EP2115293B1 - System for orientating a recirculated combustion gas flow - Google Patents

System for orientating a recirculated combustion gas flow Download PDF

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Publication number
EP2115293B1
EP2115293B1 EP07848086A EP07848086A EP2115293B1 EP 2115293 B1 EP2115293 B1 EP 2115293B1 EP 07848086 A EP07848086 A EP 07848086A EP 07848086 A EP07848086 A EP 07848086A EP 2115293 B1 EP2115293 B1 EP 2115293B1
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EP
European Patent Office
Prior art keywords
orientating
gas
opening
cavity
linking
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Not-in-force
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EP07848086A
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German (de)
French (fr)
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EP2115293A1 (en
Inventor
Bernard Rollet
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Renault SAS
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Renault SAS
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    • 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient 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
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers

Definitions

  • the present invention relates to a system for directing a flow of combustion gas recirculated in an auxiliary device, for example a chiller, a recirculation circuit of combustion gas.
  • an auxiliary device for example a chiller, a recirculation circuit of combustion gas.
  • Such a system is known of the type comprising a gas inlet opening, a gas outlet opening, two connecting openings adapted to be connected to one another by the cooler, and an inversion system allowing circulating the gas from the inlet opening, before being discharged through the outlet opening, into the cooler in either direction.
  • an orientation system is thus described in the French patent application 05 52 970 of September 30, 2005 .
  • the document DE 101 20 592 A1 discloses a gas orientation system comprising an inlet opening, an outlet opening, two connecting openings adapted to be connected to each other by an auxiliary device, and an inversion system for circulating the gas coming from the inlet opening, before being discharged, through the outlet opening, into the auxiliary device in either direction, as in the preamble of claim 1
  • WO 02/16750 A a bypass valve of an EGR system or the valve is a movable member with two orientation devices.
  • the present invention aims to improve the flow of gases in the orientation system and the impermeability of the orientation system.
  • the system of the aforementioned type is formed by two orientation devices which are isolated from each other, each comprising, on the one hand, a fixed structure which is specific to it and which comprises a hollow cavity. an orientation leading to the common inlet and outlet openings and to a connection opening of its own, and, on the other hand, a movable member of its own, which is arranged in the corresponding orientation cavity, and which is movable between a first connection position in which it communicates the corresponding connection opening with the inlet opening and isolating it from the outlet opening, and a second connection position in which it communicates the corresponding connection opening with the outlet opening and isolates it from the opening of the two orientation devices being arranged relative to one another so that when the movable member of one of the devices is in one of the two connection positions, that of the other device of orientation is in the other of these two positions.
  • connection isolation of the input opening of the first device
  • connection opening associated with the second orientation device communication between the inlet opening and the corresponding connection opening of the second device
  • the cooler in the connection opening associated with the first device of orientation and are evacuated through the exit aperture (communication between the exit aperture and the corresponding connecting aperture of the first device).
  • the present invention therefore effectively cleans all the flue gas circulation lines in the cooler by reversing the coldest end (and therefore the least easily cleaned) of the heat exchanger.
  • a cooling system of combustion gas recirculated in a heat engine comprises a cooler 1 and a gas guidance system 2. More specifically, the present cooler 1 comprises a beam of gas circulation pipes 3 which is disposed inside an enclosure 4 in which circulates a cooling fluid; as a result, the pipe bundle 3 is immersed in the cooling fluid.
  • the chamber 4 comprises a cooling fluid inlet opening 5 and an outlet opening 6. The use of such a cooler 1 makes it possible to reduce the temperature of the gases recirculated before their introduction into the engine.
  • the cooler 1 is in U wherein the two gas circulation ends 8a, 8b are adjacent to each other, the longitudinal ends 8a, 8b being in the same plane.
  • the orientation system 2 comprises a recirculating gas inlet opening 10, an outlet opening 11 of these same gases, and two connecting openings 12a, 12b which are connected to each other by the cooler 1.
  • Each connecting opening 12a, 12b is connected to a gas circulation end 8a, 8b of the cooler 1 which is specific to it.
  • the orientation system 2 also comprises an inversion system 13 which makes it possible to circulate in the cooler 1, in one direction as in the other, the gases coming from the inlet opening 10, before discharging them through the exit opening 11.
  • the inversion system 13 is formed by two orientation devices 14a, 14b which are isolated from each other.
  • Each orientation device 14a, 14b comprises a fixed structure 15a, 15b which is specific to it, and a movable member 16a, 16b which is also specific to it.
  • Each fixed structure 15, 15b has an orientation cavity 17a, 17b which is its own and which opens at the common inlet opening 10, to the common outlet opening 11 and to a connecting opening 12a, 12b which it's clean.
  • Each movable member 16a, 16b is disposed in the corresponding orientation cavity 17a, 17b. It is movable between a first connection position in which it communicates the corresponding connection opening 12a, 12b with the common inlet opening 10 and isolates it from the common outlet opening 11, and a second position of connection in which it communicates the corresponding connection opening 12a, 12b with the common opening output 11 and isolates it from the common input opening 10.
  • the two orientation devices 14a, 14b are arranged relative to each other so that when the movable member 16a, 16b of one of the two orientation devices 14a, 14b is in the one of the two connection positions, the movable member 16b, 16a of the other orientation device 14b, 14a is in the other of these two positions.
  • a movable member 16a, 16b communicates the corresponding connection opening 12a, 12b with the common inlet opening 10 and isolates it from the common outlet opening 11
  • the other movable member 16b, 16a makes communicating the corresponding connection opening 12b, 12a with the common outlet opening 11 and isolating it from the common inlet opening 10.
  • the recirculating gases arrive at the inverting system 13 through the inlet opening 10 and then circulate to meet the movable members 16a, 16b.
  • the gases meeting the movable member 16a, 16b which is in its second connection position, are "trapped” because of the isolation of the inlet opening 10 with respect to the outlet openings 11 and the opening of corresponding link 12a, 12b (orienting device 12b in the background to figures 3 and 7 , and orientation device 12a in the foreground to figures 4 and 8
  • the gases are trapped in a portion of the corresponding orientation cavity 17a, 17b, whereas in the second embodiment, they are trapped before being entered.
  • this regular permutation in the case where the recirculating gases are particularly hot allows to introduce by one or the other of the longitudinal ends 9a, 9b gases whose temperature allows the dissociation of lakes (about 250 ° C) or soot ( about 350 ° C).
  • each orientation cavity 17a, 17b of each orientation device 14a, 14b is delimited by the space that can be occupied by the corresponding movable member 16a, 16b during its displacement.
  • each movable member 16a, 16b is rotatably mounted about an axis of rotation 18a, 18b against which the orientation cavity 17a, 17b has a corresponding symmetry.
  • the two axes of rotation 18a, 18b (and therefore the axes of symmetry) are parallel (more precisely, the two movable members 16a, 16b have the same axis of rotation 18a, 18b.
  • each fixed structure 15a, 15b comprises an inlet cavity 19a, 19b of its own and which connects the orientation cavity 17a, 17b corresponding to the opening common input 10, an outlet cavity 20a, 20b which is specific and which connects the corresponding orientation cavity 17a, 17b to the common outlet opening 11, and a connecting cavity 21a, 21b of its own and which connects the corresponding orientation cavity 17a, 17b to the corresponding connecting opening 12a, 12b.
  • each movable member 16a, 16b is formed by a flap 41a, 41b which extends in a plane passing through the corresponding axis of rotation 18a, 18b.
  • each flap 41a, 41b has a rectangular shape of which one first side 22 perpendicular to the corresponding axis of rotation 18a, 18b, has the same length as the diameter of the corresponding orientation cavity 17a, 17b and a second side 23 perpendicular to the first 22 has the same length as the thickness of the orientation cavity 17a, 17b which is thus cylindrical.
  • each movable member 16a, 16b is formed by a flap 42a, 42b which extends along a main plane 43a, 43b parallel to a central plane 44a, 44b passing through the axis of rotation 18a, Corresponding 18b.
  • each flap 42a, 42b has, in the main plane 43a, 43b, a rectangular shape.
  • a first side 45 of this rectangle of each flap 42a, 42b, perpendicular to the corresponding axis of rotation 18a, 18b, forms a cord on a circle having a diameter identical to that of the corresponding orientation cavity 17a, 17b.
  • a second side 46 perpendicular to the first 45 has the same length as the thickness of the orientation cavity 17a, 17b which is thus cylindrical.
  • the fixed structures 15a, 15b of the two orientation devices 14a, 14b are identical, and they are adjacent to each other. More specifically, the two orientation cavities 17a, 17b are separated from each other by an insulating partition of orientation 24, the two input cavities 19a, 19b are separated from each other by an insulating input partition 25 which extends the insulating partition of orientation 24, the two outlet cavities 20a, 20b are separated from each other by an insulating exit partition 26 which extends the partitions 24 and input insulators 25, and the two connecting cavities 21a, 21b are separated from each other by an insulating connecting partition 27 which the insulating partition 24, input 25 and 26.
  • the various insulating partitions 24,25,26,27 extend perpendicular to the axis of rotation 18a, 18b of the movable members 16a, 16b.
  • the two movable members 16a, 16b are secured to one another by a common shaft 28 which extends along their common axis of rotation 18a, 18b, and the two flaps 16a. , 16b are angularly offset from each other so as to be able to perform the connection position switching.
  • the two movable members 16a, 16b are secured by a disc 48 which is perpendicular to the shaft 28 and which has the same dimensions as the cross section of the orientation cavities 17a, 17b.
  • the first sides 25 form a rope on this disc.
  • each flap 42a, 42b is completed by a cylindrical surface 50 extending on the circular arc corresponding to the string formed by the first side 45.
  • each orientation cavity 17a, 17b is arranged in the following manner: the orifice 29a, 29b opening towards the inlet opening 10 (the orifice 29a, 29b ensuring the connection with the cavity 19a, 19b) is located opposite the orifice 30a, 30b opening towards the outlet opening 10 (the orifice 30a, 3b ensuring the connection with the outlet cavity 20a, 20b) and at 90 ° of the orifice 31a, 31b opening towards the connection opening 12a, 12b corresponding (the orifice 31a, 31b ensuring the connection with the connecting cavity 21a, 21b).
  • the offset angle between the two flaps 41a, 41b is (near) 90 °.
  • the offset angle between the two flaps 42a, 42b is close to 180 ° and the angular sector defined by the rope formed by the first sides 45 is 90 °, therefore, the length of the first sides 45 is equal to the product of the length of the diameter of the disk 48 by half of the square root of 2.
  • the inversion system also makes it possible to short-circuit the chiller 1 when each mobile member 16a, 16b is in an intermediate position halfway.
  • each mobile member 16a, 16b can take two intermediate positions halfway: a direct short-circuit position in which one of the second sides 23 of the flap 41a, 41b is opposite (at the center) of the orifice 29a, 29b opening towards the inlet opening 10 (the other second side 23 lying opposite (in the center) of the orifice 30a, 30b opening towards the outlet opening 11) ( mobile member 14a in the foreground of the figure 5 ), and an indirect short-circuit position in which one of the second sides 23 of the flap 41a, 41b is opposite (in the center) of the orifice 31a, 31b opening towards the corresponding connecting opening 12a, 12b (mobile organ 14b in the background of the figure 5 ).
  • the movable member 16a, 16b of one of the two orientation devices 14a, 14b is in its position of direct short circuit
  • the movable member 16b, 16a of the other orientation device 14b, 14a is in its position of indirect short circuit.
  • the portion of gas flowing in the orientation device 14a, 14b whose movable member is in its direct short-circuit position flows on each side of the flap 41a, 41b and passes directly from the inlet cavity 19a, 19b to the outlet cavity 20a, 20b (majority portion of the gas), and, secondly, the complementary portion of the gas flowing in the other orientation device 14b , 14a is oriented towards the corresponding connecting opening 12b, 12a, bypasses the flap 16b, 16a (via the connecting cavity 21b, 21a) and exits through the outlet cavity 20b, 20a.
  • each movable member 16a, 16b can take two intermediate positions halfway: one in which the second sides 46 of the flap 42a, 42b occupy (entirely) the orifice 31a, 31b opening towards the correspondingly oriented opening 12a, 12b (movable member 16b in the second plane of the figure 9 ), the other in which the second sides 46 of the flap 42a, 42b in a position (entirely) diametrically opposite the orifice 31a, 31b opening towards the corresponding orientation opening 12a, 12b (movable member 16a in the foreground of the figure 9 ).
  • the half-way intermediate position makes it possible to short-circuit the cooler 1 and not to cool the recirculating gases before they are introduced into the engine, which is particularly advantageous during cold engine operation, in particular when it starts.
  • the mode of actuation of the movable members 16a, 16b can be binary, between the two connection positions and the two intermediate positions halfway. In the first embodiment, each of these positions is angularly offset by 45 °, and in the second embodiment, this offset is 90 °.
  • This mode of operation makes it possible, when the engine is cold and the temperature of the gases in recirculation must be maximum, to short-circuit the cooler 1 and, when the engine is sufficiently hot, to cool the gases in recirculation. by circulating them in the cooler 1, in one direction or the other.
  • the operating mode can also be proportional, each movable member 16a, 16b can then take any position between the two connection positions.
  • the proportion of gas recirculating bypassing the cooler 1 depends on the position of the two movable members 16a, 16b: plus the proportion of gas that can pass directly from the inlet cavity 19a, 19b to the outlet cavity 20a, 20b without passing through the cavity of link 21a, 21b is important (the more the movable members 16a, 16b are close to their intermediate position at the respective halfway), the greater the proportion of gas bypassed the chiller 1 is important.
  • the inversion system 13 thus makes it possible to regulate, in this mode of operation, the temperature of the gases recirculated before they are introduced into the engine.
  • one (or both fixed structures) may or may not have an inlet cavity, an outlet cavity, and / or a connecting cavity (the orifices of the orientation cavities opening towards the inlet openings , output and link then opening directly to these openings).
  • the fixed structures have at least one additional cavity (inlet, outlet, connection) to the orientation cavity, in the case, in particular of a separation of these cavities by a partition, the separations could not not be in the extension of each other (the separation being however continuous), for example the different partitions could have different orientations.
  • the two movable members could be physically distinct from one another while being functionally correctly arranged.
  • the insulating partition orientation (disc-shaped) is carried by the common shaft to the two movable members (integrally or partially with in this case the rest of the insulating partition - in the form of crown - carried by the fixed structure).
  • each flap shutters which would extend peripherally and which would be shaped so as to gradually discover the various orifices opening towards the inlet, outlet and connection openings.
  • Such shutters could also be arranged at one or other of these orifices. The shape of these shutters could be triangular arched.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Liquid Crystal (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

