EP0931926B1 - Internal combustion engine with compact intake system - Google Patents

Internal combustion engine with compact intake system Download PDF

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Publication number
EP0931926B1
EP0931926B1 EP19990400144 EP99400144A EP0931926B1 EP 0931926 B1 EP0931926 B1 EP 0931926B1 EP 19990400144 EP19990400144 EP 19990400144 EP 99400144 A EP99400144 A EP 99400144A EP 0931926 B1 EP0931926 B1 EP 0931926B1
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EP
European Patent Office
Prior art keywords
cover
intake manifold
internal combustion
chamber
combustion engine
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
EP19990400144
Other languages
German (de)
French (fr)
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EP0931926A1 (en
Inventor
Bruno Covin
Pierre Gonzalez
Xavier Decomble
Patrick Mollard
Didier Torlet
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Renault SAS
Original Assignee
Renault SAS
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Publication date
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Publication of EP0931926A1 publication Critical patent/EP0931926A1/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
    • F02M35/104—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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F02M35/10209—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
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • 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
    • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • 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
    • F02M35/02—Air cleaners

Definitions

  • the present invention relates to a internal combustion engine for equipping in particular a motor vehicle.
  • the current invention relates more particularly to the circuit air intake.
  • the air intake circuit of an engine consists of upstream to downstream in the direction of the air flow of an air filter, of a butterfly housing (in the case of spark ignition engines), a shaped collector a cavity or plenum from which a plurality ducts and intake ducts in the cylinder head, these ducts formed in the cylinder head opening into the combustion chambers through orifices closed selectively by valves.
  • Elements of the air intake system other than the intake ducts in the breech are usually housed outside the engine in the engine compartment. Given the evolution of motor vehicle design, the dimensions of this engine compartment are today more and more reduced and so it is important to make more and more compact this air circuit.
  • the object of the present invention is therefore to improve the existing state of the art by doing support the entire external air circuit of the motor by the upper part of the engine.
  • the internal combustion engine according to the invention is of the type comprising a circuit air intake comprising an air filter, a butterfly housing and an intake manifold, the intake manifold consisting of a cavity dispatcher and a plurality of conduits to supply the ducts corresponding intake in the cylinder head.
  • the combustion engine internal is characterized in that the collector inlet, throttle body and air filter are positioned above the cylinder head cover.
  • the upstream and downstream ends of the butterfly casing are directly fitted into openings corresponding air filter and manifold intake.
  • the upstream and downstream ends of the throttle body are radially surrounded by an O-ring intended for seal and maintain in position these ends in the corresponding openings air filter and intake manifold.
  • the engine has a gas separation chamber casing formed directly from foundry, this settling chamber being defined by a first cavity formed on the upper face of the cylinder head cover and a second shape cavity complement in a cover intended for to close said first cavity.
  • the cavity distributor of the intake manifold directly on the lid closing the chamber of decantation of the crankcase gases in the cylinder head cover a simple calibrated hole through the bottom wall of the cover cooperating with a corresponding opening through the wall bottom facing the distribution cavity allows to recycle crankcase gases directly in the intake manifold.
  • the intake manifold and the throttle housing are fixed directly on the lid of the chamber of decantation of the crankcase gases.
  • the cover of the gas settling chamber integrated casing coming from foundry an element of pipeline for the transfer of gas additional to the air intake circuit, this pipe element opening at its end downstream by an end projecting projecting on the top of the lid, this nozzle being adapted for penetrate into the distributing cavity of the collector admission through a corresponding opening.
  • the cover of the gas settling chamber casing incorporates a tubular duct element debouching into the settling chamber and intended to cooperate with an opening corresponding to the air filter, this element of conduit for recycling crankcase gases directly into the air filter.
  • a cylinder head cover 1 from covering the cylinder head 10 with an engine internal combustion of the multicylinder type intended in particular to equip a motor vehicle.
  • the engine features otherwise and conventionally, a non-illustrated casing formed of a cylinder block with at its lower part an oil tank.
  • an open cavity 2 defining the lower part of the recovery chamber 3 and decanting the escaped flue gases in the crankcase through the different games Operating.
  • the cavity 2 is closed by a cover 4 coming from foundry that is attached to the top cylinder cover 1 by appropriate means.
  • This cover 4 has an interior cavity 5 of form substantially conjugate to that of the cavity 2, defining the upper part of the chamber Decantation 3.
  • the settling chamber 3 is located thus, according to the embodiment described, shared substantially equally between the cylinder cover 1 and cover 4. Of course, it is possible to modify the proportions respective settling chamber in the cylinder head cover 1 and the cover 4.
  • the collector intake 23, the throttle housing 30 and the filter 50 to air motor air intake system are arranged above the cylinder head cover 1 and relies on the latter especially through cover 4.
  • the intake manifold is fixed directly on the cover 4 by means of non-figured fasteners cooperating with flanges 28 carried by the intake manifold 23 and counter flanges 48 arranged on the top of the cover 4. It should be noted that the counter-flanges 48 are adapted to also serve as flanges to fix the cover 4 on the cylinder head cover 1.
  • the cover 4 also integrates foundry, a line 40 element that opens at its downstream end by a tip 41 projecting from the top of the lid 4. This tip 41 is adapted to penetrate the intake manifold 23 through the opening 22 and open into the distribution cavity 25 substantially above the orifice 12.
  • This line element 40 can be connected at its downstream end to the circuit of recirculation of the crankcase gases, to the circuit of bleed fuel vapors trapped in the canister or again, to the air intake circuit idle in the case where the latter is not integrated at the butterfly box 30.
  • the intake manifold 23 presents by elsewhere, a circular opening 29 formed between the two flanges 28, through the side wall opposite to the pipes 26 of the distribution cavity 25 of the collector 23. It's directly in this opening 29 that is fitted the downstream end of the butterfly housing 30. This downstream end is surrounded by a toric seal 31 which ensures the perfect seal between the collector intake and throttle housing 30 as well as the holding in position of this end in the corresponding opening 29 of the collector intake.
  • the butterfly box 30 just like the intake manifold 23 is directly attached to the cover 4 by means of fixing screws figured cooperating with flanges 33 worn by the throttle body 30 and counter-flanges 43 arranged on the lateral face next to the cover 4.
  • the upstream end of the butterfly housing 30 is fitted similarly to the downstream end in a corresponding opening 59 of the filter air 50.
  • a joint O-ring sealing radially the upstream end of the throttle body 30 ensures the tightness of the assembly between the latter and the air filter 50.
  • the butterfly housing is thus directly connected to the intake manifold on the one hand and the air filter on the other hand without additional connecting lines and without particular fixing device.
  • the fitting downstream and upstream ends of the butterfly housing 30 in respectively the opening 29 of the collector intake 23 and the opening 59 of the air filter 50 is enough to ensure the tightness of the assembly.
  • the lid 4 integrates a tubular duct element 45 intended to come directly to get into a corresponding opening 51 of the air filter 50.
  • the device for recirculating gases crankcase of the type with two branches a branch coming to connect to the intake circuit in downstream of the throttle housing 30 and a high branch connecting to the upstream intake circuit of the throttle body 30, connects to the circuit admission directly without recourse to any reported piping.
  • the assembly of different elements making up the circuit air intake as well as the connection of this one to the additional introductory circuits of gas can operate extremely simple, because of a reduced number of pieces, parts obtained mainly from molding and requiring only a limited number of operations machining.

