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An Approach to Combine an Independent Metering System with an Electro-Hydraulic Flow-on-Demand Hybrid-System

Wydra, Marco; Geimer, Marcus; Weiß, Björn


By combining an electro-hydraulic flow-on-demand system with an independent metering of the actuators in- and outlet, a higher efficiency and a better controllability compared to conventional hydraulic-mechanic load sensing systems can be reached. It also enables the integration of a hydraulic accumulator to recuperate energy due to active loads. This paper presents an alternative control strategy for this kind of hydraulic propulsion systems. Connected with the pump and during passive loads the meter-in flow controls the velocity of the actuator. Otherwise the velocity control is achieved by the meter-out flow while the oil flows into the accumulator or tank. Exemplary this system is simulated for a mobile forestry crane. Further steps are building up a test bench for optimization and validation as well as an implementation into a real machine for testing the suitability in use.

Volltext §
DOI: 10.5445/IR/1000072317
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2017
Sprache Englisch
Identifikator urn:nbn:de:swb:90-723172
KITopen-ID: 1000072317
Erschienen in The 15th Scandinavian International Conference on Fluid Power, SICFP’17, June 7-9, 2017, Linköping, S
Externe Relationen Konferenz
Schlagwörter flow-on-demand, independent metering, control, recuperation, hybrid system
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