WO2016170268A1 - Blowdown electrovalve for vapour venting device - Google Patents
Blowdown electrovalve for vapour venting device Download PDFInfo
- Publication number
- WO2016170268A1 WO2016170268A1 PCT/FR2016/050920 FR2016050920W WO2016170268A1 WO 2016170268 A1 WO2016170268 A1 WO 2016170268A1 FR 2016050920 W FR2016050920 W FR 2016050920W WO 2016170268 A1 WO2016170268 A1 WO 2016170268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- shutter member
- armature
- solenoid valve
- passage
- 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.)
- Ceased
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0651—One-way valve the fluid passing through the solenoid coil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03519—Valve arrangements in the vent line
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
- B60K2015/03302—Electromagnetic valves
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M2025/0845—Electromagnetic valves
Definitions
- the invention relates to a solenoid valve, such as in particular a purge solenoid valve for evacuation of vapors, and to a motor and a motor vehicle comprising such a solenoid valve.
- Such a solenoid valve comprises:
- a housing provided with a fluid inlet orifice and a fluid outlet orifice
- a magnetic material armature located facing one end of a magnetic core of said winding and movable along an axis of said core between a first open position and a second closed position of said outlet orifice;
- a shutter member integral with displacement of said movable armature, said shutter member being spaced apart or in abutment against said seat when the armature is in its first or second position, respectively,
- a first fluid flow circuit bypassing said core and communicating in the first position of the armature the inlet port with the outlet through a passage of the seat.
- solenoid valves may find a preferred, although not exclusive, application in gasoline vapor recovery devices that accumulate in fuel tanks, above the liquid phase, intended to accompany a spark ignition engine. controlled, particularly in motor vehicles, to prevent the discharge of said vapors directly into the atmosphere.
- the flow of steam bypasses the bobbin and flows into the opening defined between the seat and the shutter member.
- the coil is supplied with a chopped current current which can vary from 0 to 100%, so as to vary the distance between the shutter member and the seat. This has the effect of determining the flow rate of the valve for a given value of the differential pressure prevailing on both sides of the valve.
- the flow is thus proportional to the outer perimeter of the passage of the seat and to the distance separating the seat of the shutter member in the open position of the armature.
- the flow rate is a function of the surface, separating the seat from the shutter member, through which the flow of vapors is allowed to flow in the open position of the armature.
- a solenoid valve as mentioned in the preamble is characterized, being arranged according to the invention, in that it comprises a second fluid flow circuit comprising a tubular passage formed inside the core and communicating with one end with the inlet port and at the other end with an opening through the frame and the shutter member, and in that the passage of the seat has an at least partially annular shape which is in fluid communication with the opening the armature and the shutter member when the armature is in its first position.
- the fluid in the open position of the frame, the fluid can flow both in the first circuit by the outer perimeter of the passage of the seat and in the second circuit by the inner perimeter of the passage of the seat. It is understood that it is thus possible to circulate a higher flow rate to the prior art since the fluid can flow through two circuits and no longer only by the bypass circuit.
- the integration of an at least partially annular passage makes it possible to configure the passage of the seat so that its surface measured in a direction perpendicular to its axis is equal to the surface of the circular orifice of the prior art, which avoids to increase the pressure difference applied to the shutter member.
- the invention may also allow, as a function of the desired flow rate increase over the prior art, to reduce the area of the seat opening. Therefore, the application surface of the pressure difference on the shutter member can be reduced and the impact noise of the shutter member on the seat and operating noise of the solenoid valve are also reduced.
- the seat comprises a single annular passage. This annular passage preferably extends over almost 360 °.
- the seat comprises a plurality of angular sector-shaped passages and solid portions alternately arranged around the axis of the seat.
- the circumferential ends of the solid parts comprise convex rounded edges, which may have a constant radius of curvature.
- the seat may comprise a cylindrical wall internally engaged in sealing in the outlet orifice and a central portion whose outer periphery internally delimits the annular passage and is intended to close the opening of the shutter member.
- the central portion is advantageously mechanically connected to the cylindrical wall.
- the invention also relates to a motor vehicle, comprising a motor incorporating a solenoid valve as described above.
- the invention also relates to a motor vehicle, characterized in that it comprises a motor of the aforementioned type.
- FIG. 1 and Figure 2 are schematic sectional views of a solenoid valve according to the prior art in an open position and a closed position, respectively;
- FIG. 3 and Figure 4 are schematic sectional views of a solenoid valve according to the invention in an open position and in a closed position, respectively;
- FIG 5 is a schematic view along a section plane passing through the opening of a seat of a solenoid valve according to a variant of the invention.
