EP0386013B1 - Agencement catalyseur avec corps de guidage de l'ecoulement - Google Patents

Agencement catalyseur avec corps de guidage de l'ecoulement Download PDF

Info

Publication number
EP0386013B1
EP0386013B1 EP88907684A EP88907684A EP0386013B1 EP 0386013 B1 EP0386013 B1 EP 0386013B1 EP 88907684 A EP88907684 A EP 88907684A EP 88907684 A EP88907684 A EP 88907684A EP 0386013 B1 EP0386013 B1 EP 0386013B1
Authority
EP
European Patent Office
Prior art keywords
flow guiding
guiding body
flow
channels
cross
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
EP88907684A
Other languages
German (de)
English (en)
Other versions
EP0386013A1 (fr
Inventor
Wolfgang Maus
Helmut Swars
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP0386013A1 publication Critical patent/EP0386013A1/fr
Application granted granted Critical
Publication of EP0386013B1 publication Critical patent/EP0386013B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01N3/08—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
    • F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
    • 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
    • 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
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2814—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates all sheets, plates or foils being corrugated
    • 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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F01N2330/04—Methods of manufacturing
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
    • F01N2330/324—Corrugations of rectangular form
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/36—Honeycomb supports characterised by their structural details with flow channels formed by 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24149—Honeycomb-like

