Electric heating – Heating devices – Resistive element: igniter type
Reexamination Certificate
2005-07-26
2005-07-26
Evans, Robin (Department: 3742)
Electric heating
Heating devices
Resistive element: igniter type
C219S544000, C123S14500A, C123S14500A, C361S265000, C361S266000
Reexamination Certificate
active
06921879
ABSTRACT:
A sheathed-element glow plug having an ionic-current sensor, as well as a method for operating a sheathed-element glow plug having an ionic-current sensor are described, the sheathed-element glow plug having a housing and a rod-shaped heating element arranged in a concentric bore hole of the housing. The heating element has at least one insulating layer as well as a first lead layer and a second lead layer, the first lead layer and the second lead layer being connected via a bar at the end of the heating element on the combustion chamber side, the first and second lead layers and the bar being made of electroconductive ceramic material, and the insulating layer being made of electrically insulating ceramic material. The heating element has a first electrode for detecting ionic current and a second electrode for detecting ionic current which are embedded in the insulating layer or applied on the insulating layer.
REFERENCES:
patent: 5922229 (1999-07-01), Kurano
patent: 6483079 (2002-11-01), Sato et al.
patent: 34 28 371 (1984-08-01), None
patent: 0834652 (1997-10-01), None
patent: 0 989 368 (2000-03-01), None
Arnold Juergen
Haluschka Christoph
Kern Christoph
Evans Robin
Kenyon & Kenyon
Patel Vinod D.
Robert & Bosch GmbH
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