HS code mapping for infant formula imports

Working principle of automobile engine (operation mechanism of automobile engine) Automobile engine is HS code mapping for infant formula importsthe heart of a car and the source of vehicle power. Understanding the working principle of car engines can help us better understand the performance and characteristics of cars. This article will introduce the working principle of automobile engines in detail. 1. The composition of the automobile engine includes cylinder block, piston, connecting rod, crankshaft, camshaft, valve, piston ring and other components. Among them, the cylinder block is the main body of the engine. Several cylinders are installed on it to complete the combustion process in the cylinder, thus generating power. Two. The working principle of the fuel mixing and ignition car engine is: the mixed gas (mixed with air and fuel in a certain proportion) is sent into the cylinder and burned through ignition to make the piston move to output power.The fuel in the mixed gas is usually gasoline, which needs to be mixed with air in a certain proportion (called the mixed gas ratio) to burn. In order to achieve the formation of mixed gas, the car engine has a fuel supply system that will spray gasoline into the air. At the same time, there should be a set of ignition system to ignite the mixed gas, make the mixed gas burn and generate power. 3. Working cycle Working cycle refers to the process of entering and leaving the mixed gas in one or more cylinders in the engine. Each cylinder has components such as pistons, connecting rods, crankshafts and camshafts, and their motion states determine the output power and characteristics of the engine. Simply put, the working cycle is divided into four stages: 3.1 In the intake stage, the piston in the cylinder moves down, causing the valve to open. In the process, the mixed gas enters the cylinder. After the piston reaches the lowest position, the valve closes.At the same time, the camshaft is inherited by the crankshaft and drives the movement of the valve. 3.2 In the compression stage, the piston moves upwards to compress the mixed gas in the cylinder. At this time, the mixed gas is compressed into a high-pressure gas and is ready to burn after ignition. At the same time, the crankshaft is also moving to compress the mixture brought in the first air intake. 3.3 In the combustion stage, in the combustion stage, the piston is close to the top of the cylinder head, and the ignition system triggers the ignition. The mixed gas burns in a short time and expands rapidly, producing high-temperature and high-pressure gas, which drives the piston down. In this process, the camshaft drives the opening of the valve to exhaust the exhaust gas. 3.4 Exhaust stage In the exhaust phase, the piston moves to the lowest point and the valve opens again, so that the exhaust gas and a small amount of mixed gas are discharged from the cylinder. At this time, the crankshaft and the camshaft cooperated again to discharge the exhaust gas from the cylinder.Four. To sum up, the working principle of the car engine is to carry out this working cycle continuously. The working cycle of each cylinder does not interfere with each other, but it is basically the same. Through the processes of continuous movement, compression, ignition and gas discharge, we can drive the movement of the car, thus realizing the convenience of our daily travel. In a word, understanding the working principle of the car engine can help us better maintain and use the car, extend the service life of the car, and improve the performance and efficiency of the car.

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