WO2019162426A1 - Safety device for a fuel tank - Google Patents

Safety device for a fuel tank Download PDF

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Publication number
WO2019162426A1
WO2019162426A1 PCT/EP2019/054414 EP2019054414W WO2019162426A1 WO 2019162426 A1 WO2019162426 A1 WO 2019162426A1 EP 2019054414 W EP2019054414 W EP 2019054414W WO 2019162426 A1 WO2019162426 A1 WO 2019162426A1
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WO
WIPO (PCT)
Prior art keywords
valve
vapors
fuel
conduit
tank
Prior art date
Application number
PCT/EP2019/054414
Other languages
French (fr)
Inventor
Luis Amaya
Samir Guerbaoui
Sylvain Leclercq
Sylvain Gautier
Original Assignee
Valeo Systemes De Controle Moteur
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 Valeo Systemes De Controle Moteur filed Critical Valeo Systemes De Controle Moteur
Publication of WO2019162426A1 publication Critical patent/WO2019162426A1/en

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Classifications

    • 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
    • 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
    • B60K2015/03296—Pressure regulating 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
    • 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
    • B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
    • B60K2015/03514—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems with vapor recovery means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles

Definitions

  • the present invention relates to electromechanical devices comprising a coil and a movable element under the effect of the magnetic field of the coil, and more particularly to an electromechanical device comprising a security element for a fuel tank used in the automotive field.
  • the motor vehicles are typically equipped with an activated carbon filter called canister that absorbs and retains fuel vapors from the tank.
  • the canister is connected to the engine intake via a purge solenoid valve that is closed when the engine is stopped and opens to allow purging of the filter while the engine is running. The excess vapors in the tank are thus evacuated to the engine where they are burned. However, evacuation is done by keeping the fuel tank under overpressure.
  • Hybrid vehicles also include such a canister system associated with a purge solenoid valve.
  • a disadvantage of these systems in a hybrid vehicle comes from the fact that the solenoid valve does not work when the hybrid vehicle is in electric mode, that is to say when the engine does not work.
  • the same problem arises with thermal engine vehicles in situations where the solenoid valve is not activated.
  • an accumulation of fuel vapor is formed in the canister.
  • manufacturers use pressurized fuel tanks to reduce the amount of steam that goes from the fuel tank to the canister. This accumulation of vapors increases the pressure in the tank beyond the pressure threshold tolerated by the tank or defined by the standards in force.
  • the opposite phenomenon can also occur when the vehicle is at a temperature not favoring the evaporation of fuel, or when it remains inactive for a certain period.
  • the present invention therefore aims to overcome one or more of the disadvantages of the prior art devices by providing an electromechanical device comprising a safety device for fuel tank, thus allowing the overpressure or depression of the tank beyond the tolerance thresholds. or defined.
  • the present invention proposes a safety device, for a motor vehicle fuel tank, comprising:
  • a moving element under the effect of the magnetic field generated by the coil comprising a security element configured to activate under the effect of the fuel vapors
  • the device has the advantage of avoiding allowing to keep the tank overpressure.
  • the overpressure limits the passage of steam to the canister, and thus to avoid the saturation of the canister.
  • the safety device for a motor vehicle fuel tank, comprises:
  • a movable element under the effect of the magnetic field generated by the coil, forming a first passage for the circulation of fuel vapor when it is open,
  • a safety element configured to activate under the effect of the fuel vapors and forming a second passage for the fuel vapor circulation when it is open.
  • the security element is formed by a valve.
  • the valve is an on / off type valve.
  • the valve is disposed along the axis X of the device, offset relative to the axis X, so that the vapors arriving by the inlet conduit circulates around the movable member when in the closed position and arrives at the valve.
  • the valve comprises a spring configured to compress under the effect of the pressure exerted by the fuel vapors.
  • the valve is arranged on a second fuel vapor circulation duct so that when the first duct is closed by the electromagnetic system, the vapors can circulate and be controlled by the valve. .
  • the valve comprises an additional security element.
  • this additional safety element is a spring.
  • the invention also relates to an engine assembly comprising:
  • a fuel tank connected by a fuel vapor circulation duct with a canister and opening into an engine
  • a safety device disposed on the vapor circulation duct at the outlet of the fuel tank.
  • the invention also relates to the use of the device according to the invention in a hybrid vehicle.
  • FIG. 1 is a schematic representation of an engine architecture in which the device according to the invention is integrated
  • FIG. 2 is a schematic representation of a longitudinal section of a device according to the invention, 2a) open solenoid valve, 2b) closed solenoid valve,
  • FIG. 3 is a cross-section of the device according to the invention
  • - Figure 4 is a schematic representation of a longitudinal section of another embodiment of a device according to the invention.
  • the fuel tank safety device 10 is integrated in an architecture or assembly 100 motor illustrated in FIG.
