EP3102816B1 - Arrangement for recirculating exhaust gas - Google Patents
Arrangement for recirculating exhaust gas Download PDFInfo
- Publication number
- EP3102816B1 EP3102816B1 EP15700764.2A EP15700764A EP3102816B1 EP 3102816 B1 EP3102816 B1 EP 3102816B1 EP 15700764 A EP15700764 A EP 15700764A EP 3102816 B1 EP3102816 B1 EP 3102816B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- plastics material
- nozzle
- arrangement according
- bush
- 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.)
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- 230000003134 recirculating effect Effects 0.000 title 1
- 229920003023 plastic Polymers 0.000 claims description 89
- 239000004033 plastic Substances 0.000 claims description 89
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 20
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 43
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/18—Thermal insulation or heat protection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
Definitions
- the present invention relates to an arrangement for introducing recirculated exhaust gas into a fresh air system of an internal combustion engine.
- the invention also relates to an internal combustion engine whose fresh air system is equipped with such an arrangement.
- an external exhaust gas recirculation is also used, in which exhaust gas is taken from an exhaust system of the internal combustion engine and fed to a fresh air system of the internal combustion engine.
- the exhaust system leads in a conventional manner, the resulting in the combustion in the combustion chambers of the internal combustion engine exhaust gases from the internal combustion engine.
- the fresh air system supplies fresh air to these combustion chambers for new combustion processes. Upstream of these combustion chambers recirculated exhaust gas is now introduced into the fresh air system. In the area of such a discharge point, an arrangement of the type mentioned is used.
- an inlet connection has a connection flange which is arranged via a seal on an inner side of a mounting member, wherein the mounting member is arranged on the outside of a channel of the fresh air system, such that it closes a connection opening of the channel through which the inlet connection with the connection flange and the seal projects into the channel.
- a coolant channel is arranged on an outer side of the mounting member.
- the invention is based on the general idea to set the inlet nozzle with a nozzle flange outside of a plastic component of the fresh air system and to fix it with the help of screws, the screws are passed through plastic bushes.
- the nozzle flange can preferably be supported on the plastic component via the plastic bushes. This makes it possible in particular to avoid direct contact between the inlet nozzle and the plastic component. As a result, thermal stresses between the preferably metallic inlet nozzle or the preferably metallic nozzle flange on the one hand and the plastic component on the other hand can be reduced.
- the invention proposes to use the preferably metallic inlet nozzle in a connection opening, which is formed in the plastic component of the fresh air system.
- the inlet nozzle may be inserted into the connection opening in such a way that it protrudes into the interior of the plastic component, so that the recirculated exhaust gas can be supplied to the fresh air flow at a distance from the plastic component.
- the inlet nozzle is expediently cylindrical.
- the inlet connection can furthermore be axially open so that the recirculated exhaust gas can enter the fresh air flow axially with respect to the inlet connection.
- the inlet nozzle may optionally have at least one radial opening within the plastic component, so that the recirculated exhaust gas with respect the inlet can also flow radially into the fresh air stream.
- the inlet connection piece has the connection flange, which according to a preferred embodiment can be integrally formed on the inlet connection piece and accordingly formed with the same material.
- a preferably metallic exhaust gas recirculation line is flanged to a side facing away from the plastic component side.
- the nozzle flange serves on the one hand to connect the exhaust gas recirculation line to the inlet connection.
- the plastic component of the fresh air system has a flange portion which encloses the connection opening in the circumferential direction.
- the nozzle flange is now arranged on the outside of this flange region, so that the nozzle flange thus on the other hand also serves to fasten the inlet nozzle to the plastic component.
- the nozzle flange has a plurality of bushing openings, in each of which a plastic bushing is inserted.
- the nozzle flange is now screwed by means of several, preferably metallic, screws with the flange, said screws are each passed through one of the plastic sockets.
- the nozzle flange can be arranged at a distance from the flange region.
- efficient thermal decoupling results, since heat transmission through heat conduction is precluded and only heat transfer by thermal radiation is possible, which is significantly lower.
- the inlet nozzle has an outer cross section which is smaller than an opening cross section or inner cross section of the connection opening, so that the inlet connection is radially spaced from an opening edge with respect to the nozzle longitudinal direction.
- the inlet nozzle has no direct contact with the plastic component.
- a seal surrounding the connection opening can be arranged between the connection flange and the flange region.
- This seal prevents leaks and false flows and in particular leakage of the recirculated exhaust gas into the environment.
- the seal can be used according to an advantageous development as a spacer, if it is equipped with appropriate stability, so that it can be used for spacing the neck flange of the flange.
- the respective plastic bushing may have a bushing flange with which the respective plastic bushing is supported on the neck flange on a side facing away from the flange region.
- the associated screw is supported with a screw head on said bushing flange either indirectly via a disk or directly.
- the respective plastic bushing can be inserted into the associated bushing opening and latched to the neck flange on a side of the neck flange facing the flange region.
- the plastic bushing may have correspondingly radially resilient latching elements which yield radially inwardly upon insertion of the respective plastic bushing into the associated bushing opening and emerge again from the respective bushing opening when the plastic bushing is completely inserted on the opposite side, thereby springing back radially outwards Behind the neck flange on this side.
- the socket opening with a Self-tapping internal thread to be cut when screwing the plastic bushing into the outside of the plastic bushing.
- conventional, mutually complementary threads may be formed on the bushing opening and the plastic bushing.
- the respective plastic bush can also be fixed via a press fit in the bushing opening on the neck flange.
- the respective plastic bushing is supported axially on the end face on the flange area.
- the plastic bushing protrudes axially over the nozzle flange with respect to the longitudinal direction of the inlet nozzle, so that an axial spacing between the nozzle flange and the flange region is already achieved via the plastic bushing.
- At least one spacer element can be arranged between the nozzle flange and the flange region, which encloses, for example, one of the plastic bushes in an annular manner. In this way, the desired axial distance between the nozzle flange and flange area can be realized particularly easily.
