FR2855221A1 - Inlet manifold for supercharged i.c. engine has ends of primary ducts connected directly to plenum chamber of inlet pipe - Google Patents

Inlet manifold for supercharged i.c. engine has ends of primary ducts connected directly to plenum chamber of inlet pipe Download PDF

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Publication number
FR2855221A1
FR2855221A1 FR0305965A FR0305965A FR2855221A1 FR 2855221 A1 FR2855221 A1 FR 2855221A1 FR 0305965 A FR0305965 A FR 0305965A FR 0305965 A FR0305965 A FR 0305965A FR 2855221 A1 FR2855221 A1 FR 2855221A1
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France
Prior art keywords
intake
primary
engine
duct
plenum chamber
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Granted
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FR0305965A
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French (fr)
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FR2855221B1 (en
Inventor
Denis Garro
Alain Gabriel Lefebvre
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Renault SAS
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Renault SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10098—Straight ducts
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026—Plenum chambers
    • F02M35/10032—Plenum chambers specially shaped or arranged connecting duct between carburettor or air inlet duct and the plenum chamber; specially positioned carburettors or throttle bodies with respect to the plenum chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10327—Metals; Alloys
    • 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
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation
    • 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
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1812—Number of cylinders three
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

The manifold consists of an inlet pipe (24) entering a plenum chamber (28) that has the ends (18, 20, 22) of a series of primary ducts (12, 14, 16) connected directly to it and forming the plenum chamber itself, the dimensions of the primary duct and inlet pipe cross-sections being more or less the same. The free ends of each of the primary ducts divides into two branches (36. 38), each corresponding to an engine cylinder inlet valve.

Description

Répartiteur d'admission pour moteur à combustion interne suralimentéIntake distributor for supercharged internal combustion engine

La présente invention se rapporte à un répartiteur d'admission adapté aux moteurs à combustion interne suralimentés.  The present invention relates to an intake manifold suitable for supercharged internal combustion engines.

Un domaine d'application envisagé est notamment celui des nmoteurs de véhicule automobile pour lesquels on cherche à améliorer sans cesse le rendement à tout régime.  A field of application envisaged is notably that of motor vehicle engines for which it is sought to continuously improve the performance at any speed.

Un moyen d'augmenter le rendement des moteurs, qu'ils fonctionnent avec un allumage commandé ou par auto-allumage, est de o10 les suralimenter en comprimant le mélange combustible au moyen d'un turbocompresseur.  One way to increase the efficiency of engines, whether they operate with spark ignition or by self-ignition, is to boost them by compressing the fuel mixture using a turbocharger.

Le mélange est comprimé dans le conduit d'admission du répartiteur d'admission, ledit conduit d'admission débouchant dans l'extrémité d'un plénum qui s'étend longitudinalement, au-dessus de la culasse du moteur 15 au regard des cylindres; chaque cylindre est raccordé audit plénum par un conduit primaire qui débouche dans le cylindre au regard d'une soupape d'admission.  The mixture is compressed in the intake duct of the intake manifold, said intake duct opening into the end of a plenum which extends longitudinally, above the cylinder head of the engine 15 facing the cylinders; each cylinder is connected to said plenum by a primary conduit which opens into the cylinder with respect to an intake valve.

Les conduits primaires sont alors raccordés sensiblement perpendiculairement audit plénum et parallèlement entre eux, du conduit 20 d'admission jusqu'à l'extrémité du plénum.  The primary conduits are then connected substantially perpendicular to said plenum and parallel to each other, from the intake conduit 20 to the end of the plenum.

Ainsi, en comprimant le mélange combustible au moyen du turbocompresseur dans le conduit d'admission, il est injecté sous pression dans chaque cylindre lorsque les soupapes d'admission libèrent leur siège de soupape.  Thus, by compressing the fuel mixture by means of the turbocharger in the intake duct, it is injected under pressure into each cylinder when the intake valves release their valve seats.

