Residue Burned Patents (Class 55/282.3)
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Patent number: 7534482Abstract: A honeycomb structural body is constituted with a ceramic block made by arranging a plurality of through-holes side by side in the longitudinal direction through partition walls and sealing either one end portions of these through-holes. The ceramic block of this honeycomb structural body is made of a composite member consisting of ceramic particles and amorphous silicon, so that the honeycomb structural body has an excellent compression strength even if its porosity is increased, and is less in the lowering of mechanical strength even if it is heated to a high temperature, and is excellent in the durability.Type: GrantFiled: October 7, 2003Date of Patent: May 19, 2009Assignee: Ibiden Co., Ltd.Inventor: Yutaka Yoshida
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Patent number: 7524360Abstract: A particulate filter for an exhaust system configured to manage an exhaust flow is disclosed. The particulate filter includes a housing and a wall-filtration element contained therein. The wall-flow filtration element has an inlet end and an outlet end, the outlet end having a first end-plug. The wall-flow filtration element has pores defining a porosity sufficient to trap exhaust particulates and to pass ash particles, including the first end-plug having a pore size equal to or greater than 55 micrometers and equal to or less than 250 micrometers.Type: GrantFiled: December 30, 2005Date of Patent: April 28, 2009Assignee: GM Global Technology Operations, Inc.Inventor: Shi-Wai S. Cheng
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Patent number: 7524350Abstract: This honeycomb structural body is made from a sintered body having a pore structure wherein pores having a pore size ranging from 1.0 ?m to about 150 ?m are a first pore group and pores having a pore size ranging from about 0.006 or more to less than 1.0 ?m are a second pore group in a pore size distribution curve, one peak in the pore size distribution is existent in the first pore group region and plural peaks in the pore size distribution are existent in the second pore group region.Type: GrantFiled: April 10, 2007Date of Patent: April 28, 2009Assignee: Ibiden Co., Ltd.Inventor: Masafumi Kunieda
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Patent number: 7521025Abstract: An object of the present invention is to provide a honeycomb structural body for use in a filter, which can be provided with a large amount of catalyst, can suppress an increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the inorganic fibers, which form the honeycomb structural body, are arranged in such a manner that more fibers are aligned along a face perpendicular to the forming direction of the through holes rather than aligned along a face in parallel with the forming direction of the through holes.Type: GrantFiled: June 10, 2004Date of Patent: April 21, 2009Assignee: Ibiden Co., Ltd.Inventors: Kazushige Ohno, Masafumi Kunieda
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Patent number: 7520911Abstract: A porous cordierite ceramic honeycomb article with increased mechanical strength and thermal shock resistance. The porous cordierite ceramic honeycomb article has MA<2220, or MT>2660 wherein MA=3645(IA)?106(CTE)+19(d90)+17(% porosity), MT=4711(IT)+116(CTE)?26(d90)?28(% porosity), and a CTE?9×10?7/° C. in at least one direction. A method of manufacturing is also disclosed wherein the inorganic raw material mixture contains talc, an alumina-forming source, a silica-forming source, and 0-18 wt. % of a kaolin or calcined kaolin containing not more than 8 wt. % of a fine kaolin source having a median particle diameter of less than 7 ?m, wherein the fired porous ceramic cordierite honeycomb article has a porosity<54% . Alternatively, if greater than 8 wt. % of the fine kaolin source is used, then a slow ramp rate is utilized from 1200° C. to 1300° C. of not more than 20° C./hr.Type: GrantFiled: November 30, 2005Date of Patent: April 21, 2009Assignee: Corning IncorporatedInventors: Douglas Munroe Beall, Gregory Albert Merkel, David John Thompson
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Patent number: 7517379Abstract: A method of blocking partial cells at the periphery of diesel filters is disclosed. The method comprises plugging the partial cells with a suitable plugging material. In one embodiment, a line of plugging material is applied to either or both of the end faces of the diesel filter along an outermost row of partial cells to block same. In another embodiment, the outermost wall the diesel filter is first beveled to form a beveled edge and uniquely off-set the partial cells. Then the beveled edge has applied thereto a plugging material, such as a line or bead. A honeycomb structure having reduced number of unplugged partial cells at the periphery is also disclosed.Type: GrantFiled: December 16, 2005Date of Patent: April 14, 2009Assignee: Corning IncorporatedInventor: Charles Mitchel Sorensen, Jr.
