US20030221424A1 - Exhaust cleaning system - Google Patents

Exhaust cleaning system Download PDF

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Publication number
US20030221424A1
US20030221424A1 US10464534 US46453403A US2003221424A1 US 20030221424 A1 US20030221424 A1 US 20030221424A1 US 10464534 US10464534 US 10464534 US 46453403 A US46453403 A US 46453403A US 2003221424 A1 US2003221424 A1 US 2003221424A1
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Application
Patent type
Prior art keywords
housing
exhaust
catalytic converter
particle filter
cleaning system
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
US10464534
Inventor
Siegfried Woerner
Peter Zacke
Thomas Hauber
Rudolf Buhmann
Marcus Werni
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
Eberspaecher Climate Control Systems GmbH and Co KG
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    • 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
    • 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/0232Exhaust 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 removing incombustible material from a particle filter, e.g. ash
    • 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/0233Exhaust 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
    • 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/025Exhaust 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 using fuel burner or by adding fuel to exhaust
    • 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/033Exhaust 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
    • F01N3/0335Exhaust 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 exhaust silencers 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
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/033Exhaust 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
    • F01N3/035Exhaust 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
    • 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
    • F01N3/28Construction of catalytic reactors
    • 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2882Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers 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
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/24Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N13/14Exhaust 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
    • 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
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/18Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
    • 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
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/02Tubes being perforated
    • 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
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/18Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • 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
    • F01N2490/00Structure, disposition or shape of gas-chambers
    • F01N2490/16Chambers with particular shapes, e.g. spherical
    • 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
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12Hydrocarbons
    • 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
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14Nitrogen 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
    • 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
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2892Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection
    • Y02A50/20Air quality improvement or preservation
    • Y02A50/23Emission reduction or control
    • Y02A50/232Catalytic converters
    • Y02A50/2322Catalytic converters for exhaust after-treatment of internal combustion engines in vehicles
    • Y02A50/2325Selective Catalytic Reactors [SCR]
    • 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

Abstract

An exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles. The exhaust cleaning system has an exhaust muffler (1), a catalytic converter (2) and an exhaust particle filter element (3). The exhaust muffler (1), the catalytic converter (2) with a U-shaped tubular urea injection element (4) arranged upstream and an exhaust particle filter element (3) are integrated in a common housing and designed as a structural, functional unit.

