| 摘要 |
<p>The pre-control valve for hydraulic systems has a main valve body, controlling the connection between a supply and an outlet, and biased in closing direction by a spring. The spring is positioned in a pressure chamber, which may be connected to the outlet via the pre-control valve, forming a second throttle point. The connection between first and second throttle point (31, 40) contains a third throttle point (28). The connection to the pressure chamber (22) from the connection from the supply (16) to the pre-control valve (40) branches-off between first and third throttle. The connection from supply to pressure chamber has a fourth throttle point (33) behind and parallel to the third throttle point.</p> |
