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EP1020632B1 - Intake manifold with connecting means to an exhaust recirculation circuit - Google Patents

Intake manifold with connecting means to an exhaust recirculation circuit Download PDF

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Publication number
EP1020632B1
EP1020632B1 EP00400089A EP00400089A EP1020632B1 EP 1020632 B1 EP1020632 B1 EP 1020632B1 EP 00400089 A EP00400089 A EP 00400089A EP 00400089 A EP00400089 A EP 00400089A EP 1020632 B1 EP1020632 B1 EP 1020632B1
Authority
EP
European Patent Office
Prior art keywords
tubular
venturi
intake manifold
air intake
fresh
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
EP00400089A
Other languages
German (de)
French (fr)
Other versions
EP1020632A1 (en
Inventor
Jean-Pierre Dudemaine
Pierre-Louis Vernhes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Renault Vehicules Industriels SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS, Renault Vehicules Industriels SA filed Critical Renault SAS
Publication of EP1020632A1 publication Critical patent/EP1020632A1/en
Application granted granted Critical
Publication of EP1020632B1 publication Critical patent/EP1020632B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—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
    • F02M35/10019—Means upstream of the fuel injection system, carburettor or plenum chamber
    • 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
    • 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
    • F02M35/104—Intake manifolds
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation

Definitions

  • the invention relates to an intake manifold.
  • the invention relates more particularly to a collector intake for fuel supply from a combustion engine motor vehicle, of the type which comprises a tubular conduit fresh air intake which opens into a block supplying cylinders with at least one outlet supply intended to be mounted opposite a duct corresponding supply practiced in a cylinder head engine, and the type in which a gas inlet tube recycled exhaust from an exhaust system of the vehicle, opens out substantially radially into the tubular air intake duct.
  • collectors intended to be assembled to a injection engine i.e. collectors which do not have no connection to any organ responsible for delivering fuel to the engine and which are only intended to supply the motor with oxidizer, especially in air
  • monobloc collectors in the general form of "air box" in which open at least one gas inlet tube recycled exhaust from an exhaust system of the vehicle, to improve engine performance.
  • air box in which open at least one gas inlet tube recycled exhaust from an exhaust system of the vehicle, to improve engine performance.
  • the tube exhaust gas inlet opens radially into a tubular intake manifold.
  • This type of collector is particularly advantageous compared to older intake systems, in which a simple intake manifold is coupled to an independent unit responsible for ensuring the mixing of air fresh from the atmosphere and exhaust gases recycled. These collectors are indeed much more compact.
  • the invention proposes a collector to ensure the constitution of a mixture homogeneous fresh air and recycled exhaust gases.
  • the invention provides a collector exhaust of the type previously described, characterized in that a Venturi tube is arranged coaxially in the tubular fresh air intake duct, the upstream end of the Venturi tube substantially coinciding with one end upstream of the tubular fresh air intake duct, and in this that a downstream end of the Venturi tube, or Venturi neck, is arranged downstream of the exhaust gas inlet tube to delimit between the Venturi pass and the interior wall of the tubular air intake duct a suction area exhaust gases.
  • FIG. 1 the whole of a collector intake 10 made in accordance with the invention.
  • the intake manifold 10 has a duct tubular 12 for fresh air intake which opens into a block 14, box-shaped, supplying the cylinders which has power outputs 16 intended to be mounted opposite a supply duct (not represented) correspondent practiced in a breech (not shown) of the engine.
  • the intake manifold 10 has four outlets 16 but this provision is not restrictive of the invention and it could include a higher number or lower depending on whether it is an engine with more or fewer cylinders or a multiple engine intake valves per cylinder.
  • the intake manifold 10 is conventionally made by molding, which advantageously allows obtain it at low manufacturing costs.
  • the intake manifold 10 includes an inlet pipe 18 for recycled exhaust gases which we see the dotted line in Figure 1 and that we can see on the perspective view of figure 2.
  • the inlet tube 18 of recycled exhaust gas is arranged radially by relative to the axial direction of the tubular conduit 12 fresh air intake to allow air to be mixed fresh from the atmosphere and exhaust gases coming from an exhaust circuit (not shown) of vehicle, to improve engine performance when operation.
