| 摘要 |
<p>A spark plug (10) having an open-vertex triangular grounding electrode (22) opposed to a central electrode (20) surrounded by and flush with an insulator (16). Spark initiation occurs across the insulator surface, across a spark gap, or both simultaneously. Sparks climb the triangular structure to emerge at the open-vertex to extend into a combustion chamber. A surface gap is set at about 0.050 inches and an air gap at about 0.037 inches.</p> |