Un problème qui se pose et que vise à résoudre la présente invention est de fournir un répartiteur d'admission qui permette d'améliorer les performances du moteur non seulement à haut régime, mais aussi à bas régime tout en conférant des performances au moins identiques aux autres régimes. Le régime moteur correspond ici à la 30 vitesse de rotation du vilebrequin du moteur.  A problem which arises and which the present invention aims to solve is to provide an intake distributor which makes it possible to improve the performance of the engine not only at high speed, but also at low speed while giving performance at least identical to other plans. The engine speed here corresponds to the speed of rotation of the engine crankshaft.

Dans ce but, la présente invention propose un répartiteur d'admission adapté aux moteurs à combustion interne suralimentés, comportant un conduit d'admission débouchant dans un plénum auquel sont raccordées les extrémités d'une pluralité de conduits primaires, lesdites extrémités étant raccordées ensemble directement suLr ledit conduit d'admission et la jonction entre lesdites extrémités et ledit conduit d'admission formant ledit plénum.  To this end, the present invention provides an intake manifold suitable for supercharged internal combustion engines, comprising an intake duct opening into a plenum to which the ends of a plurality of primary ducts are connected, said ends being connected together directly on said intake duct and the junction between said ends and said intake duct forming said plenum.

Ainsi, une caractéristique de l'invention réside dans le raccordement radial direct des conduites primaires sur le conduit d'admission de façon à réduire au maximum le volume nécessaire au transfert du mélange combustible, du turbocompresseur vers les cylindres; le volume du 10 plénum correspondant désormais, à la jonction des extrémités des conduits primaires et du conduit d'admission, ce qui réduit considérablement son volume par rapport aux plénums de l'art antérieur.  Thus, a characteristic of the invention resides in the direct radial connection of the primary pipes on the intake pipe so as to minimize the volume necessary for the transfer of the fuel mixture, from the turbocharger to the cylinders; the volume of the plenum now corresponding, at the junction of the ends of the primary ducts and the intake duct, which considerably reduces its volume compared to the plenums of the prior art.

De la sorte, d'une part l'alimentation du moteur est réalisée de manière symétrique sur les cylindres qui le constituent et d'autre part, le remplissage naturel du moteur est augmenté. De ce fait, le rendement du moteur est augmenté globalement, non seulement à bas régime par rapport aux moteurs comportant des répartiteurs selon l'art antérieur et dont le couple est généralement faible à bas régime, mais aussi à haut régime.  In this way, on the one hand the supply of the engine is carried out symmetrically on the cylinders which constitute it and on the other hand, the natural filling of the engine is increased. As a result, the engine efficiency is increased overall, not only at low speed compared to motors comprising distributors according to the prior art and whose torque is generally low at low speed, but also at high speed.

Préférentiellement, les dimensions des sections droites desdites extrémités et dudit conduit d'admission sont sensiblement égales. Ainsi, le mélange combustible est uniformément réparti dans les conduits primaires, la pression étant sensiblement équivalente dans chaque conduit primaire.  Preferably, the dimensions of the cross sections of said ends and of said intake duct are substantially equal. Thus, the combustible mixture is uniformly distributed in the primary conduits, the pressure being substantially equivalent in each primary conduit.

Selon un mode de mise en oeuvre de l'invention particulièrement avantageux, lesdits conduits primaires se divisent en deux branches, chacune correspondant à une soupape d'admission. De la sorte, le mélange combustible injecté dans le conduit primaire est divisé en deux parties, chacune étant parfaitement guidée vers une ouverture 30 correspondant à une soupape d'admission du cylindre.  According to a particularly advantageous embodiment of the invention, said primary conduits are divided into two branches, each corresponding to an intake valve. In this way, the fuel mixture injected into the primary conduit is divided into two parts, each being perfectly guided towards an opening 30 corresponding to a cylinder intake valve.

