What are the four main parts of a car?

The composition of automobile is divided into four parts: automobile engine, automobile chassis, automobile body and automobile electrical system. Engine: The engine is the source of power and the "heart" of the car. The engine burns fuel to generate power, and then drives the car through the chassis transmission system. It is mainly composed of crank-connecting rod mechanism, gas distribution structure and "five series" cooling system, lubricating system, starting system, ignition system and oil supply system. It should be noted that there is also a diesel engine without an ignition system. Chassis: Power alone is not enough. It needs a structure to produce movement. It is the chassis that supports the whole vehicle and receives the power of the engine. All parts of the car are assembled on the basis of the chassis, mainly composed of braking system, driving system, steering system and transmission system. Automobile body: the automobile body structure located above the chassis and used for riding, loading and protecting safety. Power alone is not enough. It needs someone to operate, and it has a protective effect. It is assembled by various parts. Automobile body is generally divided into driving part and loading part, which is mainly composed of hood, door, trunk cover, top cover, support column, fender and so on. With the development of technology, more and more manufacturers work hard on the car body, and various aerodynamics are applied. Automotive electrical system: this system is divided into two categories, power generation and electrical equipment. Power generation consists of generators and batteries, but there are many kinds of electrical equipment, including lighting devices, display devices, ignition systems, regulators, stereos and so on.