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Design and Packaging of All-in-One Axle
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Väg- och spårfordon samt konceptuell fordonsdesign.
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics, Väg- och spårfordon samt konceptuell fordonsdesign.
2023 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Design och förpackning av allt-i-ett axeln (Swedish)
Abstract [en]

The aim of this thesis work is to design an electric axle that contains all the operational components, like the powertrain, suspension, brakes, and steering system. One of the requirements of this design work is to package all the axle components compactly in one single unit. This work is also carried out to assess the viability of assisting in the overall modularity of the chassis as modularity in commercial vehicles has become a popular trend in recent years due to the increasing market competition as well as the need for more sustainable products. The work has been carried out in three phases - research, conceptualization, and analysis. The research phase consisted of both market research on the existing products available commercially and a literature review of the various components of an axle to find feasible alternatives to the components currently being used in electric axles. In the conceptualization phase, the various e-axle concepts were compared using methods like PUGH’s matrix to eliminate concepts that did not seem feasible for the detailed design. Preliminary CAD models were designed for the One-motor solution and the In-wheel motor solution. The In-wheel motor solution was eliminated due to some critical limitations and the One-motor solution was chosen for the next sub-phase of detailed CAD modeling. This concept was then analysed using Finite Element analysis as well as kinematic analysis to get insights into the axle performance as well as to observe the load distribution on the axle during operation.

Abstract [sv]

Målet med detta examensarbete är att designa en elektrisk axel som innehåller alla driftskomponenter, såsom kraftöverföring, fjädring, bromsar och styrning. Ett av kraven för denna design är att kompakt packa alla axelkomponenter i en enda enhet. Arbetet utförs också för att bedöma genomförbarheten av att bidra till den övergripande modulariteten hos chassit, eftersom modularitet inom kommersiella fordon har blivit en populär trend de senaste åren på grund av ökad marknadskonkurrens samt behovet av mer hållbara produkter. Arbetet har genomförts i tre faser - forskning, konceptualisering och analys. Forskningsfasen bestod av både marknadsundersökningar av befintliga produkter som finns kommersiellt tillgängliga och en litteraturgenomgång av olika delkomponenter i en axel för att hitta genomförbara alternativ till de komponenter som för närvarande används i elektriska axlar. I konceptualiseringsfasen jämfördes olika e-axelkoncept med hjälp av metoder som PUGH-matrisen för att eliminera koncept som inte verkade genomförbara för den detaljerade designen. Preliminära CAD-modeller designades för enmotorslösningen och in-wheel- motorlösningen. In-wheel-motorlösningen eliminerades på grund av vissa begränsningar, och enmotorslösningen valdes för nästa underfas av detaljerad CAD-modellering. Detta koncept analyserades sedan med hjälp av elementanalys samt kinematisk analys för att få insikter i axelns prestanda och observera belastningsfördelningen på axeln under drift.

Place, publisher, year, edition, pages
2023.
Series
TRITA-SCI-GRU ; 2023:284
Keywords [en]
E-axle, Modularity, PUGH’s Matrix, CAD-Modeling, Kinematic Analysis, Finite Element Analysis
Keywords [sv]
E-axel, Modularitet, PUGHs matris, CAD-modellering, Kinematisk Analys, Finita Element Analys
National Category
Vehicle and Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-340508OAI: oai:DiVA.org:kth-340508DiVA, id: diva2:1817476
External cooperation
Case Company
Subject / course
Vehicle Engineering
Educational program
Master of Science - Vehicle Engineering
Supervisors
Examiners
Available from: 2023-12-06 Created: 2023-12-06 Last updated: 2025-02-14Bibliographically approved

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Väg- och spårfordon samt konceptuell fordonsdesign
Vehicle and Aerospace Engineering

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