FR2879262A1 - Air distributor for internal combustion engine of motor vehicle, has exhaust gas injecting tube at its plenum, including end fixed on wall of distributor by fixation system that limits heat transfer between tube and distributor - Google Patents

Air distributor for internal combustion engine of motor vehicle, has exhaust gas injecting tube at its plenum, including end fixed on wall of distributor by fixation system that limits heat transfer between tube and distributor Download PDF

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Publication number
FR2879262A1
FR2879262A1 FR0413212A FR0413212A FR2879262A1 FR 2879262 A1 FR2879262 A1 FR 2879262A1 FR 0413212 A FR0413212 A FR 0413212A FR 0413212 A FR0413212 A FR 0413212A FR 2879262 A1 FR2879262 A1 FR 2879262A1
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France
Prior art keywords
distributor
exhaust gas
tube
injection device
diffusion
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Granted
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FR0413212A
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French (fr)
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FR2879262B1 (en
Inventor
Stephane Guilain
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Renault SAS
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Renault SAS
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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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • 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
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The distributor has an exhaust gas injecting tube (6) placed at its plenum, and connected to an exhaust gas recirculation system. The tube has one end (6a) fixed on a wall of the distributor by a fixation system (8), and another closed end (6b) presenting a tapered shape. Wall of the tube is provided with injection orifices (7). The fixation system limits heat transfer between the tube and the distributor.

Description

2879262 12879262 1

REPARTITEUR D'AIR E:N MATIERE PLASTIQUE POUR MOTEUR A COMBUSTION INTERNE A RECIRCULATION DE GAZ D'ECHAPPEMENT L'invention concerne un répartiteur d'air en matière plastique destiné à être raccordé à un système de recirculation de gaz d'échappement d'un véhicule automobile.  The invention relates to a plastic air distributor intended to be connected to an exhaust gas recirculation system of an exhaust gas recirculation system. The invention concerns a plastic air distributor intended to be connected to an exhaust gas recirculation system of an exhaust gas recirculation system. motor vehicle.

Le mélange de gaz d'échappement à l'air d'admission du moteur permet de réduire la pollution émise par le moteur. Ce mélange d'air et de gaz d'échappement est généralement réalisé au moyen d'une buse placée en aval du répartiteur d'air. Les gaz d'échappement se mélangent alors à l'air, puis est distribué par le répartiteur dans les cylindres du moteur. La chaleur élevée des gaz d'échappement est toutefois susceptible d'entraîner la destruction d'un répartiteur réalisé en matériau plastique. Il est alors nécessaire de raccorder la buse d'injection de gaz d'échappement au répartiteur au moyen d'un dispositif isolant thermiquement la buse de la paroi du répartiteur. De tels dispositifs isolants sont décrits dans les documents FR-2 740 511 et US-6 173 701. Dans ces documents, l'ouverture de la buse débouche dans la paroi du répartiteur.  The mixture of exhaust gases with the intake air of the engine makes it possible to reduce the pollution emitted by the engine. This mixture of air and exhaust gas is generally achieved by means of a nozzle placed downstream of the air distributor. The exhaust gases are then mixed with air and then distributed by the distributor in the engine cylinders. The high heat of the exhaust gases, however, is likely to result in the destruction of a splitter made of plastic material. It is then necessary to connect the exhaust gas injection nozzle to the distributor by means of a thermally insulating device the nozzle of the wall of the distributor. Such insulating devices are described in documents FR-2,740,511 and US-6,173,701. In these documents, the opening of the nozzle opens into the wall of the distributor.

Toutefois, l'injection de gaz d'échappement est réalisée de manière ponctuelle, de sorte que ces gaz peuvent être "rampant", c'est-à- dire rester le long de la paroi du répartiteur en aval de la buse, si la vitesse d'injection est faible, ou bien peuvent venir frapper la paroi du répartiteur opposée à la buse, si la vitesse d'injection est forte. Dans les deux cas, des points chauds sont générés et peuvent entraîner la destruction du matériau plastique formant le répartiteur.  However, the injection of exhaust gas is carried out on an ad hoc basis, so that these gases can be "creeping", that is to say remain along the wall of the distributor downstream of the nozzle, if the injection speed is low, or can hit the wall of the distributor opposite to the nozzle, if the injection speed is high. In both cases, hot spots are generated and can cause the destruction of the plastic material forming the splitter.

