EP0565410B1 - Integrated rail device for the exhaust gas recirculation of an internal combustion engine - Google Patents

Integrated rail device for the exhaust gas recirculation of an internal combustion engine Download PDF

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Publication number
EP0565410B1
EP0565410B1 EP93400837A EP93400837A EP0565410B1 EP 0565410 B1 EP0565410 B1 EP 0565410B1 EP 93400837 A EP93400837 A EP 93400837A EP 93400837 A EP93400837 A EP 93400837A EP 0565410 B1 EP0565410 B1 EP 0565410B1
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EP
European Patent Office
Prior art keywords
manifold
engine
support
aforesaid
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93400837A
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German (de)
French (fr)
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EP0565410A1 (en
Inventor
Christian Chapelle
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
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Automobiles Peugeot SA
Automobiles Citroen SA
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Publication of EP0565410A1 publication Critical patent/EP0565410A1/en
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Publication of EP0565410B1 publication Critical patent/EP0565410B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078—Connections of intake systems to the engine
    • F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • 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
    • F02M35/10242—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
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/44—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages

Definitions

  • the present invention relates to a device for recycling the exhaust gases of an internal combustion engine, and more particularly of a diesel engine.
  • the gases to be recycled are brought from at least one exhaust duct to a ramp forming a recycling manifold, mounted on the engine and connected separately to each of the fresh gas intake ducts arranged or formed in the cylinder head of the engine.
  • the present invention aims to remedy the drawbacks stated above, by proposing a compact and economical device to produce, in which the ramp is designed in a simple manner and able to withstand the mechanical stresses generated in the engine.
  • the subject of the invention is a device for recycling the exhaust gases of an internal combustion engine, of the type in which a ramp connected to the engine exhaust is connected separately to several intake ducts formed in the cylinder head of this engine, characterized in that the ramp came integrally with a support which comprises camshaft bearing elements and which covers the cylinder head, sections of conduit extending through the support in the extension of the cylinder head intake ducts.
  • each of the abovementioned sections of conduit is respectively connected to the ramp by a hole internal aligned with a hole opening on the outside of the ramp and closed by a plug.
  • each internal hole of the ramp has its own diameter and chosen to optimize the distribution of the recycled exhaust gases between the various engine intake ducts.
  • the aforementioned elements are camshaft bearing caps, integrally formed with the aforementioned support.
  • the device is also characterized in that the ramp is connected to an exhaust manifold via a distribution valve.
  • the invention is characterized in that the aforementioned distribution valve is connected to the ramp by means of a slightly flexible tube connected substantially in the middle of the ramp to a cylindrical connection integrated in the support.
  • an internal combustion engine 1 such as a diesel engine for example for a motor vehicle.
  • the reference numeral 11 designates the cylinder head of the engine 1.
  • the cylinder head 11 is a foundry piece inside which are formed or arranged four intake ducts 12 and four exhaust ducts 14 of the engine 1.
  • each of the cylinders (not shown) of the engine 1 communicates with one of the intake ducts 12 and one of the exhaust ducts 14, in order to respectively connect this cylinder to a gas intake system 20 " fresh "and to an exhaust system 40 for the burnt gases inside this cylinder.
  • the engine 1 includes a device 60 for recycling the burnt gases coming from the exhaust system 40.
  • the device 60 essentially consists of a manifold forming a manifold 65 for the gases to be recycled, which is connected on the one hand to the 'exhaust 40 and on the other hand to the intake system 20 of the engine 1.
  • the ramp 65 is in fact connected separately to each of the intake ducts 12, so as to distribute the gases to be recycled between the different cylinders of the engine 1 .
  • the ramp 65 has come integrally with a support 50 for bearing elements 52, capable of guiding a camshaft, of which only the longitudinal axis of rotation X is visible in FIG. 1.
  • the support 50 is a foundry part obtained by pressure casting of a metallic material such as aluminum, in which the elements 52 are bearing caps also coming from foundry.
  • the support 50 defines two parallel joint planes 50a, 50b which extend over substantially the entire length (along the axis X) of the motor 1.
  • the joint plane 50b covers and comes to bear against a corresponding joint plane of the cylinder head 11.
  • the support 50 in which the ramp 65 is integrated constitutes a cylinder head cover on the upper joint plane 50a from which a cover 13 is mounted.
  • the recycling ramp 65 defines in the support 50 an elongated cavity 65a whose cross section is substantially rectangular and which extends laterally along the axis X, over almost the entire length of the motor 1.
  • a section of conduit 62 which extends perpendicular to the planes 50a, 50b is formed in the support 50.
  • a section of conduit 62 passes through the support 50 in the extension of each of the conduits intake 12 of the cylinder head 11.
  • These sections 62 are generally parallel and connect each of the conduits 12 to the intake system 20 which is mounted on the cover 13.
  • each of these sections of conduit 62 is respectively connected to the internal cavity 65a of the ramp by an internal hole 63 arranged in alignment or opposite a corresponding through hole 64.
  • each of the holes 64 opens to the outside of the ramp 65 and is formed by the same cutting tool as the corresponding internal hole 63.
  • Each of the through holes 64 is hermetically sealed by a plug 66, for example force fitted.
  • the internal holes 63 may have different diameters.
  • the diameter - and therefore the cross-section - of each of the holes 63 is determined as a function of the specific characteristics of the engine and of the gas circulation in the device 60.
  • the ramp 65 projects from the lateral edge of the cylinder head 11 (between the joint planes 50a, 50b).
  • the latter has substantially in its middle along the direction of the axis X, a cylindrical connection 69 formed integrally with the ramp 65 and extending projecting from the lower joint plane 50b of the support 50.
  • a slightly flexible tube 67 by example made of stainless steel is fixed on the fitting 69 in order to connect the internal cavity 65a to a valve of distribution 68.
  • This valve 68 makes it possible to direct an appropriate quantity of exhaust gas to be recycled to the device 60. To do this, the valve 68 is connected to an exhaust manifold 48 into which the four conduits 14 of the cylinder head 11 open.
  • the tube 67 which connects the ramp 65 and the distribution valve 68 has bellows by which the shape of the tube 67 can be adapted to the relative position of the connector 69 of the ramp and of the valve 68.

