EP1467070B1 - Combinaison d'un traitement des gaz d'échappement et d'un silencieux implanté dans la ligne d'échappement d'un moteur à combustion interne - Google Patents

Combinaison d'un traitement des gaz d'échappement et d'un silencieux implanté dans la ligne d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP1467070B1
EP1467070B1 EP04007937A EP04007937A EP1467070B1 EP 1467070 B1 EP1467070 B1 EP 1467070B1 EP 04007937 A EP04007937 A EP 04007937A EP 04007937 A EP04007937 A EP 04007937A EP 1467070 B1 EP1467070 B1 EP 1467070B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
section
housing
module
gas
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.)
Expired - Lifetime
Application number
EP04007937A
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German (de)
English (en)
Other versions
EP1467070A1 (fr
Inventor
Jacob Dr.Dipl.-Chemiker Eberhard
Hans-Peter Mai
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.)
Roth Technik Austria GmbH
MAN Truck and Bus SE
Original Assignee
Roth Technik Austria GmbH
MAN Nutzfahrzeuge AG
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Filing date
Publication date
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Publication of EP1467070A1 publication Critical patent/EP1467070A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0231—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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
    • F01N3/24—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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers
    • 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
    • F01N2470/22—Inlet and outlet tubes being positioned on the same side of the apparatus
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes
    • F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/08—Surface coverings for corrosion prevention
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/02—Corrosion resistive metals
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/02—Corrosion resistive metals
    • F01N2530/04—Steel alloys, e.g. stainless steel

Definitions

  • the invention relates to a combined exhaust aftertreatment / Schalldämpfungsvoriques in the exhaust line of an internal combustion engine, in particular diesel engine of a commercial vehicle such as trucks or buses with features according to the preamble of claim 1.
  • WO-A-03018971 discloses an exhaust aftertreatment device for the exhaust gases of a diesel engine, in whose exhaust line a catalyst housing is arranged. In this are at the beginning of two adjacent parallel flowed oxidation catalysts and spaced apart in terms of flow next to each other at least three, also flowed through parallel particle filter. In this case, their installation is such that the housing of each particulate filter outside either unpurified or purified exhaust gas for keeping warm the particulate filter are flowed around.
  • WO-A-0211862 discloses a silencer with built-in particulate filter cartridges with internal NO x reductants.
  • the particulate filter cartridges are not installed in housings so that the exhaust gas can flow freely through the particulate filters from radially outside to inside.
  • the object of the invention is derived, namely, to create opportunities for exhaust aftertreatment / Schalldämpfungsvoriquesen of the generic type with constructive measures with which the problem of sulfuric acid corrosion can be remedied cost-reducing.
  • An essential principle of the invention is that the sulfuric acid-forming exhaust aftertreatment takes place within the muffler in at least one exhaust aftertreatment / Schalldämpfungsmodul and only made of it to be purified exhaust gas housing made of ferritic or austenitic stainless steel and it is thereby possible, the outer walls of the muffler and each internal organ in this, such as the transverse wall, which is outside the exhaust aftertreatment / noise attenuation module, made of unalloyed, aluminized or otherwise coated steel sheet.
  • the latter requires lower material costs and lower tooling costs for the silencer and, seen as a whole, also lower production costs for the overall exhaust aftertreatment / noise damping system.
  • the combined exhaust aftertreatment / Schalldämpfungsvortechnische invention is arranged in the exhaust system of an internal combustion engine, in which it is z. B. may be a diesel engine of a commercial vehicle such as trucks or buses.
  • This exhaust aftertreatment / Schalldämpfungsvortechnisch is modular.
  • the first module is in all embodiments of the invention basically the muffler 1. This is generally limited by a front end wall 2, a rear end wall 3 and a peripheral outer wall 4. This may be cylindrical and have a circular, oval, rectangular or square cross-section or be bulged barrel-shaped.
  • the third housing section 10, 10 ', 10 "adjoining the second section 9, 9', 9" receives at least one exhaust aftertreatment device 6.
  • the housing end section 11 which, after flowing through the V-cat 5 and the exhaust gas aftertreatment device (s), collects 6 purified exhaust gas which is exhausted and attenuates from the muffler 1 , 11 ', 11 ".