- the plastic bushings can be made of a duroplastic.
- Thermosets can be realized with a relatively high thermal resistance.
- the plastic component of the fresh air system can have a collar which projects into the connection opening and protrudes outward, from which a component flange forming the flange region emerges.
- said collar and associated component flange can be formed integrally, that is, of the same material, on the plastic component.
- the component flange can be arranged free-standing with respect to the remaining plastic component.
- an air gap insulation is achieved between the plastic component and the component flange, which additionally improves the thermal decoupling.
- a desired axial distance between the component flange and the plastic component can be realized in a particularly simple manner in that the collar protrudes in the axial direction outwardly from the plastic component so that the desired axial distance is established.
- the screws can be designed to be self-tapping or self-tapping, so that they can penetrate into the plastic of the flange area when screwed in without corresponding screw openings on the flange area having to be formed beforehand for this purpose. This simplifies the assembly.
- the flange region can have a greater wall thickness in screw regions, which in each case lie opposite one of the plastic bushings, than in regions adjacent thereto. This ensures that the screws are comparatively deep in the material of the Flange area can be screwed, which improves the anchoring of the screws on or in the flange area.
- An internal combustion engine is equipped on the one hand in a conventional manner with a fresh air system for supplying fresh air to combustion chambers of the internal combustion engine, with an exhaust system for discharging exhaust gas from the combustion chambers and with an exhaust gas recirculation system for returning exhaust gas from the exhaust system via a discharge point in the fresh air system.
- the internal combustion engine is equipped in the region of the point of introduction with an arrangement of the aforementioned type in order to be able to initiate the recirculated exhaust gas into the fresh air system.
- an internal combustion engine 1 includes an engine block 2 that includes a plurality of combustion chambers 3. These are usually formed by cylinders, in each of which a piston is arranged adjustable in stroke.
- the internal combustion engine also has a fresh air system 4 for supplying fresh air to the combustion chambers 3.
- a corresponding fresh air flow 5 is in Fig. 1 indicated by an arrow.
- the internal combustion engine 1 also includes an exhaust system 6 for discharging exhaust gas from the combustion chambers 3.
- a corresponding exhaust gas stream 7 is indicated by an arrow. With the help of an exhaust gas recirculation system 8, a portion of the exhaust gas from the exhaust system 6 to the fresh air system 4 can be returned.
- an exhaust gas recirculation line 9 is connected via a removal point 10 to the exhaust system 6 and via a discharge point 11 to the fresh air system 4.
- an arrangement 12 is realized, which serves for introducing the recirculated exhaust gas into the fresh air system 4.
- an exhaust gas recirculation cooler 13 may be arranged, which in turn may be incorporated into a cooling circuit 14.
- Corresponding Fig. 2 comprises such an arrangement 12, with the aid of which the exhaust gas to be recirculated is introduced into the fresh air system 4 during operation of the internal combustion engine 2, an inlet connection 15, which is preferably made of a metal or of a metal alloy.
- the inlet connection 15 is in a connection opening 16 used, which is formed in a plastic component 17 of the fresh air system 4.
- the plastic component 17 is, for example, an in Fig. 1 designated 18 fresh air duct or a in Fig. 1 19 designated fresh air manifold or another component of the fresh air system. 4
- the inlet nozzle 15 is expediently cylindrical, so that it has a straight longitudinal central axis 20.
- the longitudinal central axis 20 defines within the arrangement 12 a in Fig. 2 indicated by a double arrow axial direction 42 to which it is parallel.
- the inlet pipe 15 is equipped with a nozzle flange 21.
- the nozzle flange 21 is formed of the same material at the inlet nozzle 15.
- the nozzle flange 21 is radial with respect to the axial direction 42 from the inlet connection 15.
- the exhaust gas recirculation line 9 of the exhaust gas recirculation system 8 is flanged.
- the exhaust gas recirculation line 9 is equipped for this purpose with a conduit flange 22, which may be integrally formed on the exhaust gas recirculation line 9.
- the exhaust gas recirculation line 9 is preferably made of metal or of a metal alloy.
- a flange seal 23 is arranged axially between the nozzle flange 21 and the conduit flange 22.
- the plastic member 17 is provided with a flange portion 24 enclosing the connection opening 16 in the circumferential direction.
- the nozzle flange 21 is now arranged on the outside, ie on a side facing away from the interior 25 of the plastic component 17, on this flange region 24.
- the nozzle flange 21 is also equipped with a plurality of bushing openings 26, of which in Fig. 2 however, only one is recognizable. It is expedient to insert a plastic bushing 27 into each bushing opening 26.
- screws 28 which are preferably made of metal or of a metal alloy, is the nozzle flange 21 bolted to the flange portion 24, wherein the respective screw 28 is passed through each such a plastic bushing 27.
- the nozzle flange 21 is arranged axially spaced from the flange region 24. Furthermore, the inlet connection 15 is arranged so as to be radially spaced from an opening edge 29 enclosing the connection opening 16. Accordingly, the inlet connection 15 together with its connection flange 21 has no direct contact with the plastic component 17 or with the flange region 24.
- a gasket 30 configured to surround the port 16 in the circumferential direction.
- This seal 30 may preferably be configured as a spacer element, so that it is sufficiently stable to space the nozzle flange 21 from the flange region 24.
- the inlet pipe 15 is arranged axially free-standing in the interior 25 of the plastic component 17 and axially open. Furthermore, it may have at least one radial opening 31 in the interior 25, through which exhaust gas can also exit radially from the inlet connection 15 and enter the interior 25.
- the plastic component 17 has in the embodiment shown here a collar 32 which surrounds the connection opening 16 in the circumferential direction and which projects axially outwards from the remaining plastic component 17. From an end of the collar 32 remote from the remaining plastic component 17, a component flange 33 extends, which extends radially with respect to the axial direction 42 and forms the flange region 24. This component flange 33 is axially spaced from the rest of the plastic component 17 by the collar 32, so that it is arranged free-standing with respect to the remaining plastic component 17.
