Exhaust-gas treatment arrangement

US12241396B2 · kind B2 · utility

Assignee

• Purem GmbH · DE

Inventors

• Silas Bräuning · Denkendorf, DE
• Wolfgang Datz · Tübingen, DE
• Markus Henzler · Stuttgart, DE
• Oleksandr Velyaev · Stuttgart, DE
• Tobias Wolf · Sandkrug, DE
• Arthur Wieland · Baltmannsweiler, DE

Key dates

• Filing date: Dec 4, 2023
• Grant date: Mar 4, 2025
• Expiry date: Dec 11, 2043

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2610/1453
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An exhaust-gas treatment arrangement for an exhaust-gas system of a combustion engine has a first exhaust-gas treatment unit and, downstream thereof, an exhaust-gas treatment assembly. The treatment unit and the treatment assembly are arranged axially one after the other in the direction of a flow-path longitudinal axis of a flow path including the treatment unit and the treatment assembly. A hydrocarbon introducer for introducing hydrocarbon into exhaust gas flowing in the flow path is in the flow path substantially axially between the treatment unit and the treatment assembly. The hydrocarbon introducer includes an introduction ring flow channel annularly surrounding the flow-path longitudinal axis. The channel is open in an upstream end region toward an outlet region of the treatment unit and is open in a downstream end region toward an inlet region of the treatment assembly. The hydrocarbon introduction assembly includes a discharging unit for discharging hydrocarbon into the channel.