Patent ID: 8384278
Filing Date: 2013-02-26
Classification: H01T

Abstract:
1. A spark plug for an internal combustion engine, comprising: an insulator, including an insulator shoulder configured for mounting a tensioning nut or a housing and having a first outer diameter, an insulator head which is situated farther from the combustion chamber and adjoins the insulator shoulder, and which has a second outer diameter which is smaller than the first outer diameter, and a continuous cavity; a composition, including a first contact composition, a second contact composition, and a composition resistor situated between the first contact composition and the second contact composition; a connecting pin which contacts the first contact composition; a center electrode which contacts the second contact composition; and a ground electrode; wherein the connecting pin, the composition, and the center electrode is situated in the cavity, wherein the composition resistor has a third outer diameter, and wherein a ratio of the third outer diameter to the second outer diameter is between 0.35 and 0.7, wherein the third outer diameter is equal to or greater than 6 mm.