  • the power supply 14 of the cylinders is substantially shaped parallelepiped and has on an upper face 20 a orifice 22 which coincides with a downstream end 24 of the duct axially extending fresh air intake tube 12 parallel to the longitudinal direction of the power supply 14.
  • a Venturi tube 26 is arranged coaxially in the tubular inlet duct 12 fresh air.
  • An upstream end 28 of the Venturi tube 26 substantially coincides with an upstream end 30 of the conduit tubular 12 for fresh air intake, and a downstream end 32 of the venturi tube 26, also called Venturi neck 32, is arranged downstream of the exhaust gas inlet tube 18 to delimit between the neck 32 of the Venturi and a wall 34 of the tubular conduit 12 an annular zone 33 for suctioning exhaust gas.
  • the duct tubular 12 for fresh air intake is, in one plane transverse P located axially at the neck 32 of the Venturi, shrunk to a diameter slightly larger than the diameter outside of the Venturi pass 32.
  • the difference in diameter between the neck 32 of the Venturi and the tubular duct 12 for air intake fresh is at this level of the order of a few millimeters.
  • the exhaust gas inlet tube 18 being located upstream of the exhaust gas suction zone 33, these are mixed almost homogeneously with the air fresh from the atmosphere before continuing their path in the tubular duct 12 for fresh air intake in direction of the admission block 14.
  • a room peripheral 36 is arranged coaxially to the Venturi tube 26 outside of it so as to define a buffer volume allowing relaxation at less partial exhaust gases recycled. This relaxation promotes uniform mixing when vacuumed in the suction zone 33 by the fresh air coming from the atmosphere flowing through the venturi tube creating a pressure difference to cause suction in the area 33.
  • the power supply comprises, in one of the lateral faces 54, the outlets power supply 16 previously described, which are arranged opposite the supply conduits 56 of a cylinder head 58 of the associated thermal engine.
  • At least one of the faces side of the supply pitcher 14 of the intake manifold 10, here the side face 54, has holes 60 intended allow the passage of fixing screws 62 to fix the intake manifold 10 to the cylinder head 58 of the engine.
  • a second side face 64 of the intake manifold 10 also includes 66 holes which are intended for allow the passage of screws 68 which also cross the face lateral 64 to allow the collector to be fixed supply 10 to the cylinder head 58 of the associated thermal engine.
  • Figure 2 illustrates the particular assembly of the tube of Venturi 26 between the upstream end 30 of the tubular conduit 12 and a flange 31 for connection to the vehicle radiator.
  • the end 30 of the tubular conduit 12 admission comprises a housing 70 in which is received the Venturi tube 26.
  • the housing 70 has a groove 71 which receives an annular flange 72 which extends radially to from the upstream end 28 of the Venturi tube (26).
  • the groove 71 of housing 70 is substantially of dimensions corresponding to the collar 72 so as to immobilize transversely and axially the Venturi tube 26 between the upstream end 30 of the tubular conduit 12 and a flange 31 of connection to a vehicle radiator.
  • the flange 31 for connection to the vehicle radiator is fixed on the end 30 of the tubular inlet duct 12, by example by means of screws (not shown) which allow to exert an axial clamping force on both sides transverse of the flange 72 of the Venturi tube 26, and of thus achieve a good seal.
  • This sealing can advantageously be completed by a flat annular seal (not shown) matching the shape of the collar 72 of the Venturi tube 26.
  • the intake manifold 10 as shown consists of three easy assembly parts, which guarantees its low manufacturing cost and perfect sealing both fresh air than exhaust gas.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Description

L'invention concerne un collecteur d'admission.The invention relates to an intake manifold.

L'invention concerne plus particulièrement un collecteur d'admission pour l'alimentation en comburant d'un moteur de véhicule automobile, du type qui comporte un conduit tubulaire d'admission d'air frais qui débouche dans un bloc d'alimentation des cylindres comportant au moins une sortie d'alimentation destinée à être montée en regard d'un conduit d'alimentation correspondant pratiqué dans une culasse du moteur, et du type dans lequel un tube d'arrivée de gaz d'échappement recyclés, provenant d'un circuit d'échappement du véhicule, débouche sensiblement radialement dans le conduit tubulaire d'admission d'air frais.The invention relates more particularly to a collector intake for fuel supply from a combustion engine motor vehicle, of the type which comprises a tubular conduit fresh air intake which opens into a block supplying cylinders with at least one outlet supply intended to be mounted opposite a duct corresponding supply practiced in a cylinder head engine, and the type in which a gas inlet tube recycled exhaust from an exhaust system of the vehicle, opens out substantially radially into the tubular air intake duct.

