Patent · US Active

Method for correcting the pump current of a sensor element

US9222912B2 · kind B2 · utility

1Cited by

1References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Lothar Diehl · Stuttgart, DE
Goetz Reinhardt · Eppelheim, DE
Thomas Seiler · Stuttgart, DE
Hartwig Lehle · Stuttgart, DE

Key dates

Filing date	Jun 27, 2011
Grant date	Dec 29, 2015
Priority date	—
Expiry date	Dec 14, 2032

Classification

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

Abstract

A method for operating a sensor element, in particular a lambda sensor, for determining the concentration of a gas component of a gas mixture, in which the gas component is removed from a measuring gas chamber by applying a pump voltage and the concentration of the gas component in the gas mixture is inferred therefrom. Oscillations of the pump current caused by dynamic pressure variations are taken into consideration for a correction of the sensor signal in that a frequency analysis of the pump current is carried out.

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