EP2261475B1 - Abgasreinigungseinrichtung - Google Patents

Abgasreinigungseinrichtung Download PDF

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Publication number
EP2261475B1
EP2261475B1 EP10163293.3A EP10163293A EP2261475B1 EP 2261475 B1 EP2261475 B1 EP 2261475B1 EP 10163293 A EP10163293 A EP 10163293A EP 2261475 B1 EP2261475 B1 EP 2261475B1
Authority
EP
European Patent Office
Prior art keywords
inlet
outlet
housing part
exhaust gas
bracket
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.)
Active
Application number
EP10163293.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2261475A1 (de
Inventor
Marcus Werni
Wolfgang Datz
Michael Bay
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 Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
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 Eberspaecher Exhaust Technology GmbH and Co KG filed Critical Eberspaecher Exhaust Technology GmbH and Co KG
Publication of EP2261475A1 publication Critical patent/EP2261475A1/de
Application granted granted Critical
Publication of EP2261475B1 publication Critical patent/EP2261475B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—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
    • F01N13/1805—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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes

Definitions

  • the present invention relates to an exhaust gas purification device for an exhaust system of an internal combustion engine, in particular of a motor vehicle.
  • Exhaust gas purification devices are, for example, catalysts and particle filters and combinations thereof.
  • an oxidation catalyst unit and a particle filter unit can be arranged one behind the other, as in document EP 1 312 886 A2 is disclosed.
  • the oxidation catalyst can be implemented in the exhaust gas entrained hydrocarbons.
  • the particulate filter removes particles entrained in the exhaust gas, in particular soot.
  • fuel can be added upstream of the oxidation catalyst, which is reacted exothern on the catalyst.
  • the particle filter arranged downstream thereof can be heated to an ignition temperature at which the soot particles deposited in the filter burn off so as to bring about the regeneration of the particle filter.
  • the oxidation catalyst unit may wear more or less severely. Furthermore, incombustible residues can remain in the particle filter unit, which accumulate more and more over time and gradually clog the respective particle filter. Accordingly, it may be necessary to maintain the respective unit and possibly replace it with a new one. In order to remove the oxidation catalyst unit and / or the particulate filter unit from the common housing, a relatively large effort is required.
  • the present invention is concerned with the problem of an improved embodiment for an exhaust gas purification device of the type mentioned above Specifically, which is characterized in that the accessibility to the respective unit for maintenance purposes and the like is simplified.
  • the invention is based on the general idea of axially fixedly mounting a holder on the particle filter unit and fixing this holder axially on the housing by means of a clamp connection which removably connects at least two axially adjoining housing parts to one another.
  • the already existing clamp connection receives an additional function, since on the one hand fixes the two adjacent housing parts together and on the other hand fixes the holder on the housing.
  • the housing parts are movable relative to each other, while on the other hand, the holder is movable relative to the housing.
  • the particle filter unit can then be taken out of the housing in a particularly simple manner.
  • the clamp connection connects the inlet housing part with the outlet housing part.
  • the coupled with the particulate filter unit holder now cooperates with this one clamp connection so that the holder is axially fixed to the two housing parts.
  • the holder is integrated into the clamp connection, so that automatically takes place by connecting the two housing parts, the desired axial fixation of the particulate filter unit in the housing.
  • the holder for this purpose may have two flanges, which cooperate with complementary flanges of the two housing parts in order to realize the clamp connection.
  • FIG. 1 includes an exhaust gas purification device 1, which may be used in an exhaust system of an internal combustion engine, wherein the internal combustion engine is preferably located in a motor vehicle, a multi-part housing 2, which extends in a longitudinal direction 3.
