EP0816666A2 - Dispositif de recirculation de gaz d'échappement - Google Patents

Dispositif de recirculation de gaz d'échappement Download PDF

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Publication number
EP0816666A2
EP0816666A2 EP97110903A EP97110903A EP0816666A2 EP 0816666 A2 EP0816666 A2 EP 0816666A2 EP 97110903 A EP97110903 A EP 97110903A EP 97110903 A EP97110903 A EP 97110903A EP 0816666 A2 EP0816666 A2 EP 0816666A2
Authority
EP
European Patent Office
Prior art keywords
intake manifold
molded part
exhaust pipe
wall
outer circumference
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.)
Withdrawn
Application number
EP97110903A
Other languages
German (de)
English (en)
Other versions
EP0816666A3 (fr
Inventor
Henryk Stanienda
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.)
ElringKlinger AG
Original Assignee
ElringKlinger AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ElringKlinger AG filed Critical ElringKlinger AG
Publication of EP0816666A2 publication Critical patent/EP0816666A2/fr
Publication of EP0816666A3 publication Critical patent/EP0816666A3/fr
Withdrawn legal-status Critical Current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
    • F02M35/10091—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
    • 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
    • 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
    • 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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/0011—Breather valves
    • F01M2013/0027—Breather valves with a de-icing or defrosting system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0455—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a de-icing or defrosting system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0472—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil using heating means

