| 摘要 |
A solenoid valve for controlling pneumatic vacuum or pressure comprising a body having a bore. A first passage intersects one end of the bore. The bore defines a first seat adjacent the one end. The body has a second passage intersecting the bore intermediate its ends and a third passage. A coil surrounds a core. The core has a fourth passage therethrough with a second seat at one end. A tube provides communication between the other end of the fourth passage and the third passage. A single plunger is provided in the bore and has a first valve at one end adapted to engage the first seat and a second valve at the other end adapted to engage the second seat.
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