Patent · US Active

Gas sensor heating device insulation

US8921738B2 · kind B2 · utility

3Cited by

19References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Detlef Heimann · Gerlingen, DE
Thomas Wahl · Pforzheim, DE
Lothar Diehl · Stuttgart, DE
Thomas Moser · Schwieberdingen, DE
Stefan Rodewald · Ditzingen, DE

Key dates

Filing date	Apr 29, 2003
Grant date	Dec 30, 2014
Priority date	—
Expiry date	Apr 5, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4067
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A heating device for a sensor element of a gas sensor, in particular for use in exhaust gas analysis of internal combustion engines, has a heating element, which has an electrical resistor layer. The heating element is electrically insulated from at least one solid electrolyte layer by a layer containing barium and/or strontium and/or calcium. For this purpose, the heating element is embedded in a first insulator, which is adjoined by a second insulator. The first insulator has a higher barium and/or strontium and/or calcium content (expressed in weight percentage) than the second insulator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.