New! View global litigation for patent families

US20080141662A1 - Fluid injecting and mixing systems for exhaust after-treatment devices - Google Patents

Fluid injecting and mixing systems for exhaust after-treatment devices Download PDF

Info

Publication number
US20080141662A1
US20080141662A1 US11862293 US86229307A US2008141662A1 US 20080141662 A1 US20080141662 A1 US 20080141662A1 US 11862293 US11862293 US 11862293 US 86229307 A US86229307 A US 86229307A US 2008141662 A1 US2008141662 A1 US 2008141662A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
exhaust
fluid
treatment
secondary
mixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11862293
Inventor
Markus Schuster
Ted G. Gomulka
Sascha Haverkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenneco Automotive Operating Co Inc
Original Assignee
Tenneco Automotive Operating Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/009Exhaust 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 separate purifying devices arranged in series
    • F01N13/0097Exhaust 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 separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842Nitrogen oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/20Exhaust 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
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/30Arrangements for supply of additional air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination 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
    • F01N2240/20Combination 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/03Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • Y02A50/2325
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/20Exhaust after-treatment
    • Y02T10/24Selective Catalytic Reactors for reduction in oxygen rich atmosphere
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems
    • Y02T10/47Exhaust feedback

Abstract

A system for applying secondary fluids to vehicular exhaust after-treatment apparatus utilizes a mixing chamber coupled for receipt of a portion of the vehicle's exhaust flow. A source of secondary fluid is coupled to the mixing chamber and a fluid distribution element is positioned in a mean exhaust flow conduit upstream of the exhaust after-treatment apparatus. The fluid distribution element presents a preselected pattern of fluid flow toward an upstream face of the after-treatment apparatus.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • [0001]
    This application claims the benefit of U.S. Provisional Application No. 60/874,921, filed on Dec. 14, 2006, which is hereby incorporated by reference.
  • FIELD
  • [0002]
    The present disclosure relates to exhaust after-treatment devices. More particularly, the disclosure pertains to regeneration, oxidation or reduction of emissions by such devices.
  • BACKGROUND
  • [0003]
    The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
  • [0004]
    Exhaust after-treatment systems for on-highway Diesel engines will typically include Diesel particulate filters (DPF), NO, adsorbers (LNT) and selective catalytic reduction (SCR) systems in upcoming model years. A regenerative oxidizing or reducing fluid (a secondary fluid) is needed for proper functioning and/or maintenance of the substrates used in each of these devices. In most applications, DPFs will require injection of hydrocarbons (HC), for example, Diesel fuel, for periodic regeneration or oxidation of the trapped soot in the filter. SCR systems rely on injection of a reductant (typically urea) upstream of a catalyst for reduction of oxides of nitrogen emissions. LNTs require periodic regeneration using exhaust gas rich in hydrocarbon or carbon monoxide, typically provided by injecting excess Diesel fuel into the exhaust stream. Currently, common practice for injection of these hydrocarbon fuels and urea is to inject them into the exhaust pipe upstream of the after-treatment device. This injection must be done at a location far enough upstream of the device to insure adequate mixing, evaporation and/or hydrolysis of the injected fluid, typically a linear distance of ten or more pipe diameters upstream.
  • [0005]
    Disadvantages of the conventional method arise when SCR, LNT, and/or DPF systems must be either packaged into a restricted space or coupled together in a common housing. There may be insufficient exhaust pipe length available for adequate mixing, evaporation, and/or hydrolysis of the injected fluid, or the use of sufficient exhaust pipe length will result in unacceptable total back pressure for the after-treatment system. Due to packaging constraints, there may also be after-treatment components positioned in the exhaust pipe path needed for injection, mixing, evaporation, and/or hydrolysis, which would interfere with the proper functioning of the after-treatment devices.
  • [0006]
    Therefore there is seen to be a need in the art for an arrangement to facilitate adequate mixing, evaporation and/or hydrolysis of the injected secondary fluid where a suitable length of exhaust pipe is not available.
  • SUMMARY
  • [0007]
    The present teachings are directed to auxiliary piping, alternative pipe routing and auxiliary devices needed to facilitate injection, mixing, evaporation and/or hydrolysis of the secondary fluids needed for vehicular exhaust after-treatment systems. Such secondary fluids are, for example and without limitation, regenerating fluids or oxidizing fluids or reducing fluids.
  • [0008]
    In one aspect of the invention, a pipe along the after-treatment device runs parallel to the exhaust flow. This pipe enters the after-treatment device from the side, upstream from the device substrate needing the secondary fluid. Prior to and during injection, this pipe is fed with compressed air to achieve pressure higher than that at the point where it enters the exhaust flow and to achieve flow rate sufficient for adequate mixing, evaporation and/or hydrolysis of the secondary fluid. At the point where the mixing pipe enters the exhaust flow, a valve maintains this positive pressure in the pipe. The secondary fluid is injected into this pipe and the valve is opened as needed.
  • [0009]
    In a second aspect of the present teachings, one or more pipes parallel to the main exhaust pipe between the engine and the after-treatment device run from a location off the exhaust manifold or turbocharger upstream of a turbine inlet to the point in the after-treatment system just upstream of the component requiring the injected secondary fluid.
  • [0010]
    In a third aspect of the instant teachings, the exhaust after-treatment device is provided with a center channel or conduit extending through the device substrate which comprises the mixing chamber for the exhaust/secondary fluid.