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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)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

La présente invention se rapporte à un moteur à combustion interne destiné à équiper notamment un véhicule automobile. La présente invention concerne plus particulièrement le circuit d'admission d'air.The present invention relates to a internal combustion engine for equipping in particular a motor vehicle. The current invention relates more particularly to the circuit air intake.

Classiquement le circuit d'admission d'air d'un moteur se compose de l'amont vers l'aval dans le sens de l'écoulement de l'air d'un filtre à air, d'un boítier papillon (dans le cas notamment des moteurs à allumage commandé), d'un collecteur formé d'une cavité ou plenum d'où partent une pluralité de conduites et, des conduits d'admission ménagés dans la culasse, ces conduits ménagés dans la culasse débouchant dans les chambres de combustion par des orifices fermés sélectivement par des soupapes.Classically the air intake circuit of an engine consists of upstream to downstream in the direction of the air flow of an air filter, of a butterfly housing (in the case of spark ignition engines), a shaped collector a cavity or plenum from which a plurality ducts and intake ducts in the cylinder head, these ducts formed in the cylinder head opening into the combustion chambers through orifices closed selectively by valves.

Les éléments du circuit d'admission d'air autres que les conduits d'admission ménagés dans la culasse sont généralement logés à l'extérieur du moteur dans le compartiment moteur. Compte tenu de l'évolution du design des véhicules automobiles, les dimensions de ce compartiment moteur sont aujourd'hui de plus en plus réduites et il est donc important de rendre de plus en plus compact ce circuit d'air.Elements of the air intake system other than the intake ducts in the breech are usually housed outside the engine in the engine compartment. Given the evolution of motor vehicle design, the dimensions of this engine compartment are today more and more reduced and so it is important to make more and more compact this air circuit.

