EP3707365A1 - Air intake device for a heat engine - Google Patents

Air intake device for a heat engine

Info

Publication number
EP3707365A1
EP3707365A1 EP18789165.0A EP18789165A EP3707365A1 EP 3707365 A1 EP3707365 A1 EP 3707365A1 EP 18789165 A EP18789165 A EP 18789165A EP 3707365 A1 EP3707365 A1 EP 3707365A1
Authority
EP
European Patent Office
Prior art keywords
air intake
cylinder head
air
receptacle
circuit
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Withdrawn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
EP18789165.0A
Other languages
German (de)
French (fr)
Inventor
Thomas VENEZIANI
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP3707365A1 publication Critical patent/EP3707365A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02M35/10242—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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • 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
    • 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
    • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • 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
    • F02M35/10072—Intake runners
    • 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
    • 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
    • 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
    • F02M35/1034—Manufacturing and assembling intake systems
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an air intake circuit for a heat engine or an internal combustion engine.
  • the invention also relates to a heat engine comprising such an air intake circuit.
  • the invention relates to a motor vehicle comprising such an air intake circuit or such a heat engine.
  • an air compression element in the engine air intake circuit in order to increase the pressure of the admitted gases and allow a better filling of the engine cylinders. in an air / fuel mixture, which leads to increase the power density of the engine and thus to increase its power or reduce the engine consumption.
  • This compression element may be an electric compressor or a compressor of a turbocharger, arranged between an air filter and an air intake manifold of the engine. The air is thus captured from a front face of the vehicle, then passes successively through the filter, the compression element, an intake manifold before entering the engine through air intake ducts dug in a cylinder head .
  • a heat exchanger is arranged in the air intake circuit, between the compression element and the engine intake manifold, to cool the compressed air that enters the engine. the combustion chambers.
  • the air intake manifold includes a throttle body, a volume of air buffer, also called plenum, and at least as many air intake lines as cylinders.
  • the air intake manifold also referred to as the air intake manifold, may be for example a casting or a plastic part fixed against the cylinder head.
  • the intake manifold and intake manifolds are capable of generating aerodynamic turbulence in the combustion chamber to ideally mix gasoline with air for efficient combustion.
  • the geometry and orientation of the air intake ducts relative to the combustion chamber play a vital role.
  • the air intake distributor and the heat exchanger are fixed on the engine, in particular on a wall of the cylinder head, which substantially increases the size of the engine.
  • reducing the weight of the engine is important in order to reduce the consumption and emissions of pollutants such as carbon oxides.
  • pollutants such as carbon oxides.
  • said cylinder wall can be a wall of the plenum of a distributor.
  • US3949715-A discloses a cylinder head having a plenum of an air intake manifold. Said plenum is part of the cylinder head which increases the volume of the cylinder head and therefore the weight thereof.
  • the object of the invention is to provide an air intake circuit for a thermal, gasoline or diesel engine, overcoming the above drawbacks and improving the heat engine air intake circuits known from the prior art.
  • the invention makes it possible to provide an air intake circuit for a heat engine comprising such an air intake circuit which is compact, easy to assemble and minimizes the weight of said circuit, optimizing air circulation. , and which make it possible to limit the losses of load of the air flows.
  • the invention relates to an air intake circuit for a heat engine, said air intake circuit being intended to be positioned between an air compression element and at least one upper part of the air chamber. combustion excavated in a cylinder head of the engine, said air intake circuit comprising the cylinder head, an air intake distributor, and at least one intake duct,
  • the circuit comprises at least one concave receptacle facing outwardly of the motor, housed in a recess of the breech, and connected with a tubular member recessed into the at least one air intake duct.
  • the receptacle and the tubular element form a device for directing the intake air directly into the intake ducts dug in the cylinder head. They can therefore replace the formation of a complex cylinder head including the cavity of said cylinder head to collect and direct the air flow to the intake ducts of the cylinder head.
  • the receptacle is surrounded by a radial flange for abutting against a wall of the cylinder head.
  • the radial flange allows a point of attachment of the receptacle vis-à-vis the cylinder head.
  • the tubular element connected to the receptacle is conical.
  • the tubular element connected to the receptacle is conical to allow an acceleration of the intake air flow at its entry into the combustion chamber.
  • the receptacle comprises a deflecting wall for directing an air flow towards an opening connected with the tubular element.
  • the receptacle comprises a deflecting wall for directing an air flow towards an opening connected to the tubular element; its shape is optimized to direct the flow of intake air.
  • the wall of the tubular element comprises an annular channel vis-à-vis with the at least one air intake duct for receiving a seal.
  • the tubular element comprises a seal to prevent any backflow of intake air into existing cavities in the cylinder head.
  • the radial rim of the receptacle comprises a sealing member vis-à-vis with the cylinder head mounting wall.
  • the sealing member is in a list comprising a lip traversing the contour of the flange, a seal housed between the radial flange and the yoke fixing wall.
  • the radial rim of the receptacle comprises a sealing element vis-à-vis the cylinder head.
  • the receptacle is made of plastic.
  • the receptacle is made of plastic which allows a reduction in weight.
  • the receptacle is remote from the wall of the cavity of the cylinder head.
  • the receptacle is remote from the wall of the cavity of the cylinder head, the recess of the cavity is greater than the volume of the receptacle.
  • the recess of the cylinder head to form the cavity can therefore be optimized for a significant reduction in weight.
  • the receptacle, the radial rim and the tubular element are in one piece.
  • the receptacle, the radial flange and the tubular element are in one piece, which facilitates the manufacture while allowing an improvement in the rigidity of the assembly.
  • the distributor comprises a downstream outlet mouth surrounded radially by a securing sidewalk intended to bear against the radial rim of the receptacle and on the wall for fixing the cylinder head.
  • the radial flange is adapted for the optimal junction of the distributor with the cylinder head.
  • the radial flange, the receptacle and the tubular element are parts of the air intake distributor.
  • the radial flange, the receptacle and the tubular element are part of the air intake distributor, which makes it possible to reduce the number of parts in reference and the number of manipulations for the assembly of the circuit. air intake.
  • FIG 1 is a longitudinal schematic view of a section of an air intake circuit.
  • FIG. 2 is a schematic view of a sectional view of the air intake circuit according to the invention.
  • FIG 3 is a schematic longitudinal sectional view of the air intake circuit according to the invention. Detailed description of the figures
  • the motor vehicles may be equipped with a heat engine 100 or with an internal combustion engine.
  • the heat engine generally comprises a cylinder head surmounting a cylinder block 101, also called “engine block”.
  • the engine includes also an air intake circuit 10 through which air enters the combustion chambers 14 of the engine from the outside.
