TRANSMISSÃO AUTOMÁTICA ESCALONADA E VEÍCULO COM A MESMA.

摘要

[Task] To provide a stepped automatic transmission having high energy transmission efficiency. [Means for Resolution] A first hydraulic transmission clutch 59 is engaged when the rotation speed of an input shaft 52 reaches a first rotation speed. A second hydraulic transmission clutch 70 is engaged when the rotation speed of an intermediate shaft 54 reaches a second rotation speed higher than the rotation speed of the intermediate shaft 54 when the first hydraulic transmission clutch 59 is engaged. A third power transmission mechanism 302 transmits the rotation of the intermediate shaft 54 to an output shaft 33 when the second hydraulic transmission clutch 70 is disengaged. A fourth power transmission mechanism 303 transmits the rotation of the intermediate shaft to the output shaft 33 when the second hydraulic transmission clutch 70 is engaged. The first hydraulic clutch 59 is brought into a disengaged state when hydraulic pressure is applied and into an engaged state when the hydraulic pressure is not applied.