Internal combustion engine with Atomic supercharging and supercharging control method

Internal combustion engine, in particular for a motor vehicle, of the type comprising a compressor 2 mounted in an intake pipe 3, 9 to increase the pressure of the intake gas supplied to the engine 1, a turbine driving the compressor 4 and mounted in a line 5, 14 exhaust gases from the engine, and a pressure control device of the intake gas, with a controlled valve 18 to bypass the exhaust gas arranged in the exhaust pipe upstream of the and a turbine bypass valve 16 mounted in a bypass conduit 15 in parallel with the compressor, characterized in that the bypass valve 16 is controlled by a regulating device 40 and a switching means 54 is provided for selecting the control the pressure of the inlet gas or by the bypass valve, or by the bypass valve, according to engine operating parameters.