Zf Friedrichshafen Ag

Jörg Geis

Jürgen Legner

Eckehard Münch

Mauro Cesar Zanella

Torsten Berg

Uwe Heitz

Manfred Sieger

Eckehard MÜNCH

The shift sequence for a transmission ratio change of a vehicle drive train is determined depending on an operating state of the vehicle drive train existing upon the actual transmission ratio of the transmission device. The operating state is characterized by various operating state quantities of the vehicle drive train, which represent input quantities of a model representing the vehicle drive train. Output quantities of the model supply at least one target value that determines the shift sequence in terms of characterization and application as input quantities of an optimization routine, by which a minimization of the functional connection of at least one target value is carried out. The torque characteristics representing the shift sequence of devices of the vehicle drive train are determined depending on the minimum of the functional connection of at least one target value, taking into account the limits of the operating state quantities.

Method for determining the shift sequence of a change of transmission ratio of a transmission device in a vehicle drive train

A hydrostatic transmission that is operated in an open loop by way of an adjustable hydraulic motor (), which is adjusted for the purpose of acceleration or deceleration with the aid of an electronic control unit () such that a desired vehicle speed corresponds to a measured vehicle speed.

Hydrostatic transmission

Growing community of inventors

Markdorf, Germany

Jörg Geis