Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
  • F02M35/10072—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
  • F02M35/1034—Manufacturing and assembling intake systems
  • F02M35/10354—Joining multiple sections together
• • 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

Definitions

• the present invention relates to an air distributor for thermal combustion engines, in particular for supercharged engines.
• an air distributor also called an intake manifold, comprises an air inlet and several air outlets intended to be connected to a cylinder head of an engine in order to supply each cylinder of the engine with the air necessary for fuel combustion.
• the air from the air filter enters the distributor through the air inlet, either directly in the case of so-called naturally aspirated engines, or via a turbocharger in the case of supercharged engines.
• the air is then directed to an internal volume of the distributor and from this internal volume to the air outlets via outlet ducts.
• These outlet ducts may have a variable geometry depending on the engines. In particular, in the case of a supercharged engine, these outlet ducts are generally short and substantially rectilinear. This specific configuration makes it possible to produce the air distributor by assembling two distinct plastic parts, obtained by an injection molding process for example. Currently, these two parts are assembled by vibration welding.
• a first drawback is the need to use a dedicated welding means which is specific to each type of distributor.
• a second drawback is the need for precise and rigorous focusing during the welding process due to the very high pressures applied to the parts to be assembled.
• a third drawback is the appearance of particles within the distributor due to the friction of the two parts to be assembled during the welding process. Since these particles can cause significant damage to the engine, it is generally mandatory to carry out a complete cleaning of the air distributor before it is fixed to the cylinder head. All of these drawbacks therefore do not make it possible to produce an air distributor in a simple and inexpensive manner, while respecting increasingly drastic cleanliness criteria.
• the present invention therefore aims to provide an air distributor which does not have the aforementioned drawbacks, and, in particular, an air distributor which is both simple and inexpensive to manufacture, and having a level of cleanliness in accordance with the standards. in force.
• the invention relates to an air distributor intended to be fixed to a cylinder head of a thermal combustion engine, said air distributor comprising an inlet orifice opening into an internal volume of said distributor. air and a plurality of outlet ducts each intended to connect said internal volume to a respective cylinder of the engine, characterized in that the air distributor comprises:
• main body defining the inlet orifice, and at least partially the internal volume and the plurality of outlet conduits,
• perforated structure arranged between the main body and the internal cover, said perforated structure being configured to, on the one hand, ensure the gas tightness between the air distributor and the cylinder head, thus between the outlet ducts, and, on the other hand, participate in the mechanical maintenance of the internal cover with the main body.
• the air distributor of the present invention may be formed by the assembly of two distinct parts, namely a main body and an internal cover, fixed together only by mechanical fixing means.
• the problems associated with the use of an assembly process by vibration welding will thus be avoided.
• the perforated structure arranged between the main body and the internal cover will make it possible to improve the sealing and the mechanical retention of the assembly thus produced, thus improving the performance of the distributor compared with a distributor assembled by vibration welding.
• the main body and the internal cover are configured to form at least one groove opening onto an outer face of the air distributor which is intended to come into contact with the cylinder head of the engine, said groove being able to at least partially house said structure openwork.
• the groove comprises a plurality of main segments of annular shape, each of the main segments surrounding one of the outlet conduits, said main segments being connected by a plurality of intermediate segments with a rectilinear profile.
• each main segment of the groove comprises at least a first end segment having substantially a partially annular shape and at least one second end segment also having a partially annular shape, said second end segment being contiguous with said first segment d 'end, and in that the first segment is defined only by the main body and the second end segment is defined only by the inner cover.
• the groove has a width slightly greater than that of the perforated structure and a height slightly less than that of the perforated structure so as to allow the deformation of the perforated structure during the fixing of the air distributor on the cylinder head of the engine.
• the perforated structure comprises several main portions of substantially annular shape, each of said main portions surrounding an end portion of the outlet ducts so that they thus provide gas tightness between the air distributor and the cylinder head motor, as well as between the outlet ducts, said main portions being interconnected by intermediate portions so that the perforated structure thus participates in the mechanical retention of the internal cover with the main body.
• the internal cover is fixed to the main body by clipping.
• the perforated structure consists of an elastomeric material comprising, preferably, 80% of fluoroelastomers.
• the invention also relates to a motor vehicle with a thermal combustion engine equipped with an air distributor as defined above.
• FIG. 1 is a perspective view of an air distributor according to the invention.
• FIG. 1 is an exploded perspective view of the air distributor of Figure 1.
• FIG. 3 is a bottom view, cylinder head side, of the air distributor of Figure 1.
• FIG. 4 is a cross-sectional view of the distributor according to the invention according to the section plane AA indicated in Figure 3.
• an air distributor has at its upstream end an air inlet and at its downstream end a plurality of air outlets.
