Patent ID: 8016708
Filing Date: 2011-09-13
Classification: F16H

Abstract:
1. A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprising: an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS at least first, second, third, fourth, fifth, sixth, seventh and eighth rotatable shafts ( first, second, third, fourth and fifth gearshifting elements (A, B, C, D, E) whose selective engagement creates different gear ratios between the input shaft (AN) and the output shaft (AB) so that eight forward gears and at least one reverse gear can be implemented; wherein the first gearshifting element (A) is located in a force flow path between the third shaft ( the second gearshifting element (B) is located in a force flow path between the fourth shaft ( the third gearshifting element (C) is located in a force flow path between the first shaft ( the fourth gearshifting element (D) is located in a force flow path between the second shaft ( the fifth gearshifting element (E) is located in a force flow path between the fifth shaft ( the carrier (ST the carrier (ST the sun gear (SO the ring gear (HO the sun gear (SO the carrier (ST the sun gear (SO the ring gear (HO