Parmi les différentes solutions proposées, il est connu de faire supporter le collecteur d'admission par le moteur comme cela est notamment décrit dans le brevet n°FR90-08075, déposé par la Demanderesse, où la solution retenue consiste à intégrer le collecteur d'admission au couvre-culasse du moteur. Selon cet art antérieur, les conduits d'admission ménagés dans la culasse sont orientés vers le haut pour déboucher sur la face supérieure de la culasse au voisinage de l'un des bords longitudinaux. De la sorte, les conduites correspondantes du collecteur d'admission intégrées au couvre-culasse peuvent utiliser toute la largeur du couvre-culasse, l'ensemble demeurant extrêmement ramassé et d'encombrement minimal.Among the various solutions proposed, it is known to support the collector intake by the engine as this is including described in patent FR90-08075, filed by the Applicant, where the chosen solution consists of integrate the intake manifold with the cylinder head cover of the motor. According to this prior art, intake ducts in the cylinder head are facing upwards to open on the face top of the breech in the vicinity of one of the longitudinal edges. In this way, the pipes integrated intake manifold to the cylinder head cover can use the full width the cylinder cover, the whole remaining extremely picked up and minimal clutter.

Les solutions connues selon l'art antérieur se limitent toutefois à placer le collecteur au-dessus du moteur, le reste du circuit d'air demeurant positionné dans le compartiment moteur ou venant se raccrocher au bloc-moteur aux moyens de brides de fixation. De tels montages demeurent encore trop encombrants et peuvent être sources de vibrations et donc de bruyance.Known solutions according to the prior art however, are limited to placing the collector above of the engine, the rest of the air circuit remaining positioned in the engine compartment or coming to hang on to the engine block to the means of clamps. Such arrangements remain still too bulky and can be sources of vibrations and therefore noisiness.

L'objet de la présente invention est donc d'améliorer l'état de l'art existant en faisant supporter l'ensemble du circuit d'air externe du moteur par la partie haute du moteur.The object of the present invention is therefore to improve the existing state of the art by doing support the entire external air circuit of the motor by the upper part of the engine.

Le moteur à combustion interne selon l'invention est du type comprenant un circuit d'admission d'air comportant un filtre à air, un boítier papillon et un collecteur d'admission, le collecteur d'admission se composant d'une cavité répartitrice et d'une pluralité de conduites individuelles destinées à alimenter les conduits d'admission correspondants ménagés dans la culasse. The internal combustion engine according to the invention is of the type comprising a circuit air intake comprising an air filter, a butterfly housing and an intake manifold, the intake manifold consisting of a cavity dispatcher and a plurality of conduits to supply the ducts corresponding intake in the cylinder head.

