EP2638275A1 - Gas distribution manifold and corresponding gas intake module - Google Patents

Gas distribution manifold and corresponding gas intake module

Info

Publication number
EP2638275A1
EP2638275A1 EP11778930.5A EP11778930A EP2638275A1 EP 2638275 A1 EP2638275 A1 EP 2638275A1 EP 11778930 A EP11778930 A EP 11778930A EP 2638275 A1 EP2638275 A1 EP 2638275A1
Authority
EP
European Patent Office
Prior art keywords
intake
injection
gas
manifold
flow
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.)
Withdrawn
Application number
EP11778930.5A
Other languages
German (de)
French (fr)
Inventor
Carlos Martins
José BORGES-ALEJO
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP2638275A1 publication Critical patent/EP2638275A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70—Bearing or lubricating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • 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
    • 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
    • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a gas distribution manifold in intake ducts of a motor vehicle engine. It also relates to a gas intake module comprising such a collector.
  • a motor vehicle engine has a combustion chamber, generally formed by a plurality of cylinders, in which a mixture of oxidant and fuel is burned to generate the engine work.
  • the gases admitted into the combustion chamber are called intake gases.
  • these inlet gases must be cooled before being introduced into the combustion chamber; this function is fulfilled by a heat exchanger, which is a cooler.
  • a current trend is to bring the heat exchanger closer to the engine.
  • the patent application FR2908833 proposes for this purpose a gas intake device, in which the heat exchanger and the gas intake manifold are integrated in a unitary module intended to be fixed on the cylinder head of the engine.
  • this device is especially suitable for engines having intake ducts distributed in a single line and is less suitable for engines having intake ducts distributed in several lines.
  • the present invention aims to remedy this disadvantage.
  • the invention firstly relates to a gas distribution manifold in intake ducts of a motor vehicle engine, said intake ducts being distributed in at least two remote groups, each driving a group supplying the same engine cylinder as a conduit of the other group, said manifold comprising:
  • a collector housing adapted to be traversed by a flow of intake gas
  • an injection duct for injecting a flow of recirculated exhaust gas into the intake gas flow
  • the casing being adapted to direct the flow of intake gas and the stream of recirculated exhaust gas to the intake ducts of the engine and the injection duct being disposed inside the collector housing so as to be able to be positioned between the two groups of intake ducts.
  • the particular arrangement of the injection conduit, according to the invention allows a good distribution of gases in the engine cylinders even when there are significant distances between the intake ducts of the same cylinder.
  • the collector housing may comprise an inlet face of the intake gas flow and an outlet face intended to face the engine.
  • the said inlet face is intended to be subject to a heat exchanger and / or said outlet face is intended to be secured to the engine, including its cylinder head.
  • the manifold comprises intake ports intended to be connected to the intake ducts.
  • the intake ports are aligned in two distinct groups and the injection pipe is positioned in an intermediate position, particularly central, with respect to the two groups of intake ports.
  • the intermediate and / or central positioning of the injection duct with respect to the two groups of intake ports makes it possible to balance the distribution of the recirculated exhaust gases in the cylinders.
  • the collector may include, especially at the outlet side of the housing, intake pipes for insertion into the engine intake ducts.
  • the intake ports are provided at said pipes.
  • the injection duct comes from the outlet face of the collector housing.
  • the injection duct is of rectilinear shape.
  • the injection conduit comprises a plurality of injection orifices oriented towards the orifices and / or intake pipes. This allows a better distribution and a good mix of gases.
  • the injection orifices are aligned along the injection conduit on at least two lines.
  • the injection ports are aligned along the injection line on two lines for injecting the recirculated exhaust gas in two opposite directions, towards each group of intake ducts.
  • the injection duct having two axial ends, said injection duct comprises an inlet port of the recirculated exhaust gas flow located between the two ends.
  • the injection conduit is configured to deflect the intake gas flow.
  • the outer profile of the injection duct thus has a deflector role to properly direct the intake gas into the orifices and / or intake pipes.
  • the present invention also proposes a gas intake module in a motor vehicle engine, comprising a heat exchanger and a gas distribution manifold according to the invention.
  • FIG. 1 shows an exploded perspective view of an intake module, according to one embodiment of the invention
  • FIG. 2 shows a sectional view of the intake module of Figure 1, the cutting plane being orthogonal to the outlet face of the collector housing;
  • FIG. 3 shows a sectional view of a gas distribution manifold of the module of Figure 1, the section plane being parallel to the outlet face of the collector housing;
  • FIG. 4 represents a perspective view of the gas distribution manifold of the module of FIG. 1.
  • FIG. 1 represents an intake module 2. It allows the mixing of a flow of intake gas, generally fresh air, compressed or not and / or cooled or not, and recirculated exhaust gas, cooled or not, with a view to their admission to a cylinder head of a motor vehicle engine, for example of the four-cylinder type, each cylinder comprising two intake valves.
