Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
  • F03D80/70—Bearing or lubricating arrangements
• • 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
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
  • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
  • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/104—Intake manifolds
  • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
• • 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
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction
• • 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 a gas distribution manifold in intake ducts of a motor vehicle engine. It also relates to a gas intake module comprising such a collector.
• a motor vehicle engine has a combustion chamber, generally formed by a plurality of cylinders, in which a mixture of oxidant and fuel is burned to generate the engine work.
• the gases admitted into the combustion chamber are called intake gases.
• these inlet gases must be cooled before being introduced into the combustion chamber; this function is fulfilled by a heat exchanger, which is a cooler.
• a current trend is to bring the heat exchanger closer to the engine.
• the patent application FR2908833 proposes for this purpose a gas intake device, in which the heat exchanger and the gas intake manifold are integrated in a unitary module intended to be fixed on the cylinder head of the engine.
• this device is especially suitable for engines having intake ducts distributed in a single line and is less suitable for engines having intake ducts distributed in several lines.
• the present invention aims to remedy this disadvantage.
• the invention firstly relates to a gas distribution manifold in intake ducts of a motor vehicle engine, said intake ducts being distributed in at least two remote groups, each driving a group supplying the same engine cylinder as a conduit of the other group, said manifold comprising:
• a collector housing adapted to be traversed by a flow of intake gas
• an injection duct for injecting a flow of recirculated exhaust gas into the intake gas flow
• the casing being adapted to direct the flow of intake gas and the stream of recirculated exhaust gas to the intake ducts of the engine and the injection duct being disposed inside the collector housing so as to be able to be positioned between the two groups of intake ducts.
• the particular arrangement of the injection conduit, according to the invention allows a good distribution of gases in the engine cylinders even when there are significant distances between the intake ducts of the same cylinder.
• the collector housing may comprise an inlet face of the intake gas flow and an outlet face intended to face the engine.
• the said inlet face is intended to be subject to a heat exchanger and / or said outlet face is intended to be secured to the engine, including its cylinder head.
• the manifold comprises intake ports intended to be connected to the intake ducts.
• the intake ports are aligned in two distinct groups and the injection pipe is positioned in an intermediate position, particularly central, with respect to the two groups of intake ports.
• the intermediate and / or central positioning of the injection duct with respect to the two groups of intake ports makes it possible to balance the distribution of the recirculated exhaust gases in the cylinders.
• the collector may include, especially at the outlet side of the housing, intake pipes for insertion into the engine intake ducts.
• the intake ports are provided at said pipes.
• the injection duct comes from the outlet face of the collector housing.
• the injection duct is of rectilinear shape.
• the injection conduit comprises a plurality of injection orifices oriented towards the orifices and / or intake pipes. This allows a better distribution and a good mix of gases.
• the injection orifices are aligned along the injection conduit on at least two lines.
• the injection ports are aligned along the injection line on two lines for injecting the recirculated exhaust gas in two opposite directions, towards each group of intake ducts.
• the injection duct having two axial ends, said injection duct comprises an inlet port of the recirculated exhaust gas flow located between the two ends.
• the injection conduit is configured to deflect the intake gas flow.
• the outer profile of the injection duct thus has a deflector role to properly direct the intake gas into the orifices and / or intake pipes.
• the present invention also proposes a gas intake module in a motor vehicle engine, comprising a heat exchanger and a gas distribution manifold according to the invention.
• FIG. 1 shows an exploded perspective view of an intake module, according to one embodiment of the invention
• FIG. 2 shows a sectional view of the intake module of Figure 1, the cutting plane being orthogonal to the outlet face of the collector housing;
• FIG. 3 shows a sectional view of a gas distribution manifold of the module of Figure 1, the section plane being parallel to the outlet face of the collector housing;
• FIG. 4 represents a perspective view of the gas distribution manifold of the module of FIG. 1.
• FIG. 1 represents an intake module 2. It allows the mixing of a flow of intake gas, generally fresh air, compressed or not and / or cooled or not, and recirculated exhaust gas, cooled or not, with a view to their admission to a cylinder head of a motor vehicle engine, for example of the four-cylinder type, each cylinder comprising two intake valves.
• intake gas generally fresh air, compressed or not and / or cooled or not
• exhaust gas cooled or not
• the intake valves of the cylinders are associated with intake ducts, at the cylinder head, distributed in two groups separated by four ducts each.
• the intake module 2 comprises an inlet box 4 of an intake gas flow in a heat exchanger 6.
