EP2935863A1 - Nozzle, high-pressure valve able to accept the nozzle and common rail able to accept the nozzle - Google Patents

Nozzle, high-pressure valve able to accept the nozzle and common rail able to accept the nozzle

Info

Publication number
EP2935863A1
EP2935863A1 EP13817903.1A EP13817903A EP2935863A1 EP 2935863 A1 EP2935863 A1 EP 2935863A1 EP 13817903 A EP13817903 A EP 13817903A EP 2935863 A1 EP2935863 A1 EP 2935863A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
seat
valve
shaft
shutter member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13817903.1A
Other languages
German (de)
French (fr)
Inventor
Michel Marechal
Frédéric Sauvage
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Priority to EP18177234.4A priority Critical patent/EP3404250A1/en
Publication of EP2935863A1 publication Critical patent/EP2935863A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail

Definitions

  • the invention relates to a high pressure valve for diesel injection circuit and more particularly the arrangement of these components and the manufacture thereof.
  • Direct fuel injection systems in internal combustion engines include a pilot operated valve that can be in direct contact with a common rail delivering pressurized fuel to injectors.
  • the valve is
  • Valves including a tubular body in which an axially movable central shaft closes or releases the fuel outlet passage.
  • the central shaft has a flat end in contact with the core of
  • the movable shaft is axially guided in a central bore of the body.
  • the central bore and the movable shaft must each have an excellent surface state and a very low cylindricity defect.
  • the assembly must also have a low coaxiality defect.
  • the movable shaft must be made of a high quality steel, for example a 100Cr6 steel quenched and tempered to obtain a surface hardness of the order of 700HV .
  • the present invention solves the aforementioned problems by proposing a valve for regulating the fuel pressure in the common rail of the diesel injection system of the internal combustion engine of a vehicle.
  • the valve includes a body, a shaft, an actuator and a nozzle.
  • the nozzle itself comprises a fixed member provided with a nozzle seat in the center of which opens a discharge port connecting the common rail to a channel
  • the shaft is arranged axially sliding in the body and is moved by
  • Actuator so as to switch the nozzle between an open state of the discharge port, when the pressure in the common rail is greater than a preset limit, and a closed state of the discharge port, when the pressure in the common ramp is below the pre-established limit.
  • the valve further comprises a shutter member arranged between the shaft and the seat so that in closed state the shaft pushes the shutter member abutting against the seat closing the discharge port and, in the open state the fuel under pressure pushes the shutter member and opens the discharge port, the shaft being itself pushed by the shutter member.
  • This embodiment allows to decouple the roles between the tree that only pushes, and the shutter member whose role is to close.
  • the fixed member of the nozzle comprises a tubular portion defining an inner guide cylinder extending axially from a first open end to the seat forming the bottom of the guide cylinder.
  • the shutter member of the nozzle is arranged and guided in the guide cylinder, the guide cylinder being in fluid communication with the discharge channel opening on the outside.
  • the tubular portion of the fixed member is provided with a connecting orifice connecting the guide cylinder to the discharge channel so that in the open state of the nozzle, the fuel leaving the common rail passes successively through the discharge orifice. , the guide cylinder, the connecting orifice and the evacuation channel.
  • the body is provided with a housing in which the tubular portion is arranged, defining between them an intermediate tubular space into which the outlet channel and the connecting orifice open. In the open state of the nozzle, the fuel leaving the common ramp passes through the tabular space between the two before entering the evacuation channel.
  • the fixed member of the nozzle is further provided with an axial cylindrical base extending between two radial surfaces, so as to position the fixed member by arranging the base in a complementary counterbore, one of the two surfaces abutting the bottom of the counterbore.
  • the counterbore is provided in the valve body, the fixed member of the nozzle being integral with the body.
  • the common rail comprises among other things a countersink adapted to receive the nozzle, the base s' adjusting in the countersink, the fixed member being integral with the common rail.
  • the end of the obturator member cooperating with the seat has a spherical surface, or conical or ovoid, the seat having meanwhile a conical surface whose apex is directed towards the ramp.
  • a ball is interposed between the shutter member and the seat, the shutter member pressing on the ball, the ball having a size sufficient to close the discharge port.
  • the actuator is the core of an electromagnet controlled by a central unit.
  • the actuator is a compression spring permanently urging the shaft according to an axial force calibrated to the preset limit L of pressure, so that the shaft urges the nozzle towards the closed state.
  • the dimensional tolerance between the diameters of the axial bore and the shaft is 30 ⁇ .
  • the axial bore in which the shaft is guided has a surface roughness less than Ra 3.2.
  • the invention also relates to a common rail diesel fuel injection system comprising a valve made according to any one of the preceding claims.
  • Figure 1 is an axial sectional view of a high pressure valve according to the invention.
  • Figure 2 is a valve made in a second mode.
