EP0527683B1 - Induction system for internal combustion engines - Google Patents

Induction system for internal combustion engines Download PDF

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Publication number
EP0527683B1
EP0527683B1 EP19920402271 EP92402271A EP0527683B1 EP 0527683 B1 EP0527683 B1 EP 0527683B1 EP 19920402271 EP19920402271 EP 19920402271 EP 92402271 A EP92402271 A EP 92402271A EP 0527683 B1 EP0527683 B1 EP 0527683B1
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EP
European Patent Office
Prior art keywords
fixed
duct elements
induction circuit
engine
assembly
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
EP19920402271
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German (de)
French (fr)
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EP0527683A1 (en
Inventor
Robert Pillon
Pierre-Alain Weite
Laurent Polac
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
Regie Nationale des Usines Renault
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Renault SAS
Regie Nationale des Usines Renault
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Publication of EP0527683A1 publication Critical patent/EP0527683A1/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
    • F02M35/10091—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
    • F02M35/10091—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
    • F02M35/10124—Ducts with special cross-sections, e.g. non-circular cross-section
    • 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
    • F02M35/10137—Flexible ducts, e.g. bellows or hoses
    • 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
    • F02M35/10301—Flexible, resilient, pivotally or movable parts; Membranes
    • 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 present invention relates to an air intake or gas mixture circuit for internal combustion engines, in particular for motor vehicles.
  • an internal combustion engine comprises several combustion chambers each provided with at least one inlet orifice periodically closed by a valve.
  • the combustion air intake circuit supplying the combustion chambers mainly comprises a conduit connecting an inlet mouth to an intake manifold which comprises a distributor or plenum and several arms which respectively conduct part of the gas mass towards said orifice of each of the combustion chambers.
  • the dimensions of the collector, length of the conduits and volume of the plenum, are directly related to the performance of the engine. This results in a part of large size and / or mass, placed in overhang and rigidly connected to the cylinder head for sealing reasons.
  • the intake circuit Due to its function and its location, the intake circuit is the seat of important vibrations. In fact, the excitations of the engine block, combustion noises or distribution shocks, have a direct impact on the intake circuit. Furthermore the circuit is subjected to pulsations of air flow to the valves which propagate along the intake manifold at the speed of sound, to reach the air intake and thus create "mouth noise”. Finally inside the intake circuit, the air stream is the seat of pressure pulsations which vibrate at their frequencies the walls of the ducts.
  • a first solution consists in reinforcing the rigidity of the intake circuit and of the manifold in particular, by ribbing or bending, so as to push the resonant frequencies beyond the operating range of the engine. If it is then possible to get rid of low frequency modes, it is however not possible to have an intake circuit of sufficient rigidity to avoid high frequency vibrations, generating audible noise.
  • a second solution consists in inserting a flexible connection in the intake circuit so as to effect decoupling.
  • the publication Fr 2.315.012 describes in particular a device for flexible mounting of the intake manifold on an internal combustion engine, characterized in that the manifold is sandwiched between at least two thicknesses of elastomer, one between the manifold and the cylinder head, the other between the manifold and each fixing screw, so as to avoid any direct metallic contact between the intake manifold and the cylinder head.
  • Another possibility of decoupling consists in dividing the collector into two parts at the level of the conduits, the first part is rigidly fixed on the cylinder head and the connection with the second part is made for each conduit thanks to a cylindrical sleeve made of deformable material. The decoupling generated by this device turns out to be more or less good depending on the direction of the stresses, the stiffness of the sleeves being very different in shear, bending or even traction.
  • the object of the present invention is to produce an intake circuit which avoids the aforementioned drawbacks, and provides the engine with quieter operation.
  • the intake circuit for an internal combustion engine comprises a manifold formed by a distributor and a plurality of arms each intended to supply one of the engine cylinders, each arm being formed by two elements of ducts respectively fixed to the plenum and to the cylinder head of the engine.
