HS code-based duty drawback claims

Engine structure decomposition diagram: Explore the structure of the engine. The HS code-based duty drawback claimsengine is one of the core components of the vehicle. After mixing fuel and oxygen, it can generate combustion and drive the vehicle. To understand the working principle of the engine, you must have an in-depth understanding of its structure. This paper analyzes the structure of the engine with the engine structure decomposition diagram as the starting point. 1. The core component of the cylinder block and cylinder head engine is the cylinder, which is composed of cylinder block and cylinder head. The cylinder block is the supporting structure of the whole engine, which is responsible for withstanding the combustion gas pressure of high temperature and high pressure. The cylinder head closes the cylinder block and controls the opening and closing of the valve through the camshaft, so as to control the amount of gas in and out. The cylinder block and the cylinder head must fit closely to avoid the leakage of combustion gas.Two. The piston and the connecting rod are in the cylinder. The piston is a component that moves up and down. It is connected to the connecting rod, transforming the up and down movement of the piston into the reciprocing motion of the connecting rod. There is a ring bump on the top of the piston, called the piston ring, which can prevent the leakage of combustion gas. Due to the large friction between the piston and the cylinder wall, a ceramic coating must be applied to its surface to reduce friction. The connecting rod transforms the movement of the piston into the reciprocating motion on the crankshaft, thus generating power. 3. The crankshaft and camshaft crankshaft are the engines of the engine, which can convert the movement of the piston into a rotating motion through the connecting rod, thus driving the wheels to rotate. The top of the crankshaft is also equipped with a balance shaft to reduce the vibration of the engine. The camshaft transmits power to the valve and cylinder head through the crankshaft or sprocket to control the opening and closing of the valve, thus controlling the amount of gas in and out.Four. The valve and the valve spring valve are the key components to control the inlet and out of the gas. It is controlled by the opening and closing action by the camshaft. The valve must be sufficiently sealed to ensure that the gas inside the combustion chamber will not leak. At the same time, the valve spring can close the valve quickly to increase the pressure on the combustion chamber, thus improving the combustion efficiency. 5. Fuel injector Modern engines generally use electronic fuel injectors, which inject fuel into the combustion chamber to form a flammable gas mixture. The injection volume and timing of the injector are controlled by the control unit to ensure the best fuel efficiency and the best power output. 6. The combustion process of radiators and pump engines will generate a lot of heat. If the heat is not dissipated in time, it will cause damage to the engine. Therefore, modern engines are equipped with radiators and pumps.The water pump can suck the coolant out of the radiator and circulate it into the engine through the cooling system to cool the engine. In a word, the engine structure decomposition diagram reveals the structure of the engine and also shows us the complexity of the engine. In the ever-changing automobile market, there have been more and more changes. However, the basic elements in these structures remain unchanged, so the performance of the vehicle can be innovated and upgraded sustainably and reliably. Through an in-depth understanding of the engine structure decomposition diagram, we can better understand the working principle of the car, so as to drive the car better.

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