  • Figure 3 is an alternative mechanical valve that can be adapted to the modes of Figures 1 or 2.
  • Figure 4 is an enlarged view of the nozzle of the valve of the preceding figures.
  • Figures 1, 2 and 3 show a high pressure valve 10 to be mounted on the common rail 8 of the diesel injection system 6 of an internal combustion engine.
  • the valve 10 comprises a body 12 extending along a longitudinal axis A, an electromagnet 14 whose coil is integral with the body 12 and the core, movable in the body 12 , pilot a shaft 16 axially guided in a central bore 18 of the body 12 between a supported position PA and a withdrawn position PR.
  • a nozzle 24 switched by the shaft 16 in an open state EO, when the shaft 16 is in the withdrawn position PR, and a closed state EF when the shaft 16 is in the PA supported position.
  • the valve 10 is fixed to the ramp 8 by arranging a cylindrical surface of the body 12 in a space of the ramp 8 provided with a complementary female bore. A seal is placed at the interface between the body 12 and the ramp 8.
  • the nozzle 24, particularly detailed in Figure 4, essentially comprises a fixed member 22 cooperating with a movable shutter member 24.
  • the fixed member 22 extends axially along a cylindrical tubular portion 26 and then along a radial shoulder 28 leading to a cylindrical base 30 of larger diameter, the base 30 extending to a radial surface 32.
  • the base 30 complements complementarily in a counterbore 34.
  • the counterbore 34 is formed in the body 12 and the fixed member 22 is integral with the body 12, the radial shoulder 28 abutting against the bottom of the countersink 34.
  • the complementary countersink 34 is made in the ramp 8.
  • the base 30 fits into the countersink 34, the radial surface 32 being in abutment with the bottom of the countersink 34 so that the member fixed 22 is integral with the ramp 8.
  • the radial shoulder 28 is in turn abuts against the body 12.
  • the tubular portion 26 of the fixed member 22 is arranged in a cylindrical and axial housing 36 of the body 12, an intermediate tubular space 38 then being created between the fixed member 22 and the body 12. In this space 38 opens an evacuation channel 40 transverse made in the body 12.
  • the interior of the tubular portion 26 is a guide cylinder 42 terminating in a conical surface forming the seat 44 of the nozzle 20. At the center of the seat 44 opens a discharge port 46 extending axially through the base 30 to join the ramp 8.
  • the wall of the tubular portion 26 is provided with at least one connecting orifice 48 connecting the interspace 38 to the guide cylinder 42.
  • tubular portion 26 can be mounted fitted into the housing 36 without creating a spacer space.
  • the discharge channel 40 provided in the body 12 aligns directly with the connecting orifice 48.
  • the shutter member 24 is arranged and guided in the guide cylinder 42. According to the representations chosen for example, it has the shape of a needle tip extending from a planar radial surface 50 in contact with the shaft 16, in a first cylindrical portion 52 of an adjusted diameter sliding to the guide cylinder 42, then in a second conical portion 54 terminating in a point and cooperating with the seat 44 of the nozzle 20.
  • the shutter member 24 may have a spherical tip, or conical or otherwise, which also cooperates with the seat 44 for the same purpose.
  • the shutter element 24 may also be a simple ball on which the shaft 16 bears, the ball closing off the discharge orifice 46. It is also possible to insert between the shutter element 24 and the seat 44, a ball on which the shutter member 24 bears, the ball having a size just sufficient to close the discharge orifice 46.
  • valve 10 being assembled, the body 12, the shaft 16, the shutter member 24, the seat 44 and the discharge port 46 are aligned.
  • the pressurized fuel circulates in the ramp 8. Below a preselected limit pressure L, the electromagnet 14 keeps the shaft in the PA supported position. The end of the shaft 16 in contact against the radial surface 50 of the shutter member 24 urges it so that the conical portion 54 of the member shutter 24 is kept in complementary contact with the seat 44 and closes the discharge port 46.
  • the fuel pressure in the ramp 8 exceeds the preset limit L, the fuel pushes the shutter member 24 by pressing on its conical portion 54 and opens the discharge orifice 46.
  • the pressurized fuel can then be evacuated by passing successively from the ramp 8 to the discharge orifice 46 and then into the guide cylinder 42, through the connection orifice 48, in the interspace 38 to arrive in the evacuation channel 40.
  • the electromagnet is replaced by a compression spring 56 actuator permanently urging the shaft 16 towards the supported position PA.
  • the spring 56 exerts on the shaft 16 a force calibrated to the preselected limit pressure L of the fuel in the ramp 8. When the pressure in the ramp 8 exceeds said limit L, it overcomes the force of the spring 56 which compresses slightly leaving the When the pressure has fallen below the limit pressure L, the force exerted by the spring 56 prevails and the discharge orifice 46 is again closed.
  • the role of the shaft 16 is limited to that of the pusher of the shutter member 24 and the role of the shutter member 24 is for it to close the discharge port 46. From the point of view of manufacture the Machining tolerances are adapted to the role of each piece.
  • the shaft 16 and the axial bore 18 of the body 12 can be made taking into account firstly a dimensional tolerance of 30 ⁇ between their diameters, whereas it was 12 ⁇ previously and secondly , of a state quality of their surfaces of Ra 3.2 whereas it was Ra 1.6 previously.
  • the steel of the shutter member 24 remains of high quality, the steel used for the shaft 16 may be more ordinary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
  • Lift Valve (AREA)