- FIG. 1 and FIG. 2 there is shown a prior art bleed solenoid valve 10 for evacuation of vapors in an open position and a closed position, respectively.
- Such a solenoid valve comprises a housing 12 for example made of rigid plastic material, formed of a lower housing body 14 and an upper housing body or cover 16.
- the lower housing body 14 forms a vessel whose bottom comprises a inlet port 18 extended by an inlet conduit 20 for connection to a vapor inlet duct.
- the upper case body 16 is provided with a vapor outlet port 22 extended by an outlet conduit 24 for connection to a vapor vent.
- a circuit of magnetic material 26 is disposed in the lower casing body 14 and surrounds a solenoid bobbin 28.
- the bobbin 28 is secured to the housing by means of a mechanical connection, not shown, comprising for example one or more flanges and comprises a tubular magnetic core 30 of general rod shape.
- An electric winding 32 is fixedly mounted around the core 30.
- a metal armature 34 formed of a metal plate of magnetic material is located facing the upper end of the magnetic core 30 and carries a shutter member 36 made of a material adapted to cooperate sealingly with a seat 38 of the solenoid valve. 10 which is formed by the inner end of the outlet duct 22.
- the shutter member 36 is constituted by a layer of a sealing material, such as elastomer, deposited on the upper face of the metal frame 34.
- the metal frame 34 can thus take a first open position (FIG. 1) of the flow of vapors in the orifice of outlet 22 and a second closed position (FIG. 2) of said vapor flow.
- FIG. 1 first open position
- FIG. 2 second closed position
- the shutter member 36 is constrained bearing on the seat 38 by an elastic member such as a spring (not shown).
- a magnetic field is applied, that against the force of the spring and moves the metal armature 34 in its first open position which moves the shutter member 36 away from the seat 38.
- FIG. 1 and FIG. 2 comprise a disc 40 which represents the application surface of the pressure difference on the shutter member 36. This surface 40 corresponds to the section of the outlet orifice 22.
- Increasing the diameter of the outlet orifice 22 to increase the flow rate is undesirable since it would lead to increase the surface area of the differential pressure application disc 40 on the shutter member 36. This inevitably leads to an increase noise and a decrease in responsiveness of the solenoid valve as indicated in more detail previously.
- the solenoid valve according to the invention 42 comprises a seat 44 which has a substantially cylindrical wall 46 sealingly engaged in the outlet orifice 48 by means of a seal 50 interposed between the cylindrical wall 46 and a wall of the conduit 52 of the outlet orifice 48.
- the cylindrical wall 46 is mechanically connected to a central portion 54 delimiting with the cylindrical wall 46 a substantially annular opening 55.
- the outlet conduit 52 comprises a first portion 56 upstream of a diameter greater than the diameter of a second portion 58.
- the solenoid valve according to the invention 42 comprises a second fluid flow circuit formed by a tubular passage 60 of the core 30.
- This tubular passage 60 extends along the axis 62 of the core and opens at its inner end to with respect to the inlet orifice 18 and at its opposite external end vis-à-vis an opening 64 of the metal frame 66 and the shutter member 68 ( Figures 3 and 4). Note that the central portion 54 of the seat 44 is arranged vis-à-vis the axial opening 64 of the shutter member 68.
- the metal armature 66 when the metal armature 66 is in its first open position the vapors circulate through the first circuit bypassing the coil 28 (arrows A) and by the second flow circuit in the magnetic core 30 (arrows B). The vapors can thus flow through the entire first annular zone 70 defined axially between the cylindrical wall 46 and the shutter member 68 and through the entire second annular zone 72 defined axially between the radially outer peripheral edge of the portion central 54 and the shutter member 68.
- the invention thus makes it possible to circulate a greater flow of vapors without having to increase the fluid passage section of the seat 44 as can be seen by visual comparison of FIGS. 1 and 3, where it can be seen that section 55 of FIG. the annular opening of the seat 44 according to the invention ( Figure 3) is substantially identical to the section 40 of the circular opening of the outlet orifice 22 according to the prior art. In this way the same force, resulting from the pressure difference applied to the surface, is applied to the shutter member 68 with the prior art, which makes it possible to take advantage of the increase in the flow of vapors without have the disadvantages described above.
- the seat 44 comprises a single annular passage 55.
- the seat 71 may further comprise a plurality of passages 74 in the form of angular sector alternately arranged with solid portions 76 ( Figure 5).
- Annular sectors 74 and solid portions are advantageously regularly distributed around the axis 80 of the seat so as to ensure a uniform flow of gas around said axis.
