After the development of 100 years, the automobile has developed from the oldest steam engine drive to four-cylinder and six-cylinder engine drive, and a series of automobiles focusing on different application scenarios, such as sports cars, trucks, off-road vehicles and so on. Today, I will take you to know what stages the automobile development has gone through. The first stage: the invention and improvement of the steam engine Before the appearance of non-human means of transportation, all labor was done by people and animals, which greatly limited the development of social productive forces. 1705, invented the world's first practical steam engine. Although the steam efficiency of this machine is extremely low, its positive influence is indelible. Since then, various improved steam engines have been invented, the most famous of which is the "Watt Steam Engine". Although most of the early steam engines were used to transport coal and other minerals, there were still inventors devoted to the research of steam engine-driven cars. 1769, Frenchman Juno made the world's first steam-driven tricycle. With the help of the large boiler in the car, the running speed of the car can be kept at 3.5 ~ 3.9 km/h1876. The German inventor Otto invented the first reciprocating piston single-cylinder internal combustion engine, which greatly improved the power and thermal efficiency of the internal combustion engine, and it became a reality to drive the car with the internal combustion engine.

2. The second stage: entering the era of internal combustion engine.

With the continuous development of scientific and technological revolution, people realize that a more efficient engine is needed to drive social production activities, so the internal combustion engine appears. Internal combustion engine is a kind of power machinery, which is a heat engine that directly converts its heat energy into power by burning fuel inside the machine. Compared with the steam engine in the old industrial age, its appearance greatly improved the power and thermal efficiency. With the continuous optimization and improvement of internal combustion engines and the extensive exploitation and popularization of oil, automobiles driven by gasoline engines have mushroomed. People began to accept this kind of fast, comfortable car, and car orders poured in from all over the world, so this stage is also a stage of continuous development and growth for major automobile manufacturers.

3. The third stage: rapid development of science and technology.

With the continuation of peacetime and the continuous improvement of social technology and people's living standards, people's requirements for cars are no longer just speed and appearance, but begin to pursue safety, comfort and versatility. Therefore, in the development of automobiles in the past decades, automobiles have added many cutting-edge technologies to ensure the safety of occupants, such as airbags and anti-lock braking systems, which make our travel more comfortable and safe. In recent ten years, with the coming of energy crisis, new energy vehicles have gradually stood on the historical stage. It is believed that with the continuous progress of science and technology, the automobile industry will also usher in the next technological innovation.