Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Patent
1996-11-12
1998-03-24
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
25112901, 25112916, 25112918, F01L 904
Patent
active
057300917
ABSTRACT:
An electromechanically actuated valve (12) for use as an intake or exhaust valve in an internal combustion engine. The valve (12) is actuated by a electromechanical actuator assembly (18) which includes a first electromagnet (22), second electromagnet (30) and third electromagnet (32). A first disk (38) is slidably mounted to the valve (12) in a gap between the first and second electromagnets with first and second stop members (39, 41) limiting its travel along the valve stem (15). A third spring (52) biases the first disk (38) toward the first stop (39). The gap between the first and second stops (39, 41) is large enough to allow for manufacturing tolerances and temperature changes, with a third spring (52) acting to create soft landings. A second disk (44) is slidably mounted to the valve (12) above the third electromagnet (32) with a third stop member (40) limiting its travel toward the first disk (38). With the valve (12) being in a closed position, the gap between the first disk (38) and the first electromagnet (22) is greater than the gap between the second disk (44) and third electromagnet (32), allowing for multiple valve lifts. A first spring (48), mounted between the cylinder head (14) and first disk (38), and a second spring (50), mounted between the second disk (44) and an actuator housing (20), create an oscillatory system which drives the valve movement during engine operation, thus reducing power requirements to actuate the valves.
REFERENCES:
patent: 4455543 (1984-06-01), Pischinger et al.
patent: 4515343 (1985-05-01), Pischinger et al.
patent: 4682574 (1987-07-01), Kreuter
patent: 4715330 (1987-12-01), Buchl
patent: 4715332 (1987-12-01), Kreuter
patent: 4719882 (1988-01-01), Kreuter
patent: 4777915 (1988-10-01), Bonvallet
patent: 4831973 (1989-05-01), Richeson, Jr.
patent: 5070826 (1991-12-01), Kawamura
patent: 5074259 (1991-12-01), Pusic
patent: 5095856 (1992-03-01), Kawamura
patent: 5115772 (1992-05-01), Kawamura
patent: 5131624 (1992-07-01), Kreuter et al.
patent: 5222714 (1993-06-01), Morinigo et al.
Diehl Roy Edward
Liang Feng
Miller John Michael
Stephan Craig Hammann
Xu Xingyi
Ford Global Technologies Inc.
Lo Weilun
Wilkinson Donald A.
LandOfFree
Soft landing electromechanically actuated engine valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Soft landing electromechanically actuated engine valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft landing electromechanically actuated engine valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2281823