US20160047285A1 - Engine Exhaust After-Treatment System - Google Patents

Engine Exhaust After-Treatment System Download PDF

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Publication number
US20160047285A1
US20160047285A1 US14/782,874 US201314782874A US2016047285A1 US 20160047285 A1 US20160047285 A1 US 20160047285A1 US 201314782874 A US201314782874 A US 201314782874A US 2016047285 A1 US2016047285 A1 US 2016047285A1
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United States
Prior art keywords
exhaust
canister
exhaust treatment
baffles
housing
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Abandoned
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US14/782,874
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English (en)
Inventor
William V. Alcini
Michael Golin
Lin Wang
Weiliang XING
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Tenneco Automotive Operating Co Inc
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Individual
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Assigned to TENNECO AUTOMOTIVE OPERATING COMPANY INC. reassignment TENNECO AUTOMOTIVE OPERATING COMPANY INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALCINI, WILLIAM V., XING, Wenliang, GOLIN, MICHAEL, WANG, LIN
Publication of US20160047285A1 publication Critical patent/US20160047285A1/en
Assigned to JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT reassignment JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT GRANT OF SECURITY INTEREST IN PATENT RIGHTS Assignors: TENNECO AUTOMOTIVE OPERATING COMPANY INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL TRUSTEE reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL TRUSTEE CONFIRMATORY GRANT OF SECURITY INTERESTS IN UNITED STATES PATENTS Assignors: BECK ARNLEY HOLDINGS LLC, CARTER AUTOMOTIVE COMPANY LLC, CLEVITE INDUSTRIES INC., FEDERAL-MOGUL CHASSIS LLC, FEDERAL-MOGUL FILTRATION LLC, FEDERAL-MOGUL FINANCING CORPORATION, FEDERAL-MOGUL IGNITION LLC, FEDERAL-MOGUL MOTORPARTS LLC, FEDERAL-MOGUL PISTON RINGS, LLC, FEDERAL-MOGUL POWERTRAIN IP LLC, FEDERAL-MOGUL POWERTRAIN LLC, FEDERAL-MOGUL PRODUCTS US LLC, FEDERAL-MOGUL SEVIERVILLE, LLC, FEDERAL-MOGUL VALVETRAIN INTERNATIONAL LLC, FEDERAL-MOGUL WORLD WIDE LLC, FELT PRODUCTS MFG. CO. LLC, F-M MOTORPARTS TSC LLC, F-M TSC REAL ESTATE HOLDINGS LLC, MUZZY-LYON AUTO PARTS LLC, TENNECO AUTOMOTIVE OPERATING COMPANY INC., TENNECO GLOBAL HOLDINGS INC., TENNECO INC., TENNECO INTERNATIONAL HOLDING CORP., THE PULLMAN COMPANY, TMC TEXAS INC.
Assigned to TENNECO AUTOMOTIVE OPERATING COMPANY INC. reassignment TENNECO AUTOMOTIVE OPERATING COMPANY INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A.
Assigned to FEDERAL-MOGUL CHASSIS LLC, FEDERAL-MOGUL IGNITION LLC, TENNECO INTERNATIONAL HOLDING CORP., CLEVITE INDUSTRIES INC., FEDERAL-MOGUL VALVE TRAIN INTERNATIONAL LLC, F-M MOTORPARTS TSC LLC, MUZZY-LYON AUTO PARTS LLC, FEDERAL-MOGUL FILTRATION LLC, FEDERAL-MOGUL FINANCING CORPORATION, CARTER AUTOMOTIVE COMPANY LLC, FEDERAL-MOGUL WORLD WIDE LLC, FEDERAL-MOGUL POWERTRAIN IP LLC, BECK ARNLEY HOLDINGS LLC, FEDERAL-MOGUL PRODUCTS US LLC, FELT PRODUCTS MFG. CO. LLC, TENNECO AUTOMOTIVE OPERATING COMPANY INC., FEDERAL-MOGUL MOTORPARTS LLC, F-M TSC REAL ESTATE HOLDINGS LLC, THE PULLMAN COMPANY, FEDERAL-MOGUL SEVIERVILLE, LLC, FEDERAL-MOGUL PISTON RINGS, LLC, TMC TEXAS INC., FEDERAL-MOGUL POWERTRAIN LLC, TENNECO GLOBAL HOLDINGS INC., TENNECO INC. reassignment FEDERAL-MOGUL CHASSIS LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION
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
    • F01N3/02—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
    • 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
    • F01N13/011—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 two or more purifying devices arranged in parallel
    • F01N13/017—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 two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • 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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • 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
    • 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
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/30—Removable or rechangeable blocks or cartridges, e.g. for 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present disclosure relates to an engine exhaust after-treatment system.
