US20150059457A1 - Aftertreatment Module with Sensor Mounting Arrangement - Google Patents

Aftertreatment Module with Sensor Mounting Arrangement Download PDF

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Publication number
US20150059457A1
US20150059457A1 US14/390,951 US201214390951A US2015059457A1 US 20150059457 A1 US20150059457 A1 US 20150059457A1 US 201214390951 A US201214390951 A US 201214390951A US 2015059457 A1 US2015059457 A1 US 2015059457A1
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Prior art keywords
shield
module according
aftertreatment module
conduit
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US14/390,951
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English (en)
Inventor
Naseer A. Niaz
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Perkins Engines Co Ltd
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Perkins Engines Co Ltd
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Assigned to PERKINS ENGINES COMPANY LIMITED reassignment PERKINS ENGINES COMPANY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NIAZ, NASEER A.
Publication of US20150059457A1 publication Critical patent/US20150059457A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/864—Removing carbon monoxide or hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • F01N13/143—Double-walled exhaust pipes or housings with air filling the space between both walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0233—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
    • G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
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    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4313—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor comprising a plurality of stacked ducts having their axes parallel to the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
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    • B01F25/431971—Mounted on the wall
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    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
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    • F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N2470/02—Tubes being perforated
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49345—Catalytic device making

Definitions

  • This disclosure is directed to an aftertreatment module having a sensor mounting arrangement.
  • Engines for example internal combustion engines burning gasoline, diesel, or biofuel, output various harmful substances which must be treated to meet current and future emissions legislation.
  • such substances comprise hydrocarbons (HC), carbon monoxides (CO), mono-nitrogen oxides (NOx), and particulate matter such as carbon (C), a constituent of soot.
  • HC hydrocarbons
  • CO carbon monoxides
  • NOx mono-nitrogen oxides
  • C particulate matter
  • Some of those substances may be reduced by careful control of the operating conditions of the engine, but usually it is necessary to provide an aftertreatment module downstream of the engine to treat at least some of the substances entrained in the exhaust gas.
  • Oxidation devices such as a diesel oxidation catalyst, to reduce or to eliminate hydrocarbons (HC) and/or carbon monoxide (CO).
  • Oxidation devices generally include a catalyst to convert those substances into carbon dioxide and water, which are significantly less harmful.
  • aftertreatment modules may include filtration devices to restrict the particulates present in the exhaust gas from being output to atmosphere.
  • the soot collected in the filtration device must later be removed to maintain the efficiency of the filtration device.
  • the methods by which soot may be removed from the filtration device are well known in the art and may generally be referred to as regeneration, which is carried out at elevated temperatures.
  • engine emissions can be cleaned, meaning that a proportion of the harmful substances which would otherwise be released to atmosphere are instead converted to carbon dioxide (CO 2 ), nitrogen (N 2 ) and water (H 2 O).
  • CO 2 carbon dioxide
  • N 2 nitrogen
  • H 2 O water
  • Aftertreatment modules may be provided with one or more sensors for determining one or more conditions within the flow path in the module, such as temperature or quantity of NOx.
  • Parts of the sensors may need to be thermally isolated from the heat of the exhaust gas and, at the same time, also be protected from environmental and mechanical damage, for example due to water collecting at the mounting point which may freeze during machine shutdown.
  • the sensors must be mounted in a secure, insulated, and sealed manner to ensure that they will not easily detach, overheat, or provide a fluid leakage path. Additionally, it is preferable for the sensors to be mounted to the module in a manner which allows for some misalignment of the various features.
  • an aftertreatment module comprising: a conduit defining a flow path and an aperture into the flow path; a shield arranged at least partway around the conduit and spaced therefrom, the shield including an opening in registration with the aperture; a boss provided on the conduit and having a through-hole in registration with the aperture; a sensor disposed within the boss so as to extend at least partway into the flow path; and a spacer arranged around the boss; and wherein the sensor extends through the opening and the shield further comprises an inner portion for engagement with the spacer.
