Importance

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Abstract

The invention relates to an apparatus having a plurality of hydraulic actuators (S_i) and a piston-cylinder unit (K), one working chamber (AK₁) of which is connected, via at least one hydraulic connection line (HL) and supply lines (ZL_i), to working chambers (AS_i) of the hydraulic actuators (S_i), wherein each working chamber (AS_i) of a hydraulic actuator (S_i) is connected to a supply line (ZL_i) and switch valves (EV_i) for selective opening and closing of the hydraulic supply lines (ZL_i) are provided such that, in the opened position of the associated switch valve (EV_i), a pressure change in the working chamber (AS_i) of the actuator (S_i) or an adjustment of the actuator (S_i) can occur, wherein at least one pressure sensor (DS_i) for determining the pressure in a working chamber (AS_i) of an actuator (S_i) or a hydraulic line (HL, ZL_i, AL_i) and a control device (ECU) is provided, characterized in that, for simultaneous pressure change in at least two actuators, (S_i, S_k), the (ECU) permanently opens the switch valve (EV_i) associated with a first actuator (S_i) during the pressure change phase and adjusts or regulates the pressure by adjusting the piston (KK) of the piston-cylinder unit (K), and in that the control device (ECU) adjusts or regulates the pressure in at least one additional actuator (S_k) by means of the switch valve (EV_k), which is clocked during the pressure change phase, and in particular is controlled by pulse width modulation.

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First Claim