Turbocharger bearing housing

Abstract

There is provided a turbocharger bearing housing which is capable of reducing the weight thereof. A bearing housing of a turbocharger contains a shaft connecting a turbine and a compressor, and turnably supports the shaft. The bearing housing of the turbocharger is divided into a turbine-side housing disposed at a turbine side and a compressor-side housing disposed at a compressor side. The compressor-side housing is formed of an aluminum-based material.

1 . A turbocharger bearing housing, comprising:
 a turbine-side housing disposed at a turbine side and a compressor-side housing disposed at a compressor side, the turbine-side housing being connected to the compressor-side housing;   the compressor-side housing is formed of an aluminum-based material, and   the compressor-side housing includes a bearing portion in the form of a through-hole for supporting a shaft that connects a turbine to a compressor, the bearing portion has a lubricating oil passage formed so as to communicate an outer peripheral surface of the compressor-side housing with the bearing portion, so that lubricating oil is supplied to the bearing portion via the lubricating oil passage.   
     
     
         2 . The turbocharger bearing housing according to  claim 1 , wherein the compressor-side housing has, on an outer peripheral surface thereof, a heat sink portion for dissipating heat transferred to the compressor-side housing. 
     
     
         3 . The turbocharger bearing housing according to  claim 1 , wherein the turbine-side housing is formed of stainless steel. 
     
     
         4 . The turbocharger bearing housing according to  claim 1 , wherein a recess is formed on at least one of:
 a surface of the turbine-side housing, which is in contact with the compressor-side housing, and   a surface of the compressor-side housing, which is in contact with the turbine-side housing.   
     
     
         5 . The turbocharger bearing housing according to  claim 2 , wherein the turbine-side housing is formed of stainless steel. 
     
     
         6 . The turbocharger bearing housing according to  claim 2 , wherein a recess is formed on at least one of:
 a surface of the turbine-side housing, which is in contact with the compressor-side housing, and   a surface of the compressor-side housing, which is in contact with the turbine-side housing.   
     
     
         7 . The turbocharger bearing housing according to  claim 3 , wherein a recess is formed on at least one of:
 a surface of the turbine-side housing, which is in contact with the compressor-side housing, and   a surface of the compressor-side housing, which is in contact with the turbine-side housing.