EP3027884B1 - Integrated arrangement of a high-pressure valve and an injection ramp - Google Patents
Integrated arrangement of a high-pressure valve and an injection ramp Download PDFInfo
- Publication number
- EP3027884B1 EP3027884B1 EP14741873.5A EP14741873A EP3027884B1 EP 3027884 B1 EP3027884 B1 EP 3027884B1 EP 14741873 A EP14741873 A EP 14741873A EP 3027884 B1 EP3027884 B1 EP 3027884B1
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- EP
- European Patent Office
- Prior art keywords
- valve
- arrangement
- rail
- seat
- ramp
- 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.)
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Links
- 238000002347 injection Methods 0.000 title claims description 8
- 239000007924 injection Substances 0.000 title claims description 8
- 239000000446 fuel Substances 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims 4
- 230000000295 complement effect Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
Definitions
- the present invention relates to a valve limiting the fuel pressure in the common rail of a fuel injection system.
- the common rail fuel injection systems are provided with a high pressure valve arranged at the end of ramp.
- the normally closed valve is intended to open when the pressure in the ramp exceeds a predetermined threshold.
- a valve whose body comprises an electromagnet cooperating with an axially sliding needle to control an outlet orifice formed in a seat itself arranged in the body.
- the valve body is partly threaded and screwed to the end of the boom.
- the outlet port communicates with a low pressure chamber disposed in the valve body around the end of the needle and a return channel radially traverses the valve body and the ramp extending from the low pressure chamber. to a low pressure tank.
- This arrangement is cumbersome, requires numerous complementary machining on the valve and the ramp and imposes an angular matching allowing the alignment of the sections of the return channel of the valve body and the ramp.
- the present invention aims to solve these problems by proposing an arrangement of a high pressure valve at one end of the common rail of a fuel injection system as defined in claim 1.
- the high pressure channel of the ramp opens at said end of the ramp and the valve has a body in which a shutter member, movable along a main axis, is provided to cooperate with a seat surrounding an outlet orifice so as to close said opening or to open it when the fuel pressure in the boom exceeds a predetermined threshold.
- the fuel is then evacuated to an outlet channel.
- the arrangement further comprises a restrictor plug arranged at the end of the ramp.
- the outlet orifice which restricts the section of the high pressure channel and the valve seat are both provided in the restrictor plug.
- the outlet channel is integrally formed in the valve body without having a common part with the ramp.
- the valve further comprises a chamber provided in the body and arranged to receive fuel exiting the outlet port, the outlet channel extending from said chamber and passing through the valve body. More particularly, the outlet channel extends radially through the valve body.
- valve is of the active type, the shutter member cooperating with an actuator such as an electromagnet.
- the shutter member is a needle with a pointed end is provided to cooperate with the seat.
- the shutter member may comprise a pusher acting on a ball provided to cooperate with the seat.
- valve body is provided with fixing means for securing the valve to the ramp.
- the valve is clipped at the end of the ramp and thus, the valve can be rotated relative to the ramp so as to adjust its angular orientation.
- the invention also relates to a high pressure valve designed to be arranged at the end of the common rail of a fuel injection system according to any one of the preceding claims.
- a first non-limiting embodiment of the arrangement 60 of a valve 10 at the end of the common ramp 12 of a fuel injection system is now described with reference to FIG. figure 1 .
- the ramp 12 extends along a main axis A and the high pressure channel 14, which extends axially in the ramp 12, opens at one end 16 of the ramp 12 in a countersink 18 forming with the channel 14 a radial surface 20
- a restrictor plug 22 of tubular cylindrical shape is arranged in the counterbore 18, and abuts against the radial surface 20.
- the outer diameter of the restrictor plug is adjusted tight to that of the counterbore 18 so that the restrictor plug 22 is assembled and held in place by pressing.
- the restrictor plug 22 is provided with an outlet opening 24 extending axially A and limiting the section of the channel 14, the outlet orifice 24 opening widening into a truncated cone and forming a seat 26.
- the restrictor plug can be attached to the boom by other means than tight fitting. It can in particular be screwed into the countersink 18. It can also be glued in position.
- valve 10 At the end of the ramp 12 is arranged the valve 10 whose body 30 is clipped at the end of ramp 12.
- the clipping of the valve body 30 on the ramp 12 requires complementary surfaces which will be described further and which are moreover detailed in the application FR1357558 tabled today.
- the valve body 30 is generally cylindrical, made of magnetic steel and constitutes the casing of an electromagnet 32 whose coil 34 is axially arranged in the body 30.
