Electromagnetic unit fuel injector and method for calibrating

Details Electromagnetic unit fuel injector and method for calibrating Electromagnetic unit fuel injector and method for calibrating

1983-06-27

1985-02-12

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

239 88, 239124, 403 47, F02M 4500

Patent

active

044986254

ABSTRACT:
A unit fuel injector combines an injection nozzle, a fuel pumping unit, and a solenoid valve with a mechanism for precise adjustment of the air gap size in the solenoid. Activation of the solenoid and closing of the spill port in the solenoid valve results in fuel injection from the injection nozzle. Controlling the duration and timing of the solenoid voltage pulse controls the quantity of fuel injected and injection timing, while an adjustment of the size of the solenoid air gap permits fine adjustment of the quantity of fuel injected at a given voltage pulse duration. Adjustment of the air gap size in the solenoid for the unit fuel injector uses a differential thread arrangement. Relative rotation takes place between two pairs of threads so that the accuracy of adjustment is determined by the difference between the pitches of the two pairs of threads.

REFERENCES:
patent: 1242066 (1917-10-01), Starr
patent: 2444666 (1948-07-01), Orain
patent: 3263645 (1966-08-01), Hansel
patent: 4408718 (1983-10-01), Wich

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