TURBO COMPRESSOR SYSTEM FOR AN INTERNAL COMBUSTION ENGINE COMPRISING A COMPRESSOR OF RADIAL TYPE AND PROVIDED WITH AN IMPELLER WITH BACKSWEPT BLADES

摘要

A turbocharger unit ( 18 ) for an internal combustion engine ( 10 ) with at least one exhaust line ( 15, 16 ) for conducting exhaust gases away from the combustion chamber ( 11 ) of the engine and at least one inlet line ( 12 ) for supplying air to the combustion chamber. The turbocharger unit includes a turbine ( 17 ) which interacts with a compressor ( 19 ) for extracting energy from the exhaust gas flow of the engine and pressurizing the inlet air of the engine. The compressor ( 19 ) is of radial type and provided with an impeller with backswept blades ( 35 ) where the blade angle (beta_b2) between an imaginary extension of the center line of the blade between root section and tip section in the direction of the outlet tangent and a line ( 36 ) which connects the center axis of the impeller to the outer tip of the blade is at least roughly 45° . The turbine ( 17 ) which drives the compressor ( 19 ) is of radial type.