Abstract

A nozzle (20) able to be arranged in a diesel injection system (6) of the internal combustion engine of a vehicle comprises a fixed member (22) provided with a nozzle seat (44) at the centre of which there opens a discharge orifice (46), the fixed member (22) comprising a cylindrical tubular part (26) defining an inner guide cylinder (42) extending axially (A) from an open first end as far as the seat (44) that forms the closed end of the guide cylinder (42), and a shut-off member (24) arranged and guided in the guide cylinder (42), the shut-off member (24) being able to move between a closed state (EF) when the shut-off member (24) is in abutment against the seat (44) and an open state (EO) when the shut-off member (24) opens the discharge orifice (46). A regulating valve (10) that regulates the fuel pressure in the diesel injection system (6) of an internal combustion engine of a vehicle comprises a body (12) in which an actuator (14) is arranged, the body being provided with an axial (A) bore (18), with a housing (36), with a counterbore (34) and with a discharge duct (40). The valve (10) additionally comprises a shaft (16) arranged axially (A), sliding in the bore (18). The valve (10) is able to accept the nozzle (20), the tubular part (26) being arranged in the housing (36) and the base (30) fitting into the counterbore (34) so as to define an intermediary tubular space (38) between the tubular part (26) and the housing (36) into which the discharge duct (40) opens, the shut-off member (24) being arranged between the shaft (16) and the seat (44). A common rail (8) of a diesel injection system (6) of the internal combustion engine of a vehicle comprises, amongst other things, a counterbore (34) able to accept the nozzle (20), the base (30) fitting into the counterbore (34), the fixed member (22) being attached to the common rail (8).