On connaít de nombreux types de collecteurs d'échappement.We know many types of collectors exhaust.

Parmi les collecteurs destinés à être assemblés à un moteur à injection, c'est à dire les collecteurs qui ne comportent aucun branchement sur un quelconque organe chargé de délivrer du carburant au moteur et qui sont uniquement destiné à assurer l'alimentation du moteur en comburant, notamment en air, on connaít de longue date des collecteurs monoblocs en forme générale de "boíte à air" dans lesquels débouchent au moins un tube d'arrivée de gaz d'échappement recyclés, provenant d'un circuit d'échappement du véhicule, pour améliorer le rendement du moteur. Conventionnellement, dans un tel type de collecteur, le tube d'arrivée de gaz d'échappement débouche radialement dans un conduit tubulaire d'admission du collecteur.Among the collectors intended to be assembled to a injection engine, i.e. collectors which do not have no connection to any organ responsible for delivering fuel to the engine and which are only intended to supply the motor with oxidizer, especially in air, we have known for a long time monobloc collectors in the general form of "air box" in which open at least one gas inlet tube recycled exhaust from an exhaust system of the vehicle, to improve engine performance. Conventionally, in such a type of collector, the tube exhaust gas inlet opens radially into a tubular intake manifold.

Ce type de collecteur est particulièrement avantageux en comparaison avec des systèmes d'admission plus anciens, dans lesquels un simple collecteur d'admission est accouplé à un boítier indépendant chargé d'assurer le mélange de l'air frais en provenance de l'atmosphère et les gaz d'échappement recyclés. Ces collecteurs sont en effet beaucoup plus compacts.This type of collector is particularly advantageous compared to older intake systems, in which a simple intake manifold is coupled to an independent unit responsible for ensuring the mixing of air fresh from the atmosphere and exhaust gases recycled. These collectors are indeed much more compact.

Toutefois, on a constaté que le mélange de l'air frais et des gaz d'échappement recyclés était peu homogène du fait de la position radiale du tube d'arrivée de gaz d'échappement. Ce type de collecteur ne permet pas d'assurer une homogénéité constante quel que soit le régime de rotation du moteur associé et l'arrivée de gaz d'échappement perturbe l'écoulement principal d'air frais.However, it has been found that the mixture of fresh air and recycled exhaust gas was inconsistent due to the radial position of the exhaust gas inlet tube. This type of collector does not ensure homogeneity constant whatever the engine speed associated and the arrival of exhaust gas disturbs the main flow of fresh air.

Pour remédier à ces inconvénients, l'invention propose un collecteur permettant d'assurer la constitution d'un mélange homogène d'air frais et de gaz d'échappement recyclés.To remedy these drawbacks, the invention proposes a collector to ensure the constitution of a mixture homogeneous fresh air and recycled exhaust gases.

Dans ce but, l'invention propose un collecteur d'échappement du type précédemment décrit, caractérisé en ce qu'un tube de Venturi est agencé coaxialement dans le conduit tubulaire d'admission d'air frais, l'extrémité amont du tube de Venturi coïncidant sensiblement avec une extrémité amont du conduit tubulaire d'admission d'air frais, et en ce qu'une extrémité aval du tube de Venturi, ou col du Venturi, est agencée en aval du tube d'arrivée des gaz d'échappement pour délimiter entre le col du Venturi et la paroi intérieure du conduit tubulaire d'admission d'air frais une zone d'aspiration des gaz d'échappement.To this end, the invention provides a collector exhaust of the type previously described, characterized in that a Venturi tube is arranged coaxially in the tubular fresh air intake duct, the upstream end of the Venturi tube substantially coinciding with one end upstream of the tubular fresh air intake duct, and in this that a downstream end of the Venturi tube, or Venturi neck, is arranged downstream of the exhaust gas inlet tube to delimit between the Venturi pass and the interior wall of the tubular air intake duct a suction area exhaust gases.

