Abstract: Inorganic fiber mounting and insulating sheet materials for use in pollution control devices with at least one edge of the inorganic fiber sheet material having at least one group of two or more fibers fused together. A pollution control device comprising such a sheet material. A process for cutting at least one section from a sheet containing inorganic fiber material, where the sheet material is suitable for use in a pollution control device. The fibrous sheet material is cut so that the cut edge has at least one group of two or more fibers fused together. A laser beam can be used to cut the desired section out of the inorganic fiber sheet material.

Abstract: The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material including a low thermal conductivity layer, in which the low thermal conductivity layer includes: a molded material containing an inorganic powder; or a composite material of a porous substrate with an aerogel.

Abstract: A holding sealing material includes a needle mat, a sheet-processed mat, and a sheet-processed mat. The needle mat includes entangled first inorganic fibers and a binder. The sheet-processed mat includes a binder and second inorganic fibers processed into a sheet. The needle mat and the sheet-processed mat are laminated together. Staple fibers having an average fiber length shorter than an average fiber length of the second inorganic fibers are localized in an interface area extending inside the needle mat from an interface between the needle mat and the sheet-processed mat. A binder content of the interface area is higher than a binder content of the needle mat in terms of weight ratio.

Abstract: Mounting materials for pollution control devices comprising biosoluble fibers, heat treated silica fibers having a silica content of greater than about 67 percent by weight (pbw) based on a total weight of the fibers, and intumescent material, with an optional binder component, are disclosed. Methods for making and using the materials are also disclosed.

Abstract: A catalyst comprising a zeolite loaded with copper ions and at least one trivalent metal ion other than Al+3, wherein the catalyst decreases NOx emissions in diesel exhaust. The trivalent metal ions are selected from, for example, trivalent transition metal ions, trivalent main group metal ions, and/or trivalent lanthanide metal ions. In particular embodiments, the catalysts are selected from Cu—Fe-ZSM5, Cu—La-ZSM-5, Fe—Cu—La-ZSM5, Cu—Sc-ZSM-5, and Cu—In-ZSM5. The catalysts are placed on refractory support materials and incorporated into catalytic converters.

Abstract: A housing for an exhaust gas treatment component includes a casing having a first thickness and a first length and at least one sleeve having a second thickness and a second length. The at least one sleeve is at least partially in contact with the outside of the casing and is connected thereto. The second length of the at least one sleeve is shorter than the first length of the casing. An exhaust gas treatment component, an exhaust gas system and a motor vehicle are also provided.

Abstract: A system for treating exhaust gas from an engine is disclosed. The system may include a housing with a first longitudinal axis, an inlet port, and an outlet port. The housing may define a first flow path. A fluid treatment element may be arranged in the flow path. The system may also include a conduit defining a second longitudinal axis and forming a second flow path. The conduit may have first and second tubular portions generally aligned with the second longitudinal axis. The first tubular portion may have a first cross-section, and the second tubular portion may have a second cross-section. An inner diameter of the second cross-section may be less than an inner diameter of the first cross-section. The centerpoint of the first inner diameter may be offset from the centerpoint of the second inner diameter in a direction generally parallel to the first longitudinal axis.

Abstract: A system for treating exhaust gas from an engine is disclosed. The system may include a housing having an inlet port and an outlet port and defining a flow path therebetween. A fluid treatment element may be arranged in the flow path and configured to treat exhaust gas. A conduit may be fluidly connected with at least one of the housing ports and may have first and second tubular portions. The first portion may have a first cross-section with an inner diameter, and the second portion may have a generally elongated second cross-section with an inner width and an inner length. The inner length of the second cross-section of the conduit may be smaller than the inner diameter of the first cross-section of the conduit, and the inner width of the second cross-section of the conduit may be greater than the inner diameter of the first cross-section of the conduit.

Abstract: A housing for a component of an exhaust system, in particular for an exhaust gas purification device, has an envelope that comprises a shrunk clamping portion for the component, a transition portion that adjoins the clamping portion in an axial direction, and a connecting portion that adjoins the transition portion in the axial direction. The diameter of the connecting portion is larger than that of the clamping portion. A method of producing the housing for the component includes providing a tubular envelope, and inserting the component into the envelope. A shrinking step is then carried out in the clamping portion which terminates spaced apart from ends of the envelope as viewed in the axial direction, whereas the axial ends of the envelope are not acted upon.

Abstract: A system includes a particulate matter (PM) filter including an upstream end for receiving exhaust gas and a downstream end. A radiant zoned heater includes N zones, where N is an integer greater than one, wherein each of the N zones includes M sub-zones, where M is an integer greater than or equal to one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones, restricts exhaust gas flow in a portion of the PM filter that corresponds to the selected one of the N zones, and deactivates non-selected ones of the N zones.

