Zf Friedrichshafen Ag

Fabian Ley

Jürgen Blaser

Mario Steinborn

Christian Mittelberger

Stefan Spühler

Stefan Blattner

Jochen Breuer

Sascha Fiesel

Dennis Wohlfahrt

Benjamin Berger

Thorsten Leim

Jens Winter

Wolfgang Rapp

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 a method for operating a multi-gear vehicle transmission having a plurality of shifting elements (A, B, C, D, E) for engaging the gears of the vehicle transmission, where, in a neutral gear an input (AN) and an output (AB) of the vehicle transmission are decoupled from one another, and where, in a driving gear the input (AN) and the output (AB) of the vehicle transmission are coupled to one another in order to propel the vehicle, by closing at least one shifting element (B). When the neutral gear is engaged, at least an actuation condition of a vehicle brake () and a transmission condition with elevated drag losses are detected, where, when the neutral gear is engaged, the shifting element (B) for the driving gear is vented if it is recognized that the vehicle brake () has been released and the transmission condition with elevated drag losses pertains.

Operation of a multi-speed vehicle transmission

Disclosed is a method for operating a multi-speed vehicle transmission having a plurality of shift elements (A, B, C, D, E) for engaging the gears of the vehicle transmission. The method includes decoupling between an input (AN) and an output (AB) of the vehicle transmission in a neutral gear, and coupling the input (AN) and the output (AB) of the vehicle transmission in a drive gear for propelling the vehicle by closing at least one shift element (B). At least one transmission state is determined when the neutral gear is engaged, where a shift element (D) for a reverse gear of the vehicle transmission is closed at least partially if the transmission is in a state with increased drag losses when the neutral gear is engaged.

Method and control apparatus for operating a multiple-speed vehicle transmission

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Friedrichshafen, Germany

Fabian Ley