Method for adjusting injection ports in a fuel injection valve

Details Method for adjusting injection ports in a fuel injection valve Method for adjusting injection ports in a fuel injection valve

1989-12-14

1990-08-28

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Valve or choke making

2989012, 29407, 51411, 51415, 2395333, B21D 5300

Patent

active

049513729

ABSTRACT:
A fuel injection valve and a method for adjusting its fuel quantity are proposed. The fuel injection valve is used to inject fuel into the intake system of a mixture-compressing internal combustion engine having externally supplied ignition. It has a valve needle, which when a magnetic coil is excited is attracted toward a core by an armature connected to the valve needle, whereupon the valve needle with a sealing seat formed on it, lifts away from a valve seat face embodied on a nozzle body. According to the invention, the nozzle body is closed off by a bottom embodied in the form of a small plate, which is part of the nozzle body and in which a plurality of calibrated injection ports are located. The closure of the valve needle is embodied by a tang, which extends as far as the immediate vicinity of the bottom. The injection ports are produced by erosion thereof, while their calibration for the sake of static fuel quantity adaptation is performed by hydraulic grinding with a flowable grinding medium.

REFERENCES:
patent: 2970467 (1971-02-01), Pettibone
patent: 3608171 (1971-09-01), Strodtmann
patent: 4069978 (1978-01-01), El Moussa
patent: 4481699 (1984-11-01), Knapp et al.
patent: 4586226 (1986-05-01), Fakler et al.
patent: 4646975 (1987-03-01), Horn
patent: 4688312 (1987-08-01), Sasao et al.

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