- Each solid portion 76 may have rounded convex edges 78 which may have, for example, a constant radius of curvature.
- the seat can, for example, be made of rigid plastic.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
ELECTROVANNE DE PURGE POUR DISPOSITIF D'EVACUATION DE PURGE SOLENOID VALVE FOR DRAIN DEVICE
VAPEURS VAPOR
L'invention se rapporte à une électrovanne, tel qu'en particulier une électrovanne de purge pour l'évacuation de vapeurs, ainsi qu'à un moteur et un véhicule automobile comprenant une telle électrovanne. The invention relates to a solenoid valve, such as in particular a purge solenoid valve for evacuation of vapors, and to a motor and a motor vehicle comprising such a solenoid valve.
Une telle électrovanne comprend : Such a solenoid valve comprises:
- un boîtier muni d'un orifice d'entrée de fluide et d'un orifice de sortie de fluide, a housing provided with a fluid inlet orifice and a fluid outlet orifice,
- un bobinot d'électroaimant monté dans ledit boîtier, an electromagnet winding mounted in said housing,
- une armature en matériau magnétique située en regard d'une extrémité d'un noyau magnétique dudit bobinot et déplaçable selon un axe dudit noyau entre une première position d'ouverture et une seconde position de fermeture dudit orifice de sortie, a magnetic material armature located facing one end of a magnetic core of said winding and movable along an axis of said core between a first open position and a second closed position of said outlet orifice;
- un siège d'un organe obturateur solidaire de l'orifice de sortie, a seat of a shutter member secured to the outlet orifice,
- un organe obturateur solidaire à déplacement de ladite armature mobile, ledit organe obturateur étant écarté ou en appui contre ledit siège lorsque l'armature est dans sa première ou seconde position, respectivement, a shutter member integral with displacement of said movable armature, said shutter member being spaced apart or in abutment against said seat when the armature is in its first or second position, respectively,
- un premier circuit d'écoulement de fluide contournant ledit noyau et faisant communiquer dans la première position de l'armature l'orifice d'entrée avec l'orifice de sortie au travers d'un passage du siège. - A first fluid flow circuit bypassing said core and communicating in the first position of the armature the inlet port with the outlet through a passage of the seat.
De telles électrovannes peuvent trouver une application préférée, bien que non exclusive, dans les dispositifs de récupération des vapeurs d'essence qui s'accumulent dans les réservoirs d'essence, au- dessus de la phase liquide, destinés à accompagner un moteur à allumage commandé, en particulier dans les véhicules automobiles, afin d'éviter le rejet desdites vapeurs directement dans l'atmosphère. Such solenoid valves may find a preferred, although not exclusive, application in gasoline vapor recovery devices that accumulate in fuel tanks, above the liquid phase, intended to accompany a spark ignition engine. controlled, particularly in motor vehicles, to prevent the discharge of said vapors directly into the atmosphere.
Lorsque l'armature est dans sa position d'ouverture, le débit de vapeur contourne le bobinot et s'écoule dans l'ouverture délimitée entre le siège et l'organe obturateur. La bobine est alimentée en courant haché de rapport cyclique pouvant varier de 0 à 100%, de manière à faire varier la distance entre l'organe obturateur et le siège. Ceci a pour effet de déterminer le débit de la vanne pour une valeur donnée de la pression différentielle régnant de part et d'autre de la vanne. Le débit est ainsi proportionnel au périmètre externe du passage du siège et à la distance séparant le siège de l'organe obturateur en position d'ouverture de l'armature. Dit autrement, le débit est fonction de la surface, séparant le siège de l'organe obturateur, au travers de laquelle le débit de vapeurs est autorisé à circuler en position d'ouverture de l'armature. When the frame is in its open position, the flow of steam bypasses the bobbin and flows into the opening defined between the seat and the shutter member. The coil is supplied with a chopped current current which can vary from 0 to 100%, so as to vary the distance between the shutter member and the seat. This has the effect of determining the flow rate of the valve for a given value of the differential pressure prevailing on both sides of the valve. The flow is thus proportional to the outer perimeter of the passage of the seat and to the distance separating the seat of the shutter member in the open position of the armature. In other words, the flow rate is a function of the surface, separating the seat from the shutter member, through which the flow of vapors is allowed to flow in the open position of the armature.
