The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 1994
Filed:
Aug. 19, 1993
Brent J Wahba, Honeoye Falls, NY (US);
General Motors Corporation, Detroit, MI (US);
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.