| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automatic transmission for a vehicle capable of reducing the number of friction engagement elements causing dragging in a release state.SOLUTION: An automatic transmission for a vehicle includes a first planetary gear set 1 having four rotary elements, and a second planetary gear set 2 having three rotary elements. These rotary elements are arranged on a common velocity diagram according to intervals corresponding to gear ratios of the first and second planetary gear sets to be applied as a first element to a seventh element. An input shaft I is constantly connected to a second element 15, and an output member 9 is constantly connected to a sixth element. A first element 11 is connectable to a fifth element 21 by a first clutch 3, and fixable to a stationary portion 8 by a first brake 6, a third element 12 is connectable to a seventh element 22 by a second clutch 4, a fourth element 16 is connectable to the fifth element 21 by a third clutch 5, and the seventh element 22 is fixable by a second brake 7.</p> |
