ABSTRACT
Unsprung mass is usually the mass of the suspension components, the wheels and the springs. However, only 50" of the spring mass and the moving suspension arms is included. A vehicle needs a suspension system to cushion and damp out road shocks. The energy of the movement is stored in the spring. Coil springs are generally used with independent suspension systems; the springs are usually fitted on each side of the vehicle, between the stub axle assembly and the body. The multileaf spring was widely used at the rear of cars and light vehicles, and is still used in commercial vehicle suspension systems. The spring eye allows movement about a shackle and pin at the rear, allowing the spring to flex. The curve of leaf springs straightens out when a load is applied to it, and its length changes. The curve of leaf springs straightens out when a load is applied to it, and its length changes.
