WO2022137887A1 - 弁装置 - Google Patents

弁装置 Download PDF

Info

Publication number
WO2022137887A1
WO2022137887A1 PCT/JP2021/041933 JP2021041933W WO2022137887A1 WO 2022137887 A1 WO2022137887 A1 WO 2022137887A1 JP 2021041933 W JP2021041933 W JP 2021041933W WO 2022137887 A1 WO2022137887 A1 WO 2022137887A1
Authority
WO
WIPO (PCT)
Prior art keywords
float
valve
sub
subfloat
seat
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
Application number
PCT/JP2021/041933
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
隆弘 酒井
充輝 寺本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Piolax Inc
Original Assignee
Piolax Inc
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 Piolax Inc filed Critical Piolax Inc
Priority to CN202180084767.5A priority Critical patent/CN116761734B/zh
Priority to JP2022571956A priority patent/JP7387919B2/ja
Priority to US18/267,663 priority patent/US12103380B2/en
Publication of WO2022137887A1 publication Critical patent/WO2022137887A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
    • F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
    • F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
    • F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve
    • 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
    • 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
    • B60K2015/03289—Float valves; Floats therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3003—Fluid separating traps or vents
    • Y10T137/3084—Discriminating outlet for gas
    • Y10T137/309—Fluid sensing valve
    • Y10T137/3099—Float responsive