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Publication number: 20090090089Abstract: One embodiment of the invention includes a diesel particulate filter comprising a first face and a second face; a bottom electrode layer formed over the first face of the diesel particulate filter; a middle resistive layer formed over a portion of the bottom electrode layer; and a top electrode layer formed over a portion of the middle resistive layer.Type: ApplicationFiled: October 8, 2007Publication date: April 9, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Amanda Phelps, Kevin W. Kirby, Daniel J. Gregoire
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Patent number: 7514136Abstract: A honeycomb structure includes a bonded honeycomb segment article in which a plurality of honeycomb segments are integrally bonded on mutual bonding surfaces thereof via bonding material layers; and an outer peripheral coating layer which covers an outer peripheral surface of the bonded honeycomb segment article. The honeycomb structure has a structure in which a plurality of cells constituting fluid channels are arranged in parallel with one another in a central axis direction. Solid cells are beforehand arranged in four corners of each of opposite end faces of the honeycomb segment and/or the center of each side of an outer peripheral portion of each of the opposite end faces of the honeycomb segment, and the solid cells are integrated with the honeycomb segment.Type: GrantFiled: October 20, 2006Date of Patent: April 7, 2009Assignee: NGK Insulators, Ltd.Inventor: Jun Okumura
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Patent number: 7513921Abstract: An exhaust gas filter apparatus includes a particulate filter for collecting a particulate from an exhaust gas. The exhaust gas filter also includes a electromagnetic radiation resonator to heat a portion of the particulate to ignite the particulate and regenerate the particulate filter.Type: GrantFiled: October 24, 2005Date of Patent: April 7, 2009Assignee: HRL Laboratories, LLCInventors: Amanda C. Phelps, Kevin W. Kirby, Daniel Gregoire
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Publication number: 20090084077Abstract: 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.Type: ApplicationFiled: March 2, 2007Publication date: April 2, 2009Inventor: Yoshihiro Hatanaka
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Publication number: 20090071110Abstract: A regeneration system comprises a particulate matter (PM) filter including a microwave energy absorbing surface, and an antenna system comprising N antennas and an antenna driver module that sequentially drives the antenna system in a plurality of transverse modes of the antenna system to heat selected portions of the microwave absorbing surface to regenerate the PM filter, where N is an integer greater than one. The transverse modes may include transverse electric (TE) and/or transverse magnetic (TM) modes.Type: ApplicationFiled: January 11, 2008Publication date: March 19, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Eugene V. Gonze, Michael J. Paratore, JR., Kevin W. Kirby, Amanda Phelps, Daniel J. Gregoire
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Publication number: 20090074630Abstract: A system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas, a downstream end and zones. The system also includes a heating element. A control module selectively activates the heating element to inductively heat one of the zones.Type: ApplicationFiled: September 12, 2008Publication date: March 19, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Eugene V. Gonze, Michael J. Paratore, JR., Kevin W. Kirby, Amanda Phelps, Daniel J. Gregoire
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Publication number: 20090071338Abstract: 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.Type: ApplicationFiled: January 11, 2008Publication date: March 19, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Eugene V. Gonze, Mark R. Chapman
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Patent number: 7503957Abstract: A honeycomb structure includes partition walls arranged in an X-direction and intersecting partition walls so as to form a plurality of cells extending to an other-end portion from a one-end portion through an axial direction. There are disclosed a honeycomb structure in which intersecting portions of the partition walls include an intersecting portion (lacking portion) lacking in the one-end portion, a method of manufacturing the honeycomb structure, and a discharge fluid purification system comprising the honeycomb structure. The honeycomb structure is able to inhibit the opening from being blocked and is easily manufactured.Type: GrantFiled: August 21, 2007Date of Patent: March 17, 2009Assignee: NGK Insulators, Ltd.Inventor: Yukihito Ichikawa
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Patent number: 7503955Abstract: A filter body (3) which is intended, in particular, for the filtration of particles contained in the exhaust gases from an internal combustion engine. The filter body (3) is formed by bonding filter blocks (11) using a joint (17). An outer surface (16) of the first of the blocks (11), which is disposed opposite the second of the blocks (11) and which is in contact with the joint (17), includes at least one projection- and/or cavity-type irregularity (30a, 30b).Type: GrantFiled: July 12, 2004Date of Patent: March 17, 2009Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeanInventor: Sébastien Bardon
