Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1996-03-22
1997-04-29
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9043, 123198F, F01L 1300, F01L 118
Patent
active
056238975
ABSTRACT:
A valve control system for an internal combustion engine which does not require synchronization with the engine rotation is disclosed. The system includes an actuator having a coil electrically energized by a control unit causing a stator to magnetically attract an armature where the armature is coupled to a plunger by an actuator spring. The plunger pushes against a pivoted actuator arm having an inner and outer housing which are biased into extension by an arm spring. The actuator arm contacts and forces a slidable latch member into an inactive position and a latch spring returns the latch member into an active position. The system includes an outer rocker arm which is engageable with an engine poppet valve, and an inner rocker arm which is engageable with a cam lobe and the latch member which rotatably links and unlinks the inner and outer rocker arms. The system is adapted wherein the engine poppet valve remains closed when the inner and outer rocker arms are unlinked when the latch member is in the inactive position and wherein the engine poppet valve opens and closes in response to the cam lobe when the inner and outer rocker arms are rotatably linked when the latch member is in the active position. In an alternate embodiment, the plunger contacts a first arm of a pivoted bellcrank and a second arm contacts the latch member.
REFERENCES:
patent: 4151817 (1979-05-01), Mueller
patent: 4203397 (1980-05-01), Soeters, Jr.
patent: 5445116 (1995-08-01), Hara
patent: 5513602 (1996-05-01), Hannibal
patent: 5524580 (1996-06-01), Muir
patent: 5529033 (1996-06-01), Hampton
patent: 5544626 (1996-08-01), Diggs et al.
Hampton Keith
Preston David M.
Eaton Corporation
Lo Weilun
Uthoff Jr. Loren H.
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