Definitions

  • the present invention relates to a flow guide body in a catalytic converter arrangement, in particular for internal combustion engines, according to the preamble of claim 1 and a method for its production.
  • a flow guide in a catalyst arrangement is known for example from DE-A-34 30 399 or DE-A-34 30 400.
  • Most conventional catalyst arrangements contain a honeycomb-like catalyst body with a multiplicity of parallel channels, which can either consist of a ceramic base material or of structured metal sheets. Since the usual exhaust pipes have a much smaller cross-section than a catalytic converter body, a conically widening diffuser section is usually arranged in front of each catalytic converter body and, accordingly, a confusing section behind the catalytic converter body as a transition to the normal exhaust pipe.
  • a known problem with catalyst arrangements now consists in that the flow of the catalyst body is not uniform over its entire cross-sectional area, so that flow guide bodies, for example, are used for uniform utilization.
  • Two-stage catalyst bodies are also known from DE-A-30 12 182 in order to achieve conditions optimally adapted to the respective combustion exhaust gases.
  • DE-OS-23 13 040 a catalyst body is known, which is made slightly conical for manufacturing reasons by being pressed into a slightly conical housing.
  • the object of the present invention is therefore to create a flow guide body in a catalytic converter arrangement which brings about an optimal flow against the catalytic converter body.
  • the utilization of the volume required for the diffuser and the confuser is to be improved or this volume is to be reduced.
  • a better light-off behavior of the catalytic converter should also be achieved during a cold start.
  • Flow guide bodies according to the invention can be used both in the diffuser and in the confuser.
  • the open cross-sectional area of the flow guide body must increase in the diffuser, and it must decrease in the confuser, so that such a flow guide body only has to be arranged upside down.
  • basically only the Flow guide in the diffuser is considered, although all information, unless expressly stated otherwise, also applies to the reverse arrangement in the confuser.
  • a flow guide body which consists of a plurality of at least partially conically widening channels, can direct the flow much more uniformly onto the entire front side of a catalyst body than known arrangements can.
  • the pressure loss caused by the flow guide remains relatively small, in some cases even under the pressure loss that a diffuser without a flow guide would cause.
  • Flow guide bodies according to the invention are therefore honeycomb bodies, the individual channels of which, however, do not run parallel but at angles to one another and which overall have a cross section which increases in the flow direction.
  • the shape of such honeycomb bodies must of course be adapted to the shape of the cross-sectional area of the catalyst body, so that, in addition to truncated cone shapes, flattened shapes are also possible.
  • a difficulty of the present invention lies first of all in the fact that the manufacturing techniques customary for catalyst bodies are not readily applicable to conical honeycomb bodies. Neither can conical bodies with conically widening channels be made from the usual nozzles with ceramic mass, nor can they be wound spirally out of sheet metal strips without problems. When manufacturing from metal sheets, as they are preferably used for catalyst bodies, new forms and manufacturing methods must therefore be found. The problem is that there is no straight line for the spiral winding of conical bodies, for example from alternating layers of smooth and corrugated sheets Sheet metal strips are required, but sheet metal strips with a radius of curvature that decreases from layer to layer. The production of such metal strips is possible in principle, but not necessarily advantageous in terms of production technology.
  • the flow guide body only has to have a much smaller number of channels than the catalyst body itself, so that even relatively complicated manufacturing processes are still possible because of the small number of channels. Even the prefabrication of individual duct modules and their later assembly are a possible way of producing the desired flow guide bodies.
  • each channel has an effective opening angle, which results from its cross-sectional area at the entrance and its cross-sectional area at the exit, unless a channel at the entrance is divided into a plurality of channels at the exit, which also occurs in the present exemplary embodiments. Therefore, when the following describes an opening angle of a channel, it means the solid angle that this channel delimits. The measure of this solid angle is the area that is cut out from this solid angle from the unit sphere around the apex as the center.
  • the individual channels can in any case have such small opening angles that the flow no longer detaches from the walls.
  • the flow separates from the wall at an opening angle of approximately ⁇ / 17 and becomes turbulent.
  • Usual diffusers in catalytic converter arrangements have typical opening angles of 2 ⁇ / 3, so that the flow always separates there, which leads to an uneven distribution of the flow without a flow guide.
  • the separation angle must be determined empirically, but a flow guide body according to the invention can always be produced from so many channels that the critical angle at which the flow separates from the walls is undershot.
  • the subdivision of the diffuser into individual channels therefore reduces the flow resistance in the diffuser despite the installation of partition walls and results in a very uniform distribution on the end face of the catalyst body. If desired, even an uneven distribution of the flow that may still be present can be counteracted by different opening angles of the inner and outer channels of the flow guide body, or any desired uneven distribution over the end face of the catalyst body can be achieved in a targeted manner.
  • the open cross-sectional areas of the individual channels of the flow guide body on the upstream side for example, approximately the same size as the open cross-sectional areas of the channels of the catalyst body.
  • the open cross-sectional areas can even be chosen to be considerably larger there.
  • the flow guide body and the catalyst body are to be separated by an intermediate space which swirls the exhaust gas between the flow guide body and catalyst body allows. This increases the turbulence when entering the catalyst body and thus the effectiveness of the catalyst.
  • the opening angle of the individual channels should be smaller than the angle at which the flow separates from the walls. This measure optimizes the pressure losses caused by the flow guide body.
  • the opening angles of the individual channels of the flow guide body can also be chosen such that turbulence is present, for example at the end of the channels, as a result of which better mixing of the exhaust gas is achieved.
  • This configuration has advantages in particular if, as mentioned below, the flow guide body is also coated with catalytically active material.
  • a very decisive advantage of the invention results in the configurations according to claims 10 and 11.
  • the total catalytically active surface available with unchanged volume is considerably increased.
  • the volume required for the diffuser and possibly also the confuser can thus also be used for the attachment of catalytically active surfaces.
  • the flow control function of the flow guide body is not impaired by this. Rather, the flow guide bodies also become catalyst bodies in addition to the actual catalyst body, which results in additional advantages.
  • the flow guide body can also be coated with a different catalytically active material than the actual catalyst body, for example with a material which in particular improves the cold start properties.
  • a different catalytically active material than the actual catalyst body, for example with a material which in particular improves the cold start properties.
  • this version does not apply in the same way for a catalytic coating of a flow guide body in the confuser, although a catalytically active coating also makes better use of the available volume there.
  • claim 12 describes a particularly preferred method for producing a flow guide body according to the invention, as will be explained in more detail with reference to the drawing.
  • FIG. 1 shows a catalyst arrangement with an inlet tube 1, an outlet tube 2, a customary honeycomb-shaped catalyst body 3, a flow guide body 4 in the diffuser and a flow guide body 5 in the confuser. Mixing gaps 6, 7 are provided between the flow guide bodies 4, 5 and the catalyst body 3.
  • FIG. 2 shows a catalyst arrangement consisting of an inlet tube 21, an outlet tube 22, a catalyst body 23 and a flow guide body 24 in the diffuser, which is separated from the catalyst body 23 by a mixing column 26.
  • This figure indicates the structure of the catalyst body from parallel channels and the structure of the flow guide body from widening in the direction of flow Channels with a room opening angle ⁇ . Basically, it is favorable if the flow guide body begins exactly at the end of the inlet pipe 21, but it may be necessary for manufacturing or fluidic reasons that the end face of the flow guide body is only slightly inside the diffuser.
  • the schematic cross sections through catalyst arrangements shown apply equally to cylindrical or conical arrangements as well as to flattened forms.
  • FIGS. 3, 4 and 5 serve to illustrate how a flow guide body according to the invention can be produced from sheet metal, as is usually also used for metallic catalyst carrier bodies.
  • An alternative is first illustrated in FIGS. 3, 4 and 5.
  • the basic problem is that the overall conical flow guide body should not be created by compressing one end face, because then the ratio of open cross-sectional areas to cross-sectional areas closed by material would be very unfavorable on this end face, which considerably increases the pressure loss.
  • a corrugated sheet 31 is suitable for this purpose, which has slits 34 extending from its outflow side 33 along all or part of the troughs and / or peaks.
  • Such a corrugated sheet 31 is first produced with as steep as possible flanks and a large amplitude. Then the slots 34 are made. Now the corrugated sheet metal on its upstream side 32 can be pulled apart, as a result of which the edge steepness and the amplitude are reduced. The slotted sheet 34 is also pulled apart from the outflow side 33, possibly further than on the inflow side 32. The slots 34 expand without the flanks or the amplitude changing, however. Wraps such a corrugated sheet 31 together with a smooth sheet 35, which, however, does not have to be straight but increasingly curved, spirally on, possibly with increasing spreading of the slots 34, then a desired flow guide body with channels 36 is formed, which have an increasing cross-section in the flow direction . FIGS. 4 and 5 indicate the resulting cross-sectional shape on the inflow side 32 and on the outflow side 33, respectively. For the sake of simplicity, only one straightened position of a corrugated sheet 31 with two smooth sheets 35 was shown.
  • the flow guide body essentially consists of a corrugated plate 71 with a large amplitude and a corrugated plate 72 with the same wavelength and a smaller amplitude. These sheets are wound spirally, but a narrow, smooth intermediate layer 73 is also wrapped on the outflow side, as a result of which the two corrugations cannot interlock there, resulting in an end face that grows much more quickly than on the inflow side.
  • the smooth intermediate layer is not a straight sheet metal strip, but must have an increasing curvature, however, in the case of a narrow sheet metal strip, this can generally be achieved by plastic deformation.
  • the resulting flow guide body shows on its front side a typical constellation of corrugated sheets lying one inside the other, as shown in FIG. 6 and on the outflow side in the inner region a constellation as in FIG. 7 and in the outer region a constellation as shown in FIG.
  • FIGS. 9 and 10 show schematically how flow guide bodies according to the invention can be constructed from individually prefabricated frustoconical channel modules 91 or from rectangular channel modules 101. Other channel cross sections are of course possible, but in addition the individual components can also comprise entire rows of channels, not individual ones.
  • FIG. 11 shows a further possibility of arranging a flow guide body according to the invention from nested, concentrically arranged truncated cone surfaces 111 with increasing opening angle. Such surfaces can be kept at the desired distances, for example by webs, corrugated intermediate layers or the like.
  • the exemplary embodiments mentioned here show only a few of many possibilities for the production of flow guide bodies according to the invention, wherein, of course, considerable variants in the sheet metal structures are possible in accordance with other known catalyst arrangements. In general, it will be advantageous to solder the sheets to one another, but other joining techniques such as gluing, welding and sintering can also be used.
  • the flow guide body according to the invention can also have a jacket tube, as is usually the case with a catalyst body, which then forms the confusor when the catalyst system is assembled or is inserted into one.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Gas Burners (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

