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* Motorcycle engine principle Motorcycle engine is Real-time supply chain event updatesthe core that drives motorcycles forward. Similar to car engines, motorcycle engines are also internal combustion engines. The difference is that they are more compact and require higher speeds to maximize their power.This article will discuss in depth from the working principle, structure, performance and maintenance of motorcycle engines. I. Engine working principle Motorcycle engines usually use a 4-stroke internal combustion engine, and its working principle is as follows: first stroke: intake stroke. The valve opens, the piston moves down, and a low-pressure area is formed in the cylinder. The intake valve opens, and the mixed air enters the cylinder through the intake chamber and intake pipe. The second stroke: compression stroke. The intake valve is closed, the piston moves upwards, the valve is closed, forming a high-pressure area. The mixed gas is compressed, the volume is reduced, and the temperature rises. The third stroke: ignition stroke. The igniter ignites to let the mixed gas burn, producing high-temperature and high-pressure gas, which pushes the piston down. The fourth stroke: exhaust stroke. The piston moves upwards again, the exhaust valve in the cylinder opens, and the high-pressure gas is discharged from the cylinder to prepare for the next cycle.II. Engine structure Motorcycle engines are usually divided into two types: single-cylinder engines and multi-cylinder engines. The single-cylinder engine has only one cylinder, and the multi-cylinder engine has two or more cylinders. After combining multiple cylinders in a multi-cylinder engine, it can greatly improve engine power and fuel efficiency. Common types of motorcycle engines on the highway include single-cylinder, double-cylinder, three-cylinder and four-cylinder. In addition to the number of cylinders, the structure of the motorcycle engine also includes the following aspects: (1) Piston: The piston is one of the key parts of the engine, which is used to convert high-temperature and high-pressure gas into linear power. At the same time, it also transfers energy to the connecting rod to drive the crankshaft to rotate. ( 2) Connecting rod: The connecting rod is a part that connects the piston and the crankshaft, which converts linear motion into rotational motion. ( 3) Crankshaft: The crankshaft is the central part of the engine, which converts the rotational force of the connecting rod into the power of the driving wheel.(4) Vale: The valve is used to control the flow of gas in the cylinder, which is divided into two types: intake valve and exhaust valve. Motorcycle engines are usually equipped with four valves: an intake valve and an exhaust valve corresponding to a cylinder. ( 5) Ignition: The ignition is used to ignite, ignite the mixed gas, push the piston down, and drive the motorcycle forward. III. Engine performance The performance of motorcycle engines directly affects the power and fuel efficiency of motorcycles. The performance indicators of motorcycle engines generally include the following aspects: (1) Rated power/torque: The rated power and torque of the engine are important indicators to measure engine performance. The rated power indicates the maximum power that the engine can produce, and the rated torque indicates the maximum torque output of the engine. ( 2) Fuel consumption: Fuel consumption is an indicator to measure the fuel economy of the engine.Generally speaking, the greater the engine power, the more fuel consumption, so a balance between the performance of the engine and the fuel economy is needed. ( 3) Speed: The speed of the engine refers to the number of laps rotated by the engine, usually in rpm or RPM. At high speed, the motorcycle engine can exert maximum power, but it will also increase the fuel consumption and wear of the engine. IV. Engine maintenance is very important for motorcycle engines. The following are some common methods for maintaining motorcycle engines. ( 1) Replace the oil in time and keep it clean. ( 2) Check the crankshaft and connecting rod regularly to ensure that they function well. ( 3) Check the engine cooling system and make sure it is working normally. ( 4) Keep the valve and igniter in good condition to ensure that the fuel is fully burned. ( 5) Check the condition of the cylinder and piston and ensure their normal operation.In a word, the motorcycle engine is the core part of the motorcycle performance, and its working principle, structure, performance and maintenance need to be fully understood and mastered. Only through careful maintenance and upkeep can the motorcycle always run well and bring the best driving experience to the rider.

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