Patent ID: 7513107
Filing Date: 2009-04-07
Classification: F01N,F02C,F02D,F04D,F05D,Y02T

Abstract:
1. A secondary air supply device ( 14 ) comprising a secondary air charger ( 14 ) with a compressor ( 15 ) including a compressor wheel ( 53 ) and with a turbine ( 16 ) including a turbine rotor ( 52 ), the turbine ( 16 ) being driven via the vacuum which prevails in an intake section ( 5 ) of an internal combustion engine and the compressor ( 15 ) having a compressor wheel ( 53 ) which supplies secondary air into an exhaust gas region ( 12 ) of the internal combustion engine, the air which is required by the compressor ( 15 ) and by the turbine ( 16 ) being supplied via a common air filter ( 45 ), the secondary air charger ( 14 ) having a compressor housing ( 47 ) with a frame structure ( 48 , 49 , 50 ) forming a space ( 60 ) with the common air filter element ( 45 ) disposed in the space ( 60 ), said compressor housing ( 47 ) having a tubular element ( 95 ) formed integrally therewith so as to axially project from the housing ( 47 ) into the space ( 60 ) and forming an inflow channel with axial and radial apertures ( 96 ) at its free end for conducting air in a laminar flow from the space ( 60 ) to the compressor ( 15 ) or compressor wheel ( 53 ), the common filter element ( 45 ) surrounding the tubular element ( 95 ) in spaced relationship so as to form an annular air pre-chamber ( 99 ).