EP2786007B1 - Valve for a gas flow circuit in a vehicle - Google Patents

Valve for a gas flow circuit in a vehicle Download PDF

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Publication number
EP2786007B1
EP2786007B1 EP12816689.9A EP12816689A EP2786007B1 EP 2786007 B1 EP2786007 B1 EP 2786007B1 EP 12816689 A EP12816689 A EP 12816689A EP 2786007 B1 EP2786007 B1 EP 2786007B1
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EP
European Patent Office
Prior art keywords
valve
flap
outlet
gas
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12816689.9A
Other languages
German (de)
French (fr)
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EP2786007A1 (en
Inventor
Benoît MAURICE
Yoann Lemarchand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes de Controle Moteur SAS
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Valeo Systemes de Controle Moteur SAS
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Publication of EP2786007A1 publication Critical patent/EP2786007A1/en
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Publication of EP2786007B1 publication Critical patent/EP2786007B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6416—With heating or cooling of the system
    • Y10T137/6579—Circulating fluid in heat exchange relationship

Definitions

  • the invention relates to a control valve for a flow of gas flowing in a gas circuit of a motor vehicle.
  • motor vehicles operating with a heat engine implement a gas circuit for supplying said engine during certain phases of use of the vehicle.
  • a gas circuit has an air intake captured outside the vehicle, and comprises a gas supply circuit located upstream of the engine and an exhaust circuit located downstream of said engine to evacuate the gases. burned.
  • a first outlet is provided for directly conveying the burnt gases to the supply circuit located upstream of the engine, and a second outlet is designed to previously direct said burnt gases to the cooler to cool beforehand before they arrive. in said supply circuit.
  • These valves are equipped with a rotary shutter, pivotable between a first position for which it closes the second outlet and causes the passage of gas to the first outlet, and a second position for which it closes the first outlet and causes the passage gases to the second exit.
  • the rotation of the shutter is controlled and is performed automatically from a central computing unit that sends a suitable electrical signal at the appropriate time.
  • the current valves have a flap dimensioned in a somewhat limited way so that it can pivot easily in the valve, so that the flap leaves gaps of passage of the gas at the level of the duct that is supposed to close, said interstices being rather localized around this component. This results in an approximate and poorly controlled operation of the EGR loops, which may affect the operation of the engine gas supply circuit.
  • valves according to the invention implement a flap associated with a particular internal structure of said valve, said flap and said interacting structure to ensure a perfect seal of the flap in at least one of its closed positions.
  • the opening and closing phases of the valve are clean, without leaving any fraction of residual gas, thus making the gas supply circuit perfectly reliable and fully effective.
  • the invention relates to a valve for regulating a gas flow in an EGR loop of a gas supply circuit of a vehicle engine, comprising a gas inlet, a first gas outlet for directly conveying the gas in the supply circuit, and a second gas outlet for passing said gases in a conduit passing through a cooler before injecting them into said supply circuit, said valve having a rotatable flap adapted to pivot between a first position for which it closes the second output while opening the first output, and a second position for which it closes the first output while opening the second output.
  • the flap comprises a planar main body adapted to open or close the duct, the internal structure of the valve having a plane flange, so that the main body of the flap comes in plane bearing against said flange. when said component is in its second position.
  • the flap of the valve according to the invention makes it possible to open an outlet and simultaneously close the other outlet, and vice versa.
  • the valve according to the invention has thus undergone a dual arrangement, at the level of both the duct and the shutter, so that the main body of the shutter comes into plane contact with the duct, to ensure sealed opening of the second outlet, without loss of gas to the first outlet.
  • the valve can flow cleanly and thus without loss, exhaust gases to the cooler of the EGR loop, before sending them into the main gas supply circuit of the engine.
  • the conduit forms a loop with an inlet extending the second outlet of the valve and an outlet opening at the first outlet of said valve
  • the flap may have a secondary secondary body in continuity with the main body, said flap being positioned in the valve so that it can pivot about an axis of rotation placed between the main body and the secondary body. It is assumed that the main body and the secondary body are rigidly connected to each other.
  • the main body of the shutter closes the duct allowing the passage of the exhaust gas to the cooler, the secondary body also partly closes the outlet of said duct, and when said main body opens said duct, the secondary flap releases the outlet of this duct .
  • the main body and the secondary body of the shutter can be represented by two separate parts, or can be a single piece.
  • the main body extends in a direction perpendicular to the axis of rotation, while the secondary body extends in a direction parallel to said axis of rotation.
  • the two lateral edges of the main body each have a relief, the internal structure of the valve having complementary reliefs, so that the reliefs of the main body come into bearing against the complementary reliefs of said structure to ensure sealing of the conduit.
  • the lateral edges of the main body of the flap are located symmetrically on either side of the longitudinal axis of said main body. This complementarity of the reliefs allows the shutter to ensure at its main body closure of the conduit with a maximized seal.
  • a valve according to the invention thus has a flap for sealing the duct, and a sealed opening of said duct, without loss of gas to the first outlet.
  • a relief can just as easily be materialized by a hollow or a projecting element.
  • the complementary reliefs are positioned at the periphery of an orifice of the internal structure of the valve.
  • the complementary relief or reliefs can be obtained by machining the internal structure of the valve.
  • the reliefs of the main body are represented by two elongated protuberances extending laterally along said body, each protuberance having a rounded section, the complementary reliefs being materialized by parts hollowed in the internal structure of the valve.
  • the essential for this configuration is that the protuberances are placed in said excavated parts, to ensure a close contact between the internal structure and the flap.
  • the fact that the protuberances have a rounded shape privileges the sealing conditions by avoiding introducing angles that could be sources of gas passage.
  • each protuberance and which is furthest from the secondary body is rounded, to best fit the excavated parts of the internal structure of the valve. These additional rounded portions further accentuate the sealing conditions between the flap and the entrance of the duct.
  • the main body and the two protuberances are made in one piece, said protuberances corresponding to two stamped areas of the main body.
  • This shutter configuration is the simplest and fastest to manufacture. Stamping is an operation that also makes it possible to obtain a part having a precise geometry.