Selon un autre mode de mise en oeuvre de l'invention particulièrement avantageux, I'axe dudit conduit d'admission est contenu dans un plan de symétrie dudit répartiteur d'admission. Ainsi, grâce à cette caractéristique, le mélange combustible s'écoule dans le répartiteur d'admission avec des pertes de charges réduites, de sorte que la puissance du turbocompresseur est essentiellement utilisée à comprimer le mélange combustible dans les cylindres.  According to another particularly advantageous embodiment of the invention, the axis of said intake duct is contained in a plane of symmetry of said intake manifold. Thus, thanks to this characteristic, the fuel mixture flows into the intake distributor with reduced pressure drops, so that the power of the turbocharger is essentially used to compress the fuel mixture in the cylinders.

Avantageusement, le répartiteur d'admission conforme à l'invention comprend trois conduits primaires, alimentant chacun un cylindre.  Advantageously, the intake manifold according to the invention comprises three primary conduits, each supplying a cylinder.

D'autres particularités et avantages de l'invention ressortiront à la lecture de la description faite ci-après d'un mode de réalisation particulier 10 de l'invention, donné à titre indicatif mais non limitatif, en référence aux dessins annexés sur lesquels: - la Figure 1 est une vue schématique en élévation de dessus d'un répartiteur d'admission conforme à l'invention; et, - la Figure 2 est une vue schématique en perspective du répartiteur d'admission illustré sur la Figure 1.  Other features and advantages of the invention will emerge on reading the description given below of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the appended drawings in which: - Figure 1 is a schematic elevational view from above of an intake manifold according to the invention; and, - Figure 2 is a schematic perspective view of the intake manifold illustrated in Figure 1.

La Figure 1 i llustre u n répartiteur d'admission 1 0 vue d e d essus, présentant trois conduits primaires sensiblement de même section droite, un conduit primaire central 12 situé entre deux conduits primaires périphériques 14, 1 6, symétriques Il'un de l'autre par rapport a u conduit 20 primaire central 12.  Figure 1 i llustrates an intake manifold 1 0 seen from above, having three primary conduits of substantially the same cross section, a central primary conduit 12 located between two peripheral primary conduits 14, 1 6, symmetrical to one another relative to the central primary duct 20 12.

Les conduits primaires 12, 14, 16 présentent respectivement des premières extrémités 18, 20, 22 raccordées radialement et directement à un conduit d'admission 24, de même section que les conduits primaires par l'intermédiaire d'une jonction 26 formant chambre 28 et qui 25 correspond au plénum du répartiteur d'admission. En outre, les conduites primaires 12, 14, 16 présentent respectivement des secondes extrémités 30, 32, 34, chacune divisée en deux parties 36, 38 raccordées aux cylindres correspondants 40 que la culasse 42 recouvre.  The primary conduits 12, 14, 16 respectively have first ends 18, 20, 22 connected radially and directly to an intake conduit 24, of the same section as the primary conduits via a junction 26 forming a chamber 28 and which corresponds to the plenum of the intake manifold. In addition, the primary pipes 12, 14, 16 respectively have second ends 30, 32, 34, each divided into two parts 36, 38 connected to the corresponding cylinders 40 that the cylinder head 42 covers.

Les deux parties 36, 38 sont raccordées de façon hermétique 30 chacune à un alésage pratiqué dans le cylindre qu'une soupape d'admission est adaptée à venir obturer.  The two parts 36, 38 are hermetically connected 30 each to a bore formed in the cylinder which an inlet valve is adapted to close.

Ainsi, le répartiteur d'admission 10 est destiné à être alimenté par un turbocompresseur, non représenté, susceptible d'être raccordé de manière hermétique au conduit d'admission 24. De la sorte, le mélange combustible est injecté sous pression dans les cylindres 40 par I'intermédiaire du répartiteur d'admission 10.  Thus, the intake distributor 10 is intended to be supplied by a turbocharger, not shown, capable of being hermetically connected to the intake duct 24. In this way, the fuel mixture is injected under pressure into the cylinders 40 through the intake dispatcher 10.

On retrouve sur la Figure 2, le répartiteur d'admission 10 en perspective.  Found in Figure 2, the intake manifold 10 in perspective.

