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:
Apr. 11, 1995
Filed:
Feb. 28, 1994
Kaius K Polikarpus, Davison, MI (US);
Harold E Durling, Elsie, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method is provided for forming a torch jet spark plug suitable for use in a torch jet-assisted spark ignition system for an internal combustion engine. The torch jet spark plug is configured to ignite a fuel mixture within a combustion prechamber formed integrally within the insulator body of the spark plug, such that a jet emanates from the prechamber and projects into the main combustion chamber of the engine, so as to increase the burning rate within the main chamber. More particularly, the method involves forming a tubular inner electrode on the internal surface of the combustion prechamber by integrating the molding process for the spark plug's insulator body with an inking process by which the inner electrode is formed.