EP1015750B1 - System for recirculating exhaust gas in an internal combustion engine - Google Patents

System for recirculating exhaust gas in an internal combustion engine Download PDF

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Publication number
EP1015750B1
EP1015750B1 EP98951390A EP98951390A EP1015750B1 EP 1015750 B1 EP1015750 B1 EP 1015750B1 EP 98951390 A EP98951390 A EP 98951390A EP 98951390 A EP98951390 A EP 98951390A EP 1015750 B1 EP1015750 B1 EP 1015750B1
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EP
European Patent Office
Prior art keywords
exhaust gas
tube
cylinder head
insert
intake tube
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
EP98951390A
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German (de)
French (fr)
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EP1015750A1 (en
Inventor
Thomas Jessberger
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Mann and Hummel GmbH
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Filterwerk Mann and Hummel GmbH
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Publication of EP1015750A1 publication Critical patent/EP1015750A1/en
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Classifications

    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • 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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/44—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078—Connections of intake systems to the engine
    • F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means
    • 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
    • F02M26/20—Feeding recirculated exhaust gases directly into the combustion chambers or into the intake runners
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line

Definitions

  • the invention relates to an arrangement for returning Exhaust gas in an internal combustion engine of the genus Main claim.
  • Thermal peaks occur especially in such arrangements in the areas of the seals, usually from Plastic, at the connection of the connecting line for the recirculated exhaust gas and in areas close to the inflow opening are opposite. It is often difficult here due to the relatively small cross sections and relative to dissipate sufficient heat over long distances. In many applications related to direct injection Motors is also used because of the expected return rate of the exhaust gas (up to 50%) often the demand for one cylinder-selective introduction of the exhaust gas posed what leads to further thermal problems.
  • the invention has for its object an arrangement of the type mentioned in the introduction so that an optimal Lowering the temperature is possible.
  • the solid heat-conducting part a tubular insert that integrates inside the intake pipe is.
  • This insert lies with an end face under thermal contact on the cylinder head.
  • This heat transfer can also be increased if necessary be that the end face resting on the cylinder head of the insert has an enlarged diameter.
  • the tubular connecting line for the recirculated exhaust gas through the wall of the intake pipe led out.
  • the connecting line and the insert are gas-tightly connected to each other, which means none Seals between the connecting line and the intake pipe are necessary.
  • the inflowing exhaust gas bounces thus on the inner wall of the cooled insert and places therefore no increased thermal stress on the plastic of the intake pipe.
  • a recess in the intake pipe is to form a radial distance from the connecting pipe and thus to prevent a possible thermal load on the intake pipe in this area.
  • FIG 1 is a cylinder head 1 of an internal combustion engine with the essential parts shown here.
  • the exhaust gas in the connecting line 4 has one due to the combustion in the engine correspondingly high temperature, which the intake pipe and the neighboring aggregates possibly damage, as these are for normal air temperatures are designed and mostly made of plastic are made.
  • connection flange 2 for the recirculated exhaust gas is a Cooling channel 5 connected through which for the engine coolant required anyway according to arrows 6a (inlet) and 6b (drain) flows.
  • this cooling channel 5 around the connecting flange 2 and thus around the connecting pipe 4 for the recirculated exhaust gas in shown another view.
  • the flange contour after the Figure 2 is with two screws 7 on the plastic intake pipe 2 attached. In the middle of this flange contour is the connecting pipe 4 inserted.
  • FIG. 1 An exemplary embodiment can be seen in FIG which a manifold 10 for recirculated exhaust gas on a Cylinder block 11 is arranged.
  • the recirculated exhaust gas flows through the cross section 12 of the distributor pipe 10 and is in each case via tubes 13 and corresponding connection flanges 14 passed into an intake pipe 15.
  • the distributor pipe 10 to the cylinder head 11 can preferably already existing screw connections here 16, possibly via a metal sleeve 17, for the intake pipe 15 can be used.
  • cooling channel 18 in FIG. 4 arranged through which the coolant flows.
  • a cooling channel 19 also at least partially integrated into the distributor pipe 10 be, with additional seals here 20 are necessary.
  • the one has metallic insert 21, which in the plastic intake pipe 22 is attached such that an end End 23 is in thermal contact with the cylinder head 24.
  • a cooling channel 25 is also arranged in the cylinder head 24.
  • a connecting tube 26 for the side recirculated exhaust gas introduced firmly and gas-tight.
  • To the surrounding Plastic of the intake pipe 22 is here free distance 27 attached because of the relatively high temperatures of the connecting pipe 26, the plastic of the intake pipe 22 should not damage.
  • To cool the insert 21 still too is to improve according to Figure 7 the surface of the front End 23 of the insert enlarged so that an even better one Thermal contact between the insert 21 and the cylinder head 24 is reached.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A system for recirculating exhaust gas in an internal combustion engine in which a connecting line for the recirculated exhaust gas is connected to an air intake tube with cooling elements arranged in between. The cooling element may be, for example, a cooling channel for liquid coolant integrated into the flange connecting the connecting line to the air intake tube, or it may be another heat conductive element.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Anordnung zur Rückführung von Abgas bei einem Verbrennungsmotor nach der Gattung des Hauptanspruchs.The invention relates to an arrangement for returning Exhaust gas in an internal combustion engine of the genus Main claim.

