Diesel OBD-II system for detection of degradation of catalyst activity
US6408616B1 · kind B1 · utility
30Cited by
25References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2000 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of monitoring catalyst activity that includes injecting hydrocarbon into the engine exhaust flow sufficient to maintain a constant concentration of reductant into the catalyst under variable engine exhaust flow conditions thereby permitting an accurate calculation of the actual HC conversion by the catalyst, and a determination of whether the catalyst is currently meeting emission regulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.