Description

La présente invention se rapporte à un dispositif de recyclage des gaz d'échappement d'un moteur à combustion interne, et plus particulièrement d'un moteur diesel.The present invention relates to a device for recycling the exhaust gases of an internal combustion engine, and more particularly of a diesel engine.

On connaît déjà divers dispositifs qui permettent de recycler vers le système d'admission d'un moteur à combustion interne, une partie des gaz brûlés provenant de l'échappement de ce moteur. Avantageusement, les gaz à recycler sont amenés depuis au moins un conduit d'échappement vers une rampe formant collecteur de recyclage, montée sur le moteur et raccordée séparément à chacun des conduits d'admission de gaz frais agencés ou formés dans la culasse du moteur.Various devices are already known which allow part of the burnt gases coming from the exhaust of this engine to be recycled to the intake system of an internal combustion engine. Advantageously, the gases to be recycled are brought from at least one exhaust duct to a ramp forming a recycling manifold, mounted on the engine and connected separately to each of the fresh gas intake ducts arranged or formed in the cylinder head of the engine.

D'autre part, les moteurs actuels notamment pour véhicules automobiles doivent être à la fois compacts et simples à fabriquer. Toutefois, étant données les contraintes mécaniques liées aux conditions thermiques de fonctionnement d'un moteur à combustion interne, il est difficile d'intégrer une rampe de recyclage des gaz d'échappement à une pièce de fonderie du moteur obtenue par moulage en sable, comme par exemple une culasse.On the other hand, current engines, in particular for motor vehicles, must be both compact and simple to manufacture. However, given the mechanical constraints linked to the thermal operating conditions of an internal combustion engine, it is difficult to integrate an exhaust gas recycling manifold into a foundry part of the engine obtained by sand molding, as for example a cylinder head.

Aussi, la présente invention a pour but de remédier aux inconvénients énoncés ci-dessus, en proposant un dispositif compact et économique à réaliser, dans lequel la rampe est conçue de manière simple et apte à résister aux contraintes mécaniques générées dans le moteur.Also, the present invention aims to remedy the drawbacks stated above, by proposing a compact and economical device to produce, in which the ramp is designed in a simple manner and able to withstand the mechanical stresses generated in the engine.