Description

BUSE, VANNE HAUTE PRESSION APTE A RECEVOIR LA BUSE ET RAMPE COMMUNE APTE A RECEVOIR LA BUSE DOMAINE TECHNIQUE  NOZZLE, HIGH PRESSURE VALVE FIT TO RECEIVE THE NOZZLE AND COMMON RAIL FIT TO RECEIVE THE NOZZLE TECHNICAL FIELD
L'invention est relative à une vanne haute pression pour circuit d'injection diesel et plus particulièrement l'agencement de ces composants et la fabrication de ceux-ci. ARRIERE-PLAN TECHNOLOGIQUE DE L'INVENTION  The invention relates to a high pressure valve for diesel injection circuit and more particularly the arrangement of these components and the manufacture thereof. BACKGROUND OF THE INVENTION
Les circuits d'injection directe de carburant dans les moteurs à combustion interne comprennent une vanne pilotée qui peut être en prise directe sur une rampe commune distribuant le carburant sous pression à des injecteurs. La vanne est  Direct fuel injection systems in internal combustion engines include a pilot operated valve that can be in direct contact with a common rail delivering pressurized fuel to injectors. The valve is
normalement en un état fermé et peut être commutée en un état ouvert de sorte de libérer un passage et laisser sortir du carburant permettant ainsi de réguler en normally in a closed state and can be switched to an open state so as to release a passage and let out fuel thus allowing to regulate
permanence la pression dans le circuit d'injection. permanently the pressure in the injection circuit.
On connaît entre autre des vannes comprenant un corps tubulaire dans lequel un arbre central axialement mobile obture ou libère le passage de sortie du carburant. L'arbre central a une extrémité plane au contact du noyau de  Valves are known including a tubular body in which an axially movable central shaft closes or releases the fuel outlet passage. The central shaft has a flat end in contact with the core of
Γ électroaimant et une extrémité pointue ou hémisphérique qui coopère avec un siège conique fixe au centre duquel débouche le passage de sortie. En Γ electromagnet and a pointed or hemispherical end which cooperates with a fixed conical seat in the center of which opens the outlet passage. In
fonctionnement normal le passage est fermé, le noyau de Γ électroaimant exerçant sur l'arbre central une force de fermeture supérieure à la force opposée exercée sur l'extrémité pointue de l'arbre par le carburant sous pression circulant dans la rampe commune. Normal operation the passage is closed, the core of Γ electromagnet exerting on the central shaft a closing force greater than the opposite force exerted on the pointed end of the shaft by the pressurized fuel flowing in the common rail.
L'arbre mobile est axialement guidé dans un alésage central du corps. Pour assurer l'obturation du passage de sortie, l'alésage central et l'arbre mobile doivent chacun avoir un excellent état de surface et un très faible défaut de cylindricité.  The movable shaft is axially guided in a central bore of the body. To ensure the closure of the outlet passage, the central bore and the movable shaft must each have an excellent surface state and a very low cylindricity defect.
L'assemblage doit également présenter un faible défaut de coaxialité. De plus, compte tenu des efforts importants et répétés qu'il subit, l'arbre mobile doit être réalisé en un acier de haute qualité, par exemple un acier 100Cr6 avec trempe et revenu pour obtenir une dureté en surface de l'ordre de 700HV. The assembly must also have a low coaxiality defect. In addition, given the large and repeated efforts it undergoes, the movable shaft must be made of a high quality steel, for example a 100Cr6 steel quenched and tempered to obtain a surface hardness of the order of 700HV .
Cette haute précision d'usinage génère une complexité technologique qu'il est devenu urgent de simplifier en proposant des vannes au fonctionnement parfait tout en étant simple à fabriquer et assembler. RESUME DE L'INVENTION This high machining precision generates a technological complexity that has become urgent to simplify by proposing valves with perfect operation while being simple to manufacture and assemble. SUMMARY OF THE INVENTION
La présente invention résout les problèmes ci-dessus mentionnés en proposant une vanne de régulation de la pression du carburant dans la rampe commune du système d'injection diesel du moteur à combustion interne d'un véhicule. La vanne comprend un corps, un arbre, un actuateur et une buse. La buse comprend elle-même un membre fixe pourvu d'un siège de buse au centre duquel débouche un orifice de décharge reliant la rampe commune à un canal  The present invention solves the aforementioned problems by proposing a valve for regulating the fuel pressure in the common rail of the diesel injection system of the internal combustion engine of a vehicle. The valve includes a body, a shaft, an actuator and a nozzle. The nozzle itself comprises a fixed member provided with a nozzle seat in the center of which opens a discharge port connecting the common rail to a channel
d'évacuation. discharge.
L'arbre est agencé axialement glissant dans le corps et est déplacé par The shaft is arranged axially sliding in the body and is moved by
Γ actuateur de sorte à faire commuter la buse entre un état ouvert de l'orifice de décharge, lorsque la pression dans la rampe commune est supérieure à une limite préétablie, et un état fermé de l'orifice de décharge, lorsque la pression dans la rampe commune est inférieure à la limite préétablie. Actuator so as to switch the nozzle between an open state of the discharge port, when the pressure in the common rail is greater than a preset limit, and a closed state of the discharge port, when the pressure in the common ramp is below the pre-established limit.
Avantageusement, la vanne comprend en outre un membre obturateur agencé entre l'arbre et le siège de sorte qu'en état fermé l'arbre pousse le membre obturateur en butée contre le siège obturant l'orifice de décharge et, en état ouvert le carburant sous pression repousse le membre obturateur et ouvre l'orifice de décharge, l'arbre étant lui-même repoussé par le membre obturateur. Cette réalisation permet de découpler les rôles entre l'arbre qui ne fait que pousser, et le membre obturateur dont le rôle est d'obturer.  Advantageously, the valve further comprises a shutter member arranged between the shaft and the seat so that in closed state the shaft pushes the shutter member abutting against the seat closing the discharge port and, in the open state the fuel under pressure pushes the shutter member and opens the discharge port, the shaft being itself pushed by the shutter member. This embodiment allows to decouple the roles between the tree that only pushes, and the shutter member whose role is to close.