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Patent number: 7497889Abstract: Arranged within a cylindrical housing are capturing cells each including a cylindrical outer electrode capable of capturing particulates and an inner electrode inserted into the outer electrode and lined at its outer surface with a dielectric. A divergent exhaust unit is arranged on an end of the housing so as to guide exhaust to interiors in the respective capturing cells. A convergent exhaust unit is arranged on the other end of the housing so as to communicate with a gap between an inner surface of the housing and outer surfaces of the outer electrodes in the respective cells. The inner and outer electrodes are connected to an electric discharge controller.Type: GrantFiled: June 2, 2004Date of Patent: March 3, 2009Assignee: Hino Motors, Ltd.Inventors: Takatoshi Furukawa, Yoshihide Takenaka, Koichi Machida
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Patent number: 7488368Abstract: The ceramic honeycomb structure has a plurality of cells partitioned by porous partition walls and extending through the structure in an axial direction, one end portion of a predetermined cell is plugged with a plugging portion constituted of a plugging material with which the cell is filled, and the other end portion of a remaining cell is plugged with the plugging portion on a side opposite to the end portion of the predetermined cell. In the ceramic honeycomb structure, a sectional numerical aperture of the plugging portion in the vicinity of the partition wall is smaller than that of the plugging portion in the vicinity of a central axis, and a difference between the sectional numerical apertures is 10% or more.Type: GrantFiled: October 19, 2005Date of Patent: February 10, 2009Assignee: NGK Insulators, Ltd.Inventors: Toshio Yamada, Tatsuhiko Hatano
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Patent number: 7488367Abstract: A honeycomb filter includes partition walls forming a plurality of cells extending in one direction, and plugging sections alternately plugging the cells at the ends of the honeycomb filter, the partition walls being formed of a porous base material having a porosity of 45 to 70%. When the average pore size of the base material measured by mercury porosimetry is (A) ?m and the average pore size of the base material measured by a bubble point method is (B) ?m, the average pore size differential rate expressed by “{(A?B)/B}*100” is 35% or less, and the maximum pore size of the base material measured by the bubble point method is 150 ?m or less.Type: GrantFiled: September 21, 2005Date of Patent: February 10, 2009Assignee: NGK Insulators, Ltd.Inventors: Yoshiyuki Kasai, Toshihiro Hirakawa
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Patent number: 7485170Abstract: Disclosed are ceramic honeycomb articles, which are composed predominately of a crystalline phase cordierite composition. The ceramic honeycomb articles possess a microstructure characterized by a unique combination of relatively high porosity between 42% and 56%, and relatively narrow pore size distribution wherein less than 15% of the total porosity has a pore diameter less than 10 ?m, less than 20% of the total porosity has a pore diameter greater than 30 ?m, and dbreadth?1.50 wherein dbreadth=(d90?d10)/d50. The articles exhibits high thermal durability and high filtration efficiency coupled with low pressure drop across the filter. Such ceramic articles are particularly well suited for filtration applications, such as diesel exhaust filters or DPFs. Also disclosed is a method for manufacturing the ceramic article wherein the pore former is preferably potato starch having a median particle diameter greater than 40 ?m.Type: GrantFiled: November 30, 2005Date of Patent: February 3, 2009Assignee: Corning IncorporatedInventors: Douglas Munroe Beall, Thomas Richard Chapman, Weiguo Miao, Jianguo Wang
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Patent number: 7473288Abstract: This particulate matter reducing apparatus 10 is provided to burn and reduce particulate matter (“PM”) in an exhaust gas 1 of a diesel engine while collecting the PM on each filter 11 at a low collection rate of 50% or less in total. The filter 11 is composed of a wire mesh structure and is formed in a short column shape provided with a central through hole 12. The filter 11 is coaxially housed in an outer cylindrical casing 4 with a gap 14 provided within the casing and is retained by a pair of front and rear shielding plates 17 and 18. The pair of shielding plates 17 and 18 divides the inside of the outer cylindrical casing 4 in front and rear and is provided with one or more air holes 15 and 16 at the outer circumferential section or at the central section.Type: GrantFiled: July 1, 2004Date of Patent: January 6, 2009Assignee: Clean Diesel Technologies, Inc.Inventors: Tetsuro Toyoda, Katsunori Matsuoka