- the body 30 is further provided with an axial bore 36 and opening into which is slidably arranged a needle 38, a pointed end 40 cooperates with the seat 26 and the other end 42 remote is secured to a flat disk-shaped magnetic core 44 covering the coil 34.
- the needle 38 acts as a pusher on a ball 46 which co-operates with the seat 26.
- other electromagnet structures may be used, in particular the conventional assembly in which the core is axially arranged in the center of the coil.
- an axial cylindrical chamber 48 is made in body 30 and faces the seat 26.
- the bore 36 opens into the chamber 48 and the needle 38 extends in the center of said chamber 48.
- the bore 36 opens into another axial counterbore 50 so that the central portion of the bore which axially guides the needle 38 is reduced.
- this other bore 50 can be arranged a spring, not shown, compressed between the bottom of the bore 50 and the core 44 so as to permanently urge the needle 38 to the open position.
- the high pressure channel 14, the restrictor plug 22, the outlet orifice 24, the needle 38, the bore 36, the cylindrical chamber 48 and the said other counterbore 50 are coaxial A.
- an outlet channel 52 extends radially from the cylindrical chamber 48 and passes through the body 30 where it is continued by a discharge pipe 54.
- the chamber 48 is entirely formed in the Also, the outlet channel 52 extends entirely into the body 30 without having a common portion with the ramp 12.
- the valve body 30 is further covered by a bell cover 56 fixed to the body 30 and enclosing the magnetic core 44 in a sealed manner with a first O-ring.
- the body 30 is arranged at the end of ramp 12 in a male engagement, for the ramp 12, female for the valve 10. According to the top-to-bottom orientation of the figure, and without limiting the invention, the body 30 and the ramp 12 are engaged along cylindrical surfaces of complementary revolution.
- the seal between the valve and the boom is provided by another O-ring.
- the body 30 is then provided with a groove in which is arranged an annular protuberance of the ramp.
- the protuberance and the groove are in elastic contact along a conical surface whose apex is hard on the main axis A and located on the side of the ramp. In this way, the body is deformed by expanding elastically so that the protuberance can engage in the groove.
- the body When the engagement is made, the body partially resumes its shape while maintaining a residual elastic deformation which generates on the body an axial force directed towards the ramp and which closes the valve against the end of the ramp. Placement by elastic deformation can be facilitated by forming crenellated and wedged cutouts in the body to form angular sectors that deform more easily than a continuous cylinder.
- the valve Once in place, the valve is held axially in abutment against the end 16 of the ramp and also radially thanks to the cylindrical surfaces. The valve may further be rotated with respect to the ramp in order to adjust the angular orientation of the exhaust pipe 54.
- valve 10 described above is of active type in that the needle 38 cooperates with an electromagnet.
- the valve may be of the passive type, the electromagnet being replaced by a simple spring permanently urging the needle towards the seat, the valve opening as a function of the fuel pressure in the ramp and the stiffness spring.
- the electromagnet is energized so that the core 44 is attracted to the coil 34 and the needle 38 closes the outlet orifice 24 while bearing against the seat 26.
- the needle supports on the ball against the seat.
- the electromagnet stops its action on the needle 38 which slides in the bore away from the seat 26.
- the fuel can then leave the high pressure channel 14 passing successively through the outlet 24, the cylindrical chamber 48 the outlet channel 52 and the discharge pipe 54.
- the coil 34 is fed again and the needle 38 closes the outlet 24.
- the compression spring tare defining the pressure threshold from which the fuel pushes the needle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
- Safety Valves (AREA)
- Lift Valve (AREA)
Description
La présente invention est relative une vanne limitant la pression du carburant dans la rampe commune d'un système d'injection de carburant.The present invention relates to a valve limiting the fuel pressure in the common rail of a fuel injection system.
Les systèmes d'injection de carburant à rampe commune sont pourvus d'une vanne haute pression agencée en bout de rampe. La vanne normalement fermée est prévue pour s'ouvrir lorsque la pression dans la rampe excède un seuil prédéterminé.The common rail fuel injection systems are provided with a high pressure valve arranged at the end of ramp. The normally closed valve is intended to open when the pressure in the ramp exceeds a predetermined threshold.
