Air/fuel ratio sensor
US4935119A · kind A · utility
3Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1986 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Feb 25, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/417
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air/fuel ratio sensor is described, comprising an oxygen pump element composed of a solid electrolyte having a pair of electrodes on opposite sides thereof, a gas diffusing section section that is in contact with one electrode on said oxygen pump element and which accepts a limited inflow of a gas to be analyzed, and an oxygen gas detecting element that is based on a transition metal oxide disposed within said gas diffusing section, the resistance of which varies in proportion to the partial pressure of oxygen gas in the gas to be analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.