What are the Two Major Structures and Five Major Systems of an Engine?

[McGrant]

Engine two major structures and five major systems are: the crank-connecting rod mechanism and the valve train, as well as the fuel supply system, lubrication system, cooling system, ignition system, and starting system. Diesel engines consist of two major mechanisms and four major systems: the crank-connecting rod mechanism, the valve train, as well as the fuel supply system, lubrication system, cooling system, and starting system. Diesel engines are compression-ignited and do not require an ignition system. Reasons for the engine fault indicator light to illuminate: 1. Poor gasoline quality can lead to incomplete combustion of the air-fuel mixture in the cylinder; 2. Carbon deposits in the intake tract and on the pistons can cause poor atomization, leading to incomplete combustion; 3. Spark plugs that have not been replaced for a long time may weaken in performance; 4. Faulty car sensors, among other reasons.

[CoraLee]

I've been repairing cars for over a decade and have seen all kinds of engine issues. The so-called two major structures are the crankshaft connecting rod mechanism and the valve train. The crankshaft connecting rod converts the piston's up-and-down motion into crankshaft rotation, while the valve train controls the opening and closing of the valves. The five major systems specifically refer to: the starting system that gets the engine turning, the ignition system that generates sparks to ignite the air-fuel mixture in the cylinders, the fuel system that supplies gasoline, the lubrication system that uses engine oil to protect internal components, and the cooling system that regulates temperature to prevent overheating. Just last week, I worked on a case where the owner reported difficulty starting the engine. Upon inspection, we found that a clogged lubrication system caused overheating, which damaged the cylinder block. These systems work in coordination and are all indispensable. During routine maintenance, special attention should be paid to the condition of the engine oil and coolant.

[KeiraLynn]

As a car enthusiast, I particularly enjoy studying the internal structure of engines. Simply put, an engine has two major mechanisms: the crankshaft and connecting rod mechanism converts piston motion into rotational power, while the valve train precisely controls the timing of intake and exhaust. There are also five major systems: the starting system acts like the engine's key, the ignition system is essential in gasoline engines, the fuel system delivers fuel, the lubrication system protects metal components and reduces wear, and the cooling system maintains optimal operating temperatures. I remember once when I modified a racing engine and found that an inadequate cooling system caused knocking. These systems work in coordination through sensors and computers, and modern cars have added new technologies like turbocharging. Regularly replacing spark plugs and air filters is crucial.

[StViolet]

After driving for so many years, understanding the engine structure is quite practical. There are two main mechanisms: the crank-connecting rod is responsible for power conversion, and the valve train controls the intake and exhaust of gases. The five major systems include the starter for starting, the spark plug coil for ignition, the fuel pump and injector for fuel supply, the water pump and radiator for cooling, and the oil circulation system to prevent part wear. Diesel vehicles don't have an ignition system. Once during a long trip, I noticed the water temperature rising abnormally and promptly stopped to check, discovering a coolant leak, which helped avoid a major overhaul. This knowledge can help identify engine fault symptoms. It's recommended to check all fluids and filters every 5,000 kilometers.