EP1764500A1 - Air intake manifold incorporating a part of an EGR circuit and IC engine comprising such air intake manifold - Google Patents

Air intake manifold incorporating a part of an EGR circuit and IC engine comprising such air intake manifold Download PDF

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Publication number
EP1764500A1
EP1764500A1 EP06300946A EP06300946A EP1764500A1 EP 1764500 A1 EP1764500 A1 EP 1764500A1 EP 06300946 A EP06300946 A EP 06300946A EP 06300946 A EP06300946 A EP 06300946A EP 1764500 A1 EP1764500 A1 EP 1764500A1
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EP
European Patent Office
Prior art keywords
chamber
intake manifold
exhaust gas
inlet
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06300946A
Other languages
German (de)
French (fr)
Inventor
Nicolas Deleforterie
Philippe Violante
Rémy Priou
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
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1764500A1 publication Critical patent/EP1764500A1/en
Withdrawn legal-status Critical Current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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M26/21—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 with EGR valves located at or near the connection 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line

Definitions

  • the present invention relates to an intake distributor of an internal combustion engine, preferably a diesel type engine.
  • the internal combustion engines comprise a cylinder head inside which is the combustion chamber provided with cylinders, and on which are fixed an air intake distributor and a exhaust gas exhaust manifold.
  • the diesel-type internal combustion engines also include an exhaust gas recirculation circuit called the Exhausted Gas Recirculation (EGR) circuit.
  • EGR Exhausted Gas Recirculation
  • the exhaust gas recirculation circuit recovers a portion of exhaust gas from the exhaust manifold and redirects it after cooling into the air intake manifold. These recirculating exhaust gases are thus burnt in the cylinders.
  • This recycling by recirculation of a portion of the exhaust gas reduces the release of pollutant components of the exhaust gas into the atmosphere.
  • Such an exhaust gas recirculation circuit comprises a heat exchanger for cooling the exhaust gas, a valve for regulating the flow of these recirculating exhaust gases and the ducts necessary for the transport of the recirculating exhaust gas. .
  • valve and the heat exchanger are generally fixed to the cylinder head or the cylinder block by fixing lugs and / or crutches, which increases the complexity and the assembly time of the engine.
  • legs or mounting brackets are subjected to significant vibration of the engine which increases the noise of the engine and may cause their rupture.
  • the present invention proposes a new intake distributor which makes it possible to dispense with the legs or support legs of the various elements of the exhaust gas recirculation circuit.
  • an intake distributor of an internal combustion engine which comprises a chamber ensuring the connection between several parts of an exhaust gas recirculation circuit, this chamber having an inlet intended to be connected directly to an exhaust gas recirculation channel, an outlet intended to be connected directly to the inlet of a heat exchanger and, between the inlet and the outlet, a regulating opening for the introduction into the chamber of the mechanism of a valve.
  • the chamber which is also part of the exhaust gas recirculation circuit serves as a support for fixing the elements of said recirculation circuit.
  • valve and the heat exchanger which are directly connected to said inlet distributor chamber are more resistant to vibration of the engine.
  • the intake manifold according to the invention, it is possible to reduce the number of parts of the exhaust gas recirculation circuit and to make the assembly consisting of the intake manifold and the recirculation circuit more compact .
  • a portion of the exhaust gas recirculation circuit is integrated with the intake distributor, which reduces the assembly time, the cost and the mass of the engine.
  • the invention also relates to an internal combustion engine comprising an intake distributor as described above.
  • FIGS 1 and 2 there is shown an air intake manifold 7 of an internal combustion engine.
  • This air intake manifold 7 is fixed on a cylinder head (not shown) to open into the combustion chamber defined inside four cylinders (not shown).
  • It comprises an inlet 70 through which fresh air coming from the atmosphere and substantially aligned outlet orifices 79 which open into the cylinders of the combustion chamber.
  • a mounting bracket 79A for fixing the inlet distributor 7 to the cylinder head.
  • the fresh air injected by the intake manifold is mixed with the fuel and the mixture of fresh air and fuel is burned in the cylinders.
  • an exhaust manifold which is fixed on the cylinder head and into which the cylinders open.
  • This exhaust manifold includes exhaust ducts (not shown) vis-à-vis the cylinders to convey the exhaust gas to an exhaust line (not shown).
  • the internal combustion engine also comprises a recirculation circuit 9 of the exhaust gas.