The system has an inversion system (13) including orientation devices (14a, 14b), where each device has fixed structures and movable units (16a, 16b) which are arranged in orientation cavities. The units are moved between connection positions in which the units communicate and isolate corresponding connection openings with inlet and outlet openings and from the outlet and inlet openings. The devices are arranged with respect to each other, such that the units of one of the devices are in one of the positions when the units of the other device are in the other position.

Description

La présente invention concerne un système d'orientation d'un flux de gaz de combustion en re-circulation dans un dispositif annexe, par exemple un refroidisseur, d'un circuit de re-circulation de gaz de combustion.The present invention relates to a system for directing a flow of combustion gas recirculated in an auxiliary device, for example a chiller, a recirculation circuit of combustion gas.

On connaît un tel système du type comprenant une ouverture d'entrée des gaz, une ouverture de sortie des gaz, deux ouvertures de liaison adaptées à être reliées l'une à l'autre par le refroidisseur, et un système d'inversion permettant de faire circuler le gaz provenant de l'ouverture d'entrée, avant leur évacuation par l'ouverture de sortie, dans le refroidisseur dans un sens comme dans l'autre. Un tel système d'orientation est ainsi décrit dans la demande de brevet français 05 52 970 du 30 septembre 2005 .Such a system is known of the type comprising a gas inlet opening, a gas outlet opening, two connecting openings adapted to be connected to one another by the cooler, and an inversion system allowing circulating the gas from the inlet opening, before being discharged through the outlet opening, into the cooler in either direction. Such an orientation system is thus described in the French patent application 05 52 970 of September 30, 2005 .

