A catalysed filter system for treating particulate-containing exhaust gas from a stationary emission source comprises an elongate filter element comprising porous walls which define a hollow section and a substrate material supporting a catalyst component disposed within the hollow section, the arrangement being such that gas entering the hollow section of the elongate filter element from across the porous walls thereof must contact the substrate material supporting the catalyst component before exiting the hollow section of the elongate filter element.

A particulate filter, including: a pillar-shaped honeycomb structure portion having a plurality of first cells extending from a first end face to a second end face, the first end face being open and the second end face being plugged, and a plurality of second cells extending from the first end face to the second end face, the first end face being plugged and the second end face being open, in which the first cells and the second cells are alternately arranged adjacent to each other with porous partition walls interposed therebetween; and a low thermal conductive layer covering a part or the whole of an outer peripheral side surface of the pillar-shaped honeycomb structure portion, the thermal conductivity in a thickness direction of the low thermal conductive layer being 0.6 W/(m.Math.K) or less.

Ceramic honeycomb bodies and methods for canning the bodies are disclosed herein. The honeycomb bodies comprise a porous ceramic honeycomb structure. The honeycomb structure comprises a network of cells defined by walls that extend in an axial direction about a longitudinal axis from an inlet end to an outlet end of the honeycomb structure. The honeycomb structure also comprises a portion of cells with protrusions. The portion of cells with protrusions supports a greater concentration of catalyst, as compared to a portion of cells without protrusions. The portion of cells with protrusions is disposed off-center with respect to the longitudinal axis of the honeycomb structure such that the portion of cells with protrusions (and greater concentration of catalyst) corresponds to areas of high exhaust flow through the structure.

The present invention relates to an air cleaner and, more particularly, to an air cleaner provided with a housing divided into an outer housing and an inner housing, wherein the outer housing and the inner housing are separated from one another, a photocatalytic filter and a collection filter are installed in the inner housing, and air flows even through the space between the inner housing and the outer housing. The present invention provides an air cleaner comprising: an outer housing defining an inlet and an outlet; an inner housing disposed in the outer housing and formed to be separated from the outer housing; a fan installed in the inner housing to forcibly discharge air in the outlet direction; a photocatalytic filter installed in the inner housing and disposed in the direction in which air from the fan is discharged or in the direction opposite to that in which the air is discharged; and an ultraviolet light source disposed upstream of the photocatalytic filter in the direction of airflow created by the fan in order to irradiate the photocatalytic filter with ultraviolet rays.

The invention relates to a dust collector for gaseous fluids and to a method for manufacturing the dust collector. The dust collector, used for removing dust from gaseous fluids containing fine dust, is equipped with a periodic cleaning system and comprises one or more filtering assemblies (1) that have filtering elements (2). The filtering elements (2) have a tubular extension and are closed at one end. They are made of a rigid or semirigid filtering material and are kept in contact with each other along a direction parallel to their length; the filtering elements (2) enclose, between them, flow channels (3) open at one end and closed at the end opposite the end at which the filtering elements (2) are closed. The method for manufacturing a filtering assembly (1) of the dust collector comprises the steps of: permanently deforming a sheet of a filtering material so as to obtain a corrugated sheet (8) with a cross-section defined by repetitions of -shaped forms that are connected to each other; coupling two deformed sheets, so as to keep the straight parts of the reshaped forms in contact and to obtain rows of filtering elements (2); connecting the various rows of filtering elements to each other, by placing them in contact along generatrices of the elements facing each other; closing the ends of the filtering elements (2) and of flow channels (3) that are formed between the filtering elements.

A silencer for an exhaust gas system of a motor vehicle has an external housing that has at least one inlet opening and at least one outlet opening for exhaust gas. The silencer includes a silencer chamber and a filter monolith through which exhaust gas flows, and which is circumferentially surrounded by the silencer chamber. Also disclosed is a motor vehicle with at least one silencer.

An article, includes a porous ceramic honeycomb body and a housing disposed on at least one of an outer periphery of the porous ceramic honeycomb body and opposing end faces of the porous ceramic honeycomb body, wherein the housing exerts a compressive force on the porous ceramic honeycomb body in at least one of radial direction and axial direction. A method of making the article, includes heating to greater than or equal to about 200 C the housing, crimping the housing tightly around the honeycomb body while the housing is greater than or equal to about 200 C, and cooling the housing. The housing exerts a compressive force on the porous ceramic honeycomb body in at least one of radial direction and axial direction by shrinking on cooling more than the honeycomb body.

An exhaust gas purifying device includes: a columnar honeycomb carrier provided in an exhaust channel; a tubular case member housing the honeycomb carrier; and a retaining member surrounding the outer circumference of the honeycomb carrier. The honeycomb carrier has, in the outer circumferential edge of an inlet-side end face and an outlet-side end face, respectively, sloped surfaces sloped toward a direction in which the length in the center axis direction of the honeycomb carrier decreases. Of the retaining member, ends in the center axis direction of the honeycomb carrier extend to the sloped surfaces of the honeycomb carrier, and the ends have tapered parts which are longer in the center axis direction of the honeycomb carrier on the side facing the case member than on the side facing the honeycomb carrier.

A particulate filter for exhaust-gas aftertreatment in an internal combustion engine has a housing on which an inlet and an outlet are configured on opposite ends. The particulate filter also has a filter element arranged in the housing, said filter element having essentially parallel filter channels that are each alternatingly closed on the inlet side or on the outlet side by a closure in order to prevent gas from passing directly through the filter element. In this context, the filter channels can be divided into a first group of filter channels which are closed on the outlet side by a closure, and into a second group of filter channels which are closed on the inlet side by a gas-tight closure. The filter channels of the second group are additionally closed on the outlet side by a high-porosity closure in order to improve the cleaning effect of the particulate filter.

An exhaust purifying device provided in an exhaust passage of an internal combustion engine comprises: a column-shaped honeycomb carrier; a cylindrical case member adapted to house the honeycomb carrier; a holding member provided between the honeycomb carrier and the case member to surround the outer circumference of the honeycomb carrier; buffer members provided on a peripheral edge of the edge surface of at least one side of an inflow side edge surface and an outflow side edge surface of the honeycomb carrier so as to regulate the movement of the honeycomb carrier in the central axis X direction; and setting members secured to the case member to regulate the movement of the buffer members by allowing their position regulation parts to contact the buffer members; wherein the buffer members are provided, on the outer circumferential sides, with recesses into which the position regulation parts of the setting members are fitted.