  • the intake distributor 7 of the internal combustion engine comprises a chamber 8 ensuring the connection between several parts of the recirculation circuit 9 of the exhaust gas.
  • This junction chamber 8 constitutes an additional part of the intake distributor 7 which has just formed with it.
  • This junction chamber 8 is also part of the recirculation circuit 9 of the exhaust gas.
  • the inlet 84 intended to be connected directly to a recirculation channel (not shown) of the exhaust gas.
  • the inlet of the chamber 8 is formed of a pipe 84 whose mouth, situated at one end of the row formed by the outlet orifices 79, is bordered by a fixing support 84A intended to receive the end of an exhaust gas recirculation channel.
  • the fixing support 84A bordering the mouth of the inlet pipe 84 of the chamber 8 extends in the extension of the fixing brackets 79A surrounding the outlet orifices 79 of the inlet distributor 7.
  • the fixing support 84A and the fixing brackets 79A form a single support which surrounds the outlet orifices 79 and the mouth of the tubing 84.
  • the chamber 8 is located on an outer edge of the inlet distributor 7, near the cylinder head so that the mouth of the inlet pipe 84 of the chamber 8 is positioned vis-à-vis the recirculation channel exhaust gas.
  • the exhaust gas recirculation channel is formed in the cylinder head.
  • Such an exhaust gas recirculation channel integrated into the cylinder head allows for a more compact engine.
  • the chamber 8 also has an outlet intended to be connected directly to the inlet of a heat exchanger 92.
  • the outlet of the chamber is formed of a pipe 82 whose mouth is bordered by a fixing support 82A for receive the heat exchanger 92.
  • a duct 94 is provided which makes it possible to connect this heat exchanger 92 to the inlet of the intake circuit 7.
  • the heat exchanger 92 also includes a cooling circuit which includes an inlet channel 95 of a coolant and an outlet channel 96 of the coolant. This cooling circuit passes through the heat exchanger 92 and makes it possible to cool the exhaust gases that pass through this heat exchanger 92.
  • the chamber 8 comprises a regulating opening for the introduction into the chamber 8 of the mechanism of a regulating valve 91.
  • the regulating opening of the chamber 8 is bordered by a fixing support 91 A intended to receive the regulation valve 91.
  • the fixing support 91 A on which the valve 91 is fixed is here situated in the upper part of the chamber 8.
  • the mechanism of the valve 91 makes it possible to regulate the flow of the recirculating exhaust gas in the recirculation circuit 9 of the exhaust gas.
  • the chamber 8 of the inlet distributor 7 according to the invention which serves to fix the various elements of the exhaust gas recirculation circuit 9 and which constitutes a part of this recirculation circuit, makes it possible to have a compact motor.
  • the operation of the motor is as follows.
  • the exhaust gases from the combustion of the mixture of fresh gas and fuel in the cylinders are discharged to the exhaust manifold. Part of the exhaust gas is redirected to the recirculation circuit 9 of the exhaust gas through the recirculation channel.
  • the recirculating exhaust gas then passes through the inlet pipe 84 of the junction chamber 8.
  • the opening of the valve 91 by means of its mechanism introduced into the chamber 8, makes it possible to circulate the recirculation exhaust gas in the outlet pipe 82, in the direction of the heat exchanger 92.
  • the recirculating exhaust gases are cooled by means of the coolant circulating in the inlet ducts 95 and the outlet ducts 96 of the cooling circuit. cooling. Then, at the outlet of this heat exchanger 92, the recirculation exhaust gas is conveyed by the duct 94 connected to the inlet of the intake circuit 7.
  • the recirculating exhaust gas is then mixed with the fresh air admitted by the inlet 70 of the inlet distributor 7 and are directed towards the outlet orifices 79 of the inlet distributor 7. Beyond these orifices of At outlet 79, the mixture of fresh air and recirculating exhaust gas is admitted into the cylinders of the cylinder head. The recirculating exhaust gases are then burnt in the cylinders. Then the exhaust gases resulting from this combustion are discharged to the exhaust manifold and the exhaust line, while a part of these exhaust gases is removed for recycling into the recirculation circuit 9 of the exhaust gases. 'exhaust.
  • the chamber 8 of the inlet distributor can also serve as a mounting bracket for other parts.
  • it can serve as a support for fixing an oil gauge 99 which, here, in FIGS. 1 and 2, is fixed by a fastening lug 99A to the heat exchanger 92.

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

Abstract

The inlet manifold, especially for a diesel engine, incorporates a chamber (8) for connecting the components of an Exhaust Gas Recirculation (EGR) circuit (9). The chamber has an inlet tube connected directly to an EGR channel in the engine's clinder head, an outlet connected to the inlet of a heat exchanger (92), and an aperture between the two for a regulating valve (91). The outlet is in the form of a tube (82) with an end fixing (82A) for connecting to the heat exchanger.

