HS code correlation with duty rates

Principle of engine (analysis of engine operation principle) The HS code correlation with duty ratesengine is the heart of automobiles and other means of transportation, and bears the important task of driving the vehicle forward. How is the principle of the engine realized? This article will analyze the operating principle of the engine.I. Classification of engines Engines can be classified according to their working principle and fuel type. In terms of working principle, the engine is divided into a four-stroke engine and a two-stroke engine. The four-stroke engine includes four working links: suction, compression, ignition and exhaust, while the two-stroke engine only has two working links: suction and compression. In terms of fuel types, engines are divided into gasoline engines and diesel engines. Gasoline engines use gasoline as fuel, while diesel engines use diesel. The principle of a four-stroke engine. In a four-stroke engine, each working cycle contains four strokes. The following is the specific description: 1. Intake stroke - In the intake stroke, the piston moves down and sucks in a large amount of mixed gas (a mixture of gasoline and air) into the cylinder. Two. Compression stroke - In the compression stroke, the piston moves up to compress the mixture to a high pressure.This increases the temperature of the mixture and makes it easier to ignite. 3. Ignition stroke - In the ignition stroke, the igniter ignites the mixture at the appropriate time, causing an explosion. This released huge energy and pushed the piston to the next link. Four. Exhaust stroke - In the exhaust stroke, the piston moves up to discharge the exhaust gas from the cylinder and refill the cylinder. These strokes are repeated continuously, so that the engine is kept running. At this time, the crankshaft will continue to rotate, driving the movement of the connecting rod and piston. III. The principle of diesel engines is different from that of gasoline engines. Diesel engines use compression ignition technology to ignite fuel. In a diesel engine, the two strokes of intake and compression are combined into one stroke, which is called the compression stroke. 1. Compression stroke - In the compression stroke, the piston moves up to compress a large amount of air to a very high pressure.This makes the temperature of the air high enough to ignite the fuel. Two. Fuel injection - In the fuel injection process, the fuel is injected into the cylinder through a high-pressure pump and then mixed with high-temperature and high-pressure air. This ignites the fuel, generating huge energy to push the piston. 3. Exhaust stroke - In the exhaust stroke, the piston discharges the gas into the cylinder, just like the gasoline engine. IV. Factors affecting engine performance Whether the engine is efficient or not depends on many factors, some of which are as follows: 1. Fuel - High-quality fuel can improve combustion efficiency and keep the engine clean and carbon-free. Two. Ignition system - An efficient ignition system can ensure that the mixed gas is ignited unobstructed and make the engine run faster. 3. Cylinder design - The shape and size of the cylinder will directly affect how the mixed air flows through and ignites, thus affecting the engine performance.Four. Lubrication - By using good lubricating oil, it can reduce engine friction and extend its life. To sum up, the engine is the core of automobiles and other means of transportation. The principle is to ignite the mixed gas and generate energy to drive the cylinder through the working links of inhalation, compression, ignition and exhaust. Factors such as fuel quality, ignition system, cylinder design and lubrication system can affect the efficiency of engine performance. Knowing this knowledge, you can better understand cars and keep them healthy and safe.

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