- the plastic bush 27 may have a bushing flange 34 with which the plastic bushing 27 is supported on the neck flange 21 on a side remote from the flange region 24.
- the associated screw 28 can now as in the Fig. 2 and 3e shown to be supported with a screw head 35 directly on the bushing flange 34.
- an indirect support of the screw head 35 via a corresponding, not shown here disc on the bushing flange 34 is possible.
- the plastic bushing 27 may be pressed with the socket opening 26, which, for example, in the embodiments of Fig. 2 and 3e the case may be. Likewise, the plastic bushing 27 can be inserted into the associated bushing opening 26 and latched on a side facing the flange portion 24 of the nozzle flange 21 with the nozzle flange 21, which in Fig. 3d is shown. In this case, the plastic bushing 27 has a plurality of latching hooks 36, which are spaced apart in the circumferential direction, for example, axially protrude from the bushing flange 34 and are radially resilient.
- the plastic bushing 27 is supported on the flange region 24 axially frontally. This is done in the embodiments of Fig. 2 . 3a and 3c to 3e each with the end remote from the bushing flange 34.
- the plastic bushing 27 is mounted in such a way that it is arranged with its bushing flange 34 between the neck flange 21 and the flange region 24 and thereby at the same time serves as a spacer element.
- a spacer element which in the in Fig. 3b is formed by the bush flange 34, 27 in accordance with in the region of the respective plastic bushing Fig.
- a separate spacer element 37 may be provided, which axially between the nozzle flange 21st and the flange portion 24 is arranged.
- the spacer element 37 is designed annular, such that it surrounds the respective plastic bushing 27 annular.
- the plastic bushing 27 can also be screwed into the associated bushing opening 26.
- the plastic bushing 27 may have on its outer side an external thread 38, which cooperates with an internal thread 39 which is formed on an edge 40 which surrounds the bushing opening 26. It is also possible to form a self-tapping internal thread 39 on this edge 40 so that the external thread 38 is formed when the plastic bushing 27 is screwed into the associated bushing opening 26.
- the plastic bushing 27 is made of a thermoset, whereby it has a relatively high thermal resistance.
- the screws 28 used to fix the arrangement are expediently designed to be self-tapping or self-tapping.
- a screw region 41 which is axially aligned with a plastic bushing 27, with a wall thickness 43 measured parallel to the axial direction 42 which is greater than a wall thickness 44, that of the flange region 24 in regions 45 adjacent to the respective screw region 41 has.
- the screw 28 can penetrate deeper into the material of the flange region 24.
- the screw 28 extends within the screw range further than the wall thickness 44 of the flange portion 24 outside the screw 41.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
Die vorliegende Erfindung betrifft eine Anordnung zum Einleiten von rückgeführtem Abgas in eine Frischluftanlage einer Brennkraftmaschine. Die Erfindung betrifft außerdem eine Brennkraftmaschine, deren Frischluftanlage mit einer derartigen Anordnung ausgestattet ist.The present invention relates to an arrangement for introducing recirculated exhaust gas into a fresh air system of an internal combustion engine. The invention also relates to an internal combustion engine whose fresh air system is equipped with such an arrangement.
Zur Reduzierung von Schadstoffemissionen sowie zur Reduzierung eines Kraftstoffverbrauchs ist es bei modernen Brennkraftmaschinen bekannt, einen Teil der bei der Verbrennung des Kraftstoffs in Brennräumen entstehenden Abgase zu den Brennräumen zurückzuführen. Neben einer internen Abgasrückführung kommt dabei auch eine externe Abgasrückführung zum Einsatz, bei der Abgas von einer Abgasanlage der Brennkraftmaschine entnommen wird und einer Frischluftanlage der Brennkraftmaschine zugeführt wird. Die Abgasanlage führt in üblicher Weise die bei der Verbrennung in den Brennräumen der Brennkraftmaschine entstehenden Abgase von der Brennkraftmaschine ab. Die Frischluftanlage führt diesen Brennräumen Frischluft für neue Verbrennungsvorgänge zu. Stromauf dieser Brennräume wird nun rückgeführtes Abgas in die Frischluftanlage eingeleitet. Im Bereich einer derartigen Einleitstelle kommt eine Anordnung der eingangs genannten Art zum Einsatz.In order to reduce pollutant emissions and to reduce fuel consumption, it is known in modern internal combustion engines to return a portion of the resulting during combustion of the fuel in combustion chambers exhaust gases to the combustion chambers. In addition to an internal exhaust gas recirculation, an external exhaust gas recirculation is also used, in which exhaust gas is taken from an exhaust system of the internal combustion engine and fed to a fresh air system of the internal combustion engine. The exhaust system leads in a conventional manner, the resulting in the combustion in the combustion chambers of the internal combustion engine exhaust gases from the internal combustion engine. The fresh air system supplies fresh air to these combustion chambers for new combustion processes. Upstream of these combustion chambers recirculated exhaust gas is now introduced into the fresh air system. In the area of such a discharge point, an arrangement of the type mentioned is used.