Definitions

  • the invention relates to a device for controlled feedback of exhaust gases to the intake manifold of an internal combustion engine, with one in an opening of the intake manifold wall usable, metallic exhaust pipe for exhaust gas routing between an EGR valve (Exhaust Gas Recirculation Valve) and the intake manifold, which is in its opposite the intake manifold wall area to be sealed by a thermal barrier coating is included.
  • EGR valve Exhaust Gas Recirculation Valve
  • Exhaust gas recirculation takes place at the current state of the art only during certain engine operating conditions, i.e. H. the EGR valve is often closed.
  • the EGR valve is often closed.
  • Exhaust gas can be returned to the engine intake side, even if the amount of exhaust gas returned is regulated depending on the load.
  • the intake manifold was a light metal casting; for cost reasons and to save weight are used as intake manifolds in modern engines however, injection molded plastic parts used.
  • a metallic exhaust pipe leads from the EGR valve to the intake manifold and protrudes into an opening of the intake manifold wall into it, this opening being larger than the outside diameter of the exhaust pipe, so that the latter the intake manifold wall not touched. Because the recirculated exhaust gases in the area temperatures of the exhaust pipe leading away from the EGR valve from 350 to 400 ° C, compared to which the plastic of Intake manifold is not stable, takes place at the state of the Technique to fix the exhaust pipe leading away from the EGR valve in the intake manifold and its seal against the Intake manifold as follows: is on the metallic exhaust pipe a metallic sleeve is welded to the tube at a distance surrounds, so that between the latter and the sleeve annular air gap, which gives the thermal insulation serves; so that the metallic sleeve is welded to the exhaust pipe it has on the EGR valve End a cone-shaped area with its small Diameter bears against the outer circumference of the exhaust pipe and is welded there while the intake manifold
  • the intake manifold now has one said opening in the short, surrounding the intake manifold wall Pipe socket-shaped approach in which the metallic sleeve is inserted together with the exhaust pipe and against its inner wall the outer circumference of the sleeve by means of an O-ring is sealed.
  • a similar exhaust gas recirculation device results from the EP-A-0 647 779; in this device is on the exhaust gas recirculation serving metallic exhaust pipe also a attached approximately conical metal sleeve, namely e.g. B. by soldering, the attachment point not the EGR valve, but facing the plastic intake manifold is.
  • the seal is not made using a O-ring, but by means of a flexible plastic sleeve, which on the one hand on the intake manifold and on the other hand with her, facing away from the latter, the metallic one End region comprising sleeve is fixed to this sleeve, namely on the sleeve area with the largest diameter by means of a clamping ring.
  • the invention was therefore based on the object of an exhaust gas recirculation device of the kind mentioned at the beginning, which is then combined with a plastic intake manifold when the EGR valve is in constant operation, and which enables long service life and low manufacturing costs.
  • the basic idea of the present invention is that at least that area of the metallic exhaust pipe which adjacent after installing the intake manifold wall is a shielding thermal insulation layer made of an easy to process high temperature resistant and good thermal insulation properties having to form, curable molding compound, which also as good as possible on the metallic exhaust pipe is liable, whereby, as will become clear from the following, such liability easily by other fastening and Sealing measures can be replaced.
  • a particularly suitable molding compound results from the in Form of the International published WO 95/26938 Patent application PCT / EP95 / 00561 by Elring Klinger GmbH, which is why it is proposed according to the present invention to design a device of the type mentioned in the introduction, that the thermal barrier coating is made from a curable, a high temperature resistant binder, particles of a porous Materials as well as a fibrous or needle-shaped reinforcement component containing molding compound produced, sleeve-shaped molded part is formed, which one hand gas-tight in the area of the opening of the intake manifold wall the latter definable and on the other hand with at least one axial portion of its inner wall surface against the outer circumference abuts the exhaust pipe, so as to the exhaust pipe with respect of the intake manifold and the molded part with respect to the exhaust pipe to position.
  • a molded part produced from such a molding compound is not only particularly temperature-resistant and heat-insulating, but it also has what is necessary for engine operation mechanical fatigue strength, so that even in engine operation constantly occurring vibrations do not cause cracks or permanent breaks to lead.
  • the inner wall surface of the molded part and the outer circumference of the exhaust pipe along one around the latter running line or in three on this Points lying against each other would line up to the Position the molded part on the metallic exhaust pipe or in the If the molded part is fixed on the intake manifold and / or the metallic exhaust pipe on the EGR valve with respect to the intake manifold to be determined. However, if the molding as one over their entire length against the outer circumference of the exhaust pipe adjacent sleeve is formed, the molded part in Form from the molding compound on the metallic exhaust pipe and harden, with the appropriate choice of the in the molding compound contained binder also a permanent connection can be achieved between molded part and exhaust pipe.