Description

DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTIONTECHNICAL FIELD TO WHICH THE INVENTION REFERS

La présente invention concerne un répartiteur d'admission d'un moteur à combustion interne, préférentiellement un moteur du type diesel.The present invention relates to an intake distributor of an internal combustion engine, preferably a diesel type engine.

ARRIERE-PLAN TECHNOLOGIQUEBACKGROUND

Les moteurs à combustion interne comprennent une culasse à l'intérieur de laquelle se trouve la chambre de combustion pourvue de cylindres, et sur laquelle sont fixés un répartiteur d'admission d'air ainsi qu'un collecteur d'échappement des gaz brûlés.The internal combustion engines comprise a cylinder head inside which is the combustion chamber provided with cylinders, and on which are fixed an air intake distributor and a exhaust gas exhaust manifold.

Habituellement, les moteurs à combustion interne de type diesel comprennent également un circuit de recirculation des gaz d'échappement appelé circuit EGR (Exhausted Gaz Recirculation).Usually, the diesel-type internal combustion engines also include an exhaust gas recirculation circuit called the Exhausted Gas Recirculation (EGR) circuit.

Le circuit de recirculation des gaz d'échappement récupère une partie des gaz d'échappement du collecteur d'échappement et la redirige après refroidissement dans le répartiteur d'admission d'air. Ces gaz d'échappement de recirculation sont ainsi rebrûlés dans les cylindres.The exhaust gas recirculation circuit recovers a portion of exhaust gas from the exhaust manifold and redirects it after cooling into the air intake manifold. These recirculating exhaust gases are thus burnt in the cylinders.

Ce recyclage par recirculation d'une partie des gaz d'échappement permet de diminuer le rejet de composants polluants des gaz d'échappement dans l'atmosphère.This recycling by recirculation of a portion of the exhaust gas reduces the release of pollutant components of the exhaust gas into the atmosphere.

Un tel circuit de recirculation des gaz d'échappement comporte un échangeur de chaleur pour refroidir les gaz d'échappement, une vanne pour réguler le flux de ces gaz d'échappement de recirculation et les conduits nécessaires au transport des gaz d'échappement de recirculation.Such an exhaust gas recirculation circuit comprises a heat exchanger for cooling the exhaust gas, a valve for regulating the flow of these recirculating exhaust gases and the ducts necessary for the transport of the recirculating exhaust gas. .

L'introduction de tous ces composants dans l'environnement du moteur pose un problème d'encombrement car l'espace disponible y est limité.The introduction of all these components into the engine environment poses a congestion problem because the space available is limited.

Ces différents éléments tels que la vanne et l'échangeur de chaleur sont généralement fixés à la culasse ou au carter cylindre par des pattes de fixation et/ou des béquilles, ce qui accroît la complexité et le temps d'assemblage du moteur.These various elements such as the valve and the heat exchanger are generally fixed to the cylinder head or the cylinder block by fixing lugs and / or crutches, which increases the complexity and the assembly time of the engine.

En outre, les pattes ou béquilles de fixation sont soumises à d'importantes vibrations du moteur ce qui augmente le bruit du moteur et risque de provoquer leur rupture.In addition, the legs or mounting brackets are subjected to significant vibration of the engine which increases the noise of the engine and may cause their rupture.

Enfin, elles représentent un surcoût en tant que pièces supplémentaires du circuit de recirculation des gaz d'échappement et elles augmentent la masse du moteur.Finally, they represent an additional cost as additional parts of the exhaust gas recirculation circuit and they increase the mass of the engine.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

La présente invention propose un nouveau répartiteur d'admission qui permet de s'affranchir des pattes ou béquilles de fixation des différents éléments du circuit de recirculation des gaz d'échappement.The present invention proposes a new intake distributor which makes it possible to dispense with the legs or support legs of the various elements of the exhaust gas recirculation circuit.

À cet effet, on propose selon l'invention un répartiteur d'admission d'un moteur à combustion interne, qui comporte une chambre assurant la jonction entre plusieurs pièces d'un circuit de recirculation des gaz d'échappement, cette chambre comportant une entrée destinée à être connectée directement à un canal de recirculation des gaz d'échappement, une sortie destinée à être connectée directement à l'entrée d'un échangeur de chaleur et, entre l'entrée et la sortie, une ouverture de régulation pour l'introduction dans la chambre du mécanisme d'une vanne.For this purpose, it is proposed according to the invention an intake distributor of an internal combustion engine, which comprises a chamber ensuring the connection between several parts of an exhaust gas recirculation circuit, this chamber having an inlet intended to be connected directly to an exhaust gas recirculation channel, an outlet intended to be connected directly to the inlet of a heat exchanger and, between the inlet and the outlet, a regulating opening for the introduction into the chamber of the mechanism of a valve.