  • Combustion engines are known to produce emissions that may be harmful to the environment. In an effort to decrease the environmental consequences that an engine may have, exhaust after-treatment systems have undergone extensive analysis and development.
  • Various components that assist in treating engine emission include particulate filters and oxidation and reduction catalysts.
  • the present disclosure provides an engine exhaust after-treatment system including an exhaust passage; an exhaust treatment component housing communicating with the exhaust passage; a pair of baffles spaced apart within the housing; a plurality of exhaust treatment devices positioned between the pair of baffles, each exhaust treatment device including a canister; a plurality of restraining devices fixed between the pair of baffles for positioning each of the canisters between the baffles, each restraining device including at least a portion thereof that is angled relative to an outer surface of the canister such that ends of the restraining device abut the outer surface of the canister at the first end and prevent radial movement of the canister; and a soot blower positioned in the housing upstream of the exhaust treatment devices, the soot blower for dispersing particulate matter deposited on each of the exhaust treatment devices.
  • FIG. 1 is a schematic representation of an exhaust system in accordance with a principle of the present disclosure
  • FIG. 2 is a perspective view of an exhaust after-treatment system in accordance with a principle of the present disclosure
  • FIG. 3 is an exploded perspective view of the exhaust after-treatment system illustrated in FIG. 2 ;
  • FIG. 4 is a partial exploded perspective view of an exhaust treatment component in accordance with a principle of the present disclosure
  • FIG. 5 is a perspective view of a housing of an exhaust treatment component in accordance with a principle of the present disclosure
  • FIG. 6 is a perspective view of an interior of the housing illustrated in FIG. 5 as viewed from an inlet side;
  • FIG. 7 is a perspective view of an interior of the housing illustrated in FIG. 5 as viewed from an outlet side;
  • FIG. 8 is a cross-sectional view taken along line 8 - 8 shown in FIG. 5 ;
  • FIG. 9 is an enlarged cross-sectional view of one of the exhaust treatment components illustrated in FIG. 8 .
  • FIG. 1 schematically illustrates an exhaust system 10 according to the present disclosure.
  • Exhaust system 10 can include at least an engine 12 in communication with a pair of fuel source 14 a and 14 b that, once combusted, will produce exhaust gases that are discharged into an exhaust passage 16 having an exhaust after-treatment system 18 .
  • Fuel sources 14 a and 14 b may contain different fuels.
  • fuel source 14 a can include a low sulfur diesel fuel (LSF)
  • fuel source 14 b can include an ultra-low-sulfur diesel fuel (ULSF).
  • Other exemplary fuels that can be used include marine gas oil (MGO), marine diesel oil (MDO), intermediate fuel oil (IFO), heavy fuel oil (HFO), combinations of natural gas and diesel fuel, or blends of natural gas with hydrogen.
  • MGO marine gas oil
  • MDO marine diesel oil
  • IFO intermediate fuel oil
  • HFO heavy fuel oil
  • an exhaust treatment component 20 Downstream from engine 12 can be disposed an exhaust treatment component 20 , which can include a diesel oxidation catalyst (DOC), a catalyst-coated diesel particulate filter (DPF) component or, as illustrated, a selective catalytic reduction (SCR) component 22 .
  • DOC diesel oxidation catalyst
  • DPF catalyst-coated diesel particulate filter
  • SCR selective catalytic reduction
  • SCR component 22 can also include therein a DOC or a DPF.
  • SCR component 22 can be an SCR catalyst-coated DPF or an SCR catalyst-coated flow-through filter (FTF).
  • Exhaust after-treatment system 18 can further include components such as a thermal enhancement device or burner 24 to increase a temperature of the exhaust gases passing through exhaust passage 16 .
  • a thermal enhancement device or burner 24 to increase a temperature of the exhaust gases passing through exhaust passage 16 .
  • Increasing the temperature of the exhaust gas is favorable to achieve light-off of the catalyst in the exhaust treatment component 20 in cold-weather conditions and upon start-up of engine 12 , as well as initiate regeneration of the exhaust treatment component 20 when the exhaust treatment component 20 is a DPF.