  • the intake circuit is characterized in that the opposite ends of the duct elements of each of the arms are integral with lateral assembly flanges and in that a flexible seal is interposed between said flanges, said seal acting as a filter to prevent the propagation of vibrations from the engine to the manifold.
  • said flexible seal is formed of a body, made of flexible materials capable of damping vibrations such as elastomer, said body having a passage in accordance with the orifices of the duct elements including it ensures the junction.
  • said body is provided with fixing screws projecting from each of the bearing faces, each of these screws being able to be inserted in a bore carried by the opposite assembly flange.
  • said body comprising, in the vicinity of its bearing faces, metal reinforcements.
  • said screws are fixed to said reinforcements.
  • said reinforcements have at the level of the screws bosses which are flush with the bearing faces of said body.
  • said body has at the outlet of the passage) extra thicknesses or lips intended to ensure sealing when the said body is clamped between the flanges.
  • the section of said passages evolves along the thickness of said body.
  • a single seal is interposed between the duct elements of the set of arms, said seal then being formed by a single-piece body having as many passages as there are arms.
  • all of the various duct elements fixed to the plenum are integral with the same lateral assembly flange.
  • all of the various duct elements fixed to the cylinder head of the engine are integral with the same lateral assembly flange.
  • FIG. 1 the intake circuit of an internal combustion engine 1, consisting of a four-cylinder engine, diesel or spark ignition.
  • Each of the four combustion chambers has an inlet adapted to be closed by a valve.
  • the intake circuit connects an air inlet mouth, not shown, to the intake orifice of each of the chambers, and is made up for this purpose in particular of a manifold comprising a distributor or plenum 2 extended by four separate arms. 3 each supplying one of the cylinders.
  • Each arm 3 is formed by two conduit elements 3a and 3b respectively fixed to the plenum 2 and to the cylinder head of the engine block 1.
  • the opposite ends of the conduit elements 3a and 3b are assembled with the interposition of a flexible joint 4 acting as a filter to prevent the propagation of vibrations from the motor to the collector.
  • the opposite ends of the conduit elements 3a and 3b are integral with lateral flat assembly flanges 31a and 31b respectively. Between the two substantially rectangular flat flanges 31a and 31b is interposed the flexible seal 4.
  • the flexible seal mainly consists of a one-piece plate or body 41 of shape substantially identical to the flat flanges 31a and 31b.
  • the body 41 has four passages 42 aligned along the longitudinal axis, these passages 42 being arranged in accordance with the orifices 32a and 32b of the duct elements 3a and 3b forming the arms 3 of the manifold.
  • the body 41 is provided with fixing screws 45 projecting from the two bearing faces 4a and 4b.
  • the assembly flanges 31a and 31b have holes, respectively 35a and 35b, for the passage of the screws 45. The clamping of the flanges is then carried out by means of the nuts 25.
  • Figure 3 specifies the embodiment of the seal 4.
  • the body 41 is made of molded elastomer, or bonded, on two separate plates of stamped sheet steel, 43a and 43b, each extending in the vicinity of a side face support, respectively 4a and 4b.
  • the plates 43a, 43b also ensure the anchoring of the fixing screws 45, to do this each screw is inserted into a calibrated orifice carried by the receiving plate, the threaded end projecting outwards, until the screw heads be in contact with the plates, the screw heads are then welded to the latter.
  • the air passages 42 formed through the body 41, have an inlet and outlet section perfectly suited to the upstream 3a and downstream 3b conduits, of which they provide the junction.
  • the rectangular section shown can thus also be circular or elliptical, it is also possible to vary the section in the very thickness of the plate 41, for example to form a convergent.
  • the body 41 has, at the outlet of each orifice 42, an additional thickness or lip 44 intended to ensure sealing during tightening. These sealing lips 44 make it possible to reduce the requirements of flatness and surface condition of the flat flanges 31a and 31b integral with the duct elements.
  • the presence of the reinforcements 43 inside the plate 41 reinforces the rigidity and the flatness of the bearing surfaces, which makes it possible to use only a limited number of fixing screws.
  • the plates have bosses 47, obtained by stamping, which are flush with the bearing faces. The function of these bosses 47 is to control the tightening torque and to prevent any risk of loosening by creep of the elastomer; moreover thanks to these bosses, only the sealing lips 44 are crushed during the assembly of the flanges, the body 41 of the seal not being deformed.
  • the flexible joint integral with one of the two flat flanges of the manifold, on which it is glued or molded.
  • the flexible plate then comprises only a single sheet metal frame embedded in the elastomer in the vicinity of the only free surface.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

