Fuel injector stroke calibration through dissolving shim

Details Fuel injector stroke calibration through dissolving shim Fuel injector stroke calibration through dissolving shim

1993-08-19

1994-03-22

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

2395851, 25112918, B05B 130, F02M 5106

Patent

active

052956270

ABSTRACT:
An electromagnetic fuel injector and novel method for assembly and calibration having a solenoid assembly with a pole piece, a valve assembly including an armature, and a working air gap separating the valve assembly from the pole piece when the injector is in a de-energized state. A shim having a thickness equivalent to the length of the working air gap is placed between the pole piece and the valve member during construction of the injector. Following assembly, a solvent is introduced into the injector to dissolve the shim, which is constructed of a material readily dissolvable in the desired solvent, to define the working air gap and, therefore, the static flow through the injector.

REFERENCES:
patent: 2409865 (1946-10-01), Jewell
patent: 4509693 (1985-04-01), Nakai
patent: 4686752 (1987-08-01), Sharples
patent: 4946107 (1990-08-01), Hunt
patent: 5165656 (1992-11-01), Maier et al.
patent: 5232167 (1993-08-01), McCormick et al.

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