Un agencement catalyseur, notamment pour moteurs à combustion interne, comprend un diffuseur qui s'élargit dans le sens de l'écoulement, en amont d'un corps catalyseur (23) en nid d'abeille, un convergeur (25) qui se rétrécit dans le sens de l'écoulement en aval du corps catalyseur (23) et au moins un corps de guidage de l'écoulement installé dans le diffuseur et/ou dans le convergeur. Afin d'assurer un afflux uniforme de la face frontale du corps catalyseur (23) sans étrangler trop fortement le courant de gaz d'échappement, on installe au moins dans le diffuseur un corps de guidage de l'écoulement (24) formé d'une pluralité de canaux adjacents et/ou concentriques qui présentent au moins en partie une section transversale croissante dans le sens de l'écoulement. Les canaux individuels présentent de préférence un angle d'ouverture alpha qui empêche un décollage de courant des parois des canaux individuels. Le corps de guidage de l'écoulement peut en outre être enduit d'une couche d'un matériau catalyseur actif, ce qui permet d'utiliser le volume du diffuseur, éventuellement du convergeur lui aussi, pour agencer des surfaces actives de catalyse, et d'améliorer entre autres, outre l'afflux du corps catalyseur principal (23), les propriétés de démarrage à froid de l'agencement catalyseur.

