Patent ID: 7678008
Filing Date: 2010-03-16
Classification: F16H

Abstract:
1. A multi-stage automatic transmission comprising: a drive input shaft (AN), a drive output shaft (AB), and a transmission housing (GG); a transfer gearset (VS) of a double planetary gearset design comprising a sun gear (SO_VS), a ring gear (HO_VS), a coupled carrier (ST_VS) rotatably supporting inner planetary gears (P a main gearset (HS) of a three-carrier, five-shaft coupled planetary gearset reduction transmission design comprising first, second and third sun gears (S at least first, second, third, fourth, fifth and sixth shift elements (A, B, C, D, E, F) and each of the first shift element (A), the second shift element (B), the third shift element (C), the fourth shift element (D), the fifth shift element (E) and the sixth shift element (F) having an input element ( an output element of the transfer gearset (VS) rotates at a rotational speed slower than a rotational speed of the drive input shaft (AN); an input element of the transfer gearset (VS) is fixed to the drive input shaft (AN); the output element of the main gearset (HS) is permanently connected to the drive output shaft (AB); the input element ( the output element ( the input element ( the output element ( the input element ( the output element ( the input element ( the output element ( the input element ( the output element ( the input element ( the output element ( the fifth shift element (E) and the sixth shift element (F) form a structural group comprising a disk carrier (ZYLEF) common to both the fifth shift element (E) and the sixth shift element (F), a disk set ( the inner planetary gears (P the outer planetary gears (P the coupled carrier (ST_VS) of the transfer gearset (VS) is the input element of the transfer gearset (VS); the ring gear (HO_VS) of the transfer gearset (VS) is the output element of the transfer gearset (VS) and is connectable to at least one of the plurality input elements of the main gearset (HS); the sun gear (SO_VS) of the transfer gearset (VS) is fixed on the transmission housing (GG); the first sun gear (S the longer planetary gears (P the shorter planetary gears (P the first sun gear (S the second ring gear (H the coupled carrier (ST the third sun gear (S the coupled ring gear (H