Selon d'autres caractéristiques de l'invention :

  • le conduit tubulaire d'admission d'air frais est rétréci radialement au niveau du col du Venturi pour délimiter axialement, entre l'extrémité amont du conduit tubulaire d'admission d'air frais et le col du Venturi, une chambre périphérique permettant le brassage des gaz d'échappement ;
  • la chambre périphérique comporte à l'intérieur un logement dans lequel est rapporté le tube de Venturi et qui permet la fixation par coincement du tube de venturi lors de son assemblage entre l'extrémité amont du conduit tubulaire et une bride de liaison à un radiateur du véhicule ;
  • le logement reçoit une collerette formée à l'extrémité amont du tube de Venturi ;
  • le bloc d'alimentation est sensiblement parallélépipédique, le conduit tubulaire d'admission d'air frais débouchant dans sa face supérieure, et ses sorties d'alimentation débouchant dans une de ses faces latérales ;
  • le bloc d'alimentation comporte dans au moins une de ses faces latérales des perçages réalisés à intervalles réguliers pour permettre sa fixation par vissage sur la culasse du moteur ;
  • le collecteur d'admission est réalisé par moulage.
According to other characteristics of the invention:
  • the tubular fresh air intake duct is narrowed radially at the level of the Venturi neck to delimit axially, between the upstream end of the tubular fresh air intake duct and the Venturi neck, a peripheral chamber allowing mixing exhaust gases;
  • the peripheral chamber has inside a housing in which the Venturi tube is attached and which allows the venturi tube to be fixed by wedging when it is assembled between the upstream end of the tubular conduit and a connection flange to a radiator of the vehicle;
  • the housing receives a flange formed at the upstream end of the Venturi tube;
  • the power supply unit is substantially parallelepipedal, the tubular fresh air intake duct opening into its upper face, and its supply outlets opening into one of its lateral faces;
  • the power supply unit comprises in at least one of its lateral faces bores made at regular intervals to allow its fixing by screwing on the cylinder head of the engine;
  • the intake manifold is produced by molding.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe selon son plan longitudinal médian d'un collecteur d'admission selon l'invention ;
  • la figure 2 est une vue en perspective de l'assemblage d'un tube de venturi dans un collecteur conforme à l'invention ; et
  • la figure 3 est une vue en coupe transversale dans un plan transversal médian 3-3 du collecteur d'admission.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • Figure 1 is a sectional view along its median longitudinal plane of an intake manifold according to the invention;
  • Figure 2 is a perspective view of the assembly of a venturi tube in a manifold according to the invention; and
  • Figure 3 is a cross-sectional view in a median transverse plane 3-3 of the intake manifold.

Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires. In the description which follows, figures of identical reference designates identical parts or having similar functions.

On voit sur la figure 1 l'ensemble d'un collecteur d'admission 10 réalisé conformément à l'invention. De manière connue, le collecteur d'admission 10 comporte un conduit tubulaire 12 d'admission d'air frais qui débouche dans un bloc 14, en forme de boíte, d'alimentation des cylindres qui comporte des sorties d'alimentation 16 destinées à être montées en regard d'un conduit d'alimentation (non représenté) correspondant pratiqué dans une culasse (non représentée) du moteur.We see in Figure 1 the whole of a collector intake 10 made in accordance with the invention. So known, the intake manifold 10 has a duct tubular 12 for fresh air intake which opens into a block 14, box-shaped, supplying the cylinders which has power outputs 16 intended to be mounted opposite a supply duct (not represented) correspondent practiced in a breech (not shown) of the engine.

Dans le mode de réalisation préféré de l'invention, le collecteur d'admission 10 comporte quatre sorties 16 d'alimentation, mais cette disposition n'est pas restrictive de l'invention et il pourrait en comporter un nombre supérieur ou inférieur selon qu'il s'agit d'un moteur comportant plus ou moins de cylindres ou d'un moteur comportant plusieurs soupapes d'admission par cylindre.In the preferred embodiment of the invention, the intake manifold 10 has four outlets 16 but this provision is not restrictive of the invention and it could include a higher number or lower depending on whether it is an engine with more or fewer cylinders or a multiple engine intake valves per cylinder.

Le collecteur d'admission 10 est réalisé conventionnellement par moulage, ce qui permet avantageusement de l'obtenir moyennant de faibles coûts de fabrication.The intake manifold 10 is conventionally made by molding, which advantageously allows obtain it at low manufacturing costs.

