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US 6,888,109 B2Granted
Heating device
AssigneeRobert Bosch GmbH
InventorsDetlef Heimann, Torsten Handler, Lothar Diehl, Dieter Lindauer, Dietmar Seizinger
Life of this patent
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Abstract
A heating device for a gas sensor, in particular for use in the exhaust gas analysis of internal combustion engines, including a heating element having an electrical resistor layer. The heating element is embedded in a first insulation which in turn is surrounded, at least in part, by a second insulation. The first and the second insulation have different porosities.
Claims32
A heating device for a gas sensor for use in analyzing exhaust gas of an internal combustion engine, the heating device comprising:
- a heating element that includes an electrical resistor layer and that is electrically insulated;
- a first insulation, wherein the heating element is embedded therein;
- and
- a second insulation at least partially surrounding the first insulation, wherein the first insulation and the second insulation have different porosities.
1 more element
Dependencies are inferred from the claim text.