Catalytic converter for exhaust gas aftertreatment, with improved structure

Abstract

A catalytic converter for aftertreatment of exhaust gases from an internal combustion engine, having a honeycomb body formed by wrapping from at least one metal foil, where the honeycomb body has a center axis that runs along its axial extent from a gas entry side of the honeycomb body up to a gas exit side of the honeycomb body, and the honeycomb body has a multitude of flow channels through which a flow can pass from a gas entry side of the honeycomb body to a gas exit side, wherein the honeycomb body is divided into individual axial sections along its axial extent along which the center axis runs, where the axial sections have flow channel sections that run along different angles relative to the center axis.

1 .- 10 . (canceled) 
     
     
         11 . A catalytic converter configured for aftertreatment of exhaust gases from an internal combustion engine, comprising:
 a honeycomb body formed by wrapping at least one metal foil;   a gas entry side of the honeycomb body;   a gas exit side of the honeycomb body;   a center axis that runs along an axial extent of the honeycomb body from the gas entry side to the gas exit side;   a multitude of flow channels through which a flow can pass from the gas entry side to the gas exit side; and   individual axial sections into which the honeycomb body is divided along the axial extent of the honeycomb body,   wherein the individual axial sections have respective flow channel sections that run along different angles relative to the center axis that make up the multitude of flow channels.   
     
     
         12 . The catalytic converter as claimed in  claim 11 , wherein each flow channel, in accordance with a number of axial sections, has flow channel sections that each extend along one of the axial sections. 
     
     
         13 . The catalytic converter as claimed in  claim 11 , wherein the flow channel sections of the axial section that begins on the gas entry side of the honeycomb body run parallel to the center axis of the honeycomb body and/or the flow channel sections of the axial section that ends on the gas exit side of the honeycomb body run parallel to the center axis. 
     
     
         14 . The catalytic converter as claimed in  claim 11 , wherein directly adjacent axial sections have a different flow direction relative to the center axis. 
     
     
         15 . The catalytic converter as claimed in  claim 11 , wherein a length of the axial sections is between 5 mm and 50 mm measured along the center axis. 
     
     
         16 . The catalytic converter as claimed in  claim 11 , wherein at least one metal foil, in at least one axial section, has slots that run in circumferential direction of the honeycomb body. 
     
     
         17 . The catalytic converter as claimed in  claim 11 , wherein
 the axial section adjoining the gas entry side has flow channel sections that run parallel to the center axis, and   support pins inserted into individual flow channels are permanently bonded to the honeycomb body.   
     
     
         18 . The catalytic converter as claimed in  claim 11 , wherein the honeycomb body, along its axial extent, has alternating axial sections having a first flow direction running parallel to the center axis and a second flow direction running at an angle to the center axis. 
     
     
         19 . The catalytic converter as claimed in  claim 11 , wherein the honeycomb body is formed from a plurality of metal foils stacked one on top of another, which are wound around at least one center of rotation. 
     
     
         20 . The catalytic converter as claimed in  claim 11 , wherein a transition between two directly adjacent axial sections in each case constitutes a deflection point for a flow direction of a flow channel.