  • the gas pipe provided with the molded part gas-tight It is recommended to insert it into the intake manifold for sealing an annular, opposite the intake manifold wall with radial pressure against the outer circumference of the sleeve Seal made of elastic material, which then another thermal insulation element at the transition to the plastic wall of the intake manifold.
  • the molded part to be provided according to the invention but also the air gap thermal insulation realize the known device described at the outset, by designing the molded part so that it is only in its valve-side end area with its inner wall surface bears against the outer circumference of the exhaust pipe and otherwise runs at a radial distance from this outer circumference, so that between the inner wall surface of the molded part and the outer circumference of the exhaust pipe gives an annular space, which with air, exhaust gas or a mixture of these and an additional one Thermal insulation effect.
  • the molding with the exhaust pipe firmly and connect permanently.
  • the molded part with its valve-side end face in the axial direction against one with respect supports the solid end face of the exhaust pipe.
  • the molded part can also be particularly easy in the direction fixed to the intake manifold transversely to the exhaust pipe axis, by pulling the molded part away from the EGR valve End area with a graduated outer diameter, so that it has an axial section of smaller diameter inserted into the opening of the intake manifold wall can be.
  • the molded part is one after a device or more of claims 2 to 16 in the form of International patent application published in WO 95/26938 PCT / EP95 / 00561.
  • FIG. 1 shows an EGR valve 10 in a side view, from which a metallic exhaust pipe serving for exhaust gas recirculation 12 to an intake manifold designated as a whole by 14 leads. Only the area of the latter became a manifold wall 16 shown, in which the latter a Opening 18 for the entry of the exhaust pipe 12 into the interior of the intake manifold 14.
  • a cuff 20 On the end region of the exhaust pipe facing the EGR valve 10 12 is a cuff 20 attached, which a 1 right end face 20a, which is vertical runs to the axis 12a of the exhaust pipe 12 and, as is the following will result, a stop and sealing surface forms. It is preferably the cuff 20 around a part made of a material which is at least approximately the same coefficient of thermal expansion how the metal of the exhaust pipe 12 has; in addition, the Sleeve 20 gas-tight on the outer peripheral surface of the exhaust pipe 12 sit.
  • end face 20a could also have a circumferential one Shoulder, a collar of the metallic exhaust pipe 12 or an end face of the EGR valve 10 is formed.
  • a sleeve-shaped molded part 24 which consists of a molding compound was produced as in the publication WO 95/26938 has been described and claimed.
  • the molding 24 is rotationally symmetrical to the axis 12a according to the invention 1 and has an approximately conical shape on the left axial section, to the right a whole roughly circular cylindrical section connects so that a gas-filled between the exhaust pipe 12 and the molded part 24 Annulus 26 results.
  • the smallest inside diameter of the molded part 24 the same or only very slightly larger than the outside diameter of the exhaust pipe 12 (At least on that surrounded by the left end region of the molded part 24 Body), so that the molded part 24 when pushed on the exhaust pipe 12 is centered on the latter.
  • the molded part 24 a graded one at its right end according to the drawing figures Outside diameter and thus forms a perpendicular to End surface 30 extending along axis 12a and a shoulder 32 with a smaller outside diameter.
  • the latter is now in accordance with the invention the same or slightly smaller than that Diameter of the opening 18 in the manifold wall 16 so that the molded part 24 with the projection 32 also with respect to the opening 18 of the intake manifold 14 can be centered.
  • End face 34 of the molded part 24 is located in each case an annular groove 36 and 38, in each of which a not shown O-ring can be inserted so that the joint between the Intake manifold wall 16 and the molded part 24 or between the Seal cuff 20 and the molded part 24 when the invention Device is mounted on the intake manifold 14 -
  • the molded part 24 is in the axial direction between the Cuff 20 and the intake manifold wall 16 clamped.
  • Fig. 3 were the first embodiment corresponding Parts with the same reference numerals as in Figures 1 and 2 provided, but with the addition of an A.
  • the plastic wall 16A of the intake manifold around its opening 18A a tubular socket Approach 50A through which the metallic exhaust pipe 12A a heat-insulating surrounding the exhaust pipe Form part 24A protrudes.
  • the molded part 24A is firmly connected to the exhaust pipe 12A, what z. B. can be achieved in that the molded part 24A is formed in situ on the exhaust pipe 12A.
  • it may recommend the exhaust pipe 12A on his To provide outer circumference with an annular groove 52A, so that the Molding compound enters this ring groove when the molded part 24A in is formed in situ on the exhaust pipe 12A.
  • the intake manifold wall 16A centered and kept gas-tight is between the neck 50A of the manifold wall 16A and an annular seal on the outer periphery of the molded part 24A 60A made of an elastic and temperature-resistant material arranged, which is annular and an approximately L-shaped Cross section has and is dimensioned so that it with radial Pressing is held on the one hand on the molded part 24A and on the other hand abuts against the inner wall surface of the projection 50A.
  • the exhaust pipe is 12 or 12A in the axial direction Preferably so dimensioned that it protrudes a bit into the interior of the intake manifold, d. H. protrudes over the manifold wall 16 or 16A.

