EP1122421B1 - Saugrohr mit integrierter Abgasrückführung - Google Patents

Saugrohr mit integrierter Abgasrückführung Download PDF

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Publication number
EP1122421B1
EP1122421B1 EP01100348A EP01100348A EP1122421B1 EP 1122421 B1 EP1122421 B1 EP 1122421B1 EP 01100348 A EP01100348 A EP 01100348A EP 01100348 A EP01100348 A EP 01100348A EP 1122421 B1 EP1122421 B1 EP 1122421B1
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EP
European Patent Office
Prior art keywords
exhaust gas
intake
pipe
intake manifold
suction
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
EP01100348A
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German (de)
English (en)
French (fr)
Other versions
EP1122421A3 (de
EP1122421A2 (de
Inventor
Herbert Pietrowski
Achim Rehmann
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
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Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1122421A2 publication Critical patent/EP1122421A2/de
Publication of EP1122421A3 publication Critical patent/EP1122421A3/de
Application granted granted Critical
Publication of EP1122421B1 publication Critical patent/EP1122421B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02M26/17—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
    • F02M26/13—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
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • 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
    • 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
    • F02M35/10026—Plenum chambers
    • F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
    • 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
    • F02M35/10026—Plenum chambers
    • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • 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
    • F02M35/10072—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
    • F02M35/10006—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
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • 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
    • 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
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • 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
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation
    • 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
    • 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
    • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • 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