De la demande
La présente invention vise à résoudre ces problèmes en proposant un agencement d'une vanne haute pression à une extrémité de la rampe commune d'un système d'injection de carburant tel que défini dans la revendication 1. Le canal haute pression de la rampe débouche à ladite extrémité de la rampe et la vanne a un corps dans lequel un membre obturateur, mobile selon un axe principal est prévu pour coopérer avec un siège entourant un orifice de sortie de sorte à fermer ledit orifice ou à l'ouvrir dès lors que la pression du carburant dans la rampe dépasse un seuil prédéterminé. Le carburant est alors évacué vers un canal de sortie.The present invention aims to solve these problems by proposing an arrangement of a high pressure valve at one end of the common rail of a fuel injection system as defined in claim 1. The high pressure channel of the ramp opens at said end of the ramp and the valve has a body in which a shutter member, movable along a main axis, is provided to cooperate with a seat surrounding an outlet orifice so as to close said opening or to open it when the fuel pressure in the boom exceeds a predetermined threshold. The fuel is then evacuated to an outlet channel.
L'agencement comprend de plus un bouchon restricteur agencé à l'extrémité de la rampe. L'orifice de sortie qui restreint la section du canal haute pression et le siège de vanne sont tous deux pourvus dans le bouchon restricteur. De plus, le canal de sortie est intégralement formé dans le corps de vanne sans avoir de partie commune avec la rampe.The arrangement further comprises a restrictor plug arranged at the end of the ramp. The outlet orifice which restricts the section of the high pressure channel and the valve seat are both provided in the restrictor plug. In addition, the outlet channel is integrally formed in the valve body without having a common part with the ramp.
La vanne comprend de plus une chambre pourvue dans le corps et agencée de sorte à recevoir le carburant sortant de l'orifice de sortie, le canal de sortie s'étendant depuis ladite chambre et traversant le corps de la vanne. Plus particulièrement, le canal de sortie s'étend radialement au travers du corps de vanne.The valve further comprises a chamber provided in the body and arranged to receive fuel exiting the outlet port, the outlet channel extending from said chamber and passing through the valve body. More particularly, the outlet channel extends radially through the valve body.
Par ailleurs, la vanne est de type actif, le membre obturateur, coopérant avec un actuateur tel un électroaimant.In addition, the valve is of the active type, the shutter member cooperating with an actuator such as an electromagnet.
Plus spécifiquement, le membre obturateur est une aiguille dont une extrémité pointue est prévue pour coopérer avec le siège. Alternativement le membre obturateur peut comprendre un poussoir agissant sur une bille prévue pour coopérer avec le siège.More specifically, the shutter member is a needle with a pointed end is provided to cooperate with the seat. Alternatively the shutter member may comprise a pusher acting on a ball provided to cooperate with the seat.
De plus, le corps de vanne est pourvu de moyen de fixation permettant de solidariser la vanne à la rampe. De manière particulière, la vanne est clipsée en bout de rampe et ainsi, la vanne peut être tournée relativement à la rampe de sorte à ajuster son orientation angulaire.In addition, the valve body is provided with fixing means for securing the valve to the ramp. In particular, the valve is clipped at the end of the ramp and thus, the valve can be rotated relative to the ramp so as to adjust its angular orientation.
L'invention est également relative à une vanne haute pression prévue pour être agencée en bout de la rampe commune d'un système d'injection de carburant selon l'une quelconque des revendications précédentes.The invention also relates to a high pressure valve designed to be arranged at the end of the common rail of a fuel injection system according to any one of the preceding claims.
D'autres caractéristiques, buts et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit, et en regard de la figure annexée donnée à titre d'exemple non limitatif et qui est une coupe axiale d'une vanne réalisée selon l'invention.Other features, objects and advantages of the invention will appear on reading the detailed description which follows, and with reference to the appended figure given by way of non-limiting example and which is an axial section of a valve made according to the invention.