Selon l'invention, le moteur à combustion interne est caractérisé en ce que le collecteur d'admission, le boítier papillon et le filtre à air sont positionnés au-dessus du couvre-culasse.According to the invention, the combustion engine internal is characterized in that the collector inlet, throttle body and air filter are positioned above the cylinder head cover.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, les extrémités amont et aval du bottier papillon sont directement emmanchées dans des ouvertures correspondantes du filtre à air et du collecteur d'admission.According to another characteristic of the engine internal combustion object of the invention, the upstream and downstream ends of the butterfly casing are directly fitted into openings corresponding air filter and manifold intake.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, les extrémités amont et aval du boítier papillon sont entourées radialement d'un joint torique destiné à assurer l'étanchéité et le maintien en position de ces extrémités dans les ouvertures correspondantes du filtre à air et du collecteur d'admission.According to another characteristic of the engine internal combustion object of the invention, the upstream and downstream ends of the throttle body are radially surrounded by an O-ring intended for seal and maintain in position these ends in the corresponding openings air filter and intake manifold.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, le moteur comporte une chambre de décantation des gaz de carter formée directement de fonderie, cette chambre de décantation étant définie par une première cavité ménagée sur la face supérieure du couvre-culasse et une seconde cavité de forme complémentaire ménagée dans un couvercle destiné à venir fermer ladite première cavité.According to another characteristic of the engine internal combustion object of the invention, the engine has a gas separation chamber casing formed directly from foundry, this settling chamber being defined by a first cavity formed on the upper face of the cylinder head cover and a second shape cavity complement in a cover intended for to close said first cavity.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, la cavité répartitrice du collecteur d'admission repose directement sur le couvercle fermant la chambre de décantation des gaz de carter ménagée dans le couvre-culasse, un simple perçage calibré à travers la paroi de fond du couvercle coopérant avec une ouverture correspondante ménagée à travers la paroi inférieure en regard de la cavité répartitrice permet de recycler les gaz de carter directement dans le collecteur d'admission.According to another characteristic of the engine internal combustion object of the invention, the cavity distributor of the intake manifold directly on the lid closing the chamber of decantation of the crankcase gases in the cylinder head cover, a simple calibrated hole through the bottom wall of the cover cooperating with a corresponding opening through the wall bottom facing the distribution cavity allows to recycle crankcase gases directly in the intake manifold.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, le collecteur d'admission et le boítier papillon sont fixés directement sur le couvercle de la chambre de décantation des gaz de carter.According to another characteristic of the engine internal combustion object of the invention, the intake manifold and the throttle housing are fixed directly on the lid of the chamber of decantation of the crankcase gases.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, le couvercle de la chambre de décantation des gaz de carter intègre venant de fonderie un élément de canalisation servant au transfert de gaz additionnels vers le circuit d'admission d'air, cet élément de canalisation débouchant à son extrémité aval par un embout s'étendant en saillie sur le dessus du couvercle, cet embout étant adapté pour pénétrer dans la cavité répartitrice du collecteur d'admission à travers une ouverture correspondante.According to another characteristic of the engine internal combustion object of the invention, the cover of the gas settling chamber integrated casing coming from foundry an element of pipeline for the transfer of gas additional to the air intake circuit, this pipe element opening at its end downstream by an end projecting projecting on the top of the lid, this nozzle being adapted for penetrate into the distributing cavity of the collector admission through a corresponding opening.

Selon une autre caractéristique du moteur à combustion interne objet de l'invention, le couvercle de la chambre de décantation des gaz de carter intègre un élément de conduit tubulaire débouchant dans la chambre de décantation et destiné à coopérer avec une ouverture correspondante du filtre à air, cet élément de conduit permettant de recycler les gaz de carter directement dans le filtre à air. According to another characteristic of the engine internal combustion object of the invention, the cover of the gas settling chamber casing incorporates a tubular duct element debouching into the settling chamber and intended to cooperate with an opening corresponding to the air filter, this element of conduit for recycling crankcase gases directly into the air filter.

On comprendra mieux les buts, aspects et avantages de la présente invention, d'après la description détaillée qui suit 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 est une vue en perspective éclatée d'un couvre-culasse de moteur à combustion interne équipé d'un circuit d'admission conforme à l'invention
  • la figure 2 est une vue similaire à la figure 1 précisant le positionnement du collecteur d'admission et du papillon des gaz sur le couvre-culasse ;
  • la figure 3 est une vue en coupe partielle, selon un plan parallèle à l'axe longitudinal du moteur, du couvre culasse et du collecteur d'admission ;
  • la figure 4 est une vue en coupe partielle, selon un plan perpendiculaire à l'axe longitudinal du moteur, du couvre culasse, du collecteur d'admission et du filtre à air.
The aims, aspects and advantages of the present invention will be better understood from the following detailed description of an embodiment of the invention given by way of non-limiting example, with reference to the accompanying drawings, in which: :
  • FIG. 1 is an exploded perspective view of an internal combustion engine cylinder head cover equipped with an intake circuit according to the invention;
  • Figure 2 is a view similar to Figure 1 specifying the positioning of the intake manifold and the throttle valve on the cylinder head cover;
  • Figure 3 is a partial sectional view along a plane parallel to the longitudinal axis of the engine, the cylinder head cover and the intake manifold;
  • Figure 4 is a partial sectional view along a plane perpendicular to the longitudinal axis of the engine, the cylinder head cover, the intake manifold and the air filter.

Conformément aux figures, seuls les éléments nécessaires à la compréhension de l'invention ont été représentés. De plus, pour faciliter la lecture des dessins, les mêmes pièces portent les mêmes références d'une figure à l'autre. According to the figures, only the elements necessary for the understanding of the invention have been represented. In addition, for facilitate the reading of drawings, the same pieces bear the same references of a figure to the other.

