Zf Friedrichshafen Ag

Ünal Gazyakan

Christoph Pelchen

Barbara Schmohl

Detlef Baasch

Rudolf Schneider

Johannes Kaltenbach

Gerhard Gumpoltsberger

Uwe Griesmeier

Ulrich Mair

Karl-Hermann Ketteler

Claus Granzow

Hartmut Werries

Dieter Beck

Michael Erenhoch

A method for controlling of a drive train of a vehicle having a multi-group transmission, an output mechanism and a control apparatus for the regulation of the drive train. The multi-group transmission consists of an automatic transmission and a range group. To change the ratio of the range group the drive train is relieved of load; a shifting element of the range group is closed; a shifting element of the range group is synchronized and opened; and a ratio of the automatic transmission is so altered that a change of the ratio of the multi-group transmission is less than in a case of an individual alteration of the ratio of the range group.

Method for controlling a drivetrain of a vehicle

A method for controlling a drivetrain () in a motor vehicle is disclosed, in particular in an off-road vehicle with a drive unit (), a multi-group transmission () and an output. The multi-group transmission () comprises at least an automatic gearbox () and a subsequent range transfer box () which may be switched by means of switching elements (). On changing the ratio in the range transfer box (), a synchronisation of the switching element (or), for switching in the range transfer box (), is carried out by means of a controller of switching elements in the automatic gearbox ().

Method for controlling a drivetrain in a motor vehicle

A distributor transmission () having at least three shafts () for distributing a drive torque (M_GE) as needed to at least two drive axles (). A first shaft () is operatively connected with the first drive axle () and can be loaded with the drive torque (M_GE). The second shaft () is operatively connected with the second drive axle () and a torque (M_E) of a machine device () on a third shaft () can be applied which influences a degree of distribution (P_VA/P_GES) of the drive torque (M_GE) between the drive axles ().

Distributor transmission having at least three shafts

A transfer case () with controllable clutch () for a motor vehicle, especially for a motor vehicle with part-time four-wheel drive, for distributing a driving torque coming in via a drive shaft () to at least two output shafts (). Hereby the output shaft () can be connected to the drive shaft () via the clutch (), and the clutch () can be actuated via an electric motor () and a drive converter device () that is arranged between the electric motor () and the clutch () for converting a rotatory motion of the electric motor () into a translatory actuating motion for the clutch (). The electric motor () is hereby designed as an induction motor.

Transfer case with controllable clutch

A distributor gear () with an adjustable coupling device () for a vehicle, in particular for a vehicle with a shiftable all-wheel drive is described for the distribution of an incoming drive torque via a drive shaft () to at least two output shafts (). It is moreover provided that an output shaft () can be connected via the coupling device () with the drive shaft () and that the coupling device () can be actuated via an electric motor () and a drive converter device () located between the electric motor () and the coupling device () for the conversion of rotary movement of the electric motor () into a translatory actuation movement for the coupling device (). The electric motor () is incorporated into a gear ().

Distributor gear with adjustable coupling

In an electromagnetically actuated dual clutch-brake combination (), a drive input shaft () can be optionally engaged in drive connection with a first drive output shaft () or with a second drive output shaft (). The second drive output shaft () is associated with an electromagnetic brake (), which is provided in order to immobilize the second drive output shaft (), whereas the first drive output shaft () can still be connected to the drive input shaft () by an electromagnetic clutch (). The electromagnetic dual clutch-brake combination is suitable for controlling a variable longitudinal differential lock and a shiftable range gear system of an all-wheel distributor gearbox, with only a single electric motor.

Electromagnetically actuated dual clutch-brake combination

A device for guiding torque of one drive shaft () connected with a driving appliance () onto a first or a second output shaft (). A torque fed via the drive shaft () can be applied, respectively, to one of the two output shafts () depending on a control of a changeover device (). The changeover device () comprises one electromagnetic clutch () which can produce a power flow between the drive shaft () and the first or the second output shaft (or). The electromagnetic clutch () comprises a coupling element () which is guided and displaced in an axially and rotatable manner and is fixedly connected with the drive shaft () and depending on a current supply of the electromagnetic clutch () produces the power flow between the drive shaft () and the first or the second output shaft (or).

Device for guiding a driving torque

An auxiliary transmission () with controllable clutch () is described for the optional distribution of a drive output torque to one or more drive output shafts with a reduction gear stage () and with a hydraulic pump (). The hydraulic pump () is arranged on a transmission input shaft () and the reduction gear stage () is connected in series in such manner that the drive input power to the hydraulic pump () remains at least approximately the same when a range change takes place in the reduction gear stage ().

Auxiliary transmission with controllable clutch

A steering system with at least one steering wheel actuator and at least one steering actuator which are connected to each other via a controlled system. Minimal steering impulses being superimposed in order to be able to determine the steering tie rod forces that occur.

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Friedrichshafen, Germany

Ünal Gazyakan