WO2015135619A1 - Dispositif de post-traitement de gaz d'échappement, système de post-traitement de gaz d'échappement, moteur à combustion interne et véhicule automobile - Google Patents

Dispositif de post-traitement de gaz d'échappement, système de post-traitement de gaz d'échappement, moteur à combustion interne et véhicule automobile Download PDF

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Publication number
WO2015135619A1
WO2015135619A1 PCT/EP2015/000277 EP2015000277W WO2015135619A1 WO 2015135619 A1 WO2015135619 A1 WO 2015135619A1 EP 2015000277 W EP2015000277 W EP 2015000277W WO 2015135619 A1 WO2015135619 A1 WO 2015135619A1
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WO
WIPO (PCT)
Prior art keywords
exhaust
exhaust aftertreatment
exhaust gas
aftertreatment device
housing part
Prior art date
Application number
PCT/EP2015/000277
Other languages
German (de)
English (en)
Inventor
Tillmann Braun
Robert Banek
Frank Duvinage
Alexander MACKENSEN
Original Assignee
Daimler Ag
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
Application filed by Daimler Ag filed Critical Daimler Ag
Publication of WO2015135619A1 publication Critical patent/WO2015135619A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Exhaust aftertreatment device exhaust aftertreatment system
  • the invention relates to an exhaust aftertreatment device according to the preamble of claim 1, an exhaust aftertreatment system according to the preamble of claim 6, an internal combustion engine according to claim 8 and a motor vehicle according to claim 9.
  • German Offenlegungsschrift DE 10 2012 009 940 A1 discloses an exhaust aftertreatment system which has an exhaust aftertreatment device, which is preferably designed as an oxidation catalyst, and an exhaust aftertreatment device downstream of the exhaust aftertreatment device, viewed in the flow direction of the exhaust gas.
  • the exhaust aftertreatment device has a housing in which two exhaust gas aftertreatment elements, namely preferably a particle filter and a catalytic converter (SCR catalyst) arranged for a selective catalytic reduction, are arranged.
  • SCR catalyst catalytic converter
  • the particulate filter is both upstream of the SCR catalyst and - seen in the direction of travel of the exhaust aftertreatment system having motor vehicle - in front of this.
  • the invention is therefore based on the object to provide an exhaust gas aftertreatment device, which does not have the disadvantages mentioned. Furthermore, the invention has the object, an exhaust aftertreatment system, an internal combustion engine and to create a motor vehicle, in which also the disadvantages mentioned do not occur.
  • the object is achieved by an exhaust aftertreatment device with the
  • Characteristics of claim 1 is created. This is characterized in that a first exhaust aftertreatment element is arranged in a first housing part, wherein a second exhaust aftertreatment element is arranged in a second housing part, and wherein the first housing part is partially received and guided in the second housing part.
  • the housing as a whole is constructed neither monolithically nor as a rigid composite of various joined parts, but rather due to the inclusion and guidance of a portion of the first housing part in the second housing part at least by the action of a certain, preferably a predetermined upper limit force, telescoped and thus in its length changeable. It is therefore possible in an impact situation, that the first housing part is further hineinverlagert into the second housing part, whereby the length of the
  • Exhaust after-treatment device is reduced. Thus, this does not block building. Furthermore, it can absorb impact energy during the relative displacement of the first housing part into the second housing part, so that it acts to absorb energy. The reduction in length also mitigates the risk that the exhaust aftertreatment device itself penetrates into a vehicle interior or pushes other elements into it.
  • first and also the second housing part are cylindrically symmetrical, preferably circular-cylindrical. But there are also other, in particular of the circular cross-sectional geometry deviating configurations possible,
  • An inner diameter or another suitable inner dimension of the second housing part is preferably matched to an outer diameter or another suitable outer dimension of the first housing part such that the first housing part is guided in the second housing part by abutment of its outer circumferential surface on an inner peripheral surface of the second housing part.
  • a difference between an inner radius of the first housing part and an outer radius of the second housing part is equal to the sum of the
  • Wall thicknesses of housing shells of the housing parts so that there is a secure guide under investment for the first housing part in the second housing part.
  • a defined displacement force is specified on the radii difference, for example by the inner radius of the second housing part and the Outer radius of the first housing part are matched to one another such that there is a press fit with a defined pressing force.
