Method for detecting urea deposits in an exhaust line of an automotive vehicle, method for eliminating urea deposits and automotive vehicle adapted to such methods
US9097159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2010 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Nov 21, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method is provided for detecting urea deposits in an exhaust line of an automotive vehicle and includes determination if an exhaust gas's temperature is reached, if the result of determination is positive, stoppage of urea injection, and determination of the quantity of NOx in the exhaust gases on the outlet of the selective catalytic reduction system. A comparison is performed between the quantity of NOx determined on the outlet of the selective catalytic reduction system and a theoretical quantity or a measured quantity of NOx produced by the internal combustion engine. If the comparison shows that the quantities are different, it is considered that urea deposits are present in the exhaust line. A vehicle is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.