Le document DE 101 20 592 A1 décrit un système d'orientation de gaz comprenant une ouverture d'entrée, une ouverture de sortie, deux ouvertures de liaison adaptées à être reliées l'une à l'autre par un dispositif annexe, et un système d'inversion permettant de faire circuler le gaz provenant de l'ouverture d'entrée, avant leur évacuation, par l'ouverture de sortie, dans le dispositif annexe dans un sens comme dans l'autre, comme dans le préambule de la revendication 1The document DE 101 20 592 A1 discloses a gas orientation system comprising an inlet opening, an outlet opening, two connecting openings adapted to be connected to each other by an auxiliary device, and an inversion system for circulating the gas coming from the inlet opening, before being discharged, through the outlet opening, into the auxiliary device in either direction, as in the preamble of claim 1

Le document WO 02/16750 A une clapet by-pass d'un system EGR ou le clapet est un organe mobile avec deux dispositifs d'orientation.The document WO 02/16750 A a bypass valve of an EGR system or the valve is a movable member with two orientation devices.

La présente invention vise à améliorer l'écoulement des gaz dans le système d'orientation ainsi que l'imperméabilité du système d'orientation.The present invention aims to improve the flow of gases in the orientation system and the impermeability of the orientation system.

Selon l'invention, le système du type précité est formé par deux dispositifs d'orientation qui sont isolés l'un de l'autre, chacun comprenant, d'une part, une structure fixe qui lui est propre et qui comporte une cavité d'orientation débouchant aux ouvertures communes d'entrée et de sortie et à une ouverture de liaison qui lui est propre, et, d'autre part, un organe mobile qui lui est propre, qui est disposé dans la cavité d'orientation correspondante, et qui est mobile entre une première position de connexion dans laquelle il fait communiquer l'ouverture de liaison correspondante avec l'ouverture d'entrée et l'isole de l'ouverture de sortie, et une deuxième position de connexion dans laquelle il fait communiquer l'ouverture de liaison correspondante avec l'ouverture de sortie et l'isole de l'ouverture d'entrée, les deux dispositifs d'orientation étant agencés l'un par rapport à l'autre de sorte que quand l'organe mobile d'un des dispositifs est dans l'une des deux positions de connexion, celui de l'autre dispositif d'orientation est dans l'autre de ces deux positions.According to the invention, the system of the aforementioned type is formed by two orientation devices which are isolated from each other, each comprising, on the one hand, a fixed structure which is specific to it and which comprises a hollow cavity. an orientation leading to the common inlet and outlet openings and to a connection opening of its own, and, on the other hand, a movable member of its own, which is arranged in the corresponding orientation cavity, and which is movable between a first connection position in which it communicates the corresponding connection opening with the inlet opening and isolating it from the outlet opening, and a second connection position in which it communicates the corresponding connection opening with the outlet opening and isolates it from the opening of the two orientation devices being arranged relative to one another so that when the movable member of one of the devices is in one of the two connection positions, that of the other device of orientation is in the other of these two positions.

Quand l'un des organes mobiles est dans sa première position de connexion, l'autre organe mobile est dans sa deuxième position de connexion. De ce fait, les gaz en re-circulation provenant de l'ouverture d'entrée, d'une part, sont acculés dans la cavité d'orientation d'un premier dispositif d'orientation dont l'organe mobile est dans sa deuxième position de connexion (isolation de l'ouverture d'entrée du premier dispositif), et, d'autre part, circulent dans la cavité d'orientation du second dispositif d'orientation dont l'organe mobile est dans sa première position de connexion, puis dans l'ouverture de liaison associée au second dispositif d'orientation (communication entre l'ouverture d'entrée et l'ouverture de liaison correspondante du second dispositif), dans le refroidisseur, dans l'ouverture de liaison associée au premier dispositif d'orientation et sont évacués par l'ouverture de sortie (communication entre l'ouverture de sortie et l'ouverture de liaison correspondante du premier dispositif). En inversant les positions de connexion des deux organes mobiles, le sens de circulation des gaz de refroidissement dans le refroidisseur sont inversés.When one of the movable members is in its first connection position, the other movable member is in its second connection position. As a result, the recirculating gases coming from the inlet opening, on the one hand, are forced into the orientation cavity of a first orientation device whose movable member is in its second position. connection (isolation of the input opening of the first device), and, secondly, flow into the orientation cavity of the second orientation device whose movable member is in its first connection position, and then in the connection opening associated with the second orientation device (communication between the inlet opening and the corresponding connection opening of the second device), in the cooler, in the connection opening associated with the first device of orientation and are evacuated through the exit aperture (communication between the exit aperture and the corresponding connecting aperture of the first device). By reversing the connection positions of the two movable members, the flow direction of the cooling gases in the cooler are reversed.

La présente invention permet donc nettoyer efficacement l'ensemble des conduites de circulation des gaz de combustion dans le refroidisseur en inversant l'extrémité la plus froide (et donc la moins facilement décrassée) de l'échangeur thermique.The present invention therefore effectively cleans all the flue gas circulation lines in the cooler by reversing the coldest end (and therefore the least easily cleaned) of the heat exchanger.

D'autres particularités et avantages apparaîtront dans la description de deux modes de réalisation donnés à titre d'exemples non limitatifs et illustrés aux dessins mis en annexe dans lesquels :

  • La figure 1 est une vue schématique en perspective d'un système d'orientation conforme aux présents modes de réalisation de la présente invention, les organes mobiles des deux dispositifs d'orientation n'étant pas représentés,
  • La figure 2 est une vue schématique en perspective des organes mobiles des deux dispositifs d'orientation selon un premier mode de réalisation,
  • La figure 3 est une vue similaire à la figure 1, les organes mobiles selon la figure 2 étant représentés, l'organe mobile du dispositif d'orientation au premier plan étant dans sa première position de connexion,
  • La figure 4 est une vue similaire à la figure 3, l'organe mobile du dispositif d'orientation au premier plan étant dans sa deuxième position de connexion,
  • La figure 5 est une vue similaire aux figures 3 et 4, l'organe mobile du dispositif d'orientation au premier plan étant dans une position intermédiaire de court-circuit,
  • La figure 6 est une vue schématique en perspective des organes mobiles des deux dispositifs d'orientation selon un second mode de réalisation,
  • La figure 7 est une vue similaire à la figure 3, les organes mobiles représentés étant ceux de la figure 6,
  • La figure 8 est une vue similaire à la figure 7, l'organe mobile du dispositif d'orientation au premier plan étant dans sa deuxième position de connexion, et
  • La figure 9 est une vue similaire aux figures 7 et 8, l'organe mobile du dispositif d'orientation au premier plan étant dans une position intermédiaire de court-circuit.
Other features and advantages will appear in the description of two embodiments given s as non-limiting examples and illustrated in the drawings in an appendix in which:
  • The figure 1 is a schematic perspective view of an orientation system according to the present embodiments of the present invention, the movable members of the two orientation devices not being shown,
  • The figure 2 is a schematic perspective view of the movable members of the two orientation devices according to a first embodiment,
  • The figure 3 is a view similar to the figure 1 , the moving parts according to the figure 2 being represented, the movable member of the foreground orienting device being in its first connection position,
  • The figure 4 is a view similar to the figure 3 the movable member of the foreground orienting device being in its second connecting position,
  • The figure 5 is a view similar to Figures 3 and 4 the movable member of the foreground orienting device being in an intermediate short-circuit position,
  • The figure 6 is a schematic perspective view of the movable members of the two orientation devices according to a second embodiment,
  • The figure 7 is a view similar to the figure 3 , the movable organs represented being those of the figure 6 ,
  • The figure 8 is a view similar to the figure 7 the movable member of the foreground orienting device being in its second connecting position, and
  • The figure 9 is a view similar to Figures 7 and 8 , the movable member of the orientation device in the foreground being in an intermediate position of short circuit.

