Patent ID: 8894536

Claim:
A multi-stage transmission of a planetary design of a motor vehicle, the multi-stage transmission comprising: a drive shaft ( 1 ), an output shaft ( 2 ), a housing (G), a first planetary gear set (P 1 ), a second planetary gear set (P 2 ), a third planetary gear set (P 3 ), and a fourth planetary gear set (P 4 ), and each of the first, the second, the third and the fourth planetary gear sets comprising a sun gear, a carrier, and a ring gear, a plurality of rotatable shafts ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ) and a plurality of shift elements ( 03 , 04 , 26 , 39 , 58 , 78 ) comprising brakes ( 03 , 04 ) and clutches ( 26 , 39 , 58 , 78 ) whose selective engagement produces different transmission ratios between the drive shaft ( 1 ) and the output shaft ( 2 ), wherein the fifth shaft ( 5 ) continuously connects the sun gear of the first planetary gear set (P 1 ) with the ring gear of the third planetary gear set (P 3 ) and the fifth shaft ( 5 ) is connectable, via a first clutch ( 58 ), to an eighth shaft ( 8 ), the eighth shaft ( 8 ) is connected to the carrier of the second planetary gear set (P 2 ) and is connectable, via a second clutch ( 78 ), to a seventh shaft ( 7 ), which is continuously connected to the sun gear of the third planetary gear set (P 3 ) and the sun gear of the fourth planetary gear set (P 4 ), the drive shaft ( 1 ) is continuously connected to the carrier of the first planetary gear set (P 1 ) and is also connected to the ring gear of the second planetary gear set (P 2 ), the sun gear of the second planetary gear set (P 2 ) is connected to a ninth shaft ( 9 ) and the ninth shaft ( 9 ) is connectable, via a third clutch ( 39 ), to a third shaft ( 3 ), the third shaft ( 3 ) is connected to the carrier of the third planetary gear set (P 3 ), and the carrier of the third planetary gear set (P 3 ) is connectable, via a first brake ( 03 ), to the housing (G) of the transmission, the ring gear of the fourth planetary gear set (P 4 ) is connected to a fourth shaft ( 4 ) and the forth shaft ( 4 ) is connectable, via a second brake ( 04 ), to the housing (G) of the transmission, and the output shaft ( 2 ) is connected to the carrier of the fourth planetary gear set (P 4 ), the ring gear of the first planetary gear set (P 1 ) is continuously connected to a sixth shaft ( 6 ), and the output shaft ( 2 ), when a fourth clutch ( 26 ) is engaged, is solely connectable to the ring gear of the first planetary gear set (P 1 ).