  • FIG. 1 is a perspective view of an aftertreatment module comprising a sensor mounting arrangement according to the present disclosure
  • FIG. 2 is a part-cutaway view of the aftertreatment module of FIG. 1 ;
  • FIG. 3 shows a sensor mounted in the sensor mounting arrangement of the aftertreatment module of FIGS. 1 and 2 ;
  • FIG. 4 shows two sensors mounted in the sensor mounting arrangement of the aftertreatment module of FIGS. 1 and 2 .
  • FIGS. 1 and 2 illustrates an aftertreatment module 10 for an internal combustion engine.
  • the aftertreatment module 10 may comprise a first conduit 11 , a second conduit 12 , and a third conduit 13 , collectively defining a flow path (not shown).
  • a shield 15 (see FIGS. 2 and 3 ) may be arranged at least partway around at least one of the conduits and spaced therefrom. The shield 15 may function to protect the aftertreatment module 10 from environmental and/or mechanical damage.
  • the first, second and third conduits 11 , 12 , 13 may be elongate, having an axis of elongation, and may have a substantially constant cross-section along the axis of elongation.
  • the first, second and third conduits 11 , 12 , 13 may be substantially cylindrical.
  • the first conduit 11 may comprise a first end 20 providing an inlet to the conduit 11 and a second end 21 providing an outlet to the conduit 11 .
  • the second conduit 12 may comprise a first end 22 providing an outlet to the conduit 20 and a second end 23 providing an inlet to the conduit 12 .
  • the third conduit 13 may comprise a first end 24 providing an inlet to the conduit 13 and a second end (not shown) providing an outlet to the conduit 13 .
  • the support structure 14 may comprise a first support member 30 and an opposing second support member 31 .
  • the conduits 11 , 12 , 13 may extend between the support members 30 , 31 .
  • the first conduit 11 may be coupled to the second conduit 12 via a first end coupling forming a flow hood 32 for fluidly connecting the outlet of the first conduit 11 to the inlet of the second conduit 12 .
  • the flow hood 32 may comprise an injector module 33 .
  • the second conduit 12 may be coupled to the third conduit 13 via a second end coupling (not shown) for fluidly connecting the outlet of the second conduit 12 to the inlet of the third conduit 13 .
  • the support structure 14 may further comprise a first brace 34 and a second brace 35 .
  • Each of the first and second braces 34 , 35 may comprise a longitudinal beam possibly having a generally L-shaped cross section. At least one of the braces may include a cut-out arranged partway between its ends so as to define two mutually perpendicular and unconnected portions.
  • Each brace 34 , 35 therefore may comprise a rectangular plate with an aperture 36 at the centre, each rectangular plate having a substantially 90° fold in a direction parallel to a longitudinal axis of the beam 34 , 35 such that the fold intersects the aperture 36 .
  • the first and second support members 30 , 31 and the first and second braces 34 , 35 may together form a rigid rectangular structure (not shown) which may serve a purpose of holding the three conduits 11 , 12 , 13 relative to one another whilst accommodating differential expansion and/or contraction of components relative to each other.
  • DOC diesel oxidation catalyst
  • DPF diesel particulate filter
  • injector module 33 an injector module 33
  • mixer module not shown
  • SCR selective catalyst reduction
  • AMOX ammonia oxidation catalyst
  • the DOC module may be located in a first portion of the first conduit 11 towards the first inlet end 20 of the first conduit 11 .
  • the DPF module may be located in a second portion of the first conduit 11 towards the second outlet end 21 of the first conduit 11 .
  • the flow hood 32 may provide a fluid flow path from the second end 21 of the first conduit 11 to the second end 23 of the second conduit 12 .
  • the flow hood 32 may comprise the injector module 33 .
  • the mixer module (not shown) may be located in the second conduit 12 .
  • the mixer module may be configured to mix a fluid injected by the injector module 33 with a fluid arriving from the first conduit 11 .
  • the mixer module may comprise multiple features, such as interspersed fins, which may give rise to an even blend of the injected fluid with the fluid from the first conduit 11 .
  • the second end coupling (not shown) may provide a fluid flow path from the first end 22 of the second conduit 12 to the first end 24 of the third conduit 13 .
  • the SCR module (not shown) may be located in a first portion of the third conduit 13 , and possibly towards the first end 24 of the third conduit 13 .
  • the SCR module may comprise a catalyst surface intended to catalyse a reaction to occur between the two fluids mixed in the mixer module and output by the diffuser.
  • the AMOX module (not shown) may both be located in a second portion of the third conduit 13 , and possibly towards the second end (not shown) of the third conduit 13 .
  • the AMOX module may comprise a catalyst which may catalyse a reaction of one or more of the products output from the SCR module.
  • the aftertreatment module 10 may comprise one or more sensors for sensing one or more conditions in the aftertreatment module 10 , such as temperature or quantity of NOx.
