SPARK PLUG HAVING MULTI-LAYER SPARKING COMPONENT ATTACHED TO GROUND ELECTRODE

摘要

A spark plug having a metal shell, an insulator, a center electrode, a ground electrode, and a multi-layer sparking component. The multi-layer sparking component is attached at a firing end of the ground electrode and includes a thin precious metal layer formed overtop a base metal layer and, according to some embodiments, overhangs the end of the ground electrode. The precious metal and base metal layers may be pre-manufactured together as a bi-metal ribbon, sheet or laminate before the multi-layer sparking component is attached to the ground electrode.

主权项

1. A spark plug, comprising:
a metal shell having an axial bore; an insulator at least partially disposed in the metal shell axial bore and having an axial bore; a center electrode at least partially disposed in the insulator axial bore; a ground electrode attached to the metal shell and having a distal end surface; and a multi-layer sparking component attached to the ground electrode and having a precious metal layer and a base metal layer, wherein a portion of the multi-layer sparking component overhangs the distal end surface of the ground electrode.