Comme on peut le voir aux différentes figures un système de refroidissement de gaz de combustion en re-circulation dans un moteur thermique comprend un refroidisseur 1 et un système d'orientation des gaz 2. De façon plus précise, le présent refroidisseur 1 comprend un faisceau de canalisations de circulation des gaz 3 qui est disposé à l'intérieur d'une enceinte 4 dans laquelle circule un fluide de refroidissement ; de ce fait, le faisceau de canalisations 3 baigne dans le fluide de refroidissement. Classiquement, afin de permettre la circulation du fluide de refroidissement, l'enceinte 4 comprend une ouverture d'entrée du fluide de refroidissement 5 et une ouverture de sortie 6. L'utilisation d'un tel refroidisseur 1 permet de réduire la température des gaz en re-circulation avant leur introduction dans le moteur.As can be seen in the various figures, a cooling system of combustion gas recirculated in a heat engine comprises a cooler 1 and a gas guidance system 2. More specifically, the present cooler 1 comprises a beam of gas circulation pipes 3 which is disposed inside an enclosure 4 in which circulates a cooling fluid; as a result, the pipe bundle 3 is immersed in the cooling fluid. Conventionally, in order to allow the circulation of the cooling fluid, the chamber 4 comprises a cooling fluid inlet opening 5 and an outlet opening 6. The use of such a cooler 1 makes it possible to reduce the temperature of the gases recirculated before their introduction into the engine.

Dans les présents modes de réalisation, le refroidisseur 1 est en U dans lequel les deux extrémités de circulation des gaz 8a,8b sont adjacentes l'une à l'autre, les extrémités longitudinales 8a,8b étant dans un même plan.In the present embodiments, the cooler 1 is in U wherein the two gas circulation ends 8a, 8b are adjacent to each other, the longitudinal ends 8a, 8b being in the same plane.

Comme on peut particulièrement bien le voir à la figure 1, le système d'orientation 2 comprend une ouverture d'entrée 10 des gaz en re-circulation, une ouverture de sortie 11 de ces même gaz, et deux ouvertures de liaison 12a,12b qui sont reliées l'une à l'autre par le refroidisseur 1. Chaque ouverture de liaison 12a,12b est reliée à une extrémité de circulation des gaz 8a,8b du refroidisseur 1 qui lui est propre.As can be seen particularly in the figure 1 , the orientation system 2 comprises a recirculating gas inlet opening 10, an outlet opening 11 of these same gases, and two connecting openings 12a, 12b which are connected to each other by the cooler 1. Each connecting opening 12a, 12b is connected to a gas circulation end 8a, 8b of the cooler 1 which is specific to it.

Le système d'orientation 2 comprend également un système d'inversion 13 qui permet de faire circuler dans le refroidisseur 1, dans un sens comme dans l'autre, les gaz provenant de l'ouverture d'entrée 10, avant de les évacuer par l'ouverture de sortie 11.The orientation system 2 also comprises an inversion system 13 which makes it possible to circulate in the cooler 1, in one direction as in the other, the gases coming from the inlet opening 10, before discharging them through the exit opening 11.

Le système d'inversion 13 est formé par deux dispositifs d'orientation 14a,14b qui sont isolés l'un de l'autre. Chaque dispositif d'orientation 14a,14b comprend une structure fixe 15a,15b qui lui est propre, et un organe mobile 16a,16b qui lui est également propre.The inversion system 13 is formed by two orientation devices 14a, 14b which are isolated from each other. Each orientation device 14a, 14b comprises a fixed structure 15a, 15b which is specific to it, and a movable member 16a, 16b which is also specific to it.

Chaque structure fixe 15,15b comporte une cavité d'orientation 17a,17b qui lui est propre et qui débouche à l'ouverture commune d'entrée 10, à l'ouverture commune de sortie 11 et à une ouverture de liaison 12a,12b qui lui est propre.Each fixed structure 15, 15b has an orientation cavity 17a, 17b which is its own and which opens at the common inlet opening 10, to the common outlet opening 11 and to a connecting opening 12a, 12b which it's clean.

Chaque organe mobile 16a,16b est disposé dans la cavité d'orientation 17a,17b correspondante. Il est mobile entre une première position de connexion dans laquelle il fait communiquer l'ouverture de liaison 12a,12b correspondante avec l'ouverture commune d'entrée 10 et l'isole de l'ouverture commune de sortie 11, et une deuxième position de connexion dans laquelle il fait communiquer l'ouverture de liaison 12a,12b correspondante avec l'ouverture commune de sortie 11 et l'isole de l'ouverture commune d'entrée 10.Each movable member 16a, 16b is disposed in the corresponding orientation cavity 17a, 17b. It is movable between a first connection position in which it communicates the corresponding connection opening 12a, 12b with the common inlet opening 10 and isolates it from the common outlet opening 11, and a second position of connection in which it communicates the corresponding connection opening 12a, 12b with the common opening output 11 and isolates it from the common input opening 10.

Par ailleurs, les deux dispositifs d'orientation 14a,14b sont agencés l'un par rapport à l'autre de sorte que quand l'organe mobile 16a,16b d'un des deux dispositifs d'orientation 14a,14b est dans l'une des deux positions de connexion, l'organe mobile 16b,16a de l'autre dispositif d'orientation 14b,14a est dans l'autre de ces deux positions. Ainsi quand un organe mobile 16a,16b fait communiquer l'ouverture de liaison 12a,12b correspondante avec l'ouverture commune d'entrée 10 et l'isole de l'ouverture commune de sortie 11, l'autre organe mobile 16b,16a fait communiquer l'ouverture de liaison 12b,12a correspondante avec l'ouverture commune de sortie 11 et l'isole de l'ouverture commune d'entrée 10.Furthermore, the two orientation devices 14a, 14b are arranged relative to each other so that when the movable member 16a, 16b of one of the two orientation devices 14a, 14b is in the one of the two connection positions, the movable member 16b, 16a of the other orientation device 14b, 14a is in the other of these two positions. Thus when a movable member 16a, 16b communicates the corresponding connection opening 12a, 12b with the common inlet opening 10 and isolates it from the common outlet opening 11, the other movable member 16b, 16a makes communicating the corresponding connection opening 12b, 12a with the common outlet opening 11 and isolating it from the common inlet opening 10.

De ce fait, les gaz en re-circulation arrivent au système d'inversion 13 par l'ouverture d'entrée 10, puis ils circulent jusqu'à rencontrer les organes mobiles 16a,16b.As a result, the recirculating gases arrive at the inverting system 13 through the inlet opening 10 and then circulate to meet the movable members 16a, 16b.

Les gaz rencontrant l'organe mobile 16a,16b qui est dans sa deuxième position de connexion, sont « piégés » du fait de l'isolement de l'ouverture d'entrée 10 par rapport aux ouvertures de sortie 11 et à l'ouverture de liaison correspondante 12a,12b (dispositif d'orientation 12b au second plan aux figures 3 et 7, et dispositif d'orientation 12a au premier plan aux figures 4 et 8) Dans le premier mode de réalisation, les gaz sont piégés dans une partie de la cavité d'orientation 17a,17b correspondante, alors que dans le second mode de réalisation, ils sont piégés avant d'y être entrés.The gases meeting the movable member 16a, 16b which is in its second connection position, are "trapped" because of the isolation of the inlet opening 10 with respect to the outlet openings 11 and the opening of corresponding link 12a, 12b (orienting device 12b in the background to figures 3 and 7 , and orientation device 12a in the foreground to figures 4 and 8 In the first embodiment, the gases are trapped in a portion of the corresponding orientation cavity 17a, 17b, whereas in the second embodiment, they are trapped before being entered.

