Patent application number | Description | Published |
20080264010 | HONEYCOMB FILTER SYSTEM - A honeycomb filter system comprising a first honeycomb filter disposed upstream: first filter having partition wall matrix of a mean pore diameter of 25 μm or more and below 70 μm and a porosity of 40% or more and below 70%, and carrying an oxidation catalyst containing at least one material selected from the group consisting of platinum (Pt), palladium, ceria, and alumina in at least a part of inner surfaces of pores of the matrix; and a second honeycomb filter disposed downstream; having a surface layer of a peak pore diameter of 0.3 μm or more and below 20 μm which is equivalent to or smaller than that of its matrix, and a porosity of 60% or more and below 95% which is higher than that of the matrix; and having the other specified relations. | 10-30-2008 |
20080311340 | HONEYCOMB STRUCTURE AND PRODUCTION METHOD THEREOF - A honeycomb structure excellent in thermal dispersibility upon heating and being protected from damage due to thermal stress, and an efficient method for manufacturing the honeycomb structure. The structure is provided with porous partition walls, functioning as a filtration layer, through which exhaust gas flowing into the cells can flow out, and plugging portions. Additional plugging portions are further disposed in the open end portions to which the plugging portions are not disposed (unplugged open end portions) not so as to plug unplugged open end portions. Each cross-sectional shape of additional plugging portions in a direction perpendicular to the axial direction forms a predetermined pattern shape as a whole, and a barycenter of the pattern shape is located in almost the center of a cross section of a flow of the exhaust gas in a direction perpendicular to the axial direction. | 12-18-2008 |
20090246454 | HONEYCOMB STRUCTURE - A precise exhaust gas control can be achieved without being influenced by fluctuations of the excess air ratio (λ) between cylinders of engines or the size of the diameter (the sectional area) of the honeycomb structure. The honeycomb structure is formed by a plurality of cells separated from one another by porous partition walls and functioning as fluid flow paths, the honeycomb structure includes: a sensor plug-in hole | 10-01-2009 |
20090246458 | HONEYCOMB STRUCTURE AND MANUFACTURING METHOD OF THE SAME - There is disclosed a honeycomb structure in which while sufficiently maintaining a collection efficiency and a bonding strength of a plugging portion, a thermal shock resistance is improved. A plugging portion | 10-01-2009 |
20100135866 | HONEYCOMB FILTER - A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 μm to 20 μm (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L | 06-03-2010 |
20100239811 | HONEYCOMB STRUCTURE - There is provided a honeycomb structure comprising a plurality of honeycomb segments having porous partition walls separating and forming a plurality of cells and an outer peripheral wall located in the outermost periphery, first cells each open in an end portion on one side and plugged in the other end portion on the other side and second cells each plugged in the end portion on the one side and open in the other end portion on the other side being alternately disposed with the first cells having an area larger than that of the second cells in a cross section perpendicular to the central axial direction, and the outer peripheral wall having protruding portions along an external shape of the first cells and depressed portions along an external shape of the second cells. The honeycomb segments are bonded to each other with a bonding member. | 09-23-2010 |
20100239812 | HONEYCOMB STRUCTURE - There is provided a honeycomb structure including a plurality of honeycomb segments having porous partition walls separating and forming a plurality of cells functioning as fluid passages and an outer peripheral wall located in the outermost periphery. The first cells open in an end portion on one side and plugged in the other end portion on the other side and the second cells plugged in the end portion on the one side and open in the other end portion on the other side are alternately disposed. The first cells have an area larger than that of the second cells in a cross section perpendicular to the central axial direction. The outer peripheral wall has protruding portions along an external shape of the first cells and depressed portions along an external shape of the second cells. The honeycomb segments are bonded together with a bonding member. | 09-23-2010 |
20100247852 | HONEYCOMB STRUCTURE AND BONDED TYPE HONEYCOMB STRUCTURE - A honeycomb structure | 09-30-2010 |
20110224069 | HONEYCOMB CATALYST BODY - There is provided a honeycomb catalyst body comprising a honeycomb base body having porous partition walls forming a plurality of divided cells which extend from one end face of honeycomb base body to its other end face and which function as a fluid passage, and an outer wall present at the outermost peripheral portion of honeycomb base body, plugged portions provided so as to plug part of the plurality of divided cells, and a catalyst loaded on the partition walls of honeycomb base body. The plurality of divided cells include outermost peripheral cells formed by the partition walls and the outer wall, and of the outermost peripheral cells, those cells whose hydraulic diameter ratio to the hydraulic diameters of the cells other than the outermost peripheral cells is 5 to 75%, are through-cells having no plugged portion. | 09-15-2011 |
20130344283 | HONEYCOMB STRUCTURE - There is disclosed a honeycomb structure including: a plurality of honeycomb segments each having porous partition walls, and plugged portions arranged in open frontal areas of the predetermined cells; joining portions in which the plurality of honeycomb segments are joined; and an outer peripheral wall, and having: an aspect ratio (a long axis/a short axis) of 1.2 or more, wherein corners which are regions of the joining portions in the region of 10 mm or less from each intersection between the joining portion and the outer peripheral wall along a direction of the short axis are present in the region of 25 mm or less, and a thickness of each of the joining portions is 0.5 mm or more and 5 mm or less, and a thickness of each of the other joining portions is 1.5 mm or less. | 12-26-2013 |
20140059987 | PLUGGED HONEYCOMB STRUCTURE - A plugged honeycomb structure including a honeycomb structure body, outflow side plugged portions, and inflow side plugged portions. A shape of cells in a cross section is a hexagonal shape. Among six corner portions of each of the hexagonal cells, the corner portion between two partition walls at least one of which is the partition wall separating inflow cells or outflow cells from each other is a specific corner portion, and the corner portion between the two partition walls each of which is the partition wall separating the inflow cell and the outflow cell is an unspecific corner portion. At least one of the specific corner portions is provided with a reinforcing portion so that a shape of the specific corner portion is rounded, and the unspecific corner portions are not provided with the reinforcing portions. | 03-06-2014 |
20140123612 | DUST COLLECTING HONEYCOMB FILTER - A dust collecting honeycomb filter includes a honeycomb base material having porous partition walls to define and form a plurality of cells, and a flange section disposed on an outer periphery of the honeycomb base material and having porous flange partition walls to define and form “a plurality of flange cells extending in the same direction as in the cells”. The flange section is formed so as to project outwardly from the outer periphery of the honeycomb base material, the partition walls and the flange partition walls are continuously connected without forming any boundaries therein, the flange section has flange plugging portions. | 05-08-2014 |
20140287190 | HONEYCOMB STRUCTURE - There is disclosed a honeycomb structure constituted by honeycomb segments, where a honeycomb segment | 09-25-2014 |
20140287191 | HONEYCOMB STRUCTURE - In each honeycomb segment, a first and a second end surfaces are rectangular shapes having the same dimension, and are in a positional relation in which extending directions of long sides of the respective end surfaces are perpendicular to each other, and (X−Y)/2 is from 0.2 to 7 mm, where X is a length of each long side of each of the first and the second end surfaces, and Y is a length of each short side of each of the first and the second end surfaces. The honeycomb segment has two pairs of tapered side surfaces each of which including two side surfaces facing each other so that a distance between side surfaces becomes narrow from the first end surface toward the second end surface end, respectively. | 09-25-2014 |