Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1998-09-03
2000-07-04
Lo, Wellun
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
123 9067, 12318813, 25112916, 73119R, 335258, F01L 904
Patent
active
060823151
ABSTRACT:
An electromagnetic valve actuator is disclosed. The actuator includes an upper electromagnet and a lower electromagnet placed in a mirror relationship to each other about a central vertical axis, an armature element disposed intermediate the upper and lower electromagnets, the armature element having a normally biased initial first position between the upper and lower electromagnets when the electromagnets are off, a second fixed open position proximal the lower electromagnet when the lower electromagnet is energized, and a third fixed closed position proximal the upper electromagnet when the upper electromagnet is energized, an armature shaft attached to the armature element and extending vertically through a channel in the lower electromagnet, an upper spring retainer assembled onto the armature shaft, an upper spring disposed between the lower electromagnet and the upper spring retainer, the upper spring biasing the armature element in the first position when the electromagnets are off and accelerating the armature element toward the lower electromagnet when the valve is opened, a valve stem in a collinear relationship to the armature shaft, a valve spring retainer assembled onto the valve stem, a valve spring disposed between the cylinder head and the valve spring retainer, the valve spring biasing the armature element in the first position when the electromagnets are off and accelerating the armature element toward the upper electromagnet when the valve is closed.
REFERENCES:
patent: 2863432 (1958-12-01), O'Brien
patent: 5069422 (1991-12-01), Kawamura
patent: 5596956 (1997-01-01), Ogawa et al.
patent: 5769043 (1998-06-01), Nitkiewicz
patent: 5785016 (1998-07-01), Enderle et al.
patent: 5887553 (1999-03-01), Ballmann et al.
Aura Systems, Inc.
Lo Wellun
LandOfFree
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