| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic transmission device including three planetary gear mechanisms, four clutches, and two brakes, while reducing a dragging loss to improve transmission efficiency of the device.SOLUTION: A sun gear 11 of a first planetary gear mechanism 10 is connected to a carrier 32 of a third planetary gear mechanism 30 by a first connection element 51. A carrier 12 is connected to a ring gear 22 of a second planetary gear mechanism 20 by a second connection element 52. A carrier 23 of the second planetary gear mechanism 20 is connected to a ring gear 33 of the third planetary gear mechanism 30 by a third connection element 53. An input shaft 3 is connected to a sun gear 31 of the third planetary gear mechanism 30 and the carrier 12 of the first planetary gear mechanism 10 through clutches C1 and C4. An output gear 4 is connected to the ring gear 13 of the first planetary gear mechanism 10. Three of the clutches C1-C4 and brakes B1 and B2 are engaged together while the other three are released, thereby forming a forward first gear position to a forward eighth speed gear position as well as a reverse gear position. |
