Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Stefan Wimmer

Heiko Mayer

Thomas Rauner

Nils Sauvlet

Tobias Roulet

Markus Gantikow

Florian Fuhr

Holger Bartels

Dominik Bender

Christoph Bittner

Wolfgang Held

Christian Wiedenbruegge

A method for noise reduction in a motor vehicle that has a hybrid drive and includes an internal combustion engine and at least two electric machines including a first electric machine on a front axle of the motor vehicle and a second electric machine on a rear axle of the motor vehicle. The method includes automatically cutting in the at least two electric machines as a function of a required drive torque and an expected noise emission associated with the required drive torque, in a case of sole operation of the internal combustion engine, so as to reduce the load of the internal combustion engine. Torque distribution is carried out variably between the front axle and rear axle of the motor vehicle.

Noise reduction in motor vehicles with a hybrid drive

A drive system includes at least two drive devices, at least one of which is electric, that drive at least two drive axles, a power electronics system, an energy storage arrangement, and a control device. The control device includes a drive control module for providing a recuperation limiting value for each electric drive, a recuperation control module for combining the recuperation limiting values to form a maximum recuperation total limiting value, and a brake control module for providing a total braking torque requested by a driver or assistance system, such that it derives a recuperation total torque that is less than the recuperation total limiting value and also derives recuperation partial torques for each electric drive. In the case of a total braking torque that is greater than the recuperation total limiting value, the brake control module generates a hydraulic brake pressure and transmits it to the brake system.

Drive system for a motor vehicle and method for operating such a drive system

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Neuhausen/Schellbronn, Germany

Stefan Wimmer