En se reportant aux figures 1 à 4, on a représenté schématiquement un couvre-culasse 1 venant recouvrir la culasse 10 d'un moteur à combustion interne du type multicylindre destiné notamment à équiper un véhicule automobile. Le moteur comporte par ailleurs et de façon classique, un carter non figuré, formé d'un bloc-cylindres avec à sa partie inférieure un réservoir d'huile.Referring to Figures 1-4, we have schematically represented a cylinder head cover 1 from covering the cylinder head 10 with an engine internal combustion of the multicylinder type intended in particular to equip a motor vehicle. The engine features otherwise and conventionally, a non-illustrated casing formed of a cylinder block with at its lower part an oil tank.

Dans la fonderie même du couvre-culasse 1 et en saillie sur la face supérieure de ce dernier, est ménagée une cavité ouverte 2 définissant la partie inférieure de la chambre de récupération 3 et de décantation des gaz de combustion échappés dans le carter-moteur à travers les différents jeux de fonctionnement.In the same foundry of the cylinder head cover 1 and protruding on the upper face of the latter, is formed an open cavity 2 defining the lower part of the recovery chamber 3 and decanting the escaped flue gases in the crankcase through the different games Operating.

De façon classique des passages appropriés ménagés à travers le bloc-cylindres et la culasse 10 qui le surmonte permettent de mettre en communication l'ensemble des parties du carter-moteur avec le couvre-culasse 1 et la cavité 2.Classically appropriate passages arranged through the cylinder block and the cylinder head 10 who overcomes it allows to put in communication all parts of the crankcase with the cylinder head cover 1 and the cavity 2.

La cavité 2 est fermée par un couvercle 4 venant de fonderie qui vient se fixer sur le dessus du couvre-culasse 1 par des moyens appropriés. Ce couvercle 4 présente une cavité intérieure 5 de forme sensiblement conjuguée à celle de la cavité 2, définissant la partie supérieure de la chambre de décantation 3.The cavity 2 is closed by a cover 4 coming from foundry that is attached to the top cylinder cover 1 by appropriate means. This cover 4 has an interior cavity 5 of form substantially conjugate to that of the cavity 2, defining the upper part of the chamber Decantation 3.

La chambre de décantation 3 se trouve ainsi, selon le mode de réalisation décrit, partagée de façon sensiblement égale entre le couvre-culasse 1 et le couvercle 4. Bien évidement, il est possible de modifier les proportions respectives de la chambre de décantation contenues dans le couvre-culasse 1 et le couvercle 4.The settling chamber 3 is located thus, according to the embodiment described, shared substantially equally between the cylinder cover 1 and cover 4. Of course, it is possible to modify the proportions respective settling chamber in the cylinder head cover 1 and the cover 4.

Conformément à l'invention, le collecteur d'admission 23, le boítier papillon 30 et le filtre 50 à air du circuit d'admission d'air du moteur, sont disposés au-dessus du couvre-culasse 1 et repose sur ce dernier notamment par l'intermédiaire du couvercle 4.According to the invention, the collector intake 23, the throttle housing 30 and the filter 50 to air motor air intake system, are arranged above the cylinder head cover 1 and relies on the latter especially through cover 4.

Le collecteur d'admission 23, qui se compose classiquement d'une cavité répartitrice ou plenum 25 et d'une pluralité de conduites individuelles 26 destinées à alimenter les conduits correspondants ménagés dans la culasse 10, est conformé de façon que la cavité répartitrice 25 soit positionnée sensiblement à l'aplomb du couvercle 4.The intake manifold 23, which conventionally composes a distribution cavity or plenum 25 and a plurality of pipes 26 individual for supplying the conduits corresponding in the cylinder head 10, is shaped so that the distribution cavity 25 is positioned substantially in line with the cover 4.

Grâce au positionnement du collecteur d'admission 23 directement au-dessus du couvercle 4, la connexion de la chambre de décantation 3 au collecteur d'admission 23 peut alors s'opérer directement sans conduite rapportée. Ainsi, un simple perçage 12 dans le toit du couvercle 4 coopérant avec une ouverture 22 ménagée à travers la paroi inférieure en regard de la cavité répartitrice 25 du collecteur 23, permet de recycler les gaz de carter directement dans celle-ci. Un joint 27 d'étanchéité est agencé autour de l'ouverture 22, pour être interposé entre le collecteur d'admission 23 et le couvercle 4, et ainsi assurer l'étanchéité du montage. Thanks to the positioning of the collector inlet 23 directly above the lid 4, the connection of the settling chamber 3 to intake manifold 23 can then operate directly without reported conduct. So, a simple drilling 12 in the roof of the lid 4 cooperating with an opening 22 formed through the lower wall opposite the cavity distributor 25 of the collector 23, allows recycle the crankcase gases directly into the crankcase. A seal 27 is arranged around the opening 22, to be interposed between the intake manifold 23 and the lid 4, and thus ensure the tightness of the assembly.

