Method for controlling a hydrostatic drive

Abstract

Method for controlling a drive of a working machine, in particular a drive of a compaction machine (10), comprising a travel drive and a vibration drive, wherein the drive has at least three hydraulic machines (21, 31, 41), of which a first hydraulic machine (41) is coupled to a drive machine (43), a second hydraulic machine (21) is part of a travel drive and a third hydraulic machine (31) is part of a vibration drive, wherein the at least three hydraulic machines are fluidically connected on the one hand via a working line (50) and on the other hand with a pressure medium sink (12) and each is designed with a displacement volume adjustable to zero, such that the power of the first hydraulic machine (41) is divisible into a vibration power for the third hydraulic machine (31) and into a travel power for the second hydraulic machine (21), wherein they each have an electro-hydraulic adjustment unit (13, 14) for adjustment.the procedure comprises the following steps: , a. Obtain (91) a target drive request for the drive system of the working machine; b. Obtain (92) a target vibration requirement for the vibration drive of the working machine; c. Determine (93) the power available through the drive engine (43) and / or through the first hydraulic engine (41); d. Determining the driving performance (99) and the vibration performance (98) taking into account the available power determined in step c and the requirements obtained in steps a. and b.; characterized in that in step d. the obtained target vibration requirement is prioritized so that the requested vibration can be produced.

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