Compressor for an internal combustion engine

An exhaust gas turbocharger for an internal combustion engine, having an exhaust gas turbine (12) in the exhaust gas section (14) of the internal combustion engine (10);

• and a compressor (16) in the intake section (20) of the internal combustion engine, said compressor having a housing (34) with an inflow channel (36);
• a compressor impeller (38) with an inlet (50) arranged in the inflow channel (36);
• a bypass channel (30) which has a first flow opening (48) upstream of the compressor impeller inlet (50), a second flow opening (52) downstream of the compressor impeller inlet (50) and an axial annular chamber (54) which extends between the first and the second flow openings;
• an axial guide vane structure (32) arranged in the axial annular chamber (54) of the bypass channel (30) so as to impart to the air flowing through the bypass cannel from the second to the first flow opening (52, 48) a swirl corresponding to that of an air mass flow through the inflow channel (36) in the proximity of the pumping limit of the compressor (16), said axial guide vane structure (32) having a narrowest flow cross section (A32) which is not larger than a flow cross section (A52) of the second flow opening (52) of the bypass channel (30).