Abstract: A spark plug, center electrode and method of construction is provided. The spark plug has a generally annular ceramic insulator and a conductive shell surrounding at least a portion of the ceramic insulator. A ground electrode is operatively attached to the shell, with the ground electrode having a ground electrode sparking surface. A center electrode has an elongate body with a center electrode sparking surface. The center electrode sparking surface and the ground electrode sparking surface provide a spark gap. The center electrode body is constructed of a composite material including at least one ceramic material.
Type:
Grant
Filed:
August 29, 2008
Date of Patent:
October 25, 2011
Assignee:
Federal-Mogul Ingnition Company
Inventors:
William J. Walker, Jr., James D. Lykowski