On-line catalyst monitoring using a Kalman filter
US7043899B2 · kind B2 · utility
5Cited by
11References
10Claims
0Family size
Assignee
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Key dates
| Filing date | May 26, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Jul 21, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of non-intrusive monitoring of catalyst performance in an automotive exhaust system uses a model of catalytic converter operation emphasizing oxygen storage capacity dominance. Model parameters are identified using a recursive Kalman filtering technique. A catalyst diagnostic index is derived from at least one identified parameter, and the index is used to judge converter performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.