La solution consiste alors à utiliser des répartiteurs en métaux, par exemple en aluminium, qui ne subissent pas de détérioration due à une trop forte chaleur. Ces matériaux augmentent toutefois le coût du répartiteur.  The solution is then to use splitter metal, for example aluminum, which do not undergo deterioration due to too much heat. These materials, however, increase the cost of the splitter.

L'invention vise à pallier ces inconvénients en proposant un répartiteur d'air en matière plastique destiné à être raccordé à un système d'injection de gaz d'échappement dont le dispositif d'injection est conçu afin d'éviter toute dégradation du répartiteur due à la chaleur.  The invention aims to overcome these drawbacks by providing a plastic air distributor intended to be connected to an exhaust gas injection system whose injection device is designed to prevent any degradation of the distributor due to in the heat.

A cet effet, l'objet de l'invention concerne un répartiteur d'air en matière plastique pour un moteur à combustion interne, comportant 2879262 2 une admission d'air et une pluralité de conduits de répartition d'air, le répartiteur étant destiné à être raccordé à un système de recirculation des gaz d'échappement, caractérisé en ce qu'il comprend un dispositif d'injection des gaz d'échappement dont une partie, raccordée au système de recirculation, est fixée sur la paroi du répartiteur au moyen d'un système de fixation l'isolant thermiquement de la paroi, et dont une autre partie pourvue d'orifices ou de zones de diffusion des gaz de recirculation s'étend à l'intérieur du répartiteur sensiblement au centre de ce dernier de manière à ce que les orifices ou zones de diffusion soient situés sensiblement en regard des conduits de répartition.  For this purpose, the object of the invention relates to a plastic air distributor for an internal combustion engine, comprising an air intake and a plurality of air distribution ducts, the distributor being intended to be connected to an exhaust gas recirculation system, characterized in that it comprises an exhaust gas injection device, a part of which, connected to the recirculation system, is fixed on the wall of the distributor by means of a securing system thermally insulating the wall, and another portion provided with orifices or recirculating gas diffusion zones extends inside the distributor substantially in the center of the latter so as to that the orifices or diffusion zones are located substantially opposite the distribution ducts.

Du fait du positionnement du dispositif d'injection au centre du répartiteur, l'injection des gaz d'échappement est réalisée à distance des parois du répartiteur, de sorte que les gaz d'échappement n'entrent pas en contact avec les parois et ne rampent pas le long de celles-ci.  Due to the positioning of the injection device at the center of the distributor, the injection of the exhaust gas is carried out away from the walls of the distributor, so that the exhaust gases do not come into contact with the walls and do not do not crawl along them.

Avantageusement, le dispositif d'injection présente une forme générale tubulaire creuse à l'intérieur de laquelle circule les gaz d'échappement, et dont l'extrémité libre située à l'intérieur du répartiteur est fermée.  Advantageously, the injection device has a generally tubular hollow shape within which circulates the exhaust gas, and whose free end located inside the tundish is closed.

De préférence, l'extrémité fermée du dispositif d'injection est située sensiblement en regard de l'admission d'air du répartiteur. Avantageusement, l'extrémité fermée présente alors une forme effilée optimisée pour limiter les pertes de charge au niveau de l'admission d'air. Le flux d'air est alors dévié par l'extrémité sans créer de pertes de charge importantes.  Preferably, the closed end of the injection device is located substantially opposite the air intake of the distributor. Advantageously, the closed end then has a tapered shape optimized to limit the pressure drops at the air intake. The air flow is then deflected by the end without creating significant pressure drops.

Dans un mode de réalisation particulier, la partie du dispositif d'injection située à l'intérieur du répartiteur est formée d'un tube à l'intérieur duquel circule le gaz d'échappement et sur la surface latérale duquel sont ménagés les orifices de diffusion.  In a particular embodiment, the part of the injection device located inside the tundish is formed of a tube inside which the exhaust gas circulates and on the lateral surface of which are provided the diffusion orifices. .

Avantageusement, l'orientation et/ou le diamètre des orifices de diffusion sont choisis afin d'optimiser la répartition des gaz d'échappement dans les conduits de répartition.  Advantageously, the orientation and / or the diameter of the diffusion orifices are chosen in order to optimize the distribution of the exhaust gases in the distribution ducts.

Dans un autre mode de réalisation particulier, la partie du dispositif d'injection située à l'intérieur du répartiteur est formée d'une grille de diffusion tubulaire à l'intérieur de laquelle circule le gaz d'échappement, et dont la paroi latérale présente une perméabilité aux gaz d'échappement variable de manière à former les zones de diffusion.  In another particular embodiment, the part of the injection device located inside the distributor is formed of a tubular diffusion grid inside which the exhaust gas circulates, and whose side wall has a variable exhaust gas permeability so as to form the diffusion zones.

