Motor vehicle transmission

摘要

A motor vehicle transmission having two partial transmissions with coaxial input shafts which can connect to an output shaft. The inputs of the first and second partial transmissions are a central shaft and a hollow shaft, respectively, that are coaxial with the output shaft. A countershaft assembly is parallel to the input and output shafts, to transmit rotation from the drive input to the output via a variety of gears. Gear stages (10-15) and shift elements (S1 to S7) selectively engage to change gears in the partial transmissions The hollow shaft couples stage (10) to a solid shaft of the countershaft assembly which has hollow shaft (9) that can couple the solid shaft via shifting element (S1) and can couple, via stage (11). Actuating shifting element (S2) to the central shaft of the first partial transmission which directly couples the output shaft via shifting element (S3).

主权项

1. A motor vehicle transmission comprising:
first and second partial transmissions, and each partial transmission having an input shaft arranged coaxially with one another, each of the input shafts being alternately connectable to a drive input (3) and, in a flow of force, to a drive output (4), the input shaft of the first partial transmission is a central transmission shaft (1) and the input shaft of the second partial transmission is a hollow transmission shaft (2), the drive output (4) of both the first and the second partial transmissions being an output shaft (6) positioned coaxially with both of the input shafts, a countershaft assembly (7) being arranged parallel to the input shafts and the output shaft (6), rotational movement being transmittable from the drive input (3) to the drive output (4) via one of several discrete gear ratios, each of the gear ratios being obtained by directing the flow of force, via the countershaft assembly (7), by at least two spur gear stages (10 to 15) and by actuating at least one associated shifting element (S1, S2, S4 to S7), and changing between the first and the second partial transmissions such that gearshifts being powershifts, the hollow transmission shaft (2) of the second partial transmission being connected to a solid shaft (8) of the countershaft assembly (7) by a first spur gear stage (10) on which a coaxial hollow shaft (9) being additionally mounted, the hollow shaft (9) being connectable, in a rotationally fixed manner, by a first shifting element (S1) to the solid shaft (8), and the hollow shaft (9) being connectable, via a second spur gear stage (11) and by actuating a second shifting element (S2), to the input shaft (1) of the first partial transmission, the input shaft of the first partial transmission being directly connectable, by only a third shifting element (S3), with the output shaft (6), and further spur gear stages (12 to 15) being provided between either the solid shaft (8) or the hollow shaft (9) and the output shaft (6).