  • the air is captured from a front of the vehicle and passes through the intake circuit to be injected into the combustion chambers.
  • To improve engine performance it is known to increase the pressure of the admitted gases and allow a better filling of the engine cylinders air / fuel mixture.
  • the power density of the engine is thus increased as well as its power with a reduction of the engine consumption.
  • An intake air compression stage is thus disposed between an air filter and the engine. This compression stage is formed either by the compression part of a turbocharger or by an electric compressor. According to FIG. 1, it is possible to see an upstream cone 102 for connection between the compression stage (not shown) and the air intake circuit 10.
  • the compressed air is then at high temperature and its density is reduced which is detrimental to the engine performance. It is therefore useful to add to said compressor downstream in the direction of flow of air to the compressor a cooling stage of the air.
  • This cooling stage can be composed of a cooler 16 and more precisely of an air / water heat exchanger. Water at moderate temperature passes through the heat exchanger and takes away some of the heat from the compressed air.
  • the air is then directed to an air intake distributor 17 for controlling the air flow admitted into the combustion chambers 14.
  • Said distributor is fixed by a flange 104 to a wall 20 for fixing the engine cylinder head and directs the compressed and cooled air to air intake ducts 12 dug into the cylinder head.
  • Said admission ducts in the cylinder head are of particular shape and profile depending on the type of engine for example diesel fuel or spark ignition.
  • the intake circuit 10 is disposed between a compressor (not shown) and the engine 100 which comprises a cylinder block 101 surmounted by the cylinder head January 1.
  • a compressor not shown
  • the engine 100 which comprises a cylinder block 101 surmounted by the cylinder head January 1.
  • cylinders 103 in which pistons are housed. Said pistons are driven in a sliding movement along the axis of the cylinder back and forth.
  • a combustion chamber is defined for each of the cylinders and is defined by the cylinder, the piston and a bottom wall 13 of the cylinder head.
  • In said lower wall of the cylinder head open the intake ducts 12 whose openings to each of the combustion chambers 14 are closed by controlled valves 15.
  • the cooler 16 and the air intake manifold 17 are in one piece 19.
  • the cooler is also called WCAC acronym for "WCAC" meaning Water Charge Air Cooler for water / air cooler.
  • the distributor is essentially distinguished by a plenum 18 or air reserve chamber before entering the intake ducts 12 of the cylinder head.
  • the distributor and downstream of the exchanger and shares the same housing.
  • Said casing is directly fixed to a wall for fixing the cylinder head.
  • Said fixing wall 20 extends on a plane and has an inclination relative to a horizontal plane shown for example by a joint plane 21 between the cylinder head and the cylinder block. Said inclination allows a simpler cooler installation and a more reliable maintenance.
  • the engine according to the invention comprises at least one cylinder.
  • the yoke 1 1 has a cavity 22 into which opens a primary conduit 23 of air intake. This primary duct is then extended by two secondary ducts 24 which will bring the intake air in two distinct directions in the combustion chamber to obtain a desired swirling or tumbling effect according to the type of fuel engine. diesel or gasoline.
  • the cavity 22 is obtained by molding and the surface state of the wall of the cavity is small.
  • the cylinder head is hollowed out as much as possible taking into account the mechanical rigidity constraints of the cylinder head, around the outlet of the primary conduit 23 intake.
  • a receptacle 25 is disposed in the cavity.
  • the receptacle has a bowl shape with a bend facing the outside of the motor and to the distributor when the distributor is mounted against the cylinder head wall.
  • the receptacle 25 has an opening 30 connected to a substantially tubular element 26.
  • Said tubular element makes it possible to direct the intake air into the primary inlet duct 23 of the cylinder head 1 January.
  • Said tubular element is substantially conical with a reduction of the downstream upstream flow section 28 to accelerate the intake air.
  • the outer section of the downstream end 28 of this tubular element is substantially complementary to the mounting clearance near the passage section of the primary duct 23.
  • the downstream end of the tubular element is surrounded by a sealing piece between the downstream end 28 of the tubular element 26 and the primary inlet duct 23 of the cylinder head, to avoid return air towards the cavity 22 of the cylinder head.
  • This piece can be a sealing lip.
  • this sealing piece is an annular seal 29 received in an annular channel (not shown) facing the wall of the primary duct 23 of the cylinder head and surrounding the downstream end 28 of the tubular element.
  • the annular seal 29 is made of elastomer and has elasticity and damping properties.
  • the receptacle 25 comprises a deflecting wall 31 able to direct the intake air towards the opening 30 connected with the tubular element 26.
  • the deflecting wall 31 as represented in FIG. 3 is for example flat and inclined with respect to the plane horizontal 21 to direct the intake air to the lower part of the receptacle or is disposed the opening 30, once the receptacle mounted in the cylinder head.
  • the receptacle 25 is surrounded by a flange 32 or curb extending radially and intended to abut against the fixing wall 20 of the cylinder head 1 January. Said rim 32 extends on a support plane 34.
  • the volume delimited by the receptacle 25 and the support plane 34 is smaller than the volume delimited by the cavity 22 and the plane of the fixing wall 20 of the cylinder head.
  • the wall of the receptacle 25 is distant from the wall of the cavity 22 of the cylinder head once the receptacle is mounted in the cylinder head. This also allows easy mounting of the receptacle with the tubular element in the cylinder head January 1.
  • said fixing flange comprises a sealing element vis-a-vis with the wall 20 for fixing the cylinder head.
  • Said sealing element is in a list comprising a lip traversing the contour of the flange, a seal housed between the flange and the plane of the wall 20 for fixing the yoke.
  • the fixing flange is formed to be in accordance with the periphery of the intake air distributor.
  • the distributor 17 comprises a downstream air outlet mouth surrounded by a securing sidewalk 33 intended to bear against the fixing flange 32 and against the fixing wall 20 of the cylinder head 1 January.
  • Said fixing flange is therefore interposed between the air distributor 17 and the fixing wall 20 of the cylinder head 1 January.
  • a sealing element is also arranged between the fixing flange 32 and the attachment sidewalk 33 of the distributor.
  • Said sealing member may be in a list comprising a lip traversing the contour of the flange, a seal housed between the flange and the attachment sidewalk 33 of the distributor.
  • the three elements which are the fixing flange 32, the receptacle 25 and the tubular element 26 are derived from the same part obtained by molding and made of plastic and form an interface piece 35 between the distributor 17 and the cylinder head 1 1 to obtain a cylinder head lighter and simpler to manufacture.
  • the editing of the interface includes the following steps:
  • the interface piece 25 directs the flow of intake air from the distributor 17 to the primary conduit 23 of the cylinder head.
  • the annular seal 29 makes it possible, on the one hand, to guarantee non-return of air in the cavity 22 of the cylinder head and, on the other hand, to damp the vibrations generated by the passage of air.
