# US 8,464,516 B2 · Inlet for exhaust treatment device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,516 B2 - Document ID: US8464516B2 - Status: Granted - Kind: B2 - Application number: 12/948,974 - Filed: 2010-11-18 - Published: 2012-05-24 - Granted: 2013-06-18 - Earliest claimed: 2010-11-18 - Assignees: Tenneco Automotive Operating Company Inc. - Applicants: Charles Bell; Megan Wikaryasz; Douglas Otrompke - Inventors: Charles Bell; Megan Wikaryasz; Douglas Otrompke - Web page: https://patentgrep.com/patent/US8464516B2 ## CPC - F01N 3/025: using fuel burner or by adding fuel to exhaust - F01N 3/36: Arrangements for supply of additional fuel - F01N 13/009: {having two or more separate purifying devices arranged in series} - F01N 13/08: Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} - F01N 13/1888: {the housing of the assembly consisting of two or more parts, e.g. two half-shells} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 2240/14: a fuel burner - F01N 2470/30: Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow - 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 gas treatment device includes an inlet housing having an inlet opening for receipt of an exhaust flow from an engine aligned along a first axis. A main housing includes a cylindrical body portion defining a treatment zone and an exhaust outlet aligned along a second axis extending parallel to the first axis. The inlet housing is in fluid communication with and fixed to an outer surface of the main housing. The inlet housing includes a contoured wall including an end portion positioned opposite the inlet opening, an aperture extending through the wall transverse to the first axis, divergent side wall portions on opposite sides of the inlet opening, and a necked portion having a reduced cross-section positioned downstream of the inlet opening and upstream of the aperture. A component is coupled to the main housing for treating exhaust flowing through the treatment zone. ## Claims ### Claim 1 An exhaust gas treatment device for treating an exhaust flow from an engine, the exhaust gas treatment device comprising: an inlet housing having an inlet opening for receipt of the exhaust flow from the engine, the inlet opening being aligned along a first axis; a main housing including a cylindrical body portion defining a treatment zone and an exhaust outlet aligned along a second axis extending parallel to the first axis, the inlet housing being in fluid communication with and fixed to an outer surface of the main housing, the inlet housing including a contoured wall including an end portion positioned opposite the inlet opening, an aperture extending through the wall transverse to the first axis, divergent side wall portions on opposite sides of the inlet opening, and a necked portion having a reduced cross-section positioned downstream of the inlet opening and upstream of the aperture; and a component coupled to the main housing for treating exhaust flowing through the treatment zone. ### Claim 2 (depends on 1) The exhaust gas treatment device of claim 1 wherein the inlet housing includes first and second stamped steel shells fixed to one another along a peripheral seam. ### Claim 3 (depends on 1) The exhaust gas treatment device of claim 1 wherein the aperture includes an elongated shape. ### Claim 4 (depends on 3) The exhaust gas treatment device of claim 3 wherein the component includes an injector to inject fuel into the treatment zone. ### Claim 5 (depends on 4) The exhaust gas treatment device of claim 4 further including an igniter to combust the fuel in the treatment zone. ### Claim 6 (depends on 5) The exhaust gas treatment device of claim 5 wherein the main housing includes an inlet header fixed to the cylindrical body portion to close one end of the main housing, the injector being mounted to the inlet header to inject fuel along the second axis. ### Claim 7 (depends on 6) The exhaust gas treatment device of claim 6 wherein a portion of the contoured wall opposite the aperture includes a radially outwardly sloping portion intersecting a radially inwardly sloping portion at an inflection point, the inflection point being positioned axially downstream from the inlet opening and upstream from an upstream edge of the aperture to redirect the exhaust flow through the aperture. ### Claim 8 (depends on 7) The exhaust gas treatment device of claim 7 wherein the inflection point is spaced from the upstream edge of the aperture a distance ranging from 15 to 55 percent of a minor axis dimension of the aperture. ### Claim 9 (depends on 8) The exhaust gas treatment device of claim 8 further including another igniter coupled to the main housing and positioned downstream of the igniter to combust unburned fuel in the exhaust flowing through the inlet housing. ### Claim 10 An exhaust gas treatment device for treating an exhaust flow from an engine, the exhaust gas treatment device comprising: an inlet housing having an inlet opening for receipt of the exhaust flow from the engine, the inlet opening being aligned along a first axis; a main housing including a cylindrical body portion defining a treatment zone and an exhaust outlet aligned along a second axis extending parallel to the first axis, the inlet housing being in fluid communication with and fixed to an outer surface of the main housing, the inlet housing including a contoured wall including an end portion positioned opposite the inlet opening and an aperture extending through the wall transverse to the first axis, wherein a portion of the contoured wall opposite the aperture includes a radially outwardly sloping portion intersecting a radially inwardly sloping portion at an inflection point, the inflection point being positioned axially downstream from the inlet opening and upstream from an upstream edge of the aperture to redirect the exhaust flow through the aperture; and a component coupled to the main housing for treating exhaust flowing through the treatment zone. ### Claim 11 (depends on 10) The exhaust gas treatment device of claim 10 wherein the inflection point is spaced from the upstream edge of the aperture a distance ranging from 15 to 55 percent of a minor axis dimension of the aperture. ### Claim 12 (depends on 10) The exhaust gas treatment device of claim 10 further including a mixer plate fixed to the body portion for mixing the gases exiting the exhaust treatment device. ### Claim 13 (depends on 10) The exhaust gas treatment device of claim 10 wherein the component includes an injector to inject fuel into the treatment zone. ### Claim 14 (depends on 13) The exhaust gas treatment device of claim 13 further including an igniter to combust the fuel in the treatment zone. ### Claim 15 (depends on 14) The exhaust gas treatment device of claim 14 wherein the main housing includes an inlet header fixed to the cylindrical body portion to close one end of the main housing, the injector being mounted to the inlet header to inject fuel along the second axis. ### Claim 16 (depends on 15) The exhaust gas treatment device of claim 15 wherein the aperture includes an elongated shape. ### Claim 17 (depends on 16) The exhaust gas treatment device of claim 16 further including another igniter coupled to the main housing and positioned downstream of the igniter to combust unburned fuel in the exhaust flowing through the inlet housing. ### Claim 18 (depends on 13) The exhaust gas treatment system of claim 13 further including a conduit positioned within the main housing, the injector injecting fuel within the conduit, the exhaust passing through the inlet housing being split into a combustion portion that passes through apertures extending through the conduit and a bypass portion flowing between the main housing and the conduit.