Unit injector with stabilized pilot injection

Details Unit injector with stabilized pilot injection Unit injector with stabilized pilot injection

2005-06-21

2005-06-21

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

C239S088000, C239S091000, C239S092000, C239S124000, C239S533200, C123S446000

Reexamination Certificate

active

06908040

ABSTRACT:
A unit injector assembly is provided that helps to ensure maximum injection flow while minimizing the harmful affects of pressure waves within the unit injector assembly. The unit injector assembly has a first fuel passageway extending from the plunger piston pumping chamber to the tip check stem injection chamber and valve seat. The unit injector assembly has a second fuel passageway extending from the tip check stem injection chamber to a fuel control valve assembly. A flow restricting fuel passageway connects one of the pumping chamber and the first fuel passageway with the second fuel passageway and acts to minimize cavitation at the valve seat and effectively eliminates pressure waves within the unit injector assembly.

REFERENCES:
patent: 4129255 (1978-12-01), Bader et al.
patent: 4396151 (1983-08-01), Kato et al.
patent: 4653448 (1987-03-01), Ohmori et al.
patent: 5494220 (1996-02-01), Shinogle et al.

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