  • [0011]
    Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
  • BRIEF DESCRIPTION OF THE DRAWING
  • [0012]
    The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
  • [0013]
    The objects and features of the present teachings will become apparent from a reading of a detailed description, taken in conjunction with the drawing, in which:
  • [0014]
    FIG. 1 is a cross-sectional view of an exhaust after-treatment system including a variety of after-treatment devices within a single housing, the system including a parallel path secondary fluid mixture system arranged in accordance with the instant teachings;
  • [0015]
    FIG. 2 is a side partial cross-sectional view of a first alternative embodiment of an exhaust after-treatment system arranged in accordance with the principles of the instant disclosure;
  • [0016]
    FIG. 3 is a partial cross-sectional view of a second alternative embodiment of an exhaust after-treatment system arranged in accordance with the principles of the instant disclosure,
  • [0017]
    FIGS. 4A and 4B are respective side and end cross-sectional views of the after-treatment device of FIG. 3 depicting a regenerative fluid distribution element arranged in accordance with the principles of the instant disclosure;
  • [0018]
    FIG. 5 is a cross-sectional view of a third embodiment of an exhaust after-treatment system arranged in accordance with the principles of the instant disclosure; and
  • [0019]
    FIG. 6 is a perspective view of an alternative exhaust after-treatment device with an internal mixing chamber with its outer shell removed and arranged in accordance with the principles of the instant disclosure.
  • DETAILED DESCRIPTION
  • [0020]
    The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
  • [0021]
    With reference to FIG. 1, exhaust after-treatment system 100 includes a multi-purpose exhaust after-treatment device containing several elements. Input exhaust to the device is shown at arrow 130, while output exhaust from the device is shown at arrow 132. The multi-purpose after-treatment device comprises a first Diesel oxidation catalyst or NOx adsorber substrate 102 a, a selective catalytic reduction substrate 104, a second Diesel oxidation catalyst or NOx adsorber substrate 102 b, a Diesel particulate filter substrate 106 and a third Diesel oxidation catalyst or NOx adsorber substrate 102 c. Each of these substrates are separated by an inter-substrate gap for purposes of receiving a secondary fluid distribution element to be discussed below.
  • [0022]
    A urea mixing tube 106 runs substantially parallel to exhaust flow alongside the exhaust after-treatment device and receives a combination of urea and compressed air at an input 108 for mixing within a chamber 116 of conduit 106. A valve 120 a introduces the compressed air/urea mixture into a first regenerative fluid distribution element 122 a placed between substrates 102 a and 104 and carrying a plurality of radially oriented perforations or orifices 123 for directing the secondary fluid coming from conduit 106 to the input face of substrate 104.
  • [0023]
    A hydrocarbon mixing tube 110 also extends substantially parallel to the exhaust flow and receives a mixture of hydrocarbons, such as Diesel fuel, and compressed air at an input 112 for mixing in chamber 118 of conduit 110. Optionally, a glow plug or other auxiliary heat component 114 may extend into the mixing chamber 118. A valve 120 b is used to meter the mixture of exhaust and secondary fluid into a distribution element 122 b. Conduits 106 and 110 enter the after-treatment device from the side, upstream from the particular substrate requiring the secondary fluid. Prior to and during injection, these pipes are fed additionally with compressed air to achieve a pressure higher than that at the point where the fluid/exhaust mixture enters the exhaust flow through the device and at a flow sufficient for proper mixing, evaporation and/or hydrolysis of the secondary fluid. At the point where the secondary fluid enters the exhaust flow, a valve maintains this positive pressure in the pipe. The secondary fluid is injected and the valve is opened as needed.
  • [0024]
    These parallel pipes expel the mixture of air and injected secondary fluid into the exhaust after-treatment device inter-substrate chamber just upstream of that substrate to a series of orifices tuned to provide the flow pattern needed across the face of the substrate being treated.
  • [0025]
    Other auxiliary devices might also be incorporated into this parallel piping system, including heating devices to aid in evaporation of secondary fluids, burners to assist in regeneration of LNTs and/or DPFs, and/or devices to create laminar or turbulent flow profiles or to aid in mixing of the exhaust gas and secondary fluids. Alternatively, the conduits such as 106 and 110 may be physically attached to the shell of the after-treatment device housing in such a way that heat transfer from the after-treatment device occurs thereby aiding the heating of the air/secondary fluid mixture.
  • [0026]
    In the embodiment of FIG. 2, exhaust after-treatment system 200 utilizes auxiliary piping for establishing a parallel exhaust flow stream into which is injected the secondary fluid. Diesel engine 202 has an exhaust manifold 204 which empties into a turbocharger 206. Exhaust is then carried via exhaust pipe 208 to an input 222 of an exhaust after-treatment device 220. Substantially parallel to the flow of exhaust through conduit 208 is a conduit 210 for carrying exhaust likewise directly from the exhaust manifold 204 or, optionally, from turbocharger 206 to a secondary input 224 of after-treatment device 220. Injector 212 injects the secondary fluid required into the exhaust stream flowing through conduit 210 for introduction to device 220 at input 224. This mixture then flows through the substrate 226 of after-treatment device 220 and exits at output 228 thereof for receipt by tailpipe or further exhaust pipe 230. Hence, it is seen that conduit 210 runs from a location on the exhaust manifold 204 or from a turbocharger 206 upstream of the turbine inlet to a point in the after-treatment system just upstream of the substrate component requiring the injected secondary fluid. Because conduit 210 originates at a location having pressure much higher than that just upstream of the substrate 226, flow of exhaust through conduit 210, past the injector 212 and through the mixing length of conduit 210 would be insured.
  • [0027]
