| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an interlock caused by a secondary trouble of a linear solenoid valve for controlling a control valve, and to improve safety of a hydraulic control unit. <P>SOLUTION: The hydraulic control unit comprises: the third control valve 24 for controlling connection and disconnection of a third friction clutch C3 by controlling hydraulic pressure, a second accumulator 62 for lessening hydraulic shocks on the third friction clutch C3; and the fourth control valve 25 for controlling connection and disconnection of a first friction brake B1 (generating an interlock when the first friction brake is connected together with the third friction clutch C3) by the controlling hydraulic pressure. The second accumulator 62 outputs hydraulic pressure applied from an oil passage different from the third control valve 24 when a piston completes a predetermined stroke by the controlling hydraulic pressure entered from the third control valve 24. The fourth control valve 25 is switched so as not to generate the controlling hydraulic pressure when the hydraulic pressure outputted from the second accumulator 62 is applied. <P>COPYRIGHT: (C)2007,JPO&INPIT |