Bei einer aus der DE 30 34 971 C2 bekannten Anordnung dieser Art werden Abgase des Verbrennungsmotors vom Abgasrohr dem Ansaugkanal für den Verbrennungsmotor wieder zugeführt. Das Verbindungsrohr ist hier zur Kühlung des rückgeführten Abgases über weite Bereiche in einen Wärmetauscher eingebettet. In an arrangement known from DE 30 34 971 C2 This type of exhaust gases from the internal combustion engine from the exhaust pipe the intake duct for the internal combustion engine again fed. The connecting pipe is here for cooling the recycled exhaust gas over large areas in a heat exchanger embedded.

Es ist für sich gesehen auch bekannt, dass das rückgeführte Abgasrohres mit einem Flansch über zwei Schrauben am Ansaugrohr aus Kunststoff befestigt wird. Um eine thermische Entkopplung des Abgasrohres von dem Ansaugrohr zu bewirken, wird hier im Bereich des Flansches mittels eines Diffusorrohres Mischluft zur Kühlung zugeführt. Mit dieser Anordnung kann die Abgastemperatur im Bereich des Flansches von ca. 450°C auf ca. 125°C bei einer Rückführrate von ca. 20% abgesenkt werden.It is also known in itself that the returned Exhaust pipe with a flange over two screws is attached to the plastic intake pipe. To one Thermal decoupling of the exhaust pipe from the intake pipe to effect is here in the area of the flange mixed air for cooling is supplied to a diffuser tube. With this arrangement, the exhaust gas temperature in the range Flange from approx. 450 ° C to approx. 125 ° C at a return rate can be reduced by approx. 20%.

Thermische Spitzen treten bei solchen Anordnungen speziell in den Bereichen der Dichtungen, in der Regel aus Kunststoff, am Anschluss der Verbindungsleitung für das rückgeführte Abgas und in Bereichen auf, die der Einströmöffnung gegenüberliegen. Hierbei ist es oft schwierig aufgrund der relativ kleinen Querschnitte und relativ langen Wege ausreichend wärme abzuführen. Bei vielen Anwendungsfällen im Zusammenhang mit direkteinspritzenden Motoren wird auch wegen der zu erwartenden Rückführrate des Abgases (bis zu 50%) häufig die Forderung nach einer zylinderselektiven Einleitung des Abgases gestellt, was zu weitere thermischen Problemen führt.Thermal peaks occur especially in such arrangements in the areas of the seals, usually from Plastic, at the connection of the connecting line for the recirculated exhaust gas and in areas close to the inflow opening are opposite. It is often difficult here due to the relatively small cross sections and relative to dissipate sufficient heat over long distances. In many applications related to direct injection Motors is also used because of the expected return rate of the exhaust gas (up to 50%) often the demand for one cylinder-selective introduction of the exhaust gas posed what leads to further thermal problems.