  • intake gas generally fresh air, compressed or not and / or cooled or not
  • exhaust gas cooled or not
  • the intake valves of the cylinders are associated with intake ducts, at the cylinder head, distributed in two groups separated by four ducts each.
  • the intake module 2 comprises an inlet box 4 of an intake gas flow in a heat exchanger 6.
  • the heat exchanger 6 is arranged to exchange heat with the flow of intake gas flowing in the exchanger.
  • the heat exchanger 6 may, for example, be a charge air cooler adapted to cool the engine intake gas.
  • the heat exchanger 6 comprises, for example, a heat exchange beam formed by a plurality of exchange elements stacked between two end plates, a bottom plate and a top plate.
  • the spaces between the beam exchange elements form channels for driving a flow of gas to be cooled, here the intake gases.
  • the beam exchange elements are hollow and conduct a coolant, intended to exchange heat with the flow of gas to be cooled circulating in the fluid conduit channels and thus cool.
  • the exchanger is equipped with inlet / outlet pipes allowing the coolant to enter and exit the beam.
  • the heat exchanger 6 opens into a distribution manifold 8 intended to be connected to the cylinder head of the engine.
  • the distribution manifold 8 allows a distributed inlet, in the cylinder head, of the gas stream coming from the heat exchanger 6.
  • the distribution manifold 8 comprises a collector housing 10 guiding, here via eight pipes, the intake gases to the engine cylinder head, through two groups of four separate intake ports 12 each intended for to be connected to the intake ducts of the cylinder head.
  • Some of the intake ports 12 are provided at projections 13, intended to be inserted inside the intake ducts. These are in particular the intake ports 12 of a first group, the lower one in the figures. These projections 13 make it possible to ensure a radial seal with the cylinder head while that the seal will be of axial type at the level of the other group of intake ports 12.
  • the distribution manifold 8 also comprises an injection conduit 14 for injecting a flow of recirculated exhaust gas into the intake gas flow upstream of the cylinder head.
  • the injection conduit 14 is disposed inside the housing 10 so as to be positioned between the two groups of intake ports 12.
  • the injection duct 14 comprises injection means in the form of a plurality of injection orifices 16 oriented in the direction of the intake orifices 12.
  • the distribution manifold 8 also comprises an intake inlet 18 of a stream of recirculated exhaust gas from an exhaust line of the engine.
  • the intake module 2 is in the form of a unitary module integrating the inlet box 4, the heat exchanger 6 and the distribution manifold 8 subject to each other.
  • This module is thus intended to be fixed in one piece on the cylinder head of the engine.
  • the heat exchanger 6 forms the structural element of the intake module 2, that is to say that it acts as a structural element carrying the module of admission.
  • an element preferably metal, has mechanical characteristics enabling it to support the other elements of the module 2, which are attached to it, before fixing the module on the engine.
  • the exchanger comprises, for example, a housing, open to the inlet box 4 and the distribution manifold 8, inside which the heat exchange bundle is placed.
  • the input box 4 and / or the collector 8 are subject, in particular, to said housing.
  • the inlet / outlet pipes for the heat transfer fluid can also be fixed to said housing.
  • the collector housing 10 comprises an inlet face 20 of the inlet gas flow into which the exit face of the heat exchange bundle of the exchanger 6 opens and an outlet face 22 intended to be connected to the inlet side of the cylinder head gases.
  • the injection duct 14 comes from the outlet face 22 of the collector housing 10.
  • the positioning of the injection conduit 14 between the two groups of intake ducts makes it a deflector of the intake gas flow to direct it to the intake ducts.
  • this structure of the distribution manifold 8 of the invention therefore does not require to provide a separate deflector.
  • FIG. 3 illustrates the structure of the injection conduit 14 in more detail.
  • the injection conduit 14 is rectilinear. Preferably, it is positioned in a central / median position relative to the two groups of intake ports 12.
  • Injection ports 16, whose number and dimensions are not limited, are aligned along the injection conduit 14 on two lines for injecting the recirculated exhaust gas towards each group of intake ducts.
  • 16 are distributed over more than two lines, for example spiral or staggered, etc.
  • the injection conduit 14 comprises an inlet orifice 24 corresponding to the intake inlet 18 of the recirculated exhaust gas stream.
  • the inlet orifice 24 is located between the two axial ends 26 and 28 of the injection duct 14.
  • it is connected to the injection duct 14 at a distance from one of the ends of said duct substantially equal to one quarter of the length of the injection conduit 14.
  • the solid arrows of FIG. 4 illustrate the circulation of the recirculated gases from the intake inlet 18 to the injection conduit 14 via the inlet orifice 24. Then, the gases are injected from the orifices of injection 16 to the inlet ports 12, for example in a direction substantially orthogonal to the flow of intake gas, which promotes mixing.

