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AssigneeRobert Bosch GmbH
InventorsPia Mondal, Christine Engel, Andreas Reissner, Wolfgang Dressler, Horst Boeder, Christoph Kern, Steffen Schott, Ruth Hoffmann
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A sheathed-element glow plug to be mounted in a combustion chamber is proposed, a rod-shaped heating element being situated in a concentric bore hole of the housing. The heating element has a first current-carrying layer (11), a second current-carrying layer (12), and an insulating layer (15), the insulating layer (15) separating the first current-carrying layer (11) and the second current-carrying layer (12). The first current-carrying layer (11) and the second current-carrying layer (12) being connected at the end of the heating element on the combustion chamber side by a conducting-layer crosspiece (13). The first current-carrying layer (11) and the second current-carrying layer (12) are different lengths, the cross section of the first current-carrying layer (11) in a first section (21) at the end of the heating element away from the combustion chamber being greater than the cross section of its remaining length, and the second current-carrying layer (12) not extending into the first section (21).
Sheathed-element glow plug to be mounted in a combustion chamber, having a housing (3) and a rod-shaped heating element situated in a concentric bore hole of the housing, the heating element having a first current-carrying layer (11) and a second current-carrying layer (12), the first current-carrying layer (11) and the second current-carrying layer (12) being connected at the end of the heating element on the combustion chamber side via a conducting-layer crosspiece (13), the first current-carrying layer (11) and the second current-carrying layer (12) being separated by a first insulating layer (15), the first current-carrying layer (11) and the second current-carrying layer (12) being different lengths,
Dependencies are inferred from the claim text.