Sealed honeycomb structrure

Abstract

A sealed honeycomb structure may include porous walls dividedly forming inlet cells and outlet cells extending from an end surface of an inlet side to an end surface of an outlet side, an outlet side sealing portion, and an inlet side sealing portion, wherein at least one outlet cell is a reinforced cell, where a reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which the walls on a cross-section vertical to an extending direction of the cell cross each other, and wherein the inlet cell is a non-reinforced cell where the reinforced part is not formed at all the corner portions at which the walls on the cross-section vertical to the extending direction of the cell cross each other.

1 . A sealed honeycomb structure comprising: porous walls dividedly forming a plurality of cells extending from an end surface of an inlet side to an end surface of an outlet side, the plurality of cells being a plurality of fluid channels;
 an outlet side sealing portion mounted at openings of predetermined cells in the end surface of the outlet side so as to form inlet cells where the end surface of the inlet side is open and the end surface of the outlet side is sealed; and   an inlet side sealing portion mounted at openings of remaining cells in the end surface of the inlet side so as to form outlet cells where the end surface of the outlet side is open and the end surface of the inlet side is sealed,   wherein at least one cell among the outlet cells is a reinforced cell where a reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which the walls on a cross-section vertical to an extending direction of the cell cross each other,   wherein the inlet cell is provided with a reinforced part for reinforcing the inlet cell at at least one corner portion at which the walls on the cross-section vertical to the extending direction of the cell cross each other, and   wherein the number of the corner portions reinforcing the inlet cell is smaller than the number of the corner portions reinforcing the outlet cell.   
     
     
         2 . A sealed honeycomb structure comprising: porous walls dividedly forming a plurality of cells extending from an end surface of an inlet side to an end surface of an outlet side, the plurality of cells being a plurality of fluid channels;
 an outlet side sealing portion mounted at openings of predetermined cells in the end surface of the outlet side so as to form inlet cells where the end surface of the inlet side is open and the end surface of the outlet side is sealed; and   an inlet side sealing portion mounted at openings of remaining cells in the end surface of the inlet side so as to form outlet cells where the end surface of the outlet side is open and the end surface of the inlet side is sealed,   wherein at least one cell among the outlet cells is a reinforced cell where a reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which the walls on a cross-section vertical to an extending direction of the cell cross each other, and   wherein the inlet cell is a non-reinforced cell where the reinforced part is not formed at all the corner portions at which the walls on the cross-section vertical to the extending direction of the cell cross each other.   
     
     
         3 . The sealed honeycomb structure of  claim 2 , wherein the reinforced cell comprises a reinforced corner portion at which the reinforced part is formed and a non-reinforced corner portion at which the reinforced part is not formed. 
     
     
         4 . The sealed honeycomb structure of  claim 2 , wherein the reinforced cell is configured that the reinforced parts are formed at all the corner portions of the reinforced cell. 
     
     
         5 . The sealed honeycomb structure of  claim 2 , wherein the inlet cell and the outlet cell are alternately disposed across the wall. 
     
     
         6 . The sealed honeycomb structure of  claim 2 , wherein an opening shape of the inlet cell on the cross-section vertical to the extending direction of the cell is the same as an opening shape of the outlet cell without the reinforced part on the cross-section vertical to the extending direction of the cell. 
     
     
         7 . The sealed honeycomb structure of  claim 2 , wherein a ratio of an intersecting distance of an intersecting part of the walls to an average thickness of the wall without the reinforced part is within a range of 1.5 to 9.3, and
 wherein the intersecting distance of the intersecting part of the walls is a distance from a surface of the reinforced part of the reinforced cell to a surface of another cell disposed across an intersecting point of the walls dividedly forming the reinforced cells.   
     
     
         8 . The sealed honeycomb structure of  claim 2 , wherein each reinforced part occupies 0.05 to 20% of an area of an opening portion without the reinforced part on the cross-section vertical to the extending direction of the cell. 
     
     
         9 . The sealed honeycomb structure of  claim 1 , wherein the reinforced cell comprises a reinforced corner portion at which the reinforced part is formed and a non-reinforced corner portion at which the reinforced part is not formed. 
     
     
         10 . The sealed honeycomb structure of  claim 1 , wherein the reinforced cell is configured that the reinforced parts are formed at all the corner portions of the reinforced cell. 
     
     
         11 . The sealed honeycomb structure of  claim 1 , wherein the inlet cell and the outlet cell are alternately disposed across the wall. 
     
     
         12 . The sealed honeycomb structure of  claim 1 , wherein an opening shape of the inlet cell on the cross-section vertical to the extending direction of the cell is the same as an opening shape of the outlet cell without the reinforced part on the cross-section vertical to the extending direction of the cell. 
     
     
         13 . The sealed honeycomb structure of  claim 1 , wherein a ratio of an intersecting distance of an intersecting part of the walls to an average thickness of the wall without the reinforced part is within a range of 1.5 to 9.3, and
 wherein the intersecting distance of the intersecting part of the walls is a distance from a surface of the reinforced part of the reinforced cell to a surface of another cell disposed across an intersecting point of the walls dividedly forming the reinforced cells.   
     
     
         14 . The sealed honeycomb structure of  claim 1 , wherein each reinforced part occupies 0.05 to 20% of an area of an opening portion without the reinforced part on the cross-section vertical to the extending direction of the cell.