Abstract: A system for treating exhaust gas from an engine is disclosed. The system may include a housing, a fluid treatment element, and a conduit. The housing has an inlet and an outlet port and defines a flow path therebetween. The fluid treatment element is arranged in the flow path. The conduit is fluidly connected with at least one of the inlet port and the outlet port and includes a first port having a first axis and a second port having a second axis substantially perpendicular to the first axis. The first port has a first cross-section with an inner diameter. The second port has a second cross-section with an inner width and an inner length. The inner length of the second cross-section is smaller than the inner diameter of the first cross-section, and the inner width of the second cross-section is greater than the inner diameter of the first cross-section.

Abstract: A multilayer mat for mounting a pollution control element in a pollution control device is provided. The mat comprises at least one first layer having at least one lateral edge requiring protection from exposure to (i) mechanical erosion forces generated by the impact of exhaust gases passing through a pollution control device, (ii) high temperatures associated with the exhaust gases, or both (i) and (ii). The mat also comprises at least one second layer having at least one lateral edge that is capable of protecting the at least one lateral edge of the first layer. The width of the first layer is less than the width of the second layer. The first and second layers are stacked one on top of the other such that the at least one lateral edge of the first layer is positioned between the opposite lateral edges of the second layer. The first layer has an exposed major surface.

Abstract: A multilayer mat (10) for mounting a pollution control element (40) in a pollution control device (60). The mat comprises at least one non-intumescent layer comprising ceramic fibers and having a width defined by opposite lateral edges, and at least one intumescent layer comprising an intumescent material and having a width defined by opposite lateral edges. The width of the intumescent layer is less than the width of the non-intumescent layer. The intumescent layer can have an exposed major surface.

Abstract: A mounting mat for an exhaust gas treatment device including high temperature resistant ceramic fibers containing alumina and/or high temperature resistant biosoluble inorganic fibers, organic binder which at least partially liquefies at elevated temperature prior to binder burnout, colloidal inorganic oxide and optionally intumescent material. The exhaust gas treatment device includes a housing, a fragile catalyst support structure resiliently mounted within the housing, and the mounting mat disposed in a gap between the housing and the fragile catalyst support structure.

Abstract: An electrically heated exhaust gas control apparatus includes: a hollow base member that has electroconductivity; a first insulation member that is disposed within the base member and that divides a vertically upper space and a vertically lower space from each other; a honeycomb catalyst formed in each of the vertically upper space and the vertically lower space; a pair of upper electrodes that heat the honeycomb catalyst in the vertically upper space and a pair of lower electrodes that heat the honeycomb catalyst in the vertically lower space; and a control portion that is able to stop electrifying the lower electrodes while continuing to electrify the upper electrodes.

Abstract: Catalyst housings and catalyst silencer housings that include various features for modularity and for servicing and securing catalysts elements, spacers and filter elements are provided.

Abstract: A particulate matter (PM) filter assembly includes a PM filter that filters PM from an exhaust stream and that includes an entry face facing a first direction of flow of the exhaust stream, and a swirl element disposed in the exhaust stream and that includes a blade that directs a portion of the exhaust stream in a second direction of flow that is different than the first direction of flow. The blade directs the portion of the exhaust stream to distribute the exhaust stream over a frontal area of the entry face of the PM filter. A related method of filtering particulate matter from an exhaust stream is also provided.

Abstract: A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a longitudinal direction and includes plural cell walls extending from one end face to another end face along the longitudinal direction to define plural cells. The at least one honeycomb unit includes inorganic particles, an inorganic binder, and inorganic fibers. A degree of orientation of the inorganic fibers in an a-axis direction parallel to the longitudinal direction is about 0.5 or less.

Abstract: A mat material includes inorganic fibers, a first surface, and a second surface opposite to the first surface. The mat material has plural needle traces formed by performing a needling treatment. The needle traces extend from the first surface toward the second surface and from the second surface toward the first surface. There is no depth in the mat material that the needle traces do not reach. There is substantially no protrusion of a bundle of the inorganic fibers at a position on the second surface that lies on a line extending from each of the needle traces extending from the first surface. There is substantially no protrusion of a bundle of the inorganic fibers at a position on the first surface that lies on a line extending from each of the needle traces extending from the second surface.