  • the free end of the secondary body and which is farthest from the main body is delimited by a rectilinear flange extending parallel to the axis of rotation, said end being beveled.
  • this end is gradually refined to end with an edge.
  • This bevel therefore makes it possible to increase the amplitude of rotation of the flap, so that it occupies a satisfactory position for which it will ensure the opening of the duct without loss of gas and ensure a tight closure of the first outlet.
  • the bevel can also reduce the clearance between the end of the flap and the bar.
  • the shutter is made of sheet metal. This material provides a certain flexibility to the flap, which can thus deform slightly in contact with the duct, to fully ensure its sealing function when opening or closing said duct.
  • valves according to the invention have the advantage of operating properly, both during the closing phase of the duct and during its opening phase, by providing increased sealing by means of judicious adjustments, simple and fast to put implemented, and therefore inexpensive. Indeed, these arrangements consist of making small machining retouches at the entrance of the duct and to slightly modify the geometry of the shutter, so that the interaction of the shutter with the duct is optimized.
  • a valve 1 is a valve of an EGR loop implanted in a gas supply circuit of a motor vehicle engine.
  • An EGR loop deflects part of the exhaust gases from the engine, to reroute them in the part of the feed circuit located upstream of the engine, so that the supply of said engine is carried out with a mixture of air and flue gas.
  • An EGR valve 1 is generally coupled to a gas cooler 2, designed to pre-cool the exhaust gases of said loop before routing them into the engine gas supply circuit, this cooling being sought only on certain operating ranges of the engine. In other words, it is not necessary to continuously cool the gases of the EGR loop.
  • a valve 1 according to the invention comprises an air inlet 3, a first gas outlet 4 for conveying them directly into the supply circuit, and a second outlet 5 for passing said gases through a duct 6 passing through the cooler. 2 before injecting them into said supply circuit.
  • the duct 6 defines a gas circulation loop passing through the cooler 2, said duct 6 having an inlet 19 extending the second outlet 5 of the valve 1, and an outlet opening at the first outlet 4 of said valve 1.
  • the valve 1 is provided with a shutter 7 pivotally mounted, provided to adopt a first position for which it closes the second outlet 5 of the valve 1, while opening the first outlet 4, and a second position for which it closes the first output 4 while opening the second output 5 of said valve.
  • the rotational movement of the shutter 7 is automatically controlled by a central computing unit.
  • the figure 1 shows the flap 7 in its second position, for which it allows the passage of gases in the duct 6 passing through the cooler 2 in the direction indicated by the arrows 8.
  • the figure 2 shows the flap 7 in its first position, for which it closes the duct 6 to direct the gas directly to the engine supply circuit, in the direction indicated by the arrows 9.
  • the maximum rotation amplitude of the flap 7 between the first and second position is less than or equal to 90 °.
  • the axis of rotation of the flap 7 is represented by two aligned cylindrical pins 10 facing each other and implanted in the internal structure of the valve 1.
  • the flap 7 of a valve 1 comprises a main body 11 plane and a secondary body 12 plane, the two bodies 11,12 being in continuity with one another and interconnected rigidly.
  • the main body 11 has a thin, rectangular, rectangular wall 13 and two parallel protuberances 14 extending along a longitudinal axis of the wall 13, said protuberances 14 embodying the two lateral edges of the main body 11 relative to a central longitudinal axis of said wall.
  • the two protuberances 14 are identical and are each comparable to a corrugated edge having an S-shaped section.
  • the rectangular wall 13 and the two lateral protuberances 14 constitute the same part, said protuberances being made by stamping.
  • the secondary body 12 also has a flat, rectangular wall 15, having the same thickness as that of the wall 13 of the main cylindrical body 11, and is arranged perpendicularly to the main body 11. In other words, a large side of the wall 13 of the body main 11 is perpendicular to a large side of the wall 15 of the secondary body 12.
  • the secondary body 12 is centered relative to the main body 11, so that the central longitudinal axis of the main body 11 intersects the two large sides of the secondary body 12 in their middle.
  • the secondary body 12 is extended by a rectangular projection 16, the largest dimension of which is equal to the width of the main body 11, the secondary body 12 being connected to the main body 11 via this advance 16.
  • this end 17 gradually decreases in thickness and ends with a ridge 18.
  • the end 21 free of each protrusion 14, which is the end farthest from the secondary body 12, is rounded.
  • the flap 7 is placed in the valve 1, so that the two cylindrical pins 10 embodying its axis of rotation are found between the main body 11 and the secondary body 12 of the flap 7.
  • the flap 7 When the flap 7 is in its second position, corresponding to an occultation of the duct 6, the secondary body partially closes the outlet of said duct 6 opening at the first outlet 4 of the valve 1.
  • the internal structure 19 of the valve 1 for passing the gas from the valve 1 to the cooler 2 has been machined so as to have a plane flange 20 allowing the main body 11 of the flap 7 to abut plane against said flange 20, when the flap 7 is in its second position for which it fully opens the second outlet 5 of the valve 1 and closes the first outlet 4.
  • the periphery of the internal structure of the valve 1, against which is intended to come to be pressed the main body 11 of the flap 7 when said flap 7 is found in its first position 4 corresponding to a closure of the duct 6, has also been machined to reveal surface elements 22 worked, slightly hollowed, substantially having a geometry complementary to that of the protuberances 14 of the flap 7.
  • valve 1 and the cooler 2 are separated by a wall comprising a bar 23 projecting.
  • the flap 7 moves in rotation from its first position to its second position, the beveled end 17 of the secondary body 12 of the flap 7 is brought, at the end of the stroke, to come into contact with said bar 23.
  • the fact that this end ends with a bevel defined by a thin edge 18 allows to extend by a few degrees the amplitude of rotation of said flap 7, avoiding that said end 17 comes too early to lock against said bar 23.
  • the flap 7 can perform a complete rotation allowing it to occupy its second position by providing a complete seal, without gas leakage to the first outlet 4 of the valve 1.
  • a clearance can remain between the beveled end 17 of the secondary body 12 of the flap and the bar 23.

Description

L'invention se rapporte à une vanne de régulation d'un débit de gaz circulant dans un circuit de gaz d'un véhicule automobile.The invention relates to a control valve for a flow of gas flowing in a gas circuit of a motor vehicle.

Généralement, les véhicules automobiles fonctionnant avec un moteur thermique mettent en oeuvre un circuit de gaz destiné à alimenter ledit moteur lors de certaines phases d'utilisation du véhicule. Un tel circuit dispose d'une entrée d'air capté à l'extérieur du véhicule, et comprend un circuit d'alimentation en gaz situé en amont du moteur ainsi qu'un circuit d'échappement situé en aval dudit moteur pour évacuer les gaz brûlés.Generally, motor vehicles operating with a heat engine implement a gas circuit for supplying said engine during certain phases of use of the vehicle. Such a circuit has an air intake captured outside the vehicle, and comprises a gas supply circuit located upstream of the engine and an exhaust circuit located downstream of said engine to evacuate the gases. burned.