Claims (12)

1. Corps de guidage pour l'écoulement dans un dispositif à catalyseur, notamment pour des moteurs à combustion interne, comprenant un tronçon divergent s'élargissant dans le sens de l'écoulement en amont d'un corps de catalyseur (3 ; 23) de type à nid d'abeille, et un tronçon convergent se rétrécissant dans le sens de l'écoulement en aval du corps de catalyseur, le corps de guidage de l'écoulement étant disposé dans le tronçon divergent et/ou dans le tronçon convergent, remarquable par les caractéristiques suivantes :
a) le corps déguidage de l'écoulement (4, 5 ; 24) est constitué d'un grand nombre de canaux disposés les uns à côté des autres et/ou les uns dans les autres, dans lesquels un fluide peut passer et qui présentent tous, ou au moins en partie, dans le tronçon divergent une section transversale croissante dans le sens de l'écoulement ou, dans le tronçon convergent, une section transversale décroissante dans le sens de l'écoulement,
b) la surface ouverte de la section transversale du corps de guidage de l'écoulement est sensiblement plus grande d'un côté que de l'autre, par exemple plus de deux fois plus grande et, de préférence, environ 4 à 6 fois plus grande.
2. Corps de guidage de l'écoulement suivant la revendication 1, caractérisé en ce que les surfaces ouvertes de la section transversale des canaux individuels du corps de guidage de l'écoulement (4, 5 ; 24) sont, du côté ayant les surfaces de section transversale les plus petites, à peu près aussi grandes que les surfaces ouvertes de la section transversale des canaux du corps à catalyseur (3 ; 23) de type en nid d'abeille, et de préférence même considérablement plus grandes.
3. Corps de guidage de l'écoulement suivant la revendication 1 ou 2, caractérisé en ce qu'entre le corps de guidage de l'écoulement (4, 5 ; 24) et le corps à catalyseur (3 ; 23) est prévu un intervalle (6, 7 ; 26) de 5 à 30 mm environ, servant au tourbillonnement du gaz d'échappement.
4. Corps de guidage de l'écoulement suivant la revendication 1, 2 ou 3, caractérisé en ce que les canaux du corps de guidage de l'écoulement (4 ; 24), qui présentent une section transversale croissante, ont un angle d'ouverture (α) qui est plus petit que l'angle pour lequel l'écoulement se détache des parois, en étant, par exemple pour des sections transversales simples, inférieur à π/17 et, de préférence, inférieur à π/24.
5. Corps de guidage de l'écoulement suivant la revendication 1, 2 ou 3, caractérisé en ce que les canaux du corps de guidage de l'écoulement (4 ; 24), qui présentent une section transversale croissante, ont un angle d'ouverture (α) tel qu'un écoulement turbulent est juste maintenu dans les canaux ou à l'extrémité des canaux.
6. Corps de guidage de l'écoulement suivant l'une des revendications précédentes, caractérisé en ce que les canaux qui présentent une section transversale croissante sont constitués de tôles planes (35) et ondulées (31), empilées ou enroulées en alternance, dans lesquelles les tôles ondulées (31) sont fendues à partir du côté d'effluence (33) à peu près le long des sommets des ondulations ou des creux des ondulations, jusqu'à proximité du côté d'affluence (32) et sont écartées dans le sens de l'écoulement, les flancs de l'ondulation du côté d'affluence (32) étant cependant moins abrupts que du côté d'effluence (33).
7. Corps de guidage de l'écoulement suivant l'une des revendications précédentes, caractérisé en ce que le corps de guidage de l'écoulement est constitué d'un enroulement ou d'un empilement d'au moins deux tôles (71, 72) ondulées ayant à peu près la même longueur d'onde et des amplitudes très différentes, les ondulations du côté de la surface de la section transversale la plus petite s'emboîtant les unes dans les autres, mais étant séparées de l'autre côté par une couche intermédiaire (73) constituée d'une bande de tôle plane et étroite.
8. Corps de guidage de l'écoulement suivant la revendication 1, 2, 3 ou 4, caractérisé en ce que le corps de guidage de l'écoulement (4, 5 ; 24) est composé de modules de canaux individuels (91 ; 101 ; 111) préfabriqués, de section transversale croissante ou décroissante, de préférence de modules métalliques fabriqués en tôle.
9. Corps de guidage de l'écoulement suivant la revendication 6, 7 ou 8, caractérisé en ce que les tôles (31, 35 ; 71, 72, 73) sont soudées entre elles au moins sur une partie des points de contact.
10. Corps de guidage de l'écoulement suivant l'une des revendications précédentes, caractérisé en ce que le corps de guidage de l'écoulement (4, 5 ; 24) est revêtu d'une matière catalytiquement active.
11. Corps de guidage de l'écoulement suivant la revendication 10, caractérisé en ce que la matière catalytiquement active a dans le tronçon divergent des propriétés telles, sur le corps de guidage de l'écoulement (4 ; 24), qu'elle améliore notamment les propriétés de démarrage à froid, c'est-à-dire le début des réactions catalytiques aux basses températures.
12. Procédé de fabrication d'un corps de guidage de l'écoulement suivant la revendication 1, caractérisé par les stades suivants :
a) une tôle ondulée (31), ayant des flancs aussi abrupts que possible, est fendue (34) d'un côté (33), le long de tout ou d'une partie des sommets des ondulations ou des creux des ondulations, jusqu'à environ l'autre côté (32), par exemple jusqu'à 10 mm,
b) la tôle (31) est écartée de manière plus forte du côté fendu (33) que du côté non fendu (32),
c) la tôle écartée (31) est enroulée ou empilée en alternance avec une tôle (35) plane en un bloc à plusieurs canaux (36), et est reliée par une technique de jointoiement, de préférence par soudage à haute température, sur au moins une partie des points de contact.
EP88907684A 1987-10-02 1988-08-23 Agencement catalyseur avec corps de guidage de l'ecoulement Expired - Lifetime EP0386013B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873733402 DE3733402A1 (de) 1987-10-02 1987-10-02 Katalysatoranordnung mit stroemungsleitkoerper
DE3733402 1987-10-02