La présente invention a pour objet un circuit d'admission d'air ou de mélange gazeux pour les moteurs à combustion interne, notamment pour véhicules automobiles.The present invention relates to an air intake or gas mixture circuit for internal combustion engines, in particular for motor vehicles.

Généralement un moteur à combustion interne comprend plusieurs chambres de combustion munies chacune d'au moins un orifice d'admission périodiquement obturé par une soupape. Le circuit d'admission en air comburant alimentant les chambres de combustion, comporte principalement un conduit reliant une embouchure d'entrée à un collecteur d'admission lequel comprend un répartiteur ou plenum et plusieurs bras qui conduisent respectivement une partie de la masse gazeuse vers ledit orifice de chacune des chambres de combustion. Les dimensions du collecteur, longueur des conduits et volume du plenum, sont directement liées aux performances du moteur. Il en résulte une pièce de taille et/ou de masse importante, placée en porte-à-faux et liée rigidement à la culasse pour des raisons d'étanchéité.Generally an internal combustion engine comprises several combustion chambers each provided with at least one inlet orifice periodically closed by a valve. The combustion air intake circuit supplying the combustion chambers, mainly comprises a conduit connecting an inlet mouth to an intake manifold which comprises a distributor or plenum and several arms which respectively conduct part of the gas mass towards said orifice of each of the combustion chambers. The dimensions of the collector, length of the conduits and volume of the plenum, are directly related to the performance of the engine. This results in a part of large size and / or mass, placed in overhang and rigidly connected to the cylinder head for sealing reasons.

De part sa fonction et son implantation le circuit d'admission se trouve être le siège d'importantes vibrations. En effet les excitations du bloc moteur, bruits de combustion ou encore chocs de distribution, se répercutent directement le long du circuit d'admission. Par ailleurs le circuit est soumis aux pulsations de débit d'air aux soupapes qui se propagent le long de la tubulure d'admission à la vitesse du son, pour arriver à la prise d'air et créer ainsi "le bruit de bouche". Enfin à l'intérieur du circuit d'admission, la veine d'air est le siège de pulsations de pression qui font vibrer à leurs fréquences les parois des conduits.Due to its function and its location, the intake circuit is the seat of important vibrations. In fact, the excitations of the engine block, combustion noises or distribution shocks, have a direct impact on the intake circuit. Furthermore the circuit is subjected to pulsations of air flow to the valves which propagate along the intake manifold at the speed of sound, to reach the air intake and thus create "mouth noise". Finally inside the intake circuit, the air stream is the seat of pressure pulsations which vibrate at their frequencies the walls of the ducts.

Ces vibrations affectant le circuit d'admission sont des sources importantes de bruits et peuvent conduire d'autre part à la détérioration des organes placés sur le collecteur, comme les organes de mesure de température ou de pression ou encore comme le boîtier papillon dans le cas de moteur à allumage commandé.These vibrations affecting the intake circuit are significant sources of noise and can lead, on the other hand, to the deterioration of the organs placed on the manifold, such as the temperature or pressure measuring organs or even like the throttle body in the case. of a spark ignition engine.

Différentes solutions ont été proposées pour pallier à ces inconvénients.Different solutions have been proposed to overcome these drawbacks.

