Method and apparatus for measuring the O.sub.2 content of a gas
US4147513A · kind A · utility
43Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1977 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Sep 26, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring the O.sub.2 content in an exhaust gas of an internal combustion engine by exposing two resistors to the exhaust gas of an internal combustion engine. The resistance of both resistors varies as a function of the temperature of the exhaust gas to which it is exposed. However, the resistance of one of the resistors also varies as a function of the oxygen content of the exhaust gas. Therefore, an electrical signal can be obtained which is a function of the O.sub.2 content of the exhaust gas, with the temperature effect of the exhaust gas on the resistor being minimized or eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.