Problematisch bei einer derartigen Einleitstelle ist dabei der Umstand, dass Abgase und somit in der Regel auch rückgeführte Abgase vergleichsweise hohe Temperaturen aufweisen können, während Frischluft im Vergleich dazu relativ niedrige Temperaturen besitzt. Dementsprechend wird eine Frischluftanlage weitgehend mit Materialien aus Kunststoff hergestellt. Im Unterschied dazu wird eine Abgasanlage und in der Regel auch eine Abgasrückführanlage weitgehend aus metallischen Materialien hergestellt. An der Einleitstelle, über die das rückgeführte Abgas der Frischluft zugeführt wird, treffen somit heiße Bauteile, die insbesondere aus metallischen Werkstoffen hergestellt sind, auf vergleichsweise kalte Bauteile, die regelmäßig aus Kunststoff bestehen. Hierdurch kann es an der Einleitstelle zu thermischen Belastungen und thermisch bedingten Spannungen und somit zu einer erhöhten Beschädigungsgefahr kommen.The problem with such a point of introduction is the fact that exhaust gases and thus, as a rule, recirculated exhaust gases can have comparatively high temperatures, whereas fresh air has relatively low temperatures in comparison thereto. Accordingly, a fresh air system is largely made with plastic materials. In contrast, it will an exhaust system and usually also an exhaust gas recirculation system largely made of metallic materials. At the point of introduction, via which the recirculated exhaust gas is supplied to the fresh air, thus hot components, which are made in particular of metallic materials, meet comparatively cold components, which regularly consist of plastic. This can lead to thermal loads and thermally induced stresses and thus to an increased risk of damage at the point of introduction.
Aus der
Aus der
Aus der
Die vorliegende Erfindung beschäftigt sich mit dem Problem, für eine Anordnung der eingangs genannten Art eine verbesserte oder zumindest eine andere Ausführungsform anzugeben, die sich insbesondere durch einen einfachen und preiswerten Aufbau auszeichnet und dabei insbesondere eine ausreichende thermische Entkopplung zwischen der Abgasrückführanlage und der Frischluftanlage besitzt.From the
From the
The present invention is concerned with the problem of providing for an arrangement of the type mentioned in an improved or at least another embodiment, in particular by a simple and low cost design and in particular has sufficient thermal decoupling between the exhaust gas recirculation system and the fresh air system.
Dieses Problem wird erfindungsgemäß durch den Gegenstand des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.
Die Erfindung beruht auf dem allgemeinen Gedanken, den Einleitstutzen mit einem Stutzenflansch außen an einem Kunststoffbauteil der Frischluftanlage anzusetzen und mit Hilfe von Schrauben daran zu fixieren, wobei die Schrauben durch Kunststoffbuchsen hindurchgeführt sind. Dabei kann sich der Stutzenflansch vorzugsweise über die Kunststoffbuchsen am Kunststoffbauteil abstützen. Hierdurch ist es insbesondere möglich, einen direkten Kontakt zwischen dem Einleitstutzen und dem Kunststoffbauteil zu vermeiden. Hierdurch lassen sich thermische Spannungen zwischen dem bevorzugt metallischen Einleitstutzen bzw. dem vorzugsweise metallischen Stutzenflansch einerseits und dem Kunststoffbauteil andererseits reduzieren.The invention is based on the general idea to set the inlet nozzle with a nozzle flange outside of a plastic component of the fresh air system and to fix it with the help of screws, the screws are passed through plastic bushes. In this case, the nozzle flange can preferably be supported on the plastic component via the plastic bushes. This makes it possible in particular to avoid direct contact between the inlet nozzle and the plastic component. As a result, thermal stresses between the preferably metallic inlet nozzle or the preferably metallic nozzle flange on the one hand and the plastic component on the other hand can be reduced.
Im Einzelnen wird erfindungsgemäß vorgeschlagen, den bevorzugt metallischen Einleitstutzen in eine Anschlussöffnung einzusetzen, die im Kunststoffbauteil der Frischluftanlage ausgebildet ist. Dabei kann der Einleitstutzen derart in die Anschlussöffnung eingesetzt sein, dass er in das Innere des Kunststoffbauteils vorsteht, so dass das rückgeführte Abgas beabstandet zum Kunststoffbauteil dem Frischluftstrom zugeführt werden kann. Der Einleitstutzen ist zweckmäßig zylindrisch gestaltet. Der Einleitstutzen kann ferner axial offen sein, so dass das rückgeführte Abgas bezüglich des Einleitstutzens axial in den Frischluftstrom eintreten kann. Der Einleitstutzen kann optional innerhalb des Kunststoffbauteils wenigstens eine radiale Öffnung aufweisen, so dass das rückgeführte Abgas bezüglich des Einleitstutzens auch radial in den Frischluftstrom einströmen kann. Ferner weist der Einleitstutzen den Stutzenflansch auf, der gemäß einer bevorzugten Ausführungsform integral am Einleitstutzen ausgeformt sein kann und dementsprechend mit diesem materialeinheitlich gebildet ist. An diesen Stutzenflansch ist an einer vom Kunststoffbauteil abgewandten Seite eine vorzugsweise metallische Abgasrückführleitung angeflanscht. Somit dient der Stutzenflansch einerseits zur Anbindung der Abgasrückführleitung an den Einleitstutzen. Das Kunststoffbauteil der Frischluftanlage besitzt einen Flanschbereich, der die Anschlussöffnung in der Umfangsrichtung umschließt. Der Stutzenflansch ist nun außen an diesem Flanschbereich angeordnet, so dass der Stutzenflansch somit andererseits auch zum Befestigen des Einleitstutzens am Kunststoffbauteil dient. Hierzu weist der Stutzenflansch mehrere Buchsenöffnungen auf, in die jeweils eine Kunststoffbuchse eingesetzt ist. Der Stutzenflansch ist nun mittels mehrerer, vorzugsweise metallischer, Schrauben mit dem Flanschbereich verschraubt, wobei diese Schrauben jeweils durch eine der Kunststoffbuchsen hindurchgeführt sind.In detail, the invention proposes to use the preferably metallic inlet nozzle in a connection opening, which is formed in the plastic component of the fresh air system. In this case, the inlet nozzle may be inserted into the connection opening in such a way that it protrudes into the interior of the plastic component, so that the recirculated exhaust gas can be supplied to the fresh air flow at a distance from the plastic component. The inlet nozzle is expediently cylindrical. The inlet connection can furthermore be axially open so that the recirculated exhaust gas can enter the fresh air flow axially with respect to the inlet connection. The inlet nozzle may optionally have at least one radial opening within the plastic component, so that the recirculated exhaust gas with respect the inlet can also flow radially into the fresh air stream. Furthermore, the inlet connection piece has the connection flange, which according to a preferred embodiment can be integrally formed on the inlet connection piece and accordingly formed with the same material. At this nozzle flange, a preferably metallic exhaust gas recirculation line is flanged to a side facing away from the plastic component side. Thus, the nozzle flange serves on the one hand to connect the exhaust gas recirculation line to the inlet connection. The plastic component of the fresh air system has a flange portion which encloses the connection opening in the circumferential direction. The nozzle flange is now arranged on the outside of this flange region, so that the nozzle flange thus on the other hand also serves to fasten the inlet nozzle to the plastic component. For this purpose, the nozzle flange has a plurality of bushing openings, in each of which a plastic bushing is inserted. The nozzle flange is now screwed by means of several, preferably metallic, screws with the flange, said screws are each passed through one of the plastic sockets.