  • exhaust after-treatment system 18 can include a dosing module 26 for periodically dosing an exhaust treatment fluid into the exhaust stream.
  • dosing module 26 can be located upstream of exhaust treatment component 20 , and is operable to inject an exhaust treatment fluid into the exhaust stream.
  • dosing module 26 is in fluid communication with a reagent tank 28 and a pump 30 by way of inlet line 32 to dose an exhaust treatment fluid such as diesel fuel, urea, or gaseous ammonia into the exhaust passage 16 upstream of exhaust treatment component 20 .
  • Tank 28 may store liquid exhaust treatment fluids, or may store solid or gaseous ammonia.
  • Other materials that can be used to enhance exhaust treatment in combination with urea can be ethanol or hydrogen that may be stored in a separate tank (not shown).
  • Dosing module 26 can also be in communication with reagent tank 28 via return line 34 .
  • Return line 34 allows for any exhaust treatment fluid not dosed into the exhaust stream to be returned to reagent tank 28 .
  • Flow of the exhaust treatment fluid through inlet line 32 , dosing module 26 , and return line 34 also assists in cooling dosing module 26 so that dosing module 26 does not overheat.
  • dosing module 26 can be configured to include a cooling jacket that passes a coolant around dosing module 26 to cool it.
  • the amount of exhaust treatment fluid required to effectively treat the exhaust stream may vary with load, engine speed, exhaust gas temperature, exhaust gas flow, engine fuel injection timing, desired NO x reduction, barometric pressure, relative humidity, EGR rate and engine coolant temperature.
  • a NO x sensor or meter 36 may be positioned downstream from SCR component 22 . NO x sensor 36 is operable to output a signal indicative of the exhaust NO x content to an engine control unit (ECU) 38 . All or some of the engine operating parameters may be supplied from ECU 38 via the engine/vehicle databus to an exhaust system controller 40 . The exhaust system controller 40 could also be included as part of the ECU 38 . Exhaust gas temperature, exhaust gas flow and exhaust back pressure and other vehicle operating parameters may be measured by respective sensors, as indicated in FIG. 1 .
  • the amount of exhaust treatment fluid required to effectively treat the exhaust stream can also be dependent on the size of the engine 12 .
  • large-scale diesel engines used in locomotives, marine applications, and stationary applications can have exhaust flow rates that exceed the capacity of a single dosing module 26 .
  • multiple dosing modules 26 for urea injection are contemplated by the present disclosure.
  • the type of fuel provided to engine 12 can be switched between different fuel sources 14 a and 14 b.
  • after-treatment system 18 is not necessarily being utilized. That is, when engine 12 is a marine application where the vessel is located a predetermined distance from shore, emission regulations may not require use of after-treatment system 18 . Accordingly, any exhaust produced by engine 12 while using a high-sulfur-content fuel (or any type of fuel) may be expelled into the atmosphere without passing through after-treatment system 18 .
  • exhaust system 10 may include an after-treatment by-pass pipe 44 .
  • a valve 48 may be positioned at an inlet of by-pass pipe 44 to allow exhaust gas to flow through by-pass pipe 44 or through after-treatment system 18 .
  • Valve 48 is in communication with controller 40 or ECU 38 . If engine 12 is operating on a high-sulfur-content fuel, controller 40 or ECU 38 can instruct valve 48 to open by-pass pipe 44 and close exhaust passage 16 downstream of valve 48 to allow exhaust to escape into the atmosphere without passing through after-treatment system 18 . Similarly, if engine 12 is being operated in an area where emission regulations require exhaust after-treatment, controller 40 or ECU 38 can instruct valve 48 to close by-pass pipe 44 to allow exhaust to pass through after-treatment system 18 .
  • Valves 50 a and 50 b are in communication with controller 40 and/or ECU 38 .
  • controller 40 or ECU 38 can instruct valves 50 a and 50 b to either open or close. For example, if engine 12 is switching to a lower-sulfur-containing fuel from a higher-sulfur-containing fuel, controller 40 or ECU 38 can instruct valve 50 a to close and instruct valve 50 b to open.
  • controller 40 or ECU 38 Before controller 40 or ECU 38 sends instructions to valves 50 a and 50 b to either open or close, controller 40 or ECU 38 can instruct burner 24 to be activated to raise exhaust temperatures to an extent where any un-combusted fuel present in the exhaust stream can be combusted (e.g., 300 C). In this regard, if a fuel switch is desired, controller 40 or ECU 38 can signal instruct burner 24 to activate and delay actuation of valves 50 a and 50 b until burner 24 has operated for a predetermined period of time.