• longitudinal refers to directions oriented in the upstream / downstream direction
• lateral term refers to directions oriented perpendicularly to the upstream / downstream direction.
• the main body 2 has a through cavity 4 inside which is housed the internal cover 3.
• the through cavity 4 opens, on one side, into a first opening 5 formed in a wall. upstream 6 of the main body 1 and, on the other side, on a second opening 7 formed in a downstream wall 8 of the main body 1.
• the first opening 5 defines the air inlet of the air distributor 1 and has substantially a circular shape.
• the second opening 7 has an oblong shape, as shown in Figure 2, said oblong shape being configured to allow passage of the internal cover 3.
• the internal cover 3 in the fully assembled configuration of the air distributor 1 , is positioned completely inside the through cavity 4 of the main body 2, a downstream wall 12 of said internal cover 3 being substantially coplanar with the downstream wall 8 of the main body 2 and an upstream wall 11 of said cover internal 3 facing an internal wall 9 of the main body 2, which delimits the through cavity 4.
• the internal walls 9 and upstream 11 each have a curved profile which can resemble that of one side of a violin, so that the upstream wall 11 of the internal cover 3 makes it possible to define, in combination with the internal wall 9 of the main body 2, two outlet ducts 21, 24 arranged respectively at each of the lateral ends s of the air distributor 1, as illustrated in FIG. 3.
• outlet ducts 22, 23 of the air distributor 1, arranged between the outlet ducts 21, 24, are defined by longitudinal openings 13 and 14, formed through the inner cover 3.
• the spacing between the outlet ducts 21 to 24 will advantageously be defined to correspond to that of corresponding inlet ducts of the cylinder head, so that when the air distributor 1 will be fixed on the cylinder head, each of the outlet ducts 21 to 24 will make it possible to fluidly connect the air inlet 5 with one of the inlet ducts of the cylinder head, which will open out on one of the engine cylinders.
• groove 15 is formed of a plurality of main segments 151, 152, 153 and 154 spaced apart along a lateral direction, said main segments having a substantially annular shape.
• Each of the main segments 151 and 154 is formed of a first end segment 151a and 154a having substantially a partially annular shape and a second end segment 151b and 154b also having a partially annular shape, said second segment of end 151b and 154b being contiguous with said first end segment 151a and 154a.
• the first end segment 151a and 154a is defined only by the main body 2 and the second end segment 151b and 154b is defined only by the inner cover 3.
• each of the main segments 152 and 153 is formed.
• a first end segment 152a and 153a having substantially a partially annular shape
• a second end segment 152b and 153b also having a partially annular shape
• said second end segment 152b and 153b being contiguous with said first segment end 152a and 153a
• a third end segment 152a 'and 153a' having substantially a partially annular shape
• said third end segment 152a 'and 153a' being contiguous with said second end segment 152b and 153b
• of a fourth end segment 152b 'and 153b' also having a partially annular shape
• said fourth end segment 152b 'and 153b' being contiguous with said third end segment emitted 152a 'and 153a' and said first end segment 152a and 153a.
• the first and third end segments 152a, 152a 'and 153a, 153a' are defined only by the main body 2 and the second and fourth end segments 152b, 152b 'and 153b, 153b' are defined only by the inner cover 3.
• the groove 15 is thus configured to accommodate an openwork structure 10 shown in FIG. 2.
• Said openwork structure 10 is in particular formed of several main portions 101, 102, 103 and 104 of substantially annular shape, each of said main portions 101 to 104 respectively surrounding an end portion of the outlet ducts 21 to 24, said main portions 101 to 104 being interconnected by intermediate portions 105, 105 ', 106, 106', 107, 107 '.
• each of the main portions 101 to 104 is, in the fully assembled configuration of the air distributor 1, housed respectively in one of the main segments 151 to 154 of the groove 15 and each of the portions intermediates 105 to 107 and 105 'to 107' is housed respectively in one of the intermediate segments 155 to 157 and 155 'to 157' of the groove 15.
• the perforated structure 10 will participate in the mechanical retention of the internal cover 3 on the body main 2, since each of the main portions 101-104 surrounds both at least one end segment 151a, 152a, 152a ', 153a, 153a' and / or 154a defined by the main body 2 only and at least one end segment 151b, 152b, 152b ', 153b, 153b' and / or 154b defined by the inner cover 3 only.
• the material constituting the perforated structure 10 in particular by forming the perforated structure 10 in an elastomeric material having increased resistance to gasoline and oil vapors, in particular consisting of a material comprising at least 80% fluoroelastomers, it will also be possible to thus ensure a gas tightness between the air distributor 1 and the cylinder head of the engine, as well as between the outlet ducts 21 to 24.
• This tightness can be advantageously reinforced by configuring the groove 15 so that its width in a lateral direction is slightly greater than that of the perforated structure 10 and its height in the longitudinal direction is slightly less than that of the perforated structure 10. In this way, when fixing of the air distributor 1 on the cylinder head, the perforated structure 10, sandwiched between the underside of the air distributor 1 and the upper face e of the cylinder head, will deform so as to completely fill the free space defined by the groove 15.

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

Applications Claiming Priority (2)

Publications (2)

Family

ID=67875758

Family Applications (1)

Country Status (4)

Family Cites Families (4)

• 2019
  • 2019-07-12 FR FR1907872A patent/FR3098554B1/fr active Active
• 2020
  • 2020-07-08 WO PCT/FR2020/051216 patent/WO2021009441A1/fr not_active Ceased
  • 2020-07-08 EP EP20750330.1A patent/EP3997326B1/de active Active
  • 2020-07-08 HU HUE20750330A patent/HUE068824T2/hu unknown

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