Ammonia (NH3) storage control system and method at low nitrogen oxide (NOx) mass flow rates
US8096110B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2008 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A control system comprising an ammonia (NH3) storage level determination module that determines a NH3 storage level in an exhaust system, a desired NH3 storage level determination module that determines a desired NH3 storage level based on an exhaust temperature, and a nitrogen oxide (NOx) mass flow rate control module that controls a NOx mass flow rate based on a difference between the NH3 storage level and the desired NH3 storage level. A method comprising determining a NH3 storage level in an exhaust system, determining a desired NH3 storage level based on an exhaust temperature, and controlling a NOx mass flow rate based on a difference between the NH3 storage level and the desired NH3 storage level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.