The car consists of four parts: the engine, the chassis, the body and the electric appliance.

First, the engine: crank linkage mechanism, gas distribution mechanism, fuel supply system, ignition system, lubrication system, cooling system and starting system.

Second, the chassis: drive train, driving system, steering system and brake system.

The drive train transmits engine power to the drive wheels and is composed of a clutch, a transmission, a universal transmission, and a final drive.

The driving system consists of a frame, a steering axle, a drive axle, a suspension, and wheels.

The steering system consists of a steering gear and a steering mechanism.

The brake system is generally composed of two separate units, the service brake system and the parking brake system.

Third, the body: used to install drivers, passengers and goods.

4. Electrical appliances: It consists of power supply, ignition system, starting system, automobile lighting system, signal system and instrument.