EP1780386B1 - Eingangsflansch eines gebogenen Rohres eines Abgaskrümmers und Brennkraftmaschine mit einem solchen Flansch - Google Patents

Eingangsflansch eines gebogenen Rohres eines Abgaskrümmers und Brennkraftmaschine mit einem solchen Flansch Download PDF

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Publication number
EP1780386B1
EP1780386B1 EP06301061A EP06301061A EP1780386B1 EP 1780386 B1 EP1780386 B1 EP 1780386B1 EP 06301061 A EP06301061 A EP 06301061A EP 06301061 A EP06301061 A EP 06301061A EP 1780386 B1 EP1780386 B1 EP 1780386B1
Authority
EP
European Patent Office
Prior art keywords
flange
exhaust manifold
inlet flange
inlet
height
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.)
Not-in-force
Application number
EP06301061A
Other languages
English (en)
French (fr)
Other versions
EP1780386A1 (de
Inventor
Hanan Kharkhour
Guillaume Morin
Jean-Marc Cardona
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.)
Renault SAS
Original Assignee
Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1780386A1 publication Critical patent/EP1780386A1/de
Application granted granted Critical
Publication of EP1780386B1 publication Critical patent/EP1780386B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs

Definitions

  • the present invention generally relates to the inlet flanges of exhaust manifold conduits.
  • It relates more particularly to an inlet flange of a bent duct of an exhaust manifold adapted to connect said bent duct to the exhaust face of a cylinder head, this inlet flange having a central orifice intended to receive an end of said angled duct.
  • the invention also relates to an internal combustion engine comprising such a flange.
  • the internal combustion engines are provided with a cylinder head which surrounds the combustion chambers connected to an exhaust manifold outlet.
  • the exhaust manifold is a piece of cast iron or sheet steel to collect the flue gases from combustion.
  • the exhaust manifold comprises several bent ducts which are intended to channel the flow of the burnt gases from the combustion chambers of the engine and to evacuate them in an exhaust line.
  • Each bent ducts are connected to the exhaust face of the engine cylinder head by flanges, called inlet flanges.
  • Each inlet flange generally has flat and parallel bottom and top surfaces. It also has a central orifice for receiving an end of the corresponding duct of the exhaust manifold. On either side of this central opening, there are two openings through which studs pass to fix each inlet flange to the corresponding exhaust face of the cylinder head.
  • a seal is interposed between each inlet flange and the exhaust face of the cylinder head to ensure the sealing of the exhaust gas mounting flowing from the exhaust face of the cylinder head to the exhaust manifold conduits.
  • the burnt gases from combustion in the combustion chambers carry the walls of the bent ducts of the exhaust manifold at a very high temperature level. Conversely, the inlet flange of the exhaust manifold is in contact with the cylinder head which is cooled. High thermal gradients are thus generated resulting in significant thermomechanical stresses within the exhaust manifold ducts.
  • the exhaust manifold then expands and the bent ducts exert a non-uniform force on their corresponding inlet flange. On one part of the flange, are exerted compression forces, and on the other part, tensile forces. Thus, the flange is bent. The contact pressure between the inlet flange and the exhaust face of the cylinder head is then no longer uniform and can lead to gas leakage, particularly in areas of the flange subjected to tensile stresses.
  • the present invention provides a new inlet flange of an angled duct exhaust manifold for reducing exhaust gas leaks between the flange and the corresponding exhaust face of the cylinder head.
  • the solid part of the flange according to the invention provides a high stiffness connection in the traction zones of the flange.
  • the bending of the flange is thus limited.
  • the loss of contact pressure between the inlet flange of the duct and the exhaust face of the cylinder head is reduced.
  • the exhaust gas leaks between the inlet flange and the exhaust face of the cylinder head are reduced.
