Supercharged internal combustion engine with capability for mechanical step-up drive of an exhaust gas turbocharger

US5729978A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Herman Hiereth · Jeffery Road, DE
• Harald Dauble · Wissen, DE
• Klaus Marquardt · Burghausen, DE
• Michael Hoffmann · Gablingen, DE

Key dates

• Filing date: Aug 23, 1995
• Grant date: Mar 24, 1998
• Expiry date: Aug 23, 2015

Classification

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

Abstract

A supercharged internal combustion engine has an exhaust gas turbocharger which includes an exhaust gas turbine and a compressor. The exhaust gas turbine and the compressor are connected to a turbocharger shaft and an appliance for the transmission of power for the purpose of a mechanical step-up drive capability for the exhaust gas turbocharger arranged between the turbocharger shaft and the crankshaft of the internal combustion engine. The appliance includes at least one step-up gear and a controllable hydrodynamic coupling for torque transmission arranged between the crankshaft and the turbocharger shaft. In order to configure the internal combustion engine in a simple and compact constructional manner in such a way that a better increase in torque of the internal combustion engine can be achieved in the lower rotational speed range by the mechanical step-up drive of the exhaust gas turbocharger and to achieve substantially shorter response times during transient operation of the internal combustion engine, the hydrodynamic coupling can be locked up by a mechanical or electro-mechanical clutch and is arranged between the step-up gear and the crankshaft of the internal combustion…