Au contraire, ceux ayant pénétrés dans le dispositif d'orientation 14b,14a dont l'organe mobile 16b,16a est dans sa première position de connexion, passent par l'ouverture de liaison correspondante 12b,12a (du fait de la connexion entre l'ouverture d'entrée 10 et cette ouverture de liaison 12b,12a - dispositif d'orientation 12a au premier plan aux figures 3 et 7, et dispositif d'orientation 12b au second plan aux figures 4 et 8), circulent dans le refroidisseur 1 en passant d'une extrémité de circulation de gaz 8b,8a à l'autre 8a,8b, puis passent par l'ouverture de liaison 12a,12b du dispositif d'orientation 14a,14b dont l'organe mobile 16a,16b est dans sa deuxième position de connexion, et enfin sortent par l'ouverture de sortie 11 (du fait de la position de l'organe mobile 16a,16b dans sa deuxième position de connexion).On the contrary, those having penetrated in the orientation device 14b, 14a whose movable member 16b, 16a is in its first connection position, pass through the corresponding connection opening 12b, 12a (due to the connection between the inlet opening 10 and this connecting opening 12b, 12a - orienting device 12a in the foreground to figures 3 and 7 , and orientation device 12b in the background to figures 4 and 8 ), circulate in the cooler 1 passing from one gas flow end 8b, 8a to the other 8a, 8b, then pass through the connecting opening 12a, 12b of the orientation device 14a, 14b, the mobile member 16a, 16b is in its second connection position, and finally out through the outlet opening 11 (due to the position of the movable member 16a, 16b in its second connection position).

Ainsi, en permutant les positions de connexion des deux organes mobile 16a,16b, le sens de circulation des gaz dans le faisceau de canalisations 3 est inversé. Ce système d'orientation des gaz 2 permet donc d'introduire dans le refroidisseur 1 les gaz en re-circulation par l'une ou l'autre des extrémités longitudinales 9a,9b de chaque canalisation de circulation des gaz 3. Ainsi, en permutant régulièrement les positions de connexion des deux organes mobiles 16a,16b, la portion la plus froide de chaque canalisation 3 (qui est la plus sujette à un encrassement du à un dépôt de laque d'hydrocarbures imbrûlés et de suie) est alternée, ce qui répartit donc les dépôts aux deux extrémités longitudinales 9a,9b et limite les risques d'obstruction liée à une importante accumulation. De plus, cette permutation régulière dans le cas où les gaz en re-circulation sont particulièrement chauds permet d'introduire par l'une ou l'autre des extrémités longitudinales 9a,9b des gaz dont la température permet la dissociation des laques (environ 250°C) ou des suies (environ 350°C).Thus, by switching the connection positions of the two movable members 16a, 16b, the flow direction of the gas in the pipe bundle 3 is reversed. This system of orientation of the gases 2 thus makes it possible to introduce into the cooler 1 the gases recirculated by one or other of the longitudinal ends 9a, 9b of each gas circulation pipe 3. Thus, by permuting regularly the connection positions of the two movable members 16a, 16b, the coldest portion of each pipe 3 (which is most prone to fouling due to a deposit of unburned hydrocarbon lacquer and soot) is alternated, which thus distributes the deposits at the two longitudinal ends 9a, 9b and limits the risk of obstruction due to a large accumulation. Moreover, this regular permutation in the case where the recirculating gases are particularly hot allows to introduce by one or the other of the longitudinal ends 9a, 9b gases whose temperature allows the dissociation of lakes (about 250 ° C) or soot ( about 350 ° C).

De plus, la cavité d'orientation 17a,17b de chaque dispositif d'orientation 14a,14b est délimitée par l'espace pouvant être occupé par l'organe mobile 16a,16b correspondant lors de son déplacement. Dans les présents modes de réalisation, chaque organe mobile 16a,16b est monté en rotation autour d'un axe de rotation 18a,18b par rapport auquel la cavité d'orientation 17a,17b correspondante présente une symétrie. Ici, les deux axes de rotation 18a,18b (et donc les axes de symétrie) sont parallèles (plus précisément, les deux organes mobiles 16a,16b ont le même axe de rotation 18a,18b.In addition, the orientation cavity 17a, 17b of each orientation device 14a, 14b is delimited by the space that can be occupied by the corresponding movable member 16a, 16b during its displacement. In this s s s mode of embodiment, each movable member 16a, 16b is rotatably mounted about an axis of rotation 18a, 18b against which the orientation cavity 17a, 17b has a corresponding symmetry. Here, the two axes of rotation 18a, 18b (and therefore the axes of symmetry) are parallel (more precisely, the two movable members 16a, 16b have the same axis of rotation 18a, 18b.

De façon plus précise, dans les présents modes de réalisation, chaque structure fixe 15a,15b comprend une cavité d'entrée 19a,19b qui lui est propre et qui relie la cavité d'orientation 17a,17b correspondante à l'ouverture commune d'entrée 10, une cavité de sortie 20a,20b qui lui est propre et qui relie la cavité d'orientation 17a,17b correspondante à l'ouverture commune de sortie 11, et une cavité de liaison 21a,21b qui lui est propre et qui relie la cavité d'orientation 17a,17b correspondante à l'ouverture de liaison 12a,12b correspondante.More specifically, in the present s s s mode of embodiment, each fixed structure 15a, 15b comprises an inlet cavity 19a, 19b of its own and which connects the orientation cavity 17a, 17b corresponding to the opening common input 10, an outlet cavity 20a, 20b which is specific and which connects the corresponding orientation cavity 17a, 17b to the common outlet opening 11, and a connecting cavity 21a, 21b of its own and which connects the corresponding orientation cavity 17a, 17b to the corresponding connecting opening 12a, 12b.

Comme on peut le voir à la figure 2, dans le premier mode de réalisation, chaque organe mobile 16a,16b est formé par un volet 41a,41b qui s'étend selon un plan passant par l'axe de rotation 18a,18b correspondant. Ici, chaque volet 41a,41b a une forme rectangulaire dont un premier côté 22 perpendiculaire à l'axe de rotation 18a,18b correspondant, a la même longueur que le diamètre de la cavité d'orientation 17a,17b correspondante et un second côté 23 perpendiculaire au premier 22 a la même longueur que l'épaisseur de la cavité d'orientation 17a,17b qui est ainsi de forme cylindrique.As can be seen at figure 2 , in the first embodiment, each movable member 16a, 16b is formed by a flap 41a, 41b which extends in a plane passing through the corresponding axis of rotation 18a, 18b. Here, each flap 41a, 41b has a rectangular shape of which one first side 22 perpendicular to the corresponding axis of rotation 18a, 18b, has the same length as the diameter of the corresponding orientation cavity 17a, 17b and a second side 23 perpendicular to the first 22 has the same length as the thickness of the orientation cavity 17a, 17b which is thus cylindrical.

Comme on peut le voir à la figure 6, dans le second mode de réalisation, chaque organe mobile 16a,16b est formé par un volet 42a,42b qui s'étend selon un plan principal 43a,43b parallèle à un plan central 44a,44b passant par l'axe de rotation 18a,18b correspondant. Ici, chaque volet 42a,42b a, dans le plan principal 43a,43b, une forme rectangulaire. Un premier côté 45 de ce rectangle de chaque volet 42a,42b, perpendiculaire à l'axe de rotation 18a,18b correspondant, forme une corde sur un cercle ayant un diamètre identique à celui de la cavité d'orientation 17a,17b correspondante. Un second côté 46 perpendiculaire au premier 45 a la même longueur que l'épaisseur de la cavité d'orientation 17a,17b qui est ainsi de forme cylindrique.As can be seen at figure 6 in the second embodiment, each movable member 16a, 16b is formed by a flap 42a, 42b which extends along a main plane 43a, 43b parallel to a central plane 44a, 44b passing through the axis of rotation 18a, Corresponding 18b. Here, each flap 42a, 42b has, in the main plane 43a, 43b, a rectangular shape. A first side 45 of this rectangle of each flap 42a, 42b, perpendicular to the corresponding axis of rotation 18a, 18b, forms a cord on a circle having a diameter identical to that of the corresponding orientation cavity 17a, 17b. A second side 46 perpendicular to the first 45 has the same length as the thickness of the orientation cavity 17a, 17b which is thus cylindrical.