  • the interface piece 35 makes it possible to obtain a cylinder head 1 1 that is simpler to manufacture and also lighter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

An air intake circuit (10) for a heat engine, said air intake circuit being intended to be positioned between an air compression element and at least an upper portion of a hollow combustion chamber (14) in a cylinder head (11) of the engine, said air intake circuit (10) comprising the cylinder head (11), an air intake manifold (17) and at least one air intake duct (12), characterised in that the circuit comprises at least one concave receptacle (25) turned towards the outside of the engine, housed in a cavity (22) of the cylinder head, and connected to a tubular element (26) pushed into the at least one air intake duct (12).

Description

DISPOSITIF D'ADMISSION D'AIR POUR MOTEUR THERMIQUE  AIR INTAKE DEVICE FOR THERMAL ENGINE
Domaine technique de l'invention Technical field of the invention
La présente invention concerne un circuit d'admission d'air pour moteur thermique ou à combustion interne.  The present invention relates to an air intake circuit for a heat engine or an internal combustion engine.
L'invention concerne également un moteur thermique comprenant un tel un circuit d'admission d'air.  The invention also relates to a heat engine comprising such an air intake circuit.
Enfin, l'invention concerne un véhicule automobile comprenant un tel circuit d'admission d'air ou un tel moteur thermique.  Finally, the invention relates to a motor vehicle comprising such an air intake circuit or such a heat engine.
État de la technique State of the art
Afin de respecter les normes internationales d'émissions des moteurs à allumage commandé, notamment des moteurs à essence, les constructeurs automobiles cherchent à optimiser la combustion du carburant, essence ou diesel, au sein des chambres de combustion du moteur. Dans cette optique, le circuit d'admission d'air doit respecter certaines contraintes : de l'air frais doit être apporté dans chaque chambre de combustion en quantité maîtrisée et tout en générant une turbulence aérodynamique. La turbulence générée est différente selon que l'on a affaire à un moteur à allumage commandé ou un moteur diesel.  In order to meet international emissions standards for spark-ignition engines, including gasoline engines, automakers seek to optimize the combustion of fuel, either gasoline or diesel, within the engine's combustion chambers. In this context, the air intake system must meet certain constraints: fresh air must be brought into each combustion chamber in controlled quantities and while generating aerodynamic turbulence. The turbulence generated is different depending on whether you are dealing with a spark ignition engine or a diesel engine.
Pour améliorer l'efficacité du moteur, il est connu d'intégrer un élément de compression d'air dans le circuit d'admission d'air du moteur afin d'augmenter la pression des gaz admis et permettre un meilleur remplissage des cylindres du moteur en mélange air/carburant, ce qui amène à augmenter la puissance volumique du moteur et donc à augmenter sa puissance ou de réduire la consommation du moteur. Cet élément de compression peut être un compresseur électrique ou un compresseur d'un turbocompresseur, disposé entre un filtre à air et un répartiteur d'admission d'air du moteur. L'air est ainsi capté depuis une face avant du véhicule, puis passe successivement par le filtre, l'élément de compression, un répartiteur d'admission avant de rentrer dans le moteur par des conduites d'admission d'air creusées dans une culasse.  To improve the efficiency of the engine, it is known to integrate an air compression element in the engine air intake circuit in order to increase the pressure of the admitted gases and allow a better filling of the engine cylinders. in an air / fuel mixture, which leads to increase the power density of the engine and thus to increase its power or reduce the engine consumption. This compression element may be an electric compressor or a compressor of a turbocharger, arranged between an air filter and an air intake manifold of the engine. The air is thus captured from a front face of the vehicle, then passes successively through the filter, the compression element, an intake manifold before entering the engine through air intake ducts dug in a cylinder head .
Cependant après compression, l'air d'admission s'est réchauffé ce qui est néfaste à l'efficacité du moteur. Pour amener de l'air frais dans le moteur, un échangeur thermique est agencé dans le circuit d'admission d'air, entre l'élément de compression et le répartiteur d'admission du moteur, pour refroidir l'air compressé qui entre dans les chambres de combustion. However after compression, the intake air has warmed which is detrimental to the efficiency of the engine. To bring fresh air into the engine, a heat exchanger is arranged in the air intake circuit, between the compression element and the engine intake manifold, to cool the compressed air that enters the engine. the combustion chambers.
De manière connue, l'air collecté dans le répartiteur d'admission d'air est distribué dans chaque chambre de combustion par les conduites d'admission d'air traversant la culasse du moteur, ce qui permet de maîtriser les flux d'air d'admission dans chaque cylindre du moteur. Le répartiteur d'admission d'air comprend un boîtier papillon, un volume d'air tampon, également dénommé plénum, et au moins autant de conduites d'admission d'air que de cylindres. Le répartiteur d'admission d'air, également dénommé collecteur d'admission d'air, peut-être par exemple une pièce de fonderie ou une pièce en plastique fixée contre la culasse.  In known manner, the air collected in the air intake manifold is distributed in each combustion chamber by the air intake ducts passing through the cylinder head of the engine, which makes it possible to control the air flows. admission into each cylinder of the engine. The air intake manifold includes a throttle body, a volume of air buffer, also called plenum, and at least as many air intake lines as cylinders. The air intake manifold, also referred to as the air intake manifold, may be for example a casting or a plastic part fixed against the cylinder head.
Le répartiteur d'admission et les conduites d'admission sont aptes à générer des turbulences aérodynamiques dans la chambre de combustion afin de mélanger idéalement l'essence à l'air pour obtenir une combustion efficace. Pour générer ces turbulences aérodynamiques, la géométrie et l'orientation des conduites d'admission d'air par rapport à la chambre de combustion jouent un rôle primordial.  The intake manifold and intake manifolds are capable of generating aerodynamic turbulence in the combustion chamber to ideally mix gasoline with air for efficient combustion. To generate these aerodynamic turbulence, the geometry and orientation of the air intake ducts relative to the combustion chamber play a vital role.
De manière connue, le répartiteur d'admission d'air et l'échangeur thermique sont fixés sur le moteur, notamment sur une paroi de la culasse, ce qui accroît sensiblement l'encombrement du moteur.  In known manner, the air intake distributor and the heat exchanger are fixed on the engine, in particular on a wall of the cylinder head, which substantially increases the size of the engine.
De plus, la réduction du poids du moteur est importante dans l'objectif de réduire la consommation et les émissions de polluant tels que les oxydes de carbone. Afin de réduire la masse de la culasse, il est connu d'intégrer dans la paroi de culasse des éléments du répartiteur d'admission d'air. Ainsi ladite paroi de culasse peut être une paroi du plénum d'un répartiteur.  In addition, reducing the weight of the engine is important in order to reduce the consumption and emissions of pollutants such as carbon oxides. In order to reduce the mass of the cylinder head, it is known to integrate in the cylinder head wall elements of the air intake manifold. Thus said cylinder wall can be a wall of the plenum of a distributor.