  • the housing longitudinal direction 3 extends parallel to a longitudinal center axis 4 of the housing 2 and thereby defines an axial direction, which in the following also is denoted by 3. Concerning.
  • the housing 2 contains, in succession, an oxidation catalytic converter unit 5 and, downstream of it, a particle filter unit 6.
  • the housing 2 has an inlet housing part 7, which is equipped with an exhaust gas inlet 8 and in which the oxidation catalyst unit 5 is arranged. Furthermore, the housing 2 has an outlet housing part 9, which has an exhaust gas outlet 10 and into which the particle filter unit 6 protrudes.
  • the exhaust gas inlet 8 can be oriented transversely to the axial direction 3. Additionally or alternatively, the exhaust gas outlet 10 may be oriented transversely to the axial direction 3.
  • the exhaust gas purification device 1 is also equipped with at least one clamp connection 11, by means of which two axially adjacent housing parts are detachably connected to one another. It has the in the FIGS. 1 and 2 shown embodiment, two such clamp connections 11, namely an inlet-side or first clamp connection 11a and an outlet-side or second clamp connection 11b.
  • the inlet-side clamp connection 11 a connects the inlet housing part 7 to a middle housing part 12, which is arranged axially between the inlet housing part 7 and the outlet housing part 9.
  • the outlet-side clamp connection 11b connects the outlet housing part 9 to the middle housing part 12.
  • FIGS FIGS. 3 and 4 another embodiment in which the exhaust gas purification device 1 has only a single clamp connection 11 to connect the inlet housing part 7 with the outlet housing part 9.
  • At least one holder 13 is provided which is axially fixed with respect to the particle filter unit 6.
  • the inlet-side holder 13a and an outlet-side holder 13b are two such holders 13, namely, an inlet-side holder 13a and an outlet-side holder 13b.
  • the shows in the FIGS. 3 and 4 illustrated embodiment only a single bracket 13th
  • the respective holder 13 cooperates with at least one clamp connection 11, in such a way that the respective clamp connection 11 axially fixes the respective holder 13 on the housing 2 or on at least one housing part 7, 9, 12. Due to the axial fixation of the respective holder 13 on the housing 2, the particle filter unit 6 axially fixedly coupled to the respective holder 13 is automatically axially fixed in the housing 2. At the same time, this means that when the clamp connection 11 is loosened, the fixing of the respective holder 13 is canceled, as a result of which the fixing of the position of the particle filter unit 6 is also canceled. As a result, with the housing 2 open, the particulate filter unit 6 can be taken out of the outlet housing part 9.
  • the middle housing part 12 is detachably connected to the inlet housing part 7 via the inlet-side clamp connection 11a and to the outlet housing part 9 via the outlet-side clamp connection 11b. Further, the particulate filter unit 6 also extends within the center housing part 12. As a result, a in Fig. 1 arranged with a curly brace axial portion 14 of the particulate filter unit 6 in the middle housing part 12.
  • the middle housing part 12 is fixedly arranged on the particle filter unit 6 at least in the axial direction 3.
  • the particle filter unit 6 comprises a particle filter tube 15, in which at least one particle filter element 16 is positioned by means of a bearing mat 17.
  • the middle housing part 12 may be firmly connected to this particulate filter tube 15, for example via a solder joint or via a welded connection.
  • the middle housing part 12 is configured tubular and axially fixed to the particle filter tube at an axial end region 18 facing the outlet housing part 9 15, while it is disposed on the inlet housing part 7 facing axial end portion 19 axially displaceable on the particulate filter tube 15.
  • the end region 18, which is fixedly arranged on the particle filter tube 15, is located approximately in the center of the particle filter unit 6, while the displaceable end region 19 is arranged on the end of the particle filter unit 6.
  • the displaceable end portion 19 forms a sliding fit and allows thermally induced relative movements between the center housing part 12 and the particulate filter tube 15.
  • the two brackets 13a, 13b formed directly.
  • the brackets 13a, 13b integrally formed on the middle housing part 12.
  • the inlet side bracket 13 a forms an inlet side flange of the center housing part 12, which is connectable in connection with the inlet side clamp connection 11 a with a corresponding flange of the inlet housing part 7.
  • the outlet-side holder 13b forms an outlet-side flange of the middle housing part 12, which can be connected to a corresponding flange of the outlet housing part 9 via the outlet-side clamp connection 11b.
