In 1922, Germany's Bosch invented a mechanical spray device, which gradually replaced air spray. High-speed diesel engines appeared in the late 1920s and began to be used in automobiles.
In the 1950s, some new serialized and general-purpose diesel engines with more perfect structure and performance were developed, and since then, diesel engines have entered the stage of specialized mass production.
Especially after adopting exhaust gas turbocharging technology, diesel engine has become the most important part of modern power machinery.