Entsprechend einer vorteilhaften Ausführungsform kann der Stutzenflansch vom Flanschbereich beabstandet angeordnet sein. Durch einen bezüglich der Axialrichtung des Einleitstutzens axialen Abstand zwischen Stutzenflansch und Flanschbereich ergibt sich eine effiziente thermische Entkopplung, da eine Wärmeübertragung durch Wärmeleitung dadurch ausgeschlossen ist und nur noch eine Wärmeübertragung durch Wärmestrahlung möglich ist, die deutlich geringer ausfällt. Zweckmäßig kann außerdem vorgesehen sein, dass der Einleitstutzen einen Außenquerschnitt besitzt, der kleiner ist als ein Öffnungsquerschnitt oder Innenquerschnitt der Anschlussöffnung, so dass der Einleitstutzen gegenüber einem Öffnungsrand hinsichtlich der Stutzenlängsrichtung radial beabstandet ist. Somit besitzt der Einleitstutzen keinen direkten Kontakt zum Kunststoffbauteil.According to an advantageous embodiment, the nozzle flange can be arranged at a distance from the flange region. By means of an axial distance between the nozzle flange and the flange area with respect to the axial direction of the inlet nozzle, efficient thermal decoupling results, since heat transmission through heat conduction is precluded and only heat transfer by thermal radiation is possible, which is significantly lower. Appropriately, it can also be provided that the inlet nozzle has an outer cross section which is smaller than an opening cross section or inner cross section of the connection opening, so that the inlet connection is radially spaced from an opening edge with respect to the nozzle longitudinal direction. Thus, the inlet nozzle has no direct contact with the plastic component.
Bei einer anderen Ausführungsform kann zwischen dem Stutzenflansch und dem Flanschbereich eine die Anschlussöffnung umschließende Dichtung angeordnet sein. Diese Dichtung verhindert zum einen Leckagen und Fehlströmungen und insbesondere ein Austreten des rückgeführten Abgases in die Umgebung. Zum anderen kann die Dichtung gemäß einer vorteilhaften Weiterbildung als Distanzelement genutzt werden, wenn sie mit entsprechender Stabilität ausgestattet wird, so dass sie zum Beabstanden des Stutzenflansches vom Flanschbereich verwendet werden kann.In another embodiment, a seal surrounding the connection opening can be arranged between the connection flange and the flange region. This seal prevents leaks and false flows and in particular leakage of the recirculated exhaust gas into the environment. On the other hand, the seal can be used according to an advantageous development as a spacer, if it is equipped with appropriate stability, so that it can be used for spacing the neck flange of the flange.
Gemäß einer anderen Ausführungsform kann die jeweilige Kunststoffbuchse einen Buchsenflansch aufweisen, mit dem die jeweilige Kunststoffbuchse an einer vom Flanschbereich abgewandten Seite am Stutzenflansch abgestützt ist. Insbesondere kann dann vorgesehen sein, dass die zugehörige Schraube mit einem Schraubenkopf an besagtem Buchsenflansch entweder indirekt über eine Scheibe oder direkt abgestützt ist. Somit lassen sich die Fixierungskräfte der Schraube besonders einfach über die Kunststoffbuchse auf den Stutzenflansch übertragen.According to another embodiment, the respective plastic bushing may have a bushing flange with which the respective plastic bushing is supported on the neck flange on a side facing away from the flange region. In particular, it can then be provided that the associated screw is supported with a screw head on said bushing flange either indirectly via a disk or directly. Thus, the fixing forces of the screw can be very easily transmitted via the plastic bushing to the nozzle flange.
Bei einer anderen Ausführungsform kann die jeweilige Kunststoffbuchse in die zugehörige Buchsenöffnung eingesteckt sein und an einer dem Flanschbereich zugewandten Seite des Stutzenflansches mit dem Stutzenflansch verrastet sein. Hierzu kann die Kunststoffbuchse entsprechende, radial federnde Rastelemente aufweisen, die beim Einstecken der jeweiligen Kunststoffbuchse in die zugehörige Buchsenöffnung radial nach innen federnd nachgeben und bei vollständig eingesteckter Kunststoffbuchse an der gegenüberliegenden Seite aus der jeweiligen Buchsenöffnung wieder austreten und dabei radial nach außen zurückfedern, um den Stutzenflansch an dieser Seite zu hintergreifen.In another embodiment, the respective plastic bushing can be inserted into the associated bushing opening and latched to the neck flange on a side of the neck flange facing the flange region. For this purpose, the plastic bushing may have correspondingly radially resilient latching elements which yield radially inwardly upon insertion of the respective plastic bushing into the associated bushing opening and emerge again from the respective bushing opening when the plastic bushing is completely inserted on the opposite side, thereby springing back radially outwards Behind the neck flange on this side.