Avantageusement, dans le répartiteur d'admission selon l'invention, la chambre qui fait aussi partie du circuit de recirculation des gaz d'échappement sert de support pour la fixation des éléments dudit circuit de recirculation.Advantageously, in the intake manifold according to the invention, the chamber which is also part of the exhaust gas recirculation circuit serves as a support for fixing the elements of said recirculation circuit.

En particulier, la vanne et l'échangeur de chaleur qui sont directement reliés à ladite chambre du répartiteur d'admission résistent mieux aux vibrations du moteur.In particular, the valve and the heat exchanger which are directly connected to said inlet distributor chamber are more resistant to vibration of the engine.

Ainsi, grâce au répartiteur d'admission selon l'invention, il est possible de diminuer le nombre de pièces du circuit de recirculation des gaz d'échappement et de rendre l'ensemble constitué du répartiteur d'admission et du circuit de recirculation plus compact.Thus, thanks to the intake manifold according to the invention, it is possible to reduce the number of parts of the exhaust gas recirculation circuit and to make the assembly consisting of the intake manifold and the recirculation circuit more compact .

Enfin, grâce à la chambre de jonction du répartiteur d'admission selon l'invention, une partie du circuit de recirculation des gaz d'échappement est intégrée au répartiteur d'admission, ce qui diminue le temps d'assemblage, le coût et la masse du moteur.Finally, thanks to the junction chamber of the intake distributor according to the invention, a portion of the exhaust gas recirculation circuit is integrated with the intake distributor, which reduces the assembly time, the cost and the mass of the engine.

D'autres caractéristiques avantageuses et non limitatives du répartiteur d'admission selon l'invention sont les suivantes :

  • la sortie de la chambre est formée d'une tubulure dont l'extrémité est bordée par un support de fixation destiné à recevoir l'échangeur de chaleur ;
  • l'ouverture de régulation de la chambre est bordée par un support de fixation destiné à recevoir la vanne ;
  • l'entrée de la chambre est formée d'une tubulure dont l'extrémité est bordée par un support de fixation destiné à recevoir le canal de recirculation des gaz d'échappement ;
  • le moteur comporte une culasse qui comprend le canal de recirculation des gaz d'échappement ;
  • la chambre est située sur un bord extérieur du répartiteur d'admission, à proximité de la culasse;
  • la chambre vient de formation avec le répartiteur d'admission.
Other advantageous and non-limiting characteristics of the intake distributor according to the invention are the following:
  • the outlet of the chamber is formed of a pipe whose end is bordered by a fixing support for receiving the heat exchanger;
  • the regulating opening of the chamber is bordered by a fixing support intended to receive the valve;
  • the inlet of the chamber is formed of a pipe whose end is bordered by a mounting bracket for receiving the recirculation channel of the exhaust gas;
  • the engine has a cylinder head that includes the exhaust gas recirculation channel;
  • the chamber is located on an outer edge of the intake manifold, near the cylinder head;
  • the room comes from training with the intake distributor.

L'invention concerne également un moteur à combustion interne comprenant un répartiteur d'admission tel que décrit ci-dessus.The invention also relates to an internal combustion engine comprising an intake distributor as described above.

DESCRIPTION DETAILLEE D'UN EXEMPLE DE REALISATIONDETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT

La description qui va suivre en regard des dessins annexés d'un mode de réalisation, donné à titre d'exemple non limitatif, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The following description with reference to the accompanying drawings of an embodiment, given by way of non-limiting example, will make it clear what the invention consists of and how it can be achieved.

Sur les dessins annexés :

  • la figure 1 est une vue en perspective d'un répartiteur d'admission selon l'invention sur lequel sont rapportés des éléments d'un circuit de recirculation des gaz d'échappement ;
  • la figure 2 est une vue en perspective sous un autre angle de la figure 1.
In the accompanying drawings:
  • Figure 1 is a perspective view of an intake manifold according to the invention on which are reported elements of an exhaust gas recirculation circuit;
  • Figure 2 is a perspective view from another angle of Figure 1.

Sur les figures 1 et 2 on a représenté un répartiteur d'admission d'air 7 d'un moteur à combustion interne.In Figures 1 and 2 there is shown an air intake manifold 7 of an internal combustion engine.

Ce répartiteur d'admission d'air 7 est fixé sur une culasse (non représentée) pour déboucher dans la chambre de combustion définie à l'intérieur de quatre cylindres (non représentés).This air intake manifold 7 is fixed on a cylinder head (not shown) to open into the combustion chamber defined inside four cylinders (not shown).

