Fluid sprinkling – spraying – and diffusing – Processes – Of fuel injection
Reexamination Certificate
2006-03-07
2006-03-07
Ganey, Steven J. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Processes
Of fuel injection
C239S088000, C239S090000, C239S096000, C239S124000, C239S127000, C239S533900, C123S090120, C251S057000
Reexamination Certificate
active
07007860
ABSTRACT:
A fuel injector in an engine includes a spring cavity, a piston, a plunger, a spring, a fuel cavity, and a stop plate. The piston is hydraulically controlled to force the plunger down to compress fuel in the fuel cavity. However, under certain conditions, the plunger can contact the stop plate and/or the spring can become overcompressed. Both of these conditions can cause damage to the fuel injector. The present invention locates a pressure equalization channel in such a way as to dampen the motion of the piston to prevent this damage to the fuel injector.
REFERENCES:
patent: 4437644 (1984-03-01), Wilmers
patent: 5265804 (1993-11-01), Brunel
patent: 5299738 (1994-04-01), Genter et al.
patent: 6047899 (2000-04-01), Graves
patent: 6412705 (2002-07-01), Desai et al.
patent: 6631853 (2003-10-01), Lenk et al.
patent: 6663014 (2003-12-01), Depayva et al.
Dongming Tan
McClure Thomas R.
Schuricht Scott R.
Yongxin Wang
Caterpillar Inc.
Ganey Steven J.
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