2879262 3 Avantageusement, le dispositif d'injection est pourvu de plaques à proximité, ou autour, des zones de diffusion disposées de manière à diriger les gaz d'échappement sortant de ces zones en direction des conduits de répartition afin d'optimiser la répartition des gaz d'échappement dans les conduits de répartition.  Advantageously, the injection device is provided with plates in the vicinity, or around, diffusion zones arranged so as to direct the exhaust gases leaving these zones towards the distribution ducts in order to optimize the distribution of the exhaust gas in the distribution ducts.

L'invention est maintenant décrite en référence aux dessins annexés, non limitatifs, dans lesquels: - la figure 1 est une représentation en coupe d'un premier mode de réalisation d'un répartiteur selon l'invention; - la figure 2 est une représentation en coupe d'un deuxième mode de réalisation d'un répartiteur selon l'invention.  The invention is now described with reference to the accompanying non-limiting drawings, in which: - Figure 1 is a sectional representation of a first embodiment of a distributor according to the invention; - Figure 2 is a sectional representation of a second embodiment of a splitter according to the invention.

Sur les figures, les éléments identiques sont désignés par les mêmes références.  In the figures, the identical elements are designated by the same references.

La figure 1 représente un répartiteur 1 en matière plastique, comportant une admission d'air frais 2 et une pluralité de conduits de répartition 3 destinés à être reliés chacun à un cylindre du moteur. Le répartiteur est en outre relié à un système de recirculation des gaz d'échappement (EGR) dont seule la conduite d'arrivée 4 dans le répartiteur est représentée. L'admission d'air 2 et les conduits de répartition 3 débouchent dans le plénum 5 du répartiteur.  Figure 1 shows a distributor 1 of plastic material, comprising a fresh air intake 2 and a plurality of distribution ducts 3 intended to be each connected to a cylinder of the engine. The distributor is also connected to an exhaust gas recirculation system (EGR) of which only the inlet pipe 4 in the distributor is shown. The air intake 2 and the distribution ducts 3 open into the plenum 5 of the distributor.

Le répartiteur est également pourvu d'un dispositif d'injection de gaz d'échappement raccordé au système EGR par l'intermédiaire de la conduite 4.  The splitter is also provided with an exhaust gas injection device connected to the EGR system via line 4.

Dans l'exemple représenté figure 1, ce dispositif d'injection 6 est formé d'un tube dont la paroi latérale est pourvue d'orifices d'injection 7. Une extrémité 6a du tube est montée sur la paroi du répartiteur au moyen d'un système de fixation 8 l'isolant thermiquement de la paroi. Ce système peut par exemple être du type décrit dans les documents FR-2 740 511 et US-6 173 701. L'autre extrémité 6b du tube est fermée et présente une forme effilée.  In the example shown in FIG. 1, this injection device 6 is formed of a tube whose side wall is provided with injection orifices 7. One end 6a of the tube is mounted on the wall of the distributor by means of a fastening system 8 thermally insulating the wall. This system may for example be of the type described in documents FR-2,740,511 and US-6,173,701. The other end 6b of the tube is closed and has a tapered shape.

Le tube d'injection 6 est placé à l'intérieur du plénum 5 du répartiteur, de manière sensiblement centrale. De préférence, afin de limiter les pertes de charges, l'ad=mission d'air 2 et la fixation 8 du dispositif sont placées sur des parois opposées du répartiteur, la tête effilée 6b du dispositif étant située sensiblement en face de l'admission d'air 2.  The injection tube 6 is placed inside the plenum 5 of the distributor, substantially centrally. Preferably, in order to limit the pressure drops, the air intake 2 and the attachment 8 of the device are placed on opposite walls of the distributor, the tapered head 6b of the device being located substantially in front of the inlet of air 2.

2879262 4 La position, le diamètre et l'orientation des orifices d'injection 7 de la paroi latérale du dispositif sont choisies de manière à diriger les gaz d'échappement vers les conduits de répartition 3 tout en assurant une bonne répartition de ces gaz entre les différents conduits 3.  The position, the diameter and the orientation of the injection orifices 7 of the lateral wall of the device are chosen so as to direct the exhaust gases towards the distribution ducts 3 while ensuring a good distribution of these gases between the different ducts 3.

