Robert Boschgmbh

Brueninghaus Hydromatik Gmbh

Michael Frasch

Karl-Heinz Vogl

Peter Dschida

Matthias Mueller

Steffen Mutschler

Grit Geissler

Ulrich Lenzgeiger

Ronny Herrmann

Heinz Hense

Erich Ilk

Franz Werner

Frank Riggenmann

A hydrostatic travel drive includes a hydraulic pump for the purpose of supplying pressure medium to a hydraulic motor of the travel drive that can be coupled to an output, which pump can be coupled to a drive machine. The hydraulic pump has an actuating cylinder with at least one cylinder chamber and a swept volume which can be adjusted via the actuating cylinder, and at least one electrically activatable pressure valve via which the cylinder chamber can be charged with an adjustingly active actuating pressure. The travel drive further includes device via which a pressure of the hydraulic pump can be limited by means of influencing the actuating pressure.

Hydrostatic travel drive and method for controlling the hydrostatic travel drive

The invention relates to a method for changing gear stages in a transmission having a hydrostatic transmission and a downstream manual transmission, and a corresponding transmission arrangement. First, a desire to shift is detected within the manual transmission to change the gear stages. The hydrostatic transmission and the downstream manual transmission are activated to change the gear stage of the downstream transmission. Whether the gear stage to be engaged through a gear stage change was successfully engaged is detected by a detection device, which is connected to an electronic control unit of the transmission arrangement. If the engagement of the gear stage to be engaged is not successful, the original gear stage is reengaged. After the engagement of the original gear stage, the downstream transmission is again activated such that the gear stage to be engaged is engaged.

Method for changing gear stages and transmission arrangement

A hydrostatic drive, especially a hydrostatic fan drive, includes a hydraulic constant-displacement pump configured to drive a hydraulic motor for a fan. The drive further includes a hydraulic machine configured to supply a second hydraulic circuit with a pressure medium. The constant-displacement pump is configured to be hydraulically combined with the hydraulic machine.

Hydrostatic drive

The invention concerns a method and a transmission arrangement for changing gears in a transmission with a hydrostatic transmission and a manual gearbox () connected downstream from it. First the output torque of a hydrostatic motor () is reduced. After the reduction of the output torque of the hydrostatic motor (), an engaged gear () of the manual gearbox () which is connected downstream is disengaged. An output rotational speed of the hydrostatic motor () corresponding to the gear () to be engaged is determined. The gear ratio of the hydrostatic transmission is then adjusted, so that the output rotational speed of the hydrostatic motor () is higher than the determined corresponding output rotational speed. After this increased output rotational speed is reached, the gear () to be engaged is engaged.

Method and transmission arrangement for changing gears

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Ulm, Germany

Michael Frasch