La publication US3949715-A divulgue une culasse présentant un plénum d'un répartiteur d'admission d'air. Ledit plénum fait partie de la culasse ce qui accroît le volume de la culasse et par conséquent le poids de celle-ci.  US3949715-A discloses a cylinder head having a plenum of an air intake manifold. Said plenum is part of the cylinder head which increases the volume of the cylinder head and therefore the weight thereof.
Le but de l'invention est de fournir un circuit d'admission d'air pour moteur à thermique, essence ou diesel, remédiant aux inconvénients ci-dessus et améliorant les circuits d'admission d'air pour moteur thermique connus de l'art antérieur. The object of the invention is to provide an air intake circuit for a thermal, gasoline or diesel engine, overcoming the above drawbacks and improving the heat engine air intake circuits known from the prior art.
Présentation de l'invention Presentation of the invention
En particulier, l'invention permet de réaliser un circuit d'admission d'air pour moteur thermique comprenant une tel circuit d'admission d'air qui soient compacts, facile à assembler et minimisant le poids dudit circuit, optimisant la circulation d'air, et qui permettent de limiter les pertes de charge des flux d'air.  In particular, the invention makes it possible to provide an air intake circuit for a heat engine comprising such an air intake circuit which is compact, easy to assemble and minimizes the weight of said circuit, optimizing air circulation. , and which make it possible to limit the losses of load of the air flows.
Plus précisément, l'invention concerne un circuit d'admission d'air pour un moteur thermique, ledit circuit d'admission d'air étant destiné à être positionné entre un élément de compression d'air et au moins une partie supérieure de chambre de combustion creusée dans une culasse du moteur, ledit circuit d'admission d'air comprenant la culasse, un répartiteur d'admission d'air, et au moins un conduit d'admission d'air,  More specifically, the invention relates to an air intake circuit for a heat engine, said air intake circuit being intended to be positioned between an air compression element and at least one upper part of the air chamber. combustion excavated in a cylinder head of the engine, said air intake circuit comprising the cylinder head, an air intake distributor, and at least one intake duct,
caractérisé en ce que le circuit comprend au moins un réceptacle concave tourné vers l'extérieur du moteur, logé dans une cavité de la culasse, et connecté avec un élément tubulaire enfoncé dans le au-moins un conduit d'admission d'air.  characterized in that the circuit comprises at least one concave receptacle facing outwardly of the motor, housed in a recess of the breech, and connected with a tubular member recessed into the at least one air intake duct.
De manière avantageuse, le réceptacle et l'élément tubulaire forment un dispositif pour diriger l'air d'admission directement dans les conduits d'admission creusés dans la culasse. Ils peuvent donc suppléer la formation d'une culasse complexe notamment de la cavité de ladite culasse pour collecter et diriger les flux d'air vers les conduits d'admission de la culasse.  Advantageously, the receptacle and the tubular element form a device for directing the intake air directly into the intake ducts dug in the cylinder head. They can therefore replace the formation of a complex cylinder head including the cavity of said cylinder head to collect and direct the air flow to the intake ducts of the cylinder head.
Selon d'autres caractéristiques de l'invention :  According to other features of the invention:
- le réceptacle est entouré par un rebord radial destiné à venir en appui contre une paroi de fixation de la culasse.  - The receptacle is surrounded by a radial flange for abutting against a wall of the cylinder head.
De manière avantageuse, le rebord radial permet un point de fixation du réceptacle vis-à-vis de la culasse.  Advantageously, the radial flange allows a point of attachment of the receptacle vis-à-vis the cylinder head.
- l'élément tubulaire connecté au réceptacle est conique.  the tubular element connected to the receptacle is conical.
De manière avantageuse, l'élément tubulaire connecté au réceptacle est conique pour permettre une accélération du flux d'air d'admission à son entrée dans la chambre à combustion. - le réceptacle comporte une paroi déflectrice pour diriger un flux d'air vers une ouverture connectée avec l'élément tubulaire. Advantageously, the tubular element connected to the receptacle is conical to allow an acceleration of the intake air flow at its entry into the combustion chamber. the receptacle comprises a deflecting wall for directing an air flow towards an opening connected with the tubular element.
De manière avantageuse, le réceptacle comporte une paroi déflectrice pour diriger un flux d'air vers une ouverture connectée avec l'élément tubulaire ; sa forme est donc optimisée pour diriger le flux d'air d'admission.  Advantageously, the receptacle comprises a deflecting wall for directing an air flow towards an opening connected to the tubular element; its shape is optimized to direct the flow of intake air.
- la paroi de l'élément tubulaire comporte un rigole annulaire en vis-à-vis avec le au-moins un conduit d'admission d'air destinée à accueillir un joint d'étanchéité.  - The wall of the tubular element comprises an annular channel vis-à-vis with the at least one air intake duct for receiving a seal.
De manière avantageuse, l'élément tubulaire comprend un joint d'étanchéité pour éviter tout refoulement d'air d'admission dans des cavités existantes dans la culasse.  Advantageously, the tubular element comprises a seal to prevent any backflow of intake air into existing cavities in the cylinder head.
- le rebord radial du réceptacle comprend un élément d'étanchéité en vis- à-vis avec la paroi de fixation de la culasse.  - The radial rim of the receptacle comprises a sealing member vis-à-vis with the cylinder head mounting wall.
- l'élément d'étanchéité est dans une liste comprenant une lèvre parcourant le contour du rebord, un joint d'étanchéité logé entre le rebord radial et la paroi de fixation de la culasse.  - The sealing member is in a list comprising a lip traversing the contour of the flange, a seal housed between the radial flange and the yoke fixing wall.
De manière avantageuse, le rebord radial du réceptacle comporte un élément d'étanchéité vis-à-vis de la culasse. -le réceptacle est en plastique.  Advantageously, the radial rim of the receptacle comprises a sealing element vis-à-vis the cylinder head. the receptacle is made of plastic.
De manière avantageuse, le réceptacle est en matière plastique ce qui permet une réduction de poids.  Advantageously, the receptacle is made of plastic which allows a reduction in weight.
-le réceptacle est distant de la paroi de la cavité de la culasse.  the receptacle is remote from the wall of the cavity of the cylinder head.
