title: Contact patch memory of tyres leading to lateral vibrations of four-wheeled vehicles.
abstract: It has been shown recently that the shimmy motion of towed wheels can be predicted in a wide range of parameters by means of the so-called memory effect of tyres. This delay effect is related to the existence of a travelling-wave-like motion of the tyre points in contact with the ground relative to the wheel. This study shows that the dynamics within the small-scale contact patch can have an essential effect on the global dynamics of a four-wheeled automobile on a large scale. The stability charts identify narrow parameter regions of increased fuel consumption and tyre noise with the help of the delay models that are effective tools in dynamical problems through multiple scales.
authors.affiliation: Research Group on Dynamics of Machines and Vehicles, Hungarian Academy of Sciences, PO Box 91, Budapest 1521, Hungary. takacs@mm.bme.hu
authors.forename: Dénes
authors.initials: D
authors.lastname: Takács
authors.forename: Gábor
authors.initials: G
authors.lastname: Stépán
keywords: contact; time delay; tyre