Il comporte une entrée 70 par laquelle arrive de l'air frais issu de l'atmosphère et des orifices de sortie 79 sensiblement alignés qui débouchent dans les cylindres de la chambre de combustion.It comprises an inlet 70 through which fresh air coming from the atmosphere and substantially aligned outlet orifices 79 which open into the cylinders of the combustion chamber.

Autour des orifices de sortie 79, il est prévu un support de fixation 79A pour la fixation du répartiteur d'admission 7 à la culasse.Around the outlet orifices 79, there is provided a mounting bracket 79A for fixing the inlet distributor 7 to the cylinder head.

L'air frais injecté par le répartiteur d'admission est mélangé au carburant et le mélange d'air frais et de carburant est brûlé dans les cylindres.The fresh air injected by the intake manifold is mixed with the fuel and the mixture of fresh air and fuel is burned in the cylinders.

Pour évacuer les gaz brûlés après leur combustion, il est prévu un collecteur d'échappement fixé sur la culasse et dans lequel débouchent les cylindres. Ce collecteur d'échappement comprend des conduits d'échappement (non représentés) en vis-à-vis des cylindres pour véhiculer les gaz d'échappement vers une ligne d'échappement (non représentée).To evacuate the burnt gases after their combustion, an exhaust manifold is provided which is fixed on the cylinder head and into which the cylinders open. This exhaust manifold includes exhaust ducts (not shown) vis-à-vis the cylinders to convey the exhaust gas to an exhaust line (not shown).

Le moteur à combustion interne comprend aussi un circuit de recirculation 9 des gaz d'échappement.The internal combustion engine also comprises a recirculation circuit 9 of the exhaust gas.

Avantageusement selon l'invention, le répartiteur d'admission 7 du moteur à combustion interne comporte une chambre 8 assurant la jonction entre plusieurs pièces du circuit de recirculation 9 des gaz d'échappement.Advantageously according to the invention, the intake distributor 7 of the internal combustion engine comprises a chamber 8 ensuring the connection between several parts of the recirculation circuit 9 of the exhaust gas.

Cette chambre 8 de jonction constitue une partie supplémentaire du répartiteur d'admission 7 qui vient de formation avec celui-ci.This junction chamber 8 constitutes an additional part of the intake distributor 7 which has just formed with it.

Cette chambre 8 de jonction constitue aussi une partie du circuit de recirculation 9 des gaz d'échappement.This junction chamber 8 is also part of the recirculation circuit 9 of the exhaust gas.

Elle comporte tout d'abord une entrée 84 destinée à être connectée directement à un canal de recirculation (non représenté) des gaz d'échappement. L'entrée de la chambre 8 est formée d'une tubulure 84 dont l'embouchure, située à une extrémité de la rangée formée par les orifices de sortie 79, est bordée par un support de fixation 84A destiné à recevoir l'extrémité d'un canal de recirculation des gaz d'échappement.It comprises first an inlet 84 intended to be connected directly to a recirculation channel (not shown) of the exhaust gas. The inlet of the chamber 8 is formed of a pipe 84 whose mouth, situated at one end of the row formed by the outlet orifices 79, is bordered by a fixing support 84A intended to receive the end of an exhaust gas recirculation channel.

Le support de fixation 84A bordant l'embouchure de la tubulure 84 d'entrée de la chambre 8 s'étend dans le prolongement des supports de fixation 79A entourant les orifices de sortie 79 du répartiteur d'admission 7.The fixing support 84A bordering the mouth of the inlet pipe 84 of the chamber 8 extends in the extension of the fixing brackets 79A surrounding the outlet orifices 79 of the inlet distributor 7.

D'ailleurs, le support de fixation 84A et les supports de fixation 79A forment un seul support qui entoure les orifices de sortie 79 et l'embouchure de la tubulure 84.Moreover, the fixing support 84A and the fixing brackets 79A form a single support which surrounds the outlet orifices 79 and the mouth of the tubing 84.

La chambre 8 est située sur un bord extérieur du répartiteur d'admission 7, à proximité de la culasse de sorte que l'embouchure de la tubulure d'entrée 84 de la chambre 8 est positionnée en vis-à-vis du canal de recirculation des gaz d'échappement.The chamber 8 is located on an outer edge of the inlet distributor 7, near the cylinder head so that the mouth of the inlet pipe 84 of the chamber 8 is positioned vis-à-vis the recirculation channel exhaust gas.