Il arrive assez fréquemment qu'un tel circuit soit doté d'au moins une boucle EGR (Exhaust Gas Recirculation), permettant de ponctionner au niveau du circuit d'échappement une partie des gaz brûlés pour les réinjecter dans le circuit d'alimentation, afin que l'alimentation du moteur en gaz soit assurée par un mélange d'air frais incident et de gaz brûlés. Généralement, le débit des gaz dans ces boucles EGR est régulé au moyen d'une vanne couplée à un refroidisseur, pour refroidir lesdits gaz durant certaines phases temporaires et spécifiques d'utilisation du moteur. On peut citer notamment la demande de brevet WO2007/079983 qui décrit une vanne de régulation d'un flux gazeux dans une boucle EGR. Ces vannes comprennent donc une entrée de gaz et deux sorties de gaz. Une première sortie est prévue pour acheminer directement les gaz brûlés vers le circuit d'alimentation situé en amont du moteur, et une deuxième sortie est conçue pour orienter préalablement lesdits gaz brûlés vers le refroidisseur afin de les refroidir préalablement avant qu'ils n'arrivent dans ledit circuit d'alimentation. Ces vannes sont équipées d'un volet rotatif, apte à pivoter entre une première position pour laquelle il obture la deuxième sortie et provoque le passage des gaz vers la première sortie, et une deuxième position pour laquelle il ferme la première sortie et entraîne le passage des gaz vers la deuxième sortie. La rotation du volet est commandée et s'effectue automatiquement à partir d'une unité centrale de calcul qui envoie un signal électrique adapté, au moment opportun. Afin d'obtenir une bonne maîtrise des différents flux gazeux mis en oeuvre par la vanne, il est important que le volet assure une bonne étanchéité lorsqu'il occupe l'une ou l'autre de ses deux positions d'obturation au sein de ladite vanne.It happens quite often that such a circuit is provided with at least one EGR loop (Exhaust Gas Recirculation), allowing exhaust circuit to be punctured by a portion of the flue gases for reinjecting them into the supply circuit, in order to that the engine gas supply is provided by a mixture of incident fresh air and burnt gas. Generally, the flow rate of the gases in these EGR loops is regulated by means of a valve coupled to a cooler, for cooling said gases during certain temporary and specific phases of use of the engine. We can cite in particular the patent application WO2007 / 079983 which describes a valve regulating a gas flow in an EGR loop. These valves therefore comprise a gas inlet and two gas outlets. A first outlet is provided for directly conveying the burnt gases to the supply circuit located upstream of the engine, and a second outlet is designed to previously direct said burnt gases to the cooler to cool beforehand before they arrive. in said supply circuit. These valves are equipped with a rotary shutter, pivotable between a first position for which it closes the second outlet and causes the passage of gas to the first outlet, and a second position for which it closes the first outlet and causes the passage gases to the second exit. The rotation of the shutter is controlled and is performed automatically from a central computing unit that sends a suitable electrical signal at the appropriate time. In order to obtain a good control of the different gaseous flows implemented by the valve, it is important that the flap ensures a good seal when it occupies one or the other of its two shutter positions within said valve.

Les vannes actuelles possèdent un volet dimensionné de façon un peu limitée afin qu'il puisse pivoter aisément dans la vanne, si bien que le volet laisse subsister des interstices de passage des gaz au niveau du conduit qu'il est sensé obturer, lesdits interstices étant plutôt localisés autour dudit volet. Il en résulte un fonctionnement approximatif et peu contrôlé des boucles EGR, risquant d'affecter le fonctionnement du circuit d'alimentation en gaz du moteur.The current valves have a flap dimensioned in a somewhat limited way so that it can pivot easily in the valve, so that the flap leaves gaps of passage of the gas at the level of the duct that is supposed to close, said interstices being rather localized around this component. This results in an approximate and poorly controlled operation of the EGR loops, which may affect the operation of the engine gas supply circuit.

Les vannes selon l'invention mettent en oeuvre un volet associé à une structure interne particulière de ladite vanne, ledit volet et ladite structure interagissant pour assurer une parfaite étanchéité du volet dans au moins l'une de ses positions d'obturation. Les phases d'ouverture et de fermeture de la vanne sont donc propres, sans laisser échapper la moindre fraction de gaz résiduel, rendant ainsi le circuit d'alimentation en gaz parfaitement fiable et pleinement efficace.The valves according to the invention implement a flap associated with a particular internal structure of said valve, said flap and said interacting structure to ensure a perfect seal of the flap in at least one of its closed positions. The opening and closing phases of the valve are clean, without leaving any fraction of residual gas, thus making the gas supply circuit perfectly reliable and fully effective.

