Hydraulic circuit arrangement with a device for a zero stroke pressure regulation and method for regulating the pressure in the zero stroke

摘要

The invention relates to a hydraulic circuit arrangement for the adjustment of the delivery volume of a pump, with an electrically controllable control valve unit, with the alternating an active side of a servo system, can be charged with pressure and at the same time its passive side to the tank can be relieved, as well as with a device for zero stroke-pressure control, which comprises zero stroke valves, by means of which the working lines of the pump can be connected with the servo conduits. For reducing the servo-pressure loading, and improvement of the reaction time, in the direction of the servo system blocking non-return valves are provided, by means of which the two power sites via a relief line can be connected in each case with feed pressure. The device for zero stroke-pressure control, in addition, comprises a supporting aperture, which, in a line leading to the passive servo-side can be positioned. The invention also relates to a method for regulating the pressure in the zero stroke.