Fluid-braked electromagnetic actuator

Details Fluid-braked electromagnetic actuator Fluid-braked electromagnetic actuator

1998-03-02

2000-08-15

Kamen, Noah P.

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

25112901, 335240, F01L 904

Patent

active

061019925

ABSTRACT:
An electromagnetic actuator includes an electromagnet having a pole face, an energized state for generating an electromagnetic force and a de-energized state; and an armature movable towards and away from the pole face in a travel path extending from a first end position remote from the pole face to a second end position at the pole face. The armature assumes the second end position in the energized state of the electromagnet. A return spring urges the armature away from the pole face and toward the first end position. Further, a fluid damping unit is provided for braking a motion of the armature along a terminal portion of its travel path shortly before its arrival into at least one of the end positions for effecting a soft arrival of the armature into such end position.

REFERENCES:
patent: 5832883 (1998-11-01), Bae

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