Le collecteur d'admission est fixé directement sur le couvercle 4 au moyen de vis de fixation non figurées coopérant avec des brides 28 portées par le collecteur d'admission 23 et des contre-brides 48 disposées sur le dessus du couvercle 4. Il est à noter que les contre-brides 48 sont adaptées pour servir également de brides pour fixer le couvercle 4 sur le couvre-culasse 1.The intake manifold is fixed directly on the cover 4 by means of non-figured fasteners cooperating with flanges 28 carried by the intake manifold 23 and counter flanges 48 arranged on the top of the cover 4. It should be noted that the counter-flanges 48 are adapted to also serve as flanges to fix the cover 4 on the cylinder head cover 1.

Le couvercle 4 intègre par ailleurs venant de fonderie, un élément de canalisation 40 qui débouche à son extrémité aval par un embout 41 s'étendant en saillie sur le dessus du couvercle 4. Cet embout 41 est adapté pour pénétrer dans le collecteur d'admission 23 à travers l'ouverture 22 et déboucher dans la cavité répartitrice 25 sensiblement au-dessus de l'orifice 12.The cover 4 also integrates foundry, a line 40 element that opens at its downstream end by a tip 41 projecting from the top of the lid 4. This tip 41 is adapted to penetrate the intake manifold 23 through the opening 22 and open into the distribution cavity 25 substantially above the orifice 12.

Cet élément de canalisation 40 peut être connecté à son extrémité aval au circuit de recirculation des gaz de carter, au circuit de purge des vapeurs de carburant piégées dans le canister ou encore, au circuit d'admission d'air ralenti dans le cas où ce dernier n'est pas intégré au boítier papillon 30.This line element 40 can be connected at its downstream end to the circuit of recirculation of the crankcase gases, to the circuit of bleed fuel vapors trapped in the canister or again, to the air intake circuit idle in the case where the latter is not integrated at the butterfly box 30.

L'intégration de cet élément de canalisation 40 au couvercle 4 simplifie considérablement la connexion du circuit d'amener des gaz additionnels correspondants au circuit d'admission d'air, puisque le simple montage du collecteur 23 sur le couvercle 4 assure cette connexion. The integration of this element of line 40 to cover 4 simplifies considerably the connection of the circuit to bring additional gases corresponding to the circuit air intake, since the simple assembly of the manifold 23 on the lid 4 ensures this connection.

Le collecteur d'admission 23 présente par ailleurs, une ouverture circulaire 29 ménagée entre les deux brides 28, à travers la paroi latérale opposée aux conduites 26 de la cavité répartitrice 25 du collecteur 23. C'est directement dans cette ouverture 29 qu'est emmanchée l'extrémité aval du boítier papillon 30. Cette extrémité aval est entourée d'un joint d'étanchéité torique 31 qui assure la parfaite étanchéité entre le collecteur d'admission et le boítier papillon 30 ainsi que le maintien en position de cette extrémité dans l'ouverture 29 correspondante du collecteur d'admission.The intake manifold 23 presents by elsewhere, a circular opening 29 formed between the two flanges 28, through the side wall opposite to the pipes 26 of the distribution cavity 25 of the collector 23. It's directly in this opening 29 that is fitted the downstream end of the butterfly housing 30. This downstream end is surrounded by a toric seal 31 which ensures the perfect seal between the collector intake and throttle housing 30 as well as the holding in position of this end in the corresponding opening 29 of the collector intake.

Le boítier papillon 30 tout comme le collecteur d'admission 23 est directement fixé sur le couvercle 4 au moyen de vis de fixation non figurées coopérant avec des brides 33 portées par le boítier papillon 30 et des contre-brides 43 disposées sur la face latérale en regard du couvercle 4.The butterfly box 30 just like the intake manifold 23 is directly attached to the cover 4 by means of fixing screws figured cooperating with flanges 33 worn by the throttle body 30 and counter-flanges 43 arranged on the lateral face next to the cover 4.

