Zf Friedrichshafen Ag

Christoph Braun

Thilo Schmidt

Klaus Steinhauser

Christian Popp

Josef Loibl

Ingo Lippenberger

Stefan Hakspiel

Frank Schneider

Dominic Bezikofer

A control unit is provided, in particular a transmission control unit, which is designed to be attached to an outer side or to an inner side of a housing, in particular to a transmission housing, wherein the control unit comprises a circuit board as well as at least one plug which is arranged on the circuit board and whose pins are connected to corresponding conducting paths of the circuit board, which is arranged in such a way that it reaches into an opening within the housing and to produce an electrical and/or signal connection between the outer side and the inner side of the housing via conducting paths that are arranged on the circuit board, wherein an overmolding is enclosing at least the circuit board and the plug(s).

Control unit

A component of a transmission device, which rotates around a central axis and is adjustable in an axial direction, includes with an encoder contour on the circumference of the component that interacts with a sensor device. The encoder contour features at least one area provided for calculating the axial position of the component, whereas a surface of the first area is designed with a varying radial extension along the axial direction relative to the central axis. The encoder contour has second areas for calculating the rotational speed of the component, whereas a slope of a radial surface of the second areas in the axial direction is differentiated from a slope of the surface of the first areas in the axial direction. In the circumferential direction of the component, the encoder contour is designed alternately with first areas and second areas.

Component part, device and method for determining an axial position of a component part and for determining a rotary speed of the component part

A method of operating a valve system of a transmission comprising part of the vehicle drive train through a valve unit and said valve unit's electro-magnetic activator configuration. In a transmission's hydraulic system and is part of the vehicle drive train, its hydraulic pressure value (p_EDS) can be employed and adjusted through a valve unit configuration by applying a pulse-width-modulated current signal (i_EDS) to the electro-magnetic activator system. The pulse-width modulated current signal (i_EDS) and its amplitude (A) and/or its pulse duration (pw) will periodically change, during the applied Dither-Modulation, by maintaining the required pressure value (p_EDS) at the same time, whereby a lengthwise movable anchor, which is attached a valve shaft of the valve system, receives hereby an imposed vibrating oscillation. According to the invention, the Dither-Modulation is activated or deactivated during pre-defined operating conditions of the vehicle drive train.

Method of operating a transmission system valve configuration

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Uhldingen-Muehlhofen, Germany

Christoph Braun