Ainsi, lorsque l'on souhaite augmenter le débit circulant au travers du siège en position d'ouverture de l'armature, il est nécessaire d'augmenter la surface de circulation de vapeurs. Lorsque le siège à une ouverture de forme par exemple circulaire, cela peut être réalisé en augmentant le diamètre de l'ouverture du siège. Toutefois, cela conduit à augmenter la surface de l'organe obturateur sur laquelle s'applique la différence de pression ce qui conduit aux difficultés suivantes : Thus, when it is desired to increase the flow rate through the seat in the open position of the armature, it is necessary to increase the vapor circulation area. When the seat has a shape opening for example circular, this can be achieved by increasing the diameter of the opening of the seat. However, this leads to increasing the surface of the shutter member to which the pressure difference applies, which leads to the following difficulties:
- il est nécessaire d'augmenter la puissance magnétique de l'électroaimant pour contrer la force hydraulique additionnelle, ce qui conduit à une augmentation du bruit de fonctionnement de l'électrovanne, - It is necessary to increase the magnetic power of the electromagnet to counter the additional hydraulic force, which leads to an increase in the operating noise of the solenoid valve,
- la force hydraulique additionnelle conduit à une augmentation du bruit de fermeture de la vanne, c'est-à-dire consécutif au choc de l'organe obturateur sur le siège, the additional hydraulic force leads to an increase in the closing noise of the valve, that is to say following the impact of the shutter member on the seat,
- le temps de réponse de l'électrovanne est augmenté du fait de l'augmentation de la force hydraulique additionnelle. - The response time of the solenoid valve is increased due to the increase of the additional hydraulic force.
Ainsi, ce type de solution ne s'avère pas optimal et n'est pas privilégié par les constructeurs automobiles qui demandent que tous les dispositifs d'un véhicule soient individuellement rendus plus silencieux afin que chaque dispositif contribue à l'obtention d'un niveau sonore aussi faible que possible dans l'habitacle du véhicule. Il est donc requis de trouver une conception d'électrovanne autorisant une circulation d'un débit plus important des vapeurs sans pour autant augmenter la surface d'application de la différence de pression sur l'organe obturateur pour éviter les inconvénients précités. Thus, this type of solution is not optimal and is not preferred by car manufacturers who require that all the devices of a vehicle are individually made quieter so that each device contributes to obtaining a level sound as low as possible in the passenger compartment of the vehicle. It is therefore necessary to find a solenoid valve design allowing greater vapor flow rate of the vapors without increasing the application surface of the pressure difference on the shutter member to avoid the aforementioned drawbacks.
A cette fin, une électrovanne telle que mentionnée au préambule se caractérise, étant agencée conformément à l'invention, en ce qu'elle comprend un second circuit d'écoulement de fluide comportant un passage tubulaire formé à l'intérieur du noyau et communiquant à une extrémité avec l'orifice d'entrée et à l'autre extrémité avec une ouverture traversant l'armature et l'organe obturateur, et en ce que le passage du siège a une forme au moins partiellement annulaire qui est en communication fluidique avec l'ouverture de l'armature et de l'organe obturateur lorsque l'armature est dans sa première position. To this end, a solenoid valve as mentioned in the preamble is characterized, being arranged according to the invention, in that it comprises a second fluid flow circuit comprising a tubular passage formed inside the core and communicating with one end with the inlet port and at the other end with an opening through the frame and the shutter member, and in that the passage of the seat has an at least partially annular shape which is in fluid communication with the opening the armature and the shutter member when the armature is in its first position.
Grâce à cet agencement, en position d'ouverture de l'armature, le fluide peut circuler à la fois dans le premier circuit par le périmètre extérieur du passage du siège et dans le second circuit par le périmètre intérieur du passage du siège. On comprend qu'il est ainsi possible de faire circuler un débit supérieur à l'art antérieur puisque le fluide peut circuler par deux circuits et non plus uniquement par le circuit de contournement. L'intégration d'un passage au moins partiellement annulaire permet de configurer le passage du siège de sorte que sa surface mesurée dans une direction perpendiculaire à son axe soit égale à la surface de l'orifice circulaire de l'art antérieur, ce qui évite d'augmenter la différence de pression appliquée sur l'organe obturateur. With this arrangement, in the open position of the frame, the fluid can flow both in the first circuit by the outer perimeter of the passage of the seat and in the second circuit by the inner perimeter of the passage of the seat. It is understood that it is thus possible to circulate a higher flow rate to the prior art since the fluid can flow through two circuits and no longer only by the bypass circuit. The integration of an at least partially annular passage makes it possible to configure the passage of the seat so that its surface measured in a direction perpendicular to its axis is equal to the surface of the circular orifice of the prior art, which avoids to increase the pressure difference applied to the shutter member.