Alternativ ist es ebenso möglich, die jeweilige Kunststoffbuchse in die zugehörige Buchsenöffnung einzuschrauben. Hierzu kann die Buchsenöffnung mit einem selbstschneidenden Innengewinde ausgestattet sein, das sich beim Eindrehen der Kunststoffbuchse in die Außenseite der Kunststoffbuchse einschneidet. Ebenso können übliche, zueinander komplementäre Gewinde an der Buchsenöffnung und der Kunststoffbuchse ausgebildet sein.Alternatively, it is also possible to screw the respective plastic bushing into the associated bushing opening. For this purpose, the socket opening with a Self-tapping internal thread to be cut when screwing the plastic bushing into the outside of the plastic bushing. Likewise, conventional, mutually complementary threads may be formed on the bushing opening and the plastic bushing.
Alternativ kann die jeweilige Kunststoffbuchse auch über einen Presssitz in der Buchsenöffnung am Stutzenflansch fixiert sein.Alternatively, the respective plastic bush can also be fixed via a press fit in the bushing opening on the neck flange.
Vorzugsweise stützt sich die jeweilige Kunststoffbuchse axial stirnseitig am Flanschbereich ab. Insbesondere steht dabei die Kunststoffbuchse bezüglich der Längsrichtung des Einleitstutzens axial über dem Stutzenflansch vor, so dass bereits über die Kunststoffbuchse eine axiale Beabstandung zwischen dem Stutzenflansch und dem Flanschbereich erreicht wird.Preferably, the respective plastic bushing is supported axially on the end face on the flange area. In particular, the plastic bushing protrudes axially over the nozzle flange with respect to the longitudinal direction of the inlet nozzle, so that an axial spacing between the nozzle flange and the flange region is already achieved via the plastic bushing.
Bei einer anderen Ausführungsform kann wenigstens ein Distanzelement zwischen dem Stutzenflansch und dem Flanschbereich angeordnet sein, das beispielsweise eine der Kunststoffbuchsen ringförmig umschließt. Auf diese Weise lässt sich der gewünschte Axialabstand zwischen Stutzenflansch und Flanschbereich besonders einfach realisieren.In another embodiment, at least one spacer element can be arranged between the nozzle flange and the flange region, which encloses, for example, one of the plastic bushes in an annular manner. In this way, the desired axial distance between the nozzle flange and flange area can be realized particularly easily.
Bevorzugt können die Kunststoffbuchsen aus einem Duroplast hergestellt sein. Duroplaste lassen sich mit einer relativ hohen thermischen Beständigkeit realisieren.Preferably, the plastic bushings can be made of a duroplastic. Thermosets can be realized with a relatively high thermal resistance.
Gemäß einer anderen Ausführungsform kann das Kunststoffbauteil der Frischluftanlage einen die Anschlussöffnung einfassenden, nach außen abstehenden Kragen aufweisen, von dem ein den Flanschbereich bildender Bauteilflansch ausgeht. Insbesondere können besagter Kragen und zugehöriger Bauteilflansch integral, also materialeinheitlich am Kunststoffbauteil ausgeformt sein. Durch die Verwendung eines derartigen Bauteilflansches wird am Kunststoffbauteil ein speziell für die Montage des Stutzenflansches geeigneter Abschnitt bereitgestellt, was die Realisierung der hier vorgestellten Anordnung vereinfacht. Des Weiteren wird eine direkte thermische Beaufschlagung des Kunststoffbauteils vermieden, da über den Stutzenflansch nur der Bauteilflansch thermisch beaufschlagt wird und auch das aufgrund der verwendeten Kunststoffbuchsen nur in reduziertem Umfang. Somit kann die thermische Entkopplung mit Hilfe des Kragens und des daran ausgebildeten Bauteilflansches erheblich verbessert werden.According to another embodiment, the plastic component of the fresh air system can have a collar which projects into the connection opening and protrudes outward, from which a component flange forming the flange region emerges. In particular, said collar and associated component flange can be formed integrally, that is, of the same material, on the plastic component. By the Use of such a component flange is provided on the plastic component a suitable for the mounting of the nozzle flange portion, which simplifies the realization of the arrangement presented here. Furthermore, a direct thermal loading of the plastic component is avoided, since only the component flange is thermally acted upon via the nozzle flange and also due to the plastic bushes used only to a reduced extent. Thus, the thermal decoupling with the help of the collar and the component flange formed thereon can be significantly improved.
Gemäß einer besonders vorteilhaften Weiterbildung kann der Bauteilflansch gegenüber dem übrigen Kunststoffbauteil freistehend angeordnet sein. Durch diese Beabstandung des Bauteilflansches vom übrigen Kunststoffbauteil wird zwischen dem Kunststoffbauteil und dem Bauteilflansch eine Luftspaltisolation erreicht, was die thermische Entkopplung zusätzlich verbessert. Ein gewünschter Axialabstand zwischen Bauteilflansch und Kunststoffbauteil lässt sich besonders einfach dadurch realisieren, dass der Kragen in der Axialrichtung soweit nach außen vom Kunststoffbauteil absteht, dass sich der gewünschte Axialabstand einstellt.According to a particularly advantageous development, the component flange can be arranged free-standing with respect to the remaining plastic component. As a result of this spacing of the component flange from the remaining plastic component, an air gap insulation is achieved between the plastic component and the component flange, which additionally improves the thermal decoupling. A desired axial distance between the component flange and the plastic component can be realized in a particularly simple manner in that the collar protrudes in the axial direction outwardly from the plastic component so that the desired axial distance is established.
Bevorzugt können die Schrauben selbstfurchend oder selbstschneidend ausgestaltet sein, so dass sie beim Einschrauben in den Kunststoff des Flanschbereichs eindringen können, ohne dass hierzu entsprechende Schrauböffnungen am Flanschbereich vorher ausgebildet werden müssen. Hierdurch vereinfacht sich die Montage.Preferably, the screws can be designed to be self-tapping or self-tapping, so that they can penetrate into the plastic of the flange area when screwed in without corresponding screw openings on the flange area having to be formed beforehand for this purpose. This simplifies the assembly.