Dans l'exemple représenté sur la figure 2, le dispositif d'injection 16 est formé d'un tube dont la paroi est formée d'une grille de diffusion réalisée par exemple dans un matériau poreux ou tissé, par exemple du type des grilles utilisées pour les lampes de mineur, dont la perméabilité aux gaz d'échappement est maîtrisée. Une extrémité 16a du tube est fixée sur le répartiteur au moyen d'un système de fixation 8, son extrémité opposée 16b étant fermée et effilée.  In the example shown in FIG. 2, the injection device 16 is formed of a tube whose wall is formed of a diffusion grid made for example of a porous or woven material, for example of the type of grids used. for miner's lamps, whose permeability to exhaust gases is controlled. One end 16a of the tube is fixed to the distributor by means of a fastening system 8, its opposite end 16b being closed and tapered.

La grille est réalisée de manière à présenter des zones de perméabilité 17 aux gaz, formant des zones de diffusion, sensiblement en regard des conduits de répartition 3.  The grid is made to have zones of permeability 17 to the gases, forming diffusion zones, substantially opposite distribution ducts 3.

Pour une meilleure répartition, des plaques 18 peuvent être fixées au dispositif à proximité, ou autour, de ces zones de diffusion 17 de manière à diriger les gaz d'échappement sortant du tube en direction des conduits de répartition 3.  For a better distribution, plates 18 may be attached to the device near or around these diffusion zones 17 so as to direct the exhaust gases exiting the tube towards the distribution ducts 3.

Dans les deux exemples, le gaz d'échappement circule à l'intérieur du dispositif tubulaire, et sort par les orifices ou zones de diffusion en direction des conduits de répartition. Le dispositif est placé dans les deux cas sensiblement dans la même position centrale dans le plenum 5, en face de l'admission d'air 2. Le système de fixation isolant 8 limite la transmission thermique entre le dispositif et le répartiteur afin d'éviter la dégradation du matériau plastique formant ce dernier.  In both examples, the exhaust gas circulates inside the tubular device, and exits through the orifices or diffusion zones towards the distribution ducts. The device is placed in both cases substantially in the same central position in the plenum 5, in front of the air intake 2. The insulating fastening system 8 limits the heat transmission between the device and the distributor in order to avoid the degradation of the plastic material forming the latter.

Le dispositif d'injection des gaz d'échappement peut ainsi être réalisé de manière simple, sans engendrer de surcoût important et permet de conserver un matériau en plastique pour le répartiteur, de sorte que le coût de ce dernier est faible.  The exhaust gas injection device can thus be made in a simple manner, without generating significant additional cost and keeps a plastic material for the distributor, so that the cost of the latter is low.

De préférence, le dispositif d'injection 6, 16 est placé au coeur d'un plenum suffisamment volumineux de sorte que l'impact sur les pertes de charge sera faible, car la vitesse de l'air restera faible autour du dispositif. Ainsi, la perte de puissance due à l'ajout de ce dispositif d'injection sera quasiment nulle.  Preferably, the injection device 6, 16 is placed in the heart of a sufficiently large plenum so that the impact on the pressure drops will be low because the speed of air will remain low around the device. Thus, the power loss due to the addition of this injection device will be almost zero.

2879262 52879262 5

Claims (8)