A cet effet, l'invention a pour objet un dispositif de recyclage des gaz d'échappement d'un moteur à combustion interne, du type dans lequel une rampe raccordée à l'échappement du moteur est reliée séparément à plusieurs conduits d'admission formés dans la culasse de ce moteur, caractérisé en ce que la rampe est venue de matière avec un support qui comporte des éléments de paliers d'arbre à cames et qui couvre la culasse, des tronçons de conduit s'étendant à travers le support dans le prolongement des conduits d'admission de la culasse.To this end, the subject of the invention is a device for recycling the exhaust gases of an internal combustion engine, of the type in which a ramp connected to the engine exhaust is connected separately to several intake ducts formed in the cylinder head of this engine, characterized in that the ramp came integrally with a support which comprises camshaft bearing elements and which covers the cylinder head, sections of conduit extending through the support in the extension of the cylinder head intake ducts.

L'invention est également caractérisée en ce que chacun des tronçons de conduit précités est respectivement relié à la rampe par un trou interne aligné avec un trou débouchant à l'extérieur de la rampe et obturé par un bouchon.The invention is also characterized in that each of the abovementioned sections of conduit is respectively connected to the ramp by a hole internal aligned with a hole opening on the outside of the ramp and closed by a plug.

Selon une autre caractéristique, chaque trou interne de la rampe à un diamètre propre et choisi pour optimiser la répartition des gaz d'échappement recyclés entre les différents conduits d'admission du moteur.According to another characteristic, each internal hole of the ramp has its own diameter and chosen to optimize the distribution of the recycled exhaust gases between the various engine intake ducts.

On précisera ici que le support précité est une pièce de fonderie coulée sous pression.It will be specified here that the aforementioned support is a foundry casting part.

Selon encore une autre caractéristique, les éléments précités sont des chapeaux de paliers d'arbre à cames, venus de matière avec le support précité.According to yet another characteristic, the aforementioned elements are camshaft bearing caps, integrally formed with the aforementioned support.

Le dispositif est aussi caractérisé en ce que la rampe est raccordée à un collecteur d'échappement par l'intermédiaire d'une vanne de répartition.The device is also characterized in that the ramp is connected to an exhaust manifold via a distribution valve.

En outre, l'invention se caractérise en ce que la vanne de répartition précitée est reliée à la rampe à l'aide d'un tube légèrement flexible connecté sensiblement au milieu de la rampe à un raccord cylindrique intégré au support.In addition, the invention is characterized in that the aforementioned distribution valve is connected to the ramp by means of a slightly flexible tube connected substantially in the middle of the ramp to a cylindrical connection integrated in the support.

Mais d'autres caractéristiques et avantages de l'invention ressortiront mieux de la description détaillée d'un mode de réalisation, donné uniquement à titre d'exemple, qui suit et se réfère aux dessins annexés, dans lesquels :

  • La figure 1 est une vue partiellement en coupe transversale de la partie supérieure d'un moteur équipé du dispositif de recyclage conforme à l'invention.
  • La figure 2 est une vue partielle en perspective du moteur de la figure 1.
However, other characteristics and advantages of the invention will emerge more clearly from the detailed description of an embodiment, given solely by way of example, which follows and refers to the appended drawings, in which:
  • Figure 1 is a partially cross-sectional view of the upper part of an engine equipped with the recycling device according to the invention.
  • FIG. 2 is a partial perspective view of the motor in FIG. 1.

En se reportant aux figures, on voit la partie haute d'un moteur à combustion interne 1, tel que moteur diesel par exemple pour véhicule automobile.Referring to the figures, we can see the upper part of an internal combustion engine 1, such as a diesel engine for example for a motor vehicle.

La référence numérique 11 désigne la culasse du moteur 1. La culasse 11 est une pièce de fonderie à l'intérieur de laquelle sont formés ou agencés quatre conduits d'admission 12 et quatre conduits d'échappement 14 du moteur 1.The reference numeral 11 designates the cylinder head of the engine 1. The cylinder head 11 is a foundry piece inside which are formed or arranged four intake ducts 12 and four exhaust ducts 14 of the engine 1.

Ici, chacun des cylindres (non représentés) du moteur 1 communique avec l'un des conduits d'admission 12 et l'un des conduits d'échappement 14, afin de respectivement raccorder ce cylindre à un système d'admission 20 de gaz "frais" et à un système d'échappement 40 des gaz brûlés à l'intérieur de ce cylindre.Here, each of the cylinders (not shown) of the engine 1 communicates with one of the intake ducts 12 and one of the exhaust ducts 14, in order to respectively connect this cylinder to a gas intake system 20 " fresh "and to an exhaust system 40 for the burnt gases inside this cylinder.