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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)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

Manifold (8) for distributing gases to the inlet ducts of a motor vehicle combustion engine, said inlet ducts being distributed in at least two distant groups, each duct of one group feeding one and the same cylinder of the engine as a duct of the other group, said manifold (8) comprising: - a manifold casing (10) through which a flow of inlet gas can pass; an injection duct (14) for injecting a flow of recirculated exhaust gas into the flow of inlet gas, the casing being capable of directing the flow of inlet gas and the flow of recirculated exhaust gas toward the inlet ducts of the engine and the injection duct (14) being positioned inside the manifold casing (10) so as to be able to be positioned between the two groups of inlet ducts.

Description

Collecteur de répartition de gaz et module d'admission de gaz correspondant  Gas distribution manifold and corresponding gas inlet module
La présente invention concerne un collecteur de répartition de gaz dans des conduits d'admission d'un moteur thermique de véhicule automobile. Elle concerne également un module d'admission de gaz comprenant un tel collecteur. The present invention relates to a gas distribution manifold in intake ducts of a motor vehicle engine. It also relates to a gas intake module comprising such a collector.
Un moteur thermique de véhicule automobile comporte une chambre de combustion, généralement formée par une pluralité de cylindres, dans laquelle un mélange de comburant et de carburant est brûlé pour générer le travail du moteur. Les gaz admis dans la chambre de combustion sont dénommés gaz d'admission.  A motor vehicle engine has a combustion chamber, generally formed by a plurality of cylinders, in which a mixture of oxidant and fuel is burned to generate the engine work. The gases admitted into the combustion chamber are called intake gases.
Dans certains cas, ces gaz d'admission doivent être refroidis avant d'être introduits dans la chambre de combustion ; cette fonction est remplie par un échangeur de chaleur, qui est un refroidisseur.  In some cases, these inlet gases must be cooled before being introduced into the combustion chamber; this function is fulfilled by a heat exchanger, which is a cooler.
Afin de réduire les émissions polluantes, il est également connu d'introduire dans le flux de gaz d'admission des gaz d'échappement dits "recirculés". Il s'agit de gaz d'échappement prélevés en aval de la chambre de combustion pour être réacheminés (recirculés) vers le flux de gaz d'admission, en amont de la chambre de combustion. Pour cela, on a déjà proposé d'introduire les gaz d'échappement recirculés via un ou plusieurs points d'introduction ménagés dans une canalisation d'admission des gaz s'étendant entre le refroidisseur des gaz d'admission et le moteur, afin que les gaz d'échappement recirculés se mélangent avec les gaz d'admission.  In order to reduce the pollutant emissions, it is also known to introduce into the flow of intake gas so-called "recirculated" exhaust gases. This is exhaust gas taken downstream of the combustion chamber to be rerouted (recirculated) to the intake gas flow, upstream of the combustion chamber. For this, it has already been proposed to introduce the recirculated exhaust gas via one or more points of introduction formed in a gas intake pipe extending between the intake gas cooler and the engine, so that the recirculated exhaust gases mix with the inlet gases.
Une tendance actuelle vise à rapprocher au maximum l'échangeur de chaleur du moteur.  A current trend is to bring the heat exchanger closer to the engine.
La demande de brevet FR2908833 propose à cet effet un dispositif d'admission de gaz, dans lequel l'échangeur de chaleur et le collecteur d'admission de gaz sont intégrés dans un module unitaire destiné à être fixé sur la culasse du moteur.  The patent application FR2908833 proposes for this purpose a gas intake device, in which the heat exchanger and the gas intake manifold are integrated in a unitary module intended to be fixed on the cylinder head of the engine.
Cependant, ce dispositif est surtout adapté aux moteurs ayant des conduits d'admission répartis en une seule ligne et l'est moins aux moteurs ayant des conduits d'admission répartis en plusieurs lignes.  However, this device is especially suitable for engines having intake ducts distributed in a single line and is less suitable for engines having intake ducts distributed in several lines.
La présente invention vise à remédier à cet inconvénient.  The present invention aims to remedy this disadvantage.
A cet effet, l'invention concerne tout d'abord un collecteur de répartition de gaz dans des conduits d'admission d'un moteur thermique de véhicule automobile, lesdits conduits d'admission étant répartis selon au moins deux groupes distants, chaque conduit d'un groupe alimentant un même cylindre du moteur qu'un conduit de l'autre groupe, ledit collecteur comprenant : For this purpose, the invention firstly relates to a gas distribution manifold in intake ducts of a motor vehicle engine, said intake ducts being distributed in at least two remote groups, each driving a group supplying the same engine cylinder as a conduit of the other group, said manifold comprising:
- un carter de collecteur apte à être traversé par un flux de gaz d'admission;  - A collector housing adapted to be traversed by a flow of intake gas;
- un conduit d'injection pour injecter un flux de gaz d'échappement recirculés dans le flux de gaz d'admission,  an injection duct for injecting a flow of recirculated exhaust gas into the intake gas flow,
le carter étant apte à diriger le flux de gaz d'admission et le flux de gaz d'échappement recirculés vers les conduits d'admission du moteur et le conduit d'injection étant disposé à l'intérieur du carter de collecteur de façon à pouvoir être positionné entre les deux groupes de conduits d'admission.  the casing being adapted to direct the flow of intake gas and the stream of recirculated exhaust gas to the intake ducts of the engine and the injection duct being disposed inside the collector housing so as to be able to be positioned between the two groups of intake ducts.