L'invention a pour objet une vanne de régulation d'un flux gazeux dans une boucle EGR d'un circuit d'alimentation en gaz d'un moteur de véhicule, comprenant une entrée de gaz, une première sortie de gaz pour acheminer directement les gaz dans le circuit d'alimentation, et une deuxième sortie de gaz permettant de faire passer lesdits gaz dans un conduit traversant un refroidisseur avant de les injecter dans ledit circuit d'alimentation, ladite vanne possédant un volet rotatif apte à pivoter entre une première position pour laquelle il obture la deuxième sortie tout en ouvrant la première sortie, et une deuxième position pour laquelle il obture la première sortie tout en ouvrant la deuxième sortie. Dans la vanne selon l'invention, le volet comprend un corps principal plan apte à ouvrir ou à fermer le conduit, la structure interne de la vanne présentant un rebord plan, de sorte que le corps principal du volet vienne en appui plan contre ledit rebord lorsque ledit volet se retrouve dans sa deuxième position. Le volet de la vanne selon l'invention permet d'ouvrir une sortie et de fermer simultanément l'autre sortie, et inversement. La vanne selon l'invention a ainsi subi un double aménagement, au niveau à la fois du conduit et du volet, de manière à ce que le corps principal du volet vienne en contact plan avec le conduit, pour assurer une ouverture étanche de la deuxième sortie, sans perte de gaz vers la première sortie. De cette manière, la vanne peut acheminer de façon propre et donc sans perte, des gaz d'échappement vers le refroidisseur de la boucle EGR, avant de les envoyer dans le circuit d'alimentation principal en gaz du moteur. En effet, il existe des phases d'utilisation du moteur nécessitant un refroidissement préalable des gaz EGR avant de les réinjecter dans le circuit d'alimentation du moteur, et d'autres phases pour lesquelles ce refroidissement préalable n'est pas utile. Il est donc particulièrement important de passer d'une configuration à l'autre, avec une bonne maîtrise, sans occasionner de fuites résiduelles de gaz en raison d'une interaction approximative entre le volet et la structure interne de la vanne. Selon l'invention, le conduit forme une boucle avec une entrée prolongeant la deuxième sortie de la vanne et une sortie débouchant au niveau de la première sortie de ladite vanne, et le volet peut présenter un corps secondaire plan en continuité avec le corps principal, ledit volet étant positionné dans la vanne de sorte qu'il puisse pivoter autour d'un axe de rotation placé entre le corps principal et le corps secondaire. Il est supposé que le corps principal et le corps secondaire sont reliés rigidement l'un à l'autre. Lorsque le corps principal du volet obture le conduit permettant le passage des gaz d'échappement vers le refroidisseur, le corps secondaire obture également partiellement la sortie dudit conduit, et lorsque ledit corps principal ouvre ledit conduit, le volet secondaire libère la sortie de ce conduit. Le corps principal et le corps secondaire du volet peuvent être représentés par deux pièces séparées, ou bien peuvent constituer une seule et même pièce. Selon l'invention, le corps principal s'étend selon une direction perpendiculaire à l'axe de rotation, tandis que le corps secondaire s'étend selon une direction parallèle audit axe de rotation. Selon l'invention, les deux bords latéraux du corps principal présentent chacun un relief, la structure interne de la vanne comportant des reliefs complémentaires, de sorte que les reliefs du corps principal viennent en appui contre les reliefs complémentaires de ladite structure pour assurer une obturation étanche du conduit. Il est à préciser que les bords latéraux du corps principal du volet sont situés de façon symétrique de part et d'autre de l'axe longitudinal dudit corps principal. Cette complémentarité des reliefs permet au volet d'assurer au niveau de son corps principal une fermeture du conduit avec une étanchéité maximisée. Une vanne selon l'invention possède ainsi un volet permettant d'assurer une fermeture étanche du conduit, ainsi qu'une ouverture étanche dudit conduit, sans perte de gaz vers la première sortie. Un relief peut tout aussi bien être matérialisé par un creux ou par un élément en saillie.The invention relates to a valve for regulating a gas flow in an EGR loop of a gas supply circuit of a vehicle engine, comprising a gas inlet, a first gas outlet for directly conveying the gas in the supply circuit, and a second gas outlet for passing said gases in a conduit passing through a cooler before injecting them into said supply circuit, said valve having a rotatable flap adapted to pivot between a first position for which it closes the second output while opening the first output, and a second position for which it closes the first output while opening the second output. In the valve according to the invention, the flap comprises a planar main body adapted to open or close the duct, the internal structure of the valve having a plane flange, so that the main body of the flap comes in plane bearing against said flange. when said component is in its second position. The flap of the valve according to the invention makes it possible to open an outlet and simultaneously close the other outlet, and vice versa. The valve according to the invention has thus undergone a dual arrangement, at the level of both the duct and the shutter, so that the main body of the shutter comes into plane contact with the duct, to ensure sealed opening of the second outlet, without loss of gas to the first outlet. In this way, the valve can flow cleanly and thus without loss, exhaust gases to the cooler of the EGR loop, before sending them into the main gas supply circuit of the engine. Indeed, there are phases of use of the engine requiring prior cooling of the EGR gas before reinjecting them into the engine supply circuit, and other phases for which this pre-cooling is not useful. It is therefore particularly important to switch from one configuration to another, with good control, without causing residual gas leakage due to an approximate interaction between the flap and the internal structure of the valve. According to the invention, the conduit forms a loop with an inlet extending the second outlet of the valve and an outlet opening at the first outlet of said valve, and the flap may have a secondary secondary body in continuity with the main body, said flap being positioned in the valve so that it can pivot about an axis of rotation placed between the main body and the secondary body. It is assumed that the main body and the secondary body are rigidly connected to each other. When the main body of the shutter closes the duct allowing the passage of the exhaust gas to the cooler, the secondary body also partly closes the outlet of said duct, and when said main body opens said duct, the secondary flap releases the outlet of this duct . The main body and the secondary body of the shutter can be represented by two separate parts, or can be a single piece. According to the invention, the main body extends in a direction perpendicular to the axis of rotation, while the secondary body extends in a direction parallel to said axis of rotation. According to the invention, the two lateral edges of the main body each have a relief, the internal structure of the valve having complementary reliefs, so that the reliefs of the main body come into bearing against the complementary reliefs of said structure to ensure sealing of the conduit. It should be noted that the lateral edges of the main body of the flap are located symmetrically on either side of the longitudinal axis of said main body. This complementarity of the reliefs allows the shutter to ensure at its main body closure of the conduit with a maximized seal. A valve according to the invention thus has a flap for sealing the duct, and a sealed opening of said duct, without loss of gas to the first outlet. A relief can just as easily be materialized by a hollow or a projecting element.

Préférentiellement, les reliefs complémentaires sont positionnés en périphérie d'un orifice de la structure interne de la vanne.Preferably, the complementary reliefs are positioned at the periphery of an orifice of the internal structure of the valve.

Le ou les reliefs complémentaires peuvent être obtenus par usinage de la structure interne de la vanne. Selon l'invention, les reliefs du corps principal sont représentés par deux protubérances allongées s'étendant latéralement le long dudit corps, chaque protubérance présentant une section arrondie, les reliefs complémentaires étant matérialisés par des parties creusées dans la structure interne de la vanne. L'essentiel pour cette configuration est que les protubérances viennent se placer dans lesdites parties creusées, afin d'assurer un contact étroit entre la structure interne et le volet. Le fait que les protubérances aient une forme arrondie privilégie les conditions d'étanchéité en évitant d'introduire des angles qui pourraient constituer des sources de passage de gaz.The complementary relief or reliefs can be obtained by machining the internal structure of the valve. According to the invention, the reliefs of the main body are represented by two elongated protuberances extending laterally along said body, each protuberance having a rounded section, the complementary reliefs being materialized by parts hollowed in the internal structure of the valve. The essential for this configuration is that the protuberances are placed in said excavated parts, to ensure a close contact between the internal structure and the flap. The fact that the protuberances have a rounded shape privileges the sealing conditions by avoiding introducing angles that could be sources of gas passage.

