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Motorcycle engine: design and European Cup liveworking principle Motorcycle is a popular means of transportation. It usually consists of an internal combustion engine and two wheels. The internal combustion engine is a key part of the motorcycle engine. It provides power and speed to enable the motorcycle to travel. This article will discuss the design and working principle of motorcycle engines. There are two main types of engines: four-stroke and two-stroke engines. The four-stroke engine includes four main processes: inhalation, compression, explosion and degassing.During the inhalation process, the piston in the cylinder moves down to suck the fuel and air into the cylinder. During the compression process, the piston moves up to compress the fuel and air. During the explosion, the spark plug ignites the fuel mixture, and the combustion produces high-pressure gas, pushing the piston down. During the degassing process, the piston moves up again to discharge the gas into the exhaust pipe. The two-stroke engine has only two main processes: compression and explosion. At the end of the stroke, the mixture is compressed and ignited, and the piston moves down, completing the two processes of compression and explosion in the same stroke. During the rebound process, the exhaust gas discharges the new mixture at the same time, and the piston moves up. Compared with the four-stroke engine, the two-stroke engine is easier to maintain and lighter, but it is also more susceptible to pollution. Working principle The working principle of motorcycle engines is a series of interrelated processes.First of all, it is necessary to mix fuel and air together, send the mixed gas to the engine, ignite the mixed gas through spark plug ignition, produce explosive combustion in the cylinder, and convert energy into mechanical energy to drive the vehicle. The workflow in the cylinder can be divided into four steps: intake, compression, combustion and exhaust. Intake: The piston begins to move down, mixing air and fuel into the cylinder. The mixed gas is mixed between the fuel injector and the air filter. At this time, the intake valve is open. Compression: In the next stage of the engine, the piston begins to move up, compressing the mixture into a high-pressure state. When it moves to the top of the cylinder, the intake valve closes. In some engines, the piston can stay at the top of the cylinder for a while, causing the mixture to reach a higher pressure, thus generating stronger power. Combustion: At the end of the compression phase, the ignition system triggers the spark plug ignition to ignite the mixture.Combustion produces high-pressure gas, which pushes the piston down and converts it into mechanical energy. During the motorcycle operation, the engine will quickly and continuously inhale, compress, ignite and exhaust to generate continuous energy. Exhaust: In the exhaust stage, the compressed combustion gas is discharged into the exhaust pipe, and the intake valve is opened to prepare for the next cycle. The emitted gas contains exhaust gases full of pollutants, so motorcycle engines must meet emission standards to reduce the impact on the environment. The design of the motorcycle engine will affect its power, torque, responsiveness and economy. Some main design factors include: 1. Number of cylinders - Motorcycle engines can have 1, 2, 3 or 4 cylinders. Multi-cylinder engines usually have higher power and torque than single-cylinder engines. Two. The diameter and stroke of the piston - these parameters affect the volume of the cylinder and are key indicators for measuring the size of the engine.A larger piston usually means higher output power, but it may also increase fuel consumption. 3. The number and size of the valve - the speed and amount of air in and out of the controlled cylinder. Larger intake and exhaust valves can provide more air and gas, generating more powerful energy. Four. Ignition system - The ignition system of the engine controls the timing and speed of igniting the combustion gas. 5. Cooling system - Motorcycle engines need to be cooled to avoid overheating, thus reducing power loss and engine damage. Conclusion The design and working principle of motorcycle engines are complex. The power, torque, responsiveness and economy of the engine are affected by many factors. However, regardless of the engine type or design, its functions are based on specific cycles of continuous inhalation, compression, ignition and exhaust. In the end, we can get on a motorcycle and enjoy endless speed and adventure.

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