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Patent number: 7470393Abstract: Methods of fabricating cermet materials and methods of utilizing the same such as in filtering particulate and gaseous pollutants from internal combustion engines having intermetallic and ceramic phases. The cermet material may be made from a transition metal aluminide phase and an alumina phase. The mixture may be pressed to form a green compact body and then heated in a nitrogen-containing atmosphere so as to melt aluminum particles and form the cermet. Filler materials may be added to increase the porosity or tailor the catalytic properties of the cermet material. Additionally, the cermet material may be reinforced with fibers or screens. The cermet material may also be formed so as to pass an electrical current therethrough to heat the material during use.Type: GrantFiled: February 25, 2005Date of Patent: December 30, 2008Assignee: Battelle Energy Alliance, LLCInventor: Peter C. Kong
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Patent number: 7470303Abstract: The ceramic filter structure 1 of the present invention comprises plural cells defined by partition walls 2 having a porous structure to form flow passages of fluid, plugged portions being formed at one open end portion of specified cells and another open end portion of the remaining cells to allow partition walls 2 to serve as filtration layers, wherein the ratio (S2/S1) of the actual area (S2) of the portion 10 of all actual area of one surface 7 of a specified region 6 of partition walls 2 which can be viewed from a vertical direction to a plane of projection obtained by vertically projecting the specified region 6 of partition walls 2 on a plane from the one surface 7 side to the area (S1) of the said plane 8 of projection is 5-30. This ceramic filter structure can reduce pressure loss increase at time of collecting particulates.Type: GrantFiled: March 23, 2004Date of Patent: December 30, 2008Assignee: NGK Insulators, Ltd.Inventors: Shuichi Ichikawa, Takashi Mizutani
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Patent number: 7470301Abstract: A device for depolluting a heat engine exhaust gases includes an outer casing (23) delimiting an exhaust gas circulating passageway and a particle filter (20) mounted in the passageway. The casing (23) includes a transverse break (34) along its entire periphery, the break (34) dividing the casing (23) into first and second successive segments (38, 40). The first and second successive segments (38, 40) include two mutually engaged ends. One outer end of the first segment (38) overlaps one inner end of the second section (40) along part of the length of the flow passageway. The outer end of the first segment (38) includes along its periphery at least one weakened region (50) for varying the cross-section of the outer end of the first segment (38). The device is applicable to motor vehicles.Type: GrantFiled: May 7, 2003Date of Patent: December 30, 2008Assignee: Faurecia Systems d'EchappementInventor: Jacques Heydens
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Patent number: 7470302Abstract: There is provided a honeycomb structure 1 including porous partition walls 2 disposed so as to form a plurality of through holes 3a, 3b extending from one end portion to the other end portion in A-axis direction, and containing cordierite as a main component. When porosity is P (%), compressive strength in the A-axis direction is C(MPa), and open frontal area is A (%); a relation of C?(600e ?0.0014AP)+0.5 is satisfied. The honeycomb structure has small pressure loss, is hardly damaged, and has excellent trapping efficiency.Type: GrantFiled: March 4, 2004Date of Patent: December 30, 2008Assignee: NGK Insulators, Ltd.Inventors: Kyoko Suzuki, Keiji Matsumoto, Hiroyuki Suenobu
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Patent number: 7465690Abstract: In one embodiment, a method for making a catalytic element comprises forming a first slurry of a promoter oxide precursor and a refractory inorganic oxide and calcining the first slurry to form a supported promoter. The supported promoter and a noble metal solution are combined to form a second slurry that is calcined to form a catalyst composition. The catalyst composition is applied to a substrate and the substrate is calcined to form the catalytic element. In one embodiment, the catalyzed particulate filter comprises a shell disposed around the catalytic element, wherein the shell has an inlet and an outlet, and a retention member disposed between at least a portion of the shell and the catalytic element.Type: GrantFiled: June 19, 2003Date of Patent: December 16, 2008Assignee: Umicore AG & Co. KgInventor: Jiyang Yan
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Patent number: 7455710Abstract: A honeycomb structure includes honeycomb segments separated by porous partitions and having circulation holes through the honeycomb segments in an axial direction; a spacer positioned between neighboring honeycomb segments of the honeycomb segments; and a bonding layer located between honeycomb segments where the spacers are positioned and bonding the neighboring honeycomb segments. The spacer has Young's modulus in a range of 0.1 to 1.5 GPa. A ratio of area of the spacer to area of the bonding layer between the neighboring honeycomb segments is in a range of 0.2 to 30%.Type: GrantFiled: March 18, 2004Date of Patent: November 25, 2008Assignee: NGK Insulators, Ltd.Inventors: Naoshi Masukawa, Shuichi Ichikawa