  • sensors may need to be thermally isolated from the heat of the exhaust gas and, at the same time, also be protected from environmental and mechanical damage. For example, this may be due to water collecting at the mounting point and potentially freezing during machine shutdown.
  • the sensors must be mounted in a secure, insulated, and sealed manner to ensure that they will not easily detach, overheat, or provide a fluid leakage path. Additionally, the sensors must be mounted to the module in a manner which allows for some misalignment of the various features.
  • One sensor 50 may be mounted in an aperture 53 in the wall of a conduit 11 , 12 , 13 .
  • the mounting is such that the sensor 50 , 51 , 52 may penetrate the conduit 11 , 12 , 13 , whilst those elements of the sensor which need not be located within a volume to be sensed (i.e. electronic components) may be located on an exterior surface 17 of the conduit 11 , 12 , 13 . In this manner, sensitive elements of the sensor 50 , 51 , 52 can be located away from high temperatures likely to occur inside the conduit.
  • a boss 54 may be provided on the conduit 11 , 12 , 13 , the boss 54 having a through-hole 55 arranged substantially in registration with the aperture 53 .
  • the boss 54 may be welded to the conduit 11 , 12 , 13 , may be secured to the conduit 11 , 12 , 13 by any other suitable means, or may be formed as an integral part of the conduit 11 , 12 , 13 .
  • the sensor 50 , 51 , 52 may be disposed within the boss 54 so as to extend partway into the flow path.
  • a spacer 56 may be arranged around the boss 54 .
  • the spacer 56 may be formed of a dense wire mesh, which may be compressible.
  • the spacer 56 may be formed of an insulating material, or any other suitable material.
  • the spacer 56 may be cylindrical or of any other suitable shape or structure.
  • the shield 15 may include an opening 57 in registration with the aperture 53 , to accommodate the sensor 50 , 51 , 52 .
  • a cap 58 may be provided to at least partially seal the opening 57 in the shield 15 .
  • the cap 58 may have an aperture 59 through which the sensor 50 , 51 , 52 may extend, an inner portion 60 for engagement with the spacer 56 , and an outer portion 61 for engagement with the shield 15 .
  • the cap 58 may be welded to the shield 15 .
  • the cap 58 may have an exterior profile which defines a recess 62 in the shield 15 .
  • the recess 62 may form an indentation that may allow for improved cooling of the sensor 50 , 51 , 52 .
  • the recess 62 may be cup-shaped.
  • the exterior profile and orientation of the recess 62 may be such that any fluid which falls into the recess 62 will tend to move out of the recess 62 as a consequence of gravity. This might be achieved by the profile of the recess 62 being monotonically decreasing towards a lowest point, when the conduit 11 , 12 , 13 is in an upright position.
  • monotonically decreasing it may be meant that the recess 62 includes no local low points but rather that the recess 62 comprises a single high point from which, and a single low point towards which, fluid may flow under gravity.
  • the shield 15 may mate directly with the spacer 56 , which would reduce the need for a separate cap 58 .
  • the shield 15 may be profiled in a similar manner to the cap 58 as described above.
  • a similar mounting arrangement using a spacer 56 may be used for the mounting of the injector unit 33 with respect to the flow hood 32 (acting as a conduit 11 , 12 , 13 ) and the shield 15 .
  • a similar mounting arrangement using a spacer 56 may additionally be used for any other device which may need to be in communication with the flow path.
  • the boss 54 , shield, 15 , and cap 58 may all be made of stainless steel.
  • the aftertreatment module 10 having the above described sensor mounting arrangement has industrial applicability in the field of internal combustion engines, and particularly in the field of diesel internal combustion engines.
  • the aftertreatment module When the aftertreatment module is in use, air between the conduits 11 , 12 , 13 and the shield 15 may become heated by the exhaust gases in the aftertreatment module 10 , causing it to expand and vent out of any gaps in the shield 15 .
  • Hot air jetting out onto the components of the sensors 50 , 51 , 52 which are external to the conduits 11 , 12 , 13 may cause damage to the sensors 50 , 51 , 52 .
  • the spacer 56 may act as at least a partial seal to prevent or minimise hot air located within the space between the conduits 11 , 12 , 13 and the shield 15 from jetting out through the cap 58 in the vicinity of the sensors 50 , 51 , 52 between the boss 54 and the cap 58 , thereby avoiding damage to the sensors 50 , 51 , 52 .
  • the compressibility of the spacer 56 may allow it to take up tolerance compensation between the boss 54 , the shield 15 , and the cap 58 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Acoustics & Sound (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Cleaning In General (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
US14/390,951 2012-04-24 2012-07-27 Aftertreatment Module with Sensor Mounting Arrangement Abandoned US20150059457A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB201207201A GB201207201D0 (en) 2012-04-24 2012-04-24 Emissions cleaning module for a diesel engine
GB1207201.3 2012-04-24
PCT/GB2012/051840 WO2013160634A1 (en) 2012-04-24 2012-07-27 Aftertreatment module with sensor mounting arrangement