Avantageusement le canal de recirculation des gaz d'échappement est pratiqué dans la culasse. Un tel canal de recirculation des gaz d'échappement intégré à la culasse permet d'avoir un moteur plus compact.Advantageously, the exhaust gas recirculation channel is formed in the cylinder head. Such an exhaust gas recirculation channel integrated into the cylinder head allows for a more compact engine.

La chambre 8 comporte aussi une sortie destinée à être connectée directement à l'entrée d'un échangeur de chaleur 92. La sortie de la chambre est formée d'une tubulure 82 dont l'embouchure est bordée par un support de fixation 82A destiné à recevoir l'échangeur de chaleur 92.The chamber 8 also has an outlet intended to be connected directly to the inlet of a heat exchanger 92. The outlet of the chamber is formed of a pipe 82 whose mouth is bordered by a fixing support 82A for receive the heat exchanger 92.

En sortie de cet échangeur de chaleur 92, il est prévu un conduit 94 qui permet de relier cet échangeur de chaleur 92 à l'entrée du circuit d'admission 7.At the outlet of this heat exchanger 92, a duct 94 is provided which makes it possible to connect this heat exchanger 92 to the inlet of the intake circuit 7.

L'échangeur de chaleur 92 comprend aussi un circuit de refroidissement qui comporte un canal d'entrée 95 d'un liquide de refroidissement et un canal de sortie 96 de ce liquide de refroidissement. Ce circuit de refroidissement traverse l'échangeur de chaleur 92 et permet de refroidir les gaz d'échappement qui transitent par cet échangeur de chaleur 92.The heat exchanger 92 also includes a cooling circuit which includes an inlet channel 95 of a coolant and an outlet channel 96 of the coolant. This cooling circuit passes through the heat exchanger 92 and makes it possible to cool the exhaust gases that pass through this heat exchanger 92.

Enfin, entre la tubulure 84 d'entrée et la tubulure 82 de sortie, la chambre 8 comporte une ouverture de régulation pour l'introduction dans la chambre 8 du mécanisme d'une vanne 91 de régulation. L'ouverture de régulation de la chambre 8 est bordée par un support de fixation 91 A destiné à recevoir la vanne 91 de régulation.Finally, between the inlet pipe 84 and the outlet pipe 82, the chamber 8 comprises a regulating opening for the introduction into the chamber 8 of the mechanism of a regulating valve 91. The regulating opening of the chamber 8 is bordered by a fixing support 91 A intended to receive the regulation valve 91.

Le support de fixation 91 A sur lequel est fixée la vanne 91 est ici situé en partie supérieure de la chambre 8.The fixing support 91 A on which the valve 91 is fixed is here situated in the upper part of the chamber 8.

Le mécanisme de la vanne 91 permet de réguler le flux des gaz d'échappement de recirculation dans le circuit de recirculation 9 des gaz d'échappement.The mechanism of the valve 91 makes it possible to regulate the flow of the recirculating exhaust gas in the recirculation circuit 9 of the exhaust gas.

Ainsi, la chambre 8 du répartiteur d'admission 7 selon l'invention, qui sert à la fixation des différents éléments du circuit de recirculation 9 des gaz d'échappement et qui constitue une partie de ce circuit de recirculation, permet d'avoir un moteur compact.Thus, the chamber 8 of the inlet distributor 7 according to the invention, which serves to fix the various elements of the exhaust gas recirculation circuit 9 and which constitutes a part of this recirculation circuit, makes it possible to have a compact motor.

Le fonctionnement du moteur est le suivant. Les gaz d'échappement issus de la combustion du mélange de gaz frais et de carburant dans les cylindres sont évacués vers le collecteur d'échappement. Une partie des gaz d'échappement est redirigée vers le circuit de recirculation 9 des gaz d'échappement en passant par le canal de recirculation.The operation of the motor is as follows. The exhaust gases from the combustion of the mixture of fresh gas and fuel in the cylinders are discharged to the exhaust manifold. Part of the exhaust gas is redirected to the recirculation circuit 9 of the exhaust gas through the recirculation channel.

Les gaz d'échappement de recirculation passent alors à travers la tubulure 84 d'entrée de la chambre 8 de jonction. L'ouverture de la vanne 91, au moyen de son mécanisme introduit au sein de la chambre 8, permet de faire circuler les gaz d'échappement de recirculation dans la tubulure 82 de sortie, en direction de l'échangeur de chaleur 92.The recirculating exhaust gas then passes through the inlet pipe 84 of the junction chamber 8. The opening of the valve 91, by means of its mechanism introduced into the chamber 8, makes it possible to circulate the recirculation exhaust gas in the outlet pipe 82, in the direction of the heat exchanger 92.