De plus, le moteur 1 comporte un dispositif de recyclage 60 des gaz brûlés provenant du système d'échappement 40. Le dispositif 60 est essentiellement constitué par une rampe formant collecteur 65 pour les gaz à recycler, qui est raccordée d'une part à l'échappement 40 et d'autre part au système d'admission 20 du moteur 1. La rampe 65 est en fait reliée séparément à chacun des conduits d'admission 12, de façon à répartir les gaz à recycler entre les différents cylindres du moteur 1.In addition, the engine 1 includes a device 60 for recycling the burnt gases coming from the exhaust system 40. The device 60 essentially consists of a manifold forming a manifold 65 for the gases to be recycled, which is connected on the one hand to the 'exhaust 40 and on the other hand to the intake system 20 of the engine 1. The ramp 65 is in fact connected separately to each of the intake ducts 12, so as to distribute the gases to be recycled between the different cylinders of the engine 1 .

Conformément à l'invention, la rampe 65 est venue de matière avec un support 50 pour des éléments de paliers 52, aptes à guider un arbre à cames, dont seul l'axe longitudinal de rotation X est visible sur la figure 1.According to the invention, the ramp 65 has come integrally with a support 50 for bearing elements 52, capable of guiding a camshaft, of which only the longitudinal axis of rotation X is visible in FIG. 1.

Suivant l'exemple illustré, le support 50 est une pièce de fonderie obtenue par coulée sous pression d'un matériau métallique tel qu'aluminium, dans laquelle les éléments 52 sont des chapeaux de paliers également venus de fonderie. Le support 50 définit deux plans de joint parallèles 50a, 50b qui s'étendent sur sensiblement toute la longueur (suivant l'axe X) du moteur 1. Le plan de joint 50 b recouvre et vient en appui contre un plan de joint correspondant de la culasse 11. Ainsi, le support 50 auquel la rampe 65 est intégrée, constitue un couvercle de culasse sur le plan de joint supérieur 50a duquel, un capot 13 est monté.According to the example illustrated, the support 50 is a foundry part obtained by pressure casting of a metallic material such as aluminum, in which the elements 52 are bearing caps also coming from foundry. The support 50 defines two parallel joint planes 50a, 50b which extend over substantially the entire length (along the axis X) of the motor 1. The joint plane 50b covers and comes to bear against a corresponding joint plane of the cylinder head 11. Thus, the support 50 in which the ramp 65 is integrated, constitutes a cylinder head cover on the upper joint plane 50a from which a cover 13 is mounted.

La rampe de recyclage 65 définit dans le support 50 une cavité allongée 65a dont la section transversale est sensiblement rectangulaire et qui s'étend latéralement suivant l'axe X, sur presque toute la longueur du moteur 1.The recycling ramp 65 defines in the support 50 an elongated cavity 65a whose cross section is substantially rectangular and which extends laterally along the axis X, over almost the entire length of the motor 1.

On voit sur la figure 1 qu'un tronçon de conduit 62 qui s'étend perpendiculairement aux plans 50a, 50b est formé dans le support 50. En fait, un tel tronçon de conduit 62 traverse le support 50 dans le prolongement de chacun des conduits d'admission 12 de la culasse 11. Ces tronçons 62 sont généralement parallèles et relient chacun des conduits 12 au système d'admission 20 qui est monté sur le capot 13.It can be seen in FIG. 1 that a section of conduit 62 which extends perpendicular to the planes 50a, 50b is formed in the support 50. In fact, such a section of conduit 62 passes through the support 50 in the extension of each of the conduits intake 12 of the cylinder head 11. These sections 62 are generally parallel and connect each of the conduits 12 to the intake system 20 which is mounted on the cover 13.

Chacun de ces tronçons de conduit 62 est respectivement relié à la cavité intérieure 65a de la rampe par un trou interne 63 disposé dans l'alignement ou en regard d'un trou débouchant 64 correspondant. On comprend au vu de la figure 1 que chacun des trous 64 débouche à l'extérieur de la rampe 65 et est formé par le même outil de coupe que le trou interne 63 correspondant. Chacun des trous débouchant 64 est obturé hermétiquement par un bouchon 66, par exemple emmanché à force.Each of these sections of conduit 62 is respectively connected to the internal cavity 65a of the ramp by an internal hole 63 arranged in alignment or opposite a corresponding through hole 64. We understand from Figure 1 that each of the holes 64 opens to the outside of the ramp 65 and is formed by the same cutting tool as the corresponding internal hole 63. Each of the through holes 64 is hermetically sealed by a plug 66, for example force fitted.

