# US 8,539,767 B2 · Exhaust treatment system for an internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,767 B2 - Document ID: US8539767B2 - Status: Granted - Kind: B2 - Application number: 13/182,054 - Filed: 2011-07-13 - Published: 2012-09-20 - Granted: 2013-09-24 - Earliest claimed: 2011-03-16 - Assignees: GM Global Technology Operations LLC - Applicants: Kimberly O'Kane; Chijou Wang; Gary Clark, II - Inventors: Kimberly O'Kane; Chijou Wang; Gary Clark, II - Web page: https://patentgrep.com/patent/US8539767B2 ## CPC - F01N 13/1805: {Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K)} - F01N 3/2892: {Exhaust flow directors or the like, e.g. upstream of catalytic device} - F01N 2240/20: a flow director or deflector - F02B 37/00: Engines characterised by provision of pumps driven at least for part of the time by exhaust - 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 An exhaust system comprises an exhaust driven turbocharger having an outlet and a flanged portion that extends about the outlet, an exhaust treatment device comprising a canister having an inlet cone that includes an integral inlet flange defining an the inlet opening configured to define a seal with the flanged portion that extends about the outlet of the turbocharger and a substrate disposed within the canister through which the exhaust gas flows. An exhaust gas passage, fluidly couples the turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween and a flow modifier comprising a radially inwardly extending wall portion extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage to evenly distribute the exhaust gas across the an inlet face of the substrate. ## Claims ### Claim 1 An exhaust system configured to receive exhaust gas from an internal combustion engine comprising: an exhaust driven turbocharger having an outlet and a flanged portion that extends about the outlet; an exhaust treatment device comprising a rigid canister having an inlet cone that includes an integral inlet flange defining an inlet opening of the exhaust treatment device and configured to define a seal with the flanged portion that extends about the outlet of the exhaust driven turbocharger; a substrate disposed within the rigid canister through which the exhaust gas flows; an exhaust gas passage, defined by the turbocharger outlet and the inlet opening of the exhaust treatment device, that fluidly couples the exhaust driven turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween; and a flow modifier comprising a radially inwardly extending wall portion that extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage as exhaust gas enters the inlet cone of the exhaust treatment device to evenly distribute the exhaust gas across the an inlet face of the substrate. ### Claim 2 (depends on 1) The exhaust system of claim 1, wherein the radially inwardly extending wall portion of the flow modifier is segmented to direct a portion of the exhaust gas towards the outer radius of the exhaust gas passage. ### Claim 3 (depends on 1) The exhaust system of claim 1, wherein the flow modifier is constructed integrally with the inlet flange of the inlet cone. ### Claim 4 (depends on 1) The exhaust system of claim 1, wherein the flow modifier is constructed integrally with the flanged portion of the turbocharger outlet. ### Claim 5 (depends on 1) The exhaust system of claim 1, further comprising a second flow modifier that is positioned axially downstream, with respect to the exhaust gas flow direction, of the radially inwardly extending wall portion of the flow modifier and further redirects the outwardly migrating exhaust gas flow away from the outer circumference of the exhaust gas passage and into a more evenly distributed flow path as the exhaust gas enters the inlet cone of the exhaust treatment device. ### Claim 6 (depends on 5) The exhaust system of claim 5, wherein the second flow modifier comprises a radially inwardly extending wing. ### Claim 7 An internal combustion engine having an exhaust system configured to receive exhaust gas therefrom comprising: an exhaust driven turbocharger, in fluid communication with the exhaust system, for receipt of exhaust gas from the internal combustion engine, and having an outlet and a flanged portion that extends about the outlet; an exhaust treatment device comprising a rigid canister having an inlet cone that includes an integral inlet flange defining an inlet opening of the exhaust treatment device and configured to define a seal with the flanged portion that extends about the outlet of the exhaust driven turbocharger for receipt of exhaust gas therefrom; a catalyst coated substrate disposed within the rigid canister through which the exhaust gas flows; an exhaust gas passage, defined by the turbocharger outlet and the inlet opening of the exhaust treatment device, that fluidly couples the exhaust driven turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween; and a flow modifier comprising a radially inwardly extending wall portion that extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage as exhaust gas enters the inlet cone of the exhaust treatment device to evenly distribute the exhaust gas across the an inlet face of the catalyst coated substrate. ### Claim 8 (depends on 7) The internal combustion engine of claim 7, wherein the radially inwardly extending wall portion of the flow modifier is segmented to direct a portion of the exhaust gas towards the outer radius of the exhaust gas passage. ### Claim 9 (depends on 7) The internal combustion engine of claim 7, wherein the flow modifier is constructed integrally with the inlet flange of the inlet cone. ### Claim 10 (depends on 7) The internal combustion engine of claim 7, wherein the flow modifier is constructed integrally with the flanged portion of the turbocharger outlet. ### Claim 11 (depends on 7) The internal combustion engine of claim 7, further comprises a second flow modifier that is positioned axially downstream, with respect to the exhaust gas flow direction, of the radially inwardly extending wall portion of the flow modifier and further redirects the outwardly migrating exhaust gas flow away from the outer circumference of the exhaust gas passage and into a more evenly distributed flow path as the exhaust gas enters the inlet cone of the exhaust treatment device. ### Claim 12 (depends on 11) The internal combustion engine of claim 11, wherein the second flow modifier comprises a radially inwardly extending wing.