Abstract: An assembly includes a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and multiple zones. An absorbing layer absorbs microwave energy in one of N frequency ranges and is arranged with the upstream end. N is an integer. A frequency selective filter has M frequency selective segments and receives microwave energy in the N frequency ranges. M is an integer. One of the M frequency selective segments permits passage of the microwave energy in one of the N frequency ranges and does not permit passage of microwave energy in the other of the N frequency ranges.

Abstract: The present invention relates to a process for preparing polytetrahydrofuran or tetrahydrofuran copolymers by polymerization of tetrahydrofuran in the presence of a telogen and/or a comonomer over a fixed bed of an acid catalyst, in which the temperature of the polymerization mixture increases in the direction of flow through the catalyst bed.

Abstract: A support system for a fragile substrate of an exhaust gas treatment device includes a microporous, inorganic insulating layer, which directly or indirectly engages at least a portion of the fragile substrate: and a flexible fibrous mounting mat which directly or indirectly engages at least a portion of said fragile substrate. The support system may support the fragile substrate of a catalytic converter, a diesel particulate trap filter, a selective catalyst reduction unit, or a NOx trap.

Abstract: A mounting mat for an exhaust gas treatment device including inorganic fibers, organic binder, antioxidant, optionally clay and optionally intumescent material. The exhaust gas treatment device includes a housing, a fragile catalyst support structure resiliently mounted within the housing, and the mounting mat disposed in a gap between the housing and the fragile catalyst support structure. Additionally disclosed are methods of making a mounting mat for an exhaust gas treatment device and for making an exhaust gas treatment device incorporating the mounting mat.

Abstract: A device for treatment of exhaust gases includes a housing, a fragile structure resiliently mounted within the housing, and a non-intumescent mounting mat disposed in a gap between the housing and the fragile structure. The mounting mat includes a plurality of inorganic fibers that have undergone a surface treatment to increase the holding force performance of the mounting mat. Also disclosed are methods of making a mounting mat for an exhaust gas treatment device and for making an exhaust gas treatment device incorporating the mounting mat.

Abstract: A catalyst for purifying an exhaust gas can include a carrier having a honeycomb structure, an outer pipe for covering a part of the carrier, and a brazing foil for joining the outer peripheral surface of the carrier and the inner peripheral surface of the outer pipe on the downstream side of the catalyst. The catalyst can be fixed to a support flange such that an axial direction of the catalyst coincides with the direction in which an exhaust gas flows through an exhaust pipe. An upstream end of the brazing foil can be aligned with the upstream end of a catalyst fixing part of the support flange. An upstream end of the catalyst fixing part can be positioned upstream of the axial middle of the carrier. The brazing foil can be provided in a portion from the upstream end of the catalyst fixing part to the downstream side of the carrier. The catalyst can be supported at its generally middle part by the support flange.

Abstract: The invention relates to a honeycomb structure, made from a porous ceramic material, said structure being characterized in that the porous ceramic material which forms it comprises: from 50 to 95% by weight of silicon carbide SiC; from 5 to 50% by weight of at least one ceramic oxide phase, said structure additionally being characterized by a porosity greater than 10%, by a specific surface area greater than 0.5 m2/g and by a pore size distribution of at least bimodal type. The invention also relates to the process for obtaining such a structure and also to the catalytic support or filter obtained from such a structure, after deposition of a catalyst.

Abstract: A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than or equal to one, and wherein the N zones and the M sub-zones are arranged in P layers, where P is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones.

Abstract: A porous ceramic honeycomb filter manufactured from an oxide-based ceramic material having a pore size distribution with d1?7.0 microns. Preferably, the oxide-based material is cordierite or aluminum titanate. Alternatively, the filter contains a cordierite-containing ceramic body with a narrow pore size distribution with db?1.00, wherein db=(d90?d10)/d50. Also disclosed is a batch mixture, method and honeycomb green body made from mixture of inorganic source materials selected from the group of magnesia sources, alumina sources, and silica sources, and a pore former having a narrow particle size distribution with dps?0.90, wherein dps={(dp90?dp10)/dp50}. The pore former is preferably selected from a group consisting of canna starch, sago palm starch, green mung bean starch, and single-mode potato starch.

Abstract: A honeycomb structure includes an inorganic particle, inorganic binder, a honeycomb unit, a first end face, and a second end face. The honeycomb unit includes plural partition walls extending along a longitudinal direction of the honeycomb unit to define through-holes. The first end face is substantially perpendicular to the longitudinal direction and provided at a first end of the honeycomb structure. The second end face is substantially perpendicular to the longitudinal direction and provided at a second end opposite to the first end in the longitudinal direction of the honeycomb structure. First circularity of the first end face and second circularity of the second end face are about 1.5 mm to about 4.0 mm. The circularity of the first end face is different from the circularity of the second end face.

