Zf Friedrichshafen Ag

Norbert Sommer

Bernd Somschor

Manfred Sieger

Oliver Buchhold

Frank Miehle

Jürgen Neuenfeld

Karl Kühner

A transmission () for a motor vehicle () with a housing () and a shifting apparatus arranged therein and with an electromechanical transmission actuator () with a first electric motor () for exercising a selection motion of the shifting device with a second electric motor () for exercising a shifting motion of the shifting apparatus and with a control unit () for receiving sensor signals, for processing the sensor signals and for emitting control signals to the electric motors () the axis of rotation of the first electric motor () and the axis of rotation of the second electric motor () lie parallel to each other.

Gearbox comprising an electromechanical actuator

A mobile vehicle comprising a shiftable transmission with fixed gear ratio steps and a controllable friction clutch contains a distance sensor, which is connected to an inch pedal and in which the starting position and the end position of the inch pedal are adjusted by an electronic control unit and allocated to an inch effect from 0% to 100%. Due to the electronic adjusting process of the inch pedal path via the inch effect and the service brake, the intersecting time between the service brake and the actuating force of the clutch can be adjusted. The driving comfort of the vehicle is increased and the risk of damage to the multi-disk clutch is reduced.

Mobile vehicle comprising a friction clutch and an inch pedal

The invention concerns a method for reducing wheel slippage of a motor vehicle with at least one axle ( ), on the ends of which steerable wheels ( ) are rotatingly placed, and with at least one axle ( ) on which wheels ( ) are driven by a differential drive ( ), whereby, in case of a wheel slip of one of the wheels of a driven axle ( ), a brake ( ) assigned thereto or a differential slip control is activated and controlled. In order that the traction and the driving stability of the motor vehicle are improved by a simple mechanism, the proposal is that the speeds of rotation of the wheels ( ) are determined, that from the speed of rotation of the wheels ( ) on the right vehicle side and of the wheels ( ) on the left vehicle side of an axle ( ), and from use of vehicle parameters, a virtual curve radius (r ) is computed, that the steering angle (&agr; , &agr; ) of the steerable wheels ( ) of an axle ( ) is computed, that a desired-radius (r ) is computed from an average steering angle &agr; of the wheels ( ) or from a corresponding steering angle of a steering gear ( ) by the use of vehicle parameters, that the virtual curve radius (r ) is compared with the desired radius (r ) and that the results for formation of a characteristic value serves to activate an assigned brake ( ) or to activate a differential slip control of a differential drive ( ).

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Baienfurt, Germany

Norbert Sommer