En outre, dans les présents modes de réalisation les structures fixes 15a,15b des deux dispositifs d'orientation 14a,14b sont identiques, et elles sont adjacentes l'une de l'autre. De façon plus précise, les deux cavités d'orientation 17a,17b sont séparées l'une de l'autre par une cloison isolante d'orientation 24, les deux cavités d'entrées 19a,19b sont séparées l'une de l'autre par une cloison isolante d'entrée 25 qui prolonge la cloison isolante d'orientation 24, les deux cavités de sortie 20a,20b sont séparées l'une de l'autre par une cloison isolante de sortie 26 qui prolonge les cloisons isolantes d'orientation 24 et d'entrée 25, et les deux cavités de liaison 21a,21b sont séparées l'une de l'autre par une cloison isolante de liaison 27 qui les cloisons isolantes d'orientation 24, d'entrée 25 et de sortie 26. Ici, les différentes cloisons isolantes 24,25,26,27 s'étendent perpendiculairement à l'axe de rotation 18a,18b des organes mobiles 16a,16b.In addition, in the present embodiments the fixed structures 15a, 15b of the two orientation devices 14a, 14b are identical, and they are adjacent to each other. More specifically, the two orientation cavities 17a, 17b are separated from each other by an insulating partition of orientation 24, the two input cavities 19a, 19b are separated from each other by an insulating input partition 25 which extends the insulating partition of orientation 24, the two outlet cavities 20a, 20b are separated from each other by an insulating exit partition 26 which extends the partitions 24 and input insulators 25, and the two connecting cavities 21a, 21b are separated from each other by an insulating connecting partition 27 which the insulating partition 24, input 25 and 26. Here, the various insulating partitions 24,25,26,27 extend perpendicular to the axis of rotation 18a, 18b of the movable members 16a, 16b.

Par ailleurs, dans les présents modes de réalisation, les deux organes mobiles 16a,16b sont solidarisés l'un à l'autre par un arbre commun 28 qui s'étend selon leur axe de rotation 18a,18b commun, et les deux volets 16a,16b sont angulairement décalés l'un de l'autre d'une manière à pouvoir réaliser la permutation de position de connexion. En outre, dans le second mode de réalisation, les deux organes mobiles 16a,16b sont solidarisés par un disque 48 qui est perpendiculaire à l'arbre 28 et qui a les mêmes dimensions que la section droite des cavités d'orientations 17a,17b. De ce fait, les premiers côtés 25 forment une corde sur ce disque. En outre, chaque volet 42a,42b est complété par une surface cylindrique 50 s'étendant sur l'arc de cercle correspondant à la corde formée par le premier côté 45.Furthermore, in the present embodiments, the two movable members 16a, 16b are secured to one another by a common shaft 28 which extends along their common axis of rotation 18a, 18b, and the two flaps 16a. , 16b are angularly offset from each other so as to be able to perform the connection position switching. In addition, in the second embodiment, the two movable members 16a, 16b are secured by a disc 48 which is perpendicular to the shaft 28 and which has the same dimensions as the cross section of the orientation cavities 17a, 17b. As a result, the first sides 25 form a rope on this disc. In addition, each flap 42a, 42b is completed by a cylindrical surface 50 extending on the circular arc corresponding to the string formed by the first side 45.

Dans les présents modes de réalisation, chaque cavité d'orientation 17a,17b est agencée de la manière suivante : l'orifice 29a,29b débouchant vers l'ouverture d'entrée 10 (l'orifice 29a,29b assurant la liaison avec la cavité d'entrée 19a,19b) est situé en face de l'orifice 30a,30b débouchant vers l'ouverture de sortie 10 (l'orifice 30a,3b assurant la liaison avec la cavité de sortie 20a,20b) et à 90° de l'orifice 31a,31b débouchant vers l'ouverture de liaison 12a,12b correspondante (l'orifice 31a,31b assurant la liaison avec la cavité de liaison 21a,21b).In the present embodiments, each orientation cavity 17a, 17b is arranged in the following manner: the orifice 29a, 29b opening towards the inlet opening 10 (the orifice 29a, 29b ensuring the connection with the cavity 19a, 19b) is located opposite the orifice 30a, 30b opening towards the outlet opening 10 (the orifice 30a, 3b ensuring the connection with the outlet cavity 20a, 20b) and at 90 ° of the orifice 31a, 31b opening towards the connection opening 12a, 12b corresponding (the orifice 31a, 31b ensuring the connection with the connecting cavity 21a, 21b).

Dans le premier mode de réalisation, l'angle de décalage entre les deux volets 41a,41b est (proche) de 90°. Dans le second mode de réalisation, l'angle de décalage entre les deux volets 42a,42b est proche de 180° et le secteur angulaire défini par la corde formée par les premiers côtés 45 est de 90°, de ce fait, la longueur des premiers côtés 45 est égale au produit de la longueur du diamètre du disque 48 par la moitié de la racine carrée de 2.In the first embodiment, the offset angle between the two flaps 41a, 41b is (near) 90 °. In the second embodiment, the offset angle between the two flaps 42a, 42b is close to 180 ° and the angular sector defined by the rope formed by the first sides 45 is 90 °, therefore, the length of the first sides 45 is equal to the product of the length of the diameter of the disk 48 by half of the square root of 2.

Par ailleurs, dans les présents modes de réalisation, le système d'inversion permet également de court-circuiter le refroidisseur 1 quand chaque organe mobile 16a,16b est dans une position intermédiaire à mi-course.Furthermore, in the present embodiments, the inversion system also makes it possible to short-circuit the chiller 1 when each mobile member 16a, 16b is in an intermediate position halfway.

Dans le premier mode de réalisation, chaque organe mobile 16a,16b peut prendre deux positions intermédiaires à mi-course : une position de court-circuit direct dans laquelle l'un des seconds côtés 23 du volet 41a,41b se trouve en face (au centre) de l'orifice 29a,29b débouchant vers l'ouverture d'entrée 10 (l'autre second côté 23 se trouvant en face (au centre) de l'orifice 30a,30b débouchant vers l'ouverture de sortie 11) (organe mobile 14a au premier plan de la figure 5), et une position de court-circuit indirect dans laquelle l'un des seconds côtés 23 du volet 41a,41b se trouve en face (au centre) de l'orifice 31a,31b débouchant vers l'ouverture de liaison 12a,12b correspondante (organe mobile 14b au second plan de la figure 5). Quand l'organe mobile 16a,16b d'un des deux dispositifs d'orientation 14a,14b est dans sa position de court-circuit direct, l'organe mobile 16b,16a de l'autre dispositif d'orientation 14b,14a est dans sa position de court-circuit indirect.In the first embodiment, each mobile member 16a, 16b can take two intermediate positions halfway: a direct short-circuit position in which one of the second sides 23 of the flap 41a, 41b is opposite (at the center) of the orifice 29a, 29b opening towards the inlet opening 10 (the other second side 23 lying opposite (in the center) of the orifice 30a, 30b opening towards the outlet opening 11) ( mobile member 14a in the foreground of the figure 5 ), and an indirect short-circuit position in which one of the second sides 23 of the flap 41a, 41b is opposite (in the center) of the orifice 31a, 31b opening towards the corresponding connecting opening 12a, 12b (mobile organ 14b in the background of the figure 5 ). When the movable member 16a, 16b of one of the two orientation devices 14a, 14b is in its position of direct short circuit, the movable member 16b, 16a of the other orientation device 14b, 14a is in its position of indirect short circuit.

En position intermédiaire à mi-course, d'une part, la portion de gaz circulant dans le dispositif d'orientation 14a,14b dont l'organes mobile est dans sa position de court-circuit direct circule de chaque côté du volet 41a,41b et passe directement de la cavité d'entrée 19a,19b à la cavité de sortie 20a,20b (portion majoritaire des gaz), et, d'autre part, la portion complémentaire des gaz qui circule dans l'autre dispositif d'orientation 14b,14a est orientée vers l'ouverture de liaison 12b,12a correspondante, contourne le volet 16b,16a (via la cavité de liaison 21b,21a) et sort par la cavité de sortie 20b,20a.In intermediate position halfway, on the one hand, the portion of gas flowing in the orientation device 14a, 14b whose movable member is in its direct short-circuit position flows on each side of the flap 41a, 41b and passes directly from the inlet cavity 19a, 19b to the outlet cavity 20a, 20b (majority portion of the gas), and, secondly, the complementary portion of the gas flowing in the other orientation device 14b , 14a is oriented towards the corresponding connecting opening 12b, 12a, bypasses the flap 16b, 16a (via the connecting cavity 21b, 21a) and exits through the outlet cavity 20b, 20a.

