Patent ID: 7104915

Claim:
A multiple stage transmission of a planetary design, for an automatic motor vehicle, comprising a housing (g) accommodating a drive shaft ( 1 ) and a driven shaft ( 2 ), first second and third planetary gear sets (P 1 , P 2 , P 3 ), at least a third shaft, a fourth shaft, a fifth shaft and a sixth shaft ( 1 , 2 , 3 , 4 , 5 , 6 ), at least six shifting elements ( 03 , 04 , 13 , 15 , 46 , 56 ) including first and second brakes ( 03 , 04 ) and first, second, third and fourth clutches ( 13 , 15 , 46 , 56 ) which are selectively engageable for producing different reduction ratios between the drive shaft ( 1 ) and the driven shaft ( 2 ) so that the multiple stage transmission is able to implement either seven or eight forward gears and at least one reverse gear; the drive shaft ( 1 ) being permanently connected with a ring gear of the first planetary gear set (P 1 ) and connectable, via the second clutch ( 15 ), with the fifth shaft ( 5 ), which is connected with a sun gear of the second planetary gear set (P 2 ) and with a sun gear of the third planetary gear set (P 3 ) and connectable, via the fourth clutch ( 56 ), with the sixth shaft ( 6 ); the sixth shaft ( 6 ), on a first side, being connected with a spider of the first planetary gear set (P 1 ) and, on another side, being connectable via the third clutch ( 46 ) with the fourth shaft ( 4 ) which is permanently connected with a spider of the second planetary gear set (p 2 ) and attachable to the housing (G) via the second brake ( 04 ), the driven shaft ( 2 ) being connected with a spider of the third planetary gear set (P 3 ) and a ring gear of the second planetary gear set (P 2 ), the third shaft ( 3 ) being permanently connected with a ring gear of the third planetary gear set (P 3 ), via the first clutch ( 13 ), connectable with the drive shaft ( 1 ) and attachable to the housing (G) via the first brake ( 03 ), a sun gear of the first planetary gear set (P 1 ) being non-rotatably connected with the housing (G) via one additional shaft ( 0 ).