  • the engine assembly 100 comprises a tank 1 of fuel connected by a conduit 11 for the circulation of fuel vapors with the canister 2.
  • the fuel vapor circulation conduit opens into the engine 4 with the duct 12 intake.
  • the safety device 10 according to the invention is disposed on this conduit 11 for the circulation of vapors at the outlet of the fuel tank 1.
  • the canister 2 is thus disposed downstream of the security device 10.
  • a canister bleed valve 3 is disposed on the vapor circulation duct 11 at the outlet of the canister 2.
  • the engine is supplied with air via the fresh air inlet duct 5, and the exhaust gases are evacuated via the vent pipe 6.
  • the safety device 10 is composed of a purge solenoid valve comprising a safety element 40.
  • this safety device is to prevent the pressure of the fuel tank is greater than 350mbar or 400 mbar and less than 200 mbar, or 150 mbar.
  • the device 10 comprises a fuel vapor inlet duct 20 connected to the duct 11 for the circulation of vapors arriving from the fuel tank 1, and a connected duct outlet duct 11 for the circulation of vapors flowing to the canister 2.
  • the device 10 comprises a connector 50 for its electrical connection.
  • the materials of the device 10 are selected to resist hydrocarbon vapors, especially gasoline.
  • the body 61 of the device 10 internally houses an electromagnetic system 60.
  • the latter comprises, a fixed core 62, tubular axis X, a soft ferromagnetic material such as for example iron or a ferromagnetic steel.
  • the electromagnetic system 60 includes a coil 63 which extends around the fixed core 10 to generate a magnetic field therein when electrically powered.
  • the coil 63 is for example insulated copper wire, especially enamelled.
  • the device also comprises an element displaceable along the axis X under the effect of the magnetic field generated by the coil 63, this movable element being in the form of a plunger 70, made of a ferromagnetic material, axially movable according to the invention.
  • X axis inside fixed core 62.
  • the plunger 70 is inside the fixed core, in the example considered, and the flow, which is preferably gaseous (fuel vapors in this case), takes place at its contact when it is open.
  • the plunger 70 is made of a soft magnetic material, which loses its magnetization when the magnetic field of the coil ceases, as well as the fixed core 62.
  • the plunger 70 has a tubular portion 71 and a head 72 formed by an annular return to the inside.
  • the head 72 is traversed at its center by an orifice for mounting a valve seal 80.
  • the latter comprises an annular groove in which the return 72 engages and abuts against a valve seat, not visible, when the solenoid valve is at rest, to close the outlet duct 30.
  • a return spring 80 ensures the return of the plunger 70 in its rest position, closure of the outlet duct, in the absence of power supply of the solenoid valve.
  • the fixed core 62 has a thinned zone 622 which makes it possible to concentrate the magnetic induction therein to the point of saturating or almost the magnetic material which constitutes this fixed core.
  • the system 60 is, in the example considered, closed at rest FIG. 2b, and opens FIG. 2a when electrically powered, for example at a DC voltage between
  • the security element 40 of the security device 10 is formed by a valve 40.
  • the valve is an on / off type valve.
  • the valve is disposed along the axis X of the device 10, offset relative to the axis X, illustrated in FIG.
  • the valve is arranged in such a way that the vapors arriving via the inlet conduit 20 circulate around the plunger 70 when it is in the closed position and reaches the level of the valve 40.
  • the inlet conduit 20 extends to form a wall 31 under the end 41 of the valve, oriented in the opposite direction to the flow of vapors to the outlet.
  • the end 41 of the valve when the valve is in the closed position, thus take pressure on the wall 31.
  • the valve comprises a spring 42 which under the effect of the pressure exerted by the vapors arriving through the conduit 20 of arrival compresses. The end 41 moves and is thus no longer in contact with the wall 31. The vapors can then circulate around the valve 40.
  • the valve 40 is thus disposed on a second conduit 21 for circulating the fuel vapors so that when the first conduit is closed by the electromagnetic system, the vapors can circulate and be controlled by the valve 40.
  • the valve 40 is controlled by the engine control unit.
  • the vapor outlet conduit 30 has an opening 43 which opens into the housing 45 in which the valve is disposed. Thus, when the valve 40 is in the open position, the circulating vapors are discharged through the opening 43 of the duct in the outlet duct 30.
  • the valve 40 comprises an additional security element 44.
  • This additional elementary safety is a spring 44. This spring acts in the same direction as the first spring 42 of the valve, and enhances its effect.
  • the operation of the device according to the invention is as follows. When filling the fuel tank by a user, the engine and electrical engines of the vehicle are extinguished.
  • the safety device is in the closed position. Filling the tank causes the formation of fuel vapors. The tank pressure increases. When the pressure value in the tank increases and exceeds 400 mbar, the safety valve opens and releases vapors until the pressure drops to 400 mbar.
  • the valve opens when the pressure exceeds 350 mbar.
  • This mode of operation can be achieved in other operating conditions of the vehicle than filling the tank.
  • Another mode of operation of the device is possible when certain conditions are realized. For example, if the ambient temperature is low or if the vehicle is not running. The pressure in the tank drops, the tank is then in depression. In this case, the valve remains closed, so that the pressure rises sufficiently for the tank is again in overpressure. The valve remains closed when the pressure is less than 200 mbar, and according to one embodiment of the invention, less than 150 mbar.