    In another possible configuration such as set forth in FIG. 3, a pipe or pipes carry exhaust gas on a path parallel to the flow through an after-treatment substrate, bypass it and allow a diameter-to-length ratio sufficient for injection and proper mixing, evaporation, and/or hydrolysis of the secondary fluid. Exhaust after-treatment system 300 includes an after-treatment device 306 situated between an exhaust pipe 304 and a tailpipe 332. Exhaust flow is shown by arrows 302.
  • [0028]
    Exhaust enters device 306 at inlet 308 to an input chamber 310. From chamber 310 exhaust flows both through substrate 326 and through substantially parallel conduit 312 past an injector 316 for injecting secondary fluid into the exhaust flow as shown by arrow 322. This mixture then flows into chamber 311 of device 306 and there flows both through substrate 328 and back through a second parallel pipe 314 past a second injector 318. The mixture flows as shown in arrow 324 back to chamber 310 for treatment of substrate 326. Since this configuration may not necessarily carry gas from an area of higher pressure to one of lower pressure, an auxiliary pumping device 320 could be made part of system 300 to facilitate proper flow and adequate mixing, evaporation and/or hydrolysis of the secondary fluid.
  • [0029]
    With reference to FIGS. 4A and 4B, both of the embodiments of FIGS. 2 and 3 would expel the mixture of exhaust gas and injected secondary fluid into a chamber just upstream of the after-treatment substrate component being treated through a series of orifices 404 in a toroidal or helical ring 402 adjacent to the chamber's outer skin. In cases where injection is required on only a periodic basis (e.g., LNT or DPF regeneration), one or more valves may be positioned in the system to initiate and halt exhaust flow through the parallel pipe or pipes.
  • [0030]
    A third embodiment of an exhaust after-treatment system arranged in accordance with the principles of these teachings is set forth in FIG. 5. Exhaust after-treatment system 500 includes an input exhaust pipe 502 having an injector 504 for injecting secondary fluid into the exhaust stream entering input 518 of after-treatment device 510. In this embodiment, the mixing chamber is contained inside after-treatment device 510 by forming a channel for receipt of a mixing conduit 508 which extends through the substrate 512. In the particular device shown in FIG. 5, the exhaust outlet 520 of the device 510 is located at the same end as the exhaust inlet. A turnaround chamber 516 takes the mixture of exhaust gas and secondary fluid and forces it to turn in a reverse direction and flow through the substrate orifices itself thence to an output chamber 514 for expulsion from output 520.
  • [0031]
    An alternative to the after-treatment device 510 shown in FIG. 5 is set forth in FIG. 6. In the arrangement of FIG. 6, two pipes running from a chamber at the front face of the after-treatment device substrate pass through the after-treatment device substrate to its rear face. One of these pipes carries exhaust gas through the catalyst substrate to its rear face where flow would reverse and pass back through the substrate itself. The second pipe would carry the gas after its emerges from the front face of the substrate and reverses direction again back through the internal channel of the substrate to the chamber in front of a second downstream substrate. An example would be an SCR system followed by a DPF, where secondary fluids must be injected and mixed prior to each after-treatment device. By carrying exhaust gas on a path parallel to the flow through an after-treatment component, bypassing it and allowing a diameter-to-length ratio sufficient for injection and proper mixing, evaporation, and/or hydrolysis, the arrangement of FIG. 6 enables proper introduction of the secondary fluid in situations where such might be otherwise impracticable. Again, where injection of the secondary fluid is required only on a periodic basis, one or more valves may be positioned in the system to close off the injectors from the exhaust flow.
  • [0032]
    Device 600 of FIG. 6 receives exhaust gas flow from exhaust pipe 602, the flow being depicted by arrows 604 a. Exhaust input conduit 606 forms a first mixing chamber for the exhaust gas and the secondary fluid injected via injector 610 into the input volume defined by a first partition 608 on one side thereof. The exhaust/secondary fluid mixture then proceeds as shown by arrows 604 b down the conduit 606 to a turnaround chamber at a downstream face of the substrate 616 defined by a second partition 618. The exhaust/secondary fluid mixture then proceeds via arrows 604 c back through the structure of the substrate 616 itself to a second injection area defined between the substrate 616 and partition 608 where a second injector 612 injects a further secondary fluid into the exhaust stream for carrying back through substrate 616 through a second internal conduit 614 for use downstream by a further after-treatment device which is located to the left of partition 618 as shown in FIG. 6. This output flow of exhaust/secondary fluid is shown by arrows 604 d.
  • [0033]
    Systems arranged in accordance with the principles of the disclosure herein provide packaging advantages where the envelope for the after-treatment system is small and a combination of after-treatment devices must be coupled together in a common housing shell. Systems in accordance with the disclosure likewise provide ease of configuration in situations where there is insufficient length in the main exhaust pipe to support proper mixing, evaporation, and/or hydrolysis of the secondary fluid. Additionally, such systems provide more effective mixing and uniformity of the mixture in cases where the mixing conduits can be made with a better length-to-diameter ratio and/or a straighter path than the main exhaust pipe. Furthermore, a tunable entry path for the secondary fluid-rich mixture into a region upstream of the after-treatment component being treated is provided. Finally, the systems of the instant disclosure enable use of larger diameter catalyst substrates (for better flow uniformity and lower system back pressure), which will in many cases require positioning of the substrates close together, thereby eliminating lengths of pipe, end cones, etc., between the substrates that would otherwise be suitable for injection, and proper mixing of the exhaust stream with the secondary fluid in use.
  • [0034]
    The invention has been described with reference to embodiments which have been set forth for the sake of example only. The invention is to be described with reference to the appropriately construed claims.