La disposition particulière du conduit d'injection, selon l'invention, permet une bonne répartition des gaz dans les cylindres du moteur même lorsqu'il y a des distances importantes entre les conduits d'admission d'un même cylindre.  The particular arrangement of the injection conduit, according to the invention, allows a good distribution of gases in the engine cylinders even when there are significant distances between the intake ducts of the same cylinder.
Le carter de collecteur pourra comprendre une face d'entrée du flux de gaz d'admission et une face de sortie destinée à se trouver en regard du moteur. La dite face d'entrée est destinée à être assujettie à un échangeur de chaleur et/ou ladite face de sortie est destinée à être assujettie au moteur, notamment sa culasse.  The collector housing may comprise an inlet face of the intake gas flow and an outlet face intended to face the engine. The said inlet face is intended to be subject to a heat exchanger and / or said outlet face is intended to be secured to the engine, including its cylinder head.
Avantageusement, le collecteur comprend des orifices d'admission destinés à être raccordés aux conduits d'admission.  Advantageously, the manifold comprises intake ports intended to be connected to the intake ducts.
De préférence, les orifices d'admission sont alignés en deux groupes distincts et le conduit d'injection est positionné dans une position intermédiaire, notamment centrale, par rapport aux deux groupes d'orifices d'admission.  Preferably, the intake ports are aligned in two distinct groups and the injection pipe is positioned in an intermediate position, particularly central, with respect to the two groups of intake ports.
Le positionnement intermédiaire et/ou central du conduit d'injection par rapport aux deux groupes d'orifices d'admission permet d'équilibrer la répartition des gaz d'échappement recirculés dans les cylindres.  The intermediate and / or central positioning of the injection duct with respect to the two groups of intake ports makes it possible to balance the distribution of the recirculated exhaust gases in the cylinders.
Le collecteur pourra comprendre, notamment au niveau de la face de sortie du carter, des pipes d'admission destinées à être insérées dans les conduits d'admission du moteur. Les orifices d'admission sont prévus au niveau desdites pipes.  The collector may include, especially at the outlet side of the housing, intake pipes for insertion into the engine intake ducts. The intake ports are provided at said pipes.
Avantageusement, le conduit d'injection est issu de la face de sortie du carter de collecteur.  Advantageously, the injection duct comes from the outlet face of the collector housing.
Encore avantageusement, le conduit d'injection est de forme rectiligne. Avantageusement, le conduit d'injection comprend une pluralité d'orifices d'injection orientés en direction des orifices et/ou pipes d'admission. Cela permet une meilleure répartition et un bon mélange des gaz. Still advantageously, the injection duct is of rectilinear shape. Advantageously, the injection conduit comprises a plurality of injection orifices oriented towards the orifices and / or intake pipes. This allows a better distribution and a good mix of gases.
Avantageusement, les orifices d'injection sont alignés le long du conduit d'injection sur au moins deux lignes.  Advantageously, the injection orifices are aligned along the injection conduit on at least two lines.
De préférence, les orifices d'injection sont alignés le long du conduit d'injection sur deux lignes pour injecter les gaz d'échappement recirculés selon deux directions opposées, en direction de chaque groupe de conduits d'admission.  Preferably, the injection ports are aligned along the injection line on two lines for injecting the recirculated exhaust gas in two opposite directions, towards each group of intake ducts.
Avantageusement, le conduit d'injection possédant deux extrémités axiales, ledit conduit d'injection comprend un orifice d'entrée du flux de gaz d'échappement recirculés situé entre les deux extrémités.  Advantageously, the injection duct having two axial ends, said injection duct comprises an inlet port of the recirculated exhaust gas flow located between the two ends.
Encore avantageusement, le conduit d'injection est configuré de façon à défléchir le flux de gaz d'admission. Le profil extérieur du conduit d'injection a ainsi un rôle de déflecteur pour bien diriger les gaz d'admission dans les orifices et/ou pipes d'admission.  Still advantageously, the injection conduit is configured to deflect the intake gas flow. The outer profile of the injection duct thus has a deflector role to properly direct the intake gas into the orifices and / or intake pipes.
La présente invention propose également un module d'admission de gaz dans un moteur thermique de véhicule automobile, comprenant un échangeur de chaleur et un collecteur de répartition des gaz selon l'invention.  The present invention also proposes a gas intake module in a motor vehicle engine, comprising a heat exchanger and a gas distribution manifold according to the invention.
