| 摘要 |
A spark plug for a spark-ignited internal combustion engine including a generally tubular ceramic insulator, a conductive shell surrounding the insulator, at least one ground electrode attached to the shell, and a center electrode disposed in the insulator. The ground electrode extends from an anchored end adjacent the conductive shell to a distal end adjacent the spark gap. The ground electrode includes a ledge formed on its distal end having at least one inset planar surface and an inset back wall. A high performance metallic sparking tip is attached to the distal end of the ground electrode. The sparking tip has a base end disposed in surface-to-surface contact with the inset planar surface of the ledge. The inset planar surface completely covering the base end of the sparking tip and extending outwardly therefrom to provide an exposed peripheral interface. |
