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Types of engines: Classification and UEFA TVfeature analysis Engines are the core components of driving machinery and power sources. They can convert energy into power output, thus driving the vehicle forward. The classification of engines is mainly based on its working principle, structure, characteristics and application fields.In this article, we will introduce the most common types of engines and analyze their characteristics. I. Internal combustion engine Internal combustion engine is the most common type of engine. It is based on burning fuel to generate energy conversion and make it output power to the outside. Internal combustion engines are divided into gasoline engines and diesel engines. 1. Gasoline engine is an internal combustion engine fueled by gasoline, also known as a gasoline engine. Its working principle is to ignite the spark plug after mixing gasoline with air, forming an explosion, and then pushing the piston forward to generate a driving force. Features of gasoline engine: a. It has good acceleration performance and strong sprint ability at the start. B. It is relatively easy to operate and easy to refuel. C. The sound is relatively quieter than that of diesel engines. D. The rotation speed is fast, and the output power is greater than that of diesel engines. Two. Diesel engine diesel engine uses diesel as fuel.The working principle of the internal combustion engine is to add diesel to the cylinder through compressed air to form a spontaneous combustion ignition to produce high-temperature and high-pressure gas, which pushes the piston forward, thus generating power output. Features of diesel engine: a. High fuel efficiency and good economy. B. Large torque, suitable for load-bearing and towing work. C. Strong durability, high efficiency and long service life. D. The sound is louder than that of gasoline engines, and small and light cars are commonly used. II. Steam engine Steam engine is an external combustion engine powered by water vapor. It belongs to the traditional automobile engine and has been gradually phased out. Its working principle is to generate power and convert energy by burning water into steam. There are two types of steam engines: single-cylinder and multi-cylinder. Features of steam engine: a. The work starts slowly and needs to be warmed up. B. Fuel is used more and consumes resources.C. The speed change is not very flexible, and acceleration and braking need to be operated in advance. D. The maintenance cost is relatively high and the technical requirements are high. III. Electric motor is an engine powered by electric energy, which is one of the latest types of engines at present. Electric motors are an important part of automobile electrification, which can reduce pollution and energy consumption and protect the environment. Features of electric motor: a. Environmental protection, reducing pollution and harmful gases. B. Mute, the vehicle running noise is low, and it is more comfortable. C. Low energy consumption, and battery charging can output power. D. The steering is flexible and more sensitive, which is more suitable for urbanized travel. In summary, the types and characteristics of engines are different, and the type of fuel consumed, the strength of the efficiency, torque and driving force, and the scope of application are different. Therefore, when choosing an engine, it is necessary to choose according to various factors such as the specific model and purpose.

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