  • a steel with the standard designation ST 12-03. The connection between the end walls 2, 3 and the peripheral wall 4 of the muffler 1 by known methods such as folding.
  • AN / SD module 7 consists in the first construction principle of a composite of two parts housing.
  • the division of the housing is useful in two places, the interface may be either between the second housing portion 8 and third housing portion 9 or between the third housing portion 10 and the fourth, ie the housing end portion 11.
  • the two first housing sections 8 and 9 and the two remaining housing sections 10 and 11 each form a housing part to be prefabricated.
  • the first three housing sections 8, 9, 10 and the housing end section 11 each form a housing to be prefabricated, the latter being the more preferred version.
  • the first housing section 8 is formed here circular cylindrical and hugs the outside of the built-in it V-Kat 5 at.
  • the second, the overflow chamber 12 limiting housing portion 9 connects coaxially to the first housing portion 8 at.
  • the third housing section 10 which has a circular-cylindrical shape and has a substantially larger diameter than the first housing section 8, adjoins the outside of the exhaust-gas aftertreatment device 6 built into it.
  • the fourth, so the end portion 11 of the housing closes with its funnel-shaped tapered beginning portion 11/1 coaxial with the same diameter, starting from the diameter of the third housing portion 10 latter and merges into a circular cylindrical tailpipe 11/2, with which he gas-tight out of the muffler 1 is led to the outside.
  • the two housing parts form together with the built-V-Kat 5 and exhaust aftertreatment device 6 each independent of the other to be produced sub-module within the AN / SD module 7.
  • the two sub-modules are combined in the final assembly at the intended interface, the connection to the abutting housing sections either gas tight tight, z. B. by welding, or via a gas-tight connection mechanism releasably connected to each other.
  • the detachable connection is more expensive, but allows in the case of a defect, a quick replacement of the exhaust aftertreatment device. 6
  • the housing end portion 11 may be wholly or partially perforated for the purpose of soundproofing or equipped with individual holes 14 - see Fig. 8, 9, 10, 11, 14, 15 and / or outside either along its entire length or only a partial length Schalldämpfungs- or absorption material 15 to be coated - see Fig. 7, 8, 9, 10, 11, 12, 14, 15.
  • the two sub-modules form a prefabricated AN / SD module 7, which is then installed as a system core in the muffler 1.
  • installation position of the AN / SD module 7 can be attenuated with this due to its design according to the invention in the region of its housing end portion 11 with the enormously large free cross-section of the funnel absorption path of the muzzle sound especially in the high and medium frequency range without noticeable pressure loss. This is not done as usual by reflection of the sound waves, but by converting the sound energy into heat.
  • Fig. 1 shows the inlet pipe 13 centrally disposed in the front end wall 2 of the muffler 1 and coaxially aligned to the AN / SD module 7 installed in the muffler 1 and with centrally through the rear end wall 3 of the muffler 1 gas-tight led out end pipe 11 / second
  • the AN / SD module 7 is held approximately in the middle of its length by a non-gas-tight transverse wall 16 in the installed position, which is perforated or has breakthroughs, so that the AN / SD module 7 on the entire installation length in the muffler 1 outside of exhaust gas for its preheating is um Jardinbar.
  • the transverse wall 16 also forms a muffler in the muffler 1. After installation of the AN / SD module 7 in the muffler interior, the rear end wall 3 of the muffler 1 with its peripheral outer wall 4 z. B. connected by crimping the edge.
  • transverse walls 17, 18 Internally of the muffler 1 of the AN / SD module 7 is held by two axially spaced apart transverse walls 17, 18 in the installed position, these two transverse walls 17, 18 divide the muffler interior into three chambers, namely a front Abgaseinströmhunt 19, a middle Heat chamber 20 and a rear transfer chamber 21.
  • a the two transverse walls 17, 18 penetrating pipe 22 passes the fed via the inlet pipe 13 into the exhaust gas inlet 19 exhaust gas from this to the transfer chamber 21 on from where it then flows in the opposite direction the AN / SD module 7 for its purification.
  • the transverse wall 17 is preferably gas-tight, the transverse wall 18, however, is preferably gas-permeable, z. B. perforated or provided with openings.