De manière avantageuse, le réceptacle est distant de la paroi de la cavité de la culasse, l'évidement de la cavité est donc supérieur au volume du réceptacle. L'évidement de la culasse pour former la cavité peut donc être optimisé pour une réduction sensible du poids.  Advantageously, the receptacle is remote from the wall of the cavity of the cylinder head, the recess of the cavity is greater than the volume of the receptacle. The recess of the cylinder head to form the cavity can therefore be optimized for a significant reduction in weight.
-le réceptacle, le rebord radial et l'élément tubulaire sont d'une seule pièce.  the receptacle, the radial rim and the tubular element are in one piece.
De manière avantageuse, le réceptacle, le rebord radial et l'élément tubulaire sont d'une seule pièce, ce qui facilite la fabrication tout en autorisant une amélioration de la rigidité de l'ensemble. -le répartiteur comprend une bouche de sortie aval entourée radialement par un trottoir de fixation destiné à venir en appui sur le rebord radial du réceptacle et sur la paroi de fixation de la culasse. Advantageously, the receptacle, the radial flange and the tubular element are in one piece, which facilitates the manufacture while allowing an improvement in the rigidity of the assembly. the distributor comprises a downstream outlet mouth surrounded radially by a securing sidewalk intended to bear against the radial rim of the receptacle and on the wall for fixing the cylinder head.
De manière avantageuse, le rebord radial est adapté pour la jonction optimale du répartiteur avec la culasse.  Advantageously, the radial flange is adapted for the optimal junction of the distributor with the cylinder head.
-le rebord radial, le réceptacle et l'élément tubulaire sont parties du répartiteur d'admission d'air.  the radial flange, the receptacle and the tubular element are parts of the air intake distributor.
De manière avantageuse, le rebord radial, le réceptacle et l'élément tubulaire sont parties du répartiteur d'admission d'air, ce qui permet de réduire le nombre de pièces en référence et le nombre de manipulations pour l'assemblage du circuit d'admission d'air.  Advantageously, the radial flange, the receptacle and the tubular element are part of the air intake distributor, which makes it possible to reduce the number of parts in reference and the number of manipulations for the assembly of the circuit. air intake.
Brève description des figures Brief description of the figures
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés sur les dessins annexés, dans lesquels :  Other features and advantages of the invention will appear on reading the following description of particular embodiments of the invention given as non-limiting examples and shown in the accompanying drawings, in which:
-la figure 1 est une vue schématique longitudinale d'une coupe d'un circuit d'admission d'air.  FIG 1 is a longitudinal schematic view of a section of an air intake circuit.
-la figure 2 est une vue schématique de coupe de dessus du circuit d'admission d'air selon l'invention.  FIG. 2 is a schematic view of a sectional view of the air intake circuit according to the invention.
-la figure 3 est une vue schématique de coupe longitudinale du circuit d'admission d'air selon l'invention. Description détaillée des figures  FIG 3 is a schematic longitudinal sectional view of the air intake circuit according to the invention. Detailed description of the figures
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires.  In the following description, like reference numerals designate like parts or having similar functions.
Tel que représenté schématique en figure 1 , les véhicules automobiles peuvent être équipés de moteur thermique 100 ou à combustion interne. Le moteur thermique comprend généralement une culasse surmontant un bloc- cylindres 101 , également dénommé « bloc-moteur ». Le moteur comprend également un circuit d'admission d'air 10 par lequel de l'air entre dans des chambres de combustion 14 du moteur depuis l'extérieur. As shown diagrammatically in FIG. 1, the motor vehicles may be equipped with a heat engine 100 or with an internal combustion engine. The heat engine generally comprises a cylinder head surmounting a cylinder block 101, also called "engine block". The engine includes also an air intake circuit 10 through which air enters the combustion chambers 14 of the engine from the outside.
L'air est capté depuis une face avant du véhicule et passe par le circuit d'admission pour être injecté dans les chambres à combustion. Pour améliorer les performances du moteur, il est connu d'augmenter la pression des gaz admis et permettre un meilleur remplissage des cylindres du moteur en mélange air/carburant. La puissance volumique du moteur est ainsi augmentée de même que sa puissance avec une réduction de la consommation du moteur. Un étage de compression d'air d'admission est ainsi disposé entre un filtre à air et le moteur. Cet étage de compression est formé soit par la partie de compression d'un turbocompresseur soit par un compresseur électrique. Selon la figure 1 , on peut voir un cône amont 102 de connexion entre l'étage de compression (non représenté) et le circuit d'admission d'air 10.  The air is captured from a front of the vehicle and passes through the intake circuit to be injected into the combustion chambers. To improve engine performance, it is known to increase the pressure of the admitted gases and allow a better filling of the engine cylinders air / fuel mixture. The power density of the engine is thus increased as well as its power with a reduction of the engine consumption. An intake air compression stage is thus disposed between an air filter and the engine. This compression stage is formed either by the compression part of a turbocharger or by an electric compressor. According to FIG. 1, it is possible to see an upstream cone 102 for connection between the compression stage (not shown) and the air intake circuit 10.
L'air compressé est alors à température élevée et sa masse volumique est réduite ce qui est néfaste à la performance du moteur. Il est donc utile d'adjoindre audit compresseur en aval selon le sens de circulation de l'air au compresseur un étage de refroidissement de l'air. Cet étage de refroidissement peut être composé d'un refroidisseur 16 et plus précisément d'un échangeur air/eau. De l'eau à température modérée passe par l'échangeur et emporte une partie de la chaleur de l'air compressé.  The compressed air is then at high temperature and its density is reduced which is detrimental to the engine performance. It is therefore useful to add to said compressor downstream in the direction of flow of air to the compressor a cooling stage of the air. This cooling stage can be composed of a cooler 16 and more precisely of an air / water heat exchanger. Water at moderate temperature passes through the heat exchanger and takes away some of the heat from the compressed air.
L'air est ensuite dirigé vers un répartiteur d'admission 17 d'air pour maîtriser les flux d'air admis dans les chambres à combustion 14. Ledit répartiteur est fixé par une bride 104 à une paroi de fixation 20 de la culasse du moteur et dirige l'air compressé et refroidi vers des conduits d'admission 12 d'air creusés dans la culasse. Lesdits conduits d'admission dans la culasse sont de forme et de profil particuliers selon le type de moteur par exemple à carburant diesel ou à allumage commandé.  The air is then directed to an air intake distributor 17 for controlling the air flow admitted into the combustion chambers 14. Said distributor is fixed by a flange 104 to a wall 20 for fixing the engine cylinder head and directs the compressed and cooled air to air intake ducts 12 dug into the cylinder head. Said admission ducts in the cylinder head are of particular shape and profile depending on the type of engine for example diesel fuel or spark ignition.