  • the first housing part and the second housing part preferably have a common longitudinal axis, which coincide in the assembled state of the two housing parts, thus forming a common, coaxial longitudinal axis.
  • the relative displacement of the two housing parts takes place in the event of an impact, and the length reduction of the exhaust gas aftertreatment device accordingly takes place.
  • the first housing part and / or the second housing part has / have a jacket made of sheet metal, in particular of sheet metal, preferably of a
  • Thin sheet material is formed.
  • the exhaust aftertreatment device is a wall thickness of the shell of the first housing part and / or the shell of the second housing part of at least 0.5 mm to at most 1, 5 mm, preferably 1 mm.
  • the first housing part and the second housing part are preferably connected to one another in a gastight manner.
  • a clamp connection with a clamp connecting the first housing part and the second housing part is provided for this purpose.
  • the first and the second housing part are integrally connected to one another, in particular by welding or soldering.
  • An adhesive bond is also possible, as far as it is ensured that it survives the typically occurring exhaust gas temperatures in the area of the exhaust aftertreatment device permanently non-destructive.
  • first and the second housing part are frictionally connected to each other, preferably braced together. It is also possible for an interference fit to be realized in such a way via the difference in radius that the two housing parts are connected to one another in a gastight manner. Also, a sheet metal connection with reduced wall thickness in the sense of a predetermined breaking point is possible.
  • a predetermined lower limit for a longitudinally acting Defined deformation force the exhaust aftertreatment device is compressed when force above this critical force level.
  • the gas-tight connection between the housing parts is destroyed, and it comes to the already described Relativverlagerung. If, on the other hand, forces are introduced into the housing, viewed in the longitudinal direction, which remain below the critical force level, the gas-tight connection is stable, so that neither leaks nor deformation of the exhaust gas aftertreatment device occurs. This shows that even the destruction of the gas-tight connection requires energy, which is taken from the impact energy and thus absorbed.
  • frictional forces preferably occur, which likewise contribute to an absorption of impact energy.
  • the gas-tight connection is preferably designed such that the predetermined lower limit for the in
  • Longitudinal deformation force is at least 30 kN to at most 40 kN, preferably 35 kN. Impact tests have shown that these values have suitable limits in terms of minimizing the introduction of force into the
  • An exemplary embodiment of the exhaust gas aftertreatment device is preferred, which is characterized in that the first exhaust gas aftertreatment element has a first substrate, wherein the second exhaust gas aftertreatment element has a second substrate.
  • the first substrate has a higher rigidity than the second substrate. If, in the event of an impact, the first housing part is displaced into the second housing part under compression of the exhaust gas aftertreatment device, at the same time the first substrate is forced against the second substrate. Because the first substrate has a higher rigidity than the second, in this case the second substrate is deformed in a defined manner by the first substrate, in particular upset. In addition, impact energy is absorbed and converted into deformation work of the second substrate.
  • the first substrate comprises silicon carbide (SiC), preferably consists of silicon carbide, or is formed as a silicon carbide substrate.
  • the second substrate preferably has at least one structured metal foil, preferably a plurality of structured metal foils.
  • the second substrate preferably consists of structured metal foils. These are preferably designed and arranged such that turbulences are generated in the exhaust gas flowing through the substrate.
  • the second substrate is as Metalit ® -Katalysatorsubstrat educated. If the second substrate has structured metal foils, they can easily be deformed, in particular compressed, in an impact by the much stiffer, first silicon carbide substrate.
  • An exemplary embodiment of the exhaust gas aftertreatment device is also preferred, which is characterized in that the first exhaust gas aftertreatment element is designed as a diesel particle filter, wherein the second exhaust gas aftertreatment element is designed as an SCR catalytic converter.
  • the first exhaust gas aftertreatment element additionally has an SCR catalyst coating, so that it has a total of so-called SDPF particle filter with selectively catalytically active
  • the first exhaust gas aftertreatment element is designed as a particle filter, in particular as an SDPF particle filter, wherein the first substrate is formed as a silicon carbide substrate.
  • the second exhaust gas aftertreatment element is preferably designed as an SCR catalytic converter, wherein the second substrate has structured metal foils that are set up for SCR catalysis, in particular provided with an SCR coating.
  • the advantage here is that the coating for the particulate filter, in particular the SDPF particulate filter, can easily be applied to the silicon carbide substrate, wherein an SCR coating can readily be applied to a substrate made of structured metal foils.