De manière connue, le collecteur d'admission 10 comporte un tube d'arrivée 18 de gaz d'échappement recyclés dont on voit la trace en pointillé à la figure 1 et que l'on peut voir sur la vue en perspective de la figure 2. Le tube d'arrivée 18 de gaz d'échappement recyclés est agencé radialement par rapport à la direction axiale du conduit tubulaire 12 d'admission d'air frais de façon à permettre un mélange de l'air frais en provenance de l'atmosphère et des gaz d'échappement en provenance d'un circuit d'échappement (non représenté) du véhicule, afin d'améliorer le rendement du moteur lors de son fonctionnement.In known manner, the intake manifold 10 includes an inlet pipe 18 for recycled exhaust gases which we see the dotted line in Figure 1 and that we can see on the perspective view of figure 2. The inlet tube 18 of recycled exhaust gas is arranged radially by relative to the axial direction of the tubular conduit 12 fresh air intake to allow air to be mixed fresh from the atmosphere and exhaust gases coming from an exhaust circuit (not shown) of vehicle, to improve engine performance when operation.

Dans le mode de réalisation préféré de l'invention, le bloc d'alimentation 14 des cylindres est de forme sensiblement parallélépipédique et comporte sur une face supérieure 20 un orifice 22 qui coïncide avec une extrémité aval 24 du conduit tubulaire 12 d'admission d'air frais qui s'étend axialement parallèlement à la direction longitudinale du bloc d'alimentation 14.In the preferred embodiment of the invention, the power supply 14 of the cylinders is substantially shaped parallelepiped and has on an upper face 20 a orifice 22 which coincides with a downstream end 24 of the duct axially extending fresh air intake tube 12 parallel to the longitudinal direction of the power supply 14.

Conformément à l'invention, un tube de Venturi 26 est agencé coaxialement dans le conduit tubulaire 12 d'admission d'air frais. Une extrémité amont 28 du tube de Venturi 26 coïncide sensiblement avec une extrémité amont 30 du conduit tubulaire 12 d'admission d'air frais, et une extrémité aval 32 du tube de venturi 26, aussi appelé col 32 du Venturi, est agencée en aval du tube 18 d'arrivée des gaz d'échappement pour délimiter entre le col 32 du Venturi et une paroi 34 du conduit tubulaire 12 une zone annulaire 33 d'aspiration des gaz d'échappement.According to the invention, a Venturi tube 26 is arranged coaxially in the tubular inlet duct 12 fresh air. An upstream end 28 of the Venturi tube 26 substantially coincides with an upstream end 30 of the conduit tubular 12 for fresh air intake, and a downstream end 32 of the venturi tube 26, also called Venturi neck 32, is arranged downstream of the exhaust gas inlet tube 18 to delimit between the neck 32 of the Venturi and a wall 34 of the tubular conduit 12 an annular zone 33 for suctioning exhaust gas.

Pour réaliser une aspiration des gaz d'échappements à l'aide de l'air en provenance de l'atmosphère, le conduit tubulaire 12 d'admission d'air frais est, dans un plan transversal P situé axialement au niveau du col 32 du Venturi, rétréci à un diamètre légèrement supérieur au diamètre extérieur du col 32 du Venturi. La différence de diamètre entre le col 32 du Venturi et le conduit tubulaire 12 d'admission d'air frais est à ce niveau de l'ordre de quelques millimètres. De la sorte, le tube 18 d'arrivée des gaz d'échappement étant situé en amont de la zone 33 d'aspiration des gaz d'échappement, ceux-ci sont mélangés de manière quasi-homogène avec l'air frais en provenance de l'atmosphère avant de poursuivre leur chemin dans le conduit 12 tubulaire d'admission d'air frais en direction du bloc d'admission 14.To perform a suction of exhaust gases to using air from the atmosphere, the duct tubular 12 for fresh air intake is, in one plane transverse P located axially at the neck 32 of the Venturi, shrunk to a diameter slightly larger than the diameter outside of the Venturi pass 32. The difference in diameter between the neck 32 of the Venturi and the tubular duct 12 for air intake fresh is at this level of the order of a few millimeters. Of the so, the exhaust gas inlet tube 18 being located upstream of the exhaust gas suction zone 33, these are mixed almost homogeneously with the air fresh from the atmosphere before continuing their path in the tubular duct 12 for fresh air intake in direction of the admission block 14.