De plus, l'invention peut également permettre, en fonction de l'augmentation de débit souhaitée par rapport à l'art antérieur, de réduire la surface de l'ouverture du siège. Dès lors, la surface d'application de la différence de pression sur l'organe obturateur peut être réduite et les bruits d'impact de l'organe obturateur sur le siège et les bruits de fonctionnement de l'électrovanne sont également réduits. Selon une autre caractéristique de l'invention, le siège comprend un seul passage annulaire. Ce passage annulaire s'étend de préférence sur quasi 360°. In addition, the invention may also allow, as a function of the desired flow rate increase over the prior art, to reduce the area of the seat opening. Therefore, the application surface of the pressure difference on the shutter member can be reduced and the impact noise of the shutter member on the seat and operating noise of the solenoid valve are also reduced. According to another characteristic of the invention, the seat comprises a single annular passage. This annular passage preferably extends over almost 360 °.
Dans une autre réalisation, le siège comprend une pluralité de passages en forme de secteur angulaire et de parties pleines disposés en alternance autour de l'axe du siège. In another embodiment, the seat comprises a plurality of angular sector-shaped passages and solid portions alternately arranged around the axis of the seat.
Selon une autre caractéristique de l'invention, les extrémités circonférentielles des parties pleines comprennent des bords arrondis convexes, lesquels peuvent avoir un rayon de courbure constant. According to another characteristic of the invention, the circumferential ends of the solid parts comprise convex rounded edges, which may have a constant radius of curvature.
Le siège peut comprendre une paroi cylindrique engagée intérieurement à étanchéité dans l'orifice de sortie et une portion centrale dont le pourtour externe délimite intérieurement le passage annulaire et est destinée à obturer l'ouverture de l'organe obturateur. The seat may comprise a cylindrical wall internally engaged in sealing in the outlet orifice and a central portion whose outer periphery internally delimits the annular passage and is intended to close the opening of the shutter member.
La portion centrale est avantageusement reliée mécaniquement à la paroi cylindrique. The central portion is advantageously mechanically connected to the cylindrical wall.
L'invention concerne encore un véhicule automobile, comprenant un moteur intégrant une électrovanne comme décrite ci- dessus. The invention also relates to a motor vehicle, comprising a motor incorporating a solenoid valve as described above.
L'invention concerne également un véhicule automobile, caractérisé en ce qu'il comprend un moteur du type précité. The invention also relates to a motor vehicle, characterized in that it comprises a motor of the aforementioned type.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels : The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of non-limiting example with reference to the accompanying drawings in which:
- la figure 1 et la figure 2 sont des vues schématiques en coupe d'une électrovanne selon la technique antérieure dans une position d'ouverture et dans une position de fermeture, respectivement ; - Figure 1 and Figure 2 are schematic sectional views of a solenoid valve according to the prior art in an open position and a closed position, respectively;
- la figure 3 et la figure 4 sont des vues schématiques en coupe d'une électrovanne selon l'invention dans une position d'ouverture et dans une position de fermeture, respectivement ; - la figure 5 est une vue schématique selon un plan de coupe passant par l'ouverture d'un siège d'une électrovanne selon une variante de l'invention. - Figure 3 and Figure 4 are schematic sectional views of a solenoid valve according to the invention in an open position and in a closed position, respectively; - Figure 5 is a schematic view along a section plane passing through the opening of a seat of a solenoid valve according to a variant of the invention.
On se réfère tout d'abord à la figure 1 et à la figure 2 qui représentent une électrovanne 10 de purge pour l'évacuation de vapeurs selon la technique antérieure, dans une position d'ouverture et une position de fermeture, respectivement. Referring first to FIG. 1 and FIG. 2, there is shown a prior art bleed solenoid valve 10 for evacuation of vapors in an open position and a closed position, respectively.
Une telle électrovanne comprend un boîtier 12 par exemple réalisé en matière plastique rigide, formé d'un corps de boîtier inférieur 14 et d'un corps de boîtier supérieur ou couvercle 16. Le corps de boîtier inférieur 14 forme une cuve dont le fond comporte un orifice d'entrée 18 prolongé par un conduit d'entrée 20 destiné à être raccordé à un conduit d'admission des vapeurs. Le corps de boîtier supérieur 16 est muni d'un orifice de sortie 22 des vapeurs prolongé par un conduit de sortie 24 destiné à être raccordé à un conduit d'évacuation des vapeurs. Such a solenoid valve comprises a housing 12 for example made of rigid plastic material, formed of a lower housing body 14 and an upper housing body or cover 16. The lower housing body 14 forms a vessel whose bottom comprises a inlet port 18 extended by an inlet conduit 20 for connection to a vapor inlet duct. The upper case body 16 is provided with a vapor outlet port 22 extended by an outlet conduit 24 for connection to a vapor vent.
