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URN: urn:nbn:de:swb:90-294757

Efficiency Optimization of a Hydrostatic System Using an Intermediate Pressure Line

Dengler, Peter; Dombrowski, René von

Abstract:
The paper introduces a new hydraulic system based on a constant pressure system with the aim to increase the efficiency of actuation of hydraulic cylinders in mobile machines. Using a third pressure level located between high pressure and tank pressure called intermediate pressure the system enables additional pressure potentials from high pressure to intermediate pressure and from intermediate pressure to tank pressure. This reduces throttle losses at hydraulic cylinders when driven at low or medium loads. An accumulator connected to the intermediate pressure line is being charged or discharged in function of which pressure potential is currently used. Using the example of a typical duty cycle of a wheel loader the paper describes how the accumulator can be applied in order to reach best efficiency results for the new system. A simulation shows that the demand of hydraulic energy of the new system is 13% lower than of a conventional Load Sensing system.


Zugehörige Institution(en) am KIT Institut für Fahrzeugtechnik und Mobile Arbeitsmaschinen (IFFMA)
Publikationstyp Proceedingsbeitrag
Jahr 2012
Sprache Englisch
Identifikator KITopen ID: 1000029475
Erschienen in 7th FPNI PhD Symposium on Fluid Power, June 27-30 2012, Reggio Emilia, Italy
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