Landscapes

  • 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)
  • Exhaust Silencers (AREA)
EP97110903A 1996-07-05 1997-07-02 Dispositif de recirculation de gaz d'échappement Withdrawn EP0816666A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627035A DE19627035C2 (de) 1996-07-05 1996-07-05 Abgas-Rückführvorrichtung
DE19627035 1996-07-05

Publications (2)

Publication Number Publication Date
EP0816666A2 true EP0816666A2 (fr) 1998-01-07
EP0816666A3 EP0816666A3 (fr) 1998-11-18

Family

ID=7798969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97110903A Withdrawn EP0816666A3 (fr) 1996-07-05 1997-07-02 Dispositif de recirculation de gaz d'échappement

Country Status (2)

Country Link
EP (1) EP0816666A3 (fr)
DE (1) DE19627035C2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324338A (en) * 1996-09-18 1998-10-21 Nissan Motor A plastic intake manifold for an ic engine with a variable diameter opening and spacing collar for receiving an EGR pipe.
WO1999043946A1 (fr) * 1998-02-24 1999-09-02 Mannesmann Vdo Ag Dispositif d'admission pour moteur a combustion interne
US5970960A (en) * 1996-09-18 1999-10-26 Nissan Motor Co., Ltd. Exhaust gas recirculation system of internal combustion engine
WO2001025609A1 (fr) * 1999-10-04 2001-04-12 Siemens Canada Limited Systeme de recirculation des gaz d'echappement
EP1207279A1 (fr) * 2000-11-20 2002-05-22 Yamaha Hatsudoki Kabushiki Kaisha Moteur à combustion et élément de liaison
FR3001262A1 (fr) * 2013-01-23 2014-07-25 Renault Sa "agencement pour le raccordement d'une conduite de recirculation de gaz d'echappement avec un circuit d'admission de moteur a combustion interne"
CN109424476A (zh) * 2017-08-31 2019-03-05 爱三工业株式会社 进气装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014977A1 (de) 2009-03-30 2010-12-16 Mann + Hummel Gmbh Sauganlage in einem Kraftfahrzeug
EP3101244B1 (fr) 2015-06-01 2021-04-07 Mann + Hummel Gmbh Élement d'etancheite, element de filtre annulaire, separateur d'huile et procede d'ouverture d'un carter de filtre d'un separateur d'huile
CN109915444B (zh) 2017-12-12 2022-03-29 斯凯孚公司 包括圆柱形组成部件和金属板元件的结构单元和制造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916466C2 (de) * 1989-05-20 1996-03-14 Audi Ag Vorrichtung zur Abgasrückführung
JP2548036Y2 (ja) * 1991-01-25 1997-09-17 アイシン精機株式会社 排気ガス還流装置
JPH05256217A (ja) * 1992-03-16 1993-10-05 Aisin Seiki Co Ltd 樹脂製インテークマニホールド
FR2710952B1 (fr) * 1993-10-08 1995-11-17 Renault Dispositif de recirculation des gaz d'échappement d'un moteur à combustion interne.
DE4411436A1 (de) * 1994-03-31 1995-10-05 Elring Gmbh Wärmedämmformteile

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324338B (en) * 1996-09-18 1999-05-19 Nissan Motor Exhaust gas recirculation system having a plastic intake passage
US5970960A (en) * 1996-09-18 1999-10-26 Nissan Motor Co., Ltd. Exhaust gas recirculation system of internal combustion engine
US6173701B1 (en) 1996-09-18 2001-01-16 Nissan Motor Co., Ltd. Exhaust gas recirculation system of internal combustion engine
GB2324338A (en) * 1996-09-18 1998-10-21 Nissan Motor A plastic intake manifold for an ic engine with a variable diameter opening and spacing collar for receiving an EGR pipe.
US6443134B1 (en) 1998-02-24 2002-09-03 Mannesmann Vdo Ag Intake device for an internal combustion engine
WO1999043946A1 (fr) * 1998-02-24 1999-09-02 Mannesmann Vdo Ag Dispositif d'admission pour moteur a combustion interne
WO2001025609A1 (fr) * 1999-10-04 2001-04-12 Siemens Canada Limited Systeme de recirculation des gaz d'echappement
EP1207279A1 (fr) * 2000-11-20 2002-05-22 Yamaha Hatsudoki Kabushiki Kaisha Moteur à combustion et élément de liaison
US6601572B2 (en) 2000-11-20 2003-08-05 Yamaha Hatsudoki Kabushiki Kaisha Joint structure for an blow-by gas passage
EP1715149A2 (fr) 2000-11-20 2006-10-25 Yamaha Hatsudoki Kabushiki Kaisha Moteur à combustion
EP1715149A3 (fr) * 2000-11-20 2010-07-21 Yamaha Hatsudoki Kabushiki Kaisha Moteur à combustion
FR3001262A1 (fr) * 2013-01-23 2014-07-25 Renault Sa "agencement pour le raccordement d'une conduite de recirculation de gaz d'echappement avec un circuit d'admission de moteur a combustion interne"
WO2014114865A1 (fr) * 2013-01-23 2014-07-31 Renault S.A.S Agencement pour le raccordement d'une conduite de recirculation de gaz d'echappement avec un circuit d'admission de moteur a combustion interne
CN109424476A (zh) * 2017-08-31 2019-03-05 爱三工业株式会社 进气装置

Also Published As

Publication number Publication date
DE19627035A1 (de) 1998-01-08
EP0816666A3 (fr) 1998-11-18
DE19627035C2 (de) 1998-07-16

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