Exhaust-gas turbocharger

Abstract

An exhaust-gas turbocharger includes an outer housing, a bearing flange connected to the outer housing by a material joint, and a turbine wheel rotatable about a rotation axis. Formfittingly connected to the bearing flange is an inner housing which is formed with a collar having at least one section in contact with an inner edge of the bearing flange in a direction of the rotation axis of the turbine wheel.

1 . An exhaust-gas turbocharger, comprising:
 an outer housing;   a bearing flange connected to the outer housing by a material joint;   a turbine wheel rotatable about a rotation axis; and   an inner housing formfittingly connected to the bearing flange and formed with a collar which has at least one section in contact with an inner edge of the bearing flange in a direction of the rotation axis of the turbine wheel.   
     
     
         2 . The exhaust-gas turbocharger of  claim 1 , wherein the collar has a bearing-flange-proximal end and is defined by a diameter which increases in a direction toward the bearing-flange-proximal end. 
     
     
         3 . The exhaust-gas turbocharger of  claim 1 , wherein the collar and the edge touch one another in a formfitting manner so that the collar is arranged in undercutting relationship to the edge. 
     
     
         4 . The exhaust-gas turbocharger of  claim 1 , wherein the collar has in a transition zone between the inner housing and the collar a foot region which is defined by a bending radius. 
     
     
         5 . The exhaust-gas turbocharger of  claim 4 , wherein the edge has a geometry which is complementary to a geometry of the bending radius of the foot region. 
     
     
         6 . The exhaust-gas turbocharger of  claim 5 , wherein the collar and the edge touch one another with flat contact at least in an area of the bending radius of the foot region. 
     
     
         7 . The exhaust-gas turbocharger of  claim 1 , wherein the collar and the edge flatly touch one another in the direction of the rotation axis of the turbine wheel at least in one contact area which is oriented in the direction of the rotation axis of the turbine wheel. 
     
     
         8 . The exhaust-gas turbocharger of  claim 1 , wherein the inner housing is made of two half-shells, with one of the half-shells facing the bearing flange and having an S-shaped configuration. 
     
     
         9 . The exhaust-gas turbocharger of  claim 1 , wherein the inner housing has a wall thickness of less than 1.5 mm. 
     
     
         10 . The exhaust-gas turbocharger of  claim 1 , wherein the inner housing has a wall thickness of less than 1 mm. 
     
     
         11 . The exhaust-gas turbocharger of  claim 1 , wherein the collar and the edge are coupled with one another by a material joint. 
     
     
         12 . The exhaust-gas turbocharger of  claim 11 , wherein the collar and the edge are coupled with one another by a radial circumferential weld seam. 
     
     
         13 . The exhaust-gas turbocharger of  claim 1 , wherein the collar engages behind the edge and is coupled with the edge through thermal joining in a circumferential joining zone at a bearing-flange-proximal end of the collar.