Change search
ReferencesLink to record
Permanent link

Direct link
Adaption and evaluation of transversal leaf spring suspension design for a lightweight vehicle using Adams/Car
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This investigation deals with the suspension of a lightweight medium-class vehicle for four passengers with a curb weight of 1000 kg. The suspension layout consists of a transversal leaf spring and is supported by an active air spring which is included in the damper. The lower control arms are replaced by the leaf spring ends. Active ride height control is introduced to compensate for different vehicle load states. Active steering is applied using electric linear actuators with steer-by wire design. Besides intense use of light material the inquiry should investigate whether elimination of suspension parts or a lighter component is concordant with the stability demands of the vehicle. The investigation is based on simulations obtained with MSC Software ADAMS/Car and Matlab. The suspension is modeled in Adams/Car and has to proof it's compliance in normal driving conditions and under extreme forces. Evaluation criteria are suspension kinematics and compliance such as camber, caster and toe change during wheel travel in different load states. Also the leaf spring deflection, anti-dive and anti-squat measures and brake force distribution are investigated. Based on a simplified version of the leaf spring suspension design a full vehicle model is created. The comparison between the suspension models evaluates the same basic suspension parameters to ensure the compliance. Additionally roll rate and understeer gradient are investigated. It can be shown that the vehicle equipped with transversal leaf spring instead of lower control arms fulfils the set kinematics and compliance requirements. Road holding performance is assured for normal driving conditions on public roads.

Place, publisher, year, edition, pages
2015. , 82 p.
TRITA-AVE, ISSN 1651-7660 ; 2015:09
Keyword [en]
Transversal leaf spring, composite leaf spring, wheel guiding leaf spring
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-180035OAI: diva2:891485
Subject / course
Vehicle Engineering
Available from: 2016-01-07 Created: 2016-01-07 Last updated: 2016-01-07Bibliographically approved

Open Access in DiVA

fulltext(3930 kB)191 downloads
File information
File name FULLTEXT01.pdfFile size 3930 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Vehicle Dynamics
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 191 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 235 hits
ReferencesLink to record
Permanent link

Direct link