Aus der DE A 197 40 998 ist ein Abgasrückführsystem für eine Brennkraftmaschine dargestellt. Bei diesem Abgasrückführsystem ist ein Kunststoffansaugkrümmer vorgesehen der mit einem Kühlgehäuse verbunden wird. Das System benutzt dabei innere und äußere Gehäusehälften die miteinander verschraubt werden. Dieser Aufbau ist aufwendig und stellt hohe Anforderungen an die Genauigkeit der Herstellung.From DE A 197 40 998 is an exhaust gas recirculation system for an internal combustion engine shown. With this exhaust gas recirculation system a plastic intake manifold is provided which is connected to a cooling housing. The system uses the inner and outer halves of the housing together be screwed. This structure is complex and places high demands on the accuracy of production.

Aufgabenstellungtask

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung der eingangs genannten Art so fortzubilden, dass eine optimale Absenkung der Temperatur möglich ist.The invention has for its object an arrangement of the type mentioned in the introduction so that an optimal Lowering the temperature is possible.

Vorteile der ErfindungAdvantages of the invention

Gemäß der Erfindung ist das massive wärmeleitende Teil ein rohrförmiges Insert, das innen in das Ansaugrohr integriert ist. Mit einer Stirnseite liegt dieses Insert unter Wärmekontakt am Zylinderkopf an. Mit dieser Anordnung kann auf einfache Weise bei der Montage des Ansaugrohres an den Zylinderkopf eine guter Wärmeübergang zwischen dem Insert, das vorzugsweise aus Metall ist, und dem Zylinderkopf geschaffen werden. Durch diesen Wärmeübergang kann die Wärmeenergie, die durch das Abgas zugeführt wird in den gekühlten Zylinderkopf abgeführt werden.According to the invention, the solid heat-conducting part a tubular insert that integrates inside the intake pipe is. This insert lies with an end face under thermal contact on the cylinder head. With this arrangement can be done easily when installing the intake manifold good heat transfer between the cylinder head the insert, which is preferably made of metal, and the cylinder head can be created. Through this heat transfer can be the thermal energy supplied by the exhaust gas will be dissipated into the cooled cylinder head.

Dieser Wärmeübergang kann bei Bedarf auch dadurch vergrößert werden, dass die am Zylinderkopf anliegende Stirnseite des Inserts eine Durchmessererweiterung aufweist.This heat transfer can also be increased if necessary be that the end face resting on the cylinder head of the insert has an enlarged diameter.

Seitlich am Insert ist die rohrartige Verbindungsleitung für das rückgeführte Abgas durch die Wand des Ansaugrohres herausgeführt. Die Verbindungsleitung und das Insert sind hierbei gasdicht miteinander verbunden, wodurch keine Dichtungen zwischen der Verbindungsleitung und dem Ansaugrohr notwendig sind. Das einströmende Abgas prallt somit auf die Innenwand des gekühlten Inserts und stellt daher keine erhöhte thermische Belastung für den Kunststoff des Ansaugrohres dar.On the side of the insert is the tubular connecting line for the recirculated exhaust gas through the wall of the intake pipe led out. The connecting line and the insert are gas-tightly connected to each other, which means none Seals between the connecting line and the intake pipe are necessary. The inflowing exhaust gas bounces thus on the inner wall of the cooled insert and places therefore no increased thermal stress on the plastic of the intake pipe.

Besonders vorteilhaft ist es, wenn im Bereich der Durchführung des Verbindungsrohres eine Aussparung im Ansaugrohr ist, zur Bildung eines radialen Abstandes zum Verbindungsrohr und damit zur Verhinderung einer eventuellen thermischen Belastung des Ansaugrohres in diesem Bereich.It is particularly advantageous if in the area of implementation of the connecting pipe a recess in the intake pipe is to form a radial distance from the connecting pipe and thus to prevent a possible thermal load on the intake pipe in this area.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor.These and other features of preferred further developments The invention also go beyond the claims the description and the drawings.