  • an embodiment of the exhaust aftertreatment device is preferred in which the first exhaust aftertreatment element is designed as an SCR catalyst, wherein the second exhaust aftertreatment element as a diesel particulate filter, preferably with additional SCR catalyst coating is formed.
  • the reverse configuration to the embodiment described above is realized.
  • An exemplary embodiment of the exhaust gas aftertreatment device is also preferred, which is characterized in that the second exhaust gas aftertreatment element is brazed to the second housing part.
  • the second exhaust aftertreatment element is soldered to the inner circumferential surface of the shell of the second housing part.
  • a direct connection between the second exhaust aftertreatment element and the jacket is provided.
  • a mat is arranged, through which the substrate is spaced from the shell.
  • An outer diameter of the substrate is thereby smaller by twice the thickness of the mat than the inner diameter of the jacket.
  • Will the second exhaust aftertreatment element soldered to the second housing part eliminates the mat, so that the outer diameter of the second exhaust aftertreatment element or the substrate thereof substantially corresponds to the inner diameter of the shell.
  • the second exhaust gas aftertreatment element is not soldered over its entire length with the second housing part, so that the solder connection - seen in the longitudinal direction of the second housing part - does not extend over the entire longitudinal extent of the second exhaust aftertreatment element.
  • This embodiment is used in particular to unacceptably high tensions between the second
  • a defined strength of the same can be set by means of a specific tuning of the length of the solder joint, so that a defined lower limit results for a force acting in the longitudinal direction, above which the solder joints between the second exhaust gas aftertreatment element and the second housing part is destroyed. In this way it is possible in an impact, additional impact energy by tearing the second
  • a shortened in the longitudinal direction solder joint is preferably effected in that at least one edge region of the second exhaust aftertreatment element remains free of the solder joint. Preferably, on both sides edge regions of the second remain
  • the first exhaust aftertreatment element is mounted in a preferred embodiment of the exhaust aftertreatment device on a mat, by which it is spaced from an inner peripheral surface of the first housing part and preferably also thermally insulated.
  • the housing of the exhaust gas aftertreatment device preferably has a
  • Rib structure which additionally reduces its stiffness - seen in the longitudinal direction - facilitates deformation of the housing in an impact and absorbs additional impact energy during deformation.
  • Characteristics of claim 6 is created. This has an exhaust gas aftertreatment device and is characterized by an exhaust gas aftertreatment device according to one of the previously described embodiments.
  • the exhaust aftertreatment device is with the exhaust aftertreatment device for
  • an exemplary embodiment of the exhaust aftertreatment system is preferred, in which the exhaust aftertreatment device in the mounted state is oriented substantially perpendicular, preferably perpendicular, to the exhaust gas aftertreatment device.
  • the exhaust gas aftertreatment device in the mounted state, is arranged approximately vertically in an engine compartment of a motor vehicle, wherein the exhaust aftertreatment device is arranged approximately horizontally, preferably horizontally in the engine compartment and preferably behind the exhaust aftertreatment device, viewed in the direction of travel.
  • Aftertreatment device is arranged, resulting in a deflection of approximately 90 ° for the exhaust gas flow. This favors an energy-consuming kinking of an exhaust pipe element, which the exhaust aftertreatment device with the
  • the arrangement of the exhaust gas aftertreatment device horizontally in the engine compartment and preferably along a longitudinal extension of the motor vehicle favors absorption of absorption energy by the exhaust gas aftertreatment device in the event of a frontal impact, in particular in the event of an offset frontal impact
  • An exhaust aftertreatment system is also preferred, which is characterized in that the exhaust aftertreatment device upstream of the exhaust aftertreatment device - as seen in the flow direction of the exhaust gas - is arranged.
  • the exhaust gas aftertreatment device particularly preferably has an oxidation catalytic converter or is designed as an oxidation catalytic converter.
  • the object is also achieved by providing an internal combustion engine having the features of claim 8.
  • This is characterized by an exhaust aftertreatment device according to one of the embodiments described above or by an exhaust aftertreatment system according to one of the embodiments described above. This realizes the advantages that have already been explained in connection with the exhaust aftertreatment device and the exhaust aftertreatment system.
  • the exhaust aftertreatment device is attached to the internal combustion engine and aligned in the longitudinal direction thereof.