Claims (12)

  1. 1. A system for applying secondary fluids to vehicular after-treatment apparatus, the system comprising:
    a mixing chamber coupled for receipt of a portion of exhaust flow at a mixing chamber inlet;
    a source of secondary fluid in fluid communication with the mixing chamber; and
    a fluid distribution element positioned in a main exhaust flow conduit upstream of the exhaust after-treatment apparatus and coupled to an output of the mixing chamber, the flow distribution element operative to present a preselected pattern of fluid flow toward an upstream face of the after-treatment apparatus.
  2. 2. The system of claim 1 wherein the mixing chamber is separate from the main exhaust flow conduit.
  3. 3. The system of claim 2 wherein the mixing chamber comprises a conduit extending substantially parallel to the main exhaust flow conduit.
  4. 4. The system of claim 1 further comprising a secondary fluid injector for injecting, under pressure, secondary fluid received from the source of secondary fluid into the mixing chamber.
  5. 5. The system of claim 1 further comprising a valve positioned in the output of the mixing chamber and operative to selectively permit and prohibit fluid communication between the mixing chamber and the fluid distribution element.
  6. 6. The system of claim 1 wherein the exhaust after-treatment apparatus comprises a particulate filter and the secondary fluid comprises filter regenerating fluid.
  7. 7. The system of claim 1 wherein the exhaust after-treatment device comprises a selective catalytic reduction catalytic converter and the secondary fluid comprises a reductant.
  8. 8. The system of claim 1 wherein the exhaust after-treatment device comprises a nitrous oxide adsorber and the secondary fluid comprises a converter substrate regenerating fluid.
  9. 9. The system of claim 1 wherein the mixing chamber is positioned within a housing of the after-treatment apparatus.
  10. 10. The system of claim 3 wherein the mixing chamber input is coupled to an exhaust manifold of the vehicle.
  11. 11. The system of claim 1 wherein the fluid distribution element comprises a perforated conduit having a series of orifices positioned with respect to the upstream face of the after-treatment apparatus so as to present the preselected pattern.
  12. 12. The system of claim 11 wherein the perforated conduit is toroidal.
US11862293 2006-12-14 2007-09-27 Fluid injecting and mixing systems for exhaust after-treatment devices Abandoned US20080141662A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US87492106 true 2006-12-14 2006-12-14
US11862293 US20080141662A1 (en) 2006-12-14 2007-09-27 Fluid injecting and mixing systems for exhaust after-treatment devices