Le circuit d'admission 10 est disposé entre un compresseur (non représenté) et le moteur 100 qui comprend un carter cylindres 101 surmonté de la culasse 1 1 . Dans le carter-cylindres sont disposés des cylindres 103 dans lesquels sont logés des pistons. Lesdits pistons sont animés d'un mouvement de coulissement selon l'axe du cylindre en va et vient. Une chambre de combustion est définie pour chacun des cylindres et elle est délimitée par le cylindre, le piston et une paroi inférieure 13 de la culasse. Dans la dite paroi inférieure de la culasse débouchent les conduits d'admission 12 dont les ouvertures vers chacune des chambres à combustion 14 sont obturées par des soupapes commandées 15. The intake circuit 10 is disposed between a compressor (not shown) and the engine 100 which comprises a cylinder block 101 surmounted by the cylinder head January 1. In the crankcase are arranged cylinders 103 in which pistons are housed. Said pistons are driven in a sliding movement along the axis of the cylinder back and forth. A combustion chamber is defined for each of the cylinders and is defined by the cylinder, the piston and a bottom wall 13 of the cylinder head. In said lower wall of the cylinder head open the intake ducts 12 whose openings to each of the combustion chambers 14 are closed by controlled valves 15.
Selon les figures 1 à 3, le refroidisseur 16 et le répartiteur 17 d'admission d'air sont en une seule pièce 19. Le refroidisseur est aussi appelé WCAC acronyme pour «WCAC » signifiant Water Charge Air Cooler pour refroidisseur eau/air. Le répartiteur se distingue essentiellement par un plénum 18 ou chambre de réserve d'air avant l'entrée dans les conduits d'admission 12 de la culasse. Dans notre mode de réalisation le répartiteur et en aval de l'échangeur et partage un même carter. Ledit carter est directement fixé sur une paroi de fixation de la culasse. Ladite paroi de fixation 20 s'étend sur un plan et présente une inclinaison par rapport à un plan horizontal représenté par exemple par un plan de joint 21 entre la culasse et le carter cylindres. Ladite inclinaison permet une mise en place du refroidisseur plus simple et un maintien plus fiable.  According to FIGS. 1 to 3, the cooler 16 and the air intake manifold 17 are in one piece 19. The cooler is also called WCAC acronym for "WCAC" meaning Water Charge Air Cooler for water / air cooler. The distributor is essentially distinguished by a plenum 18 or air reserve chamber before entering the intake ducts 12 of the cylinder head. In our embodiment the distributor and downstream of the exchanger and shares the same housing. Said casing is directly fixed to a wall for fixing the cylinder head. Said fixing wall 20 extends on a plane and has an inclination relative to a horizontal plane shown for example by a joint plane 21 between the cylinder head and the cylinder block. Said inclination allows a simpler cooler installation and a more reliable maintenance.
La description qui suit est faite pour un cylindre pour faciliter la compréhension mais le moteur selon l'invention comporte au-moins un cylindre.  The following description is made for a cylinder to facilitate understanding but the engine according to the invention comprises at least one cylinder.
Selon les deux figures, la culasse 1 1 comporte une cavité 22 dans laquelle débouche un conduit primaire 23 d'admission d'air. Ce conduit primaire est ensuite prolongé par deux conduits secondaires 24 qui amèneront l'air d'admission selon deux directions distinctes dans la chambre à combustion pour obtenir un effet tourbillonnant (« swirl » ou « tumble ») désiré selon le type de moteur à carburant diesel ou essence.  According to the two figures, the yoke 1 1 has a cavity 22 into which opens a primary conduit 23 of air intake. This primary duct is then extended by two secondary ducts 24 which will bring the intake air in two distinct directions in the combustion chamber to obtain a desired swirling or tumbling effect according to the type of fuel engine. diesel or gasoline.
La cavité 22 est obtenue par moulage et l'état de surface de la paroi de la cavité est peu important. De manière avantageuse, la culasse est évidée autant que possible en tenant compte des contraintes mécaniques de rigidité de la culasse, autour du débouché du conduit primaire 23 d'admission.  The cavity 22 is obtained by molding and the surface state of the wall of the cavity is small. Advantageously, the cylinder head is hollowed out as much as possible taking into account the mechanical rigidity constraints of the cylinder head, around the outlet of the primary conduit 23 intake.
Un réceptacle 25 est disposé dans la cavité. Le réceptacle présente une forme de cuvette avec une courbure tournée vers l'extérieur du moteur et vers le répartiteur lorsque le répartiteur est monté contre la paroi de fixation de la culasse. Le réceptacle 25 comporte une ouverture 30 connectée avec un élément sensiblement tubulaire 26. Ledit élément tubulaire permet de diriger l'air d'admission dans le conduit primaire 23 d'admission de la culasse 1 1 . Ledit élément tubulaire est sensiblement conique avec une réduction de la section de passage d'amont 25 en aval 28 pour accélérer l'air d'admission. La section extérieure de l'extrémité aval 28 de cet élément tubulaire est sensiblement complémentaire au jeu de montage près à la section de passage du conduit primaire 23. A receptacle 25 is disposed in the cavity. The receptacle has a bowl shape with a bend facing the outside of the motor and to the distributor when the distributor is mounted against the cylinder head wall. The receptacle 25 has an opening 30 connected to a substantially tubular element 26. Said tubular element makes it possible to direct the intake air into the primary inlet duct 23 of the cylinder head 1 January. Said tubular element is substantially conical with a reduction of the downstream upstream flow section 28 to accelerate the intake air. The outer section of the downstream end 28 of this tubular element is substantially complementary to the mounting clearance near the passage section of the primary duct 23.
De manière préférentielle, l'extrémité aval de l'élément tubulaire est entourée par une pièce d'étanchéité entre l'extrémité aval 28 de l'élément tubulaire 26 et le conduit primaire d'admission 23 de la culasse, pour éviter des retours d'air en direction de la cavité 22 de la culasse. Cette pièce peut être une lèvre d'étanchéité. De manière préférentielle, selon le mode de réalisation présenté en figure 2, cette pièce d'étanchéité est un joint annulaire 29 reçu dans une rigole annulaire (non représentée) en vis-à-vis ave la paroi du conduit primaire 23 de la culasse et entourant l'extrémité aval 28 de l'élément tubulaire. Le joint annulaire 29 est en élastomère et présente des propriétés d'élasticité et d'amortissement.  Preferably, the downstream end of the tubular element is surrounded by a sealing piece between the downstream end 28 of the tubular element 26 and the primary inlet duct 23 of the cylinder head, to avoid return air towards the cavity 22 of the cylinder head. This piece can be a sealing lip. Preferably, according to the embodiment shown in FIG. 2, this sealing piece is an annular seal 29 received in an annular channel (not shown) facing the wall of the primary duct 23 of the cylinder head and surrounding the downstream end 28 of the tubular element. The annular seal 29 is made of elastomer and has elasticity and damping properties.