Une première solution consiste à renforcer la rigidité du circuit d'admission et du collecteur en particulier, par nervurage ou béquillage, de manière à repousser les fréquences de résonance au-delà du domaine de fonctionnement du moteur. S'il est alors possible de s'affranchir des modes basse fréquence, il n'est cependant pas possible de disposer d'un circuit d'admission d'une rigidité suffisante pour éviter les vibrations haute fréquence, génératrices de bruits audibles.A first solution consists in reinforcing the rigidity of the intake circuit and of the manifold in particular, by ribbing or bending, so as to push the resonant frequencies beyond the operating range of the engine. If it is then possible to get rid of low frequency modes, it is however not possible to have an intake circuit of sufficient rigidity to avoid high frequency vibrations, generating audible noise.

Une seconde solution consiste à intercaler une liaison souple dans le circuit d'admission de façon à réaliser un découplage. La publication Fr 2.315.012 décrit notamment un dispositif de montage souple du collecteur d'admission sur un moteur à combustion interne, caractérisé en ce que le collecteur se trouve pris en sandwich entre au moins deux épaisseurs d'élastomère situées l'une entre le collecteur et la culasse, l'autre entre le collecteur et chaque vis de fixation, de façon à éviter tout contact métallique direct entre le collecteur d'admission et la culasse. Une autre possibilité de découplage consiste à scinder le collecteur en deux parties au niveau des conduits, la première partie est fixée rigidement sur la culasse et la liaison avec la deuxième partie est réalisée pour chaque conduit grâce à un manchon cylindrique en matériau déformable. Le découplage généré par ce dispositif s'avère plus ou moins bon suivant la direction des sollicitations, la raideur des manchons étant très différente en cisaillement, flexion ou encore traction.A second solution consists in inserting a flexible connection in the intake circuit so as to effect decoupling. The publication Fr 2.315.012 describes in particular a device for flexible mounting of the intake manifold on an internal combustion engine, characterized in that the manifold is sandwiched between at least two thicknesses of elastomer, one between the manifold and the cylinder head, the other between the manifold and each fixing screw, so as to avoid any direct metallic contact between the intake manifold and the cylinder head. Another possibility of decoupling consists in dividing the collector into two parts at the level of the conduits, the first part is rigidly fixed on the cylinder head and the connection with the second part is made for each conduit thanks to a cylindrical sleeve made of deformable material. The decoupling generated by this device turns out to be more or less good depending on the direction of the stresses, the stiffness of the sleeves being very different in shear, bending or even traction.

La présente invention a pour but de réaliser un circuit d'admission qui évite les inconvénients précités, et assure au moteur -un fonctionnement plus silencieux.The object of the present invention is to produce an intake circuit which avoids the aforementioned drawbacks, and provides the engine with quieter operation.

Le circuit d'admission pour moteur à combustion interne, selon l'invention comprend un collecteur formé d'un répartiteur et d'une pluralité de bras destinés à alimenter chacun l'un des cylindres du moteur, chaque bras étant formé par deux éléments de conduit respectivement fixés au plenum et à la culasse du moteur.The intake circuit for an internal combustion engine according to the invention comprises a manifold formed by a distributor and a plurality of arms each intended to supply one of the engine cylinders, each arm being formed by two elements of ducts respectively fixed to the plenum and to the cylinder head of the engine.

Selon l'invention, le circuit d'admission est caractérisé en ce que les extrémités en regard des éléments de conduit de chacun des bras sont solidaires de brides latérales d'assemblage et en ce que un joint souple est intercalé entre lesdites brides, ledit joint agissant comme un filtre pour interdire la propagation des vibrations du moteur vers le collecteur.According to the invention, the intake circuit is characterized in that the opposite ends of the duct elements of each of the arms are integral with lateral assembly flanges and in that a flexible seal is interposed between said flanges, said seal acting as a filter to prevent the propagation of vibrations from the engine to the manifold.

selon une autre caractéristique de l'invention, ledit joint souple est formé d'un corps, réalisé en matériaux souple apte à amortir les vibrations tel que de l'élastomère, ledit corps présentant un passage en concordance avec les orifices des éléments de conduit dont il assure la jonction.according to another characteristic of the invention, said flexible seal is formed of a body, made of flexible materials capable of damping vibrations such as elastomer, said body having a passage in accordance with the orifices of the duct elements including it ensures the junction.