Dans le second mode de réalisation, chaque organe mobile 16a,16b peut prendre deux positions intermédiaires à mi-course : l'une dans laquelle les seconds côtés 46 du volet 42a,42b occupe (entièrement) l'orifice 31a,31b débouchant vers l'ouverture d'orientation correspondante 12a,12b (organe mobile 16b au second plan de la figure 9), l'autre dans laquelle les seconds côtés 46 du volet 42a,42b dans une position (entièrement) diamétralement opposée à l'orifice 31a,31b débouchant vers l'ouverture d'orientation correspondante 12a,12b (organe mobile 16a au premier plan de la figure 9). Quand l'organe mobile 16a,16b d'un des deux dispositifs d'orientation 14a,14b est dans une position de court-circuit direct, l'organe mobile 16b,16a de l'autre dispositif d'orientation 14b,14a est dans l'autre position de court-circuit.In the second embodiment, each movable member 16a, 16b can take two intermediate positions halfway: one in which the second sides 46 of the flap 42a, 42b occupy (entirely) the orifice 31a, 31b opening towards the correspondingly oriented opening 12a, 12b (movable member 16b in the second plane of the figure 9 ), the other in which the second sides 46 of the flap 42a, 42b in a position (entirely) diametrically opposite the orifice 31a, 31b opening towards the corresponding orientation opening 12a, 12b (movable member 16a in the foreground of the figure 9 ). When the movable member 16a, 16b of one of the two orientation devices 14a, 14b is in a direct short-circuit position, the movable member 16b, 16a of the other orientation device 14b, 14a is in the other short-circuit position.

En position intermédiaire à mi-course, les gaz circulant dans les dispositifs d'orientation 14a,14b passent directement de la cavité d'entrée 19a,19b à la cavité de sortie 20a,20b, aucun volet 42a,42b ne gênant leur écoulement.In an intermediate position halfway, the gases flowing in the orientation devices 14a, 14b pass directly from the inlet cavity 19a, 19b to the outlet cavity 20a, 20b, no flap 42a, 42b impeding their flow.

Ainsi, la position intermédiaire à mi-course permet de court-circuiter le refroidisseur 1 et de ne pas refroidir les gaz en re-circulation avant leur introduction dans le moteur, ce qui est particulièrement avantageux lors d'un fonctionnement froid du moteur, notamment lors de son démarrage.Thus, the half-way intermediate position makes it possible to short-circuit the cooler 1 and not to cool the recirculating gases before they are introduced into the engine, which is particularly advantageous during cold engine operation, in particular when it starts.

Le mode d'actionnement des organes mobiles 16a,16b peut être binaire, entre les deux positions de connexion et les deux positions intermédiaires à mi-course. Dans le premier mode de réalisation, chacune de ces positions est décalée angulairement de 45°, et, dans le second mode de réalisation, ce décalage est de 90°. Ce mode d'actionnement permet, lorsque le moteur est froid et que la température des gaz en re-circulation doit être maximale, de court-circuiter le refroidisseur 1 et, lorsque le moteur est suffisamment chaud, de refroidir les gaz en re-circulation en les faisant circuler dans le refroidisseur 1, dans un sens ou dans l'autre.The mode of actuation of the movable members 16a, 16b can be binary, between the two connection positions and the two intermediate positions halfway. In the first embodiment, each of these positions is angularly offset by 45 °, and in the second embodiment, this offset is 90 °. This mode of operation makes it possible, when the engine is cold and the temperature of the gases in recirculation must be maximum, to short-circuit the cooler 1 and, when the engine is sufficiently hot, to cool the gases in recirculation. by circulating them in the cooler 1, in one direction or the other.

Le mode d'actionnement peut également être proportionnel, chaque organe mobile 16a,16b pouvant alors prendre toute position entre les deux positions de connexion. Dans un tel mode d'actionnement, la proportion de gaz en re-circulation court-circuitant le refroidisseur 1 dépend de la position des deux organes mobiles 16a,16b : plus la proportion de gaz pouvant passer directement de la cavité d'entrée 19a,19b à la cavité de sortie 20a,20b sans passer par la cavité de liaison 21a,21b correspondante est importante (plus les organes mobiles 16a,16b sont proches de leur position intermédiaire à mi-course respective), plus la proportion de gaz ayant court-circuité le refroidisseur 1 est important. Le système d'inversion 13 permet donc de réguler, dans ce mode de fonctionnement, la température des gaz en re-circulation avant leur introduction dans le moteur.The operating mode can also be proportional, each movable member 16a, 16b can then take any position between the two connection positions. In such an actuation mode, the proportion of gas recirculating bypassing the cooler 1 depends on the position of the two movable members 16a, 16b: plus the proportion of gas that can pass directly from the inlet cavity 19a, 19b to the outlet cavity 20a, 20b without passing through the cavity of link 21a, 21b is important (the more the movable members 16a, 16b are close to their intermediate position at the respective halfway), the greater the proportion of gas bypassed the chiller 1 is important. The inversion system 13 thus makes it possible to regulate, in this mode of operation, the temperature of the gases recirculated before they are introduced into the engine.

La présente invention n'est pas limitée au mode de réalisation décrit en liaison avec les figures.The present invention is not limited to the embodiment described in connection with the figures.

Il serait possible d'avoir des structures fixes ayant des formes différentes l'une de l'autre, et/ou pouvant ne pas être adjacentes l'une de l'autre. De plus, l'une (ou les deux structures fixes) pourrait avoir ou non une cavité d'entrée, une cavité de sortie, et/ou une cavité de liaison (les orifices des cavités d'orientation débouchant vers les ouvertures d'entrée, de sortie et de liaison débouchant alors directement à ces ouvertures). En outre, dans le cas de deux structures fixes adjacentes, celles-ci pourraient être séparées l'une de l'autre par autre chose que de simples cloisons. Par ailleurs, dans le cas où les structures fixes présentent au moins une cavité supplémentaire (entrée, sortie, liaison) à la cavité d'orientation, dans le cas, notamment d'une séparation de ces cavités par une cloison, les séparations pourraient ne pas être dans le prolongement l'une de l'autre (la séparation étant toutefois continue), par exemple les différentes cloisons pourraient avoir des orientations différentes.It would be possible to have fixed structures having different shapes from each other, and / or not being adjacent to each other. In addition, one (or both fixed structures) may or may not have an inlet cavity, an outlet cavity, and / or a connecting cavity (the orifices of the orientation cavities opening towards the inlet openings , output and link then opening directly to these openings). In addition, in the case of two adjacent fixed structures, they could be separated from each other by other than simple partitions. Furthermore, in the case where the fixed structures have at least one additional cavity (inlet, outlet, connection) to the orientation cavity, in the case, in particular of a separation of these cavities by a partition, the separations could not not be in the extension of each other (the separation being however continuous), for example the different partitions could have different orientations.

Il serait également possible que les deux organes mobiles soient matériellement distincts l'un de l'autre tout en étant fonctionnellement correctement agencés. Dans le cas de deux organes mobiles fixes l'un par rapport à l'autre, comme dans le mode de réalisation présenté ci-dessus, il serait possible que la cloison isolante d'orientation (en forme de disque) soit portée par l'arbre commun aux deux organes mobiles (intégralement ou partiellement avec dans ce cas le reste de la cloison isolante - sous forme de couronne - portée par la structure fixe).It would also be possible for the two movable members to be physically distinct from one another while being functionally correctly arranged. In the case of two movable members fixed relative to each other, as in the embodiment presented above, it is possible that the insulating partition orientation (disc-shaped) is carried by the common shaft to the two movable members (integrally or partially with in this case the rest of the insulating partition - in the form of crown - carried by the fixed structure).