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Patent number: 7455709Abstract: An object of the present invention is to provide a honeycomb structural body for use in a filter, which can support a large amount of catalysts, can suppress increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body according to the present invention is a pillar-shaped honeycomb structural body having a structure in which a plurality of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween, wherein lamination members are laminated in the length direction so that the through holes are superposed on one another, and one of ends of each through hole is sealed.Type: GrantFiled: July 15, 2004Date of Patent: November 25, 2008Assignee: Ibiden Co., Ltd.Inventors: Kazushige Ohno, Masafumi Kunieda
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Patent number: 7445656Abstract: The structure comprises at least first and second filter members (15A, 15B) respectively provided with first and second faces (24A, 24B) placed facing each other, and a joint (17) interconnecting said faces and extending between said faces (24A, 24B). The first face (24A) comprises at least one region (33A) of strong adhesion with said joint (17) and at least a region (35A) of weak or no adhesion with the joint (17). These regions (33A, 35A) are located respectively facing a region (35B) of the second face (24B) presenting weak or no adhesion with said joint (17), and a region (35B) of the second face (24B) presenting strong adhesion with said joint (17). The structure is applicable to particle filters for the exhaust gas from an internal combustion engine.Type: GrantFiled: March 29, 2004Date of Patent: November 4, 2008Assignee: Saint-Gobain Centre de Recherches et d'Etudes EuropeenInventors: Sébastien Bardon, Vincent Glaize, Julien Romeyer
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Patent number: 7442218Abstract: The present invention is characterized in that a casing 2 connected to an exhaust system 8, a honeycomb filter 3 placed in the inside of the casing 2, the honeycomb filter having a plurality of cells partitioned by partition walls, and plasma generation electrodes 6 placed being faced each other by sandwiching the honeycomb filter there are included, particulate matter contained in an exhaust gas is collected by the honeycomb filter 3, nitrogen monoxide contained in the exhaust gas is oxidized to nitrogen dioxide by nonthermal plasma generated between a pulse electrode 4 and an earth electrode 5 constituting the plasma generation electrodes 6, combustible materials in the particulate matter collected and deposited on the surface of the partition walls are removed through oxidation by the nitrogen dioxide produced. As a result, the honeycomb filter 3 can be regenerated.Type: GrantFiled: July 29, 2003Date of Patent: October 28, 2008Assignees: NGK Insulators, Ltd., Masaaki Okubo, Toshiaki YamamotoInventors: Masaaki Okubo, Toshiaki Yamamoto, Shinichi Miwa
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Measuring of a Soot Deposition Homogeneity in a Particle Filter and Said Filter Regeneration Control
Publication number: 20080257144Abstract: The invention relates to a method for measuring the uniformity of the deposit of soot in a particulate filter, comprising the steps consisting in measuring, simultaneously or in succession, the respective characteristic quantities of at least two gas streams each having passed through a different longitudinal portion of said filter, and then in comparing the characteristic quantities thus measured. It also relates to a method for controlling the regeneration of a particulate filter, comprising the steps consisting in measuring the uniformity of the soot deposit in said filter and in adjusting the parameters of said regeneration according to the uniformity value obtained.Type: ApplicationFiled: October 26, 2006Publication date: October 23, 2008Applicant: SAINT GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EURInventors: David Pinturaud, Caroline Tardivat, Patrick Jacques Dominique Girot -
Patent number: 7438739Abstract: An improved catalyzed soot filter is comprised of a porous ceramic having, on at least a portion of the porous ceramic, an amorphous catalytic phase comprised of an alkali containing oxide glass having therein Si, Al or combination thereof. The improved catalyzed soot filter may be formed by contacting a porous ceramic such as mullite, silcon carbide or cordierite with an alkali containing compound that is a silicate, aluminate or alumino-siliicate and heating to a temperature sufficient to form an amorphous catalytic phase fused to at least a portion of the porous ceramic.Type: GrantFiled: July 26, 2005Date of Patent: October 21, 2008Assignee: Dow Global Technologies Inc.Inventors: Robin Paul Ziebarth, Robert Thomas Nilsson
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Patent number: 7435288Abstract: The present invention relates to a system for effectively filtering particulate matter from exhaust gas. Exemplary embodiments of the invention provides a system for capturing diesel-powered vehicle particulate matter in exhaust gas, the system including: a detour channel at the interior of the entrance to the diesel particulate filter, an electrode located in front of the detour channel and operable to ionize the particulate matter, and a control unit operable to control operation of the electrode.Type: GrantFiled: December 29, 2006Date of Patent: October 14, 2008Assignee: Hyundai Motor CompanyInventor: Kangsoo Lee
