Method and apparatus for correcting a gas sensor response for moisture in exhaust gas
US6743352B2 · kind B2 · utility
35Cited by
26References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 6, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting the concentration of a specific gas (NOx) in an engine exhaust gas using a gas sensor and a process of correcting the gas sensor. According to the correcting process, the amount of moisture in the exhaust gas is estimated, then a a gas concentration detection signal output by the gas sensor on the basis of an estimated amount of moisture is corrected.Finally, the effect of the amount of moisture in the exhaust gas is removed or reduced from the detected value of gas concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.