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US11862293 US20080141662A1 (en) 2006-12-14 2007-09-27 Fluid injecting and mixing systems for exhaust after-treatment devices
CA 2667062 CA2667062A1 (en) 2006-12-14 2007-10-30 Fluid injecting and mixing systems for exhaust after-treatment devices
KR20097014524A KR20090094457A (en) 2006-12-14 2007-10-30 Fluid injecting and mixing systems for exhaust after-treatment devices
CN 200780046027 CN101563529A (en) 2006-12-14 2007-10-30 Fluid injecting and mixing systems for exhaust after-treatment devices
PCT/US2007/022851 WO2008076175A3 (en) 2006-12-14 2007-10-30 Fluid injecting and mixing systems for exhaust after-treatment devices
JP2009541300A JP2010513773A (en) 2006-12-14 2007-10-30 Mixing system for fluid injection and the exhaust post-treatment device
DE200711002861 DE112007002861T5 (en) 2006-12-14 2007-10-30 Fluid injection and mixing systems for exhaust aftertreatment devices

Publications (1)

Publication Number Publication Date
US20080141662A1 true true US20080141662A1 (en) 2008-06-19

Family

ID=39525486

Family Applications (1)

Application Number Title Priority Date Filing Date
US11862293 Abandoned US20080141662A1 (en) 2006-12-14 2007-09-27 Fluid injecting and mixing systems for exhaust after-treatment devices

Country Status (7)

Country Link
US (1) US20080141662A1 (en)
JP (1) JP2010513773A (en)
KR (1) KR20090094457A (en)
CN (1) CN101563529A (en)
CA (1) CA2667062A1 (en)
DE (1) DE112007002861T5 (en)
WO (1) WO2008076175A3 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100242448A1 (en) * 2009-03-26 2010-09-30 Gm Global Technology Operations, Inc. Exhaust gas treatment system including a four-way catalyst and urea scr catalyst and method of using the same
US20100242438A1 (en) * 2009-03-26 2010-09-30 Gm Global Technology Operations, Inc. Exhaust gas treatment system including a four-way catalyst and urea scr catalyst and method of using the same
US20110047970A1 (en) * 2009-09-01 2011-03-03 Cummins Intellectual Properties, Inc. HIGH EFFICIENCY NOx REDUCTION SYSTEM AND METHOD
WO2011037996A1 (en) * 2009-09-25 2011-03-31 Tenneco Automotive Operating Company, Inc. Combined exhaust gas aftertreatment/air cleaner dust and ejector unit
WO2012044731A2 (en) * 2010-09-30 2012-04-05 Electro-Motive Diesel, Inc. Turbocharger mixing manifold for an exhaust aftertreatment system for a locomotive having a two-stroke locomotive diesel engine
WO2013117230A1 (en) * 2012-02-09 2013-08-15 Toyota Motor Europe Nv/Sa Reduction agent injector
US20130291518A1 (en) * 2012-05-07 2013-11-07 Ajay Patel Exhaust system having a pre-heater
US20140010640A1 (en) * 2011-03-22 2014-01-09 Delphi Technologies Holding, S.A.R.L. Regeant dosing pump assembly
WO2013156856A3 (en) * 2012-04-19 2014-01-23 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US20140026540A1 (en) * 2011-03-30 2014-01-30 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Compact exhaust gas treatment unit with mixing region, method for mixing an exhaust gas and vehicle
US9180407B2 (en) 2008-12-17 2015-11-10 Donaldson Company, Inc. Flow device for an exhaust system
CN105134349A (en) * 2015-08-21 2015-12-09 天纳克(苏州)排放系统有限公司 Exhaust gas disposal device
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9810126B2 (en) 2010-01-12 2017-11-07 Donaldson Company, Inc. Flow device for exhaust treatment system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013217351A (en) * 2012-04-12 2013-10-24 Futaba Industrial Co Ltd Exhaust emission control device
FI20126122A (en) * 2012-10-29 2014-04-30 Wärtsilä Finland Oy The method of mixing the reducing agent and the exhaust gas and the exhaust system
CN205025535U (en) * 2013-04-25 2016-02-10 天纳克(苏州)排放系统有限公司 Mix subassembly, inlet tube subassembly and exhaust aftertreatment part thereof