Abstract

The present invention relates to a safety device (10) for a motor vehicle fuel tank, including: - A coil (63), - an element (70) able to move under the effect of the magnetic field generated by the coil, forming a first passage for the flow of fuel vapour when it is open, the device including a safety element (40) configured so as to activate under the effect of the fuel vapours and forming a second passage for the flow of fuel vapour when it is open.

Description

DISPOSITIF DE SECURITE POUR RESERVOIR DE CARBURANT  SAFETY DEVICE FOR FUEL TANK
La présente invention concerne les dispositifs électromécaniques comportant une bobine et un élément mobile sous l'effet du champ magnétique de la bobine, et plus particulièrement un dispositif électromécanique comportant un élément de sécurité pour réservoir de carburant utilisé dans le domaine automobile. The present invention relates to electromechanical devices comprising a coil and a movable element under the effect of the magnetic field of the coil, and more particularly to an electromechanical device comprising a security element for a fuel tank used in the automotive field.
Les véhicules à moteur thermique sont classiquement muni d'un filtre à charbon actif appelé canister qui absorbe et retient les vapeurs de carburant provenant du réservoir. Le canister est relié à l'admission du moteur via une électrovanne de purge qui est fermée lorsque le moteur est à l'arrêt et qui s'ouvre de façon à permettre la purge du filtre lorsque le moteur est en fonctionnement. Les vapeurs en surplus dans le réservoir sont ainsi évacuées vers le moteur ou elles sont brûlées. L'évacuation se fait toutefois en maintenant le réservoir de carburant en surpression.  The motor vehicles are typically equipped with an activated carbon filter called canister that absorbs and retains fuel vapors from the tank. The canister is connected to the engine intake via a purge solenoid valve that is closed when the engine is stopped and opens to allow purging of the filter while the engine is running. The excess vapors in the tank are thus evacuated to the engine where they are burned. However, evacuation is done by keeping the fuel tank under overpressure.
Les véhicules hybrides comportent également un tel système de canister associé à une électrovanne de purge.  Hybrid vehicles also include such a canister system associated with a purge solenoid valve.
Un inconvénient de ces systèmes dans un véhicule hybride, provient du fait que l'électrovanne ne fonctionne pas lorsque le véhicule hybride est en mode électrique, c'est-à-dire lorsque le moteur thermique ne fonctionne pas. Le même problème se pose avec des véhicules à moteur thermique dans des situations où l'électrovanne n'est pas activée. Dans ces cas la, une accumulation de vapeur de carburant se forme dans le canister. Pour éviter la saturation des vapeurs dans le canister, les constructeurs utilisent des réservoirs de carburant sous pression afin de réduire la quantité de vapeur qui va du réservoir de carburant au canister. Cette accumulation des vapeurs augmente la pression dans le réservoir au delà du seuil de pression toléré par le réservoir ou défini par les normes en vigueurs. Le phénomène inverse peut également se produire lorsque le véhicule est à une température ne favorisant l'évaporation du carburant, ou lorsqu'il reste inactif durant une certaine période.  A disadvantage of these systems in a hybrid vehicle, comes from the fact that the solenoid valve does not work when the hybrid vehicle is in electric mode, that is to say when the engine does not work. The same problem arises with thermal engine vehicles in situations where the solenoid valve is not activated. In these cases, an accumulation of fuel vapor is formed in the canister. To avoid the saturation of vapors in the canister, manufacturers use pressurized fuel tanks to reduce the amount of steam that goes from the fuel tank to the canister. This accumulation of vapors increases the pressure in the tank beyond the pressure threshold tolerated by the tank or defined by the standards in force. The opposite phenomenon can also occur when the vehicle is at a temperature not favoring the evaporation of fuel, or when it remains inactive for a certain period.
Il est ainsi nécessaire de prévoir un dispositif permettant d'éviter cette augmentation ou diminution de pression dans le réservoir de carburant. La présente invention a donc pour objet de pallier un ou plusieurs des inconvénients des dispositifs de l'art antérieur en proposant un dispositif électromécanique comportant un dispositif de sécurité pour réservoir de carburant, permettant ainsi la surpression ou dépression du réservoir au delà des seuils de tolérance ou définis. It is thus necessary to provide a device to prevent this increase or decrease in pressure in the fuel tank. The present invention therefore aims to overcome one or more of the disadvantages of the prior art devices by providing an electromechanical device comprising a safety device for fuel tank, thus allowing the overpressure or depression of the tank beyond the tolerance thresholds. or defined.