Afin d'obtenir une répartition optimale des gaz d'échappement recyclés entre les différents cylindres du moteur 1, les trous internes 63 peuvent avoir des diamètres différents. Le diamètre - et donc la section -de chacun des trous 63 est déterminé en fonction des caractéristiques propres du moteur et de la circulation des gaz dans le dispositif 60.In order to obtain an optimal distribution of the recycled exhaust gases between the different cylinders of the engine 1, the internal holes 63 may have different diameters. The diameter - and therefore the cross-section - of each of the holes 63 is determined as a function of the specific characteristics of the engine and of the gas circulation in the device 60.

Sur les figures on remarque que la rampe 65 fait saillie du bord latéral de la culasse 11 (entre les plans de joint 50a, 50b). Celle-ci présente sensiblement en son milieu suivant la direction de l'axe X, un raccord cylindrique 69 venu de matière avec la rampe 65 et s'étendant en saillie du plan de joint inférieur 50b du support 50. Un tube légèrement flexible 67 par exemple en acier inoxydable est fixé sur le raccord 69 afin de relier la cavité interne 65a à une vanne de répartition 68. Cette vanne 68 permet de diriger vers le dispositif 60 une quantité appropriée de gaz d'échappement à recycler. Pour ce faire, la vanne 68 est raccordée à un collecteur d'échappement 48 dans lequel débouchent les quatre conduits 14 de la culasse 11.In the figures we note that the ramp 65 projects from the lateral edge of the cylinder head 11 (between the joint planes 50a, 50b). The latter has substantially in its middle along the direction of the axis X, a cylindrical connection 69 formed integrally with the ramp 65 and extending projecting from the lower joint plane 50b of the support 50. A slightly flexible tube 67 by example made of stainless steel is fixed on the fitting 69 in order to connect the internal cavity 65a to a valve of distribution 68. This valve 68 makes it possible to direct an appropriate quantity of exhaust gas to be recycled to the device 60. To do this, the valve 68 is connected to an exhaust manifold 48 into which the four conduits 14 of the cylinder head 11 open.

On remarquera ici que le tube 67 qui relie la rampe 65 et la vanne de répartition 68 comporte des soufflets grâce auxquels la forme du tube 67 peut être adaptée à la position relative du raccord 69 de la rampe et de la vanne 68.It will be noted here that the tube 67 which connects the ramp 65 and the distribution valve 68 has bellows by which the shape of the tube 67 can be adapted to the relative position of the connector 69 of the ramp and of the valve 68.

On a donc obtenu conformément à l'invention un dispositif semi-intégré 60 grâce auquel une partie des gaz d'échappement provenant des conduits 14 du moteur 1 sont réintroduits vers les conduits d'admission 12 de ce moteur, afin de réduire les émissions d'oxydes d'azote en mélangeant ces gaz d'échappement à l'air fourni au moteur 1 par le système d'admission 20.We therefore obtained in accordance with the invention a semi-integrated device 60 by which a portion of the exhaust gases from the ducts 14 of the engine 1 are reintroduced to the intake ducts 12 of this engine, in order to reduce the emissions of nitrogen oxides by mixing these exhaust gases with the air supplied to the engine 1 by the intake system 20.

Evidemment, l'invention n'est nullement limitée au mode de réalisation qui vient d'être décrit mais comprend tous les équivalents des moyens techniques décrits ainsi que leurs combinaisons.Obviously, the invention is in no way limited to the embodiment which has just been described but includes all the equivalents of the technical means described as well as their combinations.