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Patent number: 7431749Abstract: Disclosed is a catalytic filter for removing soot particulates from diesel engine exhaust, which is comprised of monolithic oxidation catalyst upstream of the catalytic filter, which effectively oxidize gaseous pollutants and volatile organic fractions, and a catalyzed wall-flow filter downstream serving to low temperature combustion of soot particulates collected on the filter. Also, the preparation method of the catalytic filter is provided, including the colloidal mixture solution of platinum group metal salts and other metal salts with a water-soluble polymer and a reducing agent, which is then impregnated on a catalyst support, followed by calcining at high temperatures. In the present invention, use of the catalytic filter provides effective means of abating diesel exhaust pollutant emissions, that is, particulate matter (PM) and gaseous pollutants (HC, CO, NOx).Type: GrantFiled: April 14, 2004Date of Patent: October 7, 2008Assignee: SK Energy Co., Ltd.Inventors: Yong-Woo Kim, Joon-Seok Min, Sung-Hyoan Kim, Chang-Q Lee, Wha-Sik Min
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Publication number: 20080190078Abstract: 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.Type: ApplicationFiled: February 12, 2007Publication date: August 14, 2008Inventors: Eugene V. Gonze, Frank Ament, Michael J. Paratore
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Patent number: 7404840Abstract: A method for rigidifying a fiber-based paper substrate for use in the exhaust system of a combustion device. In the method, a green ceramic fiber-based paper substrate is impregnated with an impregnating dispersion. The impregnated substrate is then dried, calcined and fired to form a rigidified substrate that is suitable for use in the exhaust system of a combustion device. This rigidification process is performed at least once and, preferably, two or more times. The green paper substrate comprises two or more sheets of green ceramic fiber-based paper, with at least one creased sheet and another sheet being a laminated together to form a plurality of tubular channels. The rigidified substrate comprises refractory ceramic fibers in the form of a ceramic fiber-based paper and agglomerates of ceramic particles.Type: GrantFiled: July 3, 2002Date of Patent: July 29, 2008Assignee: 3M Innovative Properties CompanyInventors: Thomas E. Wood, Zhongshu Tan
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Patent number: 7396389Abstract: Unless an abnormality exists in piping introducing a pressure from front and rear of DPF 22 into a differential pressure sensor 45, pulsations of pressure propagation through an exhaust passage 21 is offset in a detection value of a pressure difference of the differential pressure sensor 45, and an amplitude of the detection value of the DPF pressure difference resulting from pulsation of the pressure becomes small. If a crack exists in one of the piping 3a and 3b, the influence of a pulsation of the pressure appears in the DPF pressure difference and the amplitude of the detection value of the DPF pressure difference becomes large. The amplitude of the detection value of the DPF pressure difference is compared with the reference value and is detected as being abnormal when it is large, utilizing the phenomenon described above.Type: GrantFiled: February 9, 2005Date of Patent: July 8, 2008Assignee: Denso CorporationInventors: Yasuhiro Kariya, Tsukasa Kuboshima
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Patent number: 7393376Abstract: A ceramic filter assembly that resists cracking. The ceramic filter assembly is formed by integrating a plurality of columnar honeycomb filters made of a porous ceramic sintered material with a ceramic sealing material layer and formed to have a substantially elliptical cross sectional shape. The honeycomb filters includes square columnar honeycomb filters in which the ratio between the lengths of their long sides and short sides is between 1.1 and 3.0. The honeycomb filters are arranged so that the long sides and the short sides are respectively parallel to the major axis and the minor axis of the assembly.Type: GrantFiled: March 17, 2003Date of Patent: July 1, 2008Assignee: Ibiden Co., Ltd.Inventors: Noriyuki Taoka, Yutaka Yoshida
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Patent number: 7393377Abstract: In a honeycomb filter in which a plurality of cells are formed by porous partition walls, and a predetermined cell whose one end portion is plugged, and a remaining cell whose other end portion is plugged are alternately arranged in such a manner as to form checked patterns in the opposite end portions. In a section of the filter, a sectional area of the predetermined cell is different from that of the remaining cell, a value of a ratio of a channel hydraulic diameter of the cell having a large sectional area to that of the cell having a small sectional area is 1.2 or more, at least a sectional shape of the cell having the large sectional area is a quadrangular shape whose portion corresponding to at least one corner portion is circular, and a value of a ratio of minimum thickness of a portion (intersection portion) in which the partition walls cross one another to a thickness of each partition wall 2 is 0.7 or more and less than 1.3.Type: GrantFiled: February 24, 2005Date of Patent: July 1, 2008Assignee: NGK Insulators, Ltd.Inventors: Yoshiyuki Kasai, Tatsuyuki Kuki
