BOUGIE D'ALLUMAGE POUR UN MOTEUR A COMBUSTION INTERNE

摘要

Plug has an insulator held in a metal sheath (2), and a central electrode (4) protected in the insulator. The central electrode has an end section, which protrudes from the insulator. An earth electrode exhibits a base unit and a projection unit that protrudes from a surface of the base unit. A terminal wall of the projection unit points to the end section of the central electrode over a spark gap.