De façon préférentielle, l'extrémité libre de chaque protubérance et qui est la plus éloignée du corps secondaire est arrondie, pour s'adapter au mieux aux parties creusées de la structure interne de la vanne. Ces parties arrondies supplémentaires accentuent encore les conditions d'étanchéité entre le volet et l'entrée du conduit.Preferably, the free end of each protuberance and which is furthest from the secondary body is rounded, to best fit the excavated parts of the internal structure of the valve. These additional rounded portions further accentuate the sealing conditions between the flap and the entrance of the duct.

De façon avantageuse, le corps principal et les deux protubérances sont faits d'une seule pièce, lesdites protubérances correspondant à deux zones embouties du corps principal. Cette configuration de volet est la plus simple et la plus rapide à fabriquer. L'emboutissage est une opération permettant également d'obtenir une pièce ayant une géométrie précise.Advantageously, the main body and the two protuberances are made in one piece, said protuberances corresponding to two stamped areas of the main body. This shutter configuration is the simplest and fastest to manufacture. Stamping is an operation that also makes it possible to obtain a part having a precise geometry.

Préférentiellement, l'extrémité libre du corps secondaire et qui est la plus éloignée du corps principal est délimitée par un rebord rectiligne s'étendant parallèlement à l'axe de rotation, ladite extrémité étant biseautée. Autrement dit, cette extrémité s'affine progressivement pour se terminer par une arête. Lorsque le volet est dans une position pour laquelle le corps principal ouvre le conduit et le corps secondaire obture la première sortie de la vanne, l'extrémité du volet secondaire est amenée à venir au contact d'une barrette implantée dans la structure interne de la vanne. Le fait de biseauter l'extrémité dudit corps secondaire permet au volet d'accroître son amplitude de rotation, en évitant à ladite extrémité de venir trop tôt au contact de ladite barrette. Ce biseau permet donc d'accroître l'amplitude de rotation du volet, afin que celui-ci occupe une position satisfaisante pour laquelle il va assurer l'ouverture du conduit sans perte de gaz et assurer une fermeture étanche de la première sortie. Le biseau peut également permettre de réduire le jeu existant entre l'extrémité du volet et la barrette.Preferably, the free end of the secondary body and which is farthest from the main body is delimited by a rectilinear flange extending parallel to the axis of rotation, said end being beveled. In other words, this end is gradually refined to end with an edge. When the flap is in a position for which the main body opens the duct and the secondary body closes the first outlet of the valve, the end of the secondary flap is brought into contact with a bar implanted in the internal structure of the valve. Bevelling the end of said secondary body allows the flap to increase its amplitude of rotation, avoiding said end coming too early in contact with said bar. This bevel therefore makes it possible to increase the amplitude of rotation of the flap, so that it occupies a satisfactory position for which it will ensure the opening of the duct without loss of gas and ensure a tight closure of the first outlet. The bevel can also reduce the clearance between the end of the flap and the bar.

Avantageusement, le volet est réalisé en tôle. Ce matériau octroie une certaine souplesse au volet, qui peut ainsi se déformer légèrement au contact du conduit, afin d'assurer pleinement sa fonction d'étanchéité lors de l'ouverture ou de la fermeture dudit conduit.Advantageously, the shutter is made of sheet metal. This material provides a certain flexibility to the flap, which can thus deform slightly in contact with the duct, to fully ensure its sealing function when opening or closing said duct.

Les vannes selon l'invention présentent l'avantage de fonctionner proprement, aussi bien lors de la phase de fermeture du conduit que lors de sa phase d'ouverture, en assurant une étanchéité accrue au moyen d'aménagements judicieux, simples et rapides à mettre en oeuvre, et donc peu couteux. En effet, ces aménagements consistent à apporter de petites retouches d'usinage au niveau de l'entrée du conduit et à modifier légèrement la géométrie du volet, afin que l'interaction du volet avec le conduit soit optimisée.The valves according to the invention have the advantage of operating properly, both during the closing phase of the duct and during its opening phase, by providing increased sealing by means of judicious adjustments, simple and fast to put implemented, and therefore inexpensive. Indeed, these arrangements consist of making small machining retouches at the entrance of the duct and to slightly modify the geometry of the shutter, so that the interaction of the shutter with the duct is optimized.

On donne ci-après une description détaillée d'un mode de réalisation préféré d'une vanne selon l'invention, en se référant aux figures 1 à 7.

  • La figure 1 est une vue en coupe d'un ensemble constitué d'une vanne selon l'invention et d'un refroidisseur, le volet étant positionné pour faire passer les gaz vers le refroidisseur,
  • La figure 2 est une vue en coupe d'un ensemble constitué d'une vanne selon l'invention et d'un refroidisseur, le volet étant positionné pour fermer la voie d'accès au refroidisseur,
  • La figure 3 est une vue en perspective d'un volet appartenant à une vanne selon l'invention,
  • La figure 4 est une vue en perspective de la structure interne d'une vanne selon l'invention, montrant un appui plan servant de butée au volet 7 dans sa deuxième position,
  • La figure 5a est une vue en perspective partielle de la structure interne d'une vanne selon l'invention, le volet étant dans une position d'ouverture du conduit vers le refroidisseur,
  • La figure 5b est une vue simplifiée de la structure interne et du volet de la vanne de la figure 5a, prise sous un autre angle, et montrant les points d'appui dudit volet,
  • La figure 6 est une vue simplifiée de la structure interne et du volet de la vanne de la figure 5b, le volet étant dans une position d'obturation du conduit vers le refroidisseur.
  • La figure 7 est une vue schématique montrant l'interaction du volet d'une vanne selon l'invention, avec une barrette séparant la vanne et le refroidisseur.
The following is a detailed description of a preferred embodiment of a valve according to the invention, with reference to the Figures 1 to 7 .
  • The figure 1 is a sectional view of an assembly consisting of a valve according to the invention and a cooler, the flap being positioned to pass the gas to the cooler,
  • The figure 2 is a sectional view of an assembly consisting of a valve according to the invention and a cooler, the flap being positioned to close the access path to the cooler,
  • The figure 3 is a perspective view of a shutter belonging to a valve according to the invention,
  • The figure 4 is a perspective view of the internal structure of a valve according to the invention, showing a plane support acting as a stop on the flap 7 in its second position,
  • The figure 5a is a partial perspective view of the internal structure of a valve according to the invention, the flap being in an open position of the duct towards the cooler,
  • The figure 5b is a simplified view of the internal structure and flap of the valve of the figure 5a , taken from another angle, and showing the points of support of the flap,
  • The figure 6 is a simplified view of the internal structure and flap of the valve of the figure 5b , the flap being in a closed position of the duct to the cooler.
  • The figure 7 is a schematic view showing the interaction of the flap of a valve according to the invention, with a bar separating the valve and the cooler.

