| 摘要 |
<p>A solenoid-operated valve comprises an inlet valve member 8 which closes in response to fluid pressure at an inlet port A. A venting valve member 16 is disposed relative to the inlet valve member 8 so that closure of either valve member lifts the other. The valve includes at least one coil 28, 29 within which is a tubular assembly that forms a chamber with an operating space for the venting valve member 16 and contains an armature 20 for striking a rear part of the venting valve member 16 when the coil is energized. The chamber includes a flux tube 32 which provides a path for magnetic flux in parallel with the armature 20, the flux tube 32 terminating before a region where the armature 20 strikes the rear part of the venting valve member 16. A non-magnetic ring 33 surrounds this region so that the density of the magnetic flux is increased in this region to increase the force with which the armature 20 can strike the rear part of the venting valve member 16.</p> |
