Zf Friedrichshafen Ag

Dennis Wohlfahrt

Christian Mittelberger

Stefan Blattner

Thorsten Leim

Mario Steinborn

Kai Bornträger

Stefan Spühler

Jochen Breuer

Harry Nolzen

Benjamin Berger

Fabian Ley

Stefan Bemetz

Hannes Werner

A method for operating a motor vehicle () having at least one driven axle () with a locking differential (), where when the motor vehicle () is driving and the locking differential () concerned is engaged on at least one driven axle (), it is checked whether the motor vehicle is driving round a curve. If it is found that the motor vehicle is driving round a curve, the engaged locking differential () is actuated to disengage it and it is checked whether the locking differential () concerned has in fact been disengaged. If it is found that the locking differential () concerned has not been disengaged, the wheel of the driven axle () concerned on the outside of the curve is braked.

Method and control device for operating a motor vehicle

Disclosed is an electric vehicle transmission (&#x2033;) comprising a drive input shaft (), a drive output shaft (), a first planetary gearset (), and a second planetary gearset (). The drive input shaft () is provided for connection to an electric machine (), where each of the first planetary gearset () and the second planetary gearset () includes a first element (), a second element () and a third element (), respectively. A first shifting element (A) and a second shifting element (B') are provided, by the selective actuation of which the drive input shaft () can be connected to the drive output shaft () by means of the planetary gearsets () by engaging a gear. Also disclosed is a drive module (&#x2033;) with such an electric vehicle transmission (&#x2033;) and a method for operating an electric vehicle transmission (&#x2033;).

Electric vehicle transmission

A method for operating an automatic transmission () of a motor vehicle in which a hydraulic pump, associated with a hydraulic system, for supplying pressure in the hydraulic system is driven by a drive engine and in which hydraulic shifting elements (B, B, B, C, C) are actuated to engage gear steps. According to the method, before the drive engine is turned off for a short duration of time, at least one non-actuated shifting element (B, B, B, C, C) of the automatic transmission () is actuated or filled with pressure oil.

Method for operating an automatic gearbox of a motor vehicle

A method of operating an automatic transmission of a motor vehicle, in which a hydraulic pump associated with a hydraulic system for the supply of pressure is driven by a drive motor. When the motor vehicle starts, a hydrodynamic starting element forms a driving connection between the drive motor and the automatic transmission. Hydraulic shifting elements (B, B, B, C, C) are actuated for engaging gear steps. When the drive motor is started, a shifting element (B, B, B, C, C) of the automatic transmission is engaged, and, during the engagement process of the shifting element (B, B, B, C, C), a time of a rotational speed variation (n, n) of the automatic transmission is determined. With the help of the determined rotational speed variation (n, n), a time point is determined at which a pressure present in the hydraulic system reaches or exceeds a target pressure level.

Method for operating an automatic transmission of a motor vehicle

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Meersburg, Germany

Dennis Wohlfahrt