En se référant aux figures 1 et 2, une vanne 1 selon l'invention est une vanne d'une boucle EGR implantée dans un circuit d'alimentation en gaz d'un moteur thermique de véhicule automobile. Une boucle EGR permet de dévier une partie des gaz d'échappement issus du moteur, pour les réacheminer dans la partie du circuit d'alimentation située en amont du moteur, de manière à ce que l'alimentation dudit moteur s'effectue avec un mélange d'air et de gaz brûlés. Une vanne EGR 1 est généralement couplée à un refroidisseur 2 de gaz, prévu pour refroidir préalablement les gaz d'échappement de ladite boucle avant de les acheminer dans le circuit d'alimentation en gaz du moteur, ce refroidissement n'étant recherché que sur certaines plages de fonctionnement du moteur. Autrement dit, il n'est pas nécessaire de refroidir en permanence les gaz de la boucle EGR. La vanne doit alors être conçue, soit pour acheminer directement les gaz EGR vers le circuit d'alimentation en gaz du moteur, soit pour les faire passer préalablement par le refroidisseur 2 avant de les convoyer vers ledit circuit d'alimentation. Une vanne 1 selon l'invention comprend une entrée 3 d'air, une première sortie 4 de gaz pour les acheminer directement dans le circuit d'alimentation, et une deuxième sortie 5 permettant de faire passer lesdits gaz dans un conduit 6 traversant le refroidisseur 2 avant de les injecter dans ledit circuit d'alimentation. Le conduit 6 définit une boucle de circulation de gaz traversant le refroidisseur 2, ledit conduit 6 possédant une entrée 19 prolongeant la deuxième sortie 5 de la vanne 1, et une sortie débouchant au niveau de la première sortie 4 de ladite vanne 1. La vanne 1 est dotée d'un volet 7 d'obturation monté pivotant, prévu pour adopter une première position pour laquelle il obture la deuxième sortie 5 de la vanne 1, tout en ouvrant la première sortie 4, et une deuxième position pour laquelle il obture la première sortie 4 tout en ouvrant la deuxième sortie 5 de ladite vanne. Le mouvement en rotation du volet 7 est commandé automatiquement par une unité centrale de calcul.Referring to Figures 1 and 2 , a valve 1 according to the invention is a valve of an EGR loop implanted in a gas supply circuit of a motor vehicle engine. An EGR loop deflects part of the exhaust gases from the engine, to reroute them in the part of the feed circuit located upstream of the engine, so that the supply of said engine is carried out with a mixture of air and flue gas. An EGR valve 1 is generally coupled to a gas cooler 2, designed to pre-cool the exhaust gases of said loop before routing them into the engine gas supply circuit, this cooling being sought only on certain operating ranges of the engine. In other words, it is not necessary to continuously cool the gases of the EGR loop. The valve must then be designed, either to directly route the EGR gas to the engine gas supply system, or to pass beforehand through the cooler 2 before conveying to said supply circuit. A valve 1 according to the invention comprises an air inlet 3, a first gas outlet 4 for conveying them directly into the supply circuit, and a second outlet 5 for passing said gases through a duct 6 passing through the cooler. 2 before injecting them into said supply circuit. The duct 6 defines a gas circulation loop passing through the cooler 2, said duct 6 having an inlet 19 extending the second outlet 5 of the valve 1, and an outlet opening at the first outlet 4 of said valve 1. The valve 1 is provided with a shutter 7 pivotally mounted, provided to adopt a first position for which it closes the second outlet 5 of the valve 1, while opening the first outlet 4, and a second position for which it closes the first output 4 while opening the second output 5 of said valve. The rotational movement of the shutter 7 is automatically controlled by a central computing unit.

La figure 1 montre le volet 7 dans sa deuxième position, pour laquelle il permet le passage des gaz dans le conduit 6 traversant le refroidisseur 2 dans le sens indiqué par les flèches 8.The figure 1 shows the flap 7 in its second position, for which it allows the passage of gases in the duct 6 passing through the cooler 2 in the direction indicated by the arrows 8.

La figure 2 montre le volet 7 dans sa première position, pour laquelle il obture le conduit 6 pour acheminer directement les gaz vers le circuit d'alimentation du moteur, dans le sens indiqué par les flèches 9. L'amplitude de rotation maximale du volet 7 entre la première et la deuxième position est inférieure ou égale à 90°. L'axe de rotation du volet 7 est représenté par deux ergots cylindriques 10 alignés se faisant face et implantés dans la structure interne de la vanne 1.The figure 2 shows the flap 7 in its first position, for which it closes the duct 6 to direct the gas directly to the engine supply circuit, in the direction indicated by the arrows 9. The maximum rotation amplitude of the flap 7 between the first and second position is less than or equal to 90 °. The axis of rotation of the flap 7 is represented by two aligned cylindrical pins 10 facing each other and implanted in the internal structure of the valve 1.

