TRANSMISSÃO AUTOMÁTICA ESCALONADA E VEÍCULO COM A MESMA.

摘要

[Problem] To provide a stepped automatic transmission that allows smooth shift change and has a simple structure. [Means for Resolution] A first hydraulic clutch 70 becomes in an engaged state at a first shift and a disengaged state at a second shift. A second hydraulic clutch 66 becomes in an engaged state at the second shift and a disengaged state at the first shift. The first hydraulic clutch 70 includes a first working chamber 137. The second hydraulic clutch 66 includes a second working chamber 133. In the first working chamber 137 and the second working chamber 133, hydraulic release paths 70a and 66a having no valves are provided, respectively.