Des modes de réalisation de l'invention vont maintenant être décrits de façon plus précise, mais non limitative, en regard des dessins annexés sur lesquels :  Embodiments of the invention will now be described more specifically, but not limitatively, with reference to the accompanying drawings in which:
- la figure 1 représente une vue en perspective éclatée d'un module d'admission, selon un mode de réalisation de l'invention ;  - Figure 1 shows an exploded perspective view of an intake module, according to one embodiment of the invention;
- la figure 2 représente une vue en coupe du module d'admission de la figure 1 , le plan de coupe étant orthogonal à la face de sortie du carter du collecteur ;  - Figure 2 shows a sectional view of the intake module of Figure 1, the cutting plane being orthogonal to the outlet face of the collector housing;
- la figure 3 représente une vue en coupe d'un collecteur de répartition de gaz du module de la figure 1 , le plan de coupe étant parallèle à la face de sortie du carter du collecteur ; et  - Figure 3 shows a sectional view of a gas distribution manifold of the module of Figure 1, the section plane being parallel to the outlet face of the collector housing; and
- la figure 4 représente une vue en perspective du collecteur de répartition de gaz du module de la figure 1 .  FIG. 4 represents a perspective view of the gas distribution manifold of the module of FIG. 1.
La figure 1 représente un module d'admission 2. Il permet le mélange d'un flux de gaz d'admission, généralement de l'air frais, comprimé ou non et/ou refroidi ou non, et de gaz d'échappement recirculés, refroidis ou non, en vue de leur admission dans une culasse d'un moteur thermique de véhicule automobile, par exemple de type à quatre cylindres, chaque cylindre comprenant deux soupapes d'admission. FIG. 1 represents an intake module 2. It allows the mixing of a flow of intake gas, generally fresh air, compressed or not and / or cooled or not, and recirculated exhaust gas, cooled or not, with a view to their admission to a cylinder head of a motor vehicle engine, for example of the four-cylinder type, each cylinder comprising two intake valves.
Les soupapes d'admission des cylindres sont associées à des conduits d'admission, au niveau de la culasse, répartis selon deux groupes distants de quatre conduits chacun.  The intake valves of the cylinders are associated with intake ducts, at the cylinder head, distributed in two groups separated by four ducts each.
Le module d'admission 2 comprend une boîte d'entrée 4 d'un flux de gaz d'admission dans un échangeur de chaleur 6.  The intake module 2 comprises an inlet box 4 of an intake gas flow in a heat exchanger 6.
L'échangeur de chaleur 6 est agencé pour échanger de la chaleur avec le flux de gaz d'admission circulant dans l'échangeur. L'échangeur de chaleur 6 pourra, par exemple, être un refroidisseur d'air de suralimentation apte à refroidir les gaz d'admission du moteur.  The heat exchanger 6 is arranged to exchange heat with the flow of intake gas flowing in the exchanger. The heat exchanger 6 may, for example, be a charge air cooler adapted to cool the engine intake gas.
L'échangeur de chaleur 6 comporte, par exemple, un faisceau d'échange de chaleur formé par une pluralité d'éléments d'échange empilés entre deux plaques d'extrémités, soit une plaque de fond et une plaque de dessus. Les espaces entre les éléments d'échange du faisceau forment des canaux de conduite d'un flux de gaz à refroidir, ici les gaz d'admission. Les éléments d'échange du faisceau sont creux et conduisent un fluide caloporteur, destiné à échanger de la chaleur avec le flux de gaz à refroidir circulant dans les canaux de conduite de fluide et ainsi le refroidir. L'échangeur est muni de tubulures d'entrée/sortie permettant au fluide caloporteur de pénétrer et de sortir du faisceau.  The heat exchanger 6 comprises, for example, a heat exchange beam formed by a plurality of exchange elements stacked between two end plates, a bottom plate and a top plate. The spaces between the beam exchange elements form channels for driving a flow of gas to be cooled, here the intake gases. The beam exchange elements are hollow and conduct a coolant, intended to exchange heat with the flow of gas to be cooled circulating in the fluid conduit channels and thus cool. The exchanger is equipped with inlet / outlet pipes allowing the coolant to enter and exit the beam.
L'échangeur de chaleur 6 débouche dans un collecteur de répartition 8 destiné à être relié à la culasse du moteur. Le collecteur de répartition 8 permet une admission répartie, dans la culasse, du flux de gaz issu de l'échangeur de chaleur 6.  The heat exchanger 6 opens into a distribution manifold 8 intended to be connected to the cylinder head of the engine. The distribution manifold 8 allows a distributed inlet, in the cylinder head, of the gas stream coming from the heat exchanger 6.