Les gaz d'échappement sortent par volutes du circuit d'échappement du véhicule à une cadence correspondant au régime du moteur, et donc de façon non uniforme. Pour harmoniser la pression des gaz d'échappement, une chambre périphérique 36, visible à la figure 1, est agencée coaxialement au tube de Venturi 26 à l'extérieur de celui-ci de façon à délimiter un volume tampon permettant une détente au moins partielle des gaz d'échappement recyclés. Cette détente favorise leur mélange uniforme lorsque ceux-ci sont aspirés dans la zone d'aspiration 33 par l'air frais en provenance de l'atmosphère qui traverse le tube de venturi en créant une différence de pression pour provoquer l'aspiration dans la zone 33.The exhaust gases come out of the circuit vehicle exhaust at a rate corresponding to engine speed, and therefore not uniformly. For harmonize the exhaust gas pressure, a room peripheral 36, visible in FIG. 1, is arranged coaxially to the Venturi tube 26 outside of it so as to define a buffer volume allowing relaxation at less partial exhaust gases recycled. This relaxation promotes uniform mixing when vacuumed in the suction zone 33 by the fresh air coming from the atmosphere flowing through the venturi tube creating a pressure difference to cause suction in the area 33.

Comme l'illustre les figures 1 et 3, le bloc d'alimentation comporte, dans une des faces latérales 54, les sorties d'alimentation 16 précédemment décrites, lesquelles sont agencées en regard des conduits d'alimentation 56 d'une culasse 58 du moteur thermique associé.As shown in Figures 1 and 3, the power supply comprises, in one of the lateral faces 54, the outlets power supply 16 previously described, which are arranged opposite the supply conduits 56 of a cylinder head 58 of the associated thermal engine.

Conformément à l'invention, au moins une des faces latérales du broc d'alimentation 14 du collecteur d'admission 10, ici la face latérale 54, comporte des perçages 60 destinés à permettre le passage de vis de fixation 62 pour fixer le collecteur d'admission 10 à la culasse 58 du moteur.According to the invention, at least one of the faces side of the supply pitcher 14 of the intake manifold 10, here the side face 54, has holes 60 intended allow the passage of fixing screws 62 to fix the intake manifold 10 to the cylinder head 58 of the engine.

Dans un mode de réalisation préféré de l'invention, une seconde face latérale 64 du collecteur d'admission 10 comporte elle aussides perçages 66 qui sont destinés à permettre le passage de vis 68 qui traversent aussi la face latérale 64 pour permettre la fixation du collecteur d'alimentation 10 à la culasse 58 du moteur thermique associé.In a preferred embodiment of the invention, a second side face 64 of the intake manifold 10 also includes 66 holes which are intended for allow the passage of screws 68 which also cross the face lateral 64 to allow the collector to be fixed supply 10 to the cylinder head 58 of the associated thermal engine.

Enfin, la figure 2 illustre le montage particulier du tube de Venturi 26 entre l'extrémité amont 30 du conduit tubulaire 12 et une bride 31 de liaison au radiateur du véhicule.Finally, Figure 2 illustrates the particular assembly of the tube of Venturi 26 between the upstream end 30 of the tubular conduit 12 and a flange 31 for connection to the vehicle radiator.

Dans cette vue, l'extrémité 30 du conduit tubulaire 12 d'admission comporte un logement 70 dans lequel est reçu le tube 26 de Venturi. Le logement 70 comporte une gorge 71 qui reçoit une collerette annulaire 72 qui s'étend radialement à partir de l'extrémité amont 28 du tube de Venturi (26). La gorge 71 du logement 70 est sensiblement de dimensions correspondantes à la collerette 72 de façon à immobiliser transversalement et axialement le tube de Venturi 26 entre l'extrémité amont 30 du conduit tubulaire 12 et une bride 31 de liaison à un radiateur du véhicule.In this view, the end 30 of the tubular conduit 12 admission comprises a housing 70 in which is received the Venturi tube 26. The housing 70 has a groove 71 which receives an annular flange 72 which extends radially to from the upstream end 28 of the Venturi tube (26). The groove 71 of housing 70 is substantially of dimensions corresponding to the collar 72 so as to immobilize transversely and axially the Venturi tube 26 between the upstream end 30 of the tubular conduit 12 and a flange 31 of connection to a vehicle radiator.

La bride 31 de liaison au radiateur du véhicule est fixée sur l'extrémité 30 du conduit tubulaire 12 d'admission, par exemple au moyen de vis (non représentées) qui permettent d'exercer un effort de serrage axial sur les deux faces transversales de la collerette 72 du tube de Venturi 26, et de réaliser ainsi une bonne étanchéité.The flange 31 for connection to the vehicle radiator is fixed on the end 30 of the tubular inlet duct 12, by example by means of screws (not shown) which allow to exert an axial clamping force on both sides transverse of the flange 72 of the Venturi tube 26, and of thus achieve a good seal.