Le membre fixe de la buse comprend une partie tubulaire définissant un cylindre intérieur de guidage s 'étendant axialement d'une première extrémité ouverte jusqu'au siège formant le fond du cylindre de guidage. Le membre obturateur de la buse est agencé et guidé dans le cylindre de guidage, le cylindre de guidage étant en communication de fluide avec le canal d'évacuation débouchant sur l'extérieur.  The fixed member of the nozzle comprises a tubular portion defining an inner guide cylinder extending axially from a first open end to the seat forming the bottom of the guide cylinder. The shutter member of the nozzle is arranged and guided in the guide cylinder, the guide cylinder being in fluid communication with the discharge channel opening on the outside.
La partie tubulaire du membre fixe est pourvue d'un orifice de liaison reliant le cylindre de guidage au canal d'évacuation de sorte qu'en état ouvert de la buse, le carburant sortant de la rampe commune passe successivement par l'orifice de décharge, le cylindre de guidage, l'orifice de liaison et le canal d'évacuation. Le corps est pourvu d'un logement dans lequel la partie tubulaire s'agence, définissant entre eux un espace tubulaire intercalaire dans lequel débouchent le canal d'évacuation et l'orifice de liaison. En état ouvert de la buse, le carburant sortant de la rampe commune passe par l'espace tabulaire intercalaire avant d'entrer dans le canal d'évacuation. The tubular portion of the fixed member is provided with a connecting orifice connecting the guide cylinder to the discharge channel so that in the open state of the nozzle, the fuel leaving the common rail passes successively through the discharge orifice. , the guide cylinder, the connecting orifice and the evacuation channel. The body is provided with a housing in which the tubular portion is arranged, defining between them an intermediate tubular space into which the outlet channel and the connecting orifice open. In the open state of the nozzle, the fuel leaving the common ramp passes through the tabular space between the two before entering the evacuation channel.
Le membre fixe de la buse est de plus pourvu d'une embase cylindrique axiale s 'étendant entre deux surfaces radiales, de sorte à positionner le membre fixe en agençant l'embase dans un lamage complémentaire, une des deux surfaces, étant en butée au fond du lamage.  The fixed member of the nozzle is further provided with an axial cylindrical base extending between two radial surfaces, so as to position the fixed member by arranging the base in a complementary counterbore, one of the two surfaces abutting the bottom of the counterbore.
Dans une alternative le lamage est pourvu dans le corps de vanne, le membre fixe de la buse étant solidaire du corps.  In an alternative, the counterbore is provided in the valve body, the fixed member of the nozzle being integral with the body.
Dans une autre alternative la rampe commune comprend entre autre un lamage apte à recevoir la buse, l'embase s 'ajustant dans le lamage, le membre fixe étant solidaire de la rampe commune.  In another alternative, the common rail comprises among other things a countersink adapted to receive the nozzle, the base s' adjusting in the countersink, the fixed member being integral with the common rail.
L'extrémité du membre obturateur coopérant avec le siège a une surface sphérique, ou conique ou ovoïde, le siège ayant quant à lui une surface conique dont l'apex est dirigé vers la rampe. Alternativement une bille est intercalée entre l'élément obturateur et le siège, l'élément obturateur appuyant sur la bille, la bille ayant une taille suffisante pour obturer l'orifice de décharge.  The end of the obturator member cooperating with the seat has a spherical surface, or conical or ovoid, the seat having meanwhile a conical surface whose apex is directed towards the ramp. Alternatively a ball is interposed between the shutter member and the seat, the shutter member pressing on the ball, the ball having a size sufficient to close the discharge port.
L'actuateur est le noyau d'un électroaimant piloté par une unité centrale. The actuator is the core of an electromagnet controlled by a central unit.
Dans une variante, l'actuateur est un ressort de compression sollicitant en permanence l'arbre selon une force axiale tarée à la limite préétablie L de pression, de sorte que l'arbre sollicite la buse vers l'état fermé. In a variant, the actuator is a compression spring permanently urging the shaft according to an axial force calibrated to the preset limit L of pressure, so that the shaft urges the nozzle towards the closed state.
Avantageusement, la tolérance dimensionnelle entre les diamètres de l'alésage axial et de l'arbre est de 30 μιη.  Advantageously, the dimensional tolerance between the diameters of the axial bore and the shaft is 30 μιη.
Similairement, l'alésage axial dans lequel est guidé l'arbre a une rugosité de surface inférieure à Ra 3,2.  Similarly, the axial bore in which the shaft is guided has a surface roughness less than Ra 3.2.
L'invention est également relative à un système d'injection de carburant diesel à rampe commune comprenant une vanne réalisée selon l'une quelconque des revendications précédentes.  The invention also relates to a common rail diesel fuel injection system comprising a valve made according to any one of the preceding claims.
DESCRIPTION DES FIGURES DESCRIPTION OF THE FIGURES
Un mode de réalisation de l'invention est maintenant décrit par l'intermédiaire des figures suivantes.  An embodiment of the invention is now described through the following figures.
La Figure 1 est une vue en coupe axiale d'une vanne haute pression selon l'invention.  Figure 1 is an axial sectional view of a high pressure valve according to the invention.
