Suspension system in automobiles

Presented by-Indranil Biswas

3rd year Automobile EngineeringMalda Polytechnic, Malda

WHAT IS SUSPENSION SYSTEM Suspension is the term given to the system of

springs, shock absorbers and linkages that connects a vehicle to its wheels.

Protects the vehicle itself and passengers & cargo from damage and wear. Ensures riding comfort.

Serves a dual purpose – contributing to the car's handling and braking.

FUNCTION To prevent the road shocks from being

transmitted to the vehicle frame. To preserve the stability of the vehicle in

pitching or rolling. To safeguard the occupants from road

shocks. To provide good road holding while driving,

cornering and braking.

ELEMENTS OF SUSPENSION SYSTEM Spring It absorbs road shocks or impacts

due to bumps & potholes in road by oscillating. Tyres also provide spring effect , but to a smaller extent.

Damper It reduces the tendency of the carriage unit to continue to bounce up and down on its springs. Oscillation due to road shocks are restricted to a reasonable level by damper.

TYPES OF SPRINGS Leaf spring Coil spring Torsion bars Air and gas spring

LEAF SPRING A leaf spring is a simple type of suspension

spring commonly used in heavy duty vehicles. The advantages of leaf spring over helical

spring is that the ends of the spring be guided along a definite path as it deflects to act as a structural member in addition to energy absorbing device.

COIL SPRING Length of spring-steel rod wound into a

spiral. Most common type of springs used on both

front and rear suspension. Coils cushion and absorb the shocks and

bumps.

TORSION BARS It resists twisting action and acts like a

conventional spring. One end is attached to the frame and the

other to the lower control arm. Up and down of the suspension system

twists the torsion bar. Then it will try to return to its original

shape, moving the control arm to its original place.

TORSION BARS

AIR AND GAS SPRINGS Rubber cylinder filled with air. Air pressure in the rubber cylinder gives

the unit of spring action. Special rubber compounds are used so the

air spring can operate properly in cold weather.

TYPES OF SUSPENSION SYSTEMS Conventional suspension system Independent suspension system Air suspension system Hydrolastic suspension system

TYPES OF SUSPENSION SYSTEMS Conventional Suspension System:-

It has both right and left wheel attached to the same solid axle. When one wheel heats a bump in the road, its upward movement causes a slight tilt of the other wheel.

Independent Suspension System:- It allows one wheel to move up and down

with minimal effect to the other.

TYPES OF SUSPENSION SYSTEMS Air Suspension System:-

It used in place of conventional steel springs in passenger cars, and heavy vehicle applications such as buses and trucks.

Hydrolastic Suspension System:- The system replaces the separate springs and

dampers of a conventional suspension system which are interconnected between the front and rear wheels on each side of the vehicle.

CONCLUSION From the whole discussion in suspension system,

it is observed that suspension system provides the energy to a vehicle to protect itself from damaging, increasing life of the vehicle, handing and comfort of passengers and many more. 

So, if the suspension system is removed, then ride in an Audi or Mercedes will feel like a bull-cart ride. But the only difference is speed. So, the scope of suspension system is too bright.

THANK YOU

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