Definitions

  • the present invention relates to a valve device that is attached to a fuel tank of an automobile or the like and is used as a fuel outflow prevention valve, a full tank control valve, or the like.
  • the fuel tank of a vehicle is equipped with a valve device that prevents the fuel in the fuel tank from leaking to the outside of the fuel tank when the vehicle tilts or rolls over.
  • a valve device generally has a housing provided with a vent chamber above and a valve chamber below via a partition wall having vents, and a float valve disposed in the valve chamber so as to be able to move up and down. ..
  • a float valve is provided in a room defined inside the housing, and a convex step portion that rises upward is formed in the center of the upper surface of the float valve, while being fixed to the upper surface side of the float valve.
  • the retainer has a flange portion that covers the upper surface of the float valve and a cage portion that rises from the flange portion and defines a storage space between the convex step portion of the float valve.
  • a fuel leak prevention valve having a structure in which the valve plate is swingably stored in the storage space formed is described. Further, an opening is formed in the partition wall, and a valve seat is vertically provided from the back peripheral edge of the opening.
  • an object of the present invention is to provide a valve device capable of suppressing fuel leakage from an opening even if the vehicle vibrates when the float valve is submerged.
  • the valve device is provided with a valve chamber communicating with the inside of the fuel tank below and a ventilation chamber communicating with the outside of the fuel tank above the partition wall through the partition wall.
  • the float valve has a housing provided with an opening for communicating the valve chamber and the ventilation chamber, and a float valve which is housed in the valve chamber so as to be able to move up and down and opens and closes the opening.
  • the main float, a subfloat held above the main float so as to be able to move up and down by a predetermined distance, and the subfloat are arranged between the main float and the subfloat, and the subfloat is the main.
  • the sub-float urging spring that urges the float upward, and the sub-float is in contact with and separated from a spring support portion that supports the upper end of the sub-float urging spring and the opening. With the float valve raised and the opening closed by the subfloat, the subfloat urging spring is compressed to the main float with respect to the subfloat. Is characterized in that it can be moved further upward.
  • the float valve when the float valve is immersed in fuel, buoyancy acts on the float valve to raise it, and the vehicle is in a state where the seal portion of the subfloat abuts on the opening and the opening is closed.
  • the main float compresses the subfloat urging spring and moves upward with respect to the subfloat. Therefore, the movement of the main float can absorb the vehicle vibration and the subfloat urging spring expands and contracts. This makes it possible to reliably maintain the state in which the seal portion is in contact with the opening while absorbing the vehicle vibration, and to reliably suppress fuel leakage from the opening to the ventilation chamber.
  • FIG. 3 is a cross-sectional view of a state in which the float valve is raised from the state shown in FIG.
  • FIG. 9 is a cross-sectional view of a state in which the main float is further moved upward with respect to the sub float due to vehicle vibration from the state shown in FIG.
  • Another embodiment of the valve device according to the present invention is shown, and is an exploded perspective view thereof. It is a perspective view of the valve device. It is a perspective view when the housing is shown in the cross section in the valve device. It is sectional drawing of the valve device. It is sectional drawing of the state which the float valve rises and closed the opening from the state shown in FIG.
  • FIG. 15 is a cross-sectional view of a state in which the main float is further moved upward with respect to the sub float due to vehicle vibration from the state shown in FIG.
  • fuel means liquid fuel (including droplets of fuel)
  • fuel vapor means evaporated fuel
  • the valve device 10 in this embodiment has a housing 15 having a valve chamber V and a ventilation chamber R, and a float valve 40 arranged so as to be able to move up and down in the valve chamber V.
  • the float valve 40 is arranged between the main float 50, the sub-float 70 held above the main float 50 so as to be able to move up and down by a predetermined distance with respect to the main float 50, and the main float 50 and the sub-float 70. Therefore, it has a sub-float urging spring S1 (hereinafter, also simply referred to as “urging spring S1”) that urges the sub-float 70 upward with respect to the main float 50.
  • the float valve 40 of this embodiment has a main float urging spring S2 (hereinafter, also simply referred to as “urging spring S2”) that urges the main float 50 upward.
  • the urging springs S1 and S2 are coil springs formed by winding a wire rod having a predetermined diameter. Further, the spring length (length along the axial direction) of the first urging spring S1 is formed to be shorter than the spring length of the second urging spring S2. Further, with the float valve 40 rising and the opening 23 closed by the subfloat 70, the spring force of the urging spring S1 is based on the sum of the spring force of the urging spring S2 and the buoyancy of the float valve 40. , It is set to be smaller than the value obtained by subtracting the weight of the float valve 40.
  • the housing 15 has a substantially cylindrical shape, has a housing body 20 having a partition wall 22 above, a lower cap 30 mounted below the housing body 20, and an upper portion mounted above the housing body 20. It has a cap 35.
  • the housing body 20 has a substantially cylindrical peripheral wall 21, and a partition wall 22 is arranged above the peripheral wall 21.
  • a plurality of locking claws 21a are projected from below the peripheral wall 21, and a plurality of ventilation holes 21b are formed above the peripheral wall 21.
  • a round hole-shaped opening 23 is formed in the central portion of the partition wall 22.
  • the valve seat 23a projects downward from the back peripheral edge of the opening 23 of the partition wall 22.
  • the valve seat 23a in this embodiment has a substantially cylindrical shape extending along the axial direction of the valve device 10 (direction along the axial center C of the valve device 10).
  • the valve seat 23 may constitutes the "cylindrical valve seat" in the present invention. As shown in FIG.
  • the valve seat 23a extends by a length extending to a gap K formed inside a plurality of holding portions 65 of the subfloat holding portion 60, which will be described later, when the float valve 40 is lowered. Further, as shown in FIGS. 9 and 10, the valve seat 23a can come into contact with the seat valve 80 of the subfloat 70 through the insertion hole 86a of the subfloat 70 when the float valve 40 is raised.
  • a box-shaped portion 25 having a bottomed box shape is provided from above the outer periphery of the peripheral wall 21.
  • a vent 26a is formed in the box-shaped portion 25 (see FIG. 3), and a substantially cylindrical connecting pipe 26 extends outward from the outer peripheral edge of the vent 26a. ing.
  • a tube (not shown) that communicates with a canister or the like arranged outside the fuel tank (not shown) is connected to the connecting pipe 26.