Un premier mode de réalisation non limitatif de l'agencement 60 d'une vanne 10 en bout de la rampe 12 commune d'un système d'injection de carburant est maintenant décrit en référence à la
La rampe 12 s'étend selon un axe principal A et le canal haute pression 14, qui s'étend axialement dans la rampe 12, débouche à une extrémité 16 de la rampe 12 dans un lamage 18 formant avec le canal 14 une surface radiale 20. Un bouchon restricteur 22 de forme cylindrique tubulaire est agencé dans le lamage 18, et est en butée contre la surface radiale 20. Ainsi agencé le bouchon restricteur 22 affleure avec l'extrémité 16 de la rampe. Le diamètre extérieur du bouchon restricteur est ajusté serré à celui du lamage 18 de sorte que le bouchon restricteur 22 est assemblé et maintenu en place par pressage. Le bouchon restricteur 22 est pourvu d'un orifice de sortie 24 s'étendant axialement A et limitant la section du canal 14, l'orifice de sortie 24 débouchant en s'élargissant en tronc de cône et formant un siège 26. Alternativement, le bouchon restricteur peut être fixé à la rampe par d'autres moyens que le montage serré. Il peut notamment être vissé dans le lamage 18. Il peut de plus être collé en position.The
A l'extrémité de la rampe 12 est agencée la vanne 10 dont le corps 30 est clipsé en bout de rampe 12. Le clipsage du corps 30 de vanne sur la rampe 12 requiert des surfaces complémentaires qui seront décrites plus avant et qui sont par ailleurs détaillées dans la demande
Le corps 30 de vanne est globalement cylindrique, réalisé en acier magnétique et constitue la carcasse d'un électroaimant 32 dont la bobine 34 est axialement agencée dans le corps 30. Le corps 30 est de plus pourvu d'un alésage 36 axial et débouchant dans lequel est agencée coulissante une aiguille 38 dont une extrémité pointue 40 coopère avec le siège 26 et, l'autre extrémité 42 distante est solidaire d'un noyau magnétique 44 plat en forme de disque couvrant la bobine 34. Dans le mode de réalisation représenté l'aiguille 38 agit en tant que poussoir sur une bille 46 qui elle coopère avec le siège 26. Par ailleurs d'autres structures d'électroaimant peuvent être utilisées, notamment le montage classique dans lequel le noyau est axialement agencé au centre de la bobine.The
De plus, une chambre cylindrique 48 axiale est réalisée dans corps 30 et fait face au siège 26. L'alésage 36 débouche dans la chambre 48 et l'aiguille 38 s'étend au centre de ladite chambre 48. A l'autre extrémité, l'alésage 36 débouche dans un autre lamage axial 50 de sorte que la partie centrale de l'alésage qui guide axialement l'aiguille 38 est réduite. Dans cet autre alésage 50 peut être agencé un ressort, non représenté, comprimé entre le fond de l'alésage 50 et le noyau 44 de sorte à solliciter en permanence l'aiguille 38 vers la position ouverte.In addition, an axial
Tel que cela est visible sur la figure, le canal haute pression 14, le bouchon restricteur 22, l'orifice de sortie 24 l'aiguille 38, l'alésage 36, la chambre cylindrique 48 et ledit autre lamage 50 sont coaxiaux A. De plus, un canal de sortie 52 s'étend radialement depuis la chambre cylindrique 48 et traverse le corps 30 où il est poursuivi par un tuyau d'évacuation 54. Tel que cela est visible sur la figure, la chambre 48 est entièrement formée dans le corps 30 aussi, le canal de sortie 52 s'étend-il entièrement dans le corps 30 sans avoir de partie commune avec la rampe 12. Le corps 30 de vanne est de plus recouvert d'un couvercle en cloche 56 fixé au corps 30 et enfermant le noyau magnétique 44 de manière étanche grâce à un premier joint torique.As can be seen in the figure, the
Les surfaces de clipsage sont maintenant décrites. Le corps 30 est agencé en bout de rampe 12 dans un engagement mâle, pour la rampe 12, femelle pour la vanne 10. Selon l'orientation de haut en bas de la figure, et sans que cela limite l'invention, le corps 30 et la rampe 12 sont engagés selon des surfaces cylindriques de révolution complémentaires. L'étanchéité entre la vanne et la rampe est assurée par un autre joint torique. Le corps 30 est ensuite pourvu d'une gorge dans laquelle s'agence une protubérance annulaire de la rampe. La protubérance et la gorge sont en contact élastique selon une surface conique dont le sommet est dur l'axe principal A et situé du côté de la rampe. Pour ainsi s'agencer le corps s'est déformé en s'élargissant élastiquement de sorte que la protubérance puisse s'engager dans la gorge. Lorsque l'engagement est réalisé le corps reprend partiellement sa forme tout en conservant une déformation élastique résiduelle qui génère sur le corps une force axiale dirigée vers la rampe et qui plaque la vanne contre l'extrémité de la rampe. La mise en place par déformation élastique peut être facilitée en réalisant dans le corps des découpes formant créneaux et merlons de sorte à former des secteurs angulaires se déformant plus facilement qu'un cylindre continu. Une fois mise en place, la vanne est maintenue axialement en appui contre l'extrémité 16 de la rampe et, également radialement grâce aux surfaces cylindriques. La vanne peut de plus être tournée par rapport à la rampe dans le but d'ajuster l'orientation angulaire du tuyau d'évacuation 54.Clipping surfaces are now described. The
