MULTISPIRAL FOR A PRE-HEATING PENCIL SPARK PLUG

摘要

The invention relates to a pre- heating pencil spark plug, in particular for internal combustion engines. Said spark plug consists of a housing and a hot tube mounted thereon and comprising a heating and control spiral arranged inside said hot tube. The inventive heating and control spiral can be powered with the aid of a connecting bolt arranged in the housing. Said control spiral (7) or heating spiral (4) or heating and control spiral (4) can be embodied in such a way that they are multiturn.