Publications (2)

Publication Number Publication Date
EP0386013A1 EP0386013A1 (fr) 1990-09-12
EP0386013B1 true EP0386013B1 (fr) 1991-11-13

Family

ID=6337512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88907684A Expired - Lifetime EP0386013B1 (fr) 1987-10-02 1988-08-23 Agencement catalyseur avec corps de guidage de l'ecoulement

Country Status (7)

Country Link
US (2) US5103641A (fr)
EP (1) EP0386013B1 (fr)
JP (1) JPH0791972B2 (fr)
DE (2) DE3733402A1 (fr)
ES (1) ES2009047A6 (fr)
RU (1) RU1839696C (fr)
WO (1) WO1989002978A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6190784B1 (en) 1996-06-25 2001-02-20 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Conical honeycomb body with longitudinal structures

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110560A (en) * 1987-11-23 1992-05-05 United Technologies Corporation Convoluted diffuser
NO172508C (no) * 1987-11-23 1993-07-28 United Technologies Corp Diffusor for katalytiske omformingssystemer
DE4104637A1 (de) * 1990-02-16 1991-08-29 Bischoff Erhardt Gmbh Co Kg Katalysator fuer kraftfahrzeuge
DE4117364A1 (de) * 1991-05-28 1992-12-03 Duerrwaechter E Dr Doduco Verfahren zum verkuerzen der anspringverzoegerung eines katalysators und vorrichtung zur durchfuehrung des verfahrens
JPH05146685A (ja) * 1991-11-30 1993-06-15 Mazda Motor Corp 排気ガス浄化用触媒及びその製造方法
DE4200807C2 (de) * 1992-01-15 1994-03-03 Daimler Benz Ag Anordnung zur Reinigung von Abgasen
JP2640571B2 (ja) * 1992-04-03 1997-08-13 エミテク・ゲゼルシャフト・フュール・エミシオーンテクノロギー・ミット・ベシュレンクテル・ハフツング 円錐形のハニカム状の本体
JPH06167213A (ja) * 1992-08-10 1994-06-14 Ford Motor Co エンジン排ガス装置のための触媒コンバータ
US5427746A (en) * 1994-03-08 1995-06-27 W. R. Grace & Co.-Conn. Flow modification devices for reducing emissions from thermal voc oxidizers
JPH0814033A (ja) * 1994-06-24 1996-01-16 Caterpillar Inc 内燃エンジン用モジュール触媒コンバータとマフラー
US5548955A (en) * 1994-10-19 1996-08-27 Briggs & Stratton Corporation Catalytic converter having a venturi formed from two stamped components
DE4445557A1 (de) * 1994-12-20 1996-06-27 Emitec Emissionstechnologie Doppelwandiges Gehäuse, insbesondere für Abgas-Katalysatoren von Kraftfahrzeugen
US6220021B1 (en) * 1995-05-19 2001-04-24 Silentor Notox A/S Silencer with incorporated catalyst
US5771683A (en) * 1995-08-30 1998-06-30 Southwest Research Institute Active porous medium aftertreatment control system
SE9602688L (sv) * 1996-07-08 1998-01-09 Volvo Ab Katalytisk brännkammare, samt förfarande för tändning och reglering av den katalytiska brännkammaren
CA2267628C (fr) 1996-09-30 2007-05-15 Silentor Notox A/S Silencieux pour flux de gaz
US6520286B1 (en) 1996-09-30 2003-02-18 Silentor Holding A/S Silencer and a method of operating a vehicle
DE19704144A1 (de) * 1997-02-04 1998-08-06 Emitec Emissionstechnologie Extrudierter Wabenkörper, insbesondere Katalysator-Trägerkörper, mit verstärkter Wandstruktur
JP3610720B2 (ja) * 1997-03-03 2005-01-19 日産自動車株式会社 メタル触媒担体の構造
US5916134A (en) * 1997-09-10 1999-06-29 Industrial Technology Research Institute Catalytic converter provided with vortex generator
DE19819202A1 (de) * 1998-04-29 1999-11-04 Emitec Emissionstechnologie Konischer Wabenkörper und Verfahren zu seiner Herstellung
DE19838703A1 (de) * 1998-08-26 2000-03-02 Zeuna Staerker Kg Vorrichtung zur Strömungsberuhigung in der Abgasleitung eines Verbrennungsmotors
KR100308952B1 (ko) * 1999-05-10 2001-09-26 이계안 오블리크 클로즈 커플드 캐털리스트 출구측 컨넥터
DE19938854C5 (de) * 1999-08-17 2006-12-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Vorrichtung zur Verringerung des Stickoxidanteils in einem Abgas einer Verbrennungskraftmaschine
US6713025B1 (en) * 1999-09-15 2004-03-30 Daimlerchrysler Corporation Light-off and close coupled catalyst
DE10000568C2 (de) * 2000-01-10 2003-08-14 Emitec Emissionstechnologie Thermisch isolierte Abgasreinigungsanlage
EP1230978B1 (fr) * 2001-02-12 2005-09-28 Ecocat Oy Procédé de fabrication d'un elément de garnissage en tole metallique ondulée pour réacteur
US6622482B2 (en) 2001-06-27 2003-09-23 Environmental Control Corporation Combined catalytic muffler
US7018590B2 (en) * 2001-06-27 2006-03-28 Environmental Control Corporation Reverse flow catalytic muffler
DE10130867B4 (de) * 2001-06-30 2014-05-28 Gerd, Dr.-Ing. Gaiser Vorrichtung zur Reinigung von Abgasen aus Verbrennungsmotoren
