Air/fuel ratio detector
US4839018A · kind A · utility
15Cited by
4References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 1, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Feb 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An A/F detector having an output which is unambiguous over the entire operating region of the device, including both fuel-rich and fuel-lean regions. The detector includes two cells, an electrochemical cell and a pump cell. A constant current is passed through the electrochemical cell and the current through the pump cell is controlled in such a manner that the voltage across the electrochemical cell is constant. The current through the pump cell is detected to provide the unambiguous output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.