Patent · US Expired

Sensor element for limit current sensors to determine the .lambda.-value of gas mixtures

US5314604A · kind A · utility

20Cited by

6References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karl-Hermann Friese · Leonberg, DE
Werner Gruenwald · Gerlingen, DE
Hans-Martin Wiedenmann · Stuttgart, DE

Key dates

Filing date	Apr 12, 1993
Grant date	May 24, 1994
Priority date	—
Expiry date	Apr 12, 2013

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/417
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor element for broad band sensors to determine the .lambda.-value of gas mixtures is suggested. This sensor element can be manufactured in ceramic-sheet and screen-printing technology and is provided in the diffusion gap (7) downstream from a pair of pump electrodes (8,8"), arranged on both sides of the diffusion gasp (7), with a Nernst electrode (9) which functions as an exhaust gas electrode. Due to this arrangement of the Nernst electrode (9), it is possible in a simple manner to effectively protect the pump cell formed by the interior pump electrodes (8,8') from overload and to prevent falsification of the sensor signal.

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