Publications (1)

Publication Number Publication Date
US20150059457A1 true US20150059457A1 (en) 2015-03-05

Family

ID=46261811

Family Applications (10)

Application Number Title Priority Date Filing Date
US14/390,951 Abandoned US20150059457A1 (en) 2012-04-24 2012-07-27 Aftertreatment Module with Sensor Mounting Arrangement
US14/391,316 Abandoned US20150167520A1 (en) 2012-04-24 2012-07-27 Inlet Module for an Emissions Cleaning Module
US14/391,325 Abandoned US20150068400A1 (en) 2012-04-24 2012-12-07 Emissions Cleaning Module and a Method of Cleaning a Particulate Filter
US14/391,599 Active US9702288B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/394,227 Active 2033-04-07 US9528411B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/391,136 Active US9341099B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/394,618 Active 2033-03-17 US9494067B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module and associated electronics support unit
US14/395,012 Active 2033-01-22 US9638079B2 (en) 2012-04-24 2013-02-14 Exhaust mixer, emissions cleaning module and method
US14/395,332 Abandoned US20150061286A1 (en) 2012-04-24 2013-04-08 Outlet Module for an Emissions Cleaning Module
US14/391,138 Active 2033-09-14 US9617887B2 (en) 2012-04-24 2013-04-10 Emissions cleaning module for an engine

Family Applications After (9)

Application Number Title Priority Date Filing Date
US14/391,316 Abandoned US20150167520A1 (en) 2012-04-24 2012-07-27 Inlet Module for an Emissions Cleaning Module
US14/391,325 Abandoned US20150068400A1 (en) 2012-04-24 2012-12-07 Emissions Cleaning Module and a Method of Cleaning a Particulate Filter
US14/391,599 Active US9702288B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/394,227 Active 2033-04-07 US9528411B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/391,136 Active US9341099B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module
US14/394,618 Active 2033-03-17 US9494067B2 (en) 2012-04-24 2012-12-07 Emissions cleaning module and associated electronics support unit
US14/395,012 Active 2033-01-22 US9638079B2 (en) 2012-04-24 2013-02-14 Exhaust mixer, emissions cleaning module and method
US14/395,332 Abandoned US20150061286A1 (en) 2012-04-24 2013-04-08 Outlet Module for an Emissions Cleaning Module
US14/391,138 Active 2033-09-14 US9617887B2 (en) 2012-04-24 2013-04-10 Emissions cleaning module for an engine

Country Status (5)

Country Link
US (10) US20150059457A1 (zh)
EP (10) EP2841726A1 (zh)
CN (10) CN104379893A (zh)
GB (1) GB201207201D0 (zh)
WO (10) WO2013160633A1 (zh)

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