Exhaust gas re-circulation arrangement

US6216459A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Helmut Daudel · Schorndorf, DE
• Helmut Finger · Echterdingen, DE
• Erwin Schmidt · Baltmannsweiler, DE
• Siegfried Sumser · Stuttgart, DE

Key dates

• Filing date: Dec 10, 1999
• Grant date: Apr 17, 2001
• Expiry date: Dec 10, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In an exhaust gas re-circulation arrangement for a supercharged internal combustion engine including an exhaust gas turbocharger with an exhaust gas turbine and a compressor, first and second exhaust pipes extending from the engine separately to the exhaust gas turbine, a charge air duct extending from the compressor to the engine and an exhaust gas recirculation line extending from one of the exhaust pipes upstream of the exhaust gas turbine to the charge air duct downstream of the compressor, the exhaust gas turbine has two turbine inlet flow passages, which provide for different flow volumes and to each of which one of the exhaust pipes is connected and a control arrangement is provided for controlling the exhaust gas flow through the turbine inlet flow passages so as to control the pressure in the exhaust gas re-circulation line to be higher than in the charge air intake duct.