Patent ID: 7621840
Filing Date: 2009-11-24
Classification: F16H

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