Wheeled road vehicles equipped with light power and self-propulsion were not like this at the beginning of invention, and the development of automobiles has a long process.
After 100 years of continuous improvement and innovation, it has condensed the wisdom and intelligence of human beings. Thanks to the support of many industries such as petroleum, steel, aluminum, chemical industry, plastics, machinery and equipment, electric power, road network, electronic technology, finance and so on, it has driven their development and become a wide variety of vehicles with complete specifications and widely used in various fields of social and economic life. Since 1970, the number of global automobiles has almost doubled every 15 years, and the global automobile production in 20 13 years was 87.38 million.
1859, lenoir of France replaced the steam of reciprocating steam engine with a mixture of gas and air, and made a two-stroke gas-fired internal combustion engine by spark ignition. France and Britain both produced a small batch.
186 1 year, De Rorschach of France put forward the working cycle mode of four-stroke internal combustion engine with equal volume combustion of intake, pressure, power and exhaust, and was granted a patent by the French authority on 1862 1.06.