Definitions

  • the invention relates to a suction pipe with an integrated exhaust gas recirculation, which has a connection for the exhaust gas and supply openings for the various suction channels, according to the preamble of claim 1.
  • Suction tubes of the type described above are known, for example. From the JP 409317579 A or the JP 410131813A , That's how it works WO 97/33081 remove a Saurohr in which the channels for exhaust gas recirculation are formed by grooves in Zylinderkopfflansch, wherein after installation of the intake manifold on the cylinder head the missing wall of the exhaust gas recirculation channels are formed by this.
  • the object of the invention is therefore to provide a suction pipe with an integrated exhaust gas recirculation, in which the outgoing of the exhaust gas recirculation thermal load of the intake manifold is low. This object is solved by the features of claim 1.
  • the intake manifold according to the invention has the known structure with inlet, plenum, from this outgoing suction channels and outlets to the cylinders.
  • the outlets can be meaningfully designed as a cylinder head flange.
  • the suction tube may be provided for a series arrangement, V-arrangement or any other arrangement of the cylinder. It is also possible to provide a plurality of collecting chambers, which are assigned to respective groups of suction channels.
  • the intake manifold has a connection for the exhaust gas recirculation. Via an exhaust pipe, the exhaust gas is guided to supply ports, which are each arranged in the influenced by the suction channels flow region of the intake air.
  • each cylinder separately exhaust gas can be supplied, whereby a desired, in particular uniform distribution of the exhaust gas is ensured on all cylinders.
  • valves can be provided which enable a cylinder-selective exhaust gas introduction depending on the timing of the individual cylinders.
  • the flow region influencing the intake passages is understood to mean the region which largely corresponds to the supplied exhaust gas allows for a suction channel. This not only means the volume of the suction channel itself.
  • the supply openings may also be arranged in the volume of the collecting space and in the vicinity of the suction openings formed by the suction channels, which open into the collecting space.
  • an unambiguous assignment of the exhaust gas to the individual suction channels is essentially possible.
  • a stoichiometric distribution of openings in the exhaust pipe may be arranged in the volume of the collecting space and in the vicinity of the suction openings formed by the suction channels, which open into the collecting space.
  • connections and exhaust gas pipes in the intake manifold.
  • the connections and the exhaust pipe create in the construction of the suction advantageously a creative scope, as when laying the lines in the plenum less boundary conditions by other components such.
  • the injectors, Zyinderkopfhaube, generators, pumps, the fuel rail or screwdriver release must be observed.
  • Another advantage is that the exhaust pipe is flowed around by the intake air in the plenum. In this way, before the introduction of the exhaust gas into the suction pipe, a cooling of the same possible. However, the cooling does not have to be achieved by means of a separate duct system or a cooling medium which is alien to the combustion air. An additional design effort for the cooling is therefore not applicable. Also, the requirements for the tightness of the exhaust passage in the intake manifold are lower, since a low leakage only leads to an earlier admixing of the exhaust gas to the intake air.
  • the maintenance of a distance of the exhaust pipe to the walls of the intake manifold prevents heat conduction of the heating exhaust pipe in the Saugrohrmaterial. As a result, a thermal load on the intake manifold can be greatly reduced.
  • a direct heat conduction is possible only via the holding means which fix the exhaust pipe in the intake manifold inside.
  • a holding means is at least one seal, which is necessary at the edge of a passage for the connection. The connection is thus outside the intake manifold, so that a connection to the exhaust system of the internal combustion engine is possible. Further holding means for the exhaust pipe can be achieved by all available means of connection technology.
  • fittings and rivets can be done in a multi-shell construction of the suction pipe fixation of the exhaust pipe by mounting the intake manifolds. Bars as spacers can minimize the heat conduction at a sufficient fixation. A further minimization is advantageously possible because the holding means themselves allow a low heat conduction. This can be achieved in particular by a small cross section of the holding means, which produce a thermal bridge between Saugrohrwandung and exhaust pipe, in addition to the choice of ceramic as a material with low thermal conductivity, as claimed in claim 1.
  • the invention may serve as holding means and the supply openings of the exhaust pipe, if they must be passed through the walls of the suction channels. This inevitably results in a connection between the exhaust pipe and the walls of the intake manifold, in particular of the suction channel, by means of which the exhaust pipe can be fixed.
  • Such an arrangement of the feed opening, which leads to a defined introduction of the exhaust gas into the intake air in the suction channels, can be improved by an advantageous embodiment of the connection point in the passages of the wall.
  • connection point in the passages of the wall can be z. B. use a bellows pipe section, which leads to a by the enlargement of the surface on the bellows or an extension of the Wämemtechnischsumble to a thermal insulation of the exhaust pipe to the intake manifold.
  • the bellows-like pipe section itself is suitable for the passage or introduction of the exhaust gas into the suction channel.
  • the bellows allows by its elasticity a certain tolerance compensation between exhaust pipe and intake manifold.
  • the feed openings are arranged in the region of the suction openings of the suction channels, the heat transfer can be further reduced.
  • a central introduction based on the cross section of the intake ports is possible, whereby a uniform distribution of the exhaust gas can be carried out in the intake air.
  • large tolerances can be realized.
  • the shells can z. B. consist of two deep-drawn metal parts, can be realized with the help of complicated geometric structures of the exhaust pipe.
  • further functional components can be integrated in the shells.
  • flanges or spacers for fixing the exhaust pipe in the intake manifold inside can be produced inexpensively.
  • the channel structure formed by the shells can be supplemented by other components that can be mounted to the base. So it is z. B. possible to complete the connection of pipes exhaust pipe.
  • the production of the exhaust pipe made of a metallic material ensures good heat conduction from the exhaust gas to the intake air in the intake manifold. As a result, an optimal cooling of the exhaust gas can be achieved up to the discharge points, whereby the walls of the suction pipe in the region of the discharge points are less thermally stressed.
  • metallic materials have a high temperature resistance, so that high return rates of exhaust gas can be realized in the intake manifold.
  • At low thermal load can also be a heat-resistant plastic, eg. As PPS used. In this case, favorable manufacturing and material costs can be achieved.
  • the suction pipe itself is advantageously made of plastic. As a result, an economical production is possible. Especially in multi-shell technology, the exhaust pipe before the final assembly of the intake manifold can be easily integrated into this. However, integration is also conceivable for plastic suction pipes, which are manufactured in melt core technology. In this case, either an installation opening for the exhaust pipe would have to be provided or the exhaust pipe to be poured into the melting core, thereby defining their position in the intake manifold inside. Of course, the invention can also in suction pipes made of metal, for. As aluminum, apply.
  • the geometry of the exhaust pipe in the intake manifold can be designed such that the distance traveled by the exhaust gas path from the respective port to the respective supply port to the suction channels is always the same length.
  • the dead times are synchronized, which arise between the opening of the exhaust gas recirculation valve and the introduction of the exhaust gas into the suction channels.
  • an equally strong cooling of the exhaust gas is achieved up to the individual discharge points in this way.
  • the homogenization of these effects leads to an optimal emission reduction by exhaust gas recirculation.
  • a possible reduction of the engine torque is counteracted, which could be caused by a short circuit caused by the exhaust gas recirculation lines.
  • the length of the lines counteracts the throttle.
  • FIG. 1 provides an insight into a lower shell 10 of an intake manifold. It can be seen how the intake air en Jardinend the arrows from an inlet 11 via two plenums 12 to suction 13 of suction channels 14 passes, leading to not shown outlets of a Zylinderkopfflansches 15.
  • an exhaust pipe 17 a, b, in FIG. 1 is shown in two variants, to supply ports 18a, b, which allows the introduction of the exhaust gas in the region of the suction channels.
  • the exhaust pipe 17a is attached by means of a snap connection 19 to walls 20 of the suction pipe.
  • the exhaust pipe 17b is fastened by means of screws 21 via tabs 22 in the intake manifold.
  • the structure of the exhaust pipe 17b may continue the FIG. 2 be removed. This is composed of two shells 23, whereby the cavity for the passage of the exhaust gases is formed.
  • the tab 22 for securing the exhaust pipe is also an integral part of one of the shells.
  • the feed opening 18b is inserted into a passage 24b in the wall 20b of the corresponding suction channel 14. At this point, an addition to the intake air, which flows to one of the outlets 25 in the cylinder head flange 15.
  • the suction tube is manufactured in multi-shell technology and welded.
  • the suction channels 14 are welded into the lower shell 10.
  • a resonance flap 26 must be installed as a connection between the two collecting chambers 12 and the exhaust pipe 17b in the lower shell.
  • an upper shell 27 is welded to the lower shell 10.
  • connection 16 is shown as a detail in section.
  • the connection consists of a pipe socket 28 which is fixed by means of a mounting flange 29 in a bushing 24.
  • a seal 30 in the form of an O-ring is housed in the bushing.
  • the tube opens on one side into a screw socket 31, which allows the attachment of an exhaust gas supply line 32 and on the other side in the exhaust pipe 17a, b (both versions are shown).
  • the pipe socket in the region of the bushing 24 is designed as a bell-shaped hollow profile 33.
  • the feed openings 18b in the passages 24b may be configured such that the heat conduction from the exhaust pipe to the wall 20b of the suction channels 14 is prevented.
  • the supply is designed as a pipe section 34 which contains a metal bellows 35.
  • the exhaust pipe 17b is attached.
  • the pipe piece in turn is inserted into the passage 24b.
  • a molding 36 made of ceramic will be used. This is free in its design.
  • a nozzle 37 is formed, which leads to a targeted introduction of the exhaust gas.
  • This nozzle is aligned according to the curvature of the suction channel 14 in the flow direction of the intake air.
  • the exhaust gas is entrained immediately after the introduction and optimally distributed in the intake air.
  • FIG. 6 shows another example of a suction pipe, wherein a part of the collecting space 12 is cut open, so that 2 variants of an exhaust pipe 17c and 17d are visible. This is fixed by the connection 16 and the snap connection 19.
  • the feed openings 18c of the one variants open into the suction openings 13 of the suction channels 14 in the manner described.
  • the feed openings 18d are distributed stoichiometrically or regularly on the surface of the exhaust pipe 17d and thus lead to a uniform mixing of the intake air with recirculated exhaust gas, before this the suction channels 14th reached.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP01100348A 2000-02-02 2001-01-05 Saugrohr mit integrierter Abgasrückführung Expired - Lifetime EP1122421B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10004552A DE10004552A1 (de) 2000-02-02 2000-02-02 Saugrohr mit integrierter Abgasrückführung
DE10004552 2000-02-02

