Unit injector optimized for reduced exhaust emissions

Details Unit injector optimized for reduced exhaust emissions Unit injector optimized for reduced exhaust emissions

1994-09-20

1995-11-21

Merritt, Karen B.

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

2395333, F02M 4700, F02M 6500

Patent

active

054679249

ABSTRACT:
A diesel unit injector of the EMD type is provided with a tip whose radius is centered below the center of radius of the sac which it encloses, and the sac volume is minimized. The lower face of the nozzle body of the injector is faired in such a manner as to maintain a strong wall cross-section. A system utilizing a set of potential substitute spring seats is used to reset the opening pressure, as upon rebuilding, within narrow tolerances. The nozzle body is shortened and the check valve cage correspondingly lengthened to reduce the length of the injector valve proper. Trapped volume is reduced consistently with fuel flow requirements.

REFERENCES:
patent: 3006556 (1961-10-01), Shade et al.
patent: 4317541 (1982-03-01), Beardmore
patent: 4801095 (1989-01-01), Banzhaf et al.
patent: 5333786 (1994-08-01), Gant et al.

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