En se référant à la figure 3, le volet 7 d'une vanne selon 1 l'invention comprend un corps principal 11 plan et un corps secondaire 12 plan, les deux corps 11,12 étant en continuité l'un de l'autre et reliés entre eux rigidement. Le corps principal 11 présente une paroi plane 13 et rectangulaire, de faible épaisseur, ainsi que deux protubérances 14 parallèles, s'étendant le long d'un axe longitudinal de la paroi 13, lesdites protubérances 14 matérialisant les deux bords latéraux du corps principal 11 par rapport à un axe longitudinal central de ladite paroi. Les deux protubérances 14 sont identiques et sont chacune assimilables à un bord ondulé ayant une section en forme de S. La paroi rectangulaire 13 ainsi que les deux protubérances 14 latérales constituent la même pièce, lesdites protubérances étant réalisées par emboutissage. Le corps secondaire 12 présente également une paroi 15 plane et rectangulaire, ayant la même épaisseur que celle de la paroi 13 du corps cylindrique principal 11, et est disposé perpendiculairement au corps principal 11. Autrement dit, un grand côté de la paroi 13 du corps principal 11 est perpendiculaire à un grand côté de la paroi 15 du corps secondaire 12. Le corps secondaire 12 est centré par rapport au corps principal 11, de sorte que l'axe longitudinal central du corps principal 11 coupe les deux grands cotés du corps secondaire 12 en leur milieu. Le corps secondaire 12 est prolongé par une avancée rectangulaire 16, dont la plus grande dimension est égale à la largeur du corps principal 11, le corps secondaire 12 étant relié au corps principal 11 par l'intermédiaire de cette avancée 16. L'extrémité libre 17 du corps secondaire 12, et qui est délimitée par le grand coté opposé à l'avancée 16, se termine en biseau. Autrement dit, cette extrémité 17 diminue progressivement d'épaisseur pour se terminer par une arête 18. L'extrémité libre 21 de chaque protubérance 14, qui est l'extrémité la plus éloignée du corps secondaire 12, est de forme arrondie. Le volet 7 est placé dans la vanne 1, de sorte que les deux ergots cylindriques 10 matérialisant son axe de rotation se retrouvent entre le corps principal 11 et le corps secondaire 12 du volet 7. Lorsque le volet 7 se retrouve dans sa deuxième position, correspondant à une occultation du conduit 6, le corps secondaire permet d'obturer partiellement la sortie dudit conduit 6 débouchant au niveau de la première sortie 4 de la vanne 1.Referring to the figure 3 , the flap 7 of a valve 1 according to the invention comprises a main body 11 plane and a secondary body 12 plane, the two bodies 11,12 being in continuity with one another and interconnected rigidly. The main body 11 has a thin, rectangular, rectangular wall 13 and two parallel protuberances 14 extending along a longitudinal axis of the wall 13, said protuberances 14 embodying the two lateral edges of the main body 11 relative to a central longitudinal axis of said wall. The two protuberances 14 are identical and are each comparable to a corrugated edge having an S-shaped section. The rectangular wall 13 and the two lateral protuberances 14 constitute the same part, said protuberances being made by stamping. The secondary body 12 also has a flat, rectangular wall 15, having the same thickness as that of the wall 13 of the main cylindrical body 11, and is arranged perpendicularly to the main body 11. In other words, a large side of the wall 13 of the body main 11 is perpendicular to a large side of the wall 15 of the secondary body 12. The secondary body 12 is centered relative to the main body 11, so that the central longitudinal axis of the main body 11 intersects the two large sides of the secondary body 12 in their middle. The secondary body 12 is extended by a rectangular projection 16, the largest dimension of which is equal to the width of the main body 11, the secondary body 12 being connected to the main body 11 via this advance 16. The free end 17 of the secondary body 12, which is delimited by the large side opposite the advance 16, ends in bevel. In other words, this end 17 gradually decreases in thickness and ends with a ridge 18. The end 21 free of each protrusion 14, which is the end farthest from the secondary body 12, is rounded. The flap 7 is placed in the valve 1, so that the two cylindrical pins 10 embodying its axis of rotation are found between the main body 11 and the secondary body 12 of the flap 7. When the flap 7 is in its second position, corresponding to an occultation of the duct 6, the secondary body partially closes the outlet of said duct 6 opening at the first outlet 4 of the valve 1.

En se référant à la figure 4, la structure interne 19 de la vanne 1 permettant de faire passer les gaz de la vanne 1 vers le refroidisseur 2 a été usinée de manière à présenter un rebord plan 20 permettant au corps principal 11 du volet 7 de venir en appui plan contre ledit rebord 20, lorsque le volet 7 se retrouve dans sa deuxième position pour laquelle il ouvre entièrement la deuxième sortie 5 de la vanne 1 et obture la première sortie 4.Referring to the figure 4 , the internal structure 19 of the valve 1 for passing the gas from the valve 1 to the cooler 2 has been machined so as to have a plane flange 20 allowing the main body 11 of the flap 7 to abut plane against said flange 20, when the flap 7 is in its second position for which it fully opens the second outlet 5 of the valve 1 and closes the first outlet 4.

Cet appui plan du corps principal 11 du volet 7 sur le rebord plan 20 de la structure interne 19 de la vanne 1, est visible sur les figures 5a et 5b. Le contact avec ledit rebord plan 20 est assuré avec la paroi 13 du corps principal 11 du volet 7. De cette manière, lorsque le volet 7 est figé dans sa deuxième position, l'interface de liaison entre ladite paroi 13 et ledit rebord 20 est plane et étalée, permettant d'assurer un contact étanche entre ledit volet 7 et la structure interne 19. En se référant à la figure 5b, on observe un chevauchement entre la paroi 13 du corps principal 11 du volet 7 et le rebord plan 20 de la structure interne 19 de la vanne 1, ledit chevauchement interdisant tout passage de gaz entre lesdits éléments 13,20 au contact l'un de l'autre.This plane support of the main body 11 of the flap 7 on the plane flange 20 of the internal structure 19 of the valve 1, is visible on the figures 5a and 5b . The contact with said flat flange 20 is provided with the wall 13 of the main body 11 of the flap 7. In this way, when the flap 7 is fixed in its second position, the connection interface between said wall 13 and said flange 20 is planar and spreading, to ensure a sealed contact between said flap 7 and the internal structure 19. Referring to the figure 5b , there is an overlap between the wall 13 of the main body 11 of the flap 7 and the plane flange 20 of the internal structure 19 of the valve 1, said overlap preventing any passage of gas between said elements 13,20 in contact with one of the other.

En se référant à la figure 5b, la périphérie de la structure interne de la vanne 1, contre laquelle est destinée à venir se plaquer le corps principal 11 du volet 7 lorsque ledit volet 7 se retrouve dans sa première position 4 correspondant à une obturation du conduit 6, a également été usinée pour laisser apparaitre des éléments de surface 22 travaillés, légèrement creusés, ayant sensiblement une géométrie complémentaire de celle des protubérances 14 du volet 7.Referring to the figure 5b , the periphery of the internal structure of the valve 1, against which is intended to come to be pressed the main body 11 of the flap 7 when said flap 7 is found in its first position 4 corresponding to a closure of the duct 6, has also been machined to reveal surface elements 22 worked, slightly hollowed, substantially having a geometry complementary to that of the protuberances 14 of the flap 7.