Les conduits primaires 12, 14, 16 définissent un plan moyen P qui les coupe en leur centre et qui coupe également lesdites parties 36, 38 10 des secondes extrémités respectives 30, 32, 34.  The primary conduits 12, 14, 16 define a mean plane P which cuts them in their center and which also cuts said parts 36, 38 10 of the respective second ends 30, 32, 34.

En outre, le répartiteur d'admission présente un plan de symétrie V, perpendiculaire au plan P et qui coupe axialement le conduit primaire central 12 et le conduit d'admission 24; les deux conduits primaires périphériques 14, 16 étant l'image l'un de l'autre par rapport au plan de 15 symétrie V. Alors que le conduit primaire central 12 s'étend longitudinalement, et que son extrémité débouche dans la chambre 28 au regard du conduit d'admission 24, les deux autres conduits primaires périphériques 14, 16 dont les secondes extrémités 32, 34 sont sensiblement parallèles entre elles et à la seconde extrémité 30 du 20 conduit primaire central 16, présentent chacun une portion coudée 44, 46 opposée l'une de l'autre, de façon que leur première extrémité 20, 22 débouche dans la chambre 28 sensiblement en regard l'une de l'autre à la jonction 26 entre le conduit d'admission 24 et le conduit primaire central 12.  In addition, the intake manifold has a plane of symmetry V, perpendicular to the plane P and which axially cuts the central primary duct 12 and the intake duct 24; the two peripheral primary conduits 14, 16 being the image of each other with respect to the plane of symmetry V. While the central primary conduit 12 extends longitudinally, and its end opens into the chamber 28 at with regard to the intake duct 24, the two other peripheral primary ducts 14, 16 whose second ends 32, 34 are substantially parallel to one another and to the second end 30 of the central primary duct 16, each have a bent portion 44, 46 opposite one another, so that their first end 20, 22 opens into the chamber 28 substantially opposite one another at the junction 26 between the intake duct 24 and the central primary duct 12 .

Ainsi, le volume de la chambre 28 est relativement faible et sensiblement équivalent à un volume cubique dont la longueur d'une arête correspond au diamètre maximal de la section droite du conduit d'admission 24. En outre, le volume du plénum ainsi obtenu est inférieur à une fois et demie la cylindrée unitaire du moteur. Cette dernière 30 correspond au volume balayé par le piston dans le cylindre de diamètre D, c'est-à-dire au produit de la course dudit piston par la surface définie par le diamètre dudit cylindre: c.D/4.  Thus, the volume of the chamber 28 is relatively small and substantially equivalent to a cubic volume whose length of an edge corresponds to the maximum diameter of the cross section of the intake duct 24. In addition, the volume of the plenum thus obtained is less than 1.5 times the unit displacement of the engine. The latter 30 corresponds to the volume swept by the piston in the cylinder of diameter D, that is to say to the product of the stroke of said piston by the area defined by the diameter of said cylinder: c.D / 4.

De la sorte, lorsque le turbocompresseur comprime le mélange combustible dans le conduit d'admission 24, ledit mélange comblustible est distribué de façon symétrique dans chacun des conduits primaires 12, 14, 16 à partir de la chambre 28 sans perte de charge excessive. Par 5 ailleurs, la longueur des conduits primaires peut être adaptée pour obtenir des g ains à d ifférents régimes. C es g ains s ont n on s eulement l iés à l a longueur des conduits primaires utilisés, mais aussi à la ligne d'admission 24 située en amont du plénum.  In this way, when the turbocharger compresses the fuel mixture in the intake duct 24, said combustible mixture is distributed symmetrically in each of the primary ducts 12, 14, 16 from the chamber 28 without excessive pressure drop. Furthermore, the length of the primary conduits can be adapted to obtain gains at different speeds. These are only related to the length of the primary conduits used, but also to the intake line 24 located upstream of the plenum.