  • the holder 13 is integrated into the clamp connection 11, such that, due to the axial connection of the two housing parts 7, 9, the holder 13 is fixed axially to the housing 2 or to these two housing parts 7, 9.
  • the holder 13 is attached in this embodiment, the particulate filter tube 15, for example.
  • the holder 13 is arranged in an end region of the particle filter unit 6 facing the inlet housing part 7.
  • the particle filter unit 6 or its particle filter tube 15 is supported radially via a wire mesh ring 20.
  • the wire knit ring 20 allows an axial displaceability between the outlet housing part 9 and the particle filter tube 15.
  • the wire knit ring 20 is removed comparatively far from the holder 13.
  • the wire knit ring 20 is measured in the axial direction 3 Distance between the single holder 13 and the Drahtgestrickring 20 at least 50% of a measured also in the axial direction 3 length of the particulate filter unit 6. This results in a stable support and positional fixation for the particulate filter unit 6 in the housing. 2
  • the respective holder 13 has a V-profile 21 in axial section.
  • This V-profile 21 has an inlet-side flank 22 and an outlet-side flank 23.
  • the inlet housing part 7 has an annular collar 24 which fits to the inlet-side flank 22 and the forms a connection flange of the inlet housing part 7.
  • the outlet housing part 9 has an annular collar 25 which fits the outlet-side flange 23 and which forms a connection flange of the outlet housing part 9.
  • the respective clamp connection 11 has a clamp 26 which biases the respective annular collar 24 and 25 axially against the respective flank 22 and 23, respectively.
  • an inlet-side sealing element 27 can be arranged between the annular collar 24 of the inlet housing part 7 and the inlet-side flank 22.
  • an outlet-side sealing element 28 can be arranged between the annular collar 25 of the outlet housing part 9 and the outlet-side flank 23.
  • the clamp 26 is here equipped with a V-profile 29, whose unspecified flanks engage over the respective annular collar 24, 25 and the respective holder 13 and axially bias against each other.
  • the clamp 26 may also be referred to as a V-clamp.
  • the clamp 26 also has a circumferentially rotating clamping band 30 which cooperates with a clamping device, not shown here, to initiate a oriented in the circumferential direction tensile stress in the clamp 26 can.
  • the clamp 26 may also be referred to as a band clamp and in particular as a V band clamp.
  • the clamp 26 biases the inlet-side annular collar 24 axially against the inlet-side flank 22 of the holder 13 and, on the other hand, the outlet-side annular collar 25 axially against the outlet-side flank 23 of the holder 13.
  • the holder 13 forms an inner support for the two annular collars 24, 25.
  • the clamp 26 of the inlet-side clamped joint 23a biases on the one hand the inlet-side annular collar 24 axially against the inlet-side flank 22 of the inlet-side bracket 13a and on the other hand is supported on the outlet-side flank 23 of the inlet-side bracket 13a.
  • the clamp 26 of the exhaust-side clamped joint 11b biases the exhaust-side annular collar 25 axially against the exhaust-side flank 23 of the exhaust-side bracket 13b, while being supported on the inlet-side flank 22 of the exhaust-side bracket 13b.
  • the inlet-side annular collar 24 is supported via the inlet-side sealing element 27 on the inlet-side flank 22, while the outlet-side annular collar 25 is supported on the outlet-side flank 23 by the outlet-side sealing element 28 on the same bracket 13.
  • the inlet-side annular collar 24 is supported via the inlet-side sealing element 27 on the inlet-side flank 22 of the inlet-side holder 13a, while the inlet-side clip 26 rests directly on the outlet-side flank 23 of the inlet-side holder 13a without additional sealing element.
  • another sealing element may be provided here as well, which is arranged between the clamp 26 and the holder 13.
  • the outlet side clamp connection 11b There, the outlet-side annular collar 25 is brought to rest on the outlet-side flank 23 of the outlet-side holder 13b via the outlet-side sealing element, while the respective flank of the outlet-side clip 26 comes to rest directly on the inlet-side flank 22 of the outlet-side holder 13b.
  • an additional sealing element may be provided.
  • the inlet housing part 7 can be assembled from an upper shell 31, a lower shell 32 and a tubular body 33.
  • An inner bottom 34 inserted into the upper shell 31 leads to a double-walled construction at the inlet-side, axial end region of the housing 2.
