Patent ID: 9644711
Date: 2017-05-09
CPC Classifications: F16H

Claim:
1. An automotive multistage transmission comprising: an input shaft and an output shaft; a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set each including three rotary members and transmitting torque between the input shaft and the output shaft; and at least six shifting members connected to the rotary members of the planetary gear sets, wherein in the first planetary gear set, a first rotary member is continuously connected to the input shaft, a second rotary member is fixable to at least one of the shifting members and is selectively connected to a third rotary member of the fourth planetary gear set, and a third rotary member is continuously connected to a second rotary member of the second planetary gear set; in the second planetary gear set, a first rotary member is continuously fixed, the second rotary member is selectively connected to a first rotary member of the third planetary gear set, and a third rotary member is selectively connected to the first rotary member of the third planetary gear set and to a first rotary member of the fourth planetary gear set; and in the third planetary gear set, a second rotary member is continuously connected to a second rotary member of the fourth planetary gear set and to the output shaft, a third rotary member is continuously connected to the input shaft and is selectively connected to the third rotary member of the fourth planetary gear set.