Grâce à cette configuration de répartiteur d'admission dont le volume 1o global intérieur est moindre que celui des répartiteurs de l'art antérieur, on obtient une augmentation du rendement global d'un moteur à essence présentant trois cylindres et qui en est équipé, situé entre 1 et 40/o à bas régime, par exemple 2% à 1750 tr/min et situé entre 2 et 7% à haut régime, par exemple 3% à 4250 tr/min.  Thanks to this configuration of the intake distributor, the overall internal volume of which is less than that of the distributors of the prior art, there is an increase in the overall efficiency of a gasoline engine having three cylinders and which is equipped with it, located between 1 and 40 / o at low speed, for example 2% at 1750 rpm and located between 2 and 7% at high speed, for example 3% at 4250 rpm.

En outre, dans l'exemple précité, les rendements du moteur, avec un répartiteur d'admission conforme à l'invention, sont non seulement supérieurs aux rendements du moteur avec un répartiteur traditionnel, à 1750 et à 4250 tr/min mais ils sont aussi supérieurs dans des régimes voisins encadrant ces deux valeurs, entre 1500 et 2000 tr/min pour le 20 premier et entre 3500 et 5000 tr/min pour le deuxième.  Furthermore, in the above example, the engine outputs, with an intake distributor according to the invention, are not only higher than the engine outputs with a traditional distributor, at 1750 and 4250 rpm but they are also higher in neighboring regimes framing these two values, between 1500 and 2000 rpm for the first and between 3500 and 5000 rpm for the second.

Bien évidemment, le répartiteur d'admission conforme à l'invention n'est pas seulement adapté aux moteurs à essence présentant trois cylindres, mais aussi aux moteurs de type Diesel pour lesquels la combustion s'effectue par auto-allumage.  Obviously, the intake manifold according to the invention is not only suitable for petrol engines having three cylinders, but also for diesel type engines for which the combustion takes place by self-ignition.

En outre, le répartiteur d'admission conforme à l'invention est adapté à d'autres types de moteurs à combustion interne présentant par exemple quatre cylindres et auquel cas il présente quatre conduits primaires.  In addition, the intake manifold according to the invention is suitable for other types of internal combustion engines having for example four cylinders and in which case it has four primary ducts.

Encore d'autres types de moteur présentent une seule soupape d'admission et dans ce cas la seconde extrémité des conduits primaires 30 ne présente qu'une seule partie correspondant à une soupape d'admission.  Still other types of engine have a single intake valve and in this case the second end of the primary conduits 30 has only one part corresponding to an intake valve.

Par ailleurs, le répartiteur d'admission est adapté à être moulé d'une seule pièce en matière métallique du type acier ou aluminium et également à être moulé dans des matières plastiques adaptées à résister à des conditions thermiques élevées.  Furthermore, the intake manifold is adapted to be molded in a single piece of metallic material of the steel or aluminum type and also to be molded in plastics adapted to withstand high thermal conditions.

Claims (5)

