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Working principle of gasoline engine Gasoline engine is bingo plus update todaya common internal combustion engine, which is widely used in many vehicles such as automobiles and motorcycles. So, what is the operating mechanism of the gasoline engine? This article will introduce in detail the components and working processes of gasoline engines. I. Components of gasoline engine 1. Fuel system The fuel system includes fuel tank, fuel pump, fuel filter, oil pipe, oxygen sensor and other components. The fuel is stored in the fuel tank. After being pressurized by the fuel pump, it enters the fuel filter for filtration, and then transported along the oil pipe to the oxygen sensor and intake manifold. Two. Air intake system The air intake system includes air intake, intake duct, intake manifold, throttle valve, oil mist separator and other components.The air enters the intake duct from the intake and enters the cylinder through the intake manifold. The throttle controls the amount and speed of air entering the cylinder. The oil mist separator separates the oil mist in the air to reduce air pollution. 3. Ignition system The ignition system includes ignition coil, battery, ignition switch, spark plug and other parts. The ignition coil converts the direct current of the battery into high-voltage pulse current, controls the output of high-voltage pulse current through the ignition switch, and finally generates sparks in the spark plug to ignite the fuel and air mixture. Four. Exhaust system The exhaust system includes exhaust manifold, exhaust pipe, catalyst and other components. After the combustion, the exhaust gas enters the exhaust pipe from the exhaust manifold, passes through the catalyst to reduce the emission of harmful gases, and finally discharges from the rear of the car. II. Working process of gasoline engine The working process of gasoline engine can be divided into four stages: suction, compression, combustion and exhaust.1. In the first stroke of inhalation, the piston moves down, the intake valve opens, and the exhaust gas is discharged from the exhaust valve. At the same time, negative pressure is formed in the cylinder, and the air and fuel mixture is inhaled. The ratio of the air and fuel mixture is 14.7:1. Two. In the second stroke of compression, the intake valve is closed, and the mixed gas in the cylinder is compressed to reach the highest pressure. At the same time, the ignition system ignites the spark plug. Under the condition that the fuel and air mixture are on fire, an explosive force is generated, and the piston is pushed down. 3. In the third stroke of combustion, the piston moves down, the gas burns at supersonic speed, and the volume of the mixture expands, generating an explosive force to push the piston down again. Four. In the fourth exhaust stroke, the piston moves upwards, and the exhaust gas dissolved in the compressed chamber is released through the exhaust valve to complete the cycle. III.Advantages and disadvantages of gasoline engines: gasoline engines have the advantages of starting, fast acceleration, sensitive response, light weight, smooth operation and small vibration. However, its disadvantages are also obvious, including low energy efficiency, emission of pollutants, and high maintenance costs. Conclusion In general, the working principle of gasoline engines is relatively simple, but due to its high sensitivity and fast response speed, it can be widely used in many means of transportation such as automobiles and motorcycles. However, gasoline engines also face environmental protection problems that must be dealt with. Manufacturers must continue to innovate and upgrade technology to make them more environmentally friendly, convenient and efficient.

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