Publications (3)

Publication Number Publication Date
EP1122421A2 EP1122421A2 (de) 2001-08-08
EP1122421A3 EP1122421A3 (de) 2002-06-12
EP1122421B1 true EP1122421B1 (de) 2009-08-19

Family

ID=7629583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100348A Expired - Lifetime EP1122421B1 (de) 2000-02-02 2001-01-05 Saugrohr mit integrierter Abgasrückführung

Country Status (5)

Country Link
US (1) US6422221B2 (ja)
EP (1) EP1122421B1 (ja)
JP (1) JP2001241367A (ja)
AT (1) ATE440214T1 (ja)
DE (2) DE10004552A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103443439A (zh) * 2010-11-08 2013-12-11 法雷奥热系统公司 气体分配歧管和相应的进气模块

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045636B4 (de) * 2000-09-15 2012-04-12 Audi Ag Vorrichtung zum Führen eines sekundären Gases
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US6886532B2 (en) * 2001-03-13 2005-05-03 Nissan Motor Co., Ltd. Intake system of internal combustion engine
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US20010025632A1 (en) 2001-10-04
DE10004552A1 (de) 2001-08-09
DE50115043D1 (de) 2009-10-01
JP2001241367A (ja) 2001-09-07
US6422221B2 (en) 2002-07-23
EP1122421A2 (de) 2001-08-08
ATE440214T1 (de) 2009-09-15

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