Gasoline Direct Injection (GDI) engines are becoming increasingly popular due to the
potential to improve power and fuel consumption. The direct injection of gasoline inside an
engine is classified in three types: wall-guided; air-guided; and spray-guided (also
designated as air-assisted). In the wall-guided, spray impingement on the piston's bowl
head is part of the process to form a stratified charge near the spark plug, as well as to aid in
the fuel mixture preparation. In the air-guided (swirl and tumble) and spray-guided, the …