Method and device for operating a linear lambda probe
US6763697B2 · kind B2 · utility
4Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Dec 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The oxygen concentration lambda in the exhaust gas of an internal combustion engine is determined by establishing the average of the upper value OW and the lower value UW of the square-wave sum voltage Vsum corresponding to the difference DELTA Vs between the Nernst voltage Vs and the reference voltage Vref and converting this into a proportional pump current Ip which produces a Rc lambda—proportional voltage at the calibration resistor. The difference between the upper value OW and lower value UW of the sum voltage Vsum is used as a temperature measurement voltage Vri for regulating the temperature of the probe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.