Un circuit en matériau magnétique 26 est disposé dans le corps de boîtier inférieur 14 et entoure un bobinot 28 d'électroaimant. Le bobinot 28 est rendu solidaire du boîtier par l'intermédiaire d'une liaison mécanique, non représentée, comprenant par exemple un ou plusieurs flasques et comprend un noyau magnétique 30 tubulaire de forme générale de tige. Un bobinage électrique 32 est monté fixe autour du noyau 30. A circuit of magnetic material 26 is disposed in the lower casing body 14 and surrounds a solenoid bobbin 28. The bobbin 28 is secured to the housing by means of a mechanical connection, not shown, comprising for example one or more flanges and comprises a tubular magnetic core 30 of general rod shape. An electric winding 32 is fixedly mounted around the core 30.
Une armature métallique 34 formée d'une plaquette métallique en matériau magnétique est située en regard de l'extrémité supérieure du noyau magnétique 30 et porte un organe obturateur 36 réalisé dans un matériau apte à coopérer de façon étanche avec un siège 38 de l'électrovanne 10 qui est formé par l'extrémité interne du conduit de sortie 22. Sur les figures 1 à 4, l'organe obturateur 36 est constitué par une couche d'un matériau d'étanchéité, tel que de l'élastomère, déposée sur la face supérieure de l'armature métallique 34. A metal armature 34 formed of a metal plate of magnetic material is located facing the upper end of the magnetic core 30 and carries a shutter member 36 made of a material adapted to cooperate sealingly with a seat 38 of the solenoid valve. 10 which is formed by the inner end of the outlet duct 22. In Figures 1 to 4, the shutter member 36 is constituted by a layer of a sealing material, such as elastomer, deposited on the upper face of the metal frame 34.
L'armature métallique 34 peut ainsi prendre une première position d'ouverture (figure 1 ) de l'écoulement de vapeurs dans l'orifice de sortie 22 et une deuxième position de fermeture (figure 2) dudit écoulement de vapeurs. En l'absence de l'application d'un champ magnétique, l'organe obturateur 36 est en contraint en appui sur le siège 38 par un organe élastique tel qu'un ressort (non représenté). Lorsqu'un champ magnétique est appliqué, celui contre la force du ressort et déplace l'armature métallique 34 dans sa première position d'ouverture ce qui éloigne l'organe obturateur 36 du siège 38. The metal frame 34 can thus take a first open position (FIG. 1) of the flow of vapors in the orifice of outlet 22 and a second closed position (FIG. 2) of said vapor flow. In the absence of the application of a magnetic field, the shutter member 36 is constrained bearing on the seat 38 by an elastic member such as a spring (not shown). When a magnetic field is applied, that against the force of the spring and moves the metal armature 34 in its first open position which moves the shutter member 36 away from the seat 38.
Comme indiqué précédemment, le débit de vapeurs au travers de l'orifice de sortie 22 est fonction de la distance séparant l'organe obturateur 36 du siège 38 lorsque l'armature est en position d'ouverture. La figure 1 et la figure 2 comprennent un disque 40 qui représente la surface d'application de la différence de pression sur l'organe obturateur 36. Cette surface 40 correspond à la section de l'orifice de sortie 22. Comme évoqué auparavant, l'augmentation du diamètre de l'orifice de sortie 22 pour augmenter le débit n'est pas souhaitable puisque cela conduirait à augmenter la surface du disque 40 d'application de la différence pression sur l'organe obturateur 36. Cela conduit inévitablement à une augmentation de bruit et à une baisse de réactivité de l'électrovanne comme indiqué plus en détail précédemment. As indicated above, the flow of vapors through the outlet orifice 22 is a function of the distance separating the shutter member 36 from the seat 38 when the armature is in the open position. FIG. 1 and FIG. 2 comprise a disc 40 which represents the application surface of the pressure difference on the shutter member 36. This surface 40 corresponds to the section of the outlet orifice 22. As mentioned previously, Increasing the diameter of the outlet orifice 22 to increase the flow rate is undesirable since it would lead to increase the surface area of the differential pressure application disc 40 on the shutter member 36. This inevitably leads to an increase noise and a decrease in responsiveness of the solenoid valve as indicated in more detail previously.
Afin de remédier à cette difficulté, il est ainsi proposé de modifier la forme de l'ouverture du siège et d'ajouter un second circuit d'écoulement de vapeurs indépendant du premier circuit contournant le bobino. To remedy this difficulty, it is thus proposed to modify the shape of the opening of the seat and to add a second vapor flow circuit independent of the first circuit bypassing the coil.