L'extrémité amont du boítier papillon 30 est emmanchée de façon similaire à l'extrémité aval dans une ouverture correspondante 59 du filtre à air 50. De façon tout aussi similaire, un joint d'étanchéité torique entourant radialement l'extrémité amont du boítier papillon 30 assure l'étanchéité du montage entre ce dernier et le filtre à air 50.The upstream end of the butterfly housing 30 is fitted similarly to the downstream end in a corresponding opening 59 of the filter air 50. In a similar way, a joint O-ring sealing radially the upstream end of the throttle body 30 ensures the tightness of the assembly between the latter and the air filter 50.

Le boítier papillon se trouve ainsi directement connecté au collecteur d'admission d'une part et au filtre à air d'autre part sans conduites additionnelles de raccordement et sans dispositif de fixation particulier. L'emmanchement des extrémités aval et amont du boítier papillon 30 dans respectivement l'ouverture 29 du collecteur d'admission 23 et l'ouverture 59 du filtre à air 50 suffit à assurer l'étanchéité du montage.The butterfly housing is thus directly connected to the intake manifold on the one hand and the air filter on the other hand without additional connecting lines and without particular fixing device. The fitting downstream and upstream ends of the butterfly housing 30 in respectively the opening 29 of the collector intake 23 and the opening 59 of the air filter 50 is enough to ensure the tightness of the assembly.

La proximité immédiate du filtre à air 50 du couvercle 4 permet par ailleurs d'opérer directement la connexion de la chambre de décantation 3 au circuit d'admission en amont du volet papillon. Pour ce faire, le couvercle 4 intègre de fonderie un élément de conduit tubulaire 45 destiné à venir directement s'emmancher dans une ouverture correspondante 51 du filtre à air 50.The immediate proximity of the air filter 50 of the lid 4 allows moreover to operate directly the connection of the chamber of decantation 3 to the intake circuit upstream of the butterfly flap. To do this, the lid 4 integrates a tubular duct element 45 intended to come directly to get into a corresponding opening 51 of the air filter 50.

Grâce donc au circuit d'admission selon l'invention, le dispositif de recirculation des gaz de carter du type à deux branches, une branche basse venant se raccorder au circuit d'admission en aval du boítier papillon 30 et une branche haute venant se raccorder au circuit d'admission en amont du boítier papillon 30, se connecte au circuit d'admission directement sans recours à de quelconques conduites rapportées.Thanks to the intake circuit according to the invention, the device for recirculating gases crankcase of the type with two branches, a branch coming to connect to the intake circuit in downstream of the throttle housing 30 and a high branch connecting to the upstream intake circuit of the throttle body 30, connects to the circuit admission directly without recourse to any reported piping.

Ainsi, grâce à l'invention, le montage des différents éléments composant le circuit d'admission d'air ainsi que le raccordement de celui-ci aux circuits additionnels d'introduction de gaz (gaz de carter, gaz brûlés recirculés (EGR), etc..) peuvent s'opérer de façon extrêmement simple, du fait d'un nombre réduit de pièces, pièces obtenues principalement de moulage et ne nécessitant qu'un nombre limité d'opérations d'usinage. Thus, thanks to the invention, the assembly of different elements making up the circuit air intake as well as the connection of this one to the additional introductory circuits of gas (crankcase gases, recirculated flue gases (RMS), etc ..) can operate extremely simple, because of a reduced number of pieces, parts obtained mainly from molding and requiring only a limited number of operations machining.

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 only been given as an example.

Claims (6)

