Exhaust treatment system diagnostic via ammonium nitrite decomposition
US8544258B2 · kind B2 · utility
14Cited by
14References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Dec 14, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of monitoring operation of an exhaust treatment system of a diesel engine includes injecting a dosing agent into an exhaust and monitoring the operating conditions of an engine during normal driving conditions. A control module monitors inlet and outlet temperatures of a catalyst and compares the inlet temperature to the outlet temperature. The control module further evaluates the exhaust treatment system based on the inlet temperature, the outlet temperature and a predetermined temperature threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.