Citation Link: https://doi.org/10.1080/15397734.2024.2364906
Elastokinematic design and optimization of the multi-link torsion axle – a novel rear axle concept for BEVs
Publication Type
Article
Author(s)
Subjects
Axle
Torsion spring
Bushing
Automotive engineering
Torsion (gastropod)
Computer science
Skew
Deflection (physics)
Beam (structure)
Engineering
Mechanical engineering
Structural engineering
Physics
Date Issued
2024
Abstract
This work describes the elastokinematic design and optimization for a new, package space saving rear suspension especially intended for small battery electric vehicles. Mainly for reasons of cost and weight efficiency, the twist-beam axle is widely used, especially in the A and B segments. One of the main disadvantages of twist-beam axles is that they limit the rear package space because of the torsion profile. The basic idea of this work was to reverse the installation direction of the twist-beam axle to create an additional package space for the battery. To obtain an optimized elastokinematic design, a new algorithm was introduced that allows modeling of the elastokinematic behavior of the new mechanism. A Pareto optimization of the body connecting bushing was performed, revealing that a specific spatial orientation enables effective compensation for camber compliance deficits. Finally, the Pareto-optimized elastokinematic design was compared to compliance measurement results of a prototype vehicle equipped with the new suspension concept.
Owning collection