  1. Internal combustion engine of the type comprising an air intake system comprising an air filter (50), a throttle housing (30) and an intake manifold (23), said intake manifold (23) being composed of a distribution chamber (25) and of a plurality of individual ducts (26) intended for supplying the corresponding intake ducts made in the cylinder head (10), characterised in that the intake manifold (23), the throttle housing (30) and the air filter (50) are positioned above the rocker cover (1), the upstream and downstream extremities of the throttle housing being directly fitted into the corresponding apertures (59, 29) of the air filter (50) and of the intake manifold (23), the engine also comprising a settling chamber (3) for the casing gases formed directly by casting, said settling chamber (3) being defined by a first chamber (2) made on the upper face of the rocker cover (1) and a second chamber of a complementary shape (5) made in a cover (4) intended to close off said first chamber (2).
  2. Internal combustion engine according to claim 1, characterised in that the upstream and downstream extremities of the throttle housing are surrounded radially by an O-ring (32, 31) intended to provide sealing and retention in position of said extremities in the corresponding apertures of the air filter (50) and the intake manifold (23).
  3. Internal combustion engine according to claim 1 or 2, characterised in that the distribution chamber (25) of the intake manifold rests directly upon the cover (4) closing off the settling chamber for the casing gases made in the rocker cover (1), a single calibrated bore (12) through the base wall of the cover (4) cooperating with a corresponding aperture (22) made through the lower wall opposite the distribution chamber (25) allows the casing gases to be directly recycled in the intake manifold (23).
  4. Internal combustion engine according to any one of claims 1 to 3, characterised in that the intake manifold (23) and the throttle housing (30) are fixed directly onto the cover (4).
  5. Internal combustion engine according to any one of claims 1 to 4, characterised in that the cover (4) integrates, when cast, a channelling element (40) that serves to transfer additional gases towards the air intake system, said channelling element (40) opening out at its downstream extremity with a fitting (41) extending in a projecting manner on the top of the cover (4), said fitting (41) being configured to penetrate into the distribution chamber (25) of the intake manifold (23) through a corresponding aperture (22).
  6. Internal combustion engine according to any one of claims 1 to 7, characterised in that the cover (4) integrates a tubular duct element (45) opening out into the settling chamber (3) and intended to cooperate with a corresponding aperture (51) of the air filter (50), said duct element (45) allowing the casing gases to be directly recycled in the air filter (50).
EP19990400144 1998-01-23 1999-01-22 Internal combustion engine with compact intake system Expired - Lifetime EP0931926B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800701 1998-01-23
FR9800701A FR2774130B1 (en) 1998-01-23 1998-01-23 INTERNAL COMBUSTION ENGINE HAVING A COMPACT AIR INTAKE CIRCUIT

Publications (2)

Publication Number Publication Date
EP0931926A1 EP0931926A1 (en) 1999-07-28
EP0931926B1 true EP0931926B1 (en) 2003-08-13

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EP19990400144 Expired - Lifetime EP0931926B1 (en) 1998-01-23 1999-01-22 Internal combustion engine with compact intake system

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EP (1) EP0931926B1 (en)
DE (1) DE69910269T2 (en)
ES (1) ES2200476T3 (en)
FR (1) FR2774130B1 (en)

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Publication number Priority date Publication date Assignee Title
DE202012009863U1 (en) * 2012-10-16 2014-01-20 Reinz-Dichtungs-Gmbh Valve cover and internal combustion engine

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JP3779270B2 (en) * 2000-07-28 2006-05-24 ビステオン グローバル テクノロジーズ インコーポレイテッド Air intake device for internal combustion engine
JP3864100B2 (en) * 2002-02-18 2006-12-27 日産自動車株式会社 Intake device for internal combustion engine
DE10336196A1 (en) 2003-08-07 2005-03-03 Daimlerchrysler Ag Suction module for an internal combustion engine
FR2920486B1 (en) * 2007-09-03 2013-11-29 Renault Sas AIR FILTER HOUSING OF A COMBUSTION ENGINE OF A MOTOR VEHICLE.
FR2924171B1 (en) * 2007-11-26 2013-11-22 Renault Sas PLATE SUPERIOR WALL ADDITION AIR DISTRIBUTOR
DE202008005019U1 (en) * 2008-04-10 2009-08-20 Mann+Hummel Gmbh Cylinder head cover for a cylinder head of an internal combustion engine

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FR2660017B1 (en) * 1990-03-22 1992-07-31 Peugeot DEVICE FOR INTAKE AND DEHUILATION OF GASES IN AN INTERNAL COMBUSTION ENGINE AND ENGINE EQUIPPED WITH SUCH A DEVICE.
DE4403219A1 (en) * 1994-02-03 1995-08-10 Daimler Benz Ag Intake module for IC engine
US5575247A (en) * 1995-02-01 1996-11-19 Nippondenso Co., Ltd. Air intake device for an internal combustion engine
DE19507354B4 (en) * 1995-03-03 2009-12-10 Continental Automotive Gmbh Suction module for a gasoline engine
DE19626251A1 (en) * 1996-06-29 1998-01-08 Bosch Gmbh Robert Air duct system

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Publication number Priority date Publication date Assignee Title
DE202012009863U1 (en) * 2012-10-16 2014-01-20 Reinz-Dichtungs-Gmbh Valve cover and internal combustion engine

Also Published As

Publication number Publication date
DE69910269T2 (en) 2004-06-24
ES2200476T3 (en) 2004-03-01
EP0931926A1 (en) 1999-07-28
DE69910269D1 (en) 2003-09-18
FR2774130A1 (en) 1999-07-30
FR2774130B1 (en) 2000-03-10

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