Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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
Physical Modelling and Automatic Configuration of CES Valve
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.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis has been performed at Öhlins Racing AB which is known world-wide for its high quality racing shock absorbers. Öhlins have been developing shock absorbers for more than 30 years and in addition to this they also develop a technology for semi-active suspension.

Semi-active suspension technology makes it possible to achieve an intelligent and dynamic vehicle chassis control. Compared to standard passive suspensions, semiactive dampers allow improving vehicle cornering performance while still providing good comfort when cruising. This is achieved by a real time adjustment of the suspensions damping characteristics.

Öhlins system for semi-active suspension is called CES (Continuously controlled Electronic Suspension). The systems consist of electronically controlled hydraulic valves for uniflow dampers. These valves are mounted on all four dampers of the vehicle and are controlled individually to provide the desired ride quality. The valves are configurable to suit many types of vehicles by changing internal parts.

The first goal of this thesis project was to study the behaviour of the CES valve and uniflow damper. In order to achieve this a simulation model was created using Hopsan which is a 1-dimensional multi-domain modelling tool developed at the division of Fluid and Mechatronic Systems at Linköping University. The model considers mechanical forces from for example springs together with hydraulic forces. It was validated against static and dynamic measurements made in a flow bench and a dynamometer.

The second goal was to use the simulation model as part of a tool that configures the CES valve according to a requirements specification. To achieve this goal a method of estimating the characteristics of the internal damper valves was developed. This estimation method, together with the simulation model, was used to choose the best valve configuration by using weighted least-squares. The result is presented in a Matlab-based graphical user interface.

Place, publisher, year, edition, pages
2012. , 72 p.
Keyword [en]
CES valve semi-active suspension hydraulic valve solenoid
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-79261ISRN: LIU-IEI-TEK-A-12/01305-SEOAI: oai:DiVA.org:liu-79261DiVA: diva2:539767
External cooperation
Öhlins Racing AB
Subject / course
Fluid and Mechanical Engineering Systems
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-08-06 Created: 2012-07-05 Last updated: 2012-08-06Bibliographically approved

Open Access in DiVA

fulltext(1347 kB)570 downloads
File information
File name FULLTEXT01.pdfFile size 1347 kBChecksum SHA-512
fbcdfb5f3f60b0c146e424ff0e91b178764f98beb6bef67ff3ec82fc3b2c2f80504fcecdb629a1785ecc6541710bc928c9a15e20bf4f695026c3ba93ef947abd
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Gällsjö, AndersJohansson, Mattias
By organisation
Fluid and Mechatronic SystemsThe Institute of Technology
Other Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 570 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 369 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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