  • the invention also relates to an internal combustion engine comprising a flange as described above adapted to connect the inlet of a bent duct of an exhaust manifold to the exhaust face of a cylinder head.
  • an exhaust manifold 10 provided with four branches formed by conduits 11 of exhaust gas inlet.
  • Each duct 11 of the exhaust manifold 10 is bent and is connected to the exhaust face of a cylinder head 4 via an inlet flange 20, schematically materialized by a rectangle on the figure 1 .
  • each inlet flange 20 has two housings 25, 26 to be traversed by a stud.
  • a seal is provided between the inlet flange 20 and the corresponding part of the exhaust face of the cylinder head 4.
  • each inlet flange 20 is provided with a base 21 having planar and parallel lower and upper surfaces. The underside of the inlet flange 20 is intended to come into contact with the seal.
  • Each inlet flange 20 of the elbow duct 11 of the exhaust manifold has a central orifice intended to receive the upstream end, in the flow direction of the exhaust gas, of the duct 11 bent.
  • the base 21 of the inlet flange 20 is surmounted around the central orifice of a solid portion 22 which rises on a height which varies in the median plane of said duct 11 bent.
  • the median plane of the duct 11 bent is the plane containing the average line of curvature of this duct 11 bent.
  • the height of the solid part 22 varies, in the median plane of the duct 11 bent, between a maximum height of the inner side of the bend of the duct and a minimum height of the outer side of the bend of the duct (see figure 2 ).
  • the height of the solid portion 22 of the flange 20 decreases regularly between this maximum height and this minimum height.
  • the solid portion 22 is a hollow cylinder whose central opening extends the central orifice and whose upper face is truncated.
  • This solid portion 22 forms an insertion sleeve of the upstream end, in the flow direction of the exhaust gas, of the duct 11 bent.
  • this solid part 22 comes from forming with the flange 20.
  • each flange comprises two reinforcing ribs 23, 24.
  • the two reinforcing ribs 23, 24 are positioned on either side of the housing 25 and each extend from the zone of maximum height of the lateral face of the solid portion 22 to the end edge of the flange 20.
  • each reinforcing rib 23, 24 comes to form with the flange 20.
  • elbow pipes of the exhaust manifold When the engine is running, the elbow pipes of the exhaust manifold are subjected to high thermal stresses.
  • the ducts bends expand under the effect of heat and induce a non-uniform force on the corresponding inlet flange.
  • a compressive force is applied while on the other part of the flange, a tensile force is applied.
  • the zone of maximum compression of the flange 20 corresponds, in the median plane of the duct 11 bent, to the intersection of the external line of curvature 11A of the duct 11 with the solid portion 22 of the flange 20.
  • the zone of maximum traction corresponds, in the median plane of the duct 11 bent, at the intersection of the internal line of curvature 11B of the duct 11 with the solid portion 22 of the flange 20.
  • the solid part 22 therefore has a maximum height in the maximum traction zone of the flange 20 and its height is minimal in the maximum compression zone of the flange 20.
  • the height of the solid portion 22 according to the invention being greater in the areas of the flange 20 subjected to tensile stresses, these traction zones of the flange 20 are stiffened.
  • the low height of the solid portion 22 in the compression zones of the flange 20 limits the mass of the flange 20.
  • the two ribs 23, 24 make it possible to have a more regular evolution of the stress in the zones of high traction of the flange 20.
  • the inlet flanges 20 of the ducts 11 bent of this exhaust manifold 10 may be obtained by casting as well as the ribs 23, 24 of which they are provided.
  • the flange may also be part of a one-piece piece comprising a plurality of flanges of the same type for connecting a plurality of elbow pipes of the exhaust manifold.
  • the collector may itself consist of welded plates or be obtained by foundry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Claims (11)

