ELI5: Explain Like I'm 5

Partially premixed combustion

Partially premixed combustion is a way of combining fuel and air that works well in engines. When you mix fuel and air together, you can get them to "burn" or turn into energy. In this type of combustion, the fuel and air are mixed together only a little bit, rather than completely mixed together. This type of combustion creates fewer pollutants and is more efficient than other types of combustion.
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