Description

    RELATED APPLICATION
  • This application is a continuation of application Ser. No. 09/930,555 filed Aug. 15, 2001.[0001]
  • FIELD OF THE INVENTION
  • The present invention pertains to an exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles, with an exhaust muffler, catalytic converter and exhaust gas particle filter element. [0002]
  • BACKGROUND OF THE INVENTION
  • Diesel exhaust cleaning systems for utility vehicles of the above-mentioned type, in which the catalytic converter, the exhaust gas particle filter element, and one or more exhaust mufflers are arranged in the exhaust line of the utility vehicle behind the diesel engine, have been known according to the state of the art. The functions for muffling, HC/NOx reduction as well as soot particle reduction are assumed by individual, separate components of the exhaust system. The individual components require a relatively large space for mounting. In addition, depending on the weathering conditions, the individual components are subject to varying thermal stress and corrosion-promoting conditions, which compromise the service life. In addition, the mounting of the exhaust system is difficult. [0003]
  • SUMMARY AND OBJECTS OF THE INVENTION
  • Based on the above-mentioned general state of the art, the object of the present invention is to provide an exhaust cleaning system of the type mentioned in the introduction, which is characterized by an especially compact design and nevertheless efficiently and reliably assumes the functions of sound muffling, HC/NOx reduction and particle reduction with simple means. [0004]
  • According to the invention, an exhaust cleaning system is provided for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles, with exhaust muffler, catalytic converter and exhaust gas particle filter element. The exhaust muffler, the exhaust gas particle filter element, and the catalytic converter are integrated in a common housing and form a structural, functional unit. [0005]
  • The exhaust muffler of a multichamber design with at least one baffle chamber and at least one absorption chamber in a common housing advantageously has an outer jacket with an oval to rectangular cross section and flat front-side axial ends, wherein the baffle chamber(s) and the absorption chamber(s) are separated from one another by at least one radial partition. [0006]
  • The catalytic converter is preferably an SCR catalytic converter for the selective catalytic reduction of the harmful substances present in the exhaust gas. [0007]
  • The exhaust gas particle filter element is preferably a diesel particle filter element. [0008]
  • In particular, the SCR catalytic converter, the diesel particle filter element, and a U-shaped tubular urea injection element are provided in the housing in the axial direction, extending over the chambers and essentially in parallel to one another. [0009]
  • In a special variant, the housing is divided by at least three radial partitions located at spaced locations from one another into at least four chambers, wherein the first partition between the first chamber and the second chamber, the second partition between the second chamber and the third chamber, as well as the third partition between the third chamber and the fourth chamber have passage openings for the fastened mounting of the SCR catalytic converter, the diesel particle filter element as well as the U-shaped tubular element. [0010]
  • The diesel particle filter element advantageously comprises a connection flange, to which a diesel burner is detachably fastened on the outside of the housing, wherein the connection flange is located and fastened in the plane of the first front-side axial end of the housing, which axial end is associated with the first chamber and limits the first chamber together with the first partition in the axial direction. [0011]
  • In the area of the other, second front-side axial end of the housing, the diesel particle filter element may have a conical cleaning bell with a blind plug that can be opened at the tapered end of the cleaning bell, the tapered end of the cleaning bell including the blind plug being located in the plane of the second front-side axial end of the housing. [0012]
  • Furthermore, the diesel particle filter element may have a first jacket perforation or opening in the area of the third chamber for the radially outwardly directed passage of the exhaust gas. [0013]
  • The diesel particle filter element preferably has a radial exhaust gas inlet in the area of the first chamber, an exhaust gas inlet pipe being provided on the housing jacket side. [0014]
  • With reference to the urea injection, the exhaust cleaning system comprises especially a U-shaped tubular element with a short straight tube section with an axial exhaust gas inlet in the area of the third chamber and a longer straight tube section with an axial exhaust gas outlet in the area of the fourth chamber, as well as a 180° elbow section in the area of the first chamber, wherein a straight urea feed pipe aligned with the axis of the longer tube section opens into the 180° elbow section approximately in the extension of the above-mentioned axis of the longer tube section, and the elbow section extends at least to the first axial end of the housing. [0015]
  • The short and long straight tube sections extend especially in parallel to one another at the same level of the housing. [0016]
  • The shorter straight tube section may have a jacket perforation in the area of the second chamber. [0017]
  • The SCR catalytic converter preferably comprises an axially directed, hollow exhaust gas outlet housing part in the area of the first chamber, while the catalytic converter core is located in the area of the fourth, third and second chambers. [0018]
  • In the area of the first chamber, the exhaust gas outlet housing part of the catalytic converter preferably has a jacket-side exhaust gas outlet opening, to which a tube elbow is connected, which leads to the first axial end of the housing and forms the exhaust gas outlet of the exhaust muffler. [0019]
  • The hollow exhaust gas outlet housing part may have a jacket perforation and a frontside perforation in the area of the first front-side axial end. [0020]
  • The housing of the catalytic converter core is preferably provided with stiffening beads. [0021]
  • The SCR catalytic converter comprises a box-shaped housing in a variant having a simple design. [0022]
  • In an especially advantageous variant of the present invention, the SCR catalytic converter and the diesel particle filter element as well as the U-shaped tubular element are embedded in an absorption material in the area of the first and second chambers and the first and second chambers are thus designed as absorption chambers, while the third and fourth chambers are baffle chambers. [0023]
  • A fifth chamber, which is arranged downstream of the fourth chamber, is designed as an absorption chamber and contains a muffler absorption material, is preferably provided at the second front-side axial end of the housing, and the fourth partition has perforations. [0024]
  • A compact system with the integrated functional modules muffling, NOx reduction and particle reduction is created by the present invention with minimal volume and at low manufacturing costs. The compact system is especially suitable for medium to heavy diesel-powered utility vehicles. The compact system also meets more stringent emission regulations. In conjunction with the muffling of the exhaust noise, the reduction of the three functional components to a single functional component is performed in a combined system. [0025]
  • The compact system for the aftertreatment of the pollutant components HC/NOx/particles and muffling is characterized especially by [0026]
  • muffing/NOx reduction/particle reduction by the integration of the three functional elements in a single housing with minimal volume, [0027]
  • a diesel particle filter element with integrated diesel burner, especially for emergency regeneration under extremely cold operating conditions, e.g., during a short urban drive, [0028]
  • an SCR catalytic converter arranged downstream of the diesel particle filter element with upstream urea injection plus mixing element, [0029]