  • the transverse walls 17, 18 and the tube 22 also form Schalldämpfungsorgane in the muffler. 1
  • Fig. 5 shows the AN / SD module 7 in the same way in the muffler 1 as in the case of Fig. 1, 2 installed.
  • the inlet pipe 13 is relatively far extended centrally into the interior of the muffler 1, where it passes through a transverse wall 16 parallel to the second transverse wall 23 and perforated in the area between this transverse wall 23 and the front end wall 2 of the muffler 1 or holes 24th Mistake.
  • the transverse walls 16, 23 are both gas permeable, z. B. over several openings, and together with the perforated inlet pipe 13 on the one hand silencer elements, on the other hand room divider in the muffler 1, whereby the interior is divided into a front chamber 25, middle chamber 26 and rear chamber 27.
  • the exhaust gas is introduced with a small proportion of the holes 24 in the front chamber 25, with the largest proportion but in the middle chamber 26 and then flows through there from the AN / SD module. 7
  • Fig. 6 shows the inlet pipe 13 eccentrically and parallel to the longitudinal axis LA of the muffler 1 relatively far into this to about the middle of its longitudinal extent projecting and there by two widely spaced, through perforations or openings gas permeable transverse walls 28, 29 passed.
  • These transverse walls 28, 29 serve as a muffler-internal support on the one hand for the inlet pipe 13, on the other hand, the next, also eccentric and parallel to the longitudinal axis of the muffler 1 in this built-in AN / SD module 7.
  • the two transverse walls 28, 29 divide the muffler interior into a front chamber 30, middle chamber 31 and rear chamber 32.
  • the inlet tube 13 is in the region of the front and middle chambers 30, 31 perforated or provided with holes 33, 34, so that the exhaust gas via the inlet tube 13 substantially in the rear chamber 32 can be fed, but partially also through the holes 33, 34 in the front and middle chambers 30, 31 can occur.
  • the input section 8 of the housing on the inlet side before the installation area of the V-Kat 5 extended forward to the front transverse wall 28 and perforated in this area or provided with holes 35.
  • the exhaust gas fed into the muffler 1 flows from the rear chamber 32 via the middle chamber 31 to the front chamber 30 and from there through an opening 36 in the front transverse wall 28 and from the middle chamber 31 via the holes 35 in the AN / SD module 7 and leaves this cleaned after its flow through its in the rear end wall 3 of the muffler 1 gas-tight led out end pipe 11/2.
  • the transverse walls 28, 29 and the internal part of the inlet pipe 13 also serve for soundproofing.
  • Fig. 7 shows an embodiment of the AN / SD module 7, in which the housing end portion 11 has a U-shaped course with which the purified exhaust via the tailpipe 11/2 on the side of entry again from the muffler 1 ausleitbar is.
  • the inlet pipe 13 eccentrically penetrates the front end wall 3 and projects only slightly into the interior of the muffler 1.
  • the housing sections 8, 9, 10 and 11/1 of the AN / SD module extend 7.
  • a gas-permeable by perforation or openings made transverse wall 37 provided.
  • the first housing portion 8 and in an upper opening the end tube 11/2 of the housing portion 11 is supported.
  • the transverse wall 37 divides the muffler interior into a front chamber 38 and rear chamber 39 and serves together with the relatively long tail pipe 11/2 for soundproofing.
  • Fig. 8 shows the AN / SD module 7 in comparison with the example of FIG. 1 axially closer to the inlet pipe 13 and designed with a longer end pipe 11/2.
  • the housing end portion 11 is provided with a perforation or holes 14 and coated over almost its entire length with an outer layer 15 of Schalldämpfungs- or absorption material.
  • the embodiment according to FIG. 9 differs from that according to FIG. 8 in that only the end tube 11/2 is provided with a perforation or holes 14 and is coated on the outside with a layer 15 of damping or absorption material.
  • FIG. 10 differs from that according to FIG. 8 in that a Venturi nozzle 40, which contributes to a further reduction of the sound level at the outlet, is installed in the end pipe 11/2 of the housing end section 11.
  • the part 11/1 of the housing end section 11 is composed of individually produced double half-shells which after their assembly and insertion of the end pipe 11/2 are combined as a united housing end section 11 are mounted on the housing portion 10, which here projects slightly beyond the transverse wall 16 and the housing end portion 11 receives on its protruding portion.