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097665A (en) * 1988-11-01 1992-03-24 Kammel Refaat A Flattened profile diesel engine exhaust oxidizer
US6004520A (en) * 1995-12-13 1999-12-21 Daimler-Benz Ag Method for operating a purification device, a purification device and use of the same
US6125629A (en) * 1998-11-13 2000-10-03 Engelhard Corporation Staged reductant injection for improved NOx reduction
US6314722B1 (en) * 1999-10-06 2001-11-13 Matros Technologies, Inc. Method and apparatus for emission control
US20020062641A1 (en) * 2000-11-30 2002-05-30 Nissan Motor Co., Ltd. Exhaust gas purification apparatus and method
US20030140622A1 (en) * 2002-01-25 2003-07-31 William Taylor Combination emission abatement assembly and method of operating the same
US6655133B2 (en) * 2001-03-29 2003-12-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifier for internal combustion engine
US6679052B2 (en) * 2001-07-31 2004-01-20 Toyota Jidosha Kaisha Emission control apparatus
US6680037B1 (en) * 1999-07-08 2004-01-20 Johnson Matthey Public Limited Company Device and method for removing sooty particulate from exhaust gases from combustion processes
US6708484B2 (en) * 2001-04-03 2004-03-23 Nissan Motor Co., Ltd. Exhaust gas purifying system
US6722124B2 (en) * 2001-06-01 2004-04-20 Nelson Burgess Limited Catalytic converter
US6729127B2 (en) * 2000-08-30 2004-05-04 J. Eberspächer GmbH & Co. KG Exhaust cleaning system for motor vehicles, especially diesel-powered utility vehicles
US20050013756A1 (en) * 2003-05-28 2005-01-20 Kiyoshi Amou Engine exhaust gas treatment system and exhaust gas treatment process
US6883311B2 (en) * 2003-07-02 2005-04-26 Detroit Diesel Corporation Compact dual leg NOx absorber catalyst device and system and method of using the same
US20050274104A1 (en) * 2004-06-15 2005-12-15 Leslie Bromberg Optimum regeneration of diesel particulate filters and NOx traps using fuel reformers
US7051521B2 (en) * 2004-02-02 2006-05-30 Hino Motors, Ltd. Exhaust aftertreatment system
US20060137329A1 (en) * 2004-12-28 2006-06-29 Caterpillar Inc. Filter desulfation system and method
US20060191254A1 (en) * 2005-02-28 2006-08-31 Caterpillar Inc. Exhaust gas mixing system
US20060254258A1 (en) * 2002-09-05 2006-11-16 Blakeman Philip G Exhaust system for lean burn ic engines
US20060260297A1 (en) * 2005-05-19 2006-11-23 Koch Calvin K Exhaust aftertreatment system and method of use for lean burn internal combustion engines
US20080016849A1 (en) * 2006-07-21 2008-01-24 Eaton Corporation Fuel injection before turbocharger
US20080022663A1 (en) * 2006-07-26 2008-01-31 Dodge Lee G System and method for dispensing an aqueous urea solution into an exhaust gas stream

