Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves
Dissertation (MEng)--University of Pretoria, 2015.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2018
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613550823866368 |
|---|---|
| access_status_str | Open Access |
| author2 | Els, P.S. (Pieter Schalk) |
| author_browse | Els, P.S. (Pieter Schalk) |
| author_facet | Els, P.S. (Pieter Schalk) |
| collection | Thesis |
| dc_rights_str_mv | © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/66198 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:56.361Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/66198 Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves Els, P.S. (Pieter Schalk) u10047868@tuks.co.za Grobler, Jacob Frederick UCTD Vehicle Dynamics Hydro-Pneumatic Suspension Magneto-Rheological Valve Hydro-pneumatic suspension Magneto-rheological (MR) valves Suspension system Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Dissertation (MEng)--University of Pretoria, 2015. This study is focused on modifying an existing solenoid valve based semi-active hydropneumatic spring-damper system using Magneto-Rheological (MR) fluid. The MR fluid's effective viscosity can be altered by application of a magnetic field. Therefore, using a magnetic/ MR valve makes it possible to change the state of the system by simply changing the applied magnetic field. A prototype MR valve was developed to determine whether a unit small enough for installation was possible. This prototype valve was designed from first principles and properties such as pressure drop over the valve (damping) and flow blocking (for switching between spring characteristics) were measured. The measured pressure drop over the valve was higher than what was design for which was due to an incorrect assumption for the viscosity of the thixotropic MR Fluid. The flow blocking ability of the valve was determined by constant force tests. Results showed that the valve could virtually block the flow of fluid for approximately a quarter of the vehicles weight. With the second prototype, the valve design and magnetic circuit design were improved. Two valves were constructed and implemented on a prototype suspension system. The damping characteristics of the system were lower than expected, however they can be improved by changing the valve geometry. The base spring characteristics are acceptable, however the higher spring characteristics fail when a high force is exerted on the strut that exceeds the valves flow blocking capability. The response time of the valve is not yet sufficient to make the system viable for real world implementation, especially under extreme conditions that can change more rapidly than the current valves. mi2025 Mechanical and Aeronautical Engineering MEng Unrestricted SDG-09: Industry, innovation and infrastructure SDG-11: Sustainable cities and communities SDG-12: Responsible consumption and production 2018-08-17T09:42:37Z 2018-08-17T09:42:37Z 2005/03/18 2015 Dissertation Grobler, JF 2015, Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/66198> A2018 http://hdl.handle.net/2263/66198 en © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Vehicle Dynamics Hydro-Pneumatic Suspension Magneto-Rheological Valve Hydro-pneumatic suspension Magneto-rheological (MR) valves Suspension system Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title | Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title_full | Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title_fullStr | Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title_full_unstemmed | Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title_short | Multi-state hydro-pneumatic suspension system through the use of Magneto-Rheological (MR) valves |
| title_sort | multi state hydro pneumatic suspension system through the use of magneto rheological mr valves |
| topic | UCTD Vehicle Dynamics Hydro-Pneumatic Suspension Magneto-Rheological Valve Hydro-pneumatic suspension Magneto-rheological (MR) valves Suspension system Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production |
| url | http://hdl.handle.net/2263/66198 |