REVENDICATIONS 1. Répartiteur d'air (1) en matière plastique pour un moteur à combustion interne, comportant une admission d'air (2) et une pluralité de conduits (3) de répartition d'air, le répartiteur étant destiné à être raccordé à un système de recirculation des gaz d'échappement, caractérisé en ce qu'il comprend un dispositif d'injection (6, 16) des gaz d'échappement dont une partie (6a, 16a), raccordée au système de recirculation, est fixée sur la paroi du répartiteur au moyen d'un système de fixation (8) l'isolant the:rmiquement de la paroi, et dont une autre partie, pourvue d'orifices (7) ou de zones (17) de diffusion des gaz de recirculation, s'étend à l'intérieur du répartiteur sensiblement au centre de ce dernier de manière à ce que les orifices ou zones de diffusion soient situés sensiblement en regard des conduits de répartition.  1. A plastic air distributor (1) for an internal combustion engine, comprising an air intake (2) and a plurality of air distribution ducts (3), the distributor being intended to be connected to an exhaust gas recirculation system, characterized in that it comprises an exhaust gas injection device (6, 16), a part of which (6a, 16a), connected to the recirculation system, is fixed on the wall of the distributor by means of a fastening system (8) isolating it thermally from the wall, and of which another part, provided with orifices (7) or zones (17) of diffusion of the recirculation gases extends inside the distributor substantially in the center of the latter so that the orifices or diffusion zones are located substantially opposite the distribution ducts. 2. Répartiteur selon la revendication 1, caractérisé en ce que le dispositif d'injection (6, 16) présente une forme générale tubulaire creuse à l'intérieur de laquelle circule les gaz d'échappement, et dont l'extrémité libre (6b, 16b) située à l'intérieur du répartiteur est fermée.  2. Dispatcher according to claim 1, characterized in that the injection device (6, 16) has a generally tubular hollow shape within which the exhaust gas flows, and whose free end (6b, 16b) inside the tundish is closed. 3. Répartiteur selon la revendication 2, caractérisé en ce que l'extrémité fermée (6b, 16b) du dispositif d'injection est située sensiblement en regard de l'admission d'air (2).  3. Dispatcher according to claim 2, characterized in that the closed end (6b, 16b) of the injection device is located substantially opposite the air intake (2). 4. Répartiteur selon la revendication 3, caractérisé en ce que l'extrémité fermée (6b, 16b) présente une forme effilée optimisée pour limiter les pertes de charge au niveau de l'admission d'air (2).  4. Distributor according to claim 3, characterized in that the closed end (6b, 16b) has a tapered shape optimized to limit the pressure drop at the air intake (2). 5. Répartiteur selon l'une des revendications 1 à 4, caractérisé en ce que la partie du dispositif d'injection (6) située à l'intérieur du répartiteur est formée d'un tube à l'intérieur duquel circule le gaz d'échappement et sur la surface latérale duquel sont ménagés les orifices de diffusion (7).  5. Distributor according to one of claims 1 to 4, characterized in that the portion of the injection device (6) located inside the tundish is formed of a tube inside which circulates the gas of exhaust and on the lateral surface of which are provided the diffusion orifices (7). 6. Répartiteur selon la revendication 5, caractérisé en ce que l'orientation et/ou le diamètre des orifices de diffusion (7) sont choisis afin d'optimiser la répartition des gaz d'échappement dans les conduits de répartition (3).  6. Dispatcher according to claim 5, characterized in that the orientation and / or the diameter of the diffusion orifices (7) are selected to optimize the distribution of exhaust gas in the distribution ducts (3). 7. Répartiteur selon l'une des revendications 1 à 4, caractérisé en ce que la partie du dispositif d'injection (16) située à l'intérieur du répartiteur est formée d'une grille de diffusion tubulaire à l'intérieur de laquelle circule le gaz d'échappement, et dont la paroi latérale présente 2879262 6 une perméabilité aux gaz d'échappement variable de manière à former les zones de diffusion (17).  7. Dispatcher according to one of claims 1 to 4, characterized in that the portion of the injection device (16) located inside the tundish is formed of a tubular diffusion grid inside which circulates the exhaust gas, and whose side wall has a variable exhaust gas permeability so as to form the diffusion zones (17). 8. Répartiteur selon la revendication 7, caractérisé en ce que le dispositif d'injection est pourvu de plaques (18) à proximité, ou autour, des zones de diffusion (17) disposées de manière à diriger les gaz d'échappement sortant de ces zones en direction des conduits de répartition (3).  8. Dispatcher according to claim 7, characterized in that the injection device is provided with plates (18) in the vicinity, or around, diffusion zones (17) arranged to direct the exhaust gas exiting these zones towards distribution ducts (3).
FR0413212A 2004-12-13 2004-12-13 PLASTIC AIR DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE WITH RECIRCULATION OF EXHAUST GASES. Active FR2879262B1 (en)

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EP2941558A4 (en) * 2013-01-04 2016-08-10 Scania Cv Ab Arrangement for recirculation of exhausts at an internal combustion engine
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FR2927957A1 (en) * 2008-02-21 2009-08-28 Mark Iv Systemes Moteurs Soc P Inlet distributor for air inlet system of internal combustion engine of motor vehicle, has injection device for injecting counter-current exhaust gas in flow entering opening, and nozzle tip terminated at its free end by flat end portion
US8677982B2 (en) * 2009-02-12 2014-03-25 Mann+Hummel Gmbh Exhaust gas inlet device
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US8534267B2 (en) 2009-02-12 2013-09-17 Behr Gmbh & Co. Kg Device for exhaust gas recirculation for a combustion engine
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WO2012130513A1 (en) * 2011-03-31 2012-10-04 Valeo Systemes Thermiques Device for the injection of recirculated exhaust gases, distribution box and supply module comprising said device
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