What are the Five Major Systems of a Car?

[VanVivian]

The five major systems of a car are the fuel supply system, lubrication system, cooling system, ignition system, and starting system. The fuel supply system prepares a certain quantity and concentration of air-fuel mixture according to the engine's requirements, supplies it to the cylinders, and exhausts the burned gases from the cylinders into the atmosphere. The lubrication system delivers a certain amount of clean lubricating oil to the surfaces of relatively moving parts to achieve liquid friction, reduce frictional resistance, minimize wear on components, and clean and cool the surfaces of the parts. The cooling system dissipates part of the heat absorbed by the heated components in a timely manner. The ignition system ignites the combustible mixture in the cylinders through electric sparks. In gasoline engines, a spark plug is installed on the cylinder head, with its tip extending into the combustion chamber, capable of generating electric sparks between the electrodes at the right time. The starting system refers to the entire process from when the crankshaft begins to rotate under external force until the engine starts to idle automatically. The devices required to complete this starting process are called the engine's starting system.