# US 8,784,742 B2 · Exhaust aftertreatment device with integrated shell and baffle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,742 B2 - Document ID: US8784742B2 - Status: Granted - Kind: B2 - Application number: 14/075,095 - Filed: 2013-11-08 - Published: 2014-03-06 - Granted: 2014-07-22 - Earliest claimed: 2011-03-04 - Assignees: Tenneco Automotive Operating Company Inc. - Applicants: Tenneco Automotive Operating Company Inc. - Inventors: Megan Wikaryasz; Douglas Otrompke - Web page: https://patentgrep.com/patent/US8784742B2 ## CPC - B01D 53/94: by catalytic processes - F01N 3/0211: {Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration} - F01N 3/035: with catalytic reactors - F01N 3/103: {Oxidation catalysts for HC and CO only} - F01N 3/2821: {the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence} - F01N 3/2842: {specially adapted for monolithic supports, e.g. of honeycomb type (F01N3/2853 - F01N3/2871 take precedence)} - F01N 3/2853: {using mats or gaskets between catalyst body and housing} - F01N 3/2864: {the mats or gaskets comprising two or more insulation layers} - F01N 3/2892: {Exhaust flow directors or the like, e.g. upstream of catalytic device} - F01N 13/0097: {the purifying devices are arranged in a single housing} - F01N 13/141: {Double-walled exhaust pipes or housings} - B01D 53/9477: {with catalysts positioned on separate bricks, e.g. exhaust systems} - F01N 2240/20: a flow director or deflector - F01N 2470/10: Tubes having non-circular cross section - F01N 2470/18: the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus - F01N 2470/20: Dimensional characteristics of tubes, e.g. length, diameter - 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) ## Abstract An exhaust treatment device includes an inner shell, an outer shell and insulation material positioned between the inner shell and the outer shell. An inlet tube has an end in communication with a cavity defined by the inner shell. A substrate for treating engine exhaust is positioned within the inner shell. A baffle plate includes a plurality of apertures positioned such that the exhaust passes through the apertures prior to entering the substrate. The baffle plate supports an end of the inner shell and the inlet tube. ## Claims ### Claim 1 An exhaust treatment device, comprising: an inner shell; an outer shell; an insulation material positioned between the inner shell and the outer shell; an inlet tube having an end in communication with a cavity defined by the inner shell; a substrate for treating engine exhaust positioned within the inner shell; and a baffle plate including a plurality of apertures positioned such that the exhaust passes through the apertures prior to entering the substrate, the baffle plate supporting an end of the inner shell and the inlet tube, the baffle plate including a circumferentially extending flange engaging the inlet tube, the baffle plate further including a recess in receipt of the end of the inner shell. ### Claim 2 (depends on 1) The exhaust treatment device of claim 1, further including an inlet plate including a first aperture in receipt of the inlet tube and a second aperture in receipt of the outer shell. ### Claim 3 (depends on 2) The exhaust treatment device of claim 2, wherein the inlet tube is press-fit to the baffle plate. ### Claim 4 (depends on 3) The exhaust treatment device of claim 3, wherein the baffle plate and the inlet plate extend substantially parallel and spaced apart from one another. ### Claim 5 (depends on 4) The exhaust treatment device of claim 4, further including an insulation material positioned between the baffle plate and the inlet plate. ### Claim 6 (depends on 5) The exhaust treatment device of claim 5, further including a compressible mat positioned between an outer surface of the substrate and an inner surface of the inner shell. ### Claim 7 (depends on 1) The exhaust treatment device of claim 1, wherein an axis of exhaust flow defined by the inlet tube extends substantially parallel to an axis of exhaust flowing through the substrate, the axes being offset a distance substantially less than or equal to the sum of a radius of the outer shell and an inner diameter of the inlet tube. ### Claim 8 An exhaust treatment device, comprising: an inner shell; an outer shell; an insulation material positioned between the inner shell and the outer shell; an inlet tube having an end in communication with a cavity defined by the inner shell: a substrate for treating engine exhaust positioned within the inner shell; and a baffle plate including a plurality of apertures positioned such that the exhaust passes through the apertures prior to entering the substrate, the baffle plate supporting an end of the inner shell and the inlet tube, the baffle plate including a circumferentially extending flange engaging the inlet tube, wherein the baffle plate includes a tubular wall portion surrounding an outer surface of the inner shell and a substantially planar portion through which the plurality of apertures extend, wherein the substrate includes a substantially planar upstream end face extending parallel to the planar portion of the baffle plate. ### Claim 9 An exhaust treatment device, comprising: an outer shell including an outer tubular body coupled to an outer hood; an inner shell including an inner tubular body coupled to an inner hood; an insulation material sandwiched between the inner shell and the outer shell; an inlet tube having an end in communication with a cavity defined by the inner shell; a substrate positioned within the inner shell for treating engine exhaust; an inlet plate fixed to the inlet tube and the outer tubular body; and a baffle plate extending substantially parallel to the inlet plate, being fixed to a terminal end of the inner tubular body and supporting an end of the inlet tube, the baffle plate including a plurality of apertures positioned such that the exhaust flowing through the inlet tube turns 180 degrees to pass through the apertures prior to entering the substrate. ### Claim 10 (depends on 9) The exhaust treatment device of claim 9, wherein the baffle plate includes a recess in receipt of an end of the inner shell. ### Claim 11 (depends on 10) The exhaust treatment device of claim 10, wherein the baffle plate includes a circumferentially extending flange engaging the inlet tube. ### Claim 12 (depends on 11) The exhaust treatment device of claim 11, wherein the inlet tube is press-fit to the baffle plate. ### Claim 13 (depends on 12) The exhaust treatment device of claim 12, further including an insulation material positioned between the baffle plate and the inlet plate. ### Claim 14 (depends on 9) The exhaust treatment device of claim 9, further including another substrate positioned within the inner shell downstream of the substrate. ### Claim 15 (depends on 14) The exhaust treatment device of claim 14, wherein all of the exhaust flowing through the inlet tube passes through both substrates. ### Claim 16 (depends on 9) The exhaust treatment device of claim 9, wherein the outer hood includes a plurality of inward projections fixed to a plurality of outward projections on the inner hood, a majority of the inner hood extending substantially parallel to the baffle plate. ### Claim 17 (depends on 9) The exhaust treatment device of claim 9, wherein the baffle plate includes a tubular wall portion surrounding the inner shell and a substantially planar portion through which the plurality of apertures extend, wherein the substrate includes a substantially planar upstream end face extending parallel to the planar portion of the baffle plate. ### Claim 18 An exhaust treatment device, comprising: an inner shell; an outer shell; an insulation material positioned between the inner shell and the outer shell; an inlet tube having an end in communication with a cavity defined by the inner shell; a substrate for treating engine exhaust positioned within the inner shell; a mat compressed between the substrate and the inner shell to retain the substrate at a desired position within the exhaust treatment device; and a baffle including a planar panel and an axially protruding boss, the boss including a cylindrical wall intersecting the planar panel and an end face extending parallel to the planar panel, the end face including a plurality of apertures positioned such that the exhaust passes through the apertures prior to entering the substrate, the baffle further including a cylindrical flange circumscribing an opening, the flange supporting an end of the inlet tube, the cylindrical wall of the boss supporting an end of the inner shell. ### Claim 19 (depends on 18) The exhaust treatment device of claim 18, wherein the baffle includes a substantially constant cross-sectional thickness. ### Claim 20 (depends on 19) The exhaust treatment device of claim 19, wherein the cylindrical wall and the cylindrical flange extend in the same direction from the planar panel.