La vanne 10 décrite ci-dessus est de type actif en cela que l'aiguille 38 coopère avec un électroaimant. Dans une alternative non représentée la vanne peut être de type passif l'électroaimant étant remplacé par simple un ressort sollicitant en permanence l'aiguille vers le siège, la vanne s'ouvrant en fonction de la pression du carburant dans la rampe et de la raideur du ressort.The
Le fonctionnement de la vanne est maintenant brièvement décrit. L'électroaimant est alimenté de sorte que le noyau 44 est attiré vers la bobine 34 et que l'aiguille 38 obture l'orifice de sortie 24 en étant en appui contre le siège 26. Dans le mode représenté sur la figure l'aiguille appuie sur la bille contre le siège. Lorsque la pression du carburant dans le canal haute pression 14 excède un seuil prédéterminé l'électroaimant cesse son action sur l'aiguille 38 qui coulisse dans l'alésage en s'éloignant du siège 26. Le carburant peut alors sortir du canal haute pression 14 en passant successivement par l'orifice de sortie 24, la chambre cylindrique 48 le canal de sortie 52 et le tuyau d'évacuation 54. Lorsque la pression dans le canal redescend sous le seuil la bobine 34 est à nouveau alimentée et l'aiguille 38 referme l'orifice de sortie 24.The operation of the valve is now briefly described. The electromagnet is energized so that the
Dans le cas d'une vanne passive le fonctionnement est similaire, la tare du ressort de compression définissant le seuil de pression à partir duquel le carburant repousse l'aiguille.In the case of a passive valve the operation is similar, the compression spring tare defining the pressure threshold from which the fuel pushes the needle.
Claims (10)
- Arrangement (60) of a high-pressure valve (10) at one extremity of the common rail (12) of a fuel injection system, the high-pressure channel (14) of the rail opening out at said extremity of the rail (12), the valve (10) having a body (30) that contains a blocking member (38, 46) movable along a main axis (A) intended to cooperate with a seat (26) surrounding an output orifice (24) so as to close said orifice (24) or to open same when the pressure of the fuel in the rail (12) exceeds a predetermined threshold, in which case the fuel is discharged towards an output channel (52),
the arrangement (60) also including a throttle stopper (22) arranged at the extremity of the rail (12), the output orifice (24) restricting the section of the high-pressure channel (14) and the valve seat (26) being provided in the throttle stopper (22), the output channel (52) being fully formed inside the valve body (30) without sharing any portion common with the rail (12), characterized in that the said output channel (52) is intended to be extended by a discharge pipe (54) the angular orientation of which can be adjusted by turning the valve. - Arrangement (60) according to the preceding claim, wherein the valve (10) also includes a chamber (48) provided inside the body and (30) arranged so as to receive the fuel discharged from the output orifice (52), the output channel (52) extending from said chamber (48) and passing through the body (30) of the valve.
- Arrangement (60) according to Claim 2, wherein the output channel (52) extends radially through the valve body (30).
- Arrangement (60) according to any one of the preceding claims, characterized in that the valve (10) is an active valve, the blocking member (38, 46) cooperating with an actuator (32), such as an electromagnet.
- Arrangement (60) according to any one of the preceding claims, wherein the blocking member is a needle (38) with a pointed extremity (40) provided to cooperate with the seat (26).
- Arrangement (60) according to any one of the preceding claims, wherein the blocking member (38, 46) includes a push rod (38) acting on a ball (46) provided to cooperate with the seat (26).
- Arrangement (60) according to any one of the preceding claims, characterized in that the valve body (30) is provided with attachment means enabling the valve (10) to be rigidly connected to the rail (12).
- Arrangement (60) according to Claim 7, wherein the valve (10) is clipped to the end of the rail (12).
- Arrangement (60) according to Claim 8, wherein the valve (10) can be turned in relation to the rail (12) so as to adjust the angular orientation of same.