  • Fig. 13 shows an embodiment similar to that of Fig. 6.
  • the muffler 1 has no circular, but approximately rectangular cross-section.
  • In the lower part of the inlet pipe 13 is guided eccentrically and parallel to the longitudinal axis of the muffler LA in the muffler interior and penetrates there two holding him through perforation or gas-permeable holes made transverse walls 41, 42.
  • This AN / SD module 7 is that of 12, the end tube 11/2 of the housing end portion 11 is not straight, but angled and led out approximately at the level of the inlet tube 13 laterally through the circumferential outer wall 4 of the muffler 1.
  • This AN / SD module 7 is installed in the silencer 1 in such a way that its housing parts 8, 9, 10 with the installed V-type catalytic converter 5 and exhaust aftertreatment device 6 extend in the upper region and parallel to the longitudinal axis LA of the silencer 1.
  • This AN / SD module 7, like the inlet pipe 13, is held by the transverse walls 41, 42, which, like the inlet pipe 13 and the housing end section 11, also serve to dampen noise.
  • the transverse walls 41, 42 divide the muffler interior into a front chamber 43, middle chamber 44 and rear chamber 45.
  • the inlet pipe 13 is perforated in the region of the middle (44) and rear chamber 45 or holes 46, so that Exhaust gas from the inlet pipe 13 can not only enter the rear chamber 45, but to a lesser extent laterally in the middle and rear chambers 44, 45. From there, the exhaust gas passes through the permeable transverse walls 41, 42 back into the front chamber 43, from where it can enter into the AN / SD module 7 for the flow therethrough.
  • FIG. 14 is similar to that of FIG. 8.
  • the main difference is that here the AN / SD module 7 easily replaceable in the muffler. 1 arranged and attached thereto for an end plate 47, which forms the central part of the two-part rear end wall 3 of the muffler 1 here.
  • the outer annular portion 48 of the end wall 3 is joined to the peripheral outer wall 4 by folding and the end plate 47 with the AN / SD module 7 is secured to the annular portion 48 by means of a plurality of clamping or screw 49.
  • this AN / SD module 7 could still be internally supported by the muffler 1 by a transverse wall 16 (as in FIG. 8).
  • FIGS. 15 and 16 has two AN / SD modules 7 of the type also used in FIG. 9. However, these have differently long tailpipes 11/2 at their housing end portions 11, so that they, as shown in Fig. 15, axially offset from each other, but each parallel to the longitudinal axis LA of the muffler 1 and in Axialfugion partially overlapping in the latter can be installed.
  • a non-gas-tight transverse wall 50 holds the two AN / SD modules 7 in the installed position, the other holder point for this is given by the rear end wall 3 of the muffler 1, through which they are led out gas-tight with their tailpipes 11/2.
  • FIGS. 17 to 19 show an embodiment of the invention with an AN / SD module 7 designed according to a second basic principle.
  • This AN / SD module 7 forming the system core in the silencer 1 consists of several - in the case shown four - exhaust aftertreatment modules together, which open into a housing end portion 11 '.
  • all the exhaust aftertreatment modules are preferably of the same design and configured and have in each case a separate housing at the beginning of a V-Kat 5, built-in exhaust aftertreatment device 6 and in between a funnel-shaped extending to the latter overflow chamber 12 'on.
  • the housing of this AN / SD module 7 is accordingly composed of the housings of the exhaust aftertreatment modules and the common housing end section 11 '.
  • the latter surrounds in this type of AN / SD module 7 with its substantially rectangular initial region 11/1 'the third housing sections 10' of the exhaust aftertreatment modules outside peripherally and nestles with its rounded corner areas - as shown in FIG Peripheral sections of the same form fit.
  • this housing end portion 11 frontally gas-tight or attached via a gas-tight, but releasable connection mechanism to the transverse wall 51.
  • This transverse wall 54 separates in the muffler 1 a front Abgaseinströmhunt 55 from a rear chamber 56. Furthermore, this AN / SD module 7 has a plurality of exhaust aftertreatment modules - in the illustrated example two - each of which in a sub-housing 10 "a built-exhaust aftertreatment 6th Each of these exhaust aftertreatment modules communicates with its sub-housing 10 "via a coaxial aperture 57 in the transverse wall 54 with the overflow chamber 12" and is connected with its partial housing 10 "gas-tight on the transverse wall 54.