Lors de son passage dans l'échangeur de chaleur 92 les gaz d'échappement de recirculation sont refroidis au moyen du liquide de refroidissement circulant dans les conduits d'entrée 95 et de sortie 96 du circuit de refroidissement. Puis, en sortie de cet échangeur de chaleur 92, les gaz d'échappement de recirculation sont véhiculés par le conduit 94 relié à l'entrée du circuit d'admission 7.During its passage through the heat exchanger 92, the recirculating exhaust gases are cooled by means of the coolant circulating in the inlet ducts 95 and the outlet ducts 96 of the cooling circuit. cooling. Then, at the outlet of this heat exchanger 92, the recirculation exhaust gas is conveyed by the duct 94 connected to the inlet of the intake circuit 7.

Les gaz d'échappement de recirculation sont alors mélangés à l'air frais admis par l'entrée 70 du répartiteur d'admission 7 et sont dirigés vers les orifices de sortie 79 du répartiteur d'admission 7. Au-delà de ces orifices de sortie 79, le mélange d'air frais et de gaz d'échappement de recirculation est admis dans les cylindres de la culasse. Les gaz d'échappement de recirculation sont alors rebrûlés dans les cylindres. Puis les gaz d'échappement issus de cette combustion sont évacués vers le collecteur d'échappement et la ligne d'échappement, tandis qu'une partie de ces gaz d'échappement est prélevée pour être recyclée dans le circuit de recirculation 9 des gaz d'échappement.The recirculating exhaust gas is then mixed with the fresh air admitted by the inlet 70 of the inlet distributor 7 and are directed towards the outlet orifices 79 of the inlet distributor 7. Beyond these orifices of At outlet 79, the mixture of fresh air and recirculating exhaust gas is admitted into the cylinders of the cylinder head. The recirculating exhaust gases are then burnt in the cylinders. Then the exhaust gases resulting from this combustion are discharged to the exhaust manifold and the exhaust line, while a part of these exhaust gases is removed for recycling into the recirculation circuit 9 of the exhaust gases. 'exhaust.

Avantageusement, la chambre 8 du répartiteur d'admission peut aussi servir de support de fixation pour d'autres pièces. Par exemple, elle peut servir de support de fixation d'une jauge à huile 99 qui, ici, sur les figures 1 et 2, est fixée par une patte de fixation 99A à l'échangeur de chaleur 92.Advantageously, the chamber 8 of the inlet distributor can also serve as a mounting bracket for other parts. For example, it can serve as a support for fixing an oil gauge 99 which, here, in FIGS. 1 and 2, is fixed by a fastening lug 99A to the heat exchanger 92.

La présente invention n'est nullement limitée au mode de réalisation décrit et représenté, mais l'homme du métier saura y apporter toute variante conforme à son esprit.The present invention is not limited to the embodiment described and shown, but the art can apply any variant within his mind.

Claims (8)

