Patent · US Active

Sensor element and method for determining the concentration of gas components in a gas mixture

US7780829B2 · kind B2 · utility

1Cited by

2References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Lothar Diehl · Stuttgart, DE
Marcus Scheffel · Erlangen, DE

Key dates

Filing date	Aug 18, 2005
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Jan 23, 2028

Classification

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

Abstract

A sensor element for the determination of the concentration of gas components in a gas mixture, particularly of the concentration of gas components in the exhaust of internal combustion engines, with two electrodes, that together with a solid electrolyte constitute a pumping cell, whose outer pumping electrode is exposed to the gas mixture by way of a porous protective layer, and with a reference electrode, which is disposed on the solid electrolyte and is exposed to a reference gas, and which with a solid electrolyte and a Nernst electrode constitutes a concentration or Nernst cell, is thereby characterized in that at least periodically the Nernst voltage between the outer pumping electrode and the Nernst electrode is tapped and analyzed.

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