  • each of these exhaust aftertreatment modules with an outer peripheral portion of its housing 10" form fit to a inner circumferential region of the housing end portion 11 "nestled, the outer circumferential surrounds this sub-housing 10" of the exhaust aftertreatment modules with its cylindrical, oval here in cross-section here, also gas-tight front side gas-tight or via a gas-tight, but releasable connection mechanism on the transverse wall 54th
  • the housing end section 11 "tapers, with its central region 11/2" adjoining the starting region 11/1 "toward an end region 11/3" which in the example shown is formed by a circular-cylindrical end tube with which the Housing end portion 11 "is led out of the muffler 1 gas-tight.
  • the housing sections 8 "and 9" form with the initially installed V-Kat 5 also a prefabricated module, which is then combined with the transverse wall 54.
  • the respective housing end section 11 'or 11 is in the region of its start and middle part 11/1', 11/1" and 11/2 ', 11/2 "preferably realized in a two-ply half-shell construction, ie in each case a prefabricated inner and outer upper half-shell is combined with an inner and outer lower half-shell, in which then double-walled part of the tailpipe 11/3 'and 11/3" is installed gas-tight.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Claims (11)

  1. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique dans la ligne d'échappement d'un moteur à combustion interne, en particulier d'un moteur diesel de véhicule industriel, tel qu'un camion ou un bus, avec un silencieux (1) limité dans l'espace par une paroi d'extrémité avant (2) et arrière (3), et une paroi extérieure périphérique (4), et à l'intérieur duquel est monté au moins un catalyseur à préoxydation (5) augmentant de manière significative la teneur en NO2 dans les gaz d'échappement le traversant et au moins un dispositif de posttraitement des gaz d'échappement, le gaz d'échappement à retraiter pouvant être envoyé dans le silencieux (1) par un conduit d'entrée (13) et pouvant, après son passage dans le catalyseur à préoxydation et le dispositif de posttraitement des gaz d'échappement, ressortir du silencieux, nettoyé et indirectement insonorisé,
    - au moins un module de posttraitement des gaz d'échappement et d'isolation phonique (7) - appelé dans ce qui suit module PG/IP - étant monté dans le silencieux (1) comme noyau du système,
    - le module PG/IP (7) présentant un boîtier de module PG/IP composé de plusieurs pièces,
    - au moins un catalyseur à préoxydation (5) étant monté dans un premier tronçon (8, 8', 8") du boîtier de module PG/IP , caractérisé en ce que
    - un deuxième tronçon (9, 9', 9") étant raccordé au premier tronçon (8, 8', 8") du boîtier du module PG/IP, qui s'élargit en entonnoir et délimite une chambre de décharge (12, 12', 12"),
    - un troisième tronçon (10, 10', 10") étant raccordé au deuxième tronçon (9, 9', 9") du boîtier du module PG/IP, dans lequel est monté au moins un organe de posttraitement des gaz d'échappement (6) - filtre à particules ou séparateur catalytique de particules ou catalyseur -,
    - un quatrième tronçon (11, 11', 11") collectant les gaz d'échappement nettoyés et sortant du silencieux (1) côté insonorisé, étant raccordé au troisième tronçon (10, 10', 10") du boîtier du module PG/IP, et
    - toutes les pièces du boîtier de module PG/IP (7) sont fabriquées en acier spécial ferritique ou austénitique résistant à l'acide sulfurique, mais en ce que toutes les parois extérieures (2, 3, 4), le conduit d'entrée (13) et chaque organe interne du silencieux (1) tel que la paroi transversale ou de soutien située en-dehors du module PG/IP (7) sont fabriqués en tôle d'acier non alliée, aluminiée ou enduite selon un autre procédé à des fins de protection anticorrosion.
  2. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 1, caractérisé en ce que le module PG/IP (7) constituant le noyau du système dans le silencieux (1) présente un boîtier de module PG/IP composé de deux pièces préformées séparément, les deux premiers (8, 9) ou les trois premiers tronçons (8, 9, 10) du boîtier de module PG/IP constituant la première partie et le troisième (10) et quatrième (11) ou seulement le quatrième tronçon (11) du boîtier de module PG/IP constituant la deuxième partie, qui est raccordée à la première partie soit de manière fixe, soit détachable par un système de raccordement.