Pour cela la présente invention propose un dispositif de sécurité, pour réservoir de carburant de véhicule automobile, comportant:  For this purpose, the present invention proposes a safety device, for a motor vehicle fuel tank, comprising:
Une bobine,  A coil,
un élément mobile sous l'effet du champ magnétique généré par la bobine, comportant un élément de sécurité configuré pour s'activer sous l'effet des vapeurs de carburant  a moving element under the effect of the magnetic field generated by the coil, comprising a security element configured to activate under the effect of the fuel vapors
Le dispositif a pour avantage d'éviter de permettre de garder le réservoir en surpression. La surpression permet de limiter le passage de vapeur vers le canister, et ainsi d'éviter la saturation du canister.  The device has the advantage of avoiding allowing to keep the tank overpressure. The overpressure limits the passage of steam to the canister, and thus to avoid the saturation of the canister.
Selon un mode de réalisation de l'invention, le dispositif de sécurité, pour réservoir de carburant de véhicule automobile, comporte:  According to one embodiment of the invention, the safety device, for a motor vehicle fuel tank, comprises:
Une bobine,  A coil,
un élément mobile sous l'effet du champ magnétique généré par la bobine, formant un permier passage pour la circulation de vapeur de carburant lorsqu'il est ouvert,  a movable element under the effect of the magnetic field generated by the coil, forming a first passage for the circulation of fuel vapor when it is open,
et un élément de sécurité configuré pour s'activer sous l'effet des vapeurs de carburant et formant un deuxième passage pour la circulation de vapeur de carburant lorsqu'il est ouvert. and a safety element configured to activate under the effect of the fuel vapors and forming a second passage for the fuel vapor circulation when it is open.
Selon un mode de réalisation de l'invention, l'élément de sécurité est formé par une vanne.  According to one embodiment of the invention, the security element is formed by a valve.
Selon un mode de réalisation de l'invention, la vanne est une vanne de type on/off.  According to one embodiment of the invention, the valve is an on / off type valve.
Selon un mode de réalisation de l'invention, la vanne est disposée selon l'axe X du dispositif, déportée par rapport à l'axe X, de façon à ce que les vapeurs arrivant par le conduit d'entrée circulent autour de l'élément mobile lorsqu'il est en position fermé et arrive au niveau de la vanne. According to one embodiment of the invention, the valve is disposed along the axis X of the device, offset relative to the axis X, so that the vapors arriving by the inlet conduit circulates around the movable member when in the closed position and arrives at the valve.
Selon un mode de réalisation de l'invention, la vanne comporte un ressort configuré pour se comprimer sous l'effet de la pression exercée par les vapeurs de carburant.  According to one embodiment of the invention, the valve comprises a spring configured to compress under the effect of the pressure exerted by the fuel vapors.
Selon un mode de réalisation de l'invention, la vanne est disposée sur un second conduit de circulation des vapeurs de carburant de façon à ce que lorsque le premier conduit est fermé par le système électromagnétique, les vapeurs puissent circuler et être contrôlées par la vanne.  According to one embodiment of the invention, the valve is arranged on a second fuel vapor circulation duct so that when the first duct is closed by the electromagnetic system, the vapors can circulate and be controlled by the valve. .
Selon un mode de réalisation de l'invention, la vanne comporte un élément de sécurité supplémentaire.  According to one embodiment of the invention, the valve comprises an additional security element.
Selon un mode de réalisation de l'invention, cet élément supplémentaire de sécurité est un ressort.  According to one embodiment of the invention, this additional safety element is a spring.
L'invention concerne également, un ensemble moteur comportant :  The invention also relates to an engine assembly comprising:
un réservoir de carburant en relation par un conduit de circulation des vapeurs de carburant avec un canister et débouchant dans un moteur  a fuel tank connected by a fuel vapor circulation duct with a canister and opening into an engine
un dispositif de sécurité selon l'invention disposé sur ce conduit de circulation des vapeurs en sortie du réservoir de carburant.  a safety device according to the invention disposed on the vapor circulation duct at the outlet of the fuel tank.
L'invention concerne également, l'utilisation du dispositif selon l'invention dans un véhicule hybride.  The invention also relates to the use of the device according to the invention in a hybrid vehicle.
D'autres buts, caractéristiques et avantages de l'invention seront mieux compris et apparaîtront plus clairement à la lecture de la description faite, ci-après, en se référant aux figures annexées, données à titre d'exemple et dans lesquelles: Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which:
