Diesel aftertreatment systems
US7475535B2 · kind B2 · utility
0Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for improving NOx conversion efficiency of a Nox-reducing catalyst by determining an accurate amount of reductant required is presented. The method includes calculating an initial reductant injection amount based on a steady state amount of NOx in the engine feedgas and adjusting the initial amount to compensate for transient NOx emissions. The compensation is initiated in response to an engine transient, such as impending acceleration or deceleration. This method further results in improved vehicle fuel economy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.