Exhaust gas sensing system and method for determining concentrations of exhaust gas constituents
US8103458B2 · kind B2 · utility
3Cited by
12References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Apr 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4074
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exhaust gas sensing system and a method for determining concentrations of exhaust gas constituents are provided. The exhaust gas sensing system includes a NH3 sensing cell, a NO2 sensing cell, a NOx pumping cell, and a current sensor that detects an electrical current flowing through the NOx pumping cell. A computer determines a NO2 concentration value, a NH3 concentration value, a NO concentration value, and a NOx concentration value based on signals from the NH3 sensing cell, the NO2 sensing cell, and the current sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.