| 摘要 |
<P>PROBLEM TO BE SOLVED: To make a hydraulic control device compact by reducing the number of shaft holes while keeping functions of a fail-safe valve and a damper valve. <P>SOLUTION: A damper/fail-safe valve 61 arranged in a first pilot oil passage 5 is displaced toward one side of axial direction by drive hydraulic pressure generated in the first pilot oil passage 5, and provides a damper spool 62 displaced toward the other side of the axial direction by drive hydraulic pressure generated in a second pressure regulation oil passage 7. And then, pressure pulsation generated in the first pilot oil passage 5 is eased in such a way that the damper spool 62 is displaced. Furthermore, when drive hydraulic pressure is generated in the second pressure regulation passage 7, double engagement is prevented by intercepting the first pilot oil passage 5 in such a way that the damper spool 62 is displaced toward the other side by the drive hydraulic pressure generated in the second pressure regulation oil passage 7. Additionally, since this damper/fail-safe valve 61 is sufficient to have only one hole of the damper shaft holes 63, a physique of the hydraulic control device can be made compact. <P>COPYRIGHT: (C)2008,JPO&INPIT |
