Patent · US Active

Method and apparatus for the self-diagnosis of an exhaust gas probe

US8788184B2 · kind B2 · utility

4Cited by

4References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Thomas Baumann · Wettingen, CH
Enno Baars · Leonberg, DE
Johannes Grabis · Renningen, DE
Benjamin Hagemann · Gerlingen, DE
Bernhard Kamp · Ludwigsburg, DE

Key dates

Filing date	Apr 19, 2011
Grant date	Jul 22, 2014
Priority date	—
Expiry date	Apr 18, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for the self-diagnosis of an exhaust gas probe (20). The exhaust gas probe (20) has at least one heating element (26). The method includes a modeled heat output PH is determined for the heating element (26) by means of a computer program comparing parameters of the gas stream with a measured heat output, and determining, when the parameters of the gas stream exceeds the measured heat output by more than a defined tolerance limit, that one of the exhaust gas probe (20) is defective, and an exhaust gas section (17) in which the exhaust gas probe (20) is installed is faulty.

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