VALVE DEVICE FOR A HYDRAULIC CIRCUIT, AND OIL PUMP CONTROL ASSEMBLY
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United States of America Patent
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Issued Date -
May 21, 2015
app pub date -
Apr 29, 2013
filing date -
May 23, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A valve device for a hydraulic circuit includes an actuator unit and a valve unit. The actuator unit comprises a spring element and an electromagnetic circuit. The electromagnetic circuit comprises an armature, a core comprising a passage hole, a coil, and a flux-guiding device. A stop element comprising a passage opening is arranged in the passage hole so that a gap exists between the core and the armature when actuating the actuator unit. The valve unit comprises a first opening, a second opening, a third opening formed opposite the actuator unit, a first valve seat between the first and second opening, a second valve seat formed between the first and third opening, a first valve closure body connected to the armature and loaded by the spring element, and a second valve closing body loaded by hydraulic pressure and lifted from the second valve seat by the first valve closure body.
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