  1. Abgaskrümmer (10), der ein gebogenes Rohr (11) und einen Einlassflansch (20), der dazu ausgelegt ist, das gebogene Rohr (11) mit der Auslassseite eines Zylinderkopfs (4) zu verbinden, enthält, wobei dieser Einlassflansch (20) eine mittige Öffnung, die dazu vorgesehen ist, ein Ende des gebogenen Rohrs (11) aufzunehmen, und einen massiven Teil (22) um die mittige Öffnung aufweist, dadurch gekennzeichnet, dass der massive Teil (22) eine Höhe hat, die sich in der Medianebene des gebogenen Rohrs (11) verändert.
  2. Abgaskrümmer (10) nach Anspruch 1, dadurch gekennzeichnet, dass der massive Teil (22) ein Zylinder ist, dessen Oberseite schräg abgeschnitten ist.
  3. Abgaskrümmer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die Höhe des massiven Teils (22) zwischen einer maximalen Höhe an der Innenseite der Krümmung des gebogenen Rohrs (11) und einer minimalen Höhe an der Außenseite der Krümmung des gebogenen Rohrs (11) verändert.
  4. Abgaskrümmer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einlassflansch (20) wenigstens eine Verstärkungsrippe (23, 24) aufweist, die sich von einer Zone mit maximaler Höhe der Seitenfläche des massiven Teils (22) bis zum Endrand des Einlassflansches (20) erstreckt.
  5. Abgaskrümmer (10) nach Anspruch 4, dadurch gekennzeichnet, dass die Verstärkungsrippe (23, 24) einteilig mit dem Einlassflansch (20) ausgebildet ist.
  6. Abgaskrümmer (10) nach Anspruch 4, dadurch gekennzeichnet, dass die Verstärkungsrippe (23, 24) an den Einlassflansch (20) angefügt ist.
  7. Abgaskrümmer (10) nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass der Einlassflansch (20) zwei Verstärkungsrippen (23, 24) aufweist.
  8. Abgaskrümmer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der massive Teil (22) einteilig mit dem Einlassflansch (20) ausgebildet ist.
  9. Abgaskrümmer (10) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der massive Teil (22) an den Einlassflansch (20) angefügt ist.
  10. Abgaskrümmer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Einlassflansch (20) einteilig ausgebildet ist und mehrere Einlassflansche desselben Typs für den Anschluss mehrerer Abgaskrümmerleitungen enthält.
  11. Brennkraftmaschine, die einen Abgaskrümmer (10) nach einem der vorhergehenden Ansprüche enthält.
EP06301061A 2005-10-26 2006-10-19 Eingangsflansch eines gebogenen Rohres eines Abgaskrümmers und Brennkraftmaschine mit einem solchen Flansch Not-in-force EP1780386B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0510931A FR2892450B1 (fr) 2005-10-26 2005-10-26 Bride d'entree d'un conduit coude d'un collecteur d'echappement et moteur a combustion interne comprenant une telle bride

Publications (2)

Publication Number Publication Date
EP1780386A1 EP1780386A1 (de) 2007-05-02
EP1780386B1 true EP1780386B1 (de) 2008-08-13

Family

ID=36216954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06301061A Not-in-force EP1780386B1 (de) 2005-10-26 2006-10-19 Eingangsflansch eines gebogenen Rohres eines Abgaskrümmers und Brennkraftmaschine mit einem solchen Flansch

Country Status (4)

Country Link
EP (1) EP1780386B1 (de)
AT (1) ATE404782T1 (de)
DE (1) DE602006002220D1 (de)
FR (1) FR2892450B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606272B (zh) * 2012-03-30 2014-03-05 长城汽车股份有限公司 一种发动机排气歧管与缸盖联接斜面压紧系统
WO2015048374A1 (en) * 2013-09-27 2015-04-02 United Technologies Corporation Fuel/oil manifold
CN109382159B (zh) * 2018-12-18 2024-03-12 广西华银铝业有限公司 一种新型的圆锥破碎机臂架帽

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313091A1 (de) * 1993-04-22 1994-10-27 Bischoff Erhardt Gmbh Co Kg Flansch zur Befestigung von Rohren
DE10034365B4 (de) * 2000-06-14 2011-02-03 Emcon Technologies Germany (Augsburg) Gmbh Rohrleitung
DE102004010815A1 (de) * 2004-03-05 2005-09-29 Benteler Automobiltechnik Gmbh Anordnung zur Fixierung eines Abgaskrümmers auf dem Zylinderkopf einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE602006002220D1 (de) 2008-09-25
FR2892450B1 (fr) 2007-12-28
ATE404782T1 (de) 2008-08-15
EP1780386A1 (de) 2007-05-02
FR2892450A1 (fr) 2007-04-27

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