  • valve 48 can be controlled to open by-pass pipe 44 during the fuel switch while burner 24 is activated. When the fuel switch is complete and burner 24 is deactivated, valve 48 can close by-pass pipe 44 and allow the exhaust to pass through exhaust after-treatment system 18 . In this manner, it can be ensured that any un-combusted high-sulfur-containing fuel can be prevented from reaching SCR component 22 .
  • valve 48 can be designed to be synchronized with fuel valves 50 a and 50 b. That is, if a signal is sent by controller 40 to fuel valve 50 b to open such that engine 12 can operate on a lower-sulfur-containing fuel, valve 48 can simultaneously receive a signal to close by-pass pipe 44 to allow exhaust to travel through exhaust after-treatment system 18 . Similarly, if a signal is sent by controller 40 to open fuel valve 50 a such that engine 12 can operate on a higher-sulfur-containing fuel, valve 48 can simultaneously receive a signal to open by-pass pipe 44 to allow exhaust to be expelled into the atmosphere before passing through after-treatment system 18 .
  • After-treatment system 18 includes exhaust passage 16 that provides exhaust produced by engine 12 to exhaust treatment component 20 .
  • a pair of mixing devices 52 can be disposed in exhaust passage 16 at a location between dosing module 26 and exhaust treatment component 20 . Mixing devices 52 assist in dispersing and intermingling the exhaust treatment fluid dosed into the exhaust passage 16 with the exhaust produced by engine 12 .
  • a pair of mixing devices 52 are illustrated in FIGS. 2 and 3 , it should be understood that a greater or fewer number of mixing devices 52 can be used without departing from the scope of the present disclosure.
  • Exhaust after-treatment system 18 can be supported by a plurality of support structures 53 .
  • valve 48 can be located at inlet 54 and operated to allow exhaust travelling in exhaust passage 16 to bypass exhaust treatment component 20 .
  • another valve 56 can also be located at an exhaust treatment component inlet 58 so that when bypass pipe 44 is opened, fluid flow through exhaust treatment component 20 can be prevented by valve 56 .
  • valve 48 if valve 48 is open, valve 56 is closed.
  • Each of valves 48 and 56 can be, for example, butterfly-type valves actuated by a solenoid (not shown).
  • bypass pipe 44 can be modular in design.
  • bypass pipe 44 can include a pair of curved sections 60 a and 60 b connected via a plurality of intermediate sections 62 , 64 , and 66 .
  • intermediate sections 62 and 66 are illustrated in FIGS. 2 and 3 as being cylindrically-shaped pipes, it should be understood that intermediate sections 62 and 66 can comprise flexible bellows that allow for thermal expansion during use of bypass pipe 44 .
  • Downstream from curved section 60 b can be an outlet 68 that feeds the bypassed exhaust back into exhaust passage 16 at a position downstream from exhaust treatment component 20 .
  • Inlet 54 and outlet 68 of bypass pipe 44 can be integral or unitary with exhaust passage 16 , or can be separately formed components similar to curved sections 60 a and 60 b and intermediate sections 62 , 64 , and 66 .
  • Exhaust treatment component 20 can include a housing 70 that supports a plurality of SCR components 22 .
  • housing 70 is box-shaped and includes a plurality of outer panels 71 .
  • Within outer panels 71 of housing 70 may be disposed a plurality of trusses 73 .
  • Trusses 73 can be L-shaped members that are positioned at corners of outer panels 71 within an interior of housing 70 .
  • Trusses 73 provide structural support to housing 70 , and allow housing 70 to support each of SCR components 22 .
  • Between trusses 73 can also be positioned cross-members 75 . Similar to trusses 73 , cross-members 75 provide structural support to housing 70 .
  • Housing 70 supports an array of nine SCR components 22 . Although nine SCR components 22 are illustrated in the figures, it should be understood that any number of SCR components 22 can be supported within housing 70 without departing from the scope of the present disclosure. SCR components 22 may be cylindrically-shaped, although any configuration for SCR components 22 is contemplated.
  • Housing 70 can be disposed between an inlet cone 72 and an outlet cone 74 .
  • Inlet cone 72 includes a flange 76 that corresponds and bolts to flange 78 of housing 70 .
