Patent ID: 6135912
Filing Date: 2000-10-24
Classification: F16H,Y10T

Abstract:
An automatic transmission for a vehicle automatically establishing multiple gear ratios by selectively inputting a plurality of input rotations to a planetary gear set, comprising:a first clutch and a third clutch, which are connected through a reduction planetary gear to an input shaft and which input a decelerated rotation to the planetary gear set; anda second clutch which is directly connected to the input shaft and which inputs non-decelerated rotation to the planetary gear set, wherein one element of the reduction planetary gear is arranged and fixed on the end of a boss portion extended from a case wall of the transmission, the hydraulic servos of the first clutch and the third clutch are arranged on the boss portion, the hydraulic servo of the second clutch is arranged at the opposite side of the reduction planetary gear from the hydraulic servos of the first and third clutches, and hydraulic paths for applying hydraulic pressures to the hydraulic servos of the first and third clutches are formed in the boss portion.