| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automatic transmission for a vehicle having wider ratio coverage with a proper step ratio.SOLUTION: An automatic transmission for a vehicle includes a first planetary gear group 1 having three rotary elements, and a second planetary gear group 2 having four 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 groups to be applied as a first element to a seventh element. An input shaft I is constantly connected to a first element 11 and connectable to a fifth element 25 by a first clutch 3, an output member 9 is constantly connected to a sixth element 22, a third element 15 is fixable to a stationary portion 8 by engagement of a first brake 5, and connectable to a fourth element 26 by a second clutch 4, a second element 12 is fixable to the stationary portion 8 by a second brake 6, and constantly connected to a seventh element 21, and a fifth element 25 is fixable to the stationary portion 8 by a third brake 7.</p> |