La Figure 2 est une vanne réalisé selon un second mode. La Figure 3 est une alternative de vanne mécanique pouvant être adaptée aux modes des Figures 1 ou 2. Figure 2 is a valve made in a second mode. Figure 3 is an alternative mechanical valve that can be adapted to the modes of Figures 1 or 2.
La Figure 4 est une vue grossie de la buse de la vanne des Figures précédentes.  Figure 4 is an enlarged view of the nozzle of the valve of the preceding figures.
DESCRIPTION DES MODES DE REALISATION PRÉFÉRÉS DESCRIPTION OF PREFERRED EMBODIMENTS
Les Figures 1, 2 et 3 représentent une vanne haute pression 10 destinée à être montée sur la rampe commune 8 du système d'injection diesel 6 d'un moteur à combustion interne.  Figures 1, 2 and 3 show a high pressure valve 10 to be mounted on the common rail 8 of the diesel injection system 6 of an internal combustion engine.
Selon un mode préféré de réalisation illustrée par les Figures 1 et 2, la vanne 10 comprend un corps 12 s 'étendant selon un axe longitudinal A, un électroaimant 14 dont la bobine est solidaire du corps 12 et le noyau, mobile dans le corps 12, pilote un arbre 16 axialement guidé dans un alésage central 18 du corps 12 entre une position appuyée PA et une position retirée PR. à l'extrémité du corps 12, opposée à Γ électroaimant 14, est agencée une buse 24 commutée par l'arbre 16 en un état ouvert EO, lorsque l'arbre 16 est en position retirée PR, et un état fermé EF lorsque l'arbre 16 est en position appuyée PA. La vanne 10 est fixée à la rampe 8 en agençant une surface cylindrique du corps 12 dans un espace de la rampe 8 pourvu d'un alésage femelle complémentaire. Un joint d'étanchéité est placé à l'interface entre le corps 12 et la rampe 8.  According to a preferred embodiment illustrated in Figures 1 and 2, the valve 10 comprises a body 12 extending along a longitudinal axis A, an electromagnet 14 whose coil is integral with the body 12 and the core, movable in the body 12 , pilot a shaft 16 axially guided in a central bore 18 of the body 12 between a supported position PA and a withdrawn position PR. at the end of the body 12, opposite to the electromagnet 14, is arranged a nozzle 24 switched by the shaft 16 in an open state EO, when the shaft 16 is in the withdrawn position PR, and a closed state EF when the shaft 16 is in the PA supported position. The valve 10 is fixed to the ramp 8 by arranging a cylindrical surface of the body 12 in a space of the ramp 8 provided with a complementary female bore. A seal is placed at the interface between the body 12 and the ramp 8.
La buse 24, particulièrement détaillée dans la Figure 4, comprend essentiellement un membre fixe 22 coopérant avec un membre obturateur 24 mobile.  The nozzle 24, particularly detailed in Figure 4, essentially comprises a fixed member 22 cooperating with a movable shutter member 24.
Le membre fixe 22 s'étend axialement selon une partie tubulaire 26 cylindrique puis selon un épaulement 28 radial menant à une embase 30 cylindrique de plus grand diamètre, l'embase 30 s'étendant jusqu'à surface radiale 32.  The fixed member 22 extends axially along a cylindrical tubular portion 26 and then along a radial shoulder 28 leading to a cylindrical base 30 of larger diameter, the base 30 extending to a radial surface 32.
L'embase 30 s'agence complémentairement dans un lamage 34. Selon la construction de la Figure 1, le lamage 34 est réalisé dans le corps 12 et, le membre fixe 22 est solidaire du corps 12, l'épaulement radial 28 étant en butée contre le fond du lamage 34. The base 30 complements complementarily in a counterbore 34. According to the construction of Figure 1, the counterbore 34 is formed in the body 12 and the fixed member 22 is integral with the body 12, the radial shoulder 28 abutting against the bottom of the countersink 34.
Dans la construction alternative illustrée par la Figure 2, le lamage 34 complémentaire est réalisé dans la rampe 8. L'embase 30 s'ajuste dans le lamage 34, la surface radiale 32 étant en butée au fond du lamage 34 de sorte que le membre fixe 22 est solidaire de la rampe 8. L'épaulement radial 28 est quant à lui en butée contre le corps 12. In the alternative construction illustrated in FIG. 2, the complementary countersink 34 is made in the ramp 8. The base 30 fits into the countersink 34, the radial surface 32 being in abutment with the bottom of the countersink 34 so that the member fixed 22 is integral with the ramp 8. The radial shoulder 28 is in turn abuts against the body 12.
La partie tubulaire 26 du membre fixe 22 s'agence dans un logement 36 cylindrique et axial du corps 12, un espace tubulaire intercalaire 38 étant alors créé entre le membre fixe 22 et le corps 12. Dans cet espace 38 débouche un canal d'évacuation 40 transverse réalisé dans le corps 12.  The tubular portion 26 of the fixed member 22 is arranged in a cylindrical and axial housing 36 of the body 12, an intermediate tubular space 38 then being created between the fixed member 22 and the body 12. In this space 38 opens an evacuation channel 40 transverse made in the body 12.
L'intérieur de la partie tubulaire 26 est un cylindre de guidage 42 se terminant par une surface conique formant le siège 44 de la buse 20. Au centre du siège 44 débouche un orifice de décharge 46 s 'étendant axialement au travers de l'embase 30 pour rejoindre la rampe 8. La paroi de la partie tubulaire 26 est pourvue d'au moins un orifice de liaison 48 reliant l'espace intercalaire 38 au cylindre de guidage 42.  The interior of the tubular portion 26 is a guide cylinder 42 terminating in a conical surface forming the seat 44 of the nozzle 20. At the center of the seat 44 opens a discharge port 46 extending axially through the base 30 to join the ramp 8. The wall of the tubular portion 26 is provided with at least one connecting orifice 48 connecting the interspace 38 to the guide cylinder 42.
Alternativement, la partie tubulaire 26 peut être montée ajustée dans le logement 36 sans créer d'espace intercalaire. Dans ce cas le canal d'évacuation 40 pourvu dans le corps 12 s'aligne directement avec l'orifice de liaison 48.  Alternatively, the tubular portion 26 can be mounted fitted into the housing 36 without creating a spacer space. In this case, the discharge channel 40 provided in the body 12 aligns directly with the connecting orifice 48.
