Patent ID: 9429215
Filing Date: 2016-08-30
CPC Classification: F16H

Claim Text:
1. A multi-stage auto transmission for a vehicle, comprising: first, second, third and fourth planetary gear sets, wherein each of the first, second, third, and fourth planetary gear sets includes first, second and third rotating elements; friction members comprising first, second and third clutches and first, second and third brakes; an input shaft to which rotation power is inputted; and an output shaft from which the rotation power is outputted, wherein the first rotating element of the first planetary gear set is selectively connected to the input shaft through the first clutch and continuously connected to the first rotating element of the second planetary gear set wherein the first rotating element of the first planetary gear set is connected to the first brake, the second rotating element of the first planetary gear set is selectively connected to the second rotating element of the second planetary gear set through the third clutch wherein the second rotating element of the first planetary gear set is connected to the second brake, and the third rotating element of the first planetary gear set is continuously connected to the second rotating element of the fourth planetary gear set, the first rotating element of the second planetary gear set is continuously connected to the first rotating element of the first planetary gear set, the second rotating element of the second planetary gear set is selectively connected to the third rotating element of the third planetary gear set through the second clutch, and the third rotating element of the second planetary gear set is continuously connected to the input shaft, the first rotating element of the third planetary gear set is continuously connected to the first rotating element of the fourth planetary gear set and connected to the third brake, the second rotating element of the third planetary gear set is continuously connected to the third rotating element of the fourth planetary gear set and continuously connected to the output shaft, and the third rotating element of the third planetary gear set is selectively connected to the second rotating element of the second planetary gear set through the second clutch, and the first rotating element of the fourth planetary gear set is continuously connected to the first rotating element of the third planetary gear set and connected to the third brake, the second rotating element of the fourth planetary gear set is continuously connected to the third rotating element of the first planetary gear set, and the third rotating element of the fourth planetary gear set is continuously connected to the second rotating element of the third planetary gear set.