Method and apparatus for urea injection in an exhaust aftertreatment system
US7426825B2 · kind B2 · utility
23Cited by
16References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2006 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Jul 25, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust aftertreatment system and control system is provided, including a urea injecting device, a selective catalyst reduction device, and, a sensing device operative to monitor a forward portion of the selective catalyst reduction device. The sensing device can comprise a NOx sensor, and alternatively, an ammonia sensor. A control module adapted to monitor signal inputs from the engine, the NOx sensing system, the temperature sensing system, and the sensing device operative to monitor a forward portion of the selective catalyst reduction device; and, adapted to control operation of the urea injecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.