Patent ID: 6468177
Filing Date: 2002-10-22
Classification: F16H

Abstract:
A power train for an automotive automatic transmission, comprising:a first planetary gear having a plurality of operating elements; a second planetary gear having a plurality of operating elements, at least one of the operating elements of the second planetary gear being fixedly connected to one of the operating elements of the first planetary gear; and a plurality of clutches, brakes, and one-way clutches for variably connecting elements of the first and second planetary gears to an input shaft, a transmission housing, or to each other, wherein at least two of the clutches are arranged spaced away from each other in a radial direction of the input shaft, and the plurality of operating elements of the first planetary gear comprise a first sun gear, a first planet carrier, and a first ring gear; the plurality of operating elements of the second planetary gear comprise a second sun gear, a second planet carrier, and a second ring gear; the first planet carrier is fixedly connected to the second ring gear; the plurality of clutches comprise first, second and third clutches for variably connecting the first sun gear, the second planet carrier, and the second sun gear to the input shaft, respectively, and a fourth clutch for variable connecting the second planet carrier to the first ring gear; the plurality of brakes comprise first and second brakes for connecting the second planet carrier and the second sun gear to the transmission housing; the plurality of one-way clutches comprise first and second one-way clutches for connecting the second planet carrier to the first ring gear and the transmission housing; and the second and third clutches are the two clutches arranged spaced away from each other in a radial direction of the input shaft.