Abstract: A device for treatment of exhaust gases includes a housing, a fragile structure resiliently mounted within the housing, and a non-intumescent mounting mat disposed in a gap between the housing and the fragile structure. The mounting mat includes a plurality of inorganic fibers that have undergone a surface treatment to increase the holding force performance of the mounting mat. Also disclosed are methods of making a mounting mat for an exhaust gas treatment device and for making an exhaust gas treatment device incorporating the mounting mat.

Abstract: A mat member includes inorganic fibers, a first main surface, a second main surface opposite to the first main surface, an edge surface surrounding the first main surface and the second main surface, and an inorganic fiber scattering reduction unit. The inorganic fiber scattering reduction unit is provided on at least a part of the edge surface of the mat member and configured to reduce scattering of the inorganic fibers.

Abstract: An exhaust aftertreatment filter and method is provided for filtering engine exhaust, and reduces the maximum temperature experienced by the filter including during regeneration including during burn-off of trapped contaminant particulate including carbon oxidation combustion.

Abstract: The papermaking sheet member includes inorganic fibers, and the inorganic fibers include a lump-shaped cohered fiber which coheres as a lump.

Abstract: A holding sealer for an exhaust gas purifying device includes a sheet member including inorganic fibers and having a first surface and a second surface substantially facing each other and perpendicular to a direction of thickness of the sheet member. At least one of the first and second surfaces has a profile including projecting portions and depressed portions. The projecting and depressed portions of the profile have a maximum difference, h. The h satisfies about 0.4 mm?h?9 mm.

Abstract: A catalytic converter having an excellent purification efficiency and small pressure loss and a method for producing the same is provided. A catalytic converter comprises a catalyst coating layer which is coated on the surface of the partition walls of the honeycomb structural body having partition walls which divide and form a plurality of cells functioning as fluid passages.

Abstract: An improved ceramic honeycomb filter has at least one porous partition wall defining a channel that is (1) microstructurally different along the length of the channel, (2) microstructurally different than at least a portion of a partition wall defining another channel or (3) combination thereof. The improved filter may be used for filtering Diesel exhaust and may have reduced back pressure and equivalent soot capture efficiency compared to a filter without having said microstructural differences.

Abstract: A method for manufacturing a composite ceramic body with occluding a plurality of pores that are open at its surface of a porous ceramic body, the method includes the steps of impregnating a polysilazane solution including polysilazane having a repetition structure of fundamental units of at least one of [—Si(H)(CnH2n+1)—NH—] and [—Si(CnH2n+1)2—NH—], and a predetermined organic solvent, into the plurality of pores of the porous ceramic body, and heating the porous ceramic body to convert the polysilazane in the plurality of pores into ceramic material.

Abstract: An exhaust filter system includes a particulate filter (PF) that is disposed downstream from an engine. The PF filters particulates within an exhaust from the engine. A heating element heats particulate matter in the PF. A fastener limits expansion movement of the heating element relative to the PF.

Abstract: A device for treatment of exhaust gases includes a housing, a fragile structure resiliently mounted within the housing, and a non-intumescent mounting mat disposed in a gap between the housing and the fragile structure. The mounting mat includes a plurality of inorganic fibers that have undergone a surface treatment to increase the holding force performance of the mounting mat. Also disclosed are methods of making a mounting mat for an exhaust gas treatment device and for making an exhaust gas treatment device incorporating the mounting mat.

Abstract: A catalytic converter has a housing. The housing defines a conduit and has a support wall defining an opening in the conduit. A removable catalyst element covers the opening for treating an exhaust gas passing through the conduit. A removable bar abuts the catalyst element. A first end of the bar is anchored to the wall and a second end of the bar is bolted to the wall thus clamping the catalyst element between the wall and the bar.

Abstract: In an exhaust gas treatment component with a ceramic body for the purification of exhaust gases and a method for making such a component, the ceramic body is disposed in a sheet metal housing consisting of a housing base from which housing sections extend which are hinged to the housing base by webs and which form together a tubular slotted housing part surrounding the ceramic body, the housing sections being tiltable outwardly about the webs for facilitating insertion of the ceramic body into the housing.

Abstract: A method for producing a ceramic honeycomb structure comprises providing a honeycomb body having a side surface, a first cut end surface, a second cut end surface opposite the first end surface, and a maximum width (W), and removing material from at least one of the cut end surfaces of the honeycomb body to reduce the length (L), wherein the step of removing material comprises abrasively removing material from at least one of the ends with a rotating abrasive tool, such as by grinding, and wherein L/W is greater than 0.75. The method may achieve end flatness, parallelism, surface roughness and length accuracy, or combinations thereof which heretofore, were unachievable. Face finished ceramic honeycomb structures having low surface roughness (Ra), high degree of parallelism and accurate lengths are also disclosed.

