liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Energy Efficient Fluid Power System for Mobile Machines with Open-centre Characteristics
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-6371-1390
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
2014 (English)In: 9th JFPS International Symposium on Fluid Power. Matsue, Japan, 28-31 October 2014, The Japan Fluid Power System Society , 2014, 452-459 p.Conference paper, Published paper (Other academic)
Abstract [en]

This paper presents a flexible and energy efficient system solution which mimics the behaviour of an open-centre system. An electro-hydraulic variable displacement pump and closed-centre valves are used. Instead of having a flow in the open-centre gallery, that flow is calculated using a pressure sensor and a valve model. The variable pump is then controlled in order to only deliver the flow that would go to the actual loads. It is also possible for the operator to decide how much load dependency there should be. The extreme case is not having any load dependency at all, resulting in a system where the pump displacement setting is controlled according to the sum of all requested load flows. It is thus possible to realize a system design with open-centre characteristics, a flow control system or something in between. Each operator can thereby get their optimal control characteristic while having high energy efficiency.

Place, publisher, year, edition, pages
The Japan Fluid Power System Society , 2014. 452-459 p.
Keyword [en]
Mobile hydraulics, energy efficiency, dynamics, damping
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-111819ISBN: 4-931070-10-8 (print)OAI: oai:DiVA.org:liu-111819DiVA: diva2:760718
Conference
9th JFPS International Symposium on Fluid Power, Shimane, Japan, 28-31 October 2014
Available from: 2014-11-04 Created: 2014-11-04 Last updated: 2016-05-17Bibliographically approved
In thesis
1. Mobile Working Hydraulic System Dynamics
Open this publication in new window or tab >>Mobile Working Hydraulic System Dynamics
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis deals with innovative working hydraulic systems for mobile machines. Flow control systems are studied as an alternative to load sensing. The fundamental difference is that the pump is controlled based on the operator’s command signals rather than feedback signals from the loads. This control approach enables higher energy efficiency and there is no load pressure feedback causing stability issues. Experimental results show a reduced pump pressure margin and energy saving potential for a wheel loader application.

The damping contribution from the inlet and outlet orifice in directional valves is studied. Design rules are developed and verified by experiments.

A novel system architecture is proposed where flow control, load sensing and open-centre are merged into a generalized system description. The proposed system is configurable and the operator can realize the characteristics of any of the standard systems without compromising energy efficiency. This can be done non-discretely on-the-fly. Experiments show that it is possible to avoid unnecessary energy losses while improving system response and increasing stability margins compared to load sensing. Static and dynamic differences between different control modes are also demonstrated experimentally.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2015. 85 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1697
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:liu:diva-121070 (URN)10.3384/diss.diva-121070 (DOI)978-91-7685-971-1 (ISBN)
Public defence
2015-10-02, A35, A-huset, Campus Valla, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2015-09-07 Created: 2015-09-04 Last updated: 2015-09-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Find book in another country/Hitta boken i ett annat land

Authority records BETA

Axin, MikaelEriksson, BjörnKrus, Petter

Search in DiVA

By author/editor
Axin, MikaelEriksson, BjörnKrus, Petter
By organisation
Fluid and Mechatronic SystemsThe Institute of Technology
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 1616 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf