Method and system for maintaining aftertreatment efficiency
US7841172B2 · kind B2 · utility
4Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Sep 29, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.