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An Alternative Variable Valve Timing System for Heavy Duty Vehicles
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2016 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve timing technology enables the possibility to increase efficiency, lowering emissions, increase engine torque, etc. One of the simplest ways to obtain a variable valve timing is to use cam phasers.

The dynamics of a hydraulic cam phaser has been studied, three concepts with the purpose to control such an element has been developed using simulation driven product development. Focus have been on robustness, simplicity and implementation. A final concept using on/off solenoids to control a torque driven cam phaser has been designed and simulated in GT-SUITE which validated its performance and functionality. A dynamic model was built in Simulink which simulated the behaviour of the cam phaser and provided tools for optimizing the rotor design.

By combining the knowledge of mechanical- and control engineering at Scania, the development process of such machine elements was effective. The outcome of this thesis has given a new perspective in understanding these components and their potentials.

Place, publisher, year, edition, pages
2016. , p. 67
Keywords [en]
Variable, Valve Timing, VVT, Cam phaser, Heavy Duty, Scania, Commercial Vehicles, GT-SUITE, Dynamic, On/off valve, Product Development, Machine Element
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-60153OAI: oai:DiVA.org:ltu-60153DiVA, id: diva2:1045854
External cooperation
Scania CV AB
Educational program
Mechanical Engineering, master's level
Supervisors
Examiners
Available from: 2016-12-05 Created: 2016-11-06 Last updated: 2016-12-05Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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