab2). The first drive unit (2a) is connected to drive unit (2c) which is connected, via a fourth shaft, to output shaft (Ab3).