Zf Friedrichshafen Ag

Eckhardt Luebke

Johannes Kaltenbach

Matthias Reisch

Ralf Dreibholz

Bernard Hunold

Juergen Wafzig

A transmission ratio step of a stepped transmission which can couple at least two parallel transmission shafts. Multiple transmission ratios can be implemented with the ratio steps. A planetary gear set, comprising three components, is located coaxial with a first shaft. A first component is connected to and driven by an input supplied along the first axis, and a second component meshes with at least one spur gear, each of which is placed on a further axis that is parallel to the first axis. A first transmission ratio can be engaged by fixing a third component of the planetary gear set, and a second transmission ratio can be implemented by connecting either the third or the second transmission component to the drive supplied along the first axis. At least one the transmission ratio steps is utilized in a stepped transmission of a motor vehicle transmission.

Ratio step of a stepped transmission, and stepped transmission

An actuating assembly for actuating synchronizing elements of a centrally synchronized dual-clutch transmission having at least a first part-transmission () and a second part-transmission () such that at least one synchronizing element is associated with each of the first and the second part-transmission (). A common actuator () is provided for actuating at least the synchronizing elements of the two part-transmissions.

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Friedrichshafen, Germany

Eckhardt Luebke