Importance

Loading Importance Indicators...

Abstract

One example provides a spark plug having a center electrode including a first material and a second material, the second material having a hardness rating greater than a hardness rating of the first material. The center electrode includes an electrode head, wherein at least a portion of the electrode head is disposed beyond an end surface of an insulative nose toward the firing end and has a cross-sectional area perpendicular to an axial centerline greater than a cross-sectional area of the end surface of the insulative nose. The center electrode has a region of first material disposed axially beyond the end surface of the insulative nose, and includes a shield element of the second material which covers exposed surfaces of the region of first material disposed beyond the end surface of the insulative nose. An electrode wire extends from the electrode head into a central bore of the insulative nose.

Loading the Abstract Image...

First Claim