Selon une autre caractéristique de l'invention, ledit corps est muni de vis de fixation en saillie sur chacune des faces d'appui, chacune de ces vis étant apte à être insérée dans un perçage porté par la bride d'assemblage en regard.According to another characteristic of the invention, said body is provided with fixing screws projecting from each of the bearing faces, each of these screws being able to be inserted in a bore carried by the opposite assembly flange.

Selon une autre caractéristique de l'invention, ledit corps comportant au voisinage de ses faces d'appui des armatures métalliques.According to another characteristic of the invention, said body comprising, in the vicinity of its bearing faces, metal reinforcements.

Selon une autre caractéristique de l'invention, lesdites vis sont fixées audites armatures.According to another characteristic of the invention, said screws are fixed to said reinforcements.

Selon une autre caractéristique de l'invention, lesdites armatures présentent au niveau des vis des bossages qui affleurent les faces d'appui dudit corps.According to another characteristic of the invention, said reinforcements have at the level of the screws bosses which are flush with the bearing faces of said body.

Selon une autre caractéristique de l'invention, ledit corps présente au débouché du passage) des surépaisseurs ou lèvres destinées à assurer l'étanchéité lors du serrage dudit corps entre les brides.According to another characteristic of the invention, said body has at the outlet of the passage) extra thicknesses or lips intended to ensure sealing when the said body is clamped between the flanges.

Selon une autre caractéristique -de l'invention, la section desdits passages évolue le long de l'épaisseur dudit corps.According to another characteristic of the invention, the section of said passages evolves along the thickness of said body.

Selon une autre caractéristique de l'invention, un seul joint est intercalé entre les éléments de conduit de l'ensemble des bras, ledit joint étant alors formé par un corps monobloc présentant autant de passages que de bras.According to another characteristic of the invention, a single seal is interposed between the duct elements of the set of arms, said seal then being formed by a single-piece body having as many passages as there are arms.

Selon une autre caractéristique de l'invention, l'ensemble des différents éléments de conduit fixés au plénum sont solidaires d'une même bride latérale d'assemblage.According to another characteristic of the invention, all of the various duct elements fixed to the plenum are integral with the same lateral assembly flange.

Selon une autre caractéristique de l'invention, l'ensemble des différents éléments de conduits fixés à la culasse du moteur sont solidaires d'une même bride latérale d'assemblage.According to another characteristic of the invention, all of the various duct elements fixed to the cylinder head of the engine are integral with the same lateral assembly flange.

On comprendra mieux les buts, aspects et avantages de la présente invention, d'après la description donnée ci-après d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, en se référant aux dessins annexés, dans lesquels :

  • la figure 1 représente une vue générale schématique d'un moteur à combustion interne et de son circuit d'admission équipé selon l'invention ;
  • la figure 2 est une vue en perspective du joint souple inséré dans le circuit d'admission ;
  • la figure 3 est une vue du joint souple en coupe transversale suivant III-III de la figure 2, àéchelle agrandie.
The aims, aspects and advantages of the present invention will be better understood from the description given below of an embodiment of the invention, given by way of non-limiting example, with reference to the accompanying drawings, wherein :
  • FIG. 1 represents a general schematic view of an internal combustion engine and of its intake circuit equipped according to the invention;
  • Figure 2 is a perspective view of the flexible seal inserted into the intake circuit;
  • Figure 3 is a view of the flexible joint in cross section along III-III of Figure 2, on an enlarged scale.

