Patent · US Active

Method for the dynamic monitoring of a NOx sensor

US10845332B2 · kind B2 · utility

1Cited by

1References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eckehard Knoefler · Erbach, DE
Torsten Handler · Stuttgart, DE

Key dates

Filing date	May 8, 2017
Grant date	Nov 24, 2020
Priority date	—
Expiry date	May 8, 2037

Classification

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

Abstract

The invention relates to a method for monitoring a NOx sensor (10) having an oxygen-ion-conducting solid electrolyte and having at least one cavity (12), wherein at least one cavity (12) of the NOx sensor is flooded with a defined oxygen concentration during a self-diagnosis of the NOx sensor. The gradient of a pump current resulting therefrom is evaluated and, in the case of a deviation in comparison with reference values, possibly impaired dynamics of the NOx sensor are inferred.

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