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Engines are UEFA Champions League live streaming appthe core part of cars. Their types are diverse, and each type has its own characteristics and applicable scenarios. This article will take you to understand several mainstream engine types, so that you can better understand the progress of the development of automotive science and technology. I. As the most widely used type of engine, the four-stroke engine is also known as the four-stroke engine. It is composed of cylinder, piston, connecting rod, crankshaft, valve, etc. Its working process includes four steps: 1. Intake: The piston is down, and the valve enters the air mixture. Two. Compression: The piston is up, the valve is closed, and the air mixture is compressed.3. Power: The piston is down, and the mixed gas is ignited, releasing energy to drive the engine. Four. Exhaust: The piston goes up again, the valve opens, and the exhaust gas is discharged. The important characteristics of four-stroke engines are high efficiency, low noise and smooth operation, which are widely used in urban areas and highways. In the current automobile market, the four-stroke engine is a very common type of engine. II. Diesel engine Diesel engine is a power machine caused by the combustion of fuel-mixed air under high temperature and high pressure. Compared with gasoline engines, diesel engines are more efficient and quieter, and are more suitable for long-distance transportation and heavy vehicles. The main difference between diesel engines and gasoline engines is the ignition method of fuel. Diesel engines ignite by burning oil mist with compressed air, while gasoline engines ignite mixed gas through spark plugs.Because diesel releases more energy and more efficiently than gasoline during combustion, diesel engines are not only more efficient and quieter, but also produce more torque, which is more suitable for transportation and heavy vehicles. III. Turbocharged engine Turbocharged engine is an engine that improves engine performance by increasing the intake pressure of the car engine. Through the rotation of the turbocharger, the air is pressurized into the engine, which makes the engine burn stronger, performs better, and can improve the power output. Compared with naturally aspirated engines, the main advantage of turbocharged engines is that they provide stronger power and torque, while also reducing fuel consumption, and have been widely used in high-performance sports cars and racing cars. However, because the turbocharger takes a certain amount of time to form pressure, the turbocharged engine will have certain cooling problems when starting.IV. Hybrid engine Hybrid engine is an engine that uses two different energy sources, electricity and fuel, which are driven collaboratively by batteries and electric motors. Its working method is to improve the energy efficiency and environmental protection of the car by jointly driving the wheels by the fuel engine and the electric motor. Unlike traditional engines, hybrid engines can use electric motors at low speed and when parking, reducing gasoline consumption and exhaust emissions, while fuel engines can provide more reliable power output when driving at high speeds. The advantage of hybrid engines is lower fuel consumption and less exhaust emissions, which has attracted more and more attention. In summary, several types of mainstream engines are introduced above. Each type has its own advantages and disadvantages, and the final choice depends on the specific application scenario.The development of automobile engines has entered a new era, and more efficient, environmentally friendly and humanized technologies will continue to emerge in the future.

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