Le réceptacle 25 comporte une paroi déflectrice 31 apte à diriger l'air d'admission vers l'ouverture 30 connectée avec l'élément tubulaire 26. La paroi déflectrice 31 telle que représentée en figure 3 est par exemple plane et inclinée par rapport au plan horizontal 21 pour diriger l'air d'admission vers la partie inférieure du réceptacle ou est disposée l'ouverture 30, une fois le réceptacle monté dans la culasse.  The receptacle 25 comprises a deflecting wall 31 able to direct the intake air towards the opening 30 connected with the tubular element 26. The deflecting wall 31 as represented in FIG. 3 is for example flat and inclined with respect to the plane horizontal 21 to direct the intake air to the lower part of the receptacle or is disposed the opening 30, once the receptacle mounted in the cylinder head.
Le réceptacle 25 est entouré par un rebord 32 ou trottoir de fixation s'étendant radialement et destiné à venir en appui contre la paroi de fixation 20 de la culasse 1 1 . Ledit rebord 32 s'étend sur un plan d'appui 34.  The receptacle 25 is surrounded by a flange 32 or curb extending radially and intended to abut against the fixing wall 20 of the cylinder head 1 January. Said rim 32 extends on a support plane 34.
De manière avantageuse, le volume délimité par le réceptacle 25 et le plan d'appui 34 est inférieur au volume délimité par la cavité 22 et le plan de la paroi de fixation 20 de la culasse. De ce fait la paroi du réceptacle 25 est distante de la paroi de la cavité 22 de la culasse une fois le réceptacle monté dans la culasse. Ceci permet également un montage aisé du réceptacle avec l'élément tubulaire dans la culasse 1 1 . Advantageously, the volume delimited by the receptacle 25 and the support plane 34 is smaller than the volume delimited by the cavity 22 and the plane of the fixing wall 20 of the cylinder head. As a result, the wall of the receptacle 25 is distant from the wall of the cavity 22 of the cylinder head once the receptacle is mounted in the cylinder head. This also allows easy mounting of the receptacle with the tubular element in the cylinder head January 1.
De manière préférentielle, ledit rebord de fixation comporte un élément d'étanchéité en vis-à-vis avec la paroi de fixation 20 de la culasse. Ledit élément d'étanchéité est dans une liste comprenant une lèvre parcourant le contour du rebord, un joint d'étanchéité logé entre le rebord et le plan de la paroi de fixation 20 de la culasse.  Preferably, said fixing flange comprises a sealing element vis-a-vis with the wall 20 for fixing the cylinder head. Said sealing element is in a list comprising a lip traversing the contour of the flange, a seal housed between the flange and the plane of the wall 20 for fixing the yoke.
De manière préférentielle le rebord de fixation est formé pour être en accord avec le pourtour du répartiteur d'air d'admission. En effet, le répartiteur 17 comporte une bouche aval de sortie d'air entourée par un trottoir de fixation 33 destiné à venir en appui contre le rebord de fixation 32 et contre la paroi de fixation 20 de la culasse 1 1 . Ledit rebord de fixation est donc interposé entre le répartiteur d'air 17 et la paroi fixation 20 de la culasse 1 1 . Un élément d'étanchéité également est disposé entre le rebord de fixation 32 et le trottoir de fixation 33 du répartiteur. Ledit élément d'étanchéité peut être dans une liste comprenant une lèvre parcourant le contour du rebord, un joint d'étanchéité logé entre le rebord et le trottoir de fixation 33 du répartiteur.  Preferably the fixing flange is formed to be in accordance with the periphery of the intake air distributor. Indeed, the distributor 17 comprises a downstream air outlet mouth surrounded by a securing sidewalk 33 intended to bear against the fixing flange 32 and against the fixing wall 20 of the cylinder head 1 January. Said fixing flange is therefore interposed between the air distributor 17 and the fixing wall 20 of the cylinder head 1 January. A sealing element is also arranged between the fixing flange 32 and the attachment sidewalk 33 of the distributor. Said sealing member may be in a list comprising a lip traversing the contour of the flange, a seal housed between the flange and the attachment sidewalk 33 of the distributor.
De manière avantageuse, les trois éléments qui sont le rebord de fixation 32, le réceptacle 25 et l'élément tubulaire 26 sont issus d'une même pièce obtenue par moulage et en matière plastique et forment une pièce d'interface 35 entre le répartiteur 17 et la culasse 1 1 permettant d'obtenir une culasse plus légère et plus simple à fabriquer.  Advantageously, the three elements which are the fixing flange 32, the receptacle 25 and the tubular element 26 are derived from the same part obtained by molding and made of plastic and form an interface piece 35 between the distributor 17 and the cylinder head 1 1 to obtain a cylinder head lighter and simpler to manufacture.
Le montage de l'interface comprend les étapes suivantes :  The editing of the interface includes the following steps:
-mise en place du joint annulaire 29 dans la rigole autour de l'extrémité aval de l'élément tubulaire,  placing the annular seal 29 in the channel around the downstream end of the tubular element,
-mise en place éventuelle du joint d'étanchéité au niveau du rebord de l'interface,  -possible installation of the seal at the edge of the interface,
-introduction de l'élément tubulaire dans le conduit primaire 23,  introduction of the tubular element into the primary conduit 23,
-enfoncement du réceptacle 25 dans la cavité 22 de la culasse jusqu'au contact en appui du rebord 32 contre la paroi de fixation 20 de la culasse,  -finding of the receptacle 25 in the cavity 22 of the cylinder head to the contact in abutment with the flange 32 against the fixing wall 20 of the cylinder head,
-mise en place du répartiteur d'admission d'air devant l'interface, la bouche aval dudit répartiteur est en regard du réceptacle 25, -fixation du répartiteur contre la culasse, le trottoir de fixation 33 du répartiteur est alors en appui sur le rebord de la pièce d'interface 35. putting in place of the air intake distributor in front of the interface, the downstream mouth of said distributor is opposite the receptacle 25, -fixation of the distributor against the cylinder head, the fastening sidewalk 33 of the distributor is then resting on the flange of the interface piece 35.
Une fois montée, la pièce d'interface 25 permet de diriger le flux d'air d'admission issu du répartiteur 17 vers le conduit primaire 23 de la culasse. Le joint annulaire 29 permet d'une part de garantir un non refoulement de l'air dans la cavité 22 de la culasse et d'autre part un amortissement des vibrations engendrées par le passage de l'air.  Once mounted, the interface piece 25 directs the flow of intake air from the distributor 17 to the primary conduit 23 of the cylinder head. The annular seal 29 makes it possible, on the one hand, to guarantee non-return of air in the cavity 22 of the cylinder head and, on the other hand, to damp the vibrations generated by the passage of air.