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Patent number: 7393386Abstract: An exhaust aftertreatment filter has a pre-stressed layer bonded to the filter body at the outer periphery and compressively axially pre-stressed in an opposite axial direction to separational axial tensile stress to counteract the latter during regenerative heating, to minimize separational fracture and cracking.Type: GrantFiled: May 26, 2005Date of Patent: July 1, 2008Assignee: Fleetguard, Inc.Inventors: Thomas M. Yonushonis, Tao You, Matthew P. Henrichsen, Rentong Wang
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Patent number: 7390338Abstract: Internal combustion engine exhaust filter devices and the like are regenerated by placement in a reclamation or burn-off furnace, raising the temperature to at least about 800° F. to 900° F. and conducting relatively low volumes of low pressure air through the filter media to combust entrapped particulates and other materials residing on the filter media. The reclamation furnace includes an afterburner for combusting materials discharged from the filter devices into the furnace chamber so that complete combustion of materials is accomplished before discharge from the furnace. The flow of combustion air for the filter devices is controlled by manifolding and valving connected to a source and the oxygen content of combustion air may be enhanced by a separate source of oxygen injected into the combustion air flow stream.Type: GrantFiled: January 25, 2005Date of Patent: June 24, 2008Assignee: Pollution Control Products Co.Inventor: Peyton G. Simpson, Jr.
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Patent number: 7387657Abstract: A honeycomb structural body is constituted with a ceramic block comprising a plurality of through-holes arranged in a longitudinal direction and separated from each other through partition walls, either end portions of which through-holes being sealed. The ceramic block constituting the honeycomb structural body is made of a composite material consisting of ceramic particles and crystalline silicon and having an excellent thermal conductivity, so that the honeycomb structural body is excellent in the thermal diffusibility but also excellent in the resistance to thermal shock because the storing of thermal stress is less and no crack is caused even if a temperature distribution is caused at a relatively low temperature or cool-heat cycle is repeated over a long period of time.Type: GrantFiled: October 7, 2003Date of Patent: June 17, 2008Assignee: Ibiden Co., Ltd.Inventors: Masafumi Kunieda, Atsushi Kudo
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Patent number: 7384442Abstract: A ceramic wall-flow filter for filtering particulate matter from gases and methods for manufacturing such wall-flow filters are disclosed. The filter includes an array of porous ceramic walls defining a pattern of end-plugged inlet and outlet cells, and heat absorbing elements disposed within at least some of the outlet cells such that a bulk heat capacity of the outlet cells is greater than a bulk capacity of the inlet cells. The heat absorbing elements increase a bulk heat capacity of the filter without substantially interfering with a flow of gas through the porous ceramic walls by allowing thinner walls. According to the method, during the step of extruding or thereafter, heat absorbing elements are formed within at least some of the outlet cells such that a heat capacity of the outlet cells is greater than the inlet cells.Type: GrantFiled: February 28, 2005Date of Patent: June 10, 2008Assignee: Corning IncorporatedInventors: Pronob Bardhan, Douglas Munroe Beall, Kenneth Richard Miller, John Forrest Wight, Jr.
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Patent number: 7384455Abstract: According to an exemplary embodiment of the present disclosure, a method of detecting matter within a filtering device includes measuring a metric indicative of a first quantity of matter within the filtering device and removing a portion of the matter from the filtering device. The method also includes measuring a metric indicative of a second quantity of matter remaining within the filtering device.Type: GrantFiled: October 31, 2005Date of Patent: June 10, 2008Assignee: Caterpillar Inc.Inventors: Cheryl L. Sellers, Dong Fei, Jill R. Akers, Bappaditya Banerjee, Mark A. Gasper, Daniel S. Nordyke, Richard A. Crandell, Orlando Sellers, II, Christie S. Ragle, Ronald Silver, Julie M. Faas, Paul W. Park, Jeremy Trethewey
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Patent number: 7374600Abstract: A method and system for preventing or minimizing false back pressure faults caused by a new particulate filter in an engine exhaust system. When a new particulate filter is placed in an engine exhaust system, the normal back pressure threshold for the fault detection system is increased by a new filter offset amount. Back pressure faults at the normal level are not recorded for a limited period of engine operation and only records back pressure faults that exceed the normal back pressure threshold by the value of the new filter offset.Type: GrantFiled: January 28, 2005Date of Patent: May 20, 2008Assignee: Detroit Diesel CorporationInventors: Richard M. Avery, Jr., Dennis M. Letang