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097665A (en) * 1988-11-01 1992-03-24 Kammel Refaat A Flattened profile diesel engine exhaust oxidizer
US6004520A (en) * 1995-12-13 1999-12-21 Daimler-Benz Ag Method for operating a purification device, a purification device and use of the same
US6125629A (en) * 1998-11-13 2000-10-03 Engelhard Corporation Staged reductant injection for improved NOx reduction
US6680037B1 (en) * 1999-07-08 2004-01-20 Johnson Matthey Public Limited Company Device and method for removing sooty particulate from exhaust gases from combustion processes
US6314722B1 (en) * 1999-10-06 2001-11-13 Matros Technologies, Inc. Method and apparatus for emission control
US6729127B2 (en) * 2000-08-30 2004-05-04 J. Eberspächer GmbH & Co. KG Exhaust cleaning system for motor vehicles, especially diesel-powered utility vehicles
US20020062641A1 (en) * 2000-11-30 2002-05-30 Nissan Motor Co., Ltd. Exhaust gas purification apparatus and method
US6655133B2 (en) * 2001-03-29 2003-12-02 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifier for internal combustion engine
US6708484B2 (en) * 2001-04-03 2004-03-23 Nissan Motor Co., Ltd. Exhaust gas purifying system
US6722124B2 (en) * 2001-06-01 2004-04-20 Nelson Burgess Limited Catalytic converter
US6679052B2 (en) * 2001-07-31 2004-01-20 Toyota Jidosha Kaisha Emission control apparatus
US20030140622A1 (en) * 2002-01-25 2003-07-31 William Taylor Combination emission abatement assembly and method of operating the same
US20060254258A1 (en) * 2002-09-05 2006-11-16 Blakeman Philip G Exhaust system for lean burn ic engines
US20050013756A1 (en) * 2003-05-28 2005-01-20 Kiyoshi Amou Engine exhaust gas treatment system and exhaust gas treatment process
US6883311B2 (en) * 2003-07-02 2005-04-26 Detroit Diesel Corporation Compact dual leg NOx absorber catalyst device and system and method of using the same
US7051521B2 (en) * 2004-02-02 2006-05-30 Hino Motors, Ltd. Exhaust aftertreatment system
US20050274104A1 (en) * 2004-06-15 2005-12-15 Leslie Bromberg Optimum regeneration of diesel particulate filters and NOx traps using fuel reformers
US20060137329A1 (en) * 2004-12-28 2006-06-29 Caterpillar Inc. Filter desulfation system and method
US20060191254A1 (en) * 2005-02-28 2006-08-31 Caterpillar Inc. Exhaust gas mixing system
US20060260297A1 (en) * 2005-05-19 2006-11-23 Koch Calvin K Exhaust aftertreatment system and method of use for lean burn internal combustion engines
US20080016849A1 (en) * 2006-07-21 2008-01-24 Eaton Corporation Fuel injection before turbocharger
US20080022663A1 (en) * 2006-07-26 2008-01-31 Dodge Lee G System and method for dispensing an aqueous urea solution into an exhaust gas stream

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9180407B2 (en) 2008-12-17 2015-11-10 Donaldson Company, Inc. Flow device for an exhaust system
US9925502B2 (en) 2008-12-17 2018-03-27 Donaldson Company, Inc. Flow device for an exhaust system
US8505279B2 (en) * 2009-03-26 2013-08-13 GM Global Technology Operations LLC Exhaust gas treatment system including a four-way catalyst and urea SCR catalyst and method of using the same
US20100242438A1 (en) * 2009-03-26 2010-09-30 Gm Global Technology Operations, Inc. Exhaust gas treatment system including a four-way catalyst and urea scr catalyst and method of using the same
US8555617B2 (en) 2009-03-26 2013-10-15 GM Global Technology Operations LLC Exhaust gas treatment system including a four-way catalyst and urea SCR catalyst and method of using the same
US20100242448A1 (en) * 2009-03-26 2010-09-30 Gm Global Technology Operations, Inc. Exhaust gas treatment system including a four-way catalyst and urea scr catalyst and method of using the same
US20110047970A1 (en) * 2009-09-01 2011-03-03 Cummins Intellectual Properties, Inc. HIGH EFFICIENCY NOx REDUCTION SYSTEM AND METHOD
US8277548B2 (en) 2009-09-25 2012-10-02 Tenneco Automotive Operating Company Inc. Combined exhaust gas aftertreatment/air cleaner dust and ejector unit
US20110072807A1 (en) * 2009-09-25 2011-03-31 Chris Kleinfeld Combined Exhaust Gas Aftertreatment/Air Cleaner Dust and Ejector Unit
CN102510934A (en) * 2009-09-25 2012-06-20 坦尼科汽车营业公司 Combined exhaust gas aftertreatment/air cleaner dust and ejector unit
WO2011037996A1 (en) * 2009-09-25 2011-03-31 Tenneco Automotive Operating Company, Inc. Combined exhaust gas aftertreatment/air cleaner dust and ejector unit
US9810126B2 (en) 2010-01-12 2017-11-07 Donaldson Company, Inc. Flow device for exhaust treatment system
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
WO2012044731A2 (en) * 2010-09-30 2012-04-05 Electro-Motive Diesel, Inc. Turbocharger mixing manifold for an exhaust aftertreatment system for a locomotive having a two-stroke locomotive diesel engine
US8938950B2 (en) 2010-09-30 2015-01-27 Electro-Motive Diesel, Inc. Turbocharger mixing manifold for an exhaust aftertreatment system for a locomotive having a two-stroke locomotive diesel engine
WO2012044731A3 (en) * 2010-09-30 2012-06-07 Electro-Motive Diesel, Inc. Turbocharger mixing manifold for an exhaust aftertreatment system for a locomotive having a two-stroke locomotive diesel engine
US9518592B2 (en) * 2011-03-22 2016-12-13 Delphi International Operations Luxembourg S.A.R.L. Reagent dosing pump assembly
US20140010640A1 (en) * 2011-03-22 2014-01-09 Delphi Technologies Holding, S.A.R.L. Regeant dosing pump assembly
US20140026540A1 (en) * 2011-03-30 2014-01-30 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Compact exhaust gas treatment unit with mixing region, method for mixing an exhaust gas and vehicle
US9322309B2 (en) * 2011-03-30 2016-04-26 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Compact exhaust gas treatment unit with mixing region, method for mixing an exhaust gas and vehicle
WO2013117230A1 (en) * 2012-02-09 2013-08-15 Toyota Motor Europe Nv/Sa Reduction agent injector
US9458750B2 (en) 2012-04-19 2016-10-04 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9598999B2 (en) 2012-04-19 2017-03-21 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
WO2013156856A3 (en) * 2012-04-19 2014-01-23 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US20130291518A1 (en) * 2012-05-07 2013-11-07 Ajay Patel Exhaust system having a pre-heater
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
CN105134349A (en) * 2015-08-21 2015-12-09 天纳克(苏州)排放系统有限公司 Exhaust gas disposal device

