Exhaust-gas aftertreatment device

US8959895B2 · kind B2 · utility

Assignee

• Cummins Inc. · US

Inventors

• Friedrich Zapf · Karlstadt, DE
• Heico Stegmann · Würzburg, DE
• Andreas Lannig · Kreuzwertheim, DE
• Klaus Lang · Munster, DE
• Christian Schmidt · Erfurt, DE
• Alexandre Branco · Schweinfurt, DE

Key dates

• Filing date: Mar 27, 2012
• Grant date: Feb 24, 2015
• Expiry date: Apr 10, 2032

Classification

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

Abstract

An exhaust-gas aftertreatment device is provided, comprising a control unit for controlling a diaphragm pump that draws a urea/water solution out of a circuit and pumps it, via a pressure filter, to a metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream. The metering unit may also comprise a metering valve, including an atomizing nozzle, a pressure and temperature sensor, a heating means and a return baffle.