A method is provided for controlling a gear shift from a forward gear to a reverse gear in a transmission arrangement, the method including the steps of: positioning a first locking mechanism and a first connecting mechanism at least in a partially engaged state for reducing a rotational speed of a planet carrier of a second planetary gear set; and positioning a second locking mechanism in an engaged state when a rotational speed of the planet carrier of the second planetary gear set is below a predetermined threshold limit.

A planetary gear train includes an input shaft, an output gear, first to third planetary gear sets respectively having first to third, fourth to sixth, and seventh to ninth rotation elements, a first shaft fixedly connected to the second rotation element and the input shaft, a second shaft fixedly connected to the sixth and eighth rotation elements and the output gear, a third shaft fixedly connected to the first rotation element and a transmission housing, a fourth shaft fixedly connected to the third rotation element, a fifth shaft fixedly connected to the fourth and seventh rotation elements, a sixth shaft fixedly connected to the fifth rotation element, and a seventh shaft fixedly connected to the ninth rotation element.

A dual clutch transmission including two sub-transmissions, each having an input shaft arranged on an input axis, an intermediate shaft and an output shaft which is the drive output of both sub-transmissions. The intermediate shaft can be connected to the input and output shafts. The transmission also has wheel planes, shifting elements, two clutches and countershafts. A first countershaft can be connected to transmission elements of all the wheel planes on the countershaft axis and a second countershaft is connected to transmission elements of at least two wheel planes. The shifting elements include at least one single shifting element, but most of the shifting elements are double shifting elements. Two shifting elements are arranged on the input axis between two wheel planes, whose transmission elements are connected to the second countershaft. Opposite sides of the intermediate shaft are respectively connected to a range group and the output shaft.

A transmission arrangement for a vehicle includes a first, a second, a third, and a fourth planetary gear set including a sun gear, a planet carrier and a ring gear, respectively, wherein the transmission arrangement further includes a transmission housing, an input shaft and an output shaft, wherein the ring gear of the first planetary gear set and the input shaft are operatively connected to each other; the sun gear of the first planetary gear set, and the sun gear of the second planetary gear set are operatively connected to each other; the planet carrier of the second planetary gear set and the ring gear of the third planetary gear set are operatively connected to each other; the planet carrier of the third planetary gear set is operatively connected to the transmission housing; the sun gear of the third planetary gear set and the sun gear of the fourth planetary gear set are operatively connected to each other; and the planet carrier of the fourth planetary gear set and the output shaft are operatively connected to each other.

A transmission arrangement for a vehicle includes a first, a second, a third, and a fourth planetary gear set including a sun gear, a planet carrier and a ring gear, respectively, wherein the transmission arrangement further includes a transmission housing, an input shaft and an output shaft, wherein the sun gear of the first planetary gear set and the input shaft are operatively connected to each other; the ring gear of the first planetary gear set and the ring gear of the second planetary gear set are operatively connected to each other; the planet carrier of the second planetary gear set and the sun gear of the third planetary gear set are operatively connected to each other; the sun gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other; the planet carrier of the third planetary gear set and the ring gear of the fourth planetary gear set are operatively connected to each other; and the planet carrier of the fourth planetary gear set and the output shaft are operatively connected to each other.

A power transmission apparatus includes: an input shaft, an output gear; a compound planetary gear set including a first planetary gear set including first, second and third rotation elements, and a second planetary gear set including fourth, fifth and sixth rotation elements; a first shaft fixedly connected with the first rotation element and the fourth rotation element and selectively connected with the input shaft; a second shaft fixedly connected with the fifth rotation element, and selectively connected with the input shaft and a transmission housing; a third shaft fixedly connected with the second rotation element, the sixth rotation element and the output gear; a fourth shaft fixedly connected with the third rotation element; an intermediate shaft; a first gear set transmitting the torque from the input shaft to the intermediate shaft; and a second gear set selectively transmitting the torque from the intermediate shaft to the fourth shaft.

A transmission (G) for a motor vehicle includes a drive shaft (GW1), an output shaft (GW2), a first and a second planetary gear set (P1, P2), and a first, second, third, fourth and fifth shift element (04, 13, 14, 26, 36). Six forward gear ratios (1-6) between the drive shaft (GW1) and the output shaft (GW2) are engagable through selective pairwise closure of the five shift elements (04, 13, 14, 26, 36) and rotationally fixed immobilization of the sun gear (E11) of the first planetary gear set (P1).

A power transmission apparatus includes: an input shaft, an output gear; a compound planetary gear set including a first planetary gear set including first, second and third rotation elements, and a second planetary gear set including fourth, fifth and sixth rotation elements; a first shaft fixedly connected with the first rotation element and the fourth rotation element and selectively connected with the input shaft; a second shaft fixedly connected with the fifth rotation element, and selectively connected with the input shaft and a transmission housing; a third shaft fixedly connected with the second rotation element, the sixth rotation element and the output gear; a fourth shaft fixedly connected with the third rotation element; an intermediate shaft; a first gear set transmitting the torque from the input shaft to the intermediate shaft; and a second gear set selectively transmitting the torque from the intermediate shaft to the fourth shaft.

A transmission for a vehicle includes a primary transmission arrangement, a transmission housing, an input shaft, and an output shaft. The primary transmission arrangement includes a first, second and third planetary gear set each including a first, a second and a third planetary member, said planetary members being a sun gear, a planet carrier and a ring gear. The transmission arrangement further includes five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, and two planetary members of the third planetary gear set are selectively connectable to each other.

A transmission arrangement for a vehicle includes a first, a second, a third, and a fourth planetary gear set including a sun gear, a planet carrier and a ring gear, respectively, wherein the transmission arrangement further includes a transmission housing, an input shaft and an output shaft, wherein two of the sun gear, the planet carrier and the ring gear of the fourth planetary gear set are each operatively connected to a respective one of the input shaft, the sun gear, the planet carrier and the ring gear of the third planetary gear set.