Zeichnungdrawing

Ausführungsbeispiele einer erfindungsgemäßen Anordnung zur Kühlung von rückgeführtem Abgas bei einem Verbrennungsmotor werden anhand der Figuren 6 und 7 erläutert. Es zeigen:

  • Figur 1 eine Prinzipansicht eines Zylinderkopfes des Verbrennungsmotors mit einen kühlmittelgekühlten Anschluss des rückgeführten Abgases an das Ansaugrohr;
  • Figur 2 einen Schnitt durch den Anschlussflansch für das rückgeführte Abgas mit einem Kühlkanal;
  • Figur 3 eine Prinzipansicht eines Verteilerrohrs für das rückgeführte Abgas mit einem massiven Anschluss an den Zylinderkopf;
  • Figur 4 einen Schnitt durch die Anordnung nach der Figur 3;
  • Figur 5 eine Detailzeichnung einer abgewandelten Ausführung der Anordnung nach den Figuren 3 und 4;
  • Figur 6 einen Schnitt durch ein Ausführungsbeispiel mit einem wärmekontaktierten Insert und
  • Figur 7 eine Detailzeichnung einer abgewandelten Ausführung der Anordnung nach der Figur 6.
    • Exemplary embodiments of an arrangement according to the invention for cooling recirculated exhaust gas in an internal combustion engine are explained with reference to FIGS. 6 and 7. Show it:
  • Figure 1 is a schematic view of a cylinder head of the internal combustion engine with a coolant-cooled connection of the recirculated exhaust gas to the intake pipe;
  • Figure 2 shows a section through the connecting flange for the recirculated exhaust gas with a cooling channel;
  • Figure 3 is a schematic view of a manifold for the recirculated exhaust gas with a massive connection to the cylinder head;
  • Figure 4 shows a section through the arrangement of Figure 3;
  • FIG. 5 shows a detailed drawing of a modified embodiment of the arrangement according to FIGS. 3 and 4;
  • Figure 6 shows a section through an embodiment with a heat-contacted insert and
  • FIG. 7 shows a detailed drawing of a modified embodiment of the arrangement according to FIG. 6.

    • Beschreibung der AusführungsbeispieleDescription of the embodiments

    In Figur 1 ist ein Zylinderkopf 1 eines Verbrennungsmotors mit den hier wesentlichen Teilen gezeigt. An einem Ansaugrohr 2, durch das die Luft zu den Brennkammern des Verbrennungsmotors gelangt ist ein Anschluss 3 für eine Verbindungsleitung 4 vorhanden, über die von. der Abgasleitung abgezweigtes Abgas in das Ansaugrohr 2 zurückgeführt wird. Das Abgas in der Verbindungsleitung 4 hat eine durch die Verbrennung im Motor entsprechend hohe Temperatur, die das Ansaugrohr und die benachbarten Aggregate ev. beschädigen können, da diese für normale Lufttemperaturen ausgelegt sind und größtenteils aus Kunststoff hergestellt sind. In Figure 1 is a cylinder head 1 of an internal combustion engine with the essential parts shown here. On one Intake pipe 2 through which the air to the combustion chambers of the Combustion engine has reached a connection 3 for a Connection line 4 available, via the. the exhaust pipe branched exhaust gas is returned to the intake pipe 2 becomes. The exhaust gas in the connecting line 4 has one due to the combustion in the engine correspondingly high temperature, which the intake pipe and the neighboring aggregates possibly damage, as these are for normal air temperatures are designed and mostly made of plastic are made.

    Am Anschlussflansch 2 für das rückgeführte Abgas ist ein Kühlkanal 5 angeschlossen, durch den das für den Motor ohnehin notwendige Kühlmittel gemäß der Pfeile 6a (Zulauf) und 6b(Ablauf) fließt. In Figur. 2 ist die Führung dieses Kühlkanals 5 um den Anschlussflansch 2 und somit um das Verbindungsrohr 4 für das rückgeführte Abgas in einer anderen Ansicht gezeigt. Die Flanschkontur nach der Figur 2 ist mit zwei Schrauben 7 an dem Kunststoffansaugrohr 2 befestigt. In der Mitte dieser Flanschkontur ist das Verbindungsrohr 4 eingeführt.At the connection flange 2 for the recirculated exhaust gas is a Cooling channel 5 connected through which for the engine coolant required anyway according to arrows 6a (inlet) and 6b (drain) flows. In figure. 2 is the lead this cooling channel 5 around the connecting flange 2 and thus around the connecting pipe 4 for the recirculated exhaust gas in shown another view. The flange contour after the Figure 2 is with two screws 7 on the plastic intake pipe 2 attached. In the middle of this flange contour is the connecting pipe 4 inserted.

