Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Reexamination Certificate
2011-07-19
2011-07-19
Denion, Thomas E (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
C029S888410, C251S129160, C335S256000, C335S262000
Reexamination Certificate
active
07980209
ABSTRACT:
An internal combustion engine includes an electromagnetic valve actuator having an armature between upper and lower electromagnets with a stem extending through one electromagnet and guided by a bushing with increased clearance about at least a portion of the inner circumference in at least a middle portion of the bushing to reduce oil shear length and associated viscous friction in the actuator. A two-piece intake/exhaust valve guide includes a lower half with a stepped outer diameter cooperating with a counter-bored hole in the cylinder head to provide a positive stop. The upper and lower halves of the valve guide have increased clearance relative to the valve stem around at least a portion of the inner circumference to reduce oil shear length and associated viscous friction. Reducing viscous friction of the actuator and associated valve guide improves system robustness by decreasing the system sensitivity to temperature.
REFERENCES:
patent: 1784555 (1930-12-01), Summers
patent: 1972650 (1934-09-01), Gassaway et al.
patent: 2722925 (1955-11-01), McElhinney
patent: 3037494 (1962-06-01), Kirkpatrick et al.
patent: 3809046 (1974-05-01), Kammeraad
patent: 4442998 (1984-04-01), Ohyama et al.
patent: 4465040 (1984-08-01), Pelizzoni
patent: 4558293 (1985-12-01), Haneda et al.
patent: 5873337 (1999-02-01), Binford
patent: 5904125 (1999-05-01), Enright et al.
patent: 6116570 (2000-09-01), Bulgatz et al.
patent: 6125810 (2000-10-01), Haselkorn
patent: 6279524 (2001-08-01), Schebitz
patent: 6321700 (2001-11-01), Hein et al.
patent: 6371063 (2002-04-01), Oyama et al.
patent: 6477994 (2002-11-01), Umemoto et al.
patent: 6655657 (2003-12-01), Bircann
patent: 6675751 (2004-01-01), Megli et al.
patent: 6732684 (2004-05-01), Onohara et al.
patent: 6763789 (2004-07-01), Liang et al.
patent: 6845300 (2005-01-01), Haghgooie et al.
patent: 6871617 (2005-03-01), Winstead et al.
patent: 6997433 (2006-02-01), Koneda et al.
patent: 7124720 (2006-10-01), Liang et al.
patent: 7314026 (2008-01-01), Koneda et al.
patent: 2006/0208842 (2006-09-01), Maerky et al.
patent: 2007/0097589 (2007-05-01), Maerky
patent: 2007/0199526 (2007-08-01), Volz
patent: 2007093692 (2007-08-01), None
Corey Neal James
Koneda Philip Thomas
Megli Thomas William
Wang Yan
Bernstein Daniel A
Brooks & Kushman P.C.
Denion Thomas E
Ford Global Technologies LLC
Voutryas Julia
LandOfFree
Electromagnetic valve actuator and valve guide having... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic valve actuator and valve guide having..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic valve actuator and valve guide having... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2636268