| 摘要 |
A multi-step valve, especially an electromagnetic valve (14), has an actuating element (solenoid plunger 13) that has at least three defined positions and a closure member (6) which follows the actuating element, which closure member closes the valve in the first position, allows limited flow in the second position and opens the valve fully in the third position. The closure member (6) has a valve disk which co-operates with a valve seat (4) fixed relative to the housing and, in the transition from the second position to the third position, the closure member entrains, from an active position to an inactive position, an aperture member (7) which delimits a flow-determining aperture (8) of fixed dimension. In that manner, the flow rate in the second position can be limited very precisely. |
