Step function lean burn oxygen sensor
US4381224A · kind A · utility
5Cited by
19References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1981 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Apr 27, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This specification discloses a step function lean burn sensor for determining the partial pressure of oxygen in an exhaust gas. Such a measurement is useful for air fuel ratio control in an internal combustion engine. This device uses the electrical properties of an electrochemical pump cell to determine the step function output. The device utilizes the qualitative nature of the current-voltage characteristic of the pump cell to reduce requirements on cell fabrication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.