Patent · US Expired

Method of operating an oxygen probe having an internal reference atmosphere

US5494557A · kind A · utility

6Cited by

5References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gerhard Hotzel · Stuttgart, DE
Harald Neumann · Lambach, DE
Walter Strassner · Schorndorf, DE
Johann Riegel · Bietigheim-Bissingen, DE

Key dates

Filing date	Sep 30, 1994
Grant date	Feb 27, 1996
Priority date	—
Expiry date	Sep 30, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4065
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention is directed to a method of operating an exhaust-gas probe having a pumped reference atmosphere in a relatively closed volume. In this method, the oxygen ion current, which carries the pump current Ip to the reference atmosphere, is temporarily increased under specific conditions. In this way, an adulteration of the reference atmosphere can be more rapidly eliminated. This adulteration can occur because of fuel particles which diffuse in.

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