| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stepped automatic transmission device having high energy transmission efficiency. <P>SOLUTION: A first hydraulic shift clutch 59 is connected when the rotational speed of an input shaft 52 reaches a first rotational speed. A second hydraulic shift clutch 70 is connected when the rotational speed of an intermediate shaft 54 reaches a second rotational speed highter than the rotational speed of the intermediate shaft 54 when the first hydraulic shift clutch 59 is connected. A third power transmission mechanism 302 transmits rotation of the intermediate shaft 54 to an output shaft 33 when the second hydraulic shift clutch 70 is disconnected. A fourth power transmission mechanism 303 transmits rotation of the intermediate shaft 54 to the output shaft 33 when the second hydraulic shift clutch 70 is connected. The first hydraulic clutch 59 is in a disconnection state when hydraulic pressure is applied to it and is in a connection state when hydraulic pressure is not applied to it. <P>COPYRIGHT: (C)2009,JPO&INPIT |
