Abstract: A dual clutch transmission has a housing, a drive shaft arrangement, an output shaft and a countershaft. A plurality of gear sets is supported on the drive shaft arrangement and the countershaft, respectively. The gear sets are shifted by means of respective shifting clutches in order to engage different gears. The countershaft is connected to the output shaft via a constant output gear set. The gear sets are divided between two gear trains. A first forward gear and a reverse gear are each assigned to a different gear train. The gear set for the reverse gear is driven via an auxiliary shaft, which is in turn driven via a specific gear set. The specific gear set is assigned to the same gear train as the reverse gear.

Abstract: A step-by-step variable transmission has a housing, a drive input shaft device, a drive output shaft and a countershaft. A plurality of gearwheel sets are mounted on the drive input shaft and on the countershaft. The gearwheel sets can be shifted so as to establish different gear stages by means of respective shift clutches. The countershaft is connected to the drive output shaft by means of a drive output constant wheel set. The drive output shaft is rotatably mounted in the region of its opposite ends on the housing by means of two bearings. At least one of the gearwheel sets is mounted in the region in the axial direction between the two bearings of the drive output shaft.

Abstract: A dual clutch transmission has a housing, a drive shaft arrangement, an output shaft and a countershaft. A plurality of gear sets is supported on the drive shaft arrangement and the countershaft, respectively. The gear sets are shifted by means of respective shifting clutches in order to engage different gears. The countershaft is connected to the output shaft via a constant output gear set. The gear sets are divided between two gear trains. A first forward gear and a reverse gear are each assigned to a different gear train. The gear set for the reverse gear is driven via an auxiliary shaft, which is in turn driven via a specific gear set. The specific gear set is assigned to the same gear train as the reverse gear.

Abstract: A step-by-step variable transmission has a housing, a drive input shaft device, a drive output shaft and a countershaft. A plurality of gearwheel sets are mounted on the drive input shaft and on the countershaft. The gearwheel sets can be shifted so as to establish different gear stages by means of respective shift clutches. The countershaft is connected to the drive output shaft by means of a drive output constant wheel set. The drive output shaft is rotatably mounted in the region of its opposite ends on the housing by means of two bearings. At least one of the gearwheel sets is mounted in the region in the axial direction between the two bearings of the drive output shaft.

Abstract: An automatic variable-speed transmission for setting up a plurality of gear steps with an input shaft, an output shaft and two transmission units which form two parallel branches. One branch has a multi-step transmission and the other a summing transmission with a friction clutch for starting and for central synchronization, the friction clutch having a first friction element and a second friction element, one of the friction elements being connectable to various transmission elements by means of at least one shift element, with at least one first power command range for gear-step changes between low gear steps and at least one second power command range for at least the gear change into the highest gear step and for the highest gear step. In this case, the at least one shift element connects the one friction element to transmission elements such that there is reduced reactive-power flow in any operating mode.

Abstract: An automatic variable-speed transmission for setting up a plurality of gear steps with an input shaft, an output shaft and two transmission units which form two parallel branches. One branch has a multi-step transmission and the other a summing transmission with a friction clutch for starting and for central synchronization, the friction clutch having a first friction element and a second friction element, one of the friction elements being connectable to various transmission elements by means of at least one shift element, with at least one first power command range for gear-step changes between low gear steps and at least one second power command range for at least the gear change into the highest gear step and for the highest gear step. In this case, the at least one shift element connects the one friction element to transmission elements such that there is reduced reactive-power flow in any operating mode.