  • Outlet cone 74 can include a flange 80 that corresponds and bolts to another flange 82 of housing 70 .
  • Such a configuration results in rigid and hermetically-sealed exhaust treatment component 20 .
  • housing 70 can include an inlet side 84 and an outlet side 86 .
  • inlet side 86 can be positioned a particulate matter dispersion device 88 (hereinafter “soot blower”).
  • Soot blower 88 is designed and operable to eject compressed air towards SCR components 22 to disperse any deposits of particulate matter that may build up on SCR components 22 .
  • Soot blower 88 includes a plurality of arrays 90 of nozzle lines 92 , with each nozzle line 92 including a plurality of nozzles 94 for ejecting compressed air towards exhaust SCR components 22 .
  • Nozzle lines 92 can be formed of various metal materials including aluminum, steel, copper, or any other material known to one skilled in the art.
  • Housing 70 can include a plurality of apertures (not shown) that allow nozzle lines 92 to pass therethrough.
  • a seat member 98 and gasket 100 can be used to secure nozzle lines 92 at apertures.
  • the present disclosure also provides a soot blower 88 that is designed to prevent the build-up of particulate matter and/or soot at locations other than the SCR component 22 face. More particularly, particulate matter and/or soot can build up at locations other than the SCR component 22 face. If too much particulate matter and/or soot builds up at these “dead spots” between SCR components 22 , the built-up particulate matter and/or soot can eventually break off and plug the SCR components 22 . Accordingly, it should be understood that nozzles 94 can be positioned to eject compressed air at positions between SCR components 22 without departing from the scope of the present disclosure.
  • Housing 70 can include a pair of baffles 102 a and 102 b to support each SCR component 22 .
  • Baffles 102 a and 102 b can be welded to inner surfaces 104 of housing 70 and include a plurality of through-holes 106 ( FIG. 9 ) sized to receive SCR components 22 .
  • Each SCR component 22 includes a canister 108 that houses a SCR substrate 110 . Between canister 108 and SCR substrate 110 can be disposed an insulating mat 112 .
  • Restraining devices 114 can be a linear (e.g., planar) member that is welded between baffles 102 a and 102 b. Alternatively, restraining devices 114 can be L-shaped in cross-section ( FIG. 7 ). Regardless, as best illustrated in FIG. 9 , at least a portion of restraining devices 114 are positioned at an angle ⁇ relative to a surface 116 of canister 108 that runs parallel with an axis A of SCR component 22 . Angle a may be in the range of 1 to 20 degrees, inclusive. Preferably, angle ⁇ is in the range of 5 to 15 degrees, inclusive. Most preferably, angle ⁇ is in the range of 5 to 10 degrees, inclusive.
  • restraining device 114 Due to at least a portion of restraining device 114 being angled relative to surface 116 , restraining device 114 will abut canister 108 at a first end 118 as SCR component 22 is inserted into housing 70 . Once restraining device 114 abuts canister 108 , radial movement of SCR component 22 is prevented.
  • FIGS. 7 and 9 illustrate the abutment between restraining device 114 and canister 108 . Moreover, the abutment between restraining devices 114 and canister 108 assists in positioning the canister between baffles 102 a and 102 b during insertion of canisters into housing 70 .
  • a second end 120 of canister 108 can be secured by bolting ear members 122 .
  • Ear members 122 can be separately-formed members that are welded to second end 120 of canister 108 .
  • canister 108 can be provided with a radially extending flange (not shown) at second end 120 .
  • ear member 122 is operable to receive a fastener 124 that bolts ear member 122 and canister 108 to baffle 102 b.
  • four restraining devices 114 (as represented by ears 122 ) can be used to secure canister 108 between baffles 102 a and 102 b. It should be understood, however, that a greater or lesser number of restraining devices 114 can be used without departing from the scope of the present disclosure.
  • restraining devices 114 secure first end 118 of canister 108 , it is unnecessary to bolt first end 118 of canister 108 to baffle 102 a.
  • the ease with which canisters 108 can be inserted and removed from housing 70 can be increased. More particularly, if any of SCR components 22 require servicing, only fasteners 124 need to be removed to withdraw SCR components 122 from housing 70 . This greatly reduces service time in comparison to a configuration where SCR components 22 are bolted in first and second ends 118 and 120 , or welded to baffles 102 a and 102 b.