Abstract: An exhaust gas cleaning apparatus and a filter regeneration apparatus that are capable of cleaning a large volume of exhaust gas without any increase in size of a nonmagnetic member around which a working coil for induction heating is wound. The exhaust gas cleaning apparatus includes a particulate collecting section and a filter regenerating section placed next to each other in the flow direction of an exhaust gas, and a movable frame. The movable frame holds an extension of a filter unit extending from a casing of the particulate collecting section beyond the support frame of the filter regenerating section, and can move the filter unit in the axial direction of the casing. When the filter unit moved by the movable frame passes through the filter regenerating section, a corresponding part of a holding frame disposed in the filter unit is continuously induction-heated to burn collected particulates, such that the filter unit can be regenerated.

Abstract: A diesel particulate filter assembly comprises a diesel particulate filter (DPF) and a heater assembly. The DPF filters a particulate from exhaust produced by an engine. The heater assembly has a first metallic layer that is applied to the DPF, a resistive layer that is applied to the first metallic layer, and a second metallic layer that is applied to the resistive layer. The second metallic layer is etched to form a plurality of zones.

Abstract: A method is provided for producing a highly porous substrate. More particularly, the present invention enables fibers, such as organic, inorganic, glass, ceramic, polymer, or metal fibers, to be combined with binders and additives, and extruded, to form a porous substrate. Depending on the selection of the constituents used to form an extrudable mixture, the present invention enables substrate porosities of about 60% to about 90%, and enables process advantages at other porosities, as well. The extrudable mixture may use a wide variety of fibers and additives, and is adaptable to a wide variety of operating environments and applications. Additives can be selected that form inorganic bonds between overlapping fibers in the extruded substrate that provide enhanced strength and performance of the porous substrate in a variety of applications, such as, for example, filtration and as a host for catalytic processes, such as catalytic converters.

Abstract: A catalytic converter having a housing holding upstream and downstream catalytic material carrying substrates or bricks includes a ring located between the substrates, the ring having a gap therein for receipt of a mid-bed oxygen sensor. The ring traps a layer of insulating material between the ring and the converter housing or shell surface surrounding the inter-substrate gap. The ring is coupled to the housing at a plurality of embossments either by welding or mechanical couplings.

Abstract: A filling percentage of a central portion is larger than that of a peripheral portion at the inlet end surface of an exhaust gas of a honeycomb segment (2) constituting a ceramic filter due to additional filling (13). Thus, an amount of soot accumulated in vents (5) in the central portion of each honeycomb segment (2) is less relative to that in the peripheral portion. This decreases a quantity of heat generated by burning of soot in the central portion, and reduces temperature rise during recycling, thus limiting the maximum temperature of the ceramic filter (1).

Abstract: A method for producing a honeycomb filter from a honeycomb structure having large numbers of flow paths partitioned by cell walls, comprising inserting a tubular member into each of the flow paths, and injecting a plugging material into each of the flow paths from the tubular member to form a plug in each of the flow paths at a position separate from the end surface of the honeycomb structure, the tubular member having an outer diameter that is 40-90% of the opening size of the flow path, the plugging material comprising at least a ceramic material having a maximum particle size that is 85% or less of the inner diameter of the tubular member, and an average particle size of 1 ?m or more.

Abstract: A composite honeycomb structure in which the honeycomb structure is highly functionalized and adapted to have catalytic function, considering pressure loss is provided. A honeycomb structure having average pore diameter of 5 to 200 ?m and specific surface area of 100 to 1500 m2/g is provided. Further, a translucent honeycomb structure and a photocatalyst-carrying translucent honeycomb structure having a photocatalyst carried on a surface of the translucent honeycomb structure and/or contained in the translucent honeycomb structure are provided. Further, an air cleaner and a water purifier using the honeycomb structure and the photocatalyst-carrying translucent honeycomb structure are provided.

Abstract: An improved particulate filtration system has an inlet, for the fluid to be filtered, connected to a housing containing a filter medium such that the fluid passes through the filter medium, and an outlet for the filtered fluid to exit. The filtration system's improvement is the filter medium being comprised of a porous ceramic of fused platelet grains. In a particular embodiment, the porous ceramic is a celsian porous ceramic, where the celsian grains have a hexagonal morphology and display a continuous volume thermal expansion coefficient from 100° C. to 1000° C.