- - la figure 1 est une représentation schématique d'une architecture moteur dans laquelle est intégré le dispositif selon l'invention,  FIG. 1 is a schematic representation of an engine architecture in which the device according to the invention is integrated,
- La figure 2 est une représentation schématique d'une coupe longitudinale d'un dispositif selon l'invention, 2a) électrovanne ouverte, 2b) électrovanne fermée,  FIG. 2 is a schematic representation of a longitudinal section of a device according to the invention, 2a) open solenoid valve, 2b) closed solenoid valve,
- La figure 3 est une coupe transversale du dispositif selon l'invention, - La figure 4 est une représentation schématique d'une coupe longitudinale d'un autre mode de réalisation d'un dispositif selon l'invention. FIG. 3 is a cross-section of the device according to the invention, - Figure 4 is a schematic representation of a longitudinal section of another embodiment of a device according to the invention.
Le dispositif 10 de sécurité pour réservoir de carburant selon l'invention est intégré dans une architecture ou ensemble 100 moteur illustrée figure 1. The fuel tank safety device 10 according to the invention is integrated in an architecture or assembly 100 motor illustrated in FIG.
L'ensemble 100 moteur comporte un réservoir 1 de carburant en relation par un conduit 11 de circulation des vapeurs de carburant avec le canister 2. Le conduit de circulation des vapeurs de carburant débouche dans le moteur 4 avec le conduit 12 d'admission. Le dispositif 10 de sécurité selon l'invention est disposé sur ce conduit 11 de circulation des vapeurs en sortie du réservoir 1 de carburant. Le canister 2 est ainsi disposé en aval du dispositif 10 de sécurité. Une vanne 3 de purge canister est disposée sur le conduit 11 de circulation des vapeurs en sortie du canister 2. Le moteur est alimenté en air via le conduit d'entrée d'air 5 frais, et les gaz d'échappement sont évacués via le conduit d'évacuation 6.  The engine assembly 100 comprises a tank 1 of fuel connected by a conduit 11 for the circulation of fuel vapors with the canister 2. The fuel vapor circulation conduit opens into the engine 4 with the duct 12 intake. The safety device 10 according to the invention is disposed on this conduit 11 for the circulation of vapors at the outlet of the fuel tank 1. The canister 2 is thus disposed downstream of the security device 10. A canister bleed valve 3 is disposed on the vapor circulation duct 11 at the outlet of the canister 2. The engine is supplied with air via the fresh air inlet duct 5, and the exhaust gases are evacuated via the vent pipe 6.
Ainsi les vapeurs autorisées, via le dispositif de sécurité, à traverser le dispositif 10 de sécurité, arrivent dans le canister 2. Puis en fonction des conditions de fonctionnement du moteur, ces vapeurs sont recyclées par la vanne 3 de purge canister vers l'entrée moteur 4.  Thus the vapors authorized, via the safety device, to pass through the safety device 10, arrive in the canister 2. Then, depending on the operating conditions of the engine, these vapors are recycled by the canister purge valve 3 to the inlet motor 4.
Le dispositif 10 de sécurité selon l'invention illustré figures 2 et 3, est composé d'une électrovanne de purge comportant un élément 40 de sécurité.  The safety device 10 according to the invention illustrated in FIGS. 2 and 3, is composed of a purge solenoid valve comprising a safety element 40.
L'objectif de ce dispositif de sécurité est d'éviter que la pression du réservoir de carburant soit supérieure à 350mbar, voire 400 mbar et inférieure à 200 mbar, voire 150 mbar.  The purpose of this safety device is to prevent the pressure of the fuel tank is greater than 350mbar or 400 mbar and less than 200 mbar, or 150 mbar.
Le dispositif 10 comporte un conduit 20 d'entrée des vapeurs de carburant connecté au conduit 11 de circulation des vapeurs arrivant du réservoir 1 de carburant, et un conduit 30 de sortie connecté conduit 11 de circulation des vapeurs circulant vers le canister 2.  The device 10 comprises a fuel vapor inlet duct 20 connected to the duct 11 for the circulation of vapors arriving from the fuel tank 1, and a connected duct outlet duct 11 for the circulation of vapors flowing to the canister 2.
Le dispositif 10 comporte un connecteur 50 pour son raccordement électrique. The device 10 comprises a connector 50 for its electrical connection.
Les matériaux du dispositif 10 sont choisis pour résister aux vapeurs d'hydrocarbures, notamment d'essence. Le corps 61 du dispositif 10 loge intérieurement un système 60 électromagnétique. Ce dernier comporte, un noyau fixe 62, tubulaire d'axe X, en un matériau ferromagnétique doux tel que par exemple du fer ou un acier ferromagnétique. The materials of the device 10 are selected to resist hydrocarbon vapors, especially gasoline. The body 61 of the device 10 internally houses an electromagnetic system 60. The latter comprises, a fixed core 62, tubular axis X, a soft ferromagnetic material such as for example iron or a ferromagnetic steel.
