Patent · US Expired

Exhaust gas purification unit with reducing agent supply

US7254939B2 · kind B2 · utility

11Cited by

7References

17Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Frank Duvinage · Kirchheim unter Teck, DE
Christian Goerigk · Hemmingen, DE
Arno Nolte · Stuttgart, DE
Markus Paule · Bad Marienberg, DE
Henning Sander · Ludwigsburg, DE

Key dates

Filing date	Apr 11, 2002
Grant date	Aug 14, 2007
Priority date	—
Expiry date	Apr 11, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An exhaust gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean burn mode, in particular a diesel engine used in motor vehicles, has a particulate filter and a SCR catalytic converter arranged in the exhaust pipe in succession in the direction of flow, and a reducing agent supply. Ammonia can be added to the exhaust gas from the internal combustion engine on the entry side of the SCR catalytic converter by the reducing agent supply. A hydrogen-generating unit enriches the exhaust gas from the internal combustion engine with generated hydrogen.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.