Looking back on the history of engine generation and development, it has experienced three stages of development: steam engine, external combustion engine and internal combustion engine.
External combustion engine The external combustion engine, which means that its fuel burns on the outside of the engine, was invented in 1816 by R. Stirling of Scotland, and is also known as the Stirling engine.
The engine converts the heat generated by this combustion into kinetic energy, and Watt's improved steam engine is a typical external combustion engine, when a large amount of coal combustion generates heat to heat water into a large amount of water vapor, high pressure is generated, and then this high pressure is pushed mechanical work, thus completing the transition of thermal energy to kinetic energy.
Internal combustion engine Understand what is an external combustion engine, also know what is an internal combustion engine. The biggest difference between this type of engine and the external combustion engine is that its fuel burns inside it. There are many kinds of internal combustion engines, common gasoline engines, diesel engines are typical internal combustion engines. Unusual rocket engines and jet engines assembled on airplanes also belong to internal combustion engines. However, due to the different power output mode, the first two and the latter two there are huge differences. Generally speaking, the former is used mostly on the ground, and the latter is used in the air.
Of course, some car manufacturers in order to set a new world speed record, but also installed jet engines on cars, but this is always a special example, there is no applicability of mass production.
Folding gas turbine In addition, there are gas turbines, which are characterized by combustion to produce high-pressure gas, using the high-pressure gas to propel the blades of the gas turbine to rotate, thus outputting power. Gas turbine spree is wide lying, but because it is difficult to fine-tune the output of power, so cars and motorcycles rarely use gas turbines, only some cars have used gas turbines.