Il serait aussi possible, afin d'accroître la variation de la proportion de gaz court-circuitant le refroidisseur pour les positions des organes mobiles proches des positions de connexion, d'adjoindre aux seconds côtés de chaque volet des obturateurs qui s'étendraient périphériquement et qui seraient conformés de façon à découvrir progressivement les différents orifices débouchant vers les ouvertures d'entrée, de sortie et de liaison. De tels obturateurs pourraient également être disposés à l'un ou l'autre des ces orifices. La forme de ces obturateurs pourrait être triangulaire cintrée.It would also be possible, in order to increase the variation of the proportion of gas bypassing the cooler for the positions of the movable members close to the connection positions, to add to the second sides of each flap shutters which would extend peripherally and which would be shaped so as to gradually discover the various orifices opening towards the inlet, outlet and connection openings. Such shutters could also be arranged at one or other of these orifices. The shape of these shutters could be triangular arched.

Claims (15)

  1. Gas orientating system (2), comprising an inlet opening (10), an outlet opening (11), two linking openings (12a, 12b) which are suitable for linking to one another by an ancillary device (1), and a reversal system (13) making it possible for the gas coming from the inlet opening (10), before being discharged through the outlet opening (11), to flow in the ancillary device in one direction and the other, characterized in that the reversal system (13) is formed by two orientating devices (14a, 14b) which are isolated from one another, each comprising a fixed structure (15a, 15b) which is inherent to it and has an orientating cavity (17a, 17b) opening at the common inlet (10) and outlet (11) openings and at a linking opening (12a, 12b) which is inherent to it, and also a moveable member (16a, 16b) which is inherent to it, is located in the corresponding orientating cavity (17a, 17b) and is able to move between a first connecting position, in which it connects the corresponding linking opening (12a, 12b) to the inlet opening (10) and isolates it from the outlet opening (11), and a second connecting position, in which it connects the corresponding linking opening (12a, 12b) to the outlet opening (11) and isolates it from the inlet opening (10), the two orientating devices (14a, 14b) being arranged with respect to one another such that when the moveable member (16a, 16b) of one of the devices (14a, 14b) is in one of the two connecting positions, the moveable member (16b, 16a) of the other device (14b, 14a) is in the other of these two positions.
  2. Gas orientating system (2) according to Claim 1, characterized in that the orientating cavity (17a, 17b) of each orientating device (14a, 14b) is delimited by the space that can be occupied by the corresponding moveable member (16a, 16b) while it moves.
  3. Gas orientating system (2) according to Claim 2, characterized in that the moveable member (16a, 16b) of each orientating device (14a, 14b) is mounted able to rotate about a rotational axis (18a, 18b) with respect to which the corresponding orientating cavity (17a, 17b) is symmetrical.
  4. Gas orientating system (2) according to Claim 3, characterized in that the two moveable members (16a, 16b) are secured to one another by a common shaft (28) extending along their identical rotational axis (18a, 18b).
  5. Gas orientating system (2) according to Claim 4, characterized in that each moveable member (16a, 16b) is formed by a rectangular leaf (41a, 41b), each linking cavity (17a, 17b) having the form of a cylinder, the diameter of which corresponds to the length of a first side (22) of the leaf (41a, 41b) perpendicular to the corresponding rotational axis (18a, 18b) and the thickness of which corresponds to the length of a second side (23) perpendicular to the first (22).
  6. Gas orientating system (2) according to Claim 5, dependent on Claim 4, characterized in that the two leaves (16a, 16b) are offset angularly from one another at an angle of around 90°.
  7. Gas orientating system (2) according to Claim 4, characterized in that each moveable member (16a, 16b) is formed by a leaf (42a, 42b) which extends in a main plane (43a, 43b) parallel to a central plane (44a, 44b) passing through the rotational axis (18a, 18b), each linking cavity (17a, 17b) having the form of a cylinder, the diameter of which corresponds to the root of twice the length of a first side (22) of the leaf (42a, 42b) perpendicular to the rotational axis (18a, 18b) and the thickness of which corresponds to the length of a second side (23) perpendicular to the first (22).
  8. Gas orientating system (2) according to Claim 7, dependent on Claim 4, characterized in that the two leaves (16a, 16b) are offset angularly from one another at an angle of around 180°.
  9. Gas orientating system (2) according to one of Claims 1 to 8, characterized in that the fixed structures (15a, 15b) of the two orientating devices (14a, 14b) are identical and adjacent to one another.
  10. Gas orientating system (2) according to Claim 9, characterized in that the two orientating cavities (17a, 17b) are separated from one another by an orientating isolating partition (24).
  11. Gas orientating system (2) according to Claim 10, dependent on one of Claims 3 to 8, characterized in that the orientating isolating partition (24) extends perpendicularly to the rotational axis (18a, 18b) of the moveable members (16a, 16b).
  12. Gas orientating system (2) according to Claim 11, dependent on one of Claims 4 to 8, characterized in that the orientating isolating partition (24) is supported by the common shaft (28) of the two moveable members (16a, 16b).
  13. Gas orientating system (2) according to one of Claims 1 to 12, characterized in that each orientating device (14a, 14b) comprises an inlet cavity (19a, 19b), an outlet cavity (20a, 20b), and a linking cavity (21a, 21b) which are inherent to it and which link the orientating cavity (17a, 17b) to, respectively, the common inlet opening (10), the common outlet opening (11) and the corresponding linking opening (12a, 12b).
  14. Gas orientating system (2) according to Claim 13, dependent on one of Claims 10 to 12, characterized in that the two inlet cavities (19a, 19b), the two outlet cavities (20a, 20b), and the two linking cavities (21a, 21b) are separated from one another by, respectively, an inlet isolating partition (25), an outlet isolating partition (26) and a linking isolating partition (27).
  15. Gas orientating system (2) according to Claim 14, dependent on one of Claims 10 to 12, characterized in that the inlet isolating partition (25), the outlet isolating partition (26) and the linking isolating partition (27) extend the orientating isolating partition (24).
EP07848086A 2007-01-19 2007-12-12 System for orientating a recirculated combustion gas flow Not-in-force EP2115293B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0700383A FR2911638B1 (en) 2007-01-19 2007-01-19 SYSTEM FOR ORIENTATION OF A FLOW OF COMBUSTION GAS IN RE-CIRCULATION
PCT/EP2007/063839 WO2008101560A1 (en) 2007-01-19 2007-12-12 System for orientating a recirculated combustion gas flow

Publications (2)

Publication Number Publication Date
EP2115293A1 EP2115293A1 (en) 2009-11-11
EP2115293B1 true EP2115293B1 (en) 2010-10-27

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EP07848086A Not-in-force EP2115293B1 (en) 2007-01-19 2007-12-12 System for orientating a recirculated combustion gas flow

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EP (1) EP2115293B1 (en)
AT (1) ATE486210T1 (en)
DE (1) DE602007010186D1 (en)
FR (1) FR2911638B1 (en)
WO (1) WO2008101560A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007038882A1 (en) 2007-08-17 2009-02-19 Pierburg Gmbh Exhaust gas cooling device for an internal combustion engine
DE102010006038B4 (en) * 2010-01-27 2013-10-24 Pierburg Gmbh Device for regulating a fluid flow
FR2979124B1 (en) * 2011-08-18 2015-10-09 Wevista EGR EXCHANGER WITH INTEGRATED VALVE
CN104503076B (en) * 2014-11-28 2017-02-08 歌尔科技有限公司 Micro display eyepiece and head-mounted equipment

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Publication number Priority date Publication date Assignee Title
FR2808302B1 (en) * 2000-04-28 2005-09-23 Toyota Motor Co Ltd EXHAUST GAS PURIFIER FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR PURIFYING EXHAUST GAS
US6378509B1 (en) * 2000-06-13 2002-04-30 Caterpillar Inc. Exhaust gas recirculation system having multifunction valve
DE10041579A1 (en) * 2000-08-24 2002-03-07 Siemens Automotive Corp Lp Valve arrangement with double flap and thermal bridge for an exhaust gas recirculation system and method for its operation
DE10222919B4 (en) * 2002-05-24 2007-12-20 Man Nutzfahrzeuge Ag Two-stage supercharged internal combustion engine

Also Published As

Publication number Publication date
ATE486210T1 (en) 2010-11-15
FR2911638B1 (en) 2009-03-13
EP2115293A1 (en) 2009-11-11
WO2008101560A1 (en) 2008-08-28
DE602007010186D1 (en) 2010-12-09
FR2911638A1 (en) 2008-07-25

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