Stability improvement of an ATV by modifying Suspension Parameters

Suspension design of an ATV is presented. At present, the vehicle is equipped with Parallel Short Long Arm at front and 3 Link Trailing Arm at the rear. As present vehicle’s stability is low, modifications are made to the design. The stability of an ATV majorly depends on the Suspension system. By modifying the rear suspension design and also by reducing the un-sprung mass, stability is greatly improved. The modifications are done by considering other dynamic parameters. The main objective was to make the vehicle controllably oversteer. Rear H-Arm with single camber link is selected as it has minimal members and the geometry reduces the rear roll center position which greatly improves stability. Keywords–Baja suspension system, H-Arm, independent suspension, parallel short long arm.