Volkswagen Ag

Johannes Westendorf

Ekkehard Pott

Stefan Paukner

Axel Groenendijk

Hans-Georg Nitzke

Oliver Cassebaum

Falk-Christian Von Ceumern-lindenstjerna

Thorsten Schmidt

Thorsten Rebohl

Stephan Kellner

Ingo Blei

Michael Bippes

Johannes Bunkus

Baron Falk-Christian Von Ceumern-Lindenstjerna

Jasper Kammeyer

A method for operating a hybrid drive system of a motor vehicle, in which an internal combustion engine with a belt-driven starter generator coupled thereto is operated in an overrun mode for braking of the motor vehicle, wherein, in order to avoid a delivering of air to an exhaust system of the hybrid drive system, the internal combustion engine is configured in such a manner that intake valves and/or exhaust valves of the internal combustion engine remain closed during a rotation of a crankshaft of the internal combustion engine. A hybrid drive system for a motor vehicle and a motor vehicle having a hybrid drive system are also provided.

Method for operating a hybrid drive system of a motor vehicle, hybrid drive system, and motor vehicle

A method for operating a hybrid drive system of a motor vehicle, in which an internal combustion engine with a belt-driven starter generator coupled thereto is operated in an overrun mode for braking of the motor vehicle, wherein, in order to avoid a delivering of air to an exhaust system of the hybrid drive system, the internal combustion engine is configured in such a manner that intake valves and/or exhaust valves of the internal combustion engine remain closed during a rotation of a crankshaft of the internal combustion engine. Also provided is a hybrid drive system for a motor vehicle and to a motor vehicle having a hybrid drive system.

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Braunschweig, Germany

Johannes Westendorf