    Aus Figur 3 ist ein Ausführungsbeispiel zu entnehmen, bei dem ein Verteilerrohr 10 für rückgeführtes Abgas auf einem Zylinderblock 11 angeordnet ist. Aus Figur 4 ist diese Anordnung im Schnitt zu erkennen. Das rückgeführte Abgas strömt durch den Querschnitt 12 des Verteilerrohrs 10 und wird jeweils über Rohre 13 und entsprechende Anschlussflansche 14 in ein Ansaugrohr 15 geleitet. Für die Befestigung des Verteilerrohres 10 am Zylinderkopf 11 können hier vorzugsweise bereits vorhandene Verschraubungen 16, ev. über eine Metallhülse 17, für das Ansaugrohr 15 mitbenutzt werden.An exemplary embodiment can be seen in FIG which a manifold 10 for recirculated exhaust gas on a Cylinder block 11 is arranged. This is from Figure 4 Recognize the arrangement in section. The recirculated exhaust gas flows through the cross section 12 of the distributor pipe 10 and is in each case via tubes 13 and corresponding connection flanges 14 passed into an intake pipe 15. For the Fastening the distributor pipe 10 to the cylinder head 11 can preferably already existing screw connections here 16, possibly via a metal sleeve 17, for the intake pipe 15 can be used.

    Im Zylinderblock 11 ist in der Figur 4 ein Kühlkanal 18 angeordnet, durch den die Kühlflüssigkeit fließt. Bei einem Ausführungsbeispiel nach Figur 5 kann ein Kühlkanal 19 auch zumindest teilweise in das Verteilerrohr 10 integriert werden, wobei hier noch zusätzliche Dichtungen 20 notwendig sind. In the cylinder block 11 there is a cooling channel 18 in FIG. 4 arranged through which the coolant flows. At a Embodiment according to Figure 5 can a cooling channel 19 also at least partially integrated into the distributor pipe 10 be, with additional seals here 20 are necessary.

    In Figur 6 ist ein Ausführungsbeispiel gezeigt, das ein metallisches Insert 21 aufweist, welches im Kunststoffansaugrohr 22 derart angebracht ist, dass ein stirnseitiges Ende 23 unter Wärmekontakt am Zylinderkopf 24 anliegt. Im Zylinderkopf 24 ist auch ein Kühlkanal 25 angeordnet. In das Insert 21 ist seitlich ein Verbindungsrohr 26 für das rückgeführte Abgas fest und gasdicht eingeführt. Zum umgebenden Kunststoff des Ansaugrohres 22 ist hier ein freier Abstand 27 angebracht, da die relativ hohen Temperaturen des Verbindungsrohres 26 den Kunststoff des Ansaugrohres 22 nicht beschädigen sollen.In Figure 6, an embodiment is shown, the one has metallic insert 21, which in the plastic intake pipe 22 is attached such that an end End 23 is in thermal contact with the cylinder head 24. in the A cooling channel 25 is also arranged in the cylinder head 24. In the insert 21 is a connecting tube 26 for the side recirculated exhaust gas introduced firmly and gas-tight. To the surrounding Plastic of the intake pipe 22 is here free distance 27 attached because of the relatively high temperatures of the connecting pipe 26, the plastic of the intake pipe 22 should not damage.

    Das rückgeführte Abgas strömt gemäß der Pfeile 28 in das relativ kühle Insert 21 und prallt dort ab, so dass die thermische Belastung des Kunststoffs des Ansaugrohres nicht hoch wird. Um die Kühlung des Inserts 21 noch zu verbessern ist gemäß Figur 7 die Fläche des stirnseitigen Endes 23 des Inserts vergrößert, so dass ein noch besserer Wärmekontakt zwischen dem Insert 21 und dem Zylinderkopf 24 erreicht wird.The recirculated exhaust gas flows into the arrow 28 relatively cool insert 21 and bounces off there, so that the thermal load on the plastic of the intake pipe doesn't get high. To cool the insert 21 still too is to improve according to Figure 7 the surface of the front End 23 of the insert enlarged so that an even better one Thermal contact between the insert 21 and the cylinder head 24 is reached.