Le collecteur de répartition 8 comprend un carter 10 de collecteur guidant, ici par l'intermédiaire de huit pipes, les gaz d'admission jusqu'à la culasse du moteur, à travers deux groupes distants de quatre orifices d'admission 12 chacun, destinés à être raccordés aux conduits d'admission de la culasse.  The distribution manifold 8 comprises a collector housing 10 guiding, here via eight pipes, the intake gases to the engine cylinder head, through two groups of four separate intake ports 12 each intended for to be connected to the intake ducts of the cylinder head.
Certains des orifices d'admission 12 sont prévus au niveau de projections 13, destinées à être insérées à l'intérieur des conduits d'admission. Il s'agit en particulier des orifices d'admission 12 d'un premier des groupes, celui du bas dans les figures. Ces projections 13 permettent d'assurer une étanchéité radiale avec la culasse alors que l'étanchéité sera de type axial au niveau de l'autre groupe d'orifices d'admission 12. Some of the intake ports 12 are provided at projections 13, intended to be inserted inside the intake ducts. These are in particular the intake ports 12 of a first group, the lower one in the figures. These projections 13 make it possible to ensure a radial seal with the cylinder head while that the seal will be of axial type at the level of the other group of intake ports 12.
Le collecteur de répartition 8 comprend également un conduit d'injection 14 pour injecter un flux de gaz d'échappement recirculés dans le flux de gaz d'admission en amont de la culasse.  The distribution manifold 8 also comprises an injection conduit 14 for injecting a flow of recirculated exhaust gas into the intake gas flow upstream of the cylinder head.
Avantageusement, selon l'invention, le conduit d'injection 14 est disposé à l'intérieur du carter 10 de façon à pouvoir être positionné entre les deux groupes d'orifices d'admission 12.  Advantageously, according to the invention, the injection conduit 14 is disposed inside the housing 10 so as to be positioned between the two groups of intake ports 12.
Selon le mode de réalisation représenté sur les dessins, le conduit d'injection 14 comprend des moyens d'injection se présentant sous la forme d'une pluralité d'orifices d'injection 16 orientés en direction des orifices d'admission 12.  According to the embodiment shown in the drawings, the injection duct 14 comprises injection means in the form of a plurality of injection orifices 16 oriented in the direction of the intake orifices 12.
Le collecteur de répartition 8 comprend également une entrée d'admission 18 d'un flux de gaz d'échappement recirculés issu d'une ligne d'échappement du moteur.  The distribution manifold 8 also comprises an intake inlet 18 of a stream of recirculated exhaust gas from an exhaust line of the engine.
Avantageusement, ainsi qu'il apparaît clairement à la figure 2, le module d'admission 2 se présente sous la forme d'un module unitaire intégrant la boîte d'entrée 4, l'échangeur de chaleur 6 et le collecteur de répartition 8 assujettis les uns aux autres. Ce module est ainsi destiné à être fixé, en un seul bloc, sur la culasse du moteur.  Advantageously, as clearly shown in FIG. 2, the intake module 2 is in the form of a unitary module integrating the inlet box 4, the heat exchanger 6 and the distribution manifold 8 subject to each other. This module is thus intended to be fixed in one piece on the cylinder head of the engine.
Selon un mode de réalisation préféré de l'invention, l'échangeur de chaleur 6 forme l'élément structural du module d'admission 2, c'est-à-dire qu'il agit comme un élément de structure porteur du module d'admission. En particulier, un tel élément, de préférence métallique, possède des caractéristiques mécaniques lui permettant de soutenir les autres éléments du module 2, qui sont rapportés sur lui, avant fixation du module sur le moteur.  According to a preferred embodiment of the invention, the heat exchanger 6 forms the structural element of the intake module 2, that is to say that it acts as a structural element carrying the module of admission. In particular, such an element, preferably metal, has mechanical characteristics enabling it to support the other elements of the module 2, which are attached to it, before fixing the module on the engine.
L'échangeur comporte, par exemple, un boîtier, ouvert vers la boîte d'entrée 4 et le collecteur de répartition 8, à l'intérieur duquel le faisceau d'échange de chaleur est placé. Le boîtier d'entrée 4 et/ou le collecteur 8 sont assujettis, notamment, audit boîtier. Les tubulures d'entrée/sortie pour le fluide caloporteur pourront aussi être fixées audit boîtier.  The exchanger comprises, for example, a housing, open to the inlet box 4 and the distribution manifold 8, inside which the heat exchange bundle is placed. The input box 4 and / or the collector 8 are subject, in particular, to said housing. The inlet / outlet pipes for the heat transfer fluid can also be fixed to said housing.
Le carter de collecteur 10 comprend une face d'entrée 20 du flux de gaz d'admission dans laquelle débouche la face de sortie du faisceau d'échange de chaleur de l'échangeur 6 et une face de sortie 22 destinée à être reliée à la face d'entrée des gaz de la culasse. Avantageusement, le conduit d'injection 14 est issu de la face de sortie 22 du carter de collecteur 10. The collector housing 10 comprises an inlet face 20 of the inlet gas flow into which the exit face of the heat exchange bundle of the exchanger 6 opens and an outlet face 22 intended to be connected to the inlet side of the cylinder head gases. Advantageously, the injection duct 14 comes from the outlet face 22 of the collector housing 10.