L'objectif est atteint : la pièce d'interface 35 permet d'obtenir une culasse 1 1 plus simple de fabrication et également plus légère.  The objective is achieved: the interface piece 35 makes it possible to obtain a cylinder head 1 1 that is simpler to manufacture and also lighter.
Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de cette prise, décrites ci-dessus à titre d'exemples, elle en embrasse au contraire toutes les variantes.  As goes without saying, the invention is not limited to the embodiments of this plug, described above as examples, it encompasses all variants.

Claims

REVENDICATIONS
1 . Circuit d'admission d'air (10) pour un moteur thermique, ledit circuit d'admission d'air étant destiné à être positionné entre un élément de compression d'air et au moins une partie supérieure de chambre de combustion (14) creusée dans une culasse (1 1 ) du moteur, ledit circuit d'admission d'air (10) comprenant la culasse (1 1 ), un répartiteur d'admission d'air (17), et au moins un conduit d'admission d'air (12), 1. An air intake circuit (10) for a heat engine, said air intake circuit being adapted to be positioned between an air compression member and at least one combustion chamber top (14) hollowed out in a cylinder head (1 1) of the engine, said air intake circuit (10) comprising the cylinder head (1 1), an air intake distributor (17), and at least one intake duct air (12),
caractérisé en ce que le circuit comprend au moins un réceptacle (25) concave tourné vers l'extérieur du moteur, logé dans une cavité (22) de la culasse, et connecté avec un élément tubulaire (26) enfoncé dans le au-moins un conduit d'admission (12) d'air.  characterized in that the circuit comprises at least one concave receptacle (25) facing outwardly of the motor, housed in a cavity (22) of the yoke, and connected with a tubular element (26) embedded in the at least one intake duct (12) of air.
2. Circuit d'admission d'air (10) selon la revendication 1 , caractérisé en ce que le réceptacle (25) est entouré par un rebord (32) radial destiné à venir en appui contre une paroi de fixation (20) de la culasse (1 1 ).  2. Air intake circuit (10) according to claim 1, characterized in that the receptacle (25) is surrounded by a radial flange (32) intended to bear against a fixing wall (20) of the cylinder head (1 1).
3. Circuit d'admission d'air (10) selon la revendication 1 ou 2, caractérisé en ce que l'élément tubulaire (26) connecté au réceptacle (25) est conique.  An air intake circuit (10) according to claim 1 or 2, characterized in that the tubular member (26) connected to the receptacle (25) is tapered.
4. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le réceptacle (25) comporte une paroi déflectrice (31 ) pour diriger un flux d'air vers une ouverture (30) connectée avec l'élément tubulaire (26).  Air intake system (10) according to one of Claims 1 to 3, characterized in that the receptacle (25) has a deflecting wall (31) for directing a flow of air to an opening ( 30) connected with the tubular element (26).
5. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la paroi de l'élément tubulaire (26) comporte un rigole annulaire en vis-à-vis avec le au-moins un conduit d'admission d'air destinée à accueillir un joint d'étanchéité (29).  5. Air intake circuit (10) according to any one of claims 1 to 4, characterized in that the wall of the tubular element (26) comprises an annular channel vis-à-vis with the less an air intake duct intended to receive a seal (29).
6. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le rebord radial (32) du réceptacle (25) comprend un élément d'étanchéité en vis-à-vis avec la paroi de fixation (20) de la culasse.  6. Air intake circuit (10) according to any one of claims 1 to 5, characterized in that the radial flange (32) of the receptacle (25) comprises a sealing member vis-à-vis with the fixing wall (20) of the cylinder head.
7. Circuit d'admission d'air (10) selon la revendication 6, caractérisé en ce que l'élément d'étanchéité est dans une liste comprenant une lèvre parcourant le contour du rebord, un joint d'étanchéité logé entre le rebord radial (32) et la paroi de fixation (20) de la culasse. Air intake circuit (10) according to claim 6, characterized in that the sealing element is in a list comprising a lip traversing the contour of the flange, a seal housed between the radial flange (32) and the fixing wall (20) of the cylinder head.
8. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le réceptacle (25) est en plastique.  8. Air intake circuit (10) according to any one of claims 1 to 7, characterized in that the receptacle (25) is plastic.
9. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le réceptacle (25) est distant de la paroi de la cavité (22) de la culasse.  9. Air intake circuit (10) according to any one of claims 1 to 8, characterized in that the receptacle (25) is remote from the wall of the cavity (22) of the cylinder head.
10. Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le réceptacle (25), le rebord radial (32) et l'élément tubulaire (26) sont d'une seule pièce.  Air intake system (10) according to one of Claims 1 to 9, characterized in that the receptacle (25), the radial flange (32) and the tubular element (26) are one piece.
1 1 . Circuit d'admission d'air (10) selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le répartiteur (17) comprend une bouche de sortie aval entourée radialement par un trottoir de fixation (33) destiné à venir en appui sur le rebord radial (32) du réceptacle et sur la paroi de fixation (20) de la culasse.  1 1. Air intake circuit (10) according to any one of claims 1 to 10, characterized in that the distributor (17) comprises a downstream outlet mouth radially surrounded by a securing sidewalk (33) intended to come into operation. bearing on the radial flange (32) of the receptacle and on the fixing wall (20) of the cylinder head.
EP18789165.0A 2017-11-08 2018-10-24 Air intake device for a heat engine Withdrawn EP3707365A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1760459A FR3073257B1 (en) 2017-11-08 2017-11-08 AIR INTAKE DEVICE FOR THERMAL ENGINE
PCT/EP2018/079167 WO2019091785A1 (en) 2017-11-08 2018-10-24 Air intake device for a heat engine

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EP3707365A1 true EP3707365A1 (en) 2020-09-16

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US (1) US11149700B2 (en)
EP (1) EP3707365A1 (en)
JP (1) JP2021509706A (en)
KR (1) KR102645153B1 (en)
CN (1) CN111542692B (en)
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WO (1) WO2019091785A1 (en)

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FR3126454B1 (en) 2021-09-01 2023-12-29 Renault Sas Optimized water-air heat exchanger

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FR3073257A1 (en) 2019-05-10
US11149700B2 (en) 2021-10-19
CN111542692A (en) 2020-08-14
WO2019091785A1 (en) 2019-05-16
JP2021509706A (en) 2021-04-01
KR20200077587A (en) 2020-06-30
US20200370520A1 (en) 2020-11-26
KR102645153B1 (en) 2024-03-08
CN111542692B (en) 2022-10-25
RU2020117300A (en) 2021-11-26
RU2020117300A3 (en) 2022-01-31
FR3073257B1 (en) 2021-02-19

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