Le membre obturateur 24 est agencé et guidé dans le cylindre de guidage 42. Selon les représentations choisies en exemple, il a la forme d'un embout d'aiguille s 'étendant depuis une surface radiale 50 plane en contact avec l'arbre 16, selon une première partie cylindrique 52 d'un diamètre ajusté glissant au cylindre de guidage 42, puis selon une seconde partie conique 54 se terminant en pointe et coopérant avec le siège 44 de la buse 20.  The shutter member 24 is arranged and guided in the guide cylinder 42. According to the representations chosen for example, it has the shape of a needle tip extending from a planar radial surface 50 in contact with the shaft 16, in a first cylindrical portion 52 of an adjusted diameter sliding to the guide cylinder 42, then in a second conical portion 54 terminating in a point and cooperating with the seat 44 of the nozzle 20.
Alternativement à l'embout d'aiguille décrit, le membre obturateur 24 peut avoir un embout sphérique, ou conique ou autre, qui coopère également avec le siège 44 dans le même but. L'élément obturateur 24 peut également être une simple bille sur laquelle appui l'arbre 16, la bille venant obturer l'orifice de décharge 46. Il est également envisageable d'intercaler entre l'élément obturateur 24 et le siège 44, une bille sur laquelle l'élément obturateur 24 appui, la bille ayant une taille juste suffisante pour obturer l'orifice de décharge 46.  Alternatively to the needle tip described, the shutter member 24 may have a spherical tip, or conical or otherwise, which also cooperates with the seat 44 for the same purpose. The shutter element 24 may also be a simple ball on which the shaft 16 bears, the ball closing off the discharge orifice 46. It is also possible to insert between the shutter element 24 and the seat 44, a ball on which the shutter member 24 bears, the ball having a size just sufficient to close the discharge orifice 46.
La vanne 10 étant assemblée, le corps 12, l'arbre 16, l'élément obturateur 24, le siège 44 et l'orifice de décharge 46 sont alignés.  The valve 10 being assembled, the body 12, the shaft 16, the shutter member 24, the seat 44 and the discharge port 46 are aligned.
En fonctionnement, le carburant sous pression circule dans la rampe 8. En dessous d'une pression limite préétablie L, Γ électroaimant 14 maintient l'arbre en position appuyée PA. L'extrémité de l'arbre 16 en contact contre la surface radiale 50 du membre obturateur 24 le sollicite de sorte que la partie conique 54 du membre obturateur 24 soit maintenue en contact complémentaire avec le siège 44 et obture l'orifice de décharge 46. Lorsque la pression du carburant dans la rampe 8 excède la limite L préétablie, le carburant repousse le membre obturateur 24 en appuyant sur sa partie conique 54 et ouvre l'orifice de décharge 46. Le carburant sous pression peut alors être évacué en passant successivement de la rampe 8 à l'orifice de décharge 46 puis dans le cylindre de guidage 42, au travers de l'orifice de liaison 48, dans l'espace intercalaire 38 pour arriver dans le canal d'évacuation 40. In operation, the pressurized fuel circulates in the ramp 8. Below a preselected limit pressure L, the electromagnet 14 keeps the shaft in the PA supported position. The end of the shaft 16 in contact against the radial surface 50 of the shutter member 24 urges it so that the conical portion 54 of the member shutter 24 is kept in complementary contact with the seat 44 and closes the discharge port 46. When the fuel pressure in the ramp 8 exceeds the preset limit L, the fuel pushes the shutter member 24 by pressing on its conical portion 54 and opens the discharge orifice 46. The pressurized fuel can then be evacuated by passing successively from the ramp 8 to the discharge orifice 46 and then into the guide cylinder 42, through the connection orifice 48, in the interspace 38 to arrive in the evacuation channel 40.
Dans un autre mode de réalisation illustrée par la Figure 3, Γ électroaimant est remplacé par un ressort de compression 56 actuateur sollicitant en permanence l'arbre 16 vers la position appuyée PA. Le ressort 56 exerce sur l'arbre 16 une force tarée à la pression limite L préétablie du carburant dans la rampe 8. Lorsque la pression dans la rampe 8 excède ladite limite L, elle vainc la force du ressort 56 qui se comprime légèrement laissant le carburant s'évacuer par l'orifice de décharge 46. Lorsque la pression est redescendue sous la pression limite L, la force exercée par le ressort 56 prévaut et l'orifice de décharge 46 est à nouveau obturé.  In another embodiment illustrated in FIG. 3, the electromagnet is replaced by a compression spring 56 actuator permanently urging the shaft 16 towards the supported position PA. The spring 56 exerts on the shaft 16 a force calibrated to the preselected limit pressure L of the fuel in the ramp 8. When the pressure in the ramp 8 exceeds said limit L, it overcomes the force of the spring 56 which compresses slightly leaving the When the pressure has fallen below the limit pressure L, the force exerted by the spring 56 prevails and the discharge orifice 46 is again closed.
Le rôle de l'arbre 16 est limité à celui de poussoir de l'élément obturateur 24 et le rôle de l'élément obturateur 24 est quant à lui d'obturer l'orifice de décharge 46. Du point de vu de la fabrication les tolérances d'usinages sont adaptées au rôle de chaque pièce. Ainsi, l'arbre 16 et l'alésage axial 18 du corps 12 peuvent être réalisés en tenant compte d'une part d'une tolérance dimensionnelle de 30μιη entre leurs diamètres, alors qu'elle était de 12 μιη précédemment et d'autre part, d'une qualité d'état de leurs surfaces de Ra 3,2 alors qu'elle était de Ra 1,6 précédemment. Enfin, si l'acier du membre obturateur 24 demeure de haute qualité, l'acier utilisé pour l'arbre 16 peut être plus ordinaire.  The role of the shaft 16 is limited to that of the pusher of the shutter member 24 and the role of the shutter member 24 is for it to close the discharge port 46. From the point of view of manufacture the Machining tolerances are adapted to the role of each piece. Thus, the shaft 16 and the axial bore 18 of the body 12 can be made taking into account firstly a dimensional tolerance of 30μιη between their diameters, whereas it was 12 μιη previously and secondly , of a state quality of their surfaces of Ra 3.2 whereas it was Ra 1.6 previously. Finally, if the steel of the shutter member 24 remains of high quality, the steel used for the shaft 16 may be more ordinary.