On a représenté à la figure 1 le circuit d'admission d'un moteur à combustion interne 1, constitué par un moteur à quatre cylindres, diesel ou à allumage commandé. Chacune des quatre chambres de combustion comporte un orifice d'admission propre à être fermé par une soupape.There is shown in Figure 1 the intake circuit of an internal combustion engine 1, consisting of a four-cylinder engine, diesel or spark ignition. Each of the four combustion chambers has an inlet adapted to be closed by a valve.

Le circuit d'admission relie une embouchure d'entrée d'air non figurée à l'orifice d'admission de chacune des chambres, et est constitué à cet effet notamment d'un collecteur comprenant un répartiteur ou plenum 2 prolongé par quatre bras distincts 3 alimentant chacun l'un des cylindres.The intake circuit connects an air inlet mouth, not shown, to the intake orifice of each of the chambers, and is made up for this purpose in particular of a manifold comprising a distributor or plenum 2 extended by four separate arms. 3 each supplying one of the cylinders.

Chaque bras 3 est formé de deux éléments de conduit 3a et 3b respectivement fixés au plenum 2 et à la culasse du bloc moteur 1. Les extrémités en regard des éléments de conduit 3a et 3b sont assemblés avec interposition d'un joint souple 4 agissant comme un filtre pour interdire la propagation des vibrations du moteur vers le collecteur.Each arm 3 is formed by two conduit elements 3a and 3b respectively fixed to the plenum 2 and to the cylinder head of the engine block 1. The opposite ends of the conduit elements 3a and 3b are assembled with the interposition of a flexible joint 4 acting as a filter to prevent the propagation of vibrations from the motor to the collector.

Conformément à la figure 2, les extrémités en regard des éléments de conduit 3a et 3b sont solidaires de brides latérales plates d'assemblage respectivement 31a et 31b. Entre les deux brides plates sensiblement rectangulaires 31a et 31b est intercalé le joint souple 4.In accordance with FIG. 2, the opposite ends of the conduit elements 3a and 3b are integral with lateral flat assembly flanges 31a and 31b respectively. Between the two substantially rectangular flat flanges 31a and 31b is interposed the flexible seal 4.

Le joint souple est principalement constitué d'une plaque ou corps monobloc 41 de forme sensiblement identique aux brides plates 31a et 31b. Le corps 41 comporte quatre passages 42 alignés selon l'axe longitudinal, ces passages 42 étant disposés en concordance avec les orifices 32a et 32b des éléments de conduit 3a et 3b formant les bras 3 du collecteur.The flexible seal mainly consists of a one-piece plate or body 41 of shape substantially identical to the flat flanges 31a and 31b. The body 41 has four passages 42 aligned along the longitudinal axis, these passages 42 being arranged in accordance with the orifices 32a and 32b of the duct elements 3a and 3b forming the arms 3 of the manifold.

Le corps 41 est munie de vis de fixation 45 s'étendant en saillie sur les deux faces d'appui 4a et 4b. Les brides d'assemblage 31a et 31b présentent des perçages, respectivement 35a et 35b, pour le passage des vis 45. Le serrage des brides est alors opéré au moyen des écrous 25.The body 41 is provided with fixing screws 45 projecting from the two bearing faces 4a and 4b. The assembly flanges 31a and 31b have holes, respectively 35a and 35b, for the passage of the screws 45. The clamping of the flanges is then carried out by means of the nuts 25.

