HS code tagging in tariff databases

Engine structure diagram: in-depth understanding of the power source of the car The HS code tagging in tariff databasesengine is the power source of the car, which can convert fuel into energy and drive the car.The complexity of the engine structure makes many people ignorant of how it works. This article will introduce the structure, working principle and performance parameters of the engine in detail, so as to have a deeper understanding of the power source of the car. 1. The structural engine is mainly composed of shell, cylinder block, crankshaft, connecting rod, piston, intake valve, exhaust valve and other components. Among them, the shell is the overall part that fixes the parts of the engine, and the cylinder block is the bearing part of the internal gas pressure of the engine. The crankshaft is the core component of the engine. It is composed of many connecting rods, spindles and offset shafts, which can convert the linear motion of the piston up and down into the rotational motion of the flywheel. The connecting rod is a component that connects the crankshaft and the piston. Its function is to convert the up and down motion of the piston into the rotational motion of the crankshaft. The piston is a device inside the engine, which compresses fuel and gas and converts it into power to drive the car by sealing it with the cylinder block.The intake valve and exhaust valve are the intake and exhaust control valves in the engine. Their function is to let air and fuel into the car engine and exhaust the exhaust gas at the same time. These parts are necessary for the engine to work, and they are coordinated and work together. Two. Working principle The working principle of the engine can be divided into four cycles: suction, pressure, combustion and discharge. In the first cycle, the intake valve opens and the piston moves down according to the rotation of the crankshaft, so that the gas fills the intake duche and cylinder. In the next cycle, the intake channel is closed and the piston moves up to compress the gas to the highest point. During the combustion cycle, the fuel enters the cylinder and is ignited, and the fuel gas is released and the piston is pushed down to drive the crankshaft to rotate; in the last cycle, the exhaust valve is opened, and the exhaust gas is discharged from the cylinder, pushing the piston up to complete a complete working cycle.This process is repeated over and over again, so as to continue to produce energy and drive cars. 3. Performance parameters Performance parameters are important indicators for evaluating engine performance. Displacement refers to the volume of gas injected into the cylinder by the engine per minute, which represents the size of the engine and the size of the valve. Power is the maximum energy that the engine can output, usually expressed in horsepower or kilowatts. Torque is the torque output by the engine, expressed in Newton meters. Fuel consumption is the speed at which the engine consumes fuel, usually expressed in the number of liters consumed per 100 kilometers. A good engine can always operate more efficiently, generate more power and also reduce fuel consumption and exhaust emissions. The evaluation of the engine by a single performance parameter is not complete. It is necessary to consider these factors comprehensively to obtain a more comprehensive evaluation, and then better judge the advantages and disadvantages of the engine. Summary: The engine is the core component of the car, which is responsible for converting fuel into energy.Understanding the structure, working principle and performance parameters of the engine is very useful for car owners, after-sales service personnel and mechanical experts. High-quality engines can ensure the performance and safety of the car, and continuously reduce fuel consumption and exhaust emissions. Mastering this knowledge and power principle significantly reduces the driving cost and improves the use value of the car.

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