The major parts of automobile are as follows:
Engine is the main source of power. It is a self propelled device that can produce power by itself through conversion of chemical to heat to mechanical energy.
The power or drive train unit consist of parts that transmit the power from the engine until it finally reaches the wheels. The conventional type composed of clutch, transmission, universal joints, propeller shaft, differential and drive axle.
The running gear system consist of accessory units that assist the engine and the power train unit in enabling smooth operation running and control of the automotive vehicle. Running gear includes steering system, brake system, front and rear suspension system, wheels and tires, shock absorbers, linkages, leaf and coil spring, torsion bars and other accessory units.
The body is the compartment where the operator or driver and passenger or car goers are housed. The body includes the dashboards and instrument panel, seats, seat belts, lights, mirrors, wipers, air condition and other paraphernalia needed to provide comfort and safety to both driver and passenger.
The frame is referred to as skeleton of the automobile where the engine, power train unit, running gear system and body are attached together unitized into a complete automobile.
The chassis unit consist of all parts of the automobile like engine, power train unit, running gear system and frame minus automobile body.
