| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide inching valve structure enabling highly reliable control with respect to temperature compensation with simple structure. <P>SOLUTION: In this inching valve structure, a flow rate of hydraulic fluid supplied to a forward clutch or a reverse clutch is controlled by controlling the position of an inching piston 7 based on an electrical control signal. A positioning motor 12 is provided which linearly operates with respect to the axial direction of the inching piston 7 based the control signal. The positioning motor 12 is directly coupled to one end surface on a side opposite to an inching spring abutting surface in the inching piston 7, and the pressing force of an inching spring 13 is adjusted according to the position of the piston set by the positioning motor 12, thereby controlling the flow rate of the hydraulic fluid and regulating pressure of the hydraulic fluid. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
