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Höghöjdsanpassning av BvS10: Konceptstudie för optimering av överladdningssystem
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2014 (Swedish)Independent thesis Basic level (professional degree), 180 HE creditsStudent thesisAlternative title
High Altitude adjustment of BvS10 : Concept study for optimization of overcharging system (English)
Abstract [en]

This report relate a concept study that consider a number of different proposals to improve the overcharging system in BAE Systems Hägglunds tracked vehicle series BvS10, to maintain sealevel power at extreme altitude.

At high altitude the power losses beacuase of the air density that decreases, which results in less fuel can be burned. The decreasing of air density also gives rise to fatigue failure of the turbocharger unless power is reduced.

The proposals shall be as required by BAE Systems Hägglunds economically sustainable and defensible from a packing perspective. That means the selected solution must have a reasonable price tag and at the same time a minimal impact on adjacent components.

The basis for this thesis is based on benchmarking of both the auto industry as the flight industry, to find inspiration and tips for improvement.

Some of the concepts have after gathering facts and calculations been excluded while other solutions has been considered as workable and thus interesting for BAE Systems Hägglunds.

Initially the current turbochargingsystem was analyzed in order to determine the starting point and thus be able to fix the current problems surrounding high altitude driving. Since then, various concepts has been studied in form of single turbocharger, twostage turbocharging, turbocharger-supercharger compound, material exchange of impeller and engine optimization.

The solution that is concidered to works especially well for BAE Systems Hägglunds tracked vehicle series, is to complement the current turbocharging setup with a centrifugal supercharger. 

Place, publisher, year, edition, pages
2014. , 49 p.
, MA, 1418
National Category
Mechanical Engineering
URN: urn:nbn:se:umu:diva-89838OAI: diva2:724541
External cooperation
BAE Systems Hägglunds AB
Subject / course
Educational program
Bachelor of Science Engineering in Mechanical Engineering
Available from: 2014-06-13 Created: 2014-06-12 Last updated: 2014-06-13Bibliographically approved

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