Patent attributes
A vehicular multi-stage transmission includes: input and output shafts; first, second, third and fourth planetary gear devices each including first, second and third rotary elements; and seven shifting elements connected to the rotary elements of the four planetary gear devices. In particular, the second rotary element of the first planetary gear device PG1 is selectively connected to a transmission case by a first shifting element while being selectively connected to the input shaft, and the secondary rotary element of the first planetary gear device is selectively connected to the third rotary element of the second planetary gear device, the first rotary element of the third planetary gear device, and the first rotary element of the fourth planetary gear device. In addition, the third rotary element of the first planetary gear device is fixedly connected to the second rotary element of the second planetary gear device.