Claims (7)

  1. Device for the recycling of the exhaust gases of an internal combustion engine (1) of the type in which a manifold (65) connected to the exhaust (40) of the engine (1) is separately connected to several intake ducts (12) formed in the cylinder head (11) of this engine, characterized in that the manifold (65) is made integral in one piece of material with a support (50) which comprises elements (52) of camshaft bearings and which covers the cylinder head (11), duct sections (62) extending through the support (50) in the extension of the intake ducts (12) of the cylinder head (11).
  2. Device according to claim 1, characterized in that each one of the aforesaid duct sections (62) is respectively connected to the manifold (65) by an inner hole (63) aligned with an opening hole (64) which connects the manifold (65a) to the outside and which is closed by a plug (66).
  3. Device according to claim 2, characterized in that each inner hole (63) of the manifold has an own diameter selected to optimize the distribution of the exhaust gases recycled between the different intake ducts (12) of the engine (1).
  4. Device according to one of the claims 1 to 3, characterized in that the aforesaid support (50) is a casting molded under pressure.
  5. Device according to claim 4, characterized in that the aforesaid elements (52) are camshaft bearing caps made integral in one piece of material with the aforesaid support (50).
  6. Device according to one of claims 1 to 5, characterized in that the manifold (65) is connected to an exhaust manifold (48) through the medium of a valve (68) for the distribution of the exhaust gases.
  7. Device according to claim 6, characterized in that the aforesaid distribution valve (68) is connected to the manifold (65) with the assistance of a slightly flexible tube connected substantially in the middle of the manifold (65) to a cylindrical connector fitting integrated into the support (50).
EP93400837A 1992-04-09 1993-03-31 Integrated rail device for the exhaust gas recirculation of an internal combustion engine Expired - Lifetime EP0565410B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9204363 1992-04-09
FR9204363A FR2689936B1 (en) 1992-04-09 1992-04-09 INTEGRATED RAMP DEVICE FOR THE RECYCLING OF EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE.

Publications (2)

Publication Number Publication Date
EP0565410A1 EP0565410A1 (en) 1993-10-13
EP0565410B1 true EP0565410B1 (en) 1995-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400837A Expired - Lifetime EP0565410B1 (en) 1992-04-09 1993-03-31 Integrated rail device for the exhaust gas recirculation of an internal combustion engine

Country Status (3)

Country Link
EP (1) EP0565410B1 (en)
DE (1) DE69300649T2 (en)
FR (1) FR2689936B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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US7069894B2 (en) 2004-04-24 2006-07-04 Mann & Hummel Gmbh Intake manifold having intake pipes linked by transverse acoustic synchronization channels with exhaust gas recirculation inlets

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Publication number Priority date Publication date Assignee Title
DE4445490A1 (en) * 1994-12-20 1996-06-27 Audi Ag Device for exhaust gas detoxification on an internal combustion engine
DE19701873C1 (en) * 1997-01-21 1998-06-04 Daimler Benz Ag Retainer for exhaust gas recirculation conduit
DE10354129A1 (en) * 2003-11-19 2005-06-23 Mahle Filtersysteme Gmbh Intake system for an internal combustion engine
JP4074860B2 (en) * 2004-03-19 2008-04-16 株式会社クボタ Vertical multi-cylinder diesel engine
DE102004015487A1 (en) * 2004-03-26 2005-10-13 Deutz Ag Internal combustion engine has exhaust gas cooler including cooling housing which at least in one section is integral component part of crankcase
DE102005059007A1 (en) 2005-12-08 2007-07-05 Deutz Ag Exhaust gas recirculation in an air-cooled internal combustion engine
EP2129888B1 (en) 2007-03-23 2012-10-31 Behr GmbH & Co. KG Charging fluid suction module and internal combustion engine
EP2055530B1 (en) 2007-10-31 2012-08-08 U-Shin Ltd. Motor-driven actuator
CN109372670B (en) * 2018-12-21 2023-09-19 潍柴动力股份有限公司 Integrated pipeline and engine

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Publication number Priority date Publication date Assignee Title
JPH0350283Y2 (en) * 1985-04-09 1991-10-28
KR900000143B1 (en) * 1985-10-04 1990-01-20 마쯔다 가부시기가이샤 Induction system for v-type internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7069894B2 (en) 2004-04-24 2006-07-04 Mann & Hummel Gmbh Intake manifold having intake pipes linked by transverse acoustic synchronization channels with exhaust gas recirculation inlets

Also Published As

Publication number Publication date
DE69300649T2 (en) 1996-04-18
FR2689936A1 (en) 1993-10-15
EP0565410A1 (en) 1993-10-13
DE69300649D1 (en) 1995-11-23
FR2689936B1 (en) 1994-07-08

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