Patent ID: 6726441
Filing Date: 2004-04-27
Classification: F01D,F04D,F05D

Abstract:
An air compressor, in particular for an internal combustion engine, comprising a housing with a flow duct structure, a compressor wheel with an inlet end rotatably supported in said flow duct structure, a recirculation arrangement including a bypass structure with a bypass flow area for recirculating some of the air from the compressor wheel back to the compressor inlet end and including a recirculation ring arranged in said bypass structure around said compressor wheel, said recirculation ring having a plurality of flow passages distributed uniformly around the circumference of said recirculation ring and having at the radial inner end of the recirculation ring adjacent the compressor wheel inflow orifices in communication with the compressor flow duct and outflow orifices at the radially outer end of the recirculation ring in communication with the bypass flow area, said flow passages extending in a direction deviating from the radial direction such that the outflow orifice are circumferentially offset relative to the respective inflow orifices in the direction of rotation of the compressor wheel.