Device and method for denoxing exhaust gas from an internal combustion engine
US6637196B1 · kind B1 · utility
33Cited by
10References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 24, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device and a method for deNOxing exhaust gas from an internal combustion engine includes taking into account an amount of gaseous reducing agent (ammonia) that escapes while the internal combustion engine is at a stand-still as a result of temperature influences in a calculation of the amount of reducing-agent solution (urea) that is to be metered when the internal combustion engine is operating. The gaseous reducing agent is passed to the reduction catalytic converter through a pressure-relief line that includes a pressure-control valve, and, in the method, the amount is recorded by a flowmeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.