Effect of Part Flexibility and Bushing Stiffness on Compliance Characteristics of an In-wheel-motor Drive Electric Vehicle Suspension

摘要

In this paper, the compliance characteristics of an in-wheel-motor-drive (IWMD) electric vehicle (EV) suspension are investigated using multi-body dynamics method. The influences of each part's flexibility, including that of knuckle, upper control arm (UCA) and lower control arm (LCA), are studied and compared. Sensitivity analysis is also carried out to identify which bushing plays a major role in affecting the suspension compliance and its effect is analyzed. Comparison between the effect of suspension parts' flexibility and that of bushing stiffness is also made. The results can provide valuable advices for modeling and design of the IWMD EV suspension compliance characteristics.