Patent · US Expired

Exhaust gas operated apparatus for continuously measuring air number of engine intake mixture

US3948081A · kind A · utility

21Cited by

6References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolf Wessel · Oberriexingen, DE
Ernst Linder · Mühlacker, DE
Helmut Maurer · Rodenbach, DE
Horst Neidhard

Key dates

Filing date	Aug 9, 1974
Grant date	Apr 6, 1976
Priority date	—
Expiry date	Aug 9, 1994

Classification

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

Abstract

The output of an oxygen sensor is fed in parallel to the inputs of amplifiers having amplification in different portions of the sensor output range and having different gain. The amplifier outputs are combined in a summing circuit. The result is to smooth out the characteristic of the measurement and to produce a signal that can drive an indicator to provide a meaningful indication in terms of air number. The temperature of the oxygen sensor must be regulated or compensated for for good results.

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