En outre, le positionnement du conduit d'injection 14 entre les deux groupes de conduits d'admission en fait un déflecteur du flux de gaz d'admission pour bien le diriger vers les conduits d'admission.  In addition, the positioning of the injection conduit 14 between the two groups of intake ducts makes it a deflector of the intake gas flow to direct it to the intake ducts.
De façon remarquable, cette structure du collecteur de répartition 8 de l'invention ne nécessite donc pas de prévoir un déflecteur distinct.  Remarkably, this structure of the distribution manifold 8 of the invention therefore does not require to provide a separate deflector.
La figure 3 illustre la structure du conduit d'injection 14 plus en détails.  Figure 3 illustrates the structure of the injection conduit 14 in more detail.
Avantageusement, le conduit d'injection 14 est de forme rectiligne. De préférence, il est positionné dans une position centrale/médiane par rapport aux deux groupes des orifices d'admission 12.  Advantageously, the injection conduit 14 is rectilinear. Preferably, it is positioned in a central / median position relative to the two groups of intake ports 12.
Les orifices d'injection 16, dont le nombre et les dimensions ne sont pas limités, sont alignés le long du conduit d'injection 14 sur deux lignes pour injecter les gaz d'échappement recirculés en direction de chaque groupe de conduits d'admission.  Injection ports 16, whose number and dimensions are not limited, are aligned along the injection conduit 14 on two lines for injecting the recirculated exhaust gas towards each group of intake ducts.
Cependant, on pourrait avoir des variantes dans lesquelles les orifices d'injection However, there could be variants in which the injection ports
16 sont répartis sur plus de deux lignes, par exemple en spirale ou en quinconce, etc. 16 are distributed over more than two lines, for example spiral or staggered, etc.
En outre, le conduit d'injection 14 comprend un orifice d'entrée 24 correspondant à l'entrée d'admission 18 du flux de gaz d'échappement recirculés. De préférence, l'orifice d'entrée 24 est situé entre les deux extrémités axiales 26 et 28 du conduit d'injection 14. Ici, il est raccordé au conduit d'injection 14 à une distance de l'une des extrémités dudit conduit sensiblement égale à un quart de la longueur du conduit d'injection 14.  In addition, the injection conduit 14 comprises an inlet orifice 24 corresponding to the intake inlet 18 of the recirculated exhaust gas stream. Preferably, the inlet orifice 24 is located between the two axial ends 26 and 28 of the injection duct 14. Here, it is connected to the injection duct 14 at a distance from one of the ends of said duct substantially equal to one quarter of the length of the injection conduit 14.
Les flèches pleines de la figure 4 illustrent la circulation des gaz recirculés depuis l'entrée d'admission 18 vers le conduit d'injection 14 en passant par l'orifice d'entrée 24. Ensuite, les gaz sont injectés depuis les orifices d'injection 16 vers les orifices d'admission 12, par exemple selon une direction sensiblement orthogonale au flux de gaz d'admission, ce qui favorise le mélange.  The solid arrows of FIG. 4 illustrate the circulation of the recirculated gases from the intake inlet 18 to the injection conduit 14 via the inlet orifice 24. Then, the gases are injected from the orifices of injection 16 to the inlet ports 12, for example in a direction substantially orthogonal to the flow of intake gas, which promotes mixing.

Claims

Revendications claims
1 . Collecteur de répartition (8) de gaz dans des conduits d'admission d'un moteur thermique de véhicule automobile, lesdits conduits d'admission étant répartis selon au moins deux groupes distants, chaque conduit d'un groupe alimentant un même cylindre du moteur qu'un conduit de l'autre groupe, ledit collecteur (8) comprenant : 1. Distribution manifold (8) of gas in intake ducts of a motor vehicle engine, said intake ducts being distributed in at least two remote groups, each duct of a group feeding the same cylinder of the engine which a conduit of the other group, said manifold (8) comprising:
- un carter (10) de collecteur apte à être traversé par un flux de gaz d'admission; - a collector housing (10) adapted to be traversed by a flow of intake gas;
- un conduit d'injection (14) pour injecter un flux de gaz d'échappement recirculés dans le flux de gaz d'admission, an injection duct (14) for injecting a flow of recirculated exhaust gas into the intake gas flow,
le carter (10) étant apte à diriger le flux de gaz d'admission et le flux de gaz d'échappement recirculés vers les conduits d'admission du moteur et le conduit d'injection (14) étant disposé à l'intérieur du carter (10) de collecteur de façon à pouvoir être positionné entre les deux groupes de conduits d'admission. the casing (10) being adapted to direct the flow of intake gas and the stream of recirculated exhaust gas to the engine intake ducts and the injection duct (14) being disposed inside the casing (10) manifold so as to be positioned between the two groups of intake ducts.
