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How the engine works When we start a car or TNT Sportsother types of transportation, we usually focus on transportation and reaching the destination, not the working principle behind it, which is especially prominent in the engine. The engine is the heart of transportation, which makes them work. However, understanding how the engine works is crucial for the driver, because it can help you better understand the performance of the car and improve the ability to maintain and troubleshoot the vehicle. What is the engine? An engine is a machine whose purpose is to convert chemical energy into mechanical energy so that the vehicle can run.There are several different types of engines available, including gasoline, diesel, steam and electric, the most commonly used are gasoline and diesel engines. The working principle of the engine The working principle of the engine requires four key steps: inhalation, compression, explosion and exhaust. These processes will be explained in detail in the following paragraphs. Intake analysis of a typical gasoline engine. When driving the engine, the piston will move down to create a weak negative pressure area. At this time, the intake valve under the piston will open, allowing the air and fuel mixture to enter the engine. This mixture of air and fuel is called mixed gas. The intake channel of the engine will introduce the mixed gas into the cylinder, just like the shower head sprays water into the bathtub. After compression, the piston will move upwards, thus compressing the mixed gas and heating it. This process is to ensure that the fuel burned in the mixture and the air molecules are close together.This can minimize the sliding of parts, thus reducing the waste of energy. If you are a car driver, you may have heard the term "compression ratio". This refers to the change in the size of the cylinder during the compression process. Higher compression ratio usually means higher engine performance. Explosion When the mixture is compressed, the fuel and air molecules are very close. The trigger in the cylinder will ignite the mixture and cause an explosion. This explosion will release energy and drive the piston down. This process can be completed in a very short time, so you may have heard of the term "engine speed", which means the number of times the engine rotates in a given time. Higher speed usually means higher engine performance. Finally, the exhaust, the piston rises again to discharge the mixture of exhaust gas (carbon dioxide, water and nitrogen oxides) formed during the explosion.These exhaust gases are discharged from the engine through the exhaust valve, and then discharged out through the exhaust pipe. The exhaust valve is usually fixed, but some modern engines use variable valves to control the exhaust airflow at different speeds. Conclusion Modern automobile engines aim to improve efficiency by minimizing the waste of unburned fuel and air mixtures. This is called combustion efficiency. Engine manufacturers are improving the structure of finished products to make them more energy-saving and environmentally friendly. At the same time, these manufacturers are also researching and developing all-electric vehicles, which are ideal solutions that may replace old fuel vehicles in the future. Understanding the working principle of the engine can help the driver better understand its performance and how to diagnose and solve possible faults.

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