Design of Double Wishbone Suspension System of BAJA Vehicle

Abstract

— Independent motion of wheels, capable of navigating on uneven and bumpy road is important characteristic
of suspension system for BAJA vehicle. The system connects the wheels with chassis by means of an assembly, which
provides stiffness necessary to withstand shocks from roads. Suspension system dictates resistance to roll moment,
understeer or oversteer characteristics and many other factors. In this way, it is directly responsible for handling of
vehicle and safety. The suspension design must be quite stiff in order to bear sudden shocks due to potholes, steep drops,
etc. The suspension characteristics of vehicle aide in manueverablity and drive comfort. Therefore, correct design of
system is not only a matter of driver safety, but also a key factor in result of racing. The paper discusses various types of
suspension systems suitable for BAJA vehicle, the design methodology and results achieved by simulation. It is
paramount to select proper combination of spring and linkages to achieve optimum performance, with less weight. The
design of suspension system is iteration-based and requires correct compromise between comfort and performance, to
provide driver fatigue-less drive.