VehicleDynamicsFHRegensburg,UniversityofAppliedSciences
Inordertoachieveagoodmaneuverabilityamaximumsteerangleofapprox.30 mustbeprovidedatthefrontwheelsofpassengercars.Dependingonthewheelbasebussesandtrucksneedmaximumsteeranglesupto55 atthefrontwheels.
Recentlysomecompanieshavestartedinvestigationson’steerbywire’techniques.
1.3.2RackandPinionSteering
Rackandpinionisthemostcommonsteeringsystemonpassengercars,Fig.
1.4.Therackmaybelocatedeitherinfrontoforbehindtheaxle.TherotationsofthesteeringwheelδLare
Figure1.4:RackandPinionSteering
rstlytransformedbythesteeringboxtotheracktraveluZ=uZ(δL)andthenviathedraglinkstransmittedtothewheelrotationsδ1=δ1(uZ),δ2=δ2(uZ).Hencetheoverallsteeringratiodependsontheratioofthesteerboxandonthekinematicsofthesteerlinkage.
1.3.3LeverArmSteeringSystem
UsingaleverarmsteeringsystemFig.1.5,largesteeranglesatthewheelsarepossible.This
Figure1.5:LeverArmSteeringSystem
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