  3. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 2, caractérisé en ce que le premier tronçon (8) du boîtier de module PG/IP présente une forme cylindrique et son contour extérieur s'adapte au catalyseur à préoxydation (5) intégré, en ce que le deuxième tronçon du boîtier de module PG/IP, adjacent à la chambre de décharge (12), est raccordé de manière coaxiale au premier tronçon (8) du boîtier de module PG/IP et s'élargit en forme d'entonnoir et que le troisième tronçon (10) cylindrique du boîtier de module PG/IP, dont le contour s'adapte à l'organe de posttraitement des gaz d'échappement (6) intégré, s'y raccorde de manière coaxiale, et en ce que le quatrième tronçon (11) du boîtier de module PG/IP, qui forme une sortie d'échappement et un silencieux de sortie, s'amincit en forme d'entonnoir de manière coaxiale dans sa première partie (11/1) à partir du diamètre du troisième tronçon (10) du boîtier de module PG/IP et se termine en une partie finale (11/2) cylindrique, avec laquelle il ressort du silencieux (1) de manière étanche aux gaz.
  4. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 1, caractérisé en ce que le module PG/IP (7) constituant le noyau du système dans le silencieux (1) se compose de plusieurs modules de posttraitement des gaz d'échappement qui débouchent dans un quatrième tronçon commun (11') du boîtier de module PG/IP.
  5. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 4, caractérisé en ce que les modules de posttraitement des gaz d'échappement de ce module PG/IP (7) sont tous formés et constitués de la même façon et présentent dans un boîtier de module PG/IP chacun un catalyseur à préoxydation (5) côté entrée et un organe de posttraitement des gaz d'échappement (6) côté sortie, et entre les deux une chambre de décharge (12') s'élargissant en entonnoir vers le côté sortie.
  6. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon l'une des revendications 4 et 5, caractérisé en ce que les boîtiers des modules de posttraitement des gaz d'échappement de ce module PG/IP (7) sont disposés parallèlement les uns par rapport aux autres et par rapport à l'axe longitudinal (AL) du silencieux (1) à l'intérieur de celui-ci et des ouvertures pénètrent dans une paroi transversale (51) étanche aux gaz à l'extérieur, la paroi transversale (51) séparant une chambre d'admission des gaz d'échappement (52) d'une autre chambre (53) dans le silencieux (1), et en ce que chacun de ces modules de posttraitement des gaz d'échappement communique côté entrée avec la chambre d'admission des gaz d'échappement (52) et débouche côté sortie dans le quatrième tronçon (11') du boîtier de module PG/IP.
  7. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon l'une des revendications 4 à 6, caractérisé en ce que le boîtier de ce module PG/IP (7) se compose des boîtiers des modules de posttraitement des gaz d'échappement et du quatrième tronçon (11') du boîtier de module PG/IP, le premier tronçon du boîtier de module PG/IP étant ici constitué par les premiers tronçons (8') du boîtier des modules de posttraitement des gaz d'échappement, le deuxième tronçon du boîtier de module PG/IP étant en outre constitué des tronçons du boîtier (9') des modules de posttraitement des gaz d'échappement s'élargissant en entonnoir et le troisième tronçon du boîtier de module PG/IP étant constitué des troisièmes tronçons (10') des modules de posttraitement des gaz d'échappement, chaque premier tronçon de boîtier (8') étant par ailleurs de forme cylindrique et s'adaptant par ses contours extérieurs au catalyseur à préoxydation (5) qui y est intégré, le deuxième tronçon de boîtier (9') s'élargissant en entonnoir et délimitant une chambre de décharge (12'), étant raccordé de manière coaxiale à chaque premier tronçon de boîtier (8'), et le troisième tronçon de boîtier (10') cylindrique étant raccordé de manière coaxiale au deuxième tronçon et s'adaptant par ses contours extérieurs à l'organe de posttraitement des gaz d'échappement (6) intégré.
