Supercharged engine with indirect injection , EGR and process for supercharged air admission

The engine has a discharging duct (46) with an inlet through which supercharged air enters for supplying inserts (16) through orifices (48) of the discharging duct and for supplying inserts (18) through orifices (52) of an injecting duct (50) by a pipe (56). The supercharged air is supplied for obtaining a series circulation of the supercharged air from the discharging duct towards the injecting duct. An independent claim is also included for a method of supplying supercharged air to a supercharged internal combustion engine.