Exhaust-gas aftertreatment device

US8201393B2 · kind B2 · utility

Assignee

• Hilite Germany GmbH · DE

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: Feb 26, 2009
• Grant date: Jun 19, 2012
• Expiry date: Oct 31, 2030

Classification

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

Abstract

The invention relates to an exhaust-gas aftertreatment device, comprising a control unit (4) for controlling a diaphragm pump (2) that draws a urea/water solution out of a circuit and pumps it, via a pressure filter (3), to a metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream.In advantageous developments, the metering unit comprises a metering valve, including an atomizing nozzle, a pressure and temperature sensor, a heating means and a return baffle.