Springs Used in Automobile

 The spring in suspension system are used to absorb the up and down motion of the wheels, when the wheels pass through pot holes and bumps on the road. This protects the passengers from getting shocks or jerks. The springs are placed between the chassis frame and axles. The following types of springs are generally used in automobiles are as follows:

1. Leaf Springs
2. Coil Springs
3. Torsion Bar

>>Leaf  Spring:

The leaf springs used in automobiles are made up of several flat long strips made from spring steel of rectangular cross section. Each of the strips are known as Leaf. The several strips are placed one on the others and are held together by means of a center bolt and clamps. The springs assembly consists of a main leaf which extends to the full length of the spring. The ends of the main leaf are formed with loops known as eyes. The other leaves in the spring are attached to the main leaf by means of center bolt and clamps as in the figure.

>>Coil Spring:

The springs are extensively used in suspension system of automobiles. A standard coil spring is made from a length of special spring steel, usually round in section. It is wound in the shape of a coil as shown in the figure. The ends of the coil spring are kept flat so that they seat properly.

>>Torsion Bar:

The torsion bar is made from spring steel bar which functions by twisting. One end of the torsion bar is fixed to the frame, so that it may  not run. The other end is attached to the lower control arms as shown in figure. When the vehicle goes over a bump or pot hole, the torsion rod gets the twisting effect and the elasticity of the rod is utilized to bring back the wheel to it's normal position in the same manner as a spring arrangement.