Patent · US Active

Method for monitoring a gas sensor

US11808732B2 · kind B2 · utility

0Cited by

0References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andreas Fritsch · Eggstätt, DE
Sabine Gräbe · Ludwigsburg, DE
Torsten Handler · Stuttgart, DE

Key dates

Filing date	May 18, 2020
Grant date	Nov 7, 2023
Priority date	—
Expiry date	Jan 5, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for monitoring a gas sensor (14) which comprises two electrochemical measuring cells (20, 30) and which is arranged in an exhaust tract (10) of an internal combustion engine (11), wherein the sensor elements (20, 30) exhibit a substantially identical sensitivity towards a first gas component and a different sensitivity towards a second gas component and are insensitive towards further gas components. In an operating state in which an exhaust gas stream at the gas sensor (14) contains less of the second gas component than of the first gas component a concentration of the first gas component is calculated from each of the sensor signals from the sensor elements (20, 30) and a defect in a sensor element (20, 30) is deduced from the concentrations of the first gas component.

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