Decentralized Hydraulics for Micro Excavator

Shuzhong Zhang, Tatiana Minav, Matti Pietola

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Environmental restrictions and economic opportunities create demand to investigate the potential of further hybridization of non-road mobile machinery (NRMM). Many proposals for energy saving in hydraulic systems have been researched. In addition to well-established methods, there are zonal or decentralized hydraulics – an approach first introduced in the aircraft industry. In a fully decentralized system, the hydraulic pumps are disconnected from the engine and replaced with hydraulic power packs distributed throughout the system. In this study, decentralized hydraulics are realized with a direct driven hydraulics drive (DDH). By applying DDH, further hybridization can be achieved which will lead to increased productivity, minimized energy consumption, and robust performance in mobile machines operating in various environments. Therefore, the aim of this paper is to investigate the energy efficiency of the excavator hydraulic system equipped with DDH under typical digging cycles. For this purpose, a model which coupled multi-body dynamics, hydraulic system, and an electric motor is developed in the Matlab Simulink environment. Simulation results are validated by a simplified representation of micro excavator (one example of DDH) as a proof of concept.
Original languageEnglish
Title of host publicationProceedings of the 15th Scandinavian International conference on fluid power, SICFP'17
Subtitle of host publicationFluid Power in the Digital Age
EditorsPetter Krus, Liselott Ericson, Magnus Sethson
PublisherLinköping University
Number of pages9
ISBN (Electronic)978-91-7685-369-6
Publication statusPublished - 7 Jun 2017
MoE publication typeA4 Article in a conference publication
EventScandinavian International Conference on Fluid Power - Lindköping, Sweden
Duration: 7 Jun 20179 Jun 2017
Conference number: 15

Publication series

NameLinköping Electronic Conference Proceedings
PublisherLinköping University
ISSN (Print)1650-3686
ISSN (Electronic)1650-3740


ConferenceScandinavian International Conference on Fluid Power
Abbreviated titleSICFP

Fingerprint Dive into the research topics of 'Decentralized Hydraulics for Micro Excavator'. Together they form a unique fingerprint.

  • Cite this

    Zhang, S., Minav, T., & Pietola, M. (2017). Decentralized Hydraulics for Micro Excavator. In P. Krus, L. Ericson, & M. Sethson (Eds.), Proceedings of the 15th Scandinavian International conference on fluid power, SICFP'17: Fluid Power in the Digital Age (pp. 187-195). (Linköping Electronic Conference Proceedings; No. 144). Linköping University.