JP2003080083A (ja) * 2001-09-14 2003-03-18 Calsonic Kansei Corp メタル触媒担体
GB2381218B (en) * 2001-10-25 2004-12-15 Eminox Ltd Gas treatment apparatus
US6712869B2 (en) * 2002-02-27 2004-03-30 Fleetguard, Inc. Exhaust aftertreatment device with flow diffuser
DE10226282A1 (de) * 2002-06-13 2003-12-24 Emitec Emissionstechnologie Nicht-zylindrischer Katalysator-Trägerkörper sowie Werkzeug und Verfahren zu seiner Herstellung
US6745562B2 (en) 2002-09-16 2004-06-08 Kleenair Systems, Inc. Diverter for catalytic converter
US20040141889A1 (en) * 2003-01-16 2004-07-22 Visteon Global Technologies, Inc. Catalytic converter comprising inner heat shield with noise suppression
US7189446B2 (en) * 2003-07-11 2007-03-13 Corning Incorporated Curved honeycomb article, EUV apparatus having a curved honeycomb article, and method of making a curved honeycomb article
JP2005177736A (ja) * 2003-11-28 2005-07-07 Calsonic Kansei Corp メタル担体
GB0329095D0 (en) * 2003-12-16 2004-01-14 Johnson Matthey Plc Exhaust system for lean burn IC engine including particulate filter
DE102005014385A1 (de) 2005-03-24 2006-09-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Abgaswärmeübertrager, insbesondere Abgaskühler für Abgasrückführung in Kraftfahrzeugen
DE102005020045A1 (de) * 2005-04-29 2006-11-02 Arvinmeritor Emissions Technologies Gmbh Verbindungselement zwischen einem Gehäuse und einem Abgasrohr
US20070144158A1 (en) * 2005-12-22 2007-06-28 Girard James W Exhaust dispersion device
DE102006024778B3 (de) * 2006-03-02 2007-07-19 J. Eberspächer GmbH & Co. KG Statischer Mischer und Abgasbehandlungseinrichtung
CA2584955C (fr) * 2006-05-15 2014-12-02 Sulzer Chemtech Ag Melangeur statique
WO2008034933A1 (fr) * 2006-09-20 2008-03-27 Ecocat Oy Égaliseur D'ÉCOULEMENT DE GAZ D'ÉCHAPPEMENT
US7805932B2 (en) * 2006-09-29 2010-10-05 Perkins Engines Company Limited Flow assembly for an exhaust system
US20100307145A1 (en) * 2007-06-15 2010-12-09 Choon Nam Son Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas
FR2920472B1 (fr) * 2007-09-04 2010-02-19 Renault Sas Dispositif d'echappement de moteur thermique.
US7971433B2 (en) * 2008-02-14 2011-07-05 Ford Global Technologies, Llc Helical exhaust passage
US20100050874A1 (en) * 2008-08-29 2010-03-04 Walter Cullen Lucas Exhaust after treatment system and method
DE102010056281A1 (de) 2010-12-24 2012-06-28 Volkswagen Ag Abgasanlage mit HC-Adsorber und parallelem Abgaskatalysator sowie Fahrzeug mit einer solchen Abgasanlage
US9109466B2 (en) * 2011-07-22 2015-08-18 The Board Of Trustees Of The Leland Stanford Junior University Diffuser with backward facing step having varying step height
DE102011117090B4 (de) 2011-10-27 2023-01-26 Volkswagen Aktiengesellschaft Abgasreinigungsvorrichtung
FI124030B (en) 2012-06-26 2014-02-14 Outotec Oyj Process for producing a separating element and separating element
FI123834B (en) 2012-06-26 2013-11-15 Outotec Oyj Process for making a gutter and gutter
FI124674B (en) 2012-06-26 2014-11-28 Outotec Oyj Solvent extraction procedure and solvent extraction basin
FI123831B (en) 2012-06-26 2013-11-15 Outotec Oyj Solvent extraction clarifier tank arrangement
FI123835B (en) 2012-06-26 2013-11-15 Outotec Oyj Arrangement for a pool for solvent extraction
FI123803B (en) 2012-06-26 2013-10-31 Outotec Oyj Process for preparing a solvent extraction pool and solvent extraction pool
US9599012B2 (en) * 2012-12-30 2017-03-21 General Electric Company Charge air cooler cover and turbocharger bracket
CN103322833A (zh) * 2013-06-19 2013-09-25 上海宝钢节能技术有限公司 一种换热效率高、寿命长的换热器
FR3012519A3 (fr) * 2013-10-25 2015-05-01 Renault Sa Catalyseur pour une ligne d'echappement d'un flux de gaz
DE102015207573B4 (de) * 2015-04-24 2023-07-06 Ford Global Technologies, Llc Brennkraftmaschine mit kombiniertem Abgasnachbehandlungssystem
JP6855884B2 (ja) * 2017-04-04 2021-04-07 富士通株式会社 排気浄化装置、内燃装置、発電装置及び自動車
US10774717B2 (en) * 2017-11-01 2020-09-15 Imagine Tf, Llc Structures for catalytic converters
DE102019207065B4 (de) * 2019-05-15 2021-05-20 Vitesco Technologies GmbH Ringkatalysator
KR20210071578A (ko) * 2019-12-06 2021-06-16 현대자동차주식회사 차량용 촉매 컨버터
DE102021115885A1 (de) 2021-06-18 2022-12-22 Endress+Hauser Flowtec Ag Strömungsgleichrichter