- High-pressure valve (10) provided to be positioned at the end of the common rail (12) of a fuel injection system according to an arrangement corresponding to any one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1357585A FR3009344B1 (en) | 2013-07-31 | 2013-07-31 | INTEGRATED ARRANGEMENT OF A HIGH PRESSURE VALVE AND AN INJECTION RAMP |
PCT/EP2014/065628 WO2015014654A1 (en) | 2013-07-31 | 2014-07-21 | Integrated arrangement of a high-pressure valve and an injection ramp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3027884A1 EP3027884A1 (en) | 2016-06-08 |
EP3027884B1 true EP3027884B1 (en) | 2019-10-09 |
Family
ID=49911611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14741873.5A Active EP3027884B1 (en) | 2013-07-31 | 2014-07-21 | Integrated arrangement of a high-pressure valve and an injection ramp |
Country Status (7)
Country | Link |
---|---|
US (1) | US10018170B2 (en) |
EP (1) | EP3027884B1 (en) |
JP (1) | JP2016532046A (en) |
KR (1) | KR102164183B1 (en) |
CN (1) | CN105518287B (en) |
FR (1) | FR3009344B1 (en) |
WO (1) | WO2015014654A1 (en) |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3904479A1 (en) * | 1989-02-15 | 1990-08-16 | Bosch Gmbh Robert | CONNECTING ELEMENT |
US5076499A (en) * | 1990-10-26 | 1991-12-31 | Siemens Automotive L.P. | Fuel injector valve having a sphere for the valve element |
US5549274A (en) * | 1994-04-20 | 1996-08-27 | Cummins Engine Company, Inc. | Ball guide for an electronically actuated control valve |
DE19810241C2 (en) * | 1998-03-10 | 2001-07-05 | Bosch Gmbh Robert | Electromagnetic directional control valve |
KR20020058160A (en) * | 2000-12-29 | 2002-07-12 | 박상록 | Pressure control valve of compressible fuel injection system |
DE10125944A1 (en) * | 2001-05-29 | 2002-12-05 | Bosch Gmbh Robert | Fuel injection system for internal combustion engines, in particular diesel engines |
JP2003222257A (en) * | 2002-01-25 | 2003-08-08 | Denso Corp | Mounting structure of solenoid valve and its mounting method |
DE102007013525A1 (en) * | 2007-03-21 | 2008-09-25 | Robert Bosch Gmbh | Pressure control valve |
DE102007053800A1 (en) * | 2007-11-12 | 2009-05-14 | Robert Bosch Gmbh | Fuel system for internal-combustion engine, has fuel pump and adjustable throttle device for adjusting supply for fuel pump, where cylinder section is retained at housing section of actuation equipment with angle play or radial play |
JP2010053996A (en) * | 2008-08-29 | 2010-03-11 | Bosch Corp | Pressure control valve |
DE102010043092A1 (en) * | 2010-10-29 | 2012-05-03 | Robert Bosch Gmbh | Pressure control valve |
JP5780581B2 (en) * | 2010-12-28 | 2015-09-16 | ボッシュ株式会社 | Pressure control valve for common rail fuel injection control system |
FR2973076A1 (en) * | 2011-03-25 | 2012-09-28 | Bosch Gmbh Robert | PRESSURE REGULATOR, DIESEL INJECTION DEVICE COMPRISING SUCH A REGULATOR, DIESEL ENGINE COMPRISING SUCH AN INJECTION DEVICE AND VEHICLE COMPRISING SUCH AN ENGINE |
CN102777300B (en) | 2011-05-12 | 2015-04-01 | 株式会社电装 | Valve device and high pressure pump using the same |
-
2013
- 2013-07-31 FR FR1357585A patent/FR3009344B1/en not_active Expired - Fee Related
-
2014
- 2014-07-21 EP EP14741873.5A patent/EP3027884B1/en active Active
- 2014-07-21 WO PCT/EP2014/065628 patent/WO2015014654A1/en active Application Filing
- 2014-07-21 KR KR1020167000319A patent/KR102164183B1/en active IP Right Grant
- 2014-07-21 CN CN201480043083.0A patent/CN105518287B/en active Active
- 2014-07-21 JP JP2016530425A patent/JP2016532046A/en active Pending
- 2014-07-21 US US14/908,607 patent/US10018170B2/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
KR102164183B1 (en) | 2020-10-13 |
US10018170B2 (en) | 2018-07-10 |
CN105518287A (en) | 2016-04-20 |
FR3009344B1 (en) | 2015-08-07 |
US20160273503A1 (en) | 2016-09-22 |
KR20160034281A (en) | 2016-03-29 |
CN105518287B (en) | 2019-01-08 |
WO2015014654A1 (en) | 2015-02-05 |
FR3009344A1 (en) | 2015-02-06 |
EP3027884A1 (en) | 2016-06-08 |
JP2016532046A (en) | 2016-10-13 |
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