ten-steps-power transmission strand of an automatic transmission for a vehicle

摘要

The present invention represents a ten-steps-power transmission strand of an automatic transmission for a vehicle, comprising:a first planetary gear set, to which a first sun gear, which can be selectively is connected with a gear housing, a first internally geared wheel, which can be selectively connected to the gear housing, and a first planetary carrier, comprises a plurality of individual gear wheels, the between the first sun gear and the first ring gear are in engagement with each other to connect together;a second planetary gear set, which a second sun gear, which directly with the first sun gear is connected, a second planetary carrier, which is connected directly to an input shaft and, optionally, with a third sun gear is connected, and a second ring gear, which can be selectively connected with a fourth ring gear is;a third planetary gear set, the third sun gear, which can be selectively connected with the second planetary carrier, a third planetary carrier, which can be selectively is connected with the second ring gear, and a third ring gear, which can be selectively connected with the second ring gear; anda fourth planetary gear set a fourth sun gear, which directly with the third planetary carrier of the third planet-rate is connected, the fourth ring gear, which directly is connected to an output shaft, and a fourth planetary carrier, of the directly to the first planetary carrier and is connected directly to the third ring gear is connected.