PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLE

摘要

A planetary gear train of an automatic transmission may include: a first shaft; a second shaft parallel with the first shaft; a first gear set on the first shaft including a first element selectively connected to the first shaft, a second element selectively connected to the first shaft and a transmission housing, and a third element; a second gear set on the second shaft including a fourth element operably connected to the first element and selectively connected to the first shaft, a fifth element connected to the third element and directly connected to an output gear, and a sixth element selectively connected to the first shaft and selectively connected to the housing; three transfer gears; and frictional elements including clutches selectively connecting the first shaft to elements of the first and second gear sets and brakes selectively connecting elements of the first and second gear sets to the housing.

主权项

1. A planetary gear train of an automatic transmission for a vehicle comprising:
a first shaft receiving torque of an engine; a second shaft disposed in parallel with the first shaft at a predetermined distance; a first planetary gear set on the first shaft, and including a first rotation element selectively connected to the first shaft, a second rotation element selectively connected to the first shaft and selectively connected to a transmission housing, and a third rotation element; a second planetary gear set on the second shaft, and including a fourth rotation element connected to the first rotation element through an externally-meshed gear and selectively connected to the first shaft through an externally-meshed gear, a fifth rotation element connected to the third rotation element through an externally-meshed gear and directly connected to an output gear, and a sixth rotation element selectively connected to the first shaft through an externally-meshed gear and selectively connected to the transmission housing; three transfer gears forming the respective externally-meshed gears; and frictional elements including clutches selectively connecting the first shaft to rotation elements of the first and second planetary gear sets and brakes selectively connecting rotation elements of the first and second planetary gear sets to the transmission housing.