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1279524A (fr) * 1959-11-23 1961-12-22 Universal Oil Prod Co Appareil pour la mise en contact avec une matière solide d'un fluide tel que les gaz d'échappement d'un moteur
US3302394A (en) * 1965-11-24 1967-02-07 Du Pont Exhaust manifold reactor
FR2182614B1 (fr) * 1972-03-17 1978-05-05 Louyot Comptoir Lyon Alemand
GB1437114A (en) * 1972-09-23 1976-05-26 Daimler Benz Ag Exhaust pipe apparatus comprising a catalyst element
US3953176A (en) * 1973-05-22 1976-04-27 Texas Instruments Incorporated Catalytic converter
JPS5022118A (fr) * 1973-06-29 1975-03-10
US3929420A (en) * 1973-08-31 1975-12-30 Minnesota Mining & Mfg Dual cross-flow canister
US3969083A (en) * 1973-11-26 1976-07-13 Maremont Corporation Catalytic converter for purifying gases
DE2429002A1 (de) * 1974-06-15 1976-01-08 Bosch Gmbh Robert Abgasreaktor
US3964875A (en) * 1974-12-09 1976-06-22 Corning Glass Works Swirl exhaust gas flow distribution for catalytic conversion
US4039294A (en) * 1975-05-21 1977-08-02 Mayer Edward A Filter for internal combustion exhaust gases
JPS54125912U (fr) * 1978-02-24 1979-09-03
DE3012182A1 (de) * 1979-04-03 1980-10-23 Engelhard Min & Chem Katalytisches system mit nichteinheitlicher zellengroesse und verfahren zur oxidation von gasen unter verwendung dieses katalytischen systems
DE2924592C2 (de) * 1979-06-19 1983-05-26 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Verfahren zum Herstellen einer Trägermatrix für einen katalytischen Reaktor zur Abgasreinigung bei Brennkraftmaschinen von Kraftfahrzeugen
JPS5940516B2 (ja) * 1981-11-09 1984-10-01 東京電機工業株式会社 水質管理装置
DE3430399A1 (de) * 1984-08-17 1986-02-20 Voest-Alpine St. Aegyd AG, St. Aegyd am Neuwalde Katalytische abgasreinigungseinrichtung
DE3430400C2 (de) * 1984-08-17 1986-06-26 Voest-Alpine St. Aegyd AG, St. Aegyd am Neuwalde Katalytische Abgasreinigungseinrichtung
US4634459A (en) * 1985-02-12 1987-01-06 FEV Forschungsgesellschaft fur Energie-Technik und Verbrennungsmotoren GmbH Particle filtration and removal system
DE3536315A1 (de) * 1985-10-11 1987-04-16 Sueddeutsche Kuehler Behr Katalysatoranordnung zur reinigung von abgasen, insbesondere einer brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6190784B1 (en) 1996-06-25 2001-02-20 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Conical honeycomb body with longitudinal structures

