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Working principle of automobile engine (working mechanism of automobile engine) Automobile engine is Hearthstone Arena win ratethe heart of the automobile and the power source of automobile. Although the shape, model and power of automobile engines are different, their basic working principle is the same. This article will explain in detail the working principle and operation process of automobile engines. 1. The composition and function of automobile engines Automobile engines are mainly composed of cylinders, pistons, connecting rods, crankshafts, valves and fuel supply systems. The function of the car engine is to mix fuel and air and burn it through ignition to generate energy and convert it into kinetic energy, thus driving the car.Two. The operation process of the automobile engine The operation process of the automobile engine mainly includes four stages: intake, compression, combustion and exhaust. 1 Air intake stage: the piston moves down from the upper part of the cylinder, and a certain negative pressure is formed in the cylinder. At this time, the valve opens and a large amount of air and a certain amount of fuel mixture enter. 2 Compression stage: the piston moves up to compress the mixed gas in the cylinder. At this time, the valve is closed, and the mixed gas between the cylinder and the fuel supply system is well sealed. 3 Combustion stage: In the state of high pressure, the ignition system ignites, resulting in the combustion of the mixed gas and the release of heat energy. The high temperature and high pressure caused by combustion make the piston move down and push the crankshaft to rotate. 4 Exhaust stage: While the piston moves down and pushes the valve open, the exhaust gas and the carbon dioxide formed after combustion are ejected from the cylinder and discharged from the tail of the car through the exhaust pipe.At the same time, the valve opens again to start the next cycle. The above four stages constitute a complete operating cycle of the automobile engine, which is called the "four-stroke cycle". 3. Parameters of automobile engines The three main parameters of automobile engines are: displacement, power and torque. 1 Discharge refers to the volume of gas accommodated by the cylinder per cycle, usually in liters (L). 2 Power refers to the energy output generated by the automobile engine in a unit of time, usually expressed in horsepower (HP) or kilowatt (KW). 3 Torque refers to the torque generated by the car engine, which is usually expressed in Newton·m (N·m). The above three parameters can reflect the performance and power performance of the car engine, which is an important factor to consider when buying a car. Four. Automobile emissions and its control technology The combustion process of automobile engines will produceExhaust gas and harmful substances, such as carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, particulate matter, etc. Therefore, modern cars often adopt emission control technology to reduce exhaust emissions. At present, the main control technologies used include ternary catalytic converters, particulate filters, oxygen sensors, automotive chemical injectors, etc. These technologies can effectively reduce automobile exhaust emissions and reduce environmental pollution, which meets the relevant requirements of current environmental protection awareness. Conclusion The working principle of automobile engine is the basis of automobile driving. Understanding the principle of automobile engine and its operation process will help us better understand the mechanism of automobile operation, so as to better carry out automobile maintenance. At the same time, under the current background of environmental protection, we should pay more attention to the control of automobile emissions and reduce environmental pollution.

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