  • This is on the one hand thermally particularly favorable, on the other favors the orientation of the exhaust aftertreatment device in the longitudinal direction of the internal combustion engine whose energy absorption by deformation in an impact, especially in a frontal impact. This is especially true when the internal combustion engine is in turn installed in a motor vehicle in the longitudinal direction.
  • an internal combustion engine which is characterized in that the exhaust gas aftertreatment device is arranged geodetically below an exhaust gas turbocharger.
  • the internal combustion engine is arranged longitudinally in an engine compartment, wherein at the same time also attached to the internal combustion engine exhaust gas aftertreatment device in the longitudinal direction and at least approximately horizontally, preferably extending horizontally.
  • the exhaust aftertreatment device is particularly favorable for energy absorption in a frontal impact, in particular an offset frontal impact, with its longitudinal axis is arranged at least parallel to a main axis of force in the event of impact, with particular preference aligned with the main axis of force.
  • the full force introduced by the impact acts on the housing of the exhaust gas aftertreatment device in the direction of its longitudinal axis virtually on impact. In this sense, therefore, a motor vehicle is preferred in which the
  • Exhaust after-treatment device is arranged approximately horizontally, preferably horizontally and particularly preferably aligned in the longitudinal direction.
  • the motor vehicle is preferably designed as a passenger car.
  • the advantages of the exhaust aftertreatment device or of the exhaust aftertreatment system with regard to their impact behavior are realized in a particularly suitable manner.
  • Fig. 1 is a schematic representation of a conventional
  • Fig. 2 is a schematic representation of an embodiment of a
  • Fig. 3 shows the embodiment of Figure 2 in a deformed state
  • Fig. 4 is a schematic representation of an embodiment of a
  • FIG. 1 shows a schematic representation of a known exhaust aftertreatment device according to the prior art.
  • the exhaust gas aftertreatment device 1 has a housing 3, in which at least two exhaust aftertreatment elements are arranged, namely a first exhaust aftertreatment element 5, which is here as a particulate filter, in particular as a diesel particulate filter, preferably with an SCR coating, and a second exhaust aftertreatment element 7, which is designed here as SCR catalyst.
  • the housing 3 is in one piece
  • the exhaust aftertreatment elements 5, 7 are spaced from the housing 3 by mats 9, 11.
  • the second exhaust aftertreatment element 7 comprises a ceramic substrate, in particular a cordierite substrate, which is not or hardly deformable.
  • the first exhaust aftertreatment element 5 preferably has a silicon carbide substrate.
  • FIG. 2 shows a schematic representation of an embodiment of the invention the exhaust aftertreatment device 1. Same and functionally identical
  • the exhaust aftertreatment device 1 here has a first housing part 13 and a second housing part 15.
  • the first housing part 13 is partially, namely in a transition region 17, in the second housing part 15th
  • the two housing parts 13, 15 are preferably connected to each other gas-tight.
  • the end region 19 preferably provided a welding or soldering seam. But it is also a clamp connection or a frictional connection of the housing parts 13, 15 possible.
  • the first housing part 13 and the second housing part 15 each have a jacket 21, 23 which is preferably made of sheet metal, in particular sheet metal, preferably of a
  • the first exhaust aftertreatment element 5 is of an inner
  • Outer diameter is smaller than the inner diameter of the shell 21st
  • the second exhaust aftertreatment element 7 is not stored here in a mat, but lies with its outer peripheral surface 27 directly to an inner peripheral surface 29 of the jacket 23 at. Its outer diameter thus preferably corresponds substantially, particularly preferably exactly, to the inner diameter of the jacket 23. In comparison to the exemplary embodiment illustrated in FIG. 1, in which the mat 11 is provided, the outer diameter of the second exhaust-gas aftertreatment element 7 is in the exhaust-gas aftertreatment device according to FIG increased. If, for the same exhaust aftertreatment performance, a volume of the second exhaust aftertreatment elements 7 in the embodiments according to FIG. 1 on the one hand and FIG. 2 on the other hand are kept the same, it is therefore possible to make the second exhaust aftertreatment element 7 shorter in the exemplary embodiment according to FIG. 2, seen in the longitudinal direction. As a result, the exhaust gas aftertreatment device 1 can be made shorter overall and, for that reason alone, have a lower block-forming effect than is the case in the known exhaust gas aftertreatment device 1 according to FIG.