En effet, comme le montre la figure 6, lorsque le volet 7 se retrouve dans sa première position, pour laquelle son corps principal 11 occulte le conduit 6 vers le refroidisseur 2, ledit corps principal 11 vient se plaquer contre les éléments de surface 22 creusés de la structure interne de la vanne 1. Plus exactement, ce sont les protubérances 14 de ce corps principal 11, dont les formes sont complémentaires de celles des éléments 22 de surface, qui vont venir se plaquer dans lesdits éléments de surface 22, sans laisser subsister d'interstices de passage pour les gaz. Ce contact est d'autant plus étroit que le volet 7 est apte à se déformer élastiquement pour permettre aux protubérances 14 d'établir un contact amélioré avec lesdits éléments de surface 22.Indeed, as shown in figure 6 when the flap 7 is in its first position, for which its main body 11 conceals the duct 6 to the cooler 2, said main body 11 is pressed against the surface elements 22 hollowed out of the internal structure of the valve 1. More exactly, it is the protuberances 14 of this main body 11, the shapes of which are complementary to those of the surface elements 22, which will come to be pressed into said surface elements 22, without leaving gaps of passage for the gases. . This contact is all the narrower that the flap 7 is able to deform elastically to allow the protuberances 14 to establish an improved contact with said surface elements 22.

En se référant aux figures 1, 2 et 7, la vanne 1 et le refroidisseur 2 sont séparés par une paroi comprenant une barrette 23 en saillie. Lorsque le volet 7 se déplace en rotation de sa première position vers sa deuxième position, l'extrémité 17 en biseau du corps secondaire 12 du volet 7 est amenée, en fin de course, à venir au contact de ladite barrette 23. Le fait que cette extrémité se termine par un biseau délimité par une arête fine 18 permet de prolonger de quelques degrés l'amplitude de rotation dudit volet 7, en évitant que ladite extrémité 17 ne vienne trop tôt se bloquer contre ladite barrette 23. De cette manière, le volet 7 peut effectuer une rotation complète lui permettant d'occuper sa deuxième position en assurant une étanchéité totale, sans fuite de gaz vers la première sortie 4 de la vanne 1.Referring to Figures 1, 2 and 7 , the valve 1 and the cooler 2 are separated by a wall comprising a bar 23 projecting. When the flap 7 moves in rotation from its first position to its second position, the beveled end 17 of the secondary body 12 of the flap 7 is brought, at the end of the stroke, to come into contact with said bar 23. The fact that this end ends with a bevel defined by a thin edge 18 allows to extend by a few degrees the amplitude of rotation of said flap 7, avoiding that said end 17 comes too early to lock against said bar 23. In this way, the flap 7 can perform a complete rotation allowing it to occupy its second position by providing a complete seal, without gas leakage to the first outlet 4 of the valve 1.

En variante, dans la deuxième position, un jeu peut subsister entre l'extrémité 17 en biseau du corps secondaire 12 du volet et la barrette 23.Alternatively, in the second position, a clearance can remain between the beveled end 17 of the secondary body 12 of the flap and the bar 23.

Claims (6)

  1. Device comprising a regulating valve (1) and a cooler for a gas flow in an EGR loop of a gas supply circuit of a vehicle engine, comprising a gas inlet (3), a first gas outlet (4) for directly feeding the gases into the supply circuit, and a second gas outlet (5) enabling said gases to flow into a duct (6) passing through a cooler (2) before injecting said gases into said supply circuit, said valve (1) having a rotatable flap (7) capable of pivoting between a first position in which it blocks the second outlet (5) whilst at the same time opening the first outlet (4) and a second position in which it blocks the first outlet (4) whilst at the same time opening the second outlet (5), the flap (7) comprising a planar principal body (11) capable of opening or closing the duct (6), the duct (6) forming a loop with an inlet extending the second outlet (5) of the valve (1) and an outlet opening into the region of the first outlet (4) of said valve (1), the flap (7) having a planar secondary body (12) contiguous with the principal body (11), said flap (7) being positioned in the valve (1) such that it may pivot about an axis of rotation (10) placed between the principal body (11) and the secondary body (12), the principal body (11) extending in a direction perpendicular to the axis of rotation (10) whilst the secondary body (12) extends along a direction parallel to said axis of rotation (10),
    characterized in that said valve (6) has a planar edge (20) such that the principal body (11) of the flap (7) comes to bear in a planar manner against said edge (20) when said flap (7) is located in the second position thereof, the two lateral edges (14) of the principal body (11) each having a relief portion and the internal structure of the valve (1) comprising complementary relief portions (22) such that the relief portions (14) of the principal body (11) come to bear against the complementary relief portions (22) of said structure to ensure a sealed blocking of said duct (6), the relief portions of the principal body being represented by two elongated projections (14) extending laterally along said body (11), each projection (14) having a rounded section, the complementary relief portions being formed by hollow parts (22) in the internal structure of the valve (1).
  2. Valve according to Claim 1, characterized in that the complementary relief portions (22) are positioned on the periphery of an orifice of the internal structure of the valve (1).
  3. Device according to Claim 1 or 2, characterized in that the free end (21) of each projection (14) and which is the most remote from the secondary body (12) is rounded so as to be best adapted to the hollowed parts (22) of the internal structure of the valve (1).
  4. Device according to any one of Claims 1 to 3, characterized in that the principal body (11) and the two projections (14) are made in one piece, said projections (14) corresponding to two stamped zones of the principal body (11).
  5. Device according to any one of Claims 1 to 4, characterized in that the free end (17) of the secondary body (12) and which is the most remote from the principal body (11) is defined by a rectilinear edge extending parallel to the axis of rotation (10), said end (17) being chamfered.
  6. Device according to any one of Claims 1 to 5, characterized in that the flap (7) is produced from sheet metal.
EP12816689.9A 2011-12-01 2012-11-30 Valve for a gas flow circuit in a vehicle Not-in-force EP2786007B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1161008A FR2983532B1 (en) 2011-12-01 2011-12-01 VALVE FOR A GAS CIRCUIT CIRCUIT IN A VEHICLE
PCT/FR2012/052765 WO2013079880A1 (en) 2011-12-01 2012-11-30 Valve for a gas flow circuit in a vehicle

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EP2786007A1 EP2786007A1 (en) 2014-10-08
EP2786007B1 true EP2786007B1 (en) 2017-10-11

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EP (1) EP2786007B1 (en)
JP (1) JP6125522B2 (en)
KR (1) KR20140102724A (en)
CN (1) CN104081034B (en)
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Publication number Publication date
EP2786007A1 (en) 2014-10-08
JP2015500936A (en) 2015-01-08
US20140318637A1 (en) 2014-10-30
CN104081034A (en) 2014-10-01
KR20140102724A (en) 2014-08-22
JP6125522B2 (en) 2017-05-10
US9567927B2 (en) 2017-02-14
FR2983532B1 (en) 2015-02-13
FR2983532A1 (en) 2013-06-07
WO2013079880A1 (en) 2013-06-06
CN104081034B (en) 2017-08-04

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