Zf Friedrichshafen Ag

Matthias Duller

Simon Geiger

Stephan Schinacher

Matthias Madlener

Hans Höfler

Joachim Sauter

Norbert Brugger

The invention relates to a method for accelerating a vehicle with a continuously variable transmission () where a gear ratio of the transmission is at first larger than a gear ratio of a virtual fixed gear. While the vehicle is accelerating, the gear ratio of the transmission is increased to the gear ratio of the virtual fixed gear. The transmission is then operated with the gear ratio of the virtual fixed gear.

Acceleration with virtual gear ratios from low speeds

A method of controlling a drive device of a construction machine with a split transmission, which is at least coupled, at an input side, to a drive force source and, on the output side, with a drive range change transmission so as to set at least two shiftable drive ranges. The method includes a detection step (S) for detecting drive dynamic requests for operation of the construction machine and a determination step (S) for determining whether a drive dynamic request with an increased drive dynamic is present. If a drive dynamic request with increased drive dynamics is determined, then a shifting step (S) is executed for shifting the drive range change transmission from a second, of the at least two drive ranges, to a first of the at least two drive ranges, to achieve increased driving dynamics of the construction machine.

Method for controlling a drive device of a construction machine

A method of starting or holding a mobile vehicle and, in particular, a working machine. The method determines whether the vehicle is rolling backward on an inclined surface and, as a function of that knowledge, the rotational speed of the drive engine is increased, or a downshift by one gear is carried out in the transmission.

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Friedrichshafen, Germany

Matthias Duller