  • the second exhaust gas aftertreatment element 7 according to FIG. 2 is preferably partially soldered in the region of its abutment with the outer circumferential surface 27 on the inner circumferential surface 29, the solder joint preferably not extending over the entire length of the second exhaust aftertreatment element 7 (seen in the horizontal direction in FIG. 2) , In particular, edge regions are preferably exempted from the soldering. But it is also possible that the second exhaust aftertreatment element 7 is soldered along its entire length with the jacket 23. About the extent of the Solder connection is preferably a tearing force adjustable beyond which the second exhaust aftertreatment element 7 is released from the jacket 23, in particular demolished. In this way, additional impact energy can be absorbed.
  • first exhaust aftertreatment element 5 preferably has a silicon carbide substrate, in the exemplary embodiment illustrated in FIG.
  • the second exhaust aftertreatment element 7 preferably a substrate, which comprises structured metal foils, in particular a Metalit ® substrate.
  • the substrate of the first exhaust aftertreatment element 5 has a higher rigidity than the substrate of the second exhaust aftertreatment element 7. Therefore, in the event of an impact when the first exhaust aftertreatment element 5 is forced onto the second exhaust aftertreatment element 7, the substrate of the second exhaust aftertreatment element 7 will pass through compresses the substrate of the first exhaust aftertreatment element 5, which further impact energy is absorbed by this deformation.
  • FIG. 3 shows the situation after an impact.
  • the connection between the first housing part 13 and the second housing part 15 is torn in the end portion 19, and the first housing part 13 has been displaced into the second housing part 15 inside.
  • the length of the exhaust aftertreatment device 1 and in particular of the housing 3 has been effectively shortened relative to one another by telescoping relative movement of the two housing parts 13, 15 relative to each other.
  • the first exhaust aftertreatment element 5 is pushed onto the second exhaust aftertreatment element 7, which has resulted in its deformation in the longitudinal direction due to the different rigidity of the substrates and in particular by the compressibility of the substrate of the second exhaust aftertreatment element 7. As a result, further impact energy has been absorbed.
  • both substrates of the exhaust aftertreatment elements 13, 15 are destroyed upon impact, whereby additional impact energy is absorbed.
  • FIG. 4 shows a schematic illustration of an exemplary embodiment of an exhaust gas aftertreatment system 31 according to the invention, which has the above-described exhaust gas aftertreatment device 1 according to the invention.
  • Exhaust after-treatment device 33 is provided, which is preferably formed here as an oxidation catalyst, in particular as a diesel oxidation catalyst.
  • the exhaust aftertreatment device 33 is fluidly connected to the exhaust aftertreatment device 1 for passing exhaust gas.
  • the exhaust aftertreatment device 33 is arranged upstream of the exhaust gas aftertreatment device 1, viewed in the flow direction of the exhaust gas.
  • the exhaust aftertreatment system 31 here has a first connection flange 35 for connection to an exhaust line coming from an internal combustion engine, the connection flange 35 particularly preferably serving for connecting the exhaust aftertreatment system 31 to an outlet flange of a turbine of an exhaust gas turbocharger.
  • the exhaust aftertreatment device 33 is fluidly connected to the exhaust aftertreatment device 1 through a connecting line element 37. Downstream of the exhaust aftertreatment device 1 or on this itself, a second connecting flange 39 is arranged, which serves for the connection of the exhaust aftertreatment system 31 with a downstream exhaust gas piping.
  • the exhaust aftertreatment device 33 and the exhaust aftertreatment device 1 are oriented substantially perpendicular to each other. Accordingly, the exhaust gas in the connecting pipe member 37 is deflected by approximately 90 °.
  • the exhaust aftertreatment system 31 is preferably attached directly to an internal combustion engine, wherein it is particularly preferably aligned in the longitudinal direction of the internal combustion engine.
  • it is particularly preferably aligned in the longitudinal direction of the internal combustion engine.
  • in the assembled state extends
  • Exhaust gas aftertreatment device 1 in the longitudinal direction of the internal combustion engine, in particular when it is longitudinally installed in an engine compartment of a motor vehicle.
  • the exhaust aftertreatment device 33 in the mounted state on a motor vehicle is preferably oriented substantially vertically, while the exhaust gas aftertreatment device 1 is oriented substantially horizontally, wherein it preferably extends in the longitudinal direction of the motor vehicle.