REVENDICATIONS 1. Répartiteur d'admission adapté aux moteurs à combustion interne suralimentés, comportant un conduit d'admission (24) débouchant 5 dans un plénum (28) auquel sont raccordées les extrémités (18, 20, 22) d'une pluralité de conduits primaires (12, 14, 16), caractérisé en ce que lesdites extrémités (18, 20, 22) sont raccordées ensemble directement sur ledit conduit d'admission (24), la jonction entre lesdites extrémités (18, 20, 22) et ledit conduit d'admission (24) formant ledit plénum.  1. Intake distributor adapted to supercharged internal combustion engines, comprising an intake duct (24) opening 5 into a plenum (28) to which the ends (18, 20, 22) of a plurality of primary ducts are connected (12, 14, 16), characterized in that said ends (18, 20, 22) are connected together directly on said intake duct (24), the junction between said ends (18, 20, 22) and said duct intake (24) forming said plenum. 2. Répartiteur d'admission selon la revendication 1, caractérisé en ce que les dimensions des sections droites desdites extrémités (18, 20, 22) et dudit conduit d'admission (24) sont sensiblement égales.  2. Intake distributor according to claim 1, characterized in that the dimensions of the cross sections of said ends (18, 20, 22) and of said intake duct (24) are substantially equal. 3. Répartiteur d'admission selon la revendication 1 ou 2, caractérisé en ce que lesdits conduits primaires (12,14, 16) se divisent en 15 deux branches (36, 38), chacune correspondant à une soupape d'admission.  3. Intake distributor according to claim 1 or 2, characterized in that said primary conduits (12, 14, 16) are divided into two branches (36, 38), each corresponding to an intake valve. 4. Répartiteur d'admission selon l'une quelconque des revendications 1 à 3, caractérisé ce que l'axe dudit conduit d'admission (24) est contenu dans un plan de symétrie (P) dudit répartiteur 20 d'admission (10).  4. Intake distributor according to any one of claims 1 to 3, characterized in that the axis of said intake duct (24) is contained in a plane of symmetry (P) of said intake distributor (10) . 5. Répartiteur d'admission selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend trois conduits primaires (12, 14, 16).  5. Intake distributor according to any one of claims 1 to 4, characterized in that it comprises three primary conduits (12, 14, 16).
FR0305965A 2003-05-19 2003-05-19 ADMISSION DISTRIBUTOR FOR SUPERIOR INTERNAL COMBUSTION ENGINE. Expired - Fee Related FR2855221B1 (en)

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FR2931207A1 (en) * 2008-05-14 2009-11-20 Renault Sas Gas e.g. intake gas, transferring device for internal combustion engine, has separated ducts joined in main duct opening in gas manifold, where overall sectional surface of ducts is constant during passage from main duct to separated ducts
DE102014208726A1 (en) * 2014-05-09 2015-11-12 Ford Global Technologies, Llc Auto-ignition internal combustion engine with intake system comprising a Gesamtansaugleitung
DE102014208723A1 (en) * 2014-05-09 2015-11-12 Ford Global Technologies, Llc Internal combustion engine with at least one cylinder head and method for producing a cylinder head of such an internal combustion engine
DE102009050952B4 (en) * 2009-10-28 2017-11-30 Daimler Ag Exhaust tract with an exhaust manifold and with a cylinder head

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JPH10122069A (en) * 1996-10-15 1998-05-12 Daihatsu Motor Co Ltd Inertia supercharging type intake system in multi-cylinder internal combustion engine
GB2321671A (en) * 1997-01-31 1998-08-05 Perkins Ltd I.c. engine inlet manifold with branches of equal length

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US5209191A (en) * 1990-12-03 1993-05-11 Filterwerk Mann & Hummel Gmbh Air intake manifold for an internal combustion engine
JPH10122069A (en) * 1996-10-15 1998-05-12 Daihatsu Motor Co Ltd Inertia supercharging type intake system in multi-cylinder internal combustion engine
GB2321671A (en) * 1997-01-31 1998-08-05 Perkins Ltd I.c. engine inlet manifold with branches of equal length

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2931207A1 (en) * 2008-05-14 2009-11-20 Renault Sas Gas e.g. intake gas, transferring device for internal combustion engine, has separated ducts joined in main duct opening in gas manifold, where overall sectional surface of ducts is constant during passage from main duct to separated ducts
DE102009050952B4 (en) * 2009-10-28 2017-11-30 Daimler Ag Exhaust tract with an exhaust manifold and with a cylinder head
DE102014208726A1 (en) * 2014-05-09 2015-11-12 Ford Global Technologies, Llc Auto-ignition internal combustion engine with intake system comprising a Gesamtansaugleitung
DE102014208723A1 (en) * 2014-05-09 2015-11-12 Ford Global Technologies, Llc Internal combustion engine with at least one cylinder head and method for producing a cylinder head of such an internal combustion engine
DE102014208723B4 (en) 2014-05-09 2022-02-17 Ford Global Technologies, Llc Internal combustion engine with at least one cylinder head
DE102014208726B4 (en) 2014-05-09 2022-03-31 Ford Global Technologies, Llc Self-igniting internal combustion engine with an intake system comprising an overall intake line

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