What is the principle of diesel engine oil feeder invented by diesel engine?

Diesel began to study power machines at 1885. He used the high temperature of compressed air to directly ignite the fuel in the cylinder, and obtained the patent of this machine in 1892. In the same year, he made the first testing machine, namely the original diesel engine. 1893 When the first experiment was carried out, the pressure reached 80 atmospheres, which was the highest pressure recorded by human beings for the first time at that time, but it exploded immediately. 1896 diesel engine test was successful. 1897 diesel oil perfected his invention. 1898 diesel engine has achieved commercial success. He made great changes to 1892 patent, changing pulverized coal combustion into liquid fuel combustion, changing no cooling into water cooling, and changing constant temperature heating into constant pressure heating. During World War I, his diesel engine became the main power of submarines in various countries.