Apparatus for adding a liquid reducing agent to the exhaust gas from an internal combustion engine and motor vehicle

US11499460B2 · kind B2 · utility

Assignee

• MAN Truck & Bus SE · DE

Inventors

• Herbert Albert · Erlangen, DE
• Ghaith Arfaoui · Nuremberg, DE

Key dates

• Filing date: Sep 25, 2019
• Grant date: Nov 15, 2022
• Expiry date: Sep 25, 2039

Classification

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

Abstract

The present disclosure relates to an apparatus for adding a liquid reducing agent, preferably an aqueous urea solution, to the exhaust gas from an internal combustion engine. The apparatus according to the present disclosure comprises a dosing device arranged in an exhaust line of the internal combustion engine, which device is designed to generate a reducing agent spray by means of an injector. The apparatus furthermore comprises a swirl generator device, designed as a hollow body, preferably a hollow cylinder, about a longitudinal axis, which has a first end facing the injector and a second end facing away from the injector. The shell surface L of the swirl generator device, designed as a hollow body, furthermore comprises at least one exhaust inlet opening extending substantially in the longitudinal direction and a guide element, attached adjacent to the exhaust inlet opening and covering the exhaust inlet opening in the interior of the swirl generator device, at least in part at a distance, for deflecting an exhaust gas flow. According to the present disclosure, the guide element is closed in the direction of the first end of the swirl generator device, by means of a wall or co…