Cette étanchéité peut avantageusement être complétée par un joint annulaire plat (non représenté) épousant la forme de la collerette 72 du tube de Venturi 26.This sealing can advantageously be completed by a flat annular seal (not shown) matching the shape of the collar 72 of the Venturi tube 26.

Ainsi, le collecteur 10 d'admission tel que représenté, est constitué de trois pièces d'assemblage aisé, ce qui garantit son faible coût de fabrication et une étanchéité parfaite tant à l'air frais qu'au gaz d'échappement.Thus, the intake manifold 10 as shown, consists of three easy assembly parts, which guarantees its low manufacturing cost and perfect sealing both fresh air than exhaust gas.

Claims (7)

  1. Intake manifold (10) for supplying a motor vehicle engine with fuel, of the type comprising a tubular fresh-air intake duct (12) which opens into a block (14) for supplying the cylinders which comprises at least one supply outlet (16) intended to be installed opposite a corresponding supply duct (56) made in a cylinder head (58) of the engine, and of the type in which an inlet tube (18) for recycled exhaust gases from an exhaust circuit of the vehicle opens substantially radially into the tubular fresh-air intake duct (12), a venturi tube (26) being arranged coaxially in the tubular fresh-air intake duct (12), characterized in that the upstream end (28) of the venturi tube (26) substantially coincides with an upstream end (30) of the tubular fresh-air intake duct (12), and in that a downstream end (32) of the venturi tube (26), or venturi neck (32), is arranged downstream of the inlet tube (13) for the exhaust gases in order to delimit an exhaust-gas suction zone (33) between the venturi neck (32) and the inner wall (34) of the tubular fresh-air intake duct (12), such that the exhaust gases are sucked into the tubular intake duct (12) simultaneously with the flow of fresh air.
  2. Intake manifold (10) according to the preceding claim, characterized in that the tubular fresh-air intake duct (12) is narrowed radially in the region of the venturi neck (32) in order to delimit axially, between the upstream end (30) of the tubular fresh-air intake duct and the venturi neck (32), a peripheral chamber (36) which allows the exhaust gases to be mixed.
  3. Intake manifold (10) according to Claim 2, characterized in that the peripheral chamber (36) comprises on the inside a housing (70) in which the venturi tube (26) is attached and which allows the venturi tube (26) to be fastened by wedging during its assembly between the upstream end (30) of the tubular duct (12) and a collar (31) for connection to a radiator of the vehicle.
  4. Intake manifold (10) according to Claim 3, characterized in that the housing (70) comprises at least one annular groove (71) in which a flange (72) formed at the upstream end (28) of the venturi tube (26) is received.
  5. Intake manifold (10) according to any one of the preceding claims, characterized in that the supply block (14) is substantially parallelepipedal, the tubular fresh-air intake duct (12) opening into its upper face (20), and its supply outlets (16) opening into one of its lateral faces (54).
  6. Intake manifold (10) according to Claim 5, characterized in that the supply block (14) is provided in at least one of its lateral faces (54, 64) with bores (60, 66) made at regular intervals to allow it to be fastened by screwing onto the cylinder head (58) of the engine.
  7. Intake manifold (10) according to any one of the preceding claims, characterized in that it is produced by moulding.
EP00400089A 1999-01-15 2000-01-14 Intake manifold with connecting means to an exhaust recirculation circuit Expired - Lifetime EP1020632B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9900371 1999-01-15
FR9900371A FR2788565B1 (en) 1999-01-15 1999-01-15 INTAKE MANIFOLD COMPRISING MEANS OF CONNECTION TO AN EXHAUST GAS RECYCLING CIRCUIT

Publications (2)

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EP1020632A1 EP1020632A1 (en) 2000-07-19
EP1020632B1 true EP1020632B1 (en) 2004-06-23

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EP00400089A Expired - Lifetime EP1020632B1 (en) 1999-01-15 2000-01-14 Intake manifold with connecting means to an exhaust recirculation circuit

