Patent · US Expired

Method for monitoring the function of a gas sensor and/or for regenerating the same

US6551499B1 · kind B1 · utility

7Cited by

8References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Carsten Springhorn · Stuttgart, DE
Bernd Schumann · Rutesheim, DE
Sabine Thiemann-Handler · Stuttgart, DE

Key dates

Filing date	Jun 20, 2001
Grant date	Apr 22, 2003
Priority date	—
Expiry date	Jun 20, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/419
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

This invention provides a method for monitoring the function and/or regeneration of a gas probe. The invention includes a measurement of first and second pump currents of the gas probe and a determination of a difference between the first and second pump currents (&Dgr;I). If &Dgr;I exceeds a pregiven value, then a saturation pump voltage is applied and the difference between a resulting pump current and a previously stored minimum pump current (&Dgr;I plus) is determined. If &Dgr;I plus exceeds a pregiven value, then a regeneration voltage is applied.

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