Daimler Ag

Daimler Chrysler Ag

Robert Boschgmbh

Bmw Ag

Norbert Ebner

Harald Braun

Franz Nietfeld

Helmut Suelzle

Fritz Schmidt

Anton Rink

Torsten Scholt

Andreas Schondelmaier

Matthias Spaeth

Michael Schopper

Manfred Schmid

Deborah Mowll

Xaver Laufenberg

Michael Fischer

Pascal Heusler

Alexander Thiel

Christian Myrzik

Miriam Neuser-Hoffmann

Stephan Usbeck

Dominique Eynius

An electrical device having a generator, e.g., for use in the vehicle electrical system of a motor vehicle, includes a controller for controlling the generator voltage. In the device, an area is provided in which a voltage control is carried out, and other areas are provided in which a torque control is carried out.

Electrical device and operating method

In a drive train of a motor vehicle comprising an internal combustion engine, at least one electrical machine which can be operated at least as a motor or as a generator, and a stepped automated manual transmission and at least one control device for controlling the internal combustion engine, the at least one electrical machine (P, P) and the stepped automated manual transmission and a method of operating the drive train, a braking torque on the driven wheels is kept approximately constant before, during and after a gear-shifting operation to a gear with a higher transmission ratio so as to avoid any jerks during such down shifting procedure.

Motor vehicle drive train and method for controlling a drive train

In a drive train and a method for operating the drive train for a motor vehicle, comprising a hydraulically shiftable transmission unit with an input shaft connectable to an internal combustion engine via a first clutch, a first electric motor, and an oil pump which supplies the transmission unit with pressurized oil and which is driven by the internal combustion engine or by an electric pump motor, the electric pump motor for driving the oil pump is in the form of a sensorless electric motor, and if required, the first electric motor is energized and coupled to the oil pump in order to assist starting the electric pump motor.

Drive train

In a motor vehicle having an internal combustion engine which has an automatic start/stop device, and a controllable brake device at the start of and during an automatic stop phase, the effect of a braking torque which is greater than a threshold value is ensured. For this purpose, the brake device can increase the braking torque. The threshold value is previously calculated in such a way that the motor vehicle is reliably prevented from rolling away. As a result, the internal combustion engine can be stopped frequently, and at the same time unintentional rolling away of the motor vehicle during the stop phase can be avoided.

Method for operating a motor vehicle

Device and method for operation of at least one electrical machine for a motor vehicle. In order to coordinate torque requirements for the propulsion system and voltage requirements for the vehicle power supply system and at least one battery for the vehicle power supply system, a voltage reference variable is formed for the voltage requirements for the vehicle power supply system, and a torque reference variable is formed for the torque requirements of the propulsion system. The voltage reference variable is limited by upper and lower torque limit values which must not be overshot or undershot in the event of changes to the voltage reference variable. The torque reference variable is limited by voltage limit values which must not be overshot or undershot in the event of torque changes.

Device and method for operating an electrical machine for a motor vehicle

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Ludwigsburg, Germany

Norbert Ebner