Apparatus and method for the after-treatment of exhaust gases from an internal combustion engine operating with excess air
US6192677A · kind A · utility
100Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An injection valve of a reducing agent metering device is enclosed in a double-walled valve holding element that is connected directly to the exhaust-gas line. It is thereby possible to blow pressurized air into an air gap between an outer wall and an inner wall of the valve holding element and, as a result, to cool at least those parts of the injection valve that are in close vicinity to the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.