Internal combustion engine with exhaust gas turbocharger

US6018949A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Harald Brosecke · Stuttgart, DE
• Rudolf Klein · Oberhausen, DE

Key dates

• Filing date: Sep 24, 1997
• Grant date: Feb 1, 2000
• Expiry date: Sep 24, 2017

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 internal combustion engine with an exhaust gas turbocharger having an exhaust gas turbine arranged in an engine exhaust pipe upstream of a catalytic converter and a bypass line branching off the exhaust pipe upstream of the exhaust gas turbine and rejoining the exhaust pipe between the exhaust gas turbine and the catalytic converter, a bypass valve is provided which is so controlled that, after startup of the internal combustion engine, the bypass valve is, during a catalytic converter heat-up period, at least partially opened when the internal combustion engine load is below a predetermined value and is only closed when the engine load is above the predetermined value.