| 摘要 |
PROBLEM TO BE SOLVED: To secure torque capacity of two clutches for inputting deceleration rotation by increasing diameters of the clutches to prevent enlarging of size and weight caused by increase of a shaft length, in an automatic transmission for a vehicle of a gear train accomplishing multiple stages. SOLUTION: This automatic transmission includes a deceleration planetary gear G1, two clutches C-1, C-3 for transmitting its deceleration rotation, and a planetary gear set G having two elements S2, S3 into which the deceleration rotation through the clutches C-1, C-3 is inputted. The deceleration planetary gear G1 and the two clutches C-1, C-3 are disposed on one side of the planetary gear set G such that the clutch C-3 is located on the planetary gear set side to the clutch C-1. An input side member of the clutch C-1 is connected to an output element C1 of the deceleration planetary gear G1 and to an input side member of the clutch C-3, while an output side member of the clutch C-1 is connected to one of the two elements S2, S3 of the planetary gear set G through the inner circumference of the clutch C-3. Thereby, a member passing periphery sides of both the clutches C-1, C-3 is eliminated to increase diameters of both the clutches C-1, C-2.
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