Patent ID: 9188133
Filing Date: 2015-11-17
Classification: F04D,F05D

Abstract:
1. A product for inhibiting oil from entering a turbocharger compressor comprising: a housing with a compressor wheel disposed in a wheel chamber of the housing to rotate at a range of speeds, the compressor wheel surrounded by a collection volute with a diffuser channeling air from the wheel chamber to the collection volute; a shaft extended through the housing, the shaft connected to the compressor wheel and the shaft supported by a bearing, the bearing lubricated through an oil circuit; wherein a pressure differential between the wheel chamber and the oil circuit inhibits oil from entering the wheel chamber; and wherein the pressure differential is maintained during rotation of the compressor wheel at a low end of the range of speeds by a collar disposed near a tip of the compressor wheel at an entrance to the diffuser, and a retainer engaged in the housing, the retainer holding the collar in a groove of the housing, wherein an opening extends through the housing from the diffuser to the groove, the opening entering the groove at a port located between the retainer and the collar.