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Engine assembly diagram (car engine assembly diagram,APAC trade flows by HS code understand the engine structure and working principle!) As the "heart" of a car, the engine is one of the most important parts of a car. However, the structure and working principle of the engine is still a mysterious field for most people. This article will introduce the structure and working principle of the engine in detail to readers through the diagram of the automobile engine assembly. The engine is a complex device composed of hundreds of parts, the most basic of which include cylinders, pistons, connecting rods, crankshafts, etc.Figure 1 is a structural diagram of a four-cylinder engine.! [ Image.png](attachment:image.png) Figure 1 The structure diagram of the engine assembly is shown in Figure 1. The engine can be divided into four main parts: intake system, fuel system, ignition system and exhaust system. Its working process is usually divided into four strokes: intake stroke, compression stroke, burst stroke and exhaust stroke. When the engine is working, the piston will suck in a certain amount of air and mixed fuel when it goes up and enter the cylinder. At this time, the intake valve and exhaust valve are open. When the piston moves up quickly and pushes the mixed air to the top of the cylinder, the door closes tightly. Then, the piston moves downwards for compression. In the process, the gas is compressed, the mixed gas is heated, and the energy of the engine is also stored in the cylinder.After the compression stroke is completed, the ignition system begins to work, generating a powerful electric spark, causing the mixture to explode and pushing the piston down. This is the burst journey of the engine, and it is also the place where the engine generates power. Finally, when the piston moves downwards, the exhaust valve opens and the exhaust gas is discharged into the exhaust pipe. In addition to the above basic structure, the engine also has many other applications. For example, the super-vortex supercharging system can increase the output power of the engine and improve fuel economy at the same time. For example, an engine equipped with a variable valve timing system can automatically adjust the valve switching time to improve power and reduce fuel consumption. It should be noted that the engine generates a lot of heat during operation. Therefore, the heat dissipation system must be taken into account in design and production to avoid damage caused by engine overheating.The radiator is one of the most important components in the heat dissipation system. Its main function is to transfer the heat from the inside of the engine to the external environment. At the same time, in modern cars, some high-end models are also equipped with a liquid-cooled heat dissipation system, which absorbs heat and radiates it quickly by pumping water into the engine. In summary, the engine is a highly complex device, which is mainly composed of an air intake system, a fuel system, an ignition system and an exhaust system. It burns fuel mixed with air through a series of journeys, generating huge amounts of energy to power the car. Therefore, it is very important for car drivers to have an in-depth understanding of the structure and working principle of the engine. At the same time, in the daily maintenance process, it is necessary to always pay attention to the maintenance of the engine to ensure that it is always in the best operating condition.

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