  • ear members 122 can include an aperture 123 that may receive a tool (not shown) to assist an operator in pulling SCR component 22 from housing 70 .

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  • 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)
  • Exhaust Gas After Treatment (AREA)
US14/782,874 2013-04-10 2013-04-10 Engine Exhaust After-Treatment System Abandoned US20160047285A1 (en)

Applications Claiming Priority (1)

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PCT/CN2013/074000 WO2014166076A1 (fr) 2013-04-10 2013-04-10 Système de post-traitement d'échappement de moteur

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JP (1) JP2016514799A (fr)
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US20170122172A1 (en) * 2014-06-11 2017-05-04 Tenneco Automotive Operating Company Inc. Fluid delivery system with line pressure control valve
CN108487977A (zh) * 2018-05-25 2018-09-04 哈尔滨工程大学 一种船用大功率柴油机的球面环流式双通道高压scr反应器
CN108547684A (zh) * 2018-06-22 2018-09-18 南京依柯卡特排放技术股份有限公司 大功率分布式能源尾气净化DeNOx系统用催化装置
US10202883B2 (en) 2014-11-21 2019-02-12 Tenneco (Suzhou) Emission System Co., Ltd. Common rail assembly, urea injection system and application thereof
US10634034B2 (en) 2014-11-21 2020-04-28 Tenneco (Suzhou) Emission System Co., Ltd. Common rail, application of the common rail, carbamide spraying system, and control method therefor
US10731536B1 (en) 2019-03-20 2020-08-04 Caterpillar Inc. Exhaust gas aftertreatment system
WO2022098969A1 (fr) * 2020-11-06 2022-05-12 Cummins Emission Solutions Inc. Système de post-traitement des gaz d'échappement

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FR3035596B1 (fr) * 2015-04-28 2017-05-19 Lab Sa Installation et procede de denitrification catalytique de fumees
US10036294B2 (en) 2015-05-28 2018-07-31 Caterpillar Inc. Aftertreatment module with reduced bypass flow
DE102016205274A1 (de) * 2016-03-31 2017-10-05 Man Diesel & Turbo Se Abgasnachbehandlungssystem und Brennkraftmaschine
DE102016205316A1 (de) * 2016-03-31 2017-10-05 Man Diesel & Turbo Se Katalysatoreinheit und Abgaskatalysator
DE102016220421B4 (de) * 2016-10-18 2023-12-14 Man Energy Solutions Se Abgasnachbehandlungssystem und Brennkraftmaschine
FR3063305B1 (fr) * 2017-02-24 2021-06-04 Lab Sa Dispositif et procede de nettoyage d'un equipement de depollution de fumees, en particulier d'un catalyseur de denitrification ou d'un echangeur de chaleur
KR102447700B1 (ko) * 2018-04-30 2022-09-29 에이치에스디엔진 주식회사 선택적 촉매 환원 시스템 및 질소산화물 저감 방법
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US20170122172A1 (en) * 2014-06-11 2017-05-04 Tenneco Automotive Operating Company Inc. Fluid delivery system with line pressure control valve
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US10634034B2 (en) 2014-11-21 2020-04-28 Tenneco (Suzhou) Emission System Co., Ltd. Common rail, application of the common rail, carbamide spraying system, and control method therefor
US20160160727A1 (en) * 2014-12-05 2016-06-09 Caterpillar Inc. Aftertreatment module having replaceable catalyst housing
US9677447B2 (en) * 2014-12-05 2017-06-13 Caterpillar Inc. Aftertreatment module having replaceable catalyst housing
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CN108487977A (zh) * 2018-05-25 2018-09-04 哈尔滨工程大学 一种船用大功率柴油机的球面环流式双通道高压scr反应器
CN108547684A (zh) * 2018-06-22 2018-09-18 南京依柯卡特排放技术股份有限公司 大功率分布式能源尾气净化DeNOx系统用催化装置
US10731536B1 (en) 2019-03-20 2020-08-04 Caterpillar Inc. Exhaust gas aftertreatment system
WO2022098969A1 (fr) * 2020-11-06 2022-05-12 Cummins Emission Solutions Inc. Système de post-traitement des gaz d'échappement

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WO2014166076A1 (fr) 2014-10-16
CN105189963A (zh) 2015-12-23
DE112013006933T5 (de) 2016-01-07
JP2016514799A (ja) 2016-05-23
KR20150139968A (ko) 2015-12-14

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