Exhaust gas system having an exhaust gas treatment unit and a heat exchanger in an exhaust gas recirculation line

US7490595B2 · kind B2 · utility

Assignees

• EMITEC Gesellschaft fuer Emissionstechnologie mbH · DE
• BEHR GMBH & CO. KG · DE

Inventors

• Rolf Brück · Bensberg, DE
• Andreas Scheeder · Siegburg, DE
• Peter Geskes · Esslingen am Neckar, DE
• Ulrich Maucher · Ditzingen, DE
• Jens Ruckwied · Stuttgart, DE

Key dates

• Filing date: Sep 24, 2007
• Grant date: Feb 17, 2009
• Expiry date: Sep 24, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2240/02
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An exhaust gas system for an internal combustion engine includes an intake system and an exhaust outlet interconnected by an exhaust gas recirculation line having an exhaust treatment unit and a heat exchanger. The heat exchanger has a first back pressure and the exhaust treatment unit has a second back pressure, smaller than the first back pressure. The exhaust treatment unit is disposed at such a first distance from the heat exchanger in flow direction that, during operation, a gas flow entering the exhaust treatment unit is homogenized. The exhaust gas system permits an advantageous configuration of a heat exchanger and an exhaust treatment unit, such as for example a honeycomb body in the exhaust gas recirculation line, in which both the heat exchanger and the exhaust treatment unit can have a smaller structure than in conventional systems. This reduces costs considerably for equipping such a system.