• the heat exchanger 6 is arranged to exchange heat with the flow of intake gas flowing in the exchanger.
• the heat exchanger 6 may, for example, be a charge air cooler adapted to cool the engine intake gas.
• the heat exchanger 6 comprises, for example, a heat exchange beam formed by a plurality of exchange elements stacked between two end plates, a bottom plate and a top plate.
• the spaces between the beam exchange elements form channels for driving a flow of gas to be cooled, here the intake gases.
• the beam exchange elements are hollow and conduct a coolant, intended to exchange heat with the flow of gas to be cooled circulating in the fluid conduit channels and thus cool.
• the exchanger is equipped with inlet / outlet pipes allowing the coolant to enter and exit the beam.
• the heat exchanger 6 opens into a distribution manifold 8 intended to be connected to the cylinder head of the engine.
• the distribution manifold 8 allows a distributed inlet, in the cylinder head, of the gas stream coming from the heat exchanger 6.
• the distribution manifold 8 comprises a collector housing 10 guiding, here via eight pipes, the intake gases to the engine cylinder head, through two groups of four separate intake ports 12 each intended for to be connected to the intake ducts of the cylinder head.
• Some of the intake ports 12 are provided at projections 13, intended to be inserted inside the intake ducts. These are in particular the intake ports 12 of a first group, the lower one in the figures. These projections 13 make it possible to ensure a radial seal with the cylinder head while that the seal will be of axial type at the level of the other group of intake ports 12.
• the distribution manifold 8 also comprises an injection conduit 14 for injecting a flow of recirculated exhaust gas into the intake gas flow upstream of the cylinder head.
• the injection conduit 14 is disposed inside the housing 10 so as to be positioned between the two groups of intake ports 12.
• the injection duct 14 comprises injection means in the form of a plurality of injection orifices 16 oriented in the direction of the intake orifices 12.
• the distribution manifold 8 also comprises an intake inlet 18 of a stream of recirculated exhaust gas from an exhaust line of the engine.
• the intake module 2 is in the form of a unitary module integrating the inlet box 4, the heat exchanger 6 and the distribution manifold 8 subject to each other.
• This module is thus intended to be fixed in one piece on the cylinder head of the engine.
• the heat exchanger 6 forms the structural element of the intake module 2, that is to say that it acts as a structural element carrying the module of admission.
• an element preferably metal, has mechanical characteristics enabling it to support the other elements of the module 2, which are attached to it, before fixing the module on the engine.
• the exchanger comprises, for example, a housing, open to the inlet box 4 and the distribution manifold 8, inside which the heat exchange bundle is placed.
• the input box 4 and / or the collector 8 are subject, in particular, to said housing.
• the inlet / outlet pipes for the heat transfer fluid can also be fixed to said housing.
• the collector housing 10 comprises an inlet face 20 of the inlet gas flow into which the exit face of the heat exchange bundle of the exchanger 6 opens and an outlet face 22 intended to be connected to the inlet side of the cylinder head gases.
• the injection duct 14 comes from the outlet face 22 of the collector housing 10.
• the positioning of the injection conduit 14 between the two groups of intake ducts makes it a deflector of the intake gas flow to direct it to the intake ducts.
• this structure of the distribution manifold 8 of the invention therefore does not require to provide a separate deflector.
• FIG. 3 illustrates the structure of the injection conduit 14 in more detail.
• the injection conduit 14 is rectilinear. Preferably, it is positioned in a central / median position relative to the two groups of intake ports 12.
• Injection ports 16, whose number and dimensions are not limited, are aligned along the injection conduit 14 on two lines for injecting the recirculated exhaust gas towards each group of intake ducts.
• 16 are distributed over more than two lines, for example spiral or staggered, etc.
• the injection conduit 14 comprises an inlet orifice 24 corresponding to the intake inlet 18 of the recirculated exhaust gas stream.
• the inlet orifice 24 is located between the two axial ends 26 and 28 of the injection duct 14.
• it is connected to the injection duct 14 at a distance from one of the ends of said duct substantially equal to one quarter of the length of the injection conduit 14.
• the solid arrows of FIG. 4 illustrate the circulation of the recirculated gases from the intake inlet 18 to the injection conduit 14 via the inlet orifice 24. Then, the gases are injected from the orifices of injection 16 to the inlet ports 12, for example in a direction substantially orthogonal to the flow of intake gas, which promotes mixing.

Applications Claiming Priority (2)

Publications (1)

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• 2010
  • 2010-11-08 FR FR1059205A patent/FR2967215B1/fr not_active Expired - Fee Related
• 2011
  • 2011-11-07 CN CN201180064103.9A patent/CN103443439B/zh not_active Expired - Fee Related
  • 2011-11-07 JP JP2013537160A patent/JP5985490B2/ja not_active Expired - Fee Related
  • 2011-11-07 EP EP11778930.5A patent/EP2638275A1/de not_active Withdrawn
  • 2011-11-07 US US13/883,949 patent/US9441578B2/en not_active Expired - Fee Related
  • 2011-11-07 WO PCT/EP2011/069576 patent/WO2012062715A1/fr active Application Filing

Non-Patent Citations (2)

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