Exhaust Gas Purification Member, the Outer Dimensions of Which are Standardized

Abstract

An exhaust gas purification member includes at least one block to purify exhaust gases and a casing having an inner surface surrounding the purification block and delimiting a channel for circulating the exhaust gases. At least one element supports the purification block, and is interposed between the inner surface of the casing and a side wall of the purification block. The inner surface of the casing includes at least one portion protruding towards the purification block. The supporting element is interposed between the side wall of the purification block and the protruding portion.

1 . A purification member for purifying exhaust gas, comprising:
 at least one purification block to purify exhaust gas, the purification block having a side wall;   a casing having an inner surface surrounding the purification block, the casing delimiting a channel for circulating exhaust gases, the purification block being housed in said channel; and   at least one supporting element to support the purification block, wherein the inner surface of the casing comprises at least one protruding portion protruding towards the purification block, the supporting element being interposed between said side wall of the purification block and said protruding portion.   
     
     
         2 . The purification member according to  claim 1 , wherein each protruding portion is an embossed protrusion. 
     
     
         3 . The purification member according to  claim 1 , wherein the purification block and the casing have cross-sections of similar polygonal shapes. 
     
     
         4 . The purification member according to  claim 1 , wherein each protruding portion extends and protrudes over a height of less than 3.5 mm. 
     
     
         5 . The purification member according to  claim 1 , wherein the casing includes an outer surface, and the casing comprises stiffening ribs, laid out on the outer surface of the casing. 
     
     
         6 . The purification member according to  claim 1 , wherein the casing includes two half-casings connected to each other. 
     
     
         7 . The purification member according to  claim 6 , wherein the half-casings are covered at a connection interface with connecting elements. 
     
     
         8 . The purification member according to any  claim 1 , wherein the inner surface of the casing includes several walls separated by corners, each wall including at least one protruding portion. 
     
     
         9 . The purification member according to  claim 1 , wherein the inner surface of the casing includes at least two protruding portions that extend and protrude over various heights. 
     
     
         10 . The purification member according to  claim 1 , wherein:
 the purification block is a parallelepiped and has a length L in a longitudinal direction, a first width l 1  in a first transversal direction perpendicular to the longitudinal direction, and a second width l 2  in a second transversal direction perpendicular to the longitudinal direction and perpendicular to the first transversal direction,   the casing has at least one first protruding portion on each side in the first transversal direction,   the casing has at least one second protruding portion on each side in the second transversal direction,   and wherein in the first transversal direction:
     h   1   =F   1 ( H   1   ;l   1   ;BW;GBD;E   p ) 
   and, in the second transversal direction:
     h   2   =F   2 ( H   2   ;l   2   ;BW;GBD;E   p ) 
   
       with:
 h 1  is a height of each first protruding portion of the casing in the first transversal direction; 
 h 2  is a height of each second protruding portion of the casing in the second transversal direction; 
 F 1  is a first function; 
 F 2  is a second function; 
 H 1  is a first external dimension of the casing in the first transversal direction, and H 2  is a second external dimension of the casing in the second transversal direction; 
 Ep is a thickness of walls forming the casing; 
 BW is a Basis Weight of each supporting element; 
 GBD is a given Gap Bulk Density of the purification member. 
 
     
     
         11 . The purification member according to  claim 10 , wherein:
 in the first transversal direction:   
       
         
           
             
               
                 h 
                 1 
               
               = 
               
                 
                   1 
                   2 
                 
                  
                 
                   ( 
                   
                     
                       H 
                       1 
                     
                     - 
                     
                       l 
                       1 
                     
                     - 
                     
                       2 
                       × 
                       
                         BW 
                         GBD 
                       
                     
                     - 
                     
                       2 
                       × 
                       
                         E 
                         p 
                       
                     
                   
                   ) 
                 
               
             
           
         
         and, in the second transversal direction: 
       
       
         
           
             
               
                 h 
                 2 
               
               = 
               
                 
                   1 
                   2 
                 
                  
                 
                   ( 
                   
                     
                       H 
                       2 
                     
                     - 
                     
                       l 
                       2 
                     
                     - 
                     
                       2 
                       × 
                       
                         BW 
                         GBD 
                       
                     
                     - 
                     
                       2 
                       × 
                       
                         E 
                         p 
                       
                     
                   
                   ) 
                 
               
             
           
         
       
     
     
         12 . A manufacturing method for manufacturing a purification member for purifying exhaust gas, comprising:
 at least one purification block to purify exhaust gas, the purification block having a side wall;   a casing having an inner surface surrounding the purification block, the casing delimiting a channel for circulating exhaust gases, the purification block being housed in said channel; and   at least one supporting element to support the purification block, wherein the inner surface of the casing comprises at least one protruding portion protruding towards the purification block, the supporting element being interposed between said side wall of the purification block and said protruding portion,   wherein the manufacturing method comprises:   measuring dimensions of the purification block, and   making each protruding portion to have a respective height depending on the measured dimensions of the purification block.   
     
     
         13 . The manufacturing method according to  claim 12 , further comprising weighing each supporting element, the height of each protruding portion also being dependent on the respective measured mass of each supporting element. 
     
     
         14 . The manufacturing method according to  claim 12 , further comprising assembling each supporting element on the purification block, followed by assembling the casing around the purification block, so that each supporting element is clamped between the purification block and a corresponding protruding portion.