Also Published As

Publication number Publication date Type
KR20090094457A (en) 2009-09-07 application
JP2010513773A (en) 2010-04-30 application
CN101563529A (en) 2009-10-21 application
WO2008076175A2 (en) 2008-06-26 application
CA2667062A1 (en) 2008-06-26 application
DE112007002861T5 (en) 2009-10-22 application
WO2008076175A3 (en) 2008-08-21 application

Similar Documents

Publication Publication Date Title
US20070101703A1 (en) Exhaust emission purifying apparatus for engine
US20100083643A1 (en) Exhaust gas purification apparatus for internal combustion engine
US20080087006A1 (en) Tailpipe exhaust gas mixer and method
US20070193254A1 (en) Combustion engine exhaust after-treatment system incorporating syngas generator
US20110011060A1 (en) Exhaust Cooling Module for SCR Catalysts
US20090000287A1 (en) Exhaust Gas Flow Device
US20060260297A1 (en) Exhaust aftertreatment system and method of use for lean burn internal combustion engines
US20100199645A1 (en) Mixing device for an exhaust system
US20080216470A1 (en) Exhaust Aftertreatment System with Flow Distribution
WO2009024815A2 (en) An exhaust system
US7712305B2 (en) Exhaust aftertreatment system with spiral mixer
US20110219755A1 (en) Exhaust-gas purification system for diesel engines
US20080066451A1 (en) Exhaust treatment packaging apparatus, system, and method
US7856807B2 (en) Flow reversal chambers for increased residence time
US20100146950A1 (en) Exhaust gas purification device
US20110214415A1 (en) Gas/liquid mixing device for diesel exhaust aftertreatment
US8938954B2 (en) Integrated exhaust treatment device having compact configuration
US20070178025A1 (en) Exhaust treatment system
US20050229590A1 (en) Exhaust gas system
US20130111886A1 (en) Electronically Heated NOx Adsorber Catalyst
US20090235653A1 (en) Particulate matter filter assembly with a flow device
WO2012110720A1 (en) Assembly for post-treating the exhaust gases of a supercharged combustion engine, and motor vehicle comprising such an assembly
JP2010031779A (en) Exhaust emission control device
US20110083428A1 (en) Scr mixer
US20080141662A1 (en) Fluid injecting and mixing systems for exhaust after-treatment devices

Legal Events

Date Code Title Description
AS Assignment

Owner name: TENNECO AUTOMOTIVE OPERATING COMPANY INC., ILLINOI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHUSTER, MARKUS;GOMULKA, TED G.;HAVERKAMP, SASCHA;REEL/FRAME:019997/0735;SIGNING DATES FROM 20070913 TO 20070918