Patent ID: 7201698

Claim:
A multi-stage transmission of a planetary design for a motor vehicle, comprising an input shaft ( 1 ) and an output shaft ( 2 ) located in a housing (G), first, second and third single-web planetary gear sets (P 1 ,P 2 , P 3 ), at least third, fourth, fifth, six and seventh ( 3 , 4 , 5 , 6 , 7 ), at least six shifting elements ( 03 , 04 , 14 , 36 , 56 , 57 ), including brakes and clutches whose selective engagement produces different reduction ratios between the input shaft ( 1 ) and the output shaft ( 2 ) so that eight forward gears and two reverse gears can be implemented, input results the input shaft ( 1 ) being permanently connected with a first element of the planetary gear set (P 1 ) and output results via the output shaft ( 2 ) being permanently connected with a ring gear of the second planetary gear set (P 2 ) and a ring gear of the third planetary gear set (P 3 ), the third shaft ( 3 ) being permanently connected with another element of the first planetary gear set (P 1 ), the fourth shaft ( 4 ) being permanently connected with a web of the second planetary gear set (P 2 ) and a web of the third planetary gear set (P 3 ), the fifth shaft ( 5 ) being permanently connected with a ring gear of the first planetary gear set (P 1 ), the sixth shaft ( 6 ) being permanently connected with a sun gear of the second planetary gear set (P 2 ), the seventh shaft ( 7 ) being permanently connected with a sun gear of the third planetary gear set (P 3 ), the third shaft ( 3 ) being attachable to the housing (g) by a first brake ( 03 ), the fourth shaft ( 4 ) being attachable to the housing (G) by a second brake ( 04 ), a first clutch ( 14 ) detachably interconnects the input shaft ( 1 ) and the fourth shaft ( 4 ), a second clutch ( 36 ) detachably interconnects the third shaft ( 3 ) and the sixth shaft ( 6 ), a third clutch ( 56 ) detachably interconnects the fifth shaft ( 5 ) and the sixth shaft ( 6 ) and a fourth clutch ( 57 ) detachably interconnects the fifth shaft ( 5 ) and the seventh shaft ( 7 ).