| 摘要 |
An electrohydraulic assembly for actuating a moveable control element is provided. A valve body has two fluid ports, and a central bore. A core is disposed in spaced proximity from the valve body. An armature is rectilinearly translatable between first and second positions relative to the core. First and second electromagnetic coils produce respective electromagnetic forces in response to being energized to cause the rectilinear movement of the armature. A linearly shiftable spool is rigidly connected to the armature. The armature movement causes the spool to displace, which controls fluid flow for actuating the control element. First and second springs provide respective biasing forces to the armature to assist the rectilinear movement of the armature upon the appropriate energization of either of the electromagnetic coils. Advantageously, the retentivity of the core, armature and valve body causes a high latching force to latch the armature at either of the armature positions in response to a respective electromagnetic coil being de-energized.
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