Controlling system for a hydrostatic machine

摘要

A regulator for an adjustable hydrostatic machine (1) having a hydraulic servo controller (4) for continuous variation of the displacement volume, with a valve device (16, 18) for controlling or regulating the servo controller (4) in dependence on the displacement volume and/or working pressure of the hydrostatic machine (1) and a second regulating valve (15) for regulating the servo controller (4) in dependence on the displacement volume, is arranged so that it can be operated without significant regulating losses in the working stream. This is done by providing a third control valve (48), controlled in dependence on the control movement of the servo controller (4), to control the pressure acting on the second regulating valve (15).