Patent ID: 6727472
Filing Date: 2004-04-27
Classification: F23Q

Abstract:
A sheathed-element glow plug to be mounted in a combustion chamber, comprising:a housing; a rod-shaped heating element situated in a concentric bore hole of the housing, the heating element including a first current-carrying layer and a second current-carrying layer, wherein: the first current-carrying layer has a length that is different than a length of the second current-carrying layer; a conducting-layer crosspiece, the first current-carrying layer and the second current-carrying layer being connected to an end of the heating element on a combustion chamber side via the conducting-layer crosspiece; a first insulating layer for separating the first current-carrying layer from the second current-carrying layer, wherein: a cross section of the first current-carrying layer in a first section at an end of the heating element away from the combustion chamber is greater than a cross section of a remaining length of the first current-carrying layer; and the second current-carrying layer does not extend into the first section; an external second insulating layer surrounding the first current-carrying layer over a length of a third section of the heating element.