Pour cela, l'électrovanne selon l'invention 42 comprend un siège 44 qui comporte une paroi sensiblement cylindrique 46 engagée à étanchéité dans l'orifice de sortie 48 grâce à un joint d'étanchéité 50 intercalé entre la paroi cylindrique 46 et une paroi du conduit 52 de l'orifice de sortie 48. La paroi cylindrique 46 est reliée mécaniquement à une portion centrale 54 délimitant avec la paroi cylindrique 46 une ouverture sensiblement annulaire 55. On remarque que le conduit de sortie 52 comprend une première portion 56 amont d'un diamètre plus important que le diamètre d'une seconde portion 58. L'électrovanne selon l'invention 42 comprend un second circuit d'écoulement de fluide formé par un passage tubulaire 60 du noyau 30. Ce passage tubulaire 60 s'étend selon l'axe 62 du noyau et débouche à son extrémité interne en vis-à-vis de l'orifice d'entrée 18 et à son extrémité externe opposée en vis-à-vis d'une ouverture 64 de l'armature métallique 66 et de l'organe obturateur 68 (figures 3 et 4). On remarque que la portion centrale 54 du siège 44 est agencée en vis-à-vis axial de l'ouverture 64 de l'organe obturateur 68. For this, the solenoid valve according to the invention 42 comprises a seat 44 which has a substantially cylindrical wall 46 sealingly engaged in the outlet orifice 48 by means of a seal 50 interposed between the cylindrical wall 46 and a wall of the conduit 52 of the outlet orifice 48. The cylindrical wall 46 is mechanically connected to a central portion 54 delimiting with the cylindrical wall 46 a substantially annular opening 55. Note that the outlet conduit 52 comprises a first portion 56 upstream of a diameter greater than the diameter of a second portion 58. The solenoid valve according to the invention 42 comprises a second fluid flow circuit formed by a tubular passage 60 of the core 30. This tubular passage 60 extends along the axis 62 of the core and opens at its inner end to with respect to the inlet orifice 18 and at its opposite external end vis-à-vis an opening 64 of the metal frame 66 and the shutter member 68 (Figures 3 and 4). Note that the central portion 54 of the seat 44 is arranged vis-à-vis the axial opening 64 of the shutter member 68.
Ainsi, lorsque l'armature métallique 66 est dans sa première position d'ouverture les vapeurs circulent par le premier circuit de contournement du bobino 28 (flèches A) et par le second circuit d'écoulement dans le noyau magnétique 30 (flèches B). Les vapeurs peuvent ainsi s'écouler au travers de toute la première zone annulaire 70 délimitée axialement entre la paroi cylindrique 46 et l'organe obturateur 68 et au travers de toute la seconde zone annulaire 72 délimitée axialement entre le bord périphérique radialement externe de la portion centrale 54 et l'organe obturateur 68. Thus, when the metal armature 66 is in its first open position the vapors circulate through the first circuit bypassing the coil 28 (arrows A) and by the second flow circuit in the magnetic core 30 (arrows B). The vapors can thus flow through the entire first annular zone 70 defined axially between the cylindrical wall 46 and the shutter member 68 and through the entire second annular zone 72 defined axially between the radially outer peripheral edge of the portion central 54 and the shutter member 68.
L'invention permet ainsi de faire circuler un débit plus important de vapeurs sans avoir à augmenter la section de passage de fluide du siège 44 comme cela est visible par comparaison visuelle des figures 1 et 3 où l'on peut observer que la section 55 de l'ouverture annulaire du siège 44 selon l'invention (figure 3) est sensiblement identique à la section 40 de l'ouverture circulaire de l'orifice de sortie 22 selon la technique antérieure. De cette manière une même force, résultante de la différence de pression appliquée sur la surface, s'applique sur l'organe obturateur 68 qu'avec la technique antérieure, ce qui permet de tirer avantage de l'augmentation du débit de vapeurs sans en avoir les inconvénients décrits précédemment. The invention thus makes it possible to circulate a greater flow of vapors without having to increase the fluid passage section of the seat 44 as can be seen by visual comparison of FIGS. 1 and 3, where it can be seen that section 55 of FIG. the annular opening of the seat 44 according to the invention (Figure 3) is substantially identical to the section 40 of the circular opening of the outlet orifice 22 according to the prior art. In this way the same force, resulting from the pressure difference applied to the surface, is applied to the shutter member 68 with the prior art, which makes it possible to take advantage of the increase in the flow of vapors without have the disadvantages described above.
