Robert Boschgmbh

Rolf Springmann

Joern Howind

Carola Diebold

An adjustment apparatus for a pivot cradle of an axial piston machine includes an actuating piston configured to enable the pivot cradle to be pivoted about a pivot axis. The actuating piston delimits an actuating chamber by which pressure medium is configured to be applied to the actuating piston. The charging of pressure medium to and the discharging of pressure medium from the actuating chamber is controlled by a regulating valve. The regulating valve has a regulating piston configured to be adjusted by a solenoid. The regulating piston and the actuating piston are mechanically coupled to one another. Current is supplied to the solenoid depending on a setpoint pivot angle of the pivot cradle and depending on the previous state of the setpoint pivot angle, thereby largely reducing hysteresis effects of the solenoid.

Adjustment apparatus for a hydrostatic piston machine, and hydrostatic piston machine having an adjustment apparatus of this kind

An adjustment device for a pivoting cradle of a hydraulic machine, in particular of an axial piston machine, is disclosed. Said adjustment device has an actuating piston to which pressure medium for pivoting the pivoting cradle about a pivoting axis is applied via an actuating pressure space. In order to control the feeding in of pressure medium and the relieving of the actuating pressure space, a control valve is provided. Said control valve has a control piston configured to be adjusted by an electric actuator, wherein the electric actuator is controlled by a control device. In this context, the control device controls the electric actuator as a function of a control difference formed from a setpoint pivoting angle and an actual pivoting angle of the pivoting cradle. The actual pivoting angle of the pivoting cradle is fed back electrically to the control device here.

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Sulz-Hopfau, Germany

Rolf Springmann