Patent · US Active

Solid electrolyte sensor having two pumping cells for measurement of nitrogen oxides

US8858779B2 · kind B2 · utility

1Cited by

0References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dirk Liemersdorf · Sachsenheim, DE
Benjamin Sillmann · Aschersleben, DE
Berndt Cramer · Leonberg, DE

Key dates

Filing date	Oct 21, 2010
Grant date	Oct 14, 2014
Priority date	—
Expiry date	Jun 11, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/41
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting a proportion of at least one gas species in a measurement gas space. A sensor element is used, having an oxygen reduction pumping cell for concentration of the gas species, a pumping cell connected downstream of the oxygen reduction pumping cell having pumping electrodes, and a gas-tight chamber. A pumping electrode may be exposed to gas from the measurement gas space which has been concentrated by the oxygen reduction pumping cell. A further pumping electrode is disposed in the gas-tight chamber. At least one measuring electrode is further disposed in the gas-tight chamber. The oxygen reduction pumping cell and the pumping cell are galvanically isolated. The method includes an initialization phase, and an accumulation phase.

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