Zf Friedrichshafen Ag

Markus Ulbricht

Mario Steinborn

Robert Ingenbleek

Armin Brentel

Kim Führer

Andreas Graf

Stefan Renner

Josef Bader

Karl-Fritz Heinzelmann

Ludger Ronge

Michael Pantke

Reiner Keller

Gerhard Birkenmaier

Gerhard Höring

Kai Heinrich

Thomas Puth

Frank Gessler

Hubert Konig

Henrik Schuh

Martin Rist

Bernhard Walter

Klaus Wöhr

Hubert König

Raphael Baumann

Manfred Vetter

An assembly () for actuating a transmission brake () that has a transmission brake cylinder (), at least one control valve () for controlling pressurizing and/or exhausting of the transmission brake cylinder (), and at least one pressure line () via which the at least one control valve () is connected to the transmission brake cylinder () to supply a pressure medium () to and discharge the pressure medium () from a pressure chamber () of the transmission brake cylinder (). The assembly () includes a quick-exhaust valve (), which is arranged in the pressure line () between the transmission brake cylinder (), and the at least one control valve ().

Control arrangement for a transmission brake with a quick exhaust valve

The invention relates to an electromagnetic actuator and a valve having such an actuator. The actuator has a first magnetic coil and a second magnetic coil, as well as at least one permanent magnet and an anchor that can be moved axially by the magnetic coils and the permanent magnet between a first and a second position, on which at least one spring device acts in the axial direction. The first and second magnetic coils as well as the first permanent magnet are disposed axially behind one another thereby, such that the first permanent magnet is disposed coaxially between the first and second magnetic coils.

Electromagnetic actuator and valve

A transmission system for either a manual shift transmission, an automatic transmission or an automated transmission in which the electrical connections and the pneumatic connections including any ventilation port, for the internal components of the transmission are combined with one another so as to exit the transmission housing via a single unified connection formed in the housing wall of the transmission.

Transmission system

A transmission control having an electronic control unit (), at least one mechatronic component (), and a housing () comprising an upper housing part (), a lower housing part (), and a central housing part (). These housing parts together form at least one receiving space () for the control unit () and/or the mechatronic component () which is arranged between the upper housing part () and the lower housing part (). The control unit () and/or the at least one mechatronic component () are fastened on the upper housing part (). A process for installation of a transmission control () is also disclosed.

Transmission control and method for mounting a transmission control

A control device for and a method of controlling a gearbox having a pressure-limiting device connected to a pressure medium source. A first controllable valve device is connected downstream of the pressure-limiting device and an actuating device is connected further downstream and adjusts the gearbox. A second controllable valve device is connected directly to the pressure medium source, via a supply line, and another actuating device is connected downstream of the second controllable valve device. An electric control device is provided for actuating the controllable valve devices and a sensor is connected to the electric control device for measuring pressure of the pressure medium in the supply line. The electric control device is connected to the second controllable valve device such that the second controllable valve device and the further actuating device are controlled by the pressure of the pressure medium in the supply line.

Control device for a gearbox and method for controlling a gearbox

A method and device for actuating a shifting arrangement with electric actuators of a transmission control of a motor vehicle. The method includes determining a total current of the shifting arrangement available at a point in time, detecting shift requests of shift elements and compared these with the total available current. Shift requests are then tested according to preset priorities and the sequentially performed according to the priority test. The method avoids exceeding a preset allowed current load, when the requested shifts would exceed the total available current. If the total available current would not be exceeded by the requested shifts, the requests are carried out. A device is also provided in the shifting arrangement which has control and detection mechanisms that monitor current and control the current flow.

Method and device for triggering a circuit arrangement with electric actuators

A method and a device for controlling a fluid-actuated control system of an automatic or automated transmission of a motor vehicle, which has at least one pressure medium source, at least two control elements that are actuated by pressurized fluid and a control device for controlling the fluid-actuated control system. A further control module is used to reduce; the number and power consumption of valves that are actuated simultaneously to control the control elements; and the mechanical loading of the control elements (). The control module reads signals concerning at least one current control action and, in accordance with predetermined patterns, calculation rules and/or models, generates signals that cause non-switched control elements to be manipulated by pressurized working fluid.

Method and device for controlling a fluid-actuated control system

A method and device for controlling a fluid-actuated control system, to optimize post-switching times for actuation of control elements in such systems. The system includes at least one pressure medium source, at least one hydraulically controlled control element and a device for controlling the fluid-actuated control system. The optimum post-switching time after hydraulic actuation of the control element, depends on a number of different factors such as a control-element-specific parameter, a specific mounting location of the control element, at least one operating parameter of the fluid-actuated control system and/or of the vehicle. A post-switching time control device controls and/or regulates at least the duration of a post-switching time of the at least one control element and with the above factors determines the post-switching time.

A transmission brake () is described, where one transmission shaft () can be braked to carry out an upshift operation. The aim of the invention is to provide a transmission brake that is devoid of any hydraulic or pneumatic actuation device and that requires very little axial installation space. Such a transmission brake () has one electromagnetic actuation device () with which the friction elements () of the transmission brake () can be pressed against each other for actuating the brake.

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