  • This double-wall construction provides a cavity which allows air gap insulation or as here can be filled with a thermally insulating insulating material 35.
  • the oxidation catalyst unit 5 comprises a catalyst tube 36, in which at least one catalyst element 37 is positioned by means of a bearing mat 38.
  • the catalyst tube 36 may be supported axially forward and axially at the rear of the tubular body 33 of the inlet housing part 7 and define an annular space 39 with the tubular body 33 between its axial ends.
  • This annular space 29 can also form an air gap insulation. Furthermore, it can also be filled with an insulating material.
  • connection points 40 for probes can be provided in the region of the inlet housing part 7, connection points 40 for probes can be provided.
  • the outlet housing part 9 can have an inner shell 41 and an outer shell 42, between which a distance is maintained which allows air gap insulation and which can be filled with an insulating material 43. Furthermore, connections 44 for probes and the like can also be provided on the outlet housing part 9.
  • the particle filter unit 6 is also provided with an axial cushion 45 and with a wire knit ring 46 in order to axially support the particle filter element 16 on the particle filter tube 15 on the outflow side.
  • the outlet housing part 9 also has a tubular body 48, which is connected to the inner shell 41 and / or outer shell 42 and which has the outlet-side annular collar 25 of the outlet housing part 9.
  • Fig. 1 is in the inlet housing part 7, according to the preferred embodiment shown here, a Einströmtrichter 49 arranged, namely upstream of the oxidation catalyst unit 5.
  • the inflow funnel 49 is designed so that it widens in the flow direction. According to the FIGS. 5 to 12
  • This inlet funnel 49 can be designed differently. In all embodiments, it has an outflow side 50 whose cross-section substantially corresponds to the inlet cross-section of the oxidation catalyst unit 5. In contrast, an inlet side 51 at the respective inlet funnel 49 can be designed differently.
  • the inlet side 51 is formed by a single inlet opening 52.
  • the inlet side 51 comprises a central inlet opening 53 opposite the outlet side 50 and a perforation 54 which is formed on the shell body of the inflow funnel 49.
  • a perforation 54 which is formed on the shell body of the inflow funnel 49.
  • the FIGS. 7 and 8 can also be dispensed with the central inlet opening 53, so that the inlet side 51 is formed in these embodiments only by the perforation 54.
  • FIG. 12 shows an embodiment in which a central inlet port 53 is again combined with a perforation 54 to form the inlet side 51.
  • the perforation 54 here has a significantly smaller hole width than, for example, in the embodiments of FIGS. 6 to 8 , About the hole width of the perforation 54 whose flow resistance can be determined. What influences the homogenizing effect of the inflow funnel 49.
  • An inlet opening 53 may be provided. Additionally or alternatively, a perforation 54 may be provided, which in the embodiments of the FIGS. 10 and 11 may be present at a disc-shaped portion of the inflow funnel 49 or according to the in Fig. 12 shown embodiment can be formed again on the jacket-shaped portion.
  • the inflow funnel 49 is frusto-conical overall or at least has a frusto-conical portion.
  • the inflow funnel 49 formed by a segment of a spherical shell.
  • the inflow funnel 49 allows homogenization of the flow of the oxidation catalyst unit 5, even with an exhaust gas inlet 8 oriented transversely to the axial direction 3, in the case of extremely compact installation conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
EP10163293.3A 2009-06-10 2010-05-19 Abgasreinigungseinrichtung Active EP2261475B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009024534A DE102009024534A1 (de) 2009-06-10 2009-06-10 Abgasreinigungseinrichtung

Publications (2)

Publication Number Publication Date
EP2261475A1 EP2261475A1 (de) 2010-12-15
EP2261475B1 true EP2261475B1 (de) 2015-10-21

Family

ID=42797260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10163293.3A Active EP2261475B1 (de) 2009-06-10 2010-05-19 Abgasreinigungseinrichtung

Country Status (4)

Country Link
US (1) US8568661B2 (zh)
EP (1) EP2261475B1 (zh)
CN (1) CN101922331B (zh)
DE (1) DE102009024534A1 (zh)

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Also Published As

Publication number Publication date
DE102009024534A1 (de) 2010-12-16
EP2261475A1 (de) 2010-12-15
US20110023471A1 (en) 2011-02-03
CN101922331B (zh) 2013-10-16
CN101922331A (zh) 2010-12-22
US8568661B2 (en) 2013-10-29

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