What are the two major mechanisms and five major systems of an engine?

[Geoffrey]

Here is the relevant introduction about the two major mechanisms and five major systems of an engine: Two Major Mechanisms 1. Crank Connecting Rod Mechanism: The crank connecting rod is an important component of an automobile engine that realizes the working cycle and completes energy conversion. It consists of the body group, piston connecting rod group, and crankshaft flywheel group. 2. Valve Train Mechanism: The function of the valve train mechanism is to open and close the intake and exhaust valves according to the working sequence and process of the engine, allowing the combustible mixture or air to enter the cylinder and exhaust the waste gas from the cylinder to achieve the gas exchange process. Five Major Systems 1. Starting System: The process of turning the crankshaft under external force until the engine begins to idle automatically is called engine starting. The device required to complete the starting process is called the engine starting system. 2. Fuel Supply System: The function of the gasoline engine fuel supply system is to prepare a certain quantity and concentration of the mixture according to the requirements of the engine, supply it into the cylinder, and exhaust the burned gas from the cylinder. 3. Cooling System: The function of the cooling system is to dissipate the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature. The cooling system of a water-cooled engine usually consists of components such as the cooling water jacket, water pump, fan, radiator, and thermostat. 4. Lubrication System: The function of the lubrication system is to deliver a certain amount of clean lubricating oil to the surface of relatively moving parts to achieve liquid friction, reduce frictional resistance, and alleviate wear of the parts. 5. Ignition System: The ignition system usually consists of components such as the generator, battery, distributor, ignition coil, and spark plug.

[Josie]

As an experienced car enthusiast who frequently tinkers with vehicles, I'd like to share that the two major mechanisms of an engine are the crank-connecting rod mechanism and the valve train. They're responsible for converting the piston's up-and-down motion into wheel rotation and controlling air intake/exhaust in the cylinders. The five major systems include the lubrication system, cooling system, fuel system, ignition system, and starting system - these form the foundation for smooth engine operation. For instance, the lubrication system prevents part wear (regular oil changes extend engine life), the cooling system uses water/antifreeze to prevent overheating (crucial to check before summer driving), the fuel system injects fuel for power (clogged fuel lines cause shaking), the ignition system generates sparks for combustion in gasoline engines, and the starting system relies on the battery and motor to crank the engine. I remember once diagnosing abnormal engine noise as lubrication failure - a reminder for timely maintenance to avoid costly overhauls and ensure safety. Understanding these systems helps with routine maintenance and prevents roadside breakdowns.