Claims

REVENDICATIONS
1. Buse (20) apte à être agencée dans un système d'injection diesel (6) du moteur à combustion interne d'un véhicule, caractérisée en ce que la buse (20) comprend 1. Nozzle (20) adapted to be arranged in a diesel injection system (6) of the internal combustion engine of a vehicle, characterized in that the nozzle (20) comprises
un membre fixe (22) pourvu d'un siège (44) de buse au centre duquel débouche un orifice de décharge (46), le membre fixe (22) comprenant une partie tubulaire (26) cylindrique définissant un cylindre intérieur de guidage (42) s'étendant axialement (A) d'une première extrémité ouverte jusqu'au siège (44) formant le fond du cylindre de guidage (42), et  a fixed member (22) having a nozzle seat (44) at the center of which a discharge port (46) opens out, the fixed member (22) comprising a cylindrical tubular portion (26) defining an inner guide cylinder (42); ) extending axially (A) from a first open end to the seat (44) forming the bottom of the guide cylinder (42), and
un membre obturateur (24) agencé et guidé dans le cylindre de guidage (42), le membre obturateur (24) pouvant se déplacer entre un état fermé (EF) lorsque le membre obturateur (24) est en butée contre le siège (44) et un état ouvert (EO) lorsque le membre obturateur (24) libère l'orifice de décharge (46).  a shutter member (24) arranged and guided in the guide cylinder (42), the shutter member (24) being movable between a closed state (EF) when the shutter member (24) abuts the seat (44) and an open state (EO) when the shutter member (24) releases the discharge port (46).
2. Buse (20) selon la revendication précédente dans laquelle la partie tubulaire (26) du membre fixe (22) est pourvue d'un orifice de liaison (48) reliant le cylindre de guidage (42) à l'extérieur. 2. Nozzle (20) according to the preceding claim wherein the tubular portion (26) of the fixed member (22) is provided with a connecting port (48) connecting the guide cylinder (42) to the outside.
3. Buse (20) selon l'une quelconque des revendications précédentes dans laquelle le membre fixe (22) est de plus pourvu d'une embase (30) cylindrique axiale s'étendant entre deux surfaces radiales (28, 32), prévue pour être agencée dans un lamage (34) complémentaire. A nozzle (20) according to any one of the preceding claims wherein the fixed member (22) is further provided with an axial cylindrical base (30) extending between two radial surfaces (28, 32), provided for be arranged in a complementary countersink (34).
4. Buse (20) selon l'une quelconque des revendications précédentes dans laquelle l'extrémité du membre obturateur (24) coopérant avec le siège (44) a une surface sphérique, le siège (44) ayant quant à lui une surface conique. 4. Nozzle (20) according to any one of the preceding claims wherein the end of the shutter member (24) cooperating with the seat (44) has a spherical surface, the seat (44) having a conical surface.
5. Buse (20) selon l'une quelconque des revendications précédentes dans laquelle une bille est intercalée entre l'élément obturateur (24) et le siège (44), l'élément obturateur (24) appuyant sur la bille, la bille ayant une taille suffisante pour obturer l'orifice de décharge (46). 5. Nozzle (20) according to any preceding claim wherein a ball is interposed between the shutter member (24) and the seat (44), the shutter member (24) pressing on the ball, the ball having a size sufficient to close the discharge port (46).
6. Vanne de régulation (10) de la pression du carburant dans un système d'injection diesel (6) d'un moteur à combustion interne d'un véhicule, la vanne (10) comprenant un corps (12) dans lequel est agencé un actuateur (14), le corps étant pourvu d'un alésage (18) axial (A), d'un logement (36), d'un lamage (34) et d'un canal d'évacuation (40), la vanne (10) comprend de plus un arbre (16) agencé axialement (A) glissant dans l'alésage (18), la vanne (10) étant apte à recevoir une buse (10) réalisée selon la revendication 3, la partie tubulaire (26) s 'agençant dans le logement (36) et l'embase (30) s'agençant dans le lamage (34) de sorte à définir un espace tubulaire intercalaire (38) entre la partie tubulaire (26) et le logement (36) dans lequel débouche le canal d'évacuation (40), le membre obturateur (24) étant agencé entre l'arbre (16) et le siège (44). 6. Control valve (10) for the fuel pressure in a diesel injection system (6) of an internal combustion engine of a vehicle, the valve (10) comprising a body (12) in which is arranged an actuator (14), the body being provided with an axial bore (18) (A), a housing (36), a counterbore (34) and an evacuation channel (40), the valve (10) further comprises a shaft (16) axially arranged (A) sliding in the bore (18), the valve (10) being adapted to receive a nozzle (10) made according to claim 3, the tubular part ( 26) arranged in the housing (36) and the base (30) in the countersink (34) so as to define an intermediate tubular space (38) between the tubular portion (26) and the housing (36). ) into which the discharge channel (40) opens, the shutter member (24) being arranged between the shaft (16) and the seat (44).
7. Vanne (10) selon la revendication 6 dans laquelle Γ actuateur (14) est le noyau d'un électroaimant piloté par une unité centrale. 7. Valve (10) according to claim 6 wherein Γ actuator (14) is the core of an electromagnet controlled by a central unit.
8. Vanne (10) selon la revendications 6 dans laquelle Γ actuateur (14) est un ressort de compression (56) sollicitant en permanence l'arbre (16) selon une force axiale tarée à une limite préétablie (L) de pression, de sorte à faire commuter la buse (20) entre l'état ouvert (EO) de l'orifice de décharge (46), lorsque la pression du carburant est supérieure à la limite (L) préétablie, et l'état fermé (EF) de l'orifice de décharge (46), lorsque la pression du carburant est inférieure à la limite préétablie (L). 8. Valve (10) according to claim 6 wherein Γ actuator (14) is a compression spring (56) permanently urging the shaft (16) according to an axial force calibrated to a preset limit (L) pressure, causing the nozzle (20) to switch between the open state (EO) of the discharge port (46), when the fuel pressure is above the preset limit (L), and the closed state (EF) the discharge port (46) when the fuel pressure is below the predetermined limit (L).
9. Vanne (10) selon l'une quelconque des revendications 6 à 8 dans laquelle la tolérance dimensionnelle entre les diamètres de l'alésage (18) axial et de l'arbre9. Valve (10) according to any one of claims 6 to 8 wherein the dimensional tolerance between the diameters of the bore (18) axial and the shaft
(16) est de 30 μιη. (16) is 30 μιη.
10. Vanne (10) selon l'une quelconque des revendications 6 à 9 dans laquelle l'alésage axial (18) dans lequel est guidé l'arbre (16) a une rugosité de surface inférieure à Ra 3,2. 10. Valve (10) according to any one of claims 6 to 9 wherein the axial bore (18) in which the shaft (16) is guided has a surface roughness less than Ra 3.2.
11. Rampe commune (8) d'un système d'injection diesel (6) du moteur à combustion interne d'un véhicule comprenant entre autre un lamage (34) apte à recevoir une buse (20) réalisée selon la revendications 3, l'embase (30) s'ajustant dans le lamage (34), le membre fixe (22) étant solidaire de la rampe commune (8). 11. Common rail (8) of a diesel injection system (6) of the internal combustion engine of a vehicle comprising inter alia a countersink (34) adapted to receive a nozzle (20) made according to claim 3, l base (30) adjusting in the countersink (34), the fixed member (22) being integral with the common rail (8).
12. Système d'injection (6) de carburant diesel du moteur à combustion interne d'un véhicule comprenant une buse (20) réalisée selon l'une quelconque des revendications 1 à 5. 12. Diesel fuel injection system (6) of the internal combustion engine of a vehicle comprising a nozzle (20) made according to any one of claims 1 to 5.
13. Système d'injection (6) selon la revendication 12 comprenant une vanne de régulation (10) réalisée selon l'une quelconque des revendications 6 à 10. 13. Injection system (6) according to claim 12 comprising a control valve (10) made according to any one of claims 6 to 10.
14. Système d'injection (6) selon la revendication 12 comprenant une rampe commune (8) réalisée selon la revendication 11. 14. Injection system (6) according to claim 12 comprising a common rail (8) made according to claim 11.
EP13817903.1A 2012-12-18 2013-12-12 Nozzle, high-pressure valve able to accept the nozzle and common rail able to accept the nozzle Withdrawn EP2935863A1 (en)

Priority Applications (1)

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EP18177234.4A EP3404250A1 (en) 2012-12-18 2013-12-12 High pressure valve

Applications Claiming Priority (2)

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FR1262266A FR2999658A1 (en) 2012-12-18 2012-12-18 HIGH PRESSURE VALVE
PCT/EP2013/076450 WO2014095595A1 (en) 2012-12-18 2013-12-12 Nozzle, high-pressure valve able to accept the nozzle and common rail able to accept the nozzle

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EP13817903.1A Withdrawn EP2935863A1 (en) 2012-12-18 2013-12-12 Nozzle, high-pressure valve able to accept the nozzle and common rail able to accept the nozzle

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EP (2) EP3404250A1 (en)
JP (1) JP6378692B2 (en)
KR (1) KR101709105B1 (en)
CN (1) CN104870803B (en)
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Publication number Publication date
EP3404250A1 (en) 2018-11-21
FR2999658A1 (en) 2014-06-20
CN104870803B (en) 2018-01-12
JP6378692B2 (en) 2018-08-22
US20160201632A1 (en) 2016-07-14
CN104870803A (en) 2015-08-26
WO2014095595A1 (en) 2014-06-26
JP2016505757A (en) 2016-02-25
US9677524B2 (en) 2017-06-13
KR20150082630A (en) 2015-07-15
KR101709105B1 (en) 2017-02-22

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