  • the longitudinal axis of the exhaust gas aftertreatment device 1 is therefore preferably arranged parallel or even in alignment with the main force axis of the impact.
  • the exhaust gas aftertreatment device 1 and the exhaust aftertreatment system 31 can be arranged compactly in an engine compartment of a motor vehicle, preferably a passenger car, wherein the exhaust aftertreatment device 1 is defined above a critical force level compressed so that it does not block and absorbs impact energy.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un dispositif de post-traitement de gaz d'échappement (1) comprenant un boîtier (3) dans lequel sont disposés deux éléments de post-traitement de gaz d'échappement (5, 7) ou plus. Selon l'invention, le premier élément de boîtier (13) dans lequel est disposé un élément de post-traitement de gaz d'échappement (5) est partiellement logé et guidé dans un second élément de boîtier (15) dans lequel est disposé un second élément de post-traitement de gaz d'échappement (7).
PCT/EP2015/000277 2014-03-14 2015-02-10 Dispositif de post-traitement de gaz d'échappement, système de post-traitement de gaz d'échappement, moteur à combustion interne et véhicule automobile WO2015135619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014003686.3 2014-03-14
DE102014003686.3A DE102014003686A1 (de) 2014-03-14 2014-03-14 Abgasnachbehandlungseinrichtung, Abgasnachbehandlungssystem, Brennkraftmaschine und Kraftfahrzeug

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WO2015135619A1 true WO2015135619A1 (fr) 2015-09-17

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PCT/EP2015/000277 WO2015135619A1 (fr) 2014-03-14 2015-02-10 Dispositif de post-traitement de gaz d'échappement, système de post-traitement de gaz d'échappement, moteur à combustion interne et véhicule automobile

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WO (1) WO2015135619A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019112910A1 (de) * 2019-05-16 2020-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Abgasanlage für eine Brennkraftmaschine

Citations (5)

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US5190732A (en) * 1988-10-11 1993-03-02 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalyst with a double casing system
EP1361347A1 (fr) * 2002-04-22 2003-11-12 J. Eberspächer GmbH & Co. KG Convertisseur catalytique pour un moteur à combustion interne
EP1793100A1 (fr) * 2005-11-30 2007-06-06 Benteler Automotive Corporation Dispositif de traitement de gaz d'échappement avec enceinte isolée thermiquement
EP1887194A1 (fr) * 2006-08-04 2008-02-13 J. Eberspächer GmbH & Co. KG Dispositif de purification de gas d'échappement
US20090084094A1 (en) * 2007-10-02 2009-04-02 Goss James R Exhaust Aftertreatment System with Compliantly Coupled Sections

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Publication number Priority date Publication date Assignee Title
EP0775807B8 (fr) * 1995-05-30 2003-11-05 Nippon Steel Corporation Dispositif de controle de l'emission de polluants dans les gaz d'echappement pour moteurs a combustion interne
DE20200599U1 (de) * 2002-01-16 2002-06-20 Gillet Heinrich Gmbh Vorrichtung zum Reinigen der Abgase von Verbrennungsmotoren
DE202004019176U1 (de) * 2004-12-11 2005-03-17 Gillet Heinrich Gmbh Aus zwei rohrförmigen Gehäuseteilen bestehendes Gehäuse
DE102012009940A1 (de) 2012-05-18 2013-11-21 Daimler Ag Crashtolerante Systemanordnung in einem Kraftfahrzeugmotorraum

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190732A (en) * 1988-10-11 1993-03-02 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalyst with a double casing system
EP1361347A1 (fr) * 2002-04-22 2003-11-12 J. Eberspächer GmbH & Co. KG Convertisseur catalytique pour un moteur à combustion interne
EP1793100A1 (fr) * 2005-11-30 2007-06-06 Benteler Automotive Corporation Dispositif de traitement de gaz d'échappement avec enceinte isolée thermiquement
EP1887194A1 (fr) * 2006-08-04 2008-02-13 J. Eberspächer GmbH & Co. KG Dispositif de purification de gas d'échappement
US20090084094A1 (en) * 2007-10-02 2009-04-02 Goss James R Exhaust Aftertreatment System with Compliantly Coupled Sections

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