Répartiteur d'admission (7) d'un moteur à combustion interne, caractérisé en ce qu'il comporte une chambre (8) assurant la jonction entre plusieurs pièces (91, 92) d'un circuit de recirculation (9) des gaz d'échappement, cette chambre (8) comportant : - une entrée destinée à être connectée directement à un canal de recirculation des gaz d'échappement, - une sortie destinée à être connectée directement à l'entrée d'un échangeur de chaleur (92) et, - entre l'entrée et la sortie, une ouverture de régulation pour l'introduction dans la chambre (8) du mécanisme d'une vanne (91). Intake manifold (7) of an internal combustion engine, characterized in that it comprises a chamber (8) connecting a plurality of parts (91, 92) of a recirculation circuit (9) of the combustion gases. exhaust, this chamber (8) comprising: an inlet intended to be connected directly to an exhaust gas recirculation channel, an outlet intended to be connected directly to the inlet of a heat exchanger (92) and, - Between the inlet and the outlet, a regulating opening for the introduction into the chamber (8) of the mechanism of a valve (91). Répartiteur d'admission (7) selon la revendication 1, caractérisé en ce que l'entrée de la chambre (8) est formée d'une tubulure (84) dont l'extrémité est bordée par un support de fixation (84A) destiné à recevoir le canal de recirculation des gaz d'échappement.Intake manifold (7) according to claim 1, characterized in that the inlet of the chamber (8) is formed of a pipe (84) whose end is bordered by a fixing support (84A) for receive the exhaust gas recirculation channel. Répartiteur d'admission (7) selon l'une des revendications précédentes, caractérisé en ce que la sortie de la chambre (8) est formée d'une tubulure (82) dont l'extrémité est bordée par un support de fixation (82A) destiné à recevoir l'échangeur de chaleur (92).Intake manifold (7) according to one of the preceding claims, characterized in that the outlet of the chamber (8) is formed of a pipe (82) whose end is bordered by a mounting bracket (82A) for receiving the heat exchanger (92). Répartiteur d'admission (7) selon l'une des revendications précédentes, caractérisé en ce que l'ouverture de régulation de la chambre (8) est bordée par un support de fixation (91 A) destiné à recevoir la vanne (91).Intake manifold (7) according to one of the preceding claims, characterized in that the regulating opening of the chamber (8) is bordered by a fixing support (91 A) for receiving the valve (91). Répartiteur d'admission (7) selon l'une des revendications précédentes, caractérisé en ce que le moteur comporte une culasse qui comprend le canal de recirculation des gaz d'échappement.Intake manifold (7) according to one of the preceding claims, characterized in that the engine comprises a cylinder head which comprises the exhaust gas recirculation channel. Répartiteur d'admission (7) selon la revendication précédente, caractérisé en ce que la chambre (8) est située sur un bord extérieur du répartiteur d'admission (7), à proximité de la culasse.Intake manifold (7) according to the preceding claim, characterized in that the chamber (8) is located on an outer edge of the intake manifold (7), near the cylinder head. Répartiteur d'admission (7) selon l'une des revendications précédentes, caractérisé en ce que la chambre (8) vient de formation avec le répartiteur d'admission (7).Intake manifold (7) according to one of the preceding claims, characterized in that the chamber (8) is formed with the inlet distributor (7). Moteur à combustion interne comprenant un répartiteur d'admission (7) selon l'une quelconque des revendications précédentes.An internal combustion engine comprising an intake distributor (7) according to any one of the preceding claims.
EP06300946A 2005-09-16 2006-09-13 Air intake manifold incorporating a part of an EGR circuit and IC engine comprising such air intake manifold Withdrawn EP1764500A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0509473A FR2891020B1 (en) 2005-09-16 2005-09-16 INTAKE DISTRIBUTOR INCORPORATING A PORTION OF AN EXHAUST GAS RECIRCULATION CIRCUIT AND INTERNAL COMBUSTION ENGINE COMPRISING SUCH AN INTAKE DISTRIBUTOR

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EP1764500A1 true EP1764500A1 (en) 2007-03-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506874A (en) * 2012-10-10 2014-04-16 Gm Global Tech Operations Inc I.c. engine intake air module with bypassable air cooler and EGR distribution pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375896A2 (en) * 2002-06-25 2004-01-02 Pierburg GmbH Air intake system
DE10341393B3 (en) * 2003-09-05 2004-09-23 Pierburg Gmbh Air induction port system for internal combustion engines has exhaust gas return passage made in one piece with casing, and exhaust gas return valve and throttle valve are constructed as cartridge valve for insertion in holes in casing
DE10344217A1 (en) * 2003-09-22 2005-04-14 Mahle Filtersysteme Gmbh Fresh gas-guiding section of a fresh gas system for an internal combustion engine, especially in a motor vehicle, comprises a lateral inlet opening for recirculated exhaust gas from an exhaust gas recirculation unit of the engine
EP1529952A2 (en) * 2003-11-07 2005-05-11 Hitachi, Ltd. Electronic EGR gas control system
EP1533512A2 (en) * 2003-11-19 2005-05-25 MAHLE Filtersysteme GmbH Intake device for an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375896A2 (en) * 2002-06-25 2004-01-02 Pierburg GmbH Air intake system
DE10341393B3 (en) * 2003-09-05 2004-09-23 Pierburg Gmbh Air induction port system for internal combustion engines has exhaust gas return passage made in one piece with casing, and exhaust gas return valve and throttle valve are constructed as cartridge valve for insertion in holes in casing
DE10344217A1 (en) * 2003-09-22 2005-04-14 Mahle Filtersysteme Gmbh Fresh gas-guiding section of a fresh gas system for an internal combustion engine, especially in a motor vehicle, comprises a lateral inlet opening for recirculated exhaust gas from an exhaust gas recirculation unit of the engine
EP1529952A2 (en) * 2003-11-07 2005-05-11 Hitachi, Ltd. Electronic EGR gas control system
EP1533512A2 (en) * 2003-11-19 2005-05-25 MAHLE Filtersysteme GmbH Intake device for an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506874A (en) * 2012-10-10 2014-04-16 Gm Global Tech Operations Inc I.c. engine intake air module with bypassable air cooler and EGR distribution pipe

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FR2891020A1 (en) 2007-03-23

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