Dampening stop pin

Details Dampening stop pin Dampening stop pin

2011-03-08

2011-03-08

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

Reexamination Certificate

active

07900604

ABSTRACT:
A dampening stop pin that reduces a needle velocity at the time when the needle valve of a fuel injector is about to be seated in a closed position. A gap between a bottom surface of the stop-pin flange and a sealing seat of a nozzle is provided to compress the fuel trapped therein to form a fuel cushion that dampens the closing motion of the needle. Moreover, a diametrical clearance between an outer circumferential edge of the flange and an inner surface of a needle spring cage must be sized to prevent undesired high pressure from building up in the gap by venting a quantity of compressed fuel while still permitting the fuel cushion to dampen the closing force of the needle.

REFERENCES:
patent: 2985378 (1961-05-01), Falberg
patent: 3257078 (1966-06-01), Mekkes
patent: 3464627 (1969-09-01), Huber
patent: 3831863 (1974-08-01), Fenne
patent: 3958757 (1976-05-01), Happel et al.
patent: 4448169 (1984-05-01), Badgley et al.
patent: 4566635 (1986-01-01), Trachte
patent: 4715542 (1987-12-01), Morell et al.
patent: 4878650 (1989-11-01), Daly et al.
patent: 5125580 (1992-06-01), Kornberger
patent: 5429309 (1995-07-01), Stockner
patent: 5551391 (1996-09-01), Beck et al.
patent: 5626294 (1997-05-01), McCandless
patent: 5632444 (1997-05-01), Camplin et al.
patent: 5645224 (1997-07-01), Koch
patent: 5655716 (1997-08-01), Mathis
patent: 5692683 (1997-12-01), Mathis
patent: 5826802 (1998-10-01), Anderson et al.
patent: 5868317 (1999-02-01), English
patent: 5893516 (1999-04-01), Harcombe et al.
patent: 5950931 (1999-09-01), Beatty et al.
patent: 5992767 (1999-11-01), Phillips et al.
patent: 6062497 (2000-05-01), Bryan
patent: 6092744 (2000-07-01), Youakim
patent: 6109536 (2000-08-01), English
patent: 6113000 (2000-09-01), Tian
patent: 6113012 (2000-09-01), Wear et al.
patent: 6119962 (2000-09-01), Youakim et al.
patent: 6257203 (2001-07-01), Lei
patent: 6290148 (2001-09-01), Rizk et al.
patent: 6318646 (2001-11-01), Mattioli et al.
patent: 6390385 (2002-05-01), Hardy et al.
patent: 6412704 (2002-07-01), Shinogle et al.
patent: 6499467 (2002-12-01), Morris et al.
patent: 6536413 (2003-03-01), Mori
patent: 6543706 (2003-04-01), Hutchings et al.
patent: 6575388 (2003-06-01), Aota et al.
patent: 6745993 (2004-06-01), Mueller
patent: 6793161 (2004-09-01), Fujita et al.
patent: 6830201 (2004-12-01), Seelbach
patent: 6840458 (2005-01-01), Kuzuyama
patent: 6874704 (2005-04-01), Mack et al.
patent: 6889661 (2005-05-01), Duplat et al.
patent: 2003/0066509 (2003-04-01), Shafer et al.
patent: 2003/0172910 (2003-09-01), Mattes et al.
patent: 2003/0189112 (2003-10-01), Fukutomi et al.
patent: 2004/0011888 (2004-01-01), Seelbach et al.
patent: 2004/0011893 (2004-01-01), Heine et al.
patent: 2004/0050973 (2004-03-01), Yang et al.
patent: 2005/0173564 (2005-08-01), Cooke
Dr. Steven D. Phillips, Dimensional Metrology Program, Dec. 8, 2008, National Institute of Standards and Technology (NIST), p. 1(Description).
Dr. L.M. Linares, Impact of Geometric Uncertainties Onto the Operating Performance of a Mechanical System, Apr. 10-12, 2005, 2005, Selected Conference Papers from the 9th CIRP International Seminar at Arizona State University, p. 1.
Dr. Joseph K. Davidson, Impact of Geometric Uncertainties Onto the Operating Performance of a Mechanical System, May 19, 2007, Springer Netherlands, pp. 225-234; Website: http://www.springerlink.com/content/pl675687568w15g1/.
Dr. Jun Qu, Development of Cylindrical Wire Electrical Discharge Machining Process and Investigation of Surface Integrity and Mechanical Property of EDM Surface Layers, 2002, North Carolina State University, pp. 22, 27, and 31.

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