  8. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 7, caractérisé en ce que le quatrième tronçon (11') du boîtier de module PG/IP épouse avec sa première partie (11/1') les contours extérieurs des troisièmes tronçons (10') des modules de posttraitement des gaz d'échappement et s'adapte par crabotage aux tronçons périphériques de ceux-ci, est en outre fixé de manière permanente et étanche aux gaz ou à l'aide d'un mécanisme de raccordement étanche aux gaz, mais amovible à la paroi transversale (51) côté avant, s'amincit en forme d'entonnoir dans sa partie centrale (11/2') derrière les plans de sortie des modules de posttraitement des gaz d'échappement et se termine en une partie finale (11/3'), qui est de préférence constituée d'un conduit final cylindrique, avec lequel le quatrième tronçon (11') du boîtier de module PGIIP ressort du silencieux (1) de manière étanche aux gaz.
  9. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon la revendication 1, caractérisé en ce que le module PG/IP (7) constituant le noyau du système dans le silencieux (1) présente un boîtier de module PG/IP composé de plusieurs boîtiers partiels préformés séparément (8", 9", 10", 11"), en ce qu'un catalyseur à préoxydation (5) est monté dans le premier tronçon (8"), de préférence cylindrique, du boîtier du module PG/IP, en ce qu'un deuxième tronçon (9") du boîtier de module PG/IP, s'élargissant en entonnoir et délimitant une chambre de décharge (12") est raccordé de manière coaxiale à ce premier tronçon (8") du boîtier de module PG/IP, est raccordé à son extrémité de manière étanche aux gaz à une paroi transversale (54) séparant dans le silencieux (1) une chambre d'admission des gaz d'échappement (55) d'une autre chambre (56), en ce que ce module PG/IP (7) présente en outre plusieurs modules de posttraitement des gaz d'échappement, chacun contenant dans un boîtier partiel (10") un organe de posttraitement des gaz d'échappement (6), en ce que chacun de ces modules de posttraitement des gaz d'échappement communique par son boîtier partiel (10") avec la chambre de décharge (12") par l'intermédiaire d'une ouverture (57) réalisée dans la paroi transversale (54), est en outre raccordé côté avant, de manière étanche aux gaz, à la paroi transversale (54) et s'adapte par crabotage avec un contour extérieur au contour intérieur du quatrième tronçon (11") du boîtier de module PG/IP, et en ce que ce quatrième tronçon (11") du boîtier de module PG/IP entoure avec sa première partie (11/1") les boîtiers partiels (10") des modules de posttraitement des gaz d'échappement, est en outre fixé de manière permanente et étanche aux gaz ou à l'aide d'un mécanisme de raccordement étanche aux gaz, mais amovible à la paroi transversale (54) côté avant, s'amincit dans sa partie centrale (11/2") derrière les plans de sortie des modules de posttraitement des gaz d'échappement et se termine en une partie finale (11/3"), qui est, de préférence, constituée d'un conduit final cylindrique par lequel le quatrième tronçon (11") du boîtier de module PGIIP ressort du silencieux (1) de manière étanche aux gaz.
  10. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon l'une des revendications précédentes, caractérisé en ce que le quatrième tronçon (11, 11', 11") du boîtier de module PG/IP est partiellement ou entièrement perforé ou doté de trous individuels à des fins d'isolation phonique et/ou est enduit à l'extérieur sur toute sa longueur ou seulement sur une partie de sa longueur d'un matériau d'isolation phonique.
  11. Dispositif combiné de posttraitement des gaz d'échappement et d'isolation phonique selon l'une des revendications 2 et 3, caractérisé en ce que le module PG/IP (7) est fixé à l'intérieur du silencieux par au moins une paroi transversale ou support étanche aux gaz ou perméable aux gaz d'échappement.
EP04007937A 2003-04-11 2004-04-01 Combinaison d'un traitement des gaz d'échappement et d'un silencieux implanté dans la ligne d'échappement d'un moteur à combustion interne Expired - Lifetime EP1467070B1 (fr)

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DE10316799A DE10316799A1 (de) 2003-04-11 2003-04-11 Kombinierte Abgasnachbehandlungs-/Schalldämpfungsvorrichtung im Abgasstrang einer Brennkraftmaschine
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US20040202591A1 (en) 2004-10-14
EP1467070A1 (fr) 2004-10-13
DE10316799A1 (de) 2004-10-28
US7273592B2 (en) 2007-09-25
DE502004000334D1 (de) 2006-05-04

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