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:
Sep. 07, 1993
Filed:
Dec. 09, 1991
David P Wieczorek, Newport News, VA (US);
Thomas A Sumrak, Newport News, VA (US);
Siemens Automotive L.P., Auburn Hills, MI (US);
Abstract
An electromagnetically operated fuel injector has a dynamic flow calibration mechanism in which a control rod that extends between and enters holes in both the stator and the armature is selectively positioned to divert some of the magnetic flux from the axial working gap between the stator and the armature such that the diverted magnetic flux passes through the control rod directly between the stator and the armature without passing through the working gap. A non-magnetic tube is disposed between the control rod and the stator and armature holes. The portion of that tube which is within the stator hole is joined to the stator while the portion which is within the armature hole provides guidance for the armature. In a bottom-feed version of fuel injector the tube also serves to prevent fuel within the injector from wetting the control rod. The fuel injector is dynamically calibrated by selectively positioning the control rod by use of an external tool that engages the control rod so that the diverted flux which is conducted between the stator and the armature is conducted through the control rod without passing through the working gap.