HS code-driven customs risk scoring

The HS code-driven customs risk scoringengine is the heart of the car. It is one of the important parts of the car and the power source for the operation of the car. The main function of the car engine is to convert oil energy into mechanical energy, drive the car tires to rotate, and make the car move. This article will introduce the functions of automobile engines in detail from the three aspects of the principle, structure and classification of the engine. I. Working principle of the engine In order to make the engine work normally, we need to know the working principle of the engine.The working principle of the engine is to convert the heat energy generated by fuel combustion into mechanical energy through the internal combustion engine, and drive the wheels to move through the transmission system. In the process of working the car engine, three basic conditions need to be met: fuel, oxygen and ignition. The inside of the engine forms pressure changes in the cylinder block, valves, spark plugs and other parts through the up and down movement of the piston, and finally converts the thermal energy generated by the combustion of the internal combustion engine into mechanical energy to drive the car tires to rotate. II. Structure of the engine The structure of the engine refers to the composition of the parts of the engine. The engine is mainly composed of cylinder block, crankshaft, connecting rod, piston, valve, spark plug, oil pump, water pump, radiator, intake pipe, exhaust pipe, oil filter and other components. The cylinder block is the foundation of the engine and is made of cast iron or cast aluminum alloy. The working process of the engine mainlyBorn in the cylinder, the piston moving up and down in the cylinder drives the connecting rod to drive the crankshaft to rotate, and finally completes the combustion of fuel to produce mechanical energy. The function of the valve is to control the inlet and out of gas in the cylinder. The spark plug is part of the ignition system, which is responsible for generating sparks to ignite the mixed gas. The oil pump is a component responsible for pumping gasoline from the fuel tank to the engine fuel intake pipe. The water pump is the key to maintaining the engine at room temperature. It is responsible for pumping the coolant into the cooling path of various parts of the engine. The oil filter is the protection system of the engine. It can filter out debris and dirt in the oil, ensure the smooth circulation of the oil, and effectively protect the engine. III. Classification of engines. Engines can be divided into gasoline engines and diesel engines according to different fuel types. The working principle of the gasoline engine is to ignite the gasoline by ignition, and the resulting explosion can push the piston up and down to complete the movement of the car.Compared with diesel engines, gasoline engines have smaller power and relatively low fuel efficiency. But in terms of driving experience, gasoline engines are more suitable for cars that need fast response and flexible response speed. The working principle of the diesel engine is to drive the piston and rotate the heat energy generated by diesel combustion through high temperature and high pressure to promote the movement of the car. Diesel engines have greater power than gasoline engines, and the fuel efficiency is also higher. However, compared with gasoline engines, diesel engines respond more slowly and need to be heated to start, which will also produce noise and other problems. In summary, the engine is one of the important parts of the car. Its function is to convert the energy generated by fuel combustion into mechanical energy, drive the car tires to rotate, and drive the car to drive. The whole working process of the car engine needs to meet the three basic conditions of fuel, oxygen and ignition.According to the type of fuel, engines can be divided into gasoline engines and diesel engines. When choosing a model, you need to choose the suitable engine type according to the actual needs.

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