2. Collecteur selon la revendication 1 , comprenant des orifices d'admission (12) destinés à être raccordés aux conduits d'admission.  2. Manifold according to claim 1, comprising intake ports (12) intended to be connected to the intake ducts.
3. Collecteur selon la revendication 2, dans lequel les orifices d'admission (12) sont alignés en deux groupes distincts et le conduit d'injection (14) est positionné dans une position intermédiaire par rapport aux deux groupes d'orifices d'admission (12).  3. A manifold according to claim 2, wherein the inlet ports (12) are aligned in two distinct groups and the injection pipe (14) is positioned in an intermediate position with respect to the two groups of intake ports. (12).
4. Collecteur selon l'une quelconque des revendications précédentes, dans lequel le carter (10) comprend une face d'entrée (20) du flux de gaz d'admission et une face de sortie (22) destinée à se trouver en regard du moteur et le conduit d'injection (14) est issu de la face de sortie (22) du carter (10) de collecteur.  4. A collector according to any one of the preceding claims, wherein the housing (10) comprises an inlet face (20) of the intake gas flow and an outlet face (22) intended to be opposite the engine and the injection conduit (14) is from the outlet face (22) of the collector housing (10).
5. Collecteur selon l'une quelconque des revendications précédentes, dans lequel le conduit d'injection (14) est de forme rectiligne.  5. A collector according to any one of the preceding claims, wherein the injection duct (14) is of rectilinear shape.
6. Collecteur selon l'une quelconque des revendications précédentes, dans lequel le conduit d'injection (14) comprend une pluralité d'orifices d'injection (16) orientés en direction des orifices d'admission (12). 6. A manifold according to any one of the preceding claims, wherein the injection conduit (14) comprises a plurality of injection ports (16) oriented towards the inlet ports (12).
7. Collecteur selon l'une quelconque des revendications 5 ou 6, dans lequel les orifices d'injection (16) sont alignés le long du conduit d'injection (14) sur au moins deux lignes. 7. A manifold according to any one of claims 5 or 6, wherein the injection ports (16) are aligned along the injection conduit (14) on at least two lines.
8. Collecteur selon la revendication 7, dans lequel les orifices d'injection (16) sont alignés le long du conduit d'injection (14) sur deux lignes pour injecter les gaz d'échappement recirculés, selon deux directions opposées. The manifold of claim 7, wherein the injection ports (16) are aligned along the injection conduit (14) on two lines for injecting the recirculated exhaust gas in two opposite directions.
9. Collecteur selon l'une quelconque des revendications précédentes, dans lequel le conduit d'injection (14) possédant deux extrémités axiales (26,28), ledit conduit d'injection (14) comprend un orifice d'entrée (24) du flux de gaz d'échappement recirculés situé entre les deux extrémités (26,28).  9. A manifold according to any preceding claim, wherein the injection conduit (14) having two axial ends (26,28), said injection conduit (14) comprises an inlet (24) of the recirculated exhaust stream located between the two ends (26,28).
10. Collecteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit d'injection (14) est configuré de façon à défléchir le flux de gaz d'admission.  Collector according to any one of the preceding claims, characterized in that the injection duct (14) is configured to deflect the flow of intake gas.
1 1 . Module (2) d'admission de gaz dans un moteur thermique de véhicule automobile, comprenant un échangeur de chaleur (6) et un collecteur de répartition (8) des gaz selon l'une quelconque des revendications 1 à 10.  1 1. Module (2) for admitting gas into a motor vehicle engine, comprising a heat exchanger (6) and a distribution manifold (8) for the gases according to any one of Claims 1 to 10.
EP11778930.5A 2010-11-08 2011-11-07 Gas distribution manifold and corresponding gas intake module Withdrawn EP2638275A1 (en)

Applications Claiming Priority (2)

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FR1059205A FR2967215B1 (en) 2010-11-08 2010-11-08 GAS DISTRIBUTION COLLECTOR AND CORRESPONDING GAS ADMISSION MODULE
PCT/EP2011/069576 WO2012062715A1 (en) 2010-11-08 2011-11-07 Gas distribution manifold and corresponding gas intake module

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EP (1) EP2638275A1 (en)
JP (1) JP5985490B2 (en)
CN (1) CN103443439B (en)
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WO2012062715A1 (en) 2012-05-18
US20130291842A1 (en) 2013-11-07
US9441578B2 (en) 2016-09-13
CN103443439B (en) 2017-08-25
FR2967215A1 (en) 2012-05-11
CN103443439A (en) 2013-12-11
JP5985490B2 (en) 2016-09-06
JP2013541674A (en) 2013-11-14
FR2967215B1 (en) 2016-01-01

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