Le système 60 électromagnétique comporte une bobine 63 qui s'étend autour du noyau fixe 10 pour générer en son sein un champ magnétique lorsqu'il est alimenté électriquement. La bobine 63 est par exemple en fil de cuivre isolé, notamment émaillé.  The electromagnetic system 60 includes a coil 63 which extends around the fixed core 10 to generate a magnetic field therein when electrically powered. The coil 63 is for example insulated copper wire, especially enamelled.
Le dispositif comporte également un élément déplaçable selon l'axe X sous l'effet du champ magnétique généré par la bobine 63, cet élément mobile étant sous la forme d'un noyau plongeur 70, réalisé en un matériau ferromagnétique, mobile axialement selon l'axe X à l'intérieur du noyau fixe 62.  The device also comprises an element displaceable along the axis X under the effect of the magnetic field generated by the coil 63, this movable element being in the form of a plunger 70, made of a ferromagnetic material, axially movable according to the invention. X axis inside fixed core 62.
Le noyau plongeur 70 est intérieur au noyau fixe, dans l'exemple considéré, et l'écoulement, qui est de préférence gazeux (vapeurs de carburant en l'espèce), a lieu à son contact quand il est ouvert.  The plunger 70 is inside the fixed core, in the example considered, and the flow, which is preferably gaseous (fuel vapors in this case), takes place at its contact when it is open.
De préférence, le noyau plongeur 70 est en un matériau magnétique doux, qui perd son aimantation lorsque le champ magnétique de la bobine cesse, de même que le noyau fixe 62.  Preferably, the plunger 70 is made of a soft magnetic material, which loses its magnetization when the magnetic field of the coil ceases, as well as the fixed core 62.
Le noyau plongeur 70 comporte une partie tubulaire 71 et une tête 72 formée par un retour annulaire vers l'intérieur. La tête 72 est traversée en son centre par un orifice pour le montage d'un joint de clapet 80. Ce dernier comporte une gorge annulaire dans laquelle s'engage le retour 72 et vient en appui contre un siège de clapet, non visible, lorsque l'électrovanne est au repos, pour fermer le conduit de sortie 30.  The plunger 70 has a tubular portion 71 and a head 72 formed by an annular return to the inside. The head 72 is traversed at its center by an orifice for mounting a valve seal 80. The latter comprises an annular groove in which the return 72 engages and abuts against a valve seat, not visible, when the solenoid valve is at rest, to close the outlet duct 30.
Un ressort de rappel 80 assure le retour du noyau plongeur 70 dans sa position de repos, de fermeture du conduit de sortie, en l'absence d'alimentation électrique de l'électrovanne.  A return spring 80 ensures the return of the plunger 70 in its rest position, closure of the outlet duct, in the absence of power supply of the solenoid valve.
Selon un mode de réalisation de l'invention, Le noyau fixe 62 présente une zone amincie 622 qui permet de concentrer l'induction magnétique dans celui-ci au point de saturer ou presque le matériau magnétique qui constitue ce noyau fixe.  According to one embodiment of the invention, the fixed core 62 has a thinned zone 622 which makes it possible to concentrate the magnetic induction therein to the point of saturating or almost the magnetic material which constitutes this fixed core.
Le système 60 est, dans l'exemple considéré, fermée au repos figure 2b, et s'ouvre figure 2a lorsqu'alimenté électriquement, par exemple à une tension DC comprise entre The system 60 is, in the example considered, closed at rest FIG. 2b, and opens FIG. 2a when electrically powered, for example at a DC voltage between
10 et 15V. L'élément 40 de sécurité du dispositif 10 de sécurité est formé par une vanne 40.10 and 15V. The security element 40 of the security device 10 is formed by a valve 40.
Selon un mode de réalisation de l'invention, la vanne est une vanne de type on/off. According to one embodiment of the invention, the valve is an on / off type valve.
La vanne est disposée selon l'axe X du dispositif 10, déportée par rapport à l'axe X, illustré figure 3  The valve is disposed along the axis X of the device 10, offset relative to the axis X, illustrated in FIG.
Comme illustré figure 3, la vanne est disposée de façon à ce que les vapeurs arrivant par le conduit 20 d'entrée circule autour du noyau plongeur 70 lorsqu'il est en position fermé et arrive au niveau de la vanne 40.  As illustrated in FIG. 3, the valve is arranged in such a way that the vapors arriving via the inlet conduit 20 circulate around the plunger 70 when it is in the closed position and reaches the level of the valve 40.
Plus précisément, le conduit 20 d'arrivée se prolonge de façon à former une paroi 31 sous l'extrémité 41 de la vanne, orientée dans la direction opposée à la circulation des vapeurs vers la sortie. L'extrémité 41 de la vanne, lorsque la vanne est en position fermée, prends ainsi appuie sur la paroi 31. La vanne comporte un ressort 42 qui sous l'effet de la pression exercée par les vapeurs arrivant par le conduit 20 d'arrivée se comprime. L'extrémité 41 se déplace et n'est ainsi plus en contact avec la paroi 31. Les vapeurs peuvent alors circuler autour de la vanne 40.  Specifically, the inlet conduit 20 extends to form a wall 31 under the end 41 of the valve, oriented in the opposite direction to the flow of vapors to the outlet. The end 41 of the valve, when the valve is in the closed position, thus take pressure on the wall 31. The valve comprises a spring 42 which under the effect of the pressure exerted by the vapors arriving through the conduit 20 of arrival compresses. The end 41 moves and is thus no longer in contact with the wall 31. The vapors can then circulate around the valve 40.