  • the possibility of cleaning the diesel particle filter element by blowing out the ash particles in the rearward direction via the burner connection after removal of the diesel burner and after opening the blind plug, [0030]
  • embedding of the diesel particle filter element and of the SCR catalytic converter in the muffler absorption material, as a result of which there are no heat losses and a very fast LIGHT OFF system and optimal filter regeneration are achieved, [0031]
  • optimal mixing of the urea by means of a special mixing element, e.g., an inserted flow coil, a semicircular flow loop and/or by means of a mixing nozzle. [0032]
  • The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which a preferred embodiment of the invention is illustrated.[0033]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the drawings: [0034]
  • FIG. 1 is a schematic vertical axial sectional view of a combined exhaust cleaning system for a heavy diesel-powered utility vehicle in the form of an exhaust muffler of multichamber design with catalytic converter, diesel particle filter element and U-shaped tubular urea injection element; [0035]
  • FIG. 2 is a schematic front view of the exhaust cleaning element according to FIG. 1 looking in the direction of line A-A in FIG. 1, with the diesel burner not shown; [0036]
  • FIG. 3 is a schematic horizontal sectional view of the exhaust cleaning system according to FIGS. 1 and 2 taken along line B-B in FIG. 2; and [0037]
  • FIG. 4 is a schematic top view of the U-shaped tubular urea injection element of the exhaust cleaning system similar to FIG. 3 with the diesel particle filter element not shown.[0038]
  • DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Referring to the drawings in particular, an exhaust cleaning system in the form of a diesel exhaust gas cleaning system for heavy utility vehicles comprises three functional elements, namely, an exhaust muffler [0039] 1 for muffling the exhaust noise, an SCR catalytic converter 2 for the selective catalytic HC/NOx reduction with upstream urea injection through a U-shaped tubular urea injection element 4, as well as an exhaust gas particle filter element 3 for reducing the exhaust particles by filtering out soot particles and the like, and optionally afterburning or emergency regeneration by means of a connected diesel burner 10.
  • The exhaust muffler [0040] 1, the exhaust particle filter element 3, and the catalytic converter are integrated in a common housing and form a structural, functional unit.
  • The exhaust muffler [0041] 1 has a multichamber design with two baffle chambers and three absorption chambers in a common housing with an outer jacket of an oval to rectangular cross section and with flat front-side axial ends 15, 18. The two baffle chambers and the three absorption chambers are separated from one another by radial partitions.
  • The SCR catalytic converter [0042] 2, the diesel particle filter element 3 and the U-shaped tubular urea injection element 4 are provided in the housing extending in the axial direction, especially extending over the chambers and in parallel to one another.
  • The SCR catalytic converter [0043] 2 is located in the housing at the top, the diesel particle filter element 3 in the middle, and the U-shaped tubular element 4 at the bottom.
  • The housing is divided especially by four radial partitions [0044] 5, 6, 7, 8 located at spaced locations from one another into five chambers I, II, III, IV, and V. The first partition 5 is located between the first chamber I and the second chamber II. The second partition 6 is located between the second chamber II and the third chamber III. The third partition 7 is located between the third chamber III and the fourth chamber IV. The partitions 5, 6 and 7 have passage openings for the fastened mounting of the SCR catalytic converter 2, the diesel particle filter element 3 as well as the U-shaped tubular element 4.
  • The diesel particle filter element [0045] 3 comprises a connection flange 9, to which the diesel burner 10 is detachably fastened on the outside of the housing, where the fastening flange is located and fastened in the plane of the first front-side axial end 15 of the housing. The axial end 15 is associated with the first chamber I and limits the first chamber I together with the first partition 5 in the axial direction.
  • In the area of the other, second front-side axial end [0046] 18 of the housing, the diesel particle filter element 3 has a conical cleaning bell 16 with a blind plug 17 that can be opened at the tapered end of the cleaning bell 16. The tapered end of the cleaning bell including the blind plug is located in the plane of the second front-side axial end 18 of the housing. When the exhaust cleaning system is not in operation, the diesel particle filter element can be cleaned by blowing out the ash particles in the rearward direction in the direction of arrow P (see FIG. 3) after removal of the diesel burner and after opening the blind plug of the cleaning bell.
  • The diesel particle filter element [0047] 3 also has a first jacket perforation 19 in the area of the third chamber III for the radially outwardly directed passage of the exhaust gas.
  • The diesel particle filter element [0048] 3 also has a radial exhaust inlet in the area of the first chamber I, an exhaust inlet pipe 20 being provided on the housing jacket side.
  • The U-shaped tubular element [0049] 4 has a short straight tube section 21 with an axial exhaust inlet 22 in the area of the third chamber III and a longer straight tube section 23 with an axial exhaust outlet 24 in the area of the fourth chamber IV, as well as a 180° elbow section 25 in the area of the first chamber I, wherein a straight urea feed pipe 11 aligned essentially with the axis 32 of the longer tube section 23 opens into the 180° elbow section 25 approximately in the extension of the axis 32, the elbow section 25 extending at least to the first axial end 15 of the housing and being provided with a mixing nozzle. As a result, chemically relatively corrosive urea can be injected centrally into the longer tube section 23 away from the tube wall, and the urea will then be converted into ammonia, which is needed for the exhaust gas treatment in the downstream SCR catalytic converter.
  • The short and long straight tube sections [0050] 21, 23 extend in parallel to one another at the same level of the housing.
  • The shorter straight tube section [0051] 21 has a jacket perforation 33 in the area of the second chamber II.
  • In the area of the first chamber I, the SCR catalytic converter [0052] 2 comprises on the outside an axially aligned hollow exhaust gas outlet housing part 26, while the catalytic converter core 27 is located in the area of the fourth, third and second chambers IV, III and II.
  • The exhaust gas outlet housing part [0053] 26 of the SCR catalytic converter 2 has, in the area of the first chamber I, a jacket-side exhaust gas outlet opening 28, to which a 90° elbow tube 29 is connected. The elbow tube 29 leads to the first axial end 15 of the housing and forms the exhaust gas outlet of the exhaust muffler 1.
  • The hollow exhaust gas outlet housing part [0054] 26 also has a jacket perforation 30 and a front-side perforation 31, which faces the first front-side axial end 15 of the housing.
  • The housing of the catalytic converter [0055] 2 has stiffening beads 34 in the area of the catalytic converter core 27 and has a box-shaped design.
  • The SCR catalytic converter [0056] 2 and the diesel particle filter element 3 as well as the U-shaped tubular element 4 are embedded in an absorption material in the area of the first and second chambers I and II and the first and second chambers I and II are thus designed as absorption chambers, while the third and fourth chambers III, IV are baffle chambers.
  • The above-mentioned fifth chamber V is an absorption chamber and is filled as such with a muffler absorption material. It is located especially at the second front-side axial end [0057] 18 of the housing and is arranged downstream of the fourth chamber IV and is limited axially by the fourth partition 8, which is provided with perforations.
  • While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles. [0058]

