| 摘要 |
<p>PURPOSE:To lock a piston by pressure oil so as to attempt prevention of output fluctuation, by connecting a side house with a small pressure reception area to an oil pressure source through the first electromagnetic valve, a big side house to a tank through the third electromagnetic valve and both side house to each other through the second electromagnetic valve, with the piston of an actuator placed between these houses. CONSTITUTION:In order to make control from an engagement condition to a disengagement of a clutch 3, the first and the second electromagnetic valve 21 and 25 are excited to be open and close, respectively and the third electromagnetic valve 23 is left as opened. Then, pressure oil flows into a side house 16 with a small pressure reception area of a clutch actuator 11, moves a piston 13 to the left and the clutch is released. In this case, the control speed corresponds to fast feed and it can be slowed or infinitely slowed as required. Next in order to make control from the disengagement condition to the engagement of the clutch 3, the electromagnetic valve 21 is excited to be opened, the electromagnetic valve 25 is unexcited to be opened and the electromagnetic valve 23 is excited to be closed. Thus, as the same pressure works on both sides of the piston 13, pressure oil flows out of the house 16 because of the difference of the pressure reception area, flows into the house 17 and operates the piston 13 to the right to let the clutch in. Accordingly, even if fluctuation occurs from the clutch side, output fluctuation does not occur.</p> |
