Surgical instruments HS code classification

Engine principle video (automotive engine principle animation,Surgical instruments HS code classification deep and shallow) The engine is the heart of the car, and it is the core that the vehicle can drive. The engine is also one of the most complex and important parts of the car. Its principle and working process determine the performance and quality of the car. This article will introduce the working principle and structure of automobile engines in depth through the engine principle video. Engines can be divided into several categories: internal combustion engines, steam engines and electric motors, of which internal combustion engines occupy the most important position. Internal combustion engines can be divided into fuel engines and gas engines, among which fuel engines can be divided into diesel engines and gasoline engines. This article will mainly introduce the principle and structure of diesel engines and gasoline engines.First of all, let's take a look at the gasoline engine. A gasoline engine is an internal combustion engine that drives the movement of the piston through gasoline combustion. It is composed of cylinder, piston, crankshaft, camshaft, valve, fuel system, ignition system and cooling system. The principle of the gasoline engine is to use the spark plug to introduce the mixed gas (mixed with air and gasoline proportionally) into the cylinder after ignition, and then ignite it under the energy action of the spark plug to make the mixed gas in the cylinder burn, producing high-temperature and high-pressure gas to push the piston down, drive the crankshaft to rotate, and finally start the car. Next is the diesel engine. A diesel engine is an internal combustion engine that drives the movement of the piston through diesel combustion. It includes cylinder, piston, crankshaft, camshaft, fuel injector, valve, supercharger and cooling system and other parts. The principle of diesel engine is in gas.After injecting high-pressure diesel into the cylinder, the high-temperature and high-pressure gas generated by compressed combustion is used to push the piston down, drive the crankshaft to rotate, and finally start the car. The accuracy and time period of the fuel injection cylinder are very critical, and it needs to be done through a high-precision injector and control system. In addition to the fuel system, the diesel engine also has a supercharger, which compresses air through the supercharger to improve the combustion efficiency of fuel, thus improving mechanical efficiency and power performance. In general, both gasoline engines and diesel engines are internal combustion engines that use combustion to drive the movement of the piston, but the two have different fuels, and the structure and control systems are also different. In addition to the two engines introduced above, there are also some new engines, such as hybrid engines and electric vehicles. Hybrid engine refers to the use of a variety of power sources, such as fuel engines, electric motors, etc., to drive cars.It can take into account both dynamics and economy. Electric vehicles, on the other hand, use electricity entirely to drive cars. They do not need fuel and have excellent environmental protection performance. In a word, the engine is the core part of the car, and the design and optimization of its structure and principle determine the performance and quality of the car. Understanding the principle and working process of the engine is very helpful for improving driving skills and choosing a car.

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