Most families now own or at least own a car. But how much do we know about car engines? There are many kinds of automotive engines. According to different power sources, automotive engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrid engines.
Diesel engines
Gasoline engines
Electric vehicle engines
Hybrid engines
Diesel engines
A diesel engine is an engine that burns diesel oil to obtain energy and releases it. The advantage of this kind of automotive engine is that the thermal efficiency and economy are better, and no ignition system is needed. At the same time, the fuel supply system of the diesel engine is relatively simple, so the reliability of this kind of automotive engine is better than that of the gasoline engine. Because it is not restricted by deflagration and the need for diesel spontaneous combustion, the compression ratio of the diesel engine is very high. Both thermal efficiency and economy are better than gasoline engines. At the same time, under the same power situation, diesel engines have large torque and low speed at maximum power, which is suitable for the use of trucks.
Gasoline engines
A gasoline engine is an engine that uses gasoline as a fuel to convert internal energy into kinetic energy. Because gasoline is low in viscosity and evaporates quickly, it can form a uniform mixture with the air outside the cylinder, and then suck the mixture into the cylinder, or use a gasoline injection system to inject gasoline into the cylinder to expand the gas and do work. The disadvantages of this kind of automotive engine are lower thermal efficiency than diesel engines, higher parking consumption, more complicated ignition systems than diesel engines, and lower reliability and ease of maintenance than diesel engines. This kind of automotive engine is characterized by high speed, simple structure, lightweight, low cost, stable operation, and convenient use and maintenance. Gasoline engines are widely used in automobiles, especially small cars.
Electric vehicle engines
Electric vehicle engines refer to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. The electric motor is also called (commonly known as the motor). The main function of this car engine is to generate driving torque as the power source for electric vehicles. The characteristics of car driving are frequent starting, accelerating, decelerating, stopping, and so on. High torque is required at low speeds or when climbing, and low torque is required at high speeds. The speed range of this kind of automotive engine should be able to meet the requirements of the automobile from zero to the maximum speed, that is, the electric motor is required to have high specific power and power density.
Hybrid engines
Hybrid engines generally refer to hybrid power, which is a mixture of fuel (gasoline, diesel, etc.) and electric energy. A hybrid vehicle is a vehicle driven by an electric motor as the auxiliary power of the engine. Hybrid vehicles have high fuel economy performance and superior driving performance, which can reduce fuel consumption. Simply put, compared with cars of the same size, fuel costs are lower. Moreover, the electric motor of the auxiliary engine can generate strong power at the moment of starting, so the owner can enjoy a stronger start and acceleration. At the same time, this kind of automotive engine can also achieve a higher level of fuel economy.
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