Claims (8)

    What is claimed is:
  1. 1. An exhaust cleaning system comprising:
    a housing having an inlet and outlet;
    an exhaust muffler arranged in said housing;
    a catalytic converter arranged in said housing;
    an exhaust gas particle filter element arranged in said housing, said particle filter and said catalytic converter being formed as separate structures in said housing, said muffler, said catalytic converter and said particle filter being in communication with said inlet and said outlet of said housing, said housing including passages serially connecting said catalytic converter and said particle filter with said inlet and said outlet of said housing, said passages forming absorption and baffle chambers of said muffler.
  2. 2. An exhaust cleaning system in accordance with claim 1, wherein:
    said exhaust muffler has a multichamber design with at least one baffle chamber and at least one absorption chamber in said housing, said housing having an outer jacket of oval to rectangular cross section and flat axial ends, said baffle chamber and said absorption chamber being separated from one another by at least one radial partition.
  3. 3. An exhaust cleaning system in accordance with claim 1, wherein:
    said catalytic converter is a selective catalytic reduction (SCR) catalytic converter for the selective catalytic reduction of the harmful substances present in the exhaust gas, said catalytic converter is also a separate structure from said particle filter.
  4. 4. The exhaust cleaning system in accordance with claim 3, wherein said SCR catalytic converter has a box-shaped housing.
  5. 5. An exhaust cleaning system in accordance with claim 1, wherein:
    said exhaust gas particle filter element is a diesel particle filter element.
  6. 6. An exhaust cleaning system in accordance with claim 5, wherein:
    said diesel particle filter element has a conical cleaning bell in an area of an axial end of said housing, with said conical cleaning bell having a blind plug that can be opened at a tapered end of said cleaning bell, wherein said tapered end of said cleaning bell including said blind plug is located substantially in a plane of said axial end of said housing.
  7. 7. An exhaust cleaning system in accordance with claim 1, wherein:
    said particle filter and said catalytic converter form an exclusive passage between said inlet and said outlet.
  8. 8. An exhaust cleaning system in accordance with claim 1, wherein:
    one of said passages is between said particle filter and said catalytic converter.
US10464534 2000-08-30 2003-06-18 Exhaust cleaning system Abandoned US20030221424A1 (en)

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DE2000142542 DE10042542A1 (en) 2000-08-30 2000-08-30 Emission control system for motor vehicles, especially diesel commercial vehicles
DEDE10042542.9 2000-08-30
US09930555 US6729127B2 (en) 2000-08-30 2001-08-15 Exhaust cleaning system for motor vehicles, especially diesel-powered utility vehicles
US10464534 US20030221424A1 (en) 2000-08-30 2003-06-18 Exhaust cleaning system

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US6729127B2 (en) 2004-05-04 grant
EP1184543A2 (en) 2002-03-06 application
DE10042542A1 (en) 2002-03-14 application
EP1184543A3 (en) 2004-01-07 application
US20020023435A1 (en) 2002-02-28 application
EP1184543B1 (en) 2007-09-12 grant
DE50112993D1 (en) 2007-10-25 grant

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