Patent ID: 7287379

Claim:
A turbocharger system for an internal combustion engine ( 10 ) having at least one exhaust line ( 15 , 16 ) for evacuating exhaust gases from the combustion chamber ( 11 ) of the engine and at least one inlet line ( 12 ) for supplying air to said combustion chamber, said turbo-charging system comprising a high-pressure turbine ( 17 ) which interacts with a high-pressure compressor ( 19 ) forming a high-pressure turbo unit ( 18 ) with a common rotation axis ( 31 ) and a low-pressure turbine ( 21 ) which interacts with a low-pressure compressor ( 23 ) forming a low-pressure turbo unit ( 22 ) with a common rotation axis ( 32 ) for extracting energy from the exhaust flow of the engine and pressurizing the inlet air of the engine, said low-pressure turbine ( 21 ) is of the axial type and the high-pressure turbo unit ( 18 ) and the low-pressure turbo unit ( 22 ) being sequentially located on substantially coincident axes ( 31 , 32 ) and with the high-pressure turbine ( 17 ) and the low-pressure turbine ( 21 ) placed adjacent to each other and coupled together by an intermediate piece ( 20 ) configured as a flow duct arranged to allow a certain eccentricity between the two rotation axes, and the low-pressure turbo unit ( 22 ) is attached to one part of the internal combustion engine ( 10 ) and the high-pressure turbo unit ( 18 ) is attached to another part of the engine ( 10 ).