La vanne 40 est ainsi disposée sur un second conduit 21 de circulation des vapeurs de carburant de façon à ce que lorsque le premier conduit est fermé par le système électromagnétique, les vapeurs puissent circuler et être contrôlées par la vanne 40.  The valve 40 is thus disposed on a second conduit 21 for circulating the fuel vapors so that when the first conduit is closed by the electromagnetic system, the vapors can circulate and be controlled by the valve 40.
Selon un mode de réalisation de l'invention, la vanne 40 est commandée par l'unité de contrôle moteur.  According to one embodiment of the invention, the valve 40 is controlled by the engine control unit.
Le conduit 30 de sortie des vapeurs comporte une ouverture 43 qui débouche dans le logement 45 dans lequel est disposée la vanne. Ainsi, lorsque la vanne 40 est en position ouverte, les vapeurs circulant sont évacuées par l'ouverture 43 du conduit dans le conduit 30 de sortie.  The vapor outlet conduit 30 has an opening 43 which opens into the housing 45 in which the valve is disposed. Thus, when the valve 40 is in the open position, the circulating vapors are discharged through the opening 43 of the duct in the outlet duct 30.
Selon un mode de réalisation de l'invention, illustré figure 4, la vanne 40 comporte un élément 44 de sécurité supplémentaire. Cet élémentaire supplémentaire de sécurité est un ressort 44. Ce ressort agit dans le même sens que le premier ressort 42 de la vanne, et accentue son effet.  According to one embodiment of the invention, illustrated in FIG. 4, the valve 40 comprises an additional security element 44. This additional elementary safety is a spring 44. This spring acts in the same direction as the first spring 42 of the valve, and enhances its effect.
Le fonctionnement du dispositif selon l'invention est le suivant. Lors du remplissage du réservoir de carburant par un utilisateur, les moteurs thermiques et électriques du véhicule sont éteints. Le dispositif de sécurité est en position fermé. Le remplissage du réservoir provoque la formation de vapeurs de carburant. La pression du réservoir augment. Lorsque la valeur de pression dans le réservoir augmente et dépasse 400 mbar, la vanne de sécurité s'ouvre et libère des vapeurs jusqu'à ce que la pression redescende à 400 mbar. The operation of the device according to the invention is as follows. When filling the fuel tank by a user, the engine and electrical engines of the vehicle are extinguished. The safety device is in the closed position. Filling the tank causes the formation of fuel vapors. The tank pressure increases. When the pressure value in the tank increases and exceeds 400 mbar, the safety valve opens and releases vapors until the pressure drops to 400 mbar.
Selon un mode de réalisation de l'invention, la vanne s'ouvre lorsque la pression dépasse 350 mbar.  According to one embodiment of the invention, the valve opens when the pressure exceeds 350 mbar.
Ce mode de fonctionnement peut se réaliser dans d'autres conditions de fonctionnement du véhicule que le remplissage du réservoir.  This mode of operation can be achieved in other operating conditions of the vehicle than filling the tank.
Un autre mode de fonctionnement du dispositif est possible lorsque certaines conditions sont réalisées. Par exemple si la température ambiante est basse ou si le véhicule ne circule pas. La pression dans le réservoir baisse, le réservoir est alors en dépression. Dans ce cas la, la vanne reste fermée, de façon à ce que la pression remonte suffisamment pour que le réservoir soit de nouveau en surpression. La vanne reste fermée lorsque la pression est inférieure à 200 mbar, et selon un mode de réalisation de l'invention, inférieure à 150 mbar.  Another mode of operation of the device is possible when certain conditions are realized. For example, if the ambient temperature is low or if the vehicle is not running. The pressure in the tank drops, the tank is then in depression. In this case, the valve remains closed, so that the pressure rises sufficiently for the tank is again in overpressure. The valve remains closed when the pressure is less than 200 mbar, and according to one embodiment of the invention, less than 150 mbar.
La portée de la présente invention ne se limite pas aux détails donnés ci-dessus et permet des modes de réalisation sous de nombreuses autres formes spécifiques sans s'éloigner du domaine d'application de l'invention. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration, et peuvent être modifiés sans toutefois sortir de la portée définie par les revendications supportées par la description.  The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims supported by the description.