Also Published As

Publication number Publication date
ES2009047A6 (es) 1989-08-16
JPH0791972B2 (ja) 1995-10-09
US5150573A (en) 1992-09-29
DE3733402A1 (de) 1989-04-13
RU1839696C (ru) 1993-12-30
WO1989002978A1 (fr) 1989-04-06
DE3866244D1 (de) 1991-12-19
JPH02502110A (ja) 1990-07-12
EP0386013A1 (fr) 1990-09-12
US5103641A (en) 1992-04-14

Similar Documents

Publication Publication Date Title
EP0386013B1 (fr) Agencement catalyseur avec corps de guidage de l'ecoulement
EP0151229B1 (fr) Matrice pour réacteur catalytique
EP0483256B1 (fr) Element alveole avec des surfaces internes de guidage du flux, en particulier elements de catalyseurs pour vehicules a moteur
EP0484364B1 (fr) Corps en nid d'abeilles, a aretes internes d'entree, notamment support de catalyseur pour vehicule automobile
EP0542775B1 (fr) Corps metallique monolithique en nid d'abeilles a nombre variable de canaux
DE19680093B4 (de) Wabenkörper mit von einem Fluid durchströmbaren Kanälen von unterschiedlichem Strömungswiderstand
EP1743697B1 (fr) Bande métallique avec microstructure
EP0542805B1 (fr) Corps en nid d'abeilles ayant des canaux a sections transversales diverses, notamment corps de support de catalyseur
WO1997049905A1 (fr) Corps en nid d'abeilles conique a structures longitudinales
WO1994013939A1 (fr) Convertisseur catalytique a deux ou plusieurs corps en nid-d'abeilles contenus dans une enveloppe tubulaire, et son procede de fabrication
EP0186801A2 (fr) Matrice porteuse en particulier pour un réacteur catalytique pour la purification des gaz d'échappement
DE4014215A1 (de) Abgasreinigungsvorrichtung
EP1089819B1 (fr) Corps en nids d'abeilles metallique monolithique avec un nombre de canaux variable
EP0635097A1 (fr) Corps conique en nid d'abeilles.
DE4313187A1 (de) Metallischer Trägerkörper für Abgasreinigungskatalysator-Material
WO1991010048A1 (fr) Conduite de gaz d'echappement avec un support de catalyseur recevant un ecoulement helicoïdal
DE3923094A1 (de) Katalysator-traegerkoerper
EP0959988B1 (fr) Corps en nid-d'abeilles avec zone de section transversale encadree a l'interieur, en particulier pour petits moteurs
EP2864604B1 (fr) Corps en nid d'abeilles conique avec des canaux en orientation radiale et oblique
EP0969929B1 (fr) Corps en nid d'abeilles, notamment corps de support de catalyseur, avec une paroi a structure renforcee
DE10009124A1 (de) Katalysator zur Reinigung eines Abgases einer Verbrennungskraftmaschine
WO2000070205A1 (fr) Corps en nids d'abeilles et son procede de fabrication
DE4243079A1 (de) Wabenkörper und Herstellungsverfahren für einen Wabenkörper
WO2000070206A1 (fr) Corps alveolaire
EP0894949A2 (fr) Insert pour silencieux ou catalysateurs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900126

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19910409

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 3866244

Country of ref document: DE

Date of ref document: 19911219

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920824

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EUG Se: european patent has lapsed

Ref document number: 88907684.0

Effective date: 19930307

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070904

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070723

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20070823

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070821

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20080822

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20080822