Change search
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
A tyre model for energy studies in vehicle dynamics simulations
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0001-6339-1043
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. , xii, 64 p.
Series
TRITA-AVE, ISSN 1651-7660 ; 2015:15
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-166282ISBN: 978-91-7595-598-8 (print)OAI: oai:DiVA.org:kth-166282DiVA: diva2:810300
Presentation
2015-05-22, Farkostteknik laboratoriet, Teknikringen 8, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20150507

Available from: 2015-05-07 Created: 2015-05-07 Last updated: 2015-05-07Bibliographically approved
List of papers
1. Investigating the Potential of Wheel Corner Modules in Reducing Rolling Resistance of Tyres
Open this publication in new window or tab >>Investigating the Potential of Wheel Corner Modules in Reducing Rolling Resistance of Tyres
2014 (English)In: Proceedings of FISITA "14 World Automotive Congress, Maastricht, Netherlands (2014), 2014Conference paper, Published paper (Refereed)
Abstract [en]

The improvement in tire rolling efficiency is one of the key elements to optimize the fuel economy and thereby reduce the vehicle emissions. Earlier efforts to reduce the rolling resistance have mainly been focusing on new materials in the tire compounds. The overall research aim of this study is to present the potentials ofimplementing innovative chassis concepts with the focus on Wheel Corner Modules (WCM) by describing thepossibilities in affecting rolling resistance and relating them to previous research findings. The core idea of theconcept is to actively control and actuate all degrees of freedom in the wheel i.e. implementing steering,suspension and propulsion functions into a unique module which can be implemented in each corner of the vehicle. Using this concept the limitations of traditional wheel kinematics can be resolved extensively. This article presents the first step towards creating a vehicle simulation model that can show how the WCM functionality can influence the rolling resistance. A model of loss is chosen after analysing the behaviour of three different rubber models and then implemented into a brush tire model. An effective way, but less complicatedcompared to current methods, to introduce the loss into tire model is presented. In conventional suspensions, thedesign is compromising between for example safety, comfort and rolling resistance, etc. at all drivingconditions. However, using the WCM, the possibility of achieving a better compromise between those objectivesis possible. Finally, based on WCM functionalities a plausible control architecture is proposed.

National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-166208 (URN)
Conference
FISITA ’14 World Automotive Congress, Maastricht, Netherlands, 2–6 June 2014
Note

QC 20150507

Available from: 2015-05-05 Created: 2015-05-05 Last updated: 2017-05-29Bibliographically approved
2. Exploring active camber to enhance vehicle performance and safety
Open this publication in new window or tab >>Exploring active camber to enhance vehicle performance and safety
Show others...
2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The aim of this study is to evaluate optimal active camber strategies for improvement of vehicle performance and safety during limit handling. Numerical optimisation is used to find solutions on how the active camber should be controlled and coordinated in cooperation with individual braking and front axle steering. Based on the characteristics of a multi-line brush tyre model, a Simple Magic Formula description is developed where camber dependency, load sensitivity and first order speed dependent relaxation dynamics are included. The vehicle is analysed during an evasive manoeuvre when the vehicle is running at the limit. It is evident from the results that active camber control can improve safety and performance during an avoidance manoeuvre.

National Category
Vehicle Engineering
Research subject
SRA - Transport
Identifiers
urn:nbn:se:kth:diva-138555 (URN)
Conference
23rd International Symposium on Dynamics of Vehicles on Roads and Tracks, 19th-23rd of August 2013, Qingdao, China
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20140204

Available from: 2013-12-19 Created: 2013-12-19 Last updated: 2015-05-07Bibliographically approved
3. A Multi-Line Brush Based Tyre Model to Study the Rolling Resistance and Energy Loss
Open this publication in new window or tab >>A Multi-Line Brush Based Tyre Model to Study the Rolling Resistance and Energy Loss
2015 (English)In: Proceedings of 4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK (2015), 2015Conference paper, Published paper (Refereed)
Abstract [en]

This study aim to develop a three dimensional multi-line brush based tyre model for investigating the rolling resistance and energy loss in tyres. The losses in the model are characterised by the external losses originated from the sliding phenomenon in the tyre contact patch, and the internal losses due to the tyre viscoelastic nature which is employed by a rubber model. The Extended Brush tyre Model (EBM) proposed in this work can be used to estimate the dissipated energy and the rolling resistance under different driving manoeuvres and wheel conditions. This paper focuses on the estimation of energy loss and in-plane rolling resistance.

National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-166211 (URN)000375226400020 ()978-1-84469-032-9 (ISBN)
Conference
4th International Tyre Colloquium: Tyre Models for Vehicle Dynamics Analysis, Guildford, UK
Note

QC 20150507

Available from: 2015-05-05 Created: 2015-05-05 Last updated: 2017-05-29Bibliographically approved
4. Extended Brush Tyre Model to Study Rolling Loss in Vehicle Dynamics Simulations
Open this publication in new window or tab >>Extended Brush Tyre Model to Study Rolling Loss in Vehicle Dynamics Simulations
2017 (English)In: International Journal of Vehicle Design, ISSN 0143-3369, E-ISSN 1741-5314, Vol. 73, no 4, 255-280 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes a semi-physical tyre model that enables studies of rolling loss in combination with vehicle dynamic simulations. The proposed model, named extended brush tyre model (EBM), takes the effects of driving conditions, wheel alignment, and tyre materials into account. Compared to the basic brush tyre model, EBM includes multiple numbers of lines and bristles as well as integrated rubber elements into the bristles. The force and moment characteristics of the model are shown to have a good correlation with the Magic Formula tyre model and experimental data. The numerically estimated rolling resistance coefficients under different conditions are compared to findings in the literature, FE-simulations and experiments. The model can capture some aspects that are not covered by the available literature and experimental observations such as camber effect on rolling loss. EBM can be used as a platform for future studies of rolling loss optimisation using active chassis control.

Place, publisher, year, edition, pages
InderScience Publishers, 2017
Keyword
EBM; extended brush tyre model; rolling loss; rolling resistance; tyre
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-166280 (URN)10.1504/IJVD.2017.10004140 (DOI)000398047100003 ()2-s2.0-85017022330 (Scopus ID)
Note

QC 20170419

Available from: 2015-05-07 Created: 2015-05-07 Last updated: 2017-05-29Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Davari, Mohammad Mehdi

Search in DiVA

By author/editor
Davari, Mohammad Mehdi
By organisation
Vehicle DynamicsVinnExcellence Center for ECO2 Vehicle design
Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 739 hits
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