Claims

REVENDICATIONS
1. Dispositif (10) de sécurité, pour réservoir de carburant de véhicule automobile, comportant: 1. Device (10) for safety, for a motor vehicle fuel tank, comprising:
Une bobine (63),  A coil (63),
un élément (70) mobile sous l'effet du champ magnétique généré par la bobine,  a member (70) movable under the effect of the magnetic field generated by the coil,
caractérisé en ce qu'il comporte un élément (40) de sécurité configuré pour s'activer sous l'effet des vapeurs de carburant.  characterized in that it comprises a safety element (40) configured to activate under the effect of fuel vapors.
2. Dispositif selon la revendication 1, dans lequel l'élément 40 de sécurité est formé par une vanne (40).  2. Device according to claim 1, wherein the security element 40 is formed by a valve (40).
3. Dispositif selon la revendication 1 ou 2, dans lequel la vanne est une vanne de type on/off.  3. Device according to claim 1 or 2, wherein the valve is an on / off type valve.
4. Dispositif selon une des revendications 1 à 3, dans lequel la vanne est disposée selon l'axe X du dispositif (10), déportée par rapport à l'axe X, de façon à ce que les vapeurs arrivant par le conduit (20) d'entrée circulent autour de l'élément mobile (70) lorsqu'il est en position fermé et arrive au niveau de la vanne (40). 4. Device according to one of claims 1 to 3, wherein the valve is disposed along the axis X of the device (10), offset relative to the axis X, so that the vapors arriving through the conduit (20). ) are circulating around the movable member (70) when in the closed position and arrives at the valve (40).
5. Dispositif selon une des revendications 1 à 4, dans lequel la vanne comporte un ressort (42) configuré pour se comprimer sous l'effet de la pression exercée par les vapeurs de carburant. 5. Device according to one of claims 1 to 4, wherein the valve comprises a spring (42) configured to compress under the effect of the pressure exerted by the fuel vapors.
6. Dispositif selon l'une quelconque des revendications 1 à 5, dans lequel la vanne (40) est disposée sur un second conduit de circulation des vapeurs de carburant de façon à ce que lorsque le premier conduit est fermé par le système électromagnétique, les vapeurs puissent circuler et être contrôlées par la vanne (40).  6. Device according to any one of claims 1 to 5, wherein the valve (40) is disposed on a second fuel vapor circulation conduit so that when the first conduit is closed by the electromagnetic system, the vapors can flow and be controlled by the valve (40).
7. Dispositif selon l'une quelconque des revendications 1 à 6, dans lequel la vanne (40) comporte un élément (44) de sécurité supplémentaire.  7. Device according to any one of claims 1 to 6, wherein the valve (40) comprises an element (44) additional security.
8. Dispositif selon l'une quelconque des revendications 1 à 7, dans lequel cet élément supplémentaire de sécurité est un ressort (44).  8. Device according to any one of claims 1 to 7, wherein said additional security element is a spring (44).
9. Ensemble (100) moteur comportant : un réservoir (1) de carburant en relation par un conduit (11) de circulation des vapeurs de carburant avec un canister (2) et débouchant dans un moteur (4) un dispositif (10) de sécurité disposé sur ce conduit (11) de circulation des vapeurs en sortie du réservoir (1) de carburant. 9. (100) engine assembly comprising: a tank (1) of fuel connected by a conduit (11) for the circulation of fuel vapors with a canister (2) and opening into a motor (4) a device (10) security arranged on the conduit (11) of circulation of vapors at the outlet of the fuel tank (1).
10. Utilisation du dispositif (10) selon une de revendications 1 à 8 dans un véhicule hybride. 10. Use of the device (10) according to one of claims 1 to 8 in a hybrid vehicle.
PCT/EP2019/054414 2018-02-23 2019-02-22 Safety device for a fuel tank WO2019162426A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1851611A FR3078294B1 (en) 2018-02-23 2018-02-23 SAFETY DEVICE FOR FUEL TANK
FR1851611 2018-02-23

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WO2019162426A1 true WO2019162426A1 (en) 2019-08-29

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WO (1) WO2019162426A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211151A (en) * 1991-02-27 1993-05-18 Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Co., Ltd.) Apparatus for restricting discharge of evaporated fuel gas
US20110162728A1 (en) * 2009-04-22 2011-07-07 Eaton Corporation Valve assembly for high-pressure fluid reservoir
US20120055943A1 (en) * 2010-09-03 2012-03-08 A. Kayser Automotive Systems Gmbh Ventilation Arrangement For A Fuel Tank
US20160375759A1 (en) * 2014-01-30 2016-12-29 Raval A.C.S. Ltd. Pressure relief valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211151A (en) * 1991-02-27 1993-05-18 Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Co., Ltd.) Apparatus for restricting discharge of evaporated fuel gas
US20110162728A1 (en) * 2009-04-22 2011-07-07 Eaton Corporation Valve assembly for high-pressure fluid reservoir
US20120055943A1 (en) * 2010-09-03 2012-03-08 A. Kayser Automotive Systems Gmbh Ventilation Arrangement For A Fuel Tank
US20160375759A1 (en) * 2014-01-30 2016-12-29 Raval A.C.S. Ltd. Pressure relief valve

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FR3078294B1 (en) 2020-05-22

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