ELECTRODE MATERIAL FOR A SPARK PLUG

摘要

A spark plug for use in an internal combustion engine includes an electrode material having a core (20) of a high thermal conductivity for reducing the temperature of the spark plug (10) by thermally conducting heat away from the spark plug to a cooler part of the engine. The core (20) extends continuously from an arcing surface at an end of a spark plug electrode to the cooler part of the engine. Surrounding the core (20) is a cladding layer (22) for resisting corrosion when exposed to high temperatures caused by arcing.