This paper present design of the suspension mechanism intended to use in a terrain vehicle with four wheels steer and four wheels drives. The main aims are concentrated to design an independent suspension system to provide better contact of tire with road surface and less lateral displacement of the tire. Following are derived some important conclusions, such as:
Designed suspension system provides 45% less displacement of the wheel in lateral motion. When wheel is pushed upward situation is better and provides 72.6% less displacement compared with same double wishbone suspension system,
Designed suspension system provides relatively small values of camber angel nearly to zero which influence to have better contact of the tire with road surface. This improve, is a result that suspension mechanism allow wheel respectively tyre to acts perpendicular in road surface. The large vertical motion of the wheels (– 250 ... 250 mm) will be caused a lot of problems in steering mechanism.
The large vertical motion should be not influence on the contra torque on the steering wheel, but have ability to rotate the wheel around the kingpin axes for minor angle thus causing the vehicle to decrease stability. To avoid this problem completely new design of steering
mechanism should be done. Achieved results that are presented here in general will help the designer of vehicles to equip his vehicle with such suspension system, especially terrain vehicles