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Patent number: 7357822Abstract: In order to calculate an estimation of the quantity of accumulated particulates in a filter (32), a first estimation calculation unit (100) that outputs first estimation data (XA) calculated from the filter before and after differential pressure, and a second estimation calculation unit (110) that outputs second estimation data (XB) based on the engine operation status. Of the first and second estimation data (XA, XB), the estimation data having the higher dependability, as viewed from the engine speed at that time, is selected, whether or not to regenerate the filter is determined and with the differential between the first and second estimation (XA, XB) also taken into consideration, when the differential is larger than a prescribed value, even if the engine speed is high, the first estimation data XA is not selected since there is a risk that the dependability of the estimation value is low due to cracking of the accumulated particulates.Type: GrantFiled: August 8, 2003Date of Patent: April 15, 2008Assignee: Bosch Automotive Systems CorporationInventors: Toshihiro Hamahata, Tomonori Watanabe
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Publication number: 20080072756Abstract: The present invention relates to a system for effectively filtering particulate matter from exhaust gas. Exemplary embodiments of the invention provides a system for capturing diesel-powered vehicle particulate matter in exhaust gas, the system including: a detour channel at the interior of the entrance to the diesel particulate filter, an electrode located in front of the detour channel and operable to ionize the particulate matter, and a control unit operable to control operation of the electrode.Type: ApplicationFiled: December 29, 2006Publication date: March 27, 2008Inventor: Kangsoo Lee
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Patent number: 7341614Abstract: The invention provides a filter that has a plurality of through holes and satisfies the expression 2.5×A/B+52.5?C?2.5×A/B+60.2 (A?20, 0<B?20), where A(%) represents the ratio of pores with a pore diameter of 10 ?m or less to the total pore volume in a wall part between the through holes; B(%) represents the ratio of pores with a pore diameter of 30 ?m or more to the total pore volume in the wall part; and C(%) represents the aperture ratio of a plane perpendicular to the through holes.Type: GrantFiled: July 17, 2006Date of Patent: March 11, 2008Assignee: Ibiden Co., LtdInventors: Masayuki Hayashi, Kazutake Ogyu, Akihiro Ohira, Kazushige Ohno
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Patent number: 7332014Abstract: A ceramic structure includes a plurality of porous ceramic members each being warped, each of the plurality of porous ceramic members having a bonding portion and end portions at both ends of each of the plurality of porous ceramic members in a longitudinal direction of each of the plurality of porous ceramic members, and an adhesive provided only on the bonding portion between the plurality of porous ceramic members to connect the plurality of porous ceramic members except for the end portions of the plurality of ceramic members.Type: GrantFiled: November 12, 2004Date of Patent: February 19, 2008Assignee: Ibiden Co., Ltd.Inventors: Masaharu Ono, Koji Takahashi, Takafumi Hoshino, Hideya Kawada
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Patent number: 7332016Abstract: A particulate trap has a housing with an inlet and an outlet. The particulate trap also has a plurality of fluidly isolated filters stacked within the housing, between the inlet and the outlet. The stacked plurality of filters have a stack direction and a transverse direction and the flow of exhaust is directed through the plurality of filters in the transverse direction. The particulate trap further has an actuator with a blocking portion configured for linear movement to selectively block exhaust flow through each of the plurality of filters.Type: GrantFiled: July 30, 2004Date of Patent: February 19, 2008Assignee: Caterpillar Inc.Inventors: Joanna Louise Costura, Matthew E. Williams, Matthew T. Kiser, Cornelius N. Opris, J. Josh Driscoll, Dave Michael Thaler, Robert L. Meyer
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Patent number: 7329300Abstract: A honeycomb structure includes partition walls arranged so as to form a plurality of cells extending to an other-end portion from a one-end portion through an axial direction. There are provided a honeycomb structure including a partition wall having a different height in the axial direction in the one-end portion, and a manufacturing method suitable for the structure. There is provided a honeycomb structure comprising: a plurality of partition walls arranged so as to form a plurality of cells extending through an axial direction; and a plugging portion in an open end portion of a predetermined cell. The honeycomb structure includes convex and concave plugging portions, and intersecting portions of surrounding partition walls of one cell which does not any plugging portion contact one or more cells including the convex plugging portions and one or more cells including the concave plugging portions for each intersecting portion. A manufacturing method suitable for this honeycomb structure is also provided.Type: GrantFiled: April 2, 2004Date of Patent: February 12, 2008Assignee: NGK Insulators LtdInventor: Yukihito Ichikawa