Le siège 44 comprendre un seul passage annulaire 55. Le siège 71 peut encore comprendre une pluralité de passages 74 en forme de secteur angulaire disposés en alternance avec des parties pleines 76 (figure 5). Les secteurs annulaires 74 et les parties pleines sont avantageusement régulièrement répartis autour de l'axe 80 du siège de manière à assurer une circulation uniforme du gaz autour dudit axe. Chaque partie pleine 76 peut avoir des bords 78 arrondis convexes qui peuvent avoir par exemple un rayon de courbure constant. The seat 44 comprises a single annular passage 55. The seat 71 may further comprise a plurality of passages 74 in the form of angular sector alternately arranged with solid portions 76 (Figure 5). Annular sectors 74 and solid portions are advantageously regularly distributed around the axis 80 of the seat so as to ensure a uniform flow of gas around said axis. Each solid portion 76 may have rounded convex edges 78 which may have, for example, a constant radius of curvature.
Le siège peut, par exemple, être réalisé en plastique rigide. The seat can, for example, be made of rigid plastic.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1553525A FR3035167B1 (en) | 2015-04-20 | 2015-04-20 | PURGE SOLENOID VALVE FOR VAPOR EXHAUST DEVICE |
| FR1553525 | 2015-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016170268A1 true WO2016170268A1 (en) | 2016-10-27 |
Family
ID=53879598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2016/050920 Ceased WO2016170268A1 (en) | 2015-04-20 | 2016-04-20 | Blowdown electrovalve for vapour venting device |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR3035167B1 (en) |
| WO (1) | WO2016170268A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3082268B1 (en) * | 2018-06-06 | 2020-07-17 | Valeo Systemes De Controle Moteur | ELECTROMAGNETIC DEVICE COMPRISING A VALVE WITH A SHUTTERING MEMBER FOR LIMITING VIBRATION |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560585A (en) * | 1992-12-24 | 1996-10-01 | Robert Bosch Gmbh | Valve for metering introduction of evaporated fuel into an induction duct of an internal combustion engine |
| US5809978A (en) * | 1995-09-12 | 1998-09-22 | Robert Bosch Gmbh | Adsorption filter for a fuel-vapor retention system of a fuel tank of an internal combustion engine |
| US5809977A (en) * | 1995-05-05 | 1998-09-22 | Robert Bosch Gmbh | Valve for metered introduction of volatilized fuel |
| FR2778784A1 (en) * | 1998-05-13 | 1999-11-19 | Renault | METHOD OF CONTROLLING A SOLENOID VALVE, PARTICULARLY A CANISTER BLEEDING CIRCUIT OF A MOTOR |
| DE19852980A1 (en) * | 1998-11-17 | 2000-05-18 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
| FR2788324A1 (en) * | 1999-01-08 | 2000-07-13 | Sagem | Flap seat for electrovalve used in IC engine combustible fuel mixture mixing and feeding systems, has seat which makes less noise during operation |
| US20060081801A1 (en) * | 2003-11-21 | 2006-04-20 | Mitsubishi Denki Kabushiki Kaisha | Solenoid valve |
-
2015
- 2015-04-20 FR FR1553525A patent/FR3035167B1/en active Active
-
2016
- 2016-04-20 WO PCT/FR2016/050920 patent/WO2016170268A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560585A (en) * | 1992-12-24 | 1996-10-01 | Robert Bosch Gmbh | Valve for metering introduction of evaporated fuel into an induction duct of an internal combustion engine |
| US5809977A (en) * | 1995-05-05 | 1998-09-22 | Robert Bosch Gmbh | Valve for metered introduction of volatilized fuel |
| US5809978A (en) * | 1995-09-12 | 1998-09-22 | Robert Bosch Gmbh | Adsorption filter for a fuel-vapor retention system of a fuel tank of an internal combustion engine |
| FR2778784A1 (en) * | 1998-05-13 | 1999-11-19 | Renault | METHOD OF CONTROLLING A SOLENOID VALVE, PARTICULARLY A CANISTER BLEEDING CIRCUIT OF A MOTOR |
| DE19852980A1 (en) * | 1998-11-17 | 2000-05-18 | Bosch Gmbh Robert | Valve for the metered introduction of volatilized fuel |
| FR2788324A1 (en) * | 1999-01-08 | 2000-07-13 | Sagem | Flap seat for electrovalve used in IC engine combustible fuel mixture mixing and feeding systems, has seat which makes less noise during operation |
| US20060081801A1 (en) * | 2003-11-21 | 2006-04-20 | Mitsubishi Denki Kabushiki Kaisha | Solenoid valve |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3035167A1 (en) | 2016-10-21 |
| FR3035167B1 (en) | 2018-05-25 |
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