La figure 3 permet de préciser la réalisation du joint 4. Le corps 41 est réalisé en élastomère surmoulé, ou adhérisé, sur deux plaques distinctes en tôle d'acier emboutie, 43a et 43b, s'étendant chacune au voisinage d'une face latérale d'appui, respectivement 4a et 4b. Les plaques 43a, 43b assurent également l'encrage des vis de fixation 45, pour ce faire chaque vis est insérée dans un orifice calibré porté par la plaque réceptrice, l'extrémité filetée en saillie vers l'extérieur, jusqu'à ce que les têtes de vis soient en contact avec les plaques, les têtes de vis sont alors soudées sur ces dernières.Figure 3 specifies the embodiment of the seal 4. The body 41 is made of molded elastomer, or bonded, on two separate plates of stamped sheet steel, 43a and 43b, each extending in the vicinity of a side face support, respectively 4a and 4b. The plates 43a, 43b also ensure the anchoring of the fixing screws 45, to do this each screw is inserted into a calibrated orifice carried by the receiving plate, the threaded end projecting outwards, until the screw heads be in contact with the plates, the screw heads are then welded to the latter.

Les passages d'air 42, pratiqués à travers le corps 41, ont une section d'entrée et de sortie parfaitement adaptée aux conduits amont 3a et aval 3b dont ils assurent la jonction. La section rectangulaire figurée peut ainsi être également circulaire ou elliptique, il est également possible de faire varier la section dans l'épaisseur même de la plaque 41, par exemple pour former un convergent.The air passages 42, formed through the body 41, have an inlet and outlet section perfectly suited to the upstream 3a and downstream 3b conduits, of which they provide the junction. The rectangular section shown can thus also be circular or elliptical, it is also possible to vary the section in the very thickness of the plate 41, for example to form a convergent.

Le corps 41 présente au débouché de chaque orifice 42 une surépaisseur ou lèvre 44 destinée à assurer l'étanchéité lors du serrage. Ces lèvres d'étanchéité 44 permettent de diminuer les exigences de planéité et d'état de surface des brides plates 31a et 31b solidaires des éléments de conduit.The body 41 has, at the outlet of each orifice 42, an additional thickness or lip 44 intended to ensure sealing during tightening. These sealing lips 44 make it possible to reduce the requirements of flatness and surface condition of the flat flanges 31a and 31b integral with the duct elements.

La présence des armatures 43 à l'intérieur de la plaque 41 renforce la rigidité et la planéité des surfaces d'appui ce qui permet de n'utiliser qu'un nombre limité de vis de fixation. Par ailleurs au niveau des vis 45 les plaques présentent des bossages 47, obtenus par emboutissage, qui affleurent les faces d'appui. La fonction de ces bossages 47 est de contrôler le couple de serrage et d'empêcher tout risque de desserrage par fluage de l'élastomère ; de plus grâce à ces bossages, seules les lèvres d'étanchéité 44 sont écrasées lors de l'assemblage des brides, le corps 41 du joint n'étant pas déformé.The presence of the reinforcements 43 inside the plate 41 reinforces the rigidity and the flatness of the bearing surfaces, which makes it possible to use only a limited number of fixing screws. Furthermore, at the level of the screws 45, the plates have bosses 47, obtained by stamping, which are flush with the bearing faces. The function of these bosses 47 is to control the tightening torque and to prevent any risk of loosening by creep of the elastomer; moreover thanks to these bosses, only the sealing lips 44 are crushed during the assembly of the flanges, the body 41 of the seal not being deformed.

Bien entendu, l'invention n'est nullement limitée au mode de réalisation décrit et illustré qui n'a été donné qu'à titre d'exemple.Of course, the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example.

Ainsi il est possible de rendre le joint souple solidaire d'une des deux brides plates du collecteur, sur laquelle elle est collée ou surmoulée. La plaque souple ne comprend plus alors qu'une seule armature en tôle noyée dans l'élastomère au voisinage de la seule surface libre. Un tel mode de réalisation à pour avantage de simplifier la réalisation de la bride et de simplifier le montaqe du collecteur.Thus it is possible to make the flexible joint integral with one of the two flat flanges of the manifold, on which it is glued or molded. The flexible plate then comprises only a single sheet metal frame embedded in the elastomer in the vicinity of the only free surface. The advantage of such an embodiment is that it simplifies the production of the flange and simplifies the mounting of the collector.