Bei einer anderen vorteilhaften Ausführungsform kann der Flanschbereich in Schraubbereichen, die jeweils einer der Kunststoffbuchsen gegenüberliegen, eine größere Wandstärke aufweisen als in daran angrenzenden Bereichen. Hierdurch wird erreicht, dass die Schrauben vergleichsweise tief in den Werkstoff des Flanschbereiches eingeschraubt werden können, was die Verankerung der Schrauben am bzw. im Flanschbereich verbessert.In another advantageous embodiment, the flange region can have a greater wall thickness in screw regions, which in each case lie opposite one of the plastic bushings, than in regions adjacent thereto. This ensures that the screws are comparatively deep in the material of the Flange area can be screwed, which improves the anchoring of the screws on or in the flange area.
Eine erfindungsgemäße Brennkraftmaschine ist einerseits in üblicher Weise mit einer Frischluftanlage zum Zuführen von Frischluft zu Brennräumen der Brennkraftmaschine, mit einer Abgasanlage zum Abführen von Abgas von den Brennräumen und mit einer Abgasrückführanlage zum Rückführen von Abgas aus der Abgasanlage über eine Einleitstelle in die Frischluftanlage ausgestattet. Andererseits ist die Brennkraftmaschine im Bereich der Einleitstelle mit einer Anordnung der vorstehend genannten Art ausgestattet, um das rückgeführte Abgas in die Frischluftanlage einleiten zu können.An internal combustion engine according to the invention is equipped on the one hand in a conventional manner with a fresh air system for supplying fresh air to combustion chambers of the internal combustion engine, with an exhaust system for discharging exhaust gas from the combustion chambers and with an exhaust gas recirculation system for returning exhaust gas from the exhaust system via a discharge point in the fresh air system. On the other hand, the internal combustion engine is equipped in the region of the point of introduction with an arrangement of the aforementioned type in order to be able to initiate the recirculated exhaust gas into the fresh air system.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Komponenten beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.
Es zeigen, jeweils schematisch,
- Fig. 1
- eine schaltplanartige Prinzipdarstellung einer Brennkraftmaschine, die mit einer Anordnung zum Einleiten von rückgeführtem Abgas in eine Frischluftanlage der Brennkraftmaschine ausgestattet ist,
- Fig. 2
- eine stark vereinfachte Schnittansicht der Anordnung,
- Fig. 3
- eine Detailansicht der Anordnung im Bereich einer Kunststoffbuchse bei verschiedenen Ausführungsformen a bis e.
- Fig. 1
- a circuit diagram-like schematic diagram of an internal combustion engine, which is equipped with an arrangement for introducing recirculated exhaust gas into a fresh air system of the internal combustion engine,
- Fig. 2
- a greatly simplified sectional view of the arrangement,
- Fig. 3
- a detailed view of the arrangement in the region of a plastic bushing in various embodiments a to e.
Entsprechend
Entsprechend
Der Einleitstutzen 15 ist zweckmäßig zylindrisch ausgestaltet, so dass er eine geradlinige Längsmittelachse 20 besitzt. Die Längsmittelachse 20 definiert innerhalb der Anordnung 12 eine in
Das Kunststoffbauteil 17 ist mit einem Flanschbereich 24 ausgestattet, der die Anschlussöffnung 16 in der Umfangsrichtung umschließt. Der Stutzenflansch 21 ist nun außen, also an einer vom Inneren 25 des Kunststoffbauteils 17 abgewandten Seite an diesem Flanschbereich 24 angeordnet. Der Stutzenflansch 21 ist außerdem mit mehreren Buchsenöffnungen 26 ausgestattet, von denen in
Gemäß
Im Beispiel ist axial zwischen dem Stutzenflansch 21 und dem Flanschbereich 24 eine Dichtung 30 angeordnet, die so konfiguriert ist, dass sie die Anschlussöffnung 16 in der Umfangsrichtung umschließt. Diese Dichtung 30 kann vorzugsweise als Distanzelement ausgestaltet sein, so dass sie hinreichend stabil ist, um den Stutzenflansch 21 vom Flanschbereich 24 zu beabstanden.In the example, axially between the
Der Einleitstutzen 15 ist im Inneren 25 des Kunststoffbauteils 17 axial freistehend angeordnet und axial offen. Ferner kann er im Inneren 25 zumindest eine Radialöffnung 31 aufweisen, durch die Abgas auch radial aus dem Einleitstutzen 15 austreten und in das Innere 25 eintreten kann.The
Das Kunststoffbauteil 17 besitzt bei der hier gezeigten Ausführungsform einen Kragen 32, der die Anschlussöffnung 16 in der Umfangsrichtung einfasst und der vom übrigen Kunststoffbauteil 17 axial nach außen absteht. Von einem vom übrigen Kunststoffbauteil 17 entfernten Ende des Kragens 32 geht ein Bauteilflansch 33 aus, der sich bezüglich der Axialrichtung 42 radial erstreckt und der den Flanschbereich 24 bildet. Dieser Bauteilflansch 33 ist durch den Kragen 32 vom übrigen Kunststoffbauteil 17 axial beabstandet, so dass er gegenüber dem übrigen Kunststoffbauteil 17 freistehend angeordnet ist.The
Nachfolgend wird insbesondere mit Bezug auf die
Die Kunststoffbuchse 27 kann mit der Buchsenöffnung 26 verpresst sein, was beispielsweise bei den Ausführungsformen der
Bei allen hier gezeigten Ausführungsformen stützt sich die Kunststoffbuchse 27 am Flanschbereich 24 axial stirnseitig ab. Dies erfolgt bei den Ausführungsformen der
Gemäß
Zweckmäßig ist die Kunststoffbuchse 27 aus einem Duroplast hergestellt, wodurch sie eine relativ hohe thermische Beständigkeit besitzt.Suitably, the
Die zum Fixieren der Anordnung verwendeten Schrauben 28 sind zweckmäßig selbstfurchend bzw. selbstschneidend ausgestaltet. Um die Verankerung der jeweiligen Schraube 28 im Flanschbereich 24 zu verbessern, ist es gemäß
Claims (14)
- Arrangement for introducing returned exhaust gas into a fresh air system (4) of an internal combustion engine (1),- having a metal introduction nozzle (15) which is inserted into a connection opening (16) which is constructed in a plastics material component (17) of the fresh air system (4),- wherein the introduction nozzle (15) has a nozzle flange (21) to which a metal exhaust gas return line (9) is flanged,- wherein the plastics material component (17) has a flange region (24) which surrounds the connection opening (16),- wherein the nozzle flange (15) is arranged at the outer side of the flange region (24) and has a plurality of bush openings (26) in which a plastics material bush (27) is inserted in each case,- wherein the nozzle flange (21) is screwed to the flange region (24) by means of a plurality of screws (28) which are each guided through one of the plastics material bushes (27).