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EP (1) EP1020632B1 (en)
DE (1) DE60011683T2 (en)
ES (1) ES2223411T3 (en)
FR (1) FR2788565B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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US10316803B2 (en) 2017-09-25 2019-06-11 Woodward, Inc. Passive pumping for recirculating exhaust gas
US10995705B2 (en) 2019-02-07 2021-05-04 Woodward, Inc. Modular exhaust gas recirculation system
US11174809B1 (en) 2020-12-15 2021-11-16 Woodward, Inc. Controlling an internal combustion engine system
US11215132B1 (en) 2020-12-15 2022-01-04 Woodward, Inc. Controlling an internal combustion engine system
US11293382B2 (en) 2020-01-08 2022-04-05 Woodward, Inc. Passive pumping for recirculating exhaust gas

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE517251C2 (en) 2000-08-30 2002-05-14 Gustav Berggren Component for controlling exhaust gas reflux
SE522310C2 (en) * 2001-03-02 2004-02-03 Volvo Lastvagnar Ab Apparatus and method for supplying recycled exhaust gases
US6439212B1 (en) 2001-12-19 2002-08-27 Caterpillar Inc. Bypass venturi assembly and elbow with turning vane for an exhaust gas recirculation system
US6640542B2 (en) 2001-12-20 2003-11-04 Caterpillar Inc Bypass venturi assembly with single shaft actuator for an exhaust gas recirculation system
US6659092B2 (en) 2001-12-20 2003-12-09 Caterpillar Inc Bypass assembly with annular bypass venturi for an exhaust gas recirculation system
US7543600B2 (en) 2003-07-07 2009-06-09 Varivent Innovations Ab Arrangement for mixing a first and second gas flow with downstream control
FR2861137B1 (en) * 2003-10-16 2008-03-07 Renault Sa DEVICE AND METHOD FOR PREPARING A HOMOGENEOUS MIXTURE OF GAS FLUIDS FOR ENGINE
DE102011056896A1 (en) * 2011-12-22 2013-06-27 Leibniz-Institut Für Neue Materialien Gemeinnützige Gmbh Method of making and using graphene on polycrystalline silicon carbide
DE102012217285A1 (en) * 2012-09-25 2014-06-12 Bayerische Motoren Werke Aktiengesellschaft internal combustion engine
ITRM20130103A1 (en) * 2013-02-22 2014-08-23 Piaggio & C Spa AIR INTAKE AND RECIRCULATION SYSTEM FOR EXHAUST GASES FOR A DIESEL ENGINE
CN104047780B (en) * 2014-06-25 2017-02-22 中国第一汽车股份有限公司无锡油泵油嘴研究所 designing method of high supercharged engine intake port
CN106015121A (en) * 2016-06-21 2016-10-12 武汉理工大学 Air jet-type ventilator
AT524259A1 (en) * 2021-06-17 2022-04-15 Avl List Gmbh INLET COLLECTOR FOR AN ENGINE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662722A (en) * 1970-04-22 1972-05-16 Chrysler Corp Cool exhaust recycling
DE69612420T2 (en) * 1995-03-14 2001-07-26 Cummins Engine Co., Inc. Turbo-charged diesel engine
IT1291509B1 (en) * 1997-02-11 1999-01-11 Fiat Ricerche DIESEL CYCLE COMBUSTION ENGINE, WITH EXHAUST GAS RECIRCULATION, EQUIPPED WITH A RECIRCULATING GAS MIXER.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10316803B2 (en) 2017-09-25 2019-06-11 Woodward, Inc. Passive pumping for recirculating exhaust gas
US10634099B2 (en) 2017-09-25 2020-04-28 Woodward, Inc. Passive pumping for recirculating exhaust gas
US10995705B2 (en) 2019-02-07 2021-05-04 Woodward, Inc. Modular exhaust gas recirculation system
US11293382B2 (en) 2020-01-08 2022-04-05 Woodward, Inc. Passive pumping for recirculating exhaust gas
US11174809B1 (en) 2020-12-15 2021-11-16 Woodward, Inc. Controlling an internal combustion engine system
US11215132B1 (en) 2020-12-15 2022-01-04 Woodward, Inc. Controlling an internal combustion engine system

Also Published As

Publication number Publication date
FR2788565A1 (en) 2000-07-21
EP1020632A1 (en) 2000-07-19
DE60011683D1 (en) 2004-07-29
DE60011683T2 (en) 2005-06-30
FR2788565B1 (en) 2001-02-09
ES2223411T3 (en) 2005-03-01

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