    Claims (5)

    1. Arrangement for reconducting exhaust gas of an internal combustion engine, whereby:
      a connection tube ( 4; 10, 13; 26) for the reconducted exhaust gas is connected to a plastic intake tube (2; 15; 22) with cooling elements placed therebetween, whereby the cooling element is a massive heat conducting part (10; 21) which is at least partially a component of the conduction tube (10; 26) and is mounted in the area of the flangelike connection of the intake tube on the cylinder head (11; 24) and whereby a cooling liquid is flowing through the cooling channel (18; 19) extending in the area of the attachment of the massive part (10) in the cylinder head (11) or at least partially in the massive part (10); whereby the massive heat conducting part is a tubular insert (21) in the intake tube (22), the insert abutting with a front side (23) under heat contact to the cylinder head (24) and whereby a tubular connection tube (24) is conducted laterally to the insert (21) through the wall of the intake tube (22).
    2. Arrangement according to claim 1, characterised in that:
      the attachment elements of the intake tube (15) on the cylinder head (11) are used at least as attachment elements (16) of the massive part.
    3. Arrangement according to claim 1 or 2, characterised in that:
      the distribution tube for the distribution of the reconducted exhaust gas on several cylinders is arranged in the massive part (10) .
    4. Arrangement according to claim 1, characterised in that:
      a free clearance (27) is in the intake tube (22) in the area of the passage of the connection tube for constituting a radial distance to the connection tube (26).
    5. Arrangement according to claim 1 or 4, characterised in that:
      the front side (23) of the insert (21) abutting to the cylinder head (24) comprises an enlarged surface due to an extended diameter.
    EP98951390A 1997-09-16 1998-09-12 System for recirculating exhaust gas in an internal combustion engine Expired - Lifetime EP1015750B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19740584 1997-09-16
    DE19740584 1997-09-16
    PCT/EP1998/005820 WO1999014477A1 (en) 1997-09-16 1998-09-12 System for recirculating exhaust gas in an internal combustion engine

    Publications (2)

    Publication Number Publication Date
    EP1015750A1 EP1015750A1 (en) 2000-07-05
    EP1015750B1 true EP1015750B1 (en) 2003-05-02

    Family

    ID=7842442

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98951390A Expired - Lifetime EP1015750B1 (en) 1997-09-16 1998-09-12 System for recirculating exhaust gas in an internal combustion engine

    Country Status (9)

    Country Link
    US (1) US6334437B1 (en)
    EP (1) EP1015750B1 (en)
    JP (1) JP2001516841A (en)
    KR (1) KR20010015580A (en)
    AT (1) ATE239171T1 (en)
    BR (1) BR9812326A (en)
    CA (1) CA2304023A1 (en)
    DE (1) DE59808190D1 (en)
    WO (1) WO1999014477A1 (en)

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    JP2005337117A (en) * 2004-05-27 2005-12-08 Nissan Motor Co Ltd Intake device for engine
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    FR3044048B1 (en) * 2015-11-20 2020-01-17 Renault S.A.S. IMPROVED AIR DISTRIBUTOR OF A VEHICLE
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    JP6656006B2 (en) * 2016-02-08 2020-03-04 愛三工業株式会社 Gas distribution device
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    Also Published As

    Publication number Publication date
    KR20010015580A (en) 2001-02-26
    DE59808190D1 (en) 2003-06-05
    EP1015750A1 (en) 2000-07-05
    JP2001516841A (en) 2001-10-02
    BR9812326A (en) 2001-12-18
    US6334437B1 (en) 2002-01-01
    CA2304023A1 (en) 1999-03-25
    WO1999014477A1 (en) 1999-03-25
    ATE239171T1 (en) 2003-05-15

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