Chassis is a French term and was initially used to denote the chassis frame parts or basic structure of the vehicle. It is the backbone of the vehicle. A vehicle without a body is called Chassis. The components of the vehicle, like the power plant, transmission system, axles, wheels and tires, suspension, controlling systems like braking, steering, etc., and also electrical system parts are mounted on the Chassis frame. It is the main mounting for all the components, including the body. So it is also called a Carrying Unit.
The following main components of the Chassis are:
Frame: it is made up of long two members called “side members” riveted together with the help of a number of cross members.
Engine or Power plant: It provides the source of power
Clutch: It connects and disconnects the power from the engine flywheel to the transmission system.
FUNCTIONS OF THE CHASSIS FRAME:
1. To carry the load of the passengers or goods carried in the body.
2. To support the load of the body, engine, gearbox etc.,
3. To withstand the forces caused due to the sudden braking or acceleration.
4. To withstand the stresses caused due to the bad road conditions.
5. To withstand centrifugal force while cornering