| 摘要 |
<p>The control has a pre-control slide, and a main control slide, moved between two end positions in a control chamber. There is a throttle in the connection between control chamber and inlet, and chamber and return. Actuation of the control causes a pressure change, and dependent upon that, the main slide controls the flow resistance in the circuit. To prevent blocking of the throttles, a connection (51) is provided extending from the inlet to the control chamber, and parallel to the second throttle (48). The connection contains a third throttle (49), which is adjusted by the main control slide (39).</p> |
