Analysis of the Research Status of Internal Combustion Engines

Since the internal combustion engine came out in the 1960s, it has become a relatively perfect machine through continuous improvement and development. Internal combustion engine has many advantages, such as thermal efficiency, high power, wide speed range, convenient matching and good mobility, so it has been widely used. All kinds of automobiles and tractors, agricultural machinery, engineering machinery and small mobile power stations in the world are powered by internal combustion engines. Ships, conventional submarines and some small aircraft are also propelled by internal combustion engines. The number of internal combustion engines in the world ranks first in the power machinery and plays a very important role in human activities. In the aspect of human technology, any successful invention can not be achieved overnight. The development of the internal combustion engine is the same. The internal combustion engine has gone through many stages of development and has been improved one after another. This paper mainly introduces the historical development of heat engines, and the improvement and use of different types of heat engines in the development.