Turbocharger

Abstract

A turbocharger may include a shaft having a central hole longitudinally formed therein, a supply hole for supplying oil to the central hole, and an exhaust hole for discharging the oil from the central hole to the outside of the shaft. The turbocharger may also include a turbine disposed at a side of the shaft and rotated by an exhaust gas, a compressor disposed at the other side of the shaft and compressing intake air, a bearing rotatably supporting the shaft, and a center housing mounted with the bearing.

What is claimed is: 
     
         1 . A turbocharger comprising:
 a shaft having a central hole longitudinally formed therein, a supply hole for supplying oil to the central hole, and an exhaust hole for discharging the oil from the central hole to an outside of the shaft;   a turbine disposed at a side of the shaft and rotated by an exhaust gas;   a compressor disposed at the other side of the shaft and compressing intake air;   a bearing rotatably supporting the shaft; and   a center housing mounted with the bearing.   
     
     
         2 . The turbocharger of  claim 1 , wherein the supply hole and the exhaust hole are disposed with a predetermined distance therebetween in a longitudinal direction of the shaft. 
     
     
         3 . The turbocharger of  claim 2 , wherein the supply hole is formed close to the compressor and the discharge hole is formed close to the turbine. 
     
     
         4 . The turbocharger of  claim 2 , wherein the supply hole and the exhaust hole each is formed at a predetermined angle in a rotational direction of the shaft. 
     
     
         5 . The turbocharger of  claim 2 , wherein the central hole is formed in an area corresponding to the bearing. 
     
     
         6 . The turbocharger of  claim 2 , wherein the oil cools and lubricates a periphery of the bearing and the shaft while circulating an oil line formed in the center housing, the supply hole, the central hole, and the exhaust hole.