Claims (6)

  1. An induction circuit for an internal combustion engine (1) comprising a manifold formed by a plenum chamber (2) and a plurality of arms (3) intended each to feed one of the cylinders of the engine, each arm (3) being formed by two duct elements (3a, 3b) respectively fixed to the plenum chamber (2) and to the cylinder head of the engine (1), the facing ends of the duct elements (3a, 3b) of each of the arms (3) being fixed with respect to lateral assembly flanges (31a, 31b) and a flexible joint (4) having a passage (42) in concordance with the orifices (32a, 32b) of the duct elements (3a, 3b) which it connects being interposed between said flanges (31a, 31b), said joint (4) being formed by a body (41) made of flexible material capable of damping vibrations and comprising in the vicinity of its contact faces (4a, 4b) metal reinforcements (43a, 43b) to which are fixed fixing screws (45) disposed in projecting relationship on each of the contact faces (4a, 4b), each of said screws (45) being capable of being inserted into a bore (35a, 35b) carried by the facing assembly flange (31a, 31b).
  2. An induction circuit according to claim 1 characterised in that said reinforcements (43a, 43b) have at the locations of the screws (45) bosses (47) which are level with the contact faces (4a, 4b) of said body (41).
  3. An induction circuit according to either one of claims 1 and 2 characterised in that said body (41) has at the mouth opening of the passage (42) increased-thickness portions or lips (44) intended to ensure sealing integrity When said body (41) is clamped between the flanges (31a, 31b).
  4. An induction circuit according to any one of claims 1 to 3 characterised in that the section of said passages (42) varies along the thickness of said body (41).
  5. An induction circuit according to any one of claims 1 to 4 characterised in that a single joint (4) is interposed between the duct elements (3a, 3b) of the assembly of the arms (3), said joint then being formed by a one-piece body (41) having as many passages as arms.
  6. An induction circuit according to any one of claims 1 to 5 characterised in that the assembly of the different duct elements (3a) which are fixed to the plenum chamber (2) and/or the assembly of the different duct elements (3b) which are fixed to the cylinder head of the engine (1) are fixed with respect to the same lateral assembly flange (31a, 31b).
EP19920402271 1991-08-13 1992-08-12 Induction system for internal combustion engines Expired - Lifetime EP0527683B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110267 1991-08-13
FR9110267A FR2680388B1 (en) 1991-08-13 1991-08-13 INTAKE CIRCUIT FOR INTERNAL COMBUSTION ENGINE.

Publications (2)

Publication Number Publication Date
EP0527683A1 EP0527683A1 (en) 1993-02-17
EP0527683B1 true EP0527683B1 (en) 1996-01-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920402271 Expired - Lifetime EP0527683B1 (en) 1991-08-13 1992-08-12 Induction system for internal combustion engines

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EP (1) EP0527683B1 (en)
DE (1) DE69207508T2 (en)
FR (1) FR2680388B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195513A3 (en) * 1998-06-24 2002-05-15 Siemens Canada Limited Manifold housing system
DE10346005B4 (en) * 2003-10-02 2006-04-13 Siemens Ag Air intake module for an internal combustion engine with impulse charging
US10704512B2 (en) 2015-09-22 2020-07-07 Cummins Inc. Segmented manifold head connectors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4372120A (en) * 1979-10-26 1983-02-08 General Motors Corporation V-Type engine intake with vibration isolated manifold connector
US4901681A (en) * 1988-08-26 1990-02-20 General Motors Corporation Motion isolated engine manifold
JPH02125955A (en) * 1988-11-04 1990-05-14 Texas Instr Japan Ltd Fluid feeding device and thermal insulation device

Also Published As

Publication number Publication date
DE69207508D1 (en) 1996-02-22
FR2680388A1 (en) 1993-02-19
FR2680388B1 (en) 1995-03-24
DE69207508T2 (en) 1996-08-22
EP0527683A1 (en) 1993-02-17

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