Compressed air generation system and automotive vehicle comprising such a system

Compressed air generation system for an automotive vehicle, comprising:

• a turbocompressor feeding an internal combustion engine of the automotive vehicle with compressed air, an air compressor, at least one compressed air tank connected to an outlet pipe of the air compressor, the air compressor comprising an inlet pipe fed with compressed air from the turbocompressor, wherein the compressed air generation system comprises a pressure regulator placed downstream the turbocompressor and upstream the air compressor and which limits the pressure of the compressed air fed from the turbocompressor to the air compressor to a first threshold, wherein the compressed air generation system comprises a tank sensor adapted to detect the quantity of compressed air contained in the air tank, and a control valve adapted to close the feeding of the inlet pipe of the air compressor with the turbocompressor if the tank sensor detects that the air tank is full, wherein the compressed air generation system comprises a pressure relief valve adapted to release to the atmosphere compressed air accumulated between the pressure regulator and the air compressor, wherein the pressure relief valve is provided in the pressure regulator and formed by a shutter and a part of a piston of the pressure regulator that is movable with respect to the shutter under action of the pressure between the pressure regulator and the compressor, and wherein when the pressure regulator is closed and when the pressure between the pressure regulator and the air compressor becomes superior to a second threshold, inferior to the first threshold, a central channel of the part of the movable piston, that communicates with the atmosphere, is open by a movement of the part of the movable piston away from the shutter.