SCR exhaust gas aftertreatment device

US8875502B2 · kind B2 · utility

Assignee

• Cummins Inc. · US

Inventors

• Tobias Fuchs · Zell am Harmersbach, DE
• Andreas Lannig · Kreuzwertheim, DE
• Ralf Rohrmueller · Wertheim, DE
• Sebastian Weidner · Obermoschel, DE
• Friedrich Zapf · Karlstadt, DE

Key dates

• Filing date: Dec 12, 2011
• Grant date: Nov 4, 2014
• Expiry date: May 29, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided. At least one component of the device (e.g., a filter element) lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam. This prevents freezing damage even over a very long period of time and a large number of freezing cycles.