- Arrangement according to claim 1,
characterised in
that the nozzle flange (21) is spaced apart from the flange region (24). - Arrangement according to claim 1 or 2,
characterised in
that a seal (30) which surrounds the connection opening (16) is arranged between the support flange (21) and the flange region (24). - Arrangement according to claim 3,
characterised in
that this seal (30) is constructed as a spacer element for spacing the nozzle flange (21) apart from the flange region (24). - Arrangement according to any one of claims 1 to 4,
characterised in
that the respective plastics material bush (27) has a bush flange (34) by means of which it is supported on the nozzle flange (21) at a side facing away from the flange region (24). - Arrangement according to any one of claims 1 to 5,
characterised in
that the respective plastics material bush (27) is inserted in the associated bush opening (26) and is engaged with the nozzle flange (21) at a side of the nozzle flange (21) facing the flange region (24). - Arrangement according to any one of claims 1 to 5,
characterised in
that the respective plastics material bush (27) is screwed into the associated bush opening (26). - Arrangement according to any one of claims 1 to 7,
characterised in
that the respective plastics material bush (27) is supported axially at the end face on the flange region (24). - Arrangement according to any one of claims 1 to 8,
characterised in
that there is arranged between the nozzle flange (21) and flange region (24) at least one spacer element (37) which surrounds one of the plastics material bushes (27) in an annular manner. - Arrangement according to any one of claims 1 to 9,
characterised in
that the respective plastics material bush (27) is produced from a thermosetting plastics material. - Arrangement according to any one of claims 1 to 10,
characterised in
that the plastics material component (17) has a collar (32) which surrounds the connection opening (16) and which protrudes outwards and from which a component flange (33) which forms the flange region (24) extends. - Arrangement according to claim 11,
characterised in
that the component flange (33) is spaced apart from the plastics material component (17). - Arrangement according to any one of claims 1 to 12,
characterised in
that the respective screw (28) is constructed to be self-tapping. - Arrangement according to any one of claims 1 to 13,
characterised in
that the flange region (24) has in screw regions (41) which are each opposite one of the plastics material bushes (27) a greater wall thickness (43) than in adjacent regions (45).
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Application Number | Priority Date | Filing Date | Title |
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DE102014201935.4A DE102014201935A1 (en) | 2014-02-04 | 2014-02-04 | Arrangement for exhaust gas recirculation |
PCT/EP2015/051301 WO2015117835A1 (en) | 2014-02-04 | 2015-01-23 | Arrangement for recirculating exhaust gas |
Publications (2)
Publication Number | Publication Date |
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EP3102816A1 EP3102816A1 (en) | 2016-12-14 |
EP3102816B1 true EP3102816B1 (en) | 2017-12-27 |
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EP15700764.2A Active EP3102816B1 (en) | 2014-02-04 | 2015-01-23 | Arrangement for recirculating exhaust gas |
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EP (1) | EP3102816B1 (en) |
DE (1) | DE102014201935A1 (en) |
WO (1) | WO2015117835A1 (en) |
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EP3760855A1 (en) * | 2019-07-01 | 2021-01-06 | Valeo Termico S.A. | Connection assembly for a device |
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FR2739897B1 (en) * | 1995-10-13 | 1997-12-12 | Magneti Marelli France | ANNULAR CARBIDE GAS RECYCLING DIFFUSER, FOR INTERNAL COMBUSTION ENGINE |
DE29611814U1 (en) * | 1996-07-06 | 1997-11-06 | Robert Bosch Gmbh, 70469 Stuttgart | Connecting device |
FR2753256B1 (en) * | 1996-09-06 | 1998-12-11 | Le Profil Ind | DEVICE FOR FIXING AND CONNECTING A VALVE FOR PROVIDING RECYCLED EXHAUST GASES |
US5970960A (en) * | 1996-09-18 | 1999-10-26 | Nissan Motor Co., Ltd. | Exhaust gas recirculation system of internal combustion engine |
DE19933030A1 (en) * | 1999-07-15 | 2001-01-18 | Mann & Hummel Filter | Fluid introduction for a hot fluid in a cavity structure |
JP4474785B2 (en) * | 2001-03-28 | 2010-06-09 | アイシン精機株式会社 | Exhaust gas recirculation system introduction structure |
US6810865B2 (en) | 2002-03-15 | 2004-11-02 | Mann & Hummel Gmbh | Exhaust gas recycle (EGR) assembly |
EP2402585B1 (en) | 2009-02-12 | 2015-12-16 | MAHLE Behr GmbH & Co. KG | Device for recirculating exhaust gas for an internal combustion engine |
-
2014
- 2014-02-04 DE DE102014201935.4A patent/DE102014201935A1/en not_active Withdrawn
-
2015
- 2015-01-23 EP EP15700764.2A patent/EP3102816B1/en active Active
- 2015-01-23 WO PCT/EP2015/051301 patent/WO2015117835A1/en active Application Filing
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Publication number | Publication date |
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DE102014201935A1 (en) | 2015-08-20 |
WO2015117835A1 (en) | 2015-08-13 |
EP3102816A1 (en) | 2016-12-14 |
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