Pressure wave supercharger

Abstract

A pressure wave supercharger includes a cell rotor which is arranged in the housing and driven by an electric motor. The electric motor includes a rotating member which is connected to the cell rotor, and a fixed member. A bearing assembly is provided to simultaneously support the cell rotor within the housing and the rotating member in relation to the fixed member.

What is claimed is: 
     
         1 . A pressure wave supercharger, comprising:
 a housing;   a cell rotor arranged in the housing;   an electric motor for driving the cell rotor, said electric motor including a rotating member which is connected to the cell rotor, and a fixed member; and   a bearing assembly to simultaneously support the cell rotor within the housing and rotatably support the rotating member in relation to the fixed member.   
     
     
         2 . The pressure wave supercharger of  claim 1 , further comprising a cell rotor shaft upon which the cell rotor is mounted and which extends in one piece through the electric motor, wherein the rotating member is mounted to the cell rotor shaft at a distance to the cell rotor and surrounded by the fixed member to configure the electric motor as an internal rotor, said bearing assembly having a first bearing supporting the cell rotor shaft in a space between the electric motor and the cell rotor and a second bearing supporting the cell rotor shaft at an opposite side of the electric motor distal to the first bearing. 
     
     
         3 . The pressure wave supercharger of  claim 1 , wherein the bearing assembly includes a bearing pin which is connected to the housing and extends in one piece through the electric motor, said fixed member being mounted to the bearing pin and surrounded by the rotating member to configure the electric motor as an external rotor. 
     
     
         4 . The pressure wave supercharger of  claim 3 , wherein the bearing assembly has a first bearing to support the bearing pin on one side of the electric motor and a second bearing to support the bearing pin on another opposite side of the electric motor. 
     
     
         5 . The pressure wave supercharger of  claim 3 , wherein the electric motor is accommodated in the cell rotor. 
     
     
         6 . The pressure wave supercharger of  claim 3 , wherein the bearing pin is configured as hollow shaft having channels formed therein for circulation of a coolant. 
     
     
         7 . The pressure wave supercharger of  claim 2 , further comprising an axial compressor arranged on the cell rotor shaft and constructed to raise a pressure level of cooling air being drawn into the cell rotor. 
     
     
         8 . The pressure wave supercharger of  claim 7 , wherein the axial compressor is positioned upstream of the electric motor. 
     
     
         9 . The pressure wave supercharger of  claim 2 , wherein the cell rotor shaft is configured to taper in steps from the cell rotor in a direction of the electric motor. 
     
     
         10 . A pressure wave supercharger, comprising:
 a cell rotor shaft;   a cell rotor arranged in a housing and mounted on the cell rotor shaft;   an electric motor driving the cell rotor and configured as an internal rotor to include an inner rotating member which is connected to the cell rotor, and an outer fixed member, said cell rotor shaft being configured to extend in one piece through the electric motor; and   a bearing assembly supporting the cell rotor shaft and simultaneously supporting the rotating member in relation to the fixed member and supporting the cell rotor in relation to the housing.   
     
     
         11 . The pressure wave supercharger of  claim 10 , further comprising an axial compressor arranged on the cell rotor shaft and constructed to raise a pressure level of cooling air being drawn into the cell rotor. 
     
     
         12 . The pressure wave supercharger of  claim 11 , wherein the axial compressor is positioned upstream of the electric motor. 
     
     
         13 . A pressure wave supercharger, comprising:
 a housing;   a cell rotor arranged in the housing; and   an electric motor for driving the cell rotor, said electric motor being configured as an external rotor to include an outer rotating member which is connected to the cell rotor, and an inner fixed member, said electric motor having a bearing pin connected to the housing upon which the fixed member is arranged.   
     
     
         14 . The pressure wave supercharger of  claim 13 , wherein the electric motor is accommodated in the cell rotor. 
     
     
         15 . The pressure wave supercharger of  claim 13 , wherein the bearing pin is configured as hollow pin and constructed to include a coolant supply.