| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary gear train of an automatic transmission capable of reducing fuel consumption by shortening the total length, and improving mountability and power transmission performance.SOLUTION: A planetary gear train of an automatic transmission for a vehicle includes: a first planetary gear set PG1 having a first shaft which receives power transmission, a second shaft in parallel with the first shaft, a first sun gear S1 disposed on the first shaft as a selective output or fixed element, a first planetary carrier PC1 as a selective output element, and a first ring gear R1 directly connected to the first shaft as a rotary element NF; a PG2 having an S2 disposed on the second shaft and connected to the PC1 through a circumscribing gear TF, and an R2 selectively connected to the PC2, PC1 and R1 through the TF as the NF; a PG3 having an S3 disposed on the second shaft and connected to the R2, a PC3 selectively connected to the PC2, and directly connected to an output gear as an output element, and an R3 selectively connected to the S1 through the TF as the NF; three transfer gears forming the TF; and a frictional element selectively connecting NFs of the PG1, PG2 and PG3 with each other or selectively connecting them to a housing. |
