Electrically-heated glowplug and method for production of an electrically-heated glowplug

摘要

An electrically heatable glow plug and a method of manufacturing an electrically heatable glow plug allow better decoupling between a heating coil and a combustion-chamber-side end of a glow tube. The electrically heatable glow plug for internal combustion engines includes a metallic glow tube, sealed on the combustion-chamber side, into which an electrically conductive heating coil is introduced, the heating coil being connected in an electrically conductive manner to the glow tube in the region of the sealed combustion-chamber-side end of the glow tube. A sealing arrangement is provided which seals the glow tube on the combustion-chamber side and supports the heating coil and only protrudes into the heating coil if the heating coil is connected to the sealing arrangement via an inner side of the heating coil, for which purpose the sealing arrangement is in contact with the inner side of the heating coil essentially over the entire length protruding into the heating coil.