Patent · US Active

Exhaust gas sensor

US8176767B2 · kind B2 · utility

3Cited by

5References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jens Schneider · Anderson, US
Christoph Zimmermann · Birkenau, DE
Sascha Klett · Oppenweiler, DE

Key dates

Filing date	Dec 17, 2008
Grant date	May 15, 2012
Priority date	—
Expiry date	Nov 19, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4077
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Exhaust-gas sensors that have a sensor element, which is surrounded by two protective tubes on a side facing the exhaust gas and which is additionally protected by a porous fiber package, are already known. The fiber package is disposed between the two protective tubes and is meant to protect the sensor element from thermal shock by water droplets hitting the sensor element. When the exhaust gas sensor is used as primary catalytic converter or raw emission sensor, the sensor element can get damaged by sulfur compounds contained in the exhaust gas. In the exhaust-gas sensor according to the invention, damage to the sensor element by exhaust-gas components contained in the exhaust gas is reliably prevented. According to the invention, the adsorption means is implemented in such a way that sulfur, phosphorus or silicon compounds are trapped irreversibly.

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