# US 8,771,392 B2 · Device for particle separation in an exhaust-gas recirculation system and motor vehicle having the device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,392 B2 - Document ID: US8771392B2 - Status: Granted - Kind: B2 - Application number: 13/729,927 - Filed: 2012-12-28 - Published: 2013-05-09 - Granted: 2014-07-08 - Earliest claimed: 2010-06-28 - Assignees: EMITEC Gesellschaft fuer Emissionstechnologie mbH - Applicants: EMITEC Gesellschaft für Emissionstechnologie mbH - Inventors: Carsten Kruse; Thomas Nagel; Ferdi Kurth - Web page: https://patentgrep.com/patent/US8771392B2 ## CPC - F02M 35/024: using filters, e.g. moistened (F02M35/026 takes precedence; cleaning of the filtering material F02M35/08) - B01D 39/12: of wire gauze; of knitted wire; of expanded metal - B01D 46/0004: {Details of removable closures, lids, caps or filter heads} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - F01N 3/021: by means of filters - F01N 3/022: characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous - F01N 3/023: using means for regenerating the filters, e.g. by burning trapped particles - F01N 3/035: with catalytic reactors - F01N 3/2835: {fibrous} - F01N 13/02: having two or more separate silencers in series - F02M 26/15: in relation to engine exhaust purifying apparatus - F02M 35/04: specially arranged with respect to engine {, to intake system or specially adapted to vehicle}; Mounting thereon {; Combinations with other devices (combined with silencers F02M35/14)} - B01D 53/944: {Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts (three-way-catalysts [TWC] B01D53/9445)} - B01D 2255/915: Catalyst supported on particulate filters - B01D 2279/30: for treatment of exhaust gases from IC Engines - F02B 37/00: Engines characterised by provision of pumps driven at least for part of the time by exhaust - F02M 26/05: High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) ## Abstract A device for separating particles from an exhaust gas of an internal combustion engine includes at least a pot with a base having a multiplicity of openings, at least one nonwoven layer positioned on the base of the pot, and a cover. The at least one nonwoven layer is positioned between the base and the cover. A motor vehicle having the device is also provided. ## Claims ### Claim 1 An exhaust system, comprising: an exhaust gas recirculation line configured to recirculate an exhaust gas of an internal combustion engine; a device disposed in said recirculation line and configured to separate particles from the exhaust gas; said device including a pot having a base with a multiplicity of openings formed therein, a cover, and at least one nonwoven layer disposed at said base and positioned between said base and said cover. ### Claim 2 (depends on 1) The exhaust system according to claim 1, wherein said cover is wrapped around an outside of said pot. ### Claim 3 (depends on 1) The exhaust system according to claim 1, wherein at least one of said base or said cover has a curved shape. ### Claim 4 (depends on 1) The exhaust system according to claim 1, wherein said at least one nonwoven layer is catalytically coated. ### Claim 5 (depends on 1) The exhaust system according to claim 1, wherein said at least one nonwoven layer is in the form of a fabric. ### Claim 6 (depends on 1) The exhaust system according to claim 1, wherein said base has at least one central first zone and a second zone surrounding said at least one central first zone, and said first and second zones have differently configured openings. ### Claim 7 A motor vehicle, comprising: an exhaust-gas recirculation system equipped with a device for separating particles from an exhaust gas of an internal combustion engine; said device including a pot having a base with a multiplicity of openings formed therein, a cover, and at least one nonwoven layer disposed at said base and positioned between said base and said cover. ### Claim 8 (depends on 7) The motor vehicle according to claim 7, wherein said cover is wrapped around an outside of said pot. ### Claim 9 (depends on 7) The motor vehicle according to claim 7, wherein at least one of said base or said cover has a curved shape. ### Claim 10 (depends on 7) The motor vehicle according to claim 7, wherein said at least one nonwoven layer is catalytically coated. ### Claim 11 (depends on 7) The motor vehicle according to claim 7, wherein said at least one nonwoven layer is in the form of a fabric. ### Claim 12 (depends on 7) The motor vehicle according to claim 7, wherein said base has at least one central first zone and a second zone surrounding said at least one central first zone, and said first and second zones have differently configured openings. ### Claim 13 (depends on 1) The exhaust system according to claim 1, wherein the exhaust system is configured to withstand temperatures up to approximately 800° C. ### Claim 14 A method for operating an exhaust system, the method comprising the following steps: providing an exhaust gas recirculation line; providing a device in the recirculation line, the device including a pot having a base with a multiplicity of openings formed therein, a cover, and at least one nonwoven layer disposed at the base and positioned between the base and the cover; recirculating an exhaust gas of an internal combustion engine through the exhaust gas recirculation line; and separating particles from the exhaust gas in the device. ### Claim 15 (depends on 14) The method according to claim 14, which further comprises catalytically coating the at least one nonwoven layer. ### Claim 16 (depends on 15) The method according to claim 15, wherein the at least one nonwoven layer is in the form of a fabric.