  • a mounting portion 27 is provided so as to surround the opening 23 and the upper opening of the box-shaped portion 25. The mounting portion 27 mounts the valve device 10 in the fuel tank by locking it to a mounting bracket (not shown) provided in the fuel tank.
  • the lower cap 30 has a bottom wall 31 having a substantially disk shape and a peripheral wall 32 erected from the peripheral edge thereof.
  • a plurality of through holes 31a are formed in the bottom wall 31, and a plurality of locking holes 32a are formed in the peripheral wall 32.
  • the upper cap 35 has a substantially elongated plate shape, and an annular wall portion 35a is projected from the back peripheral edge thereof.
  • the main float 50 constituting the float valve 40 has a substantially cylindrical peripheral wall 51 and a ceiling wall 52 arranged slightly below the upper end of the peripheral wall 51. is doing. Further, from the outer periphery of the peripheral wall 51, guide ribs 51a having ridges extending along the axial direction of the float valve 40 are provided at predetermined intervals in the circumferential direction. Further, an internal space 53 is formed inside the peripheral wall 51 and the ceiling wall 52 (see FIG. 3), and a plurality of opening windows 51b communicating with the internal space 53 are formed below the peripheral wall 51. Has been done.
  • a spring accommodating recess 54 having an opening downward and denting upward is formed from the lower surface side of the radial center of the ceiling wall 52 (see FIG. 3).
  • the urging spring S2 is accommodated in the spring accommodating recess 54.
  • a sub-float accommodating recess 55 having an upper opening and a concave shape recessed downward is formed.
  • the subfloat 70 is accommodated in the subfloat accommodating recess 55 so as to be able to move up and down.
  • a plurality of engaging pins 52a are projected from the upper surface of the ceiling wall 52 at equal intervals in the circumferential direction.
  • a first spring support portion 56 is provided at the bottom of the subfloat accommodating recess 55.
  • An annular protrusion-shaped spring support seat 56a projects from the upper surface of the first spring support portion 56 (see FIG. 3). Further, as shown in FIG. 3, the lower end of the urging spring S1 abuts on the upper surface of the first spring supporting portion 56, and the urging spring S1 is supported.
  • the upper end of the urging spring S2 housed in the spring accommodating recess 54 abuts on the lower surface of the first spring supporting portion 56, and the urging spring S2 is supported. That is, as shown in FIG. 3, an urging spring S2 is interposed between the main float 50 and the lower cap 30 in a compressed state, and the urging spring S2 imparts an upward urging force to the main float 50. It is supposed to be done.
  • main float 50 has a sub-float holding portion 60 that holds the sub-float 70 in place.
  • the subfloat holding portion 60 is located above the subfloat 70 from a plurality of ribs 63 arranged apart from each other along the outer circumference of the subfloat 70. It has a pressing portion 65 that protrudes in such a manner and presses the sub-float 70.
  • the sub-float holding portion 60 of this embodiment has a base portion 61 having a substantially annular plate shape so as to fit into the ceiling wall 52 of the main float 50.
  • a circular subfloat insertion hole 61a is formed in the radial center portion of the base portion 61.
  • a subfloat 70 is inserted into the subfloat insertion hole 61a (see FIG. 3).
  • a plurality of ribs 63 having a substantially triangular plate shape are erected radially from the radial center of the main float 50 on the peripheral edge of the subfloat insertion hole 61a.
  • a pressing portion 65 projects from the upper end portion of each rib 63 toward the radial center of the main float 50.
  • the inner peripheral 65a and the outer peripheral 65b of each holding portion 65 have an arcuate curved surface, and the side portions 65c and 65c have a tapered surface shape that gradually narrows toward the radial center of the main float 50.
  • a gap K is defined in a portion of each pressing portion 65 surrounded by the inner circumference 65a.
  • an engagement hole 61b is formed between the ribs 63 and 63 adjacent to each other in the circumferential direction of the base portion 61.
  • the sub-float 70 has a second spring support portion 73 that supports the upper end of the sub-float urging spring S1 and a seal portion that is in contact with and separated from the opening 23.
  • the sub-float 70 in this embodiment includes a sub-float main body 71 having a second spring support portion 73, a seat valve 80 forming a seal portion and swingably mounted above the sub-float main body 71, and a sub-float.
  • the seat valve 80 is held in place of the main body 71 to prevent it from coming off, and has a seat valve holding portion 85 having an insertion hole 86a.
  • the sub-float main body 71 includes a peripheral wall portion 72 extending at a predetermined length and a second spring support portion 73 having a substantially disk shape arranged in the middle of the peripheral wall portion 72 in the axial direction. have.
  • Locking grooves 72a and 72a are formed along the axial direction at two locations facing the peripheral wall portion 72 in the circumferential direction.
  • notches 72b, 72b are formed at positions of the peripheral wall portion 72 orthogonal to the pair of locking grooves 72a, 72a.
  • a spring insertion hole 71c is formed on the lower end side of the peripheral wall portion 72 (see FIG. 3) so that the urging spring S1 can be inserted.
  • the second spring support portion 73 forms the "spring support portion that supports the upper end of the subfloat urging spring" in the present invention.
  • the subfloat 70 is supported only by the urging spring S1 via the second spring support portion 73.
  • a curved seat valve support protrusion 73a is projected from the center of the upper surface of the second spring support portion 73.
  • the disc-shaped seat valve 80 is swingably supported by the seat valve support protrusion 73a.
  • the seat valve holding portion 85 faces downward from an annular presser portion 86 having a circular insertion hole 86a and an outer peripheral edge portion at a position facing the presser portion 86 in the circumferential direction.
  • a pair of locking pieces 87 and 87 are extended, respectively.
  • the inner diameter of the insertion hole 86a is smaller than the outer diameter of the seat valve 80 and larger than the outer diameter of the valve seat 23a.
  • a locking protrusion 87a is projected from the inside of the tip of each locking piece 87 in the extending direction.
  • the pair of locking pieces 87, 87 are inserted into the pair of locking grooves 72a, 72a to form the locking protrusions 87a, 87a.
  • the subfloat 70 can be assembled with the seat valve 80 arranged between the subfloat main body 71 and the seat valve holding portion 85. It has become.
  • float valve 40 can be assembled, for example, as follows.
  • the subfloat 70 is placed in the subfloat accommodating recess 55 in a state where the lower end of the first urging spring S1 is in contact with and supported by the upper surface of the first spring support portion 56 of the subfloat accommodating recess 55 of the main float 50.
  • the subfloat 70 is supported by the urging spring S1 by mounting the second spring supporting portion 73 on the upper end of the first urging spring S1.
  • the base 61 of the sub-float holding portion 60 is placed on the ceiling wall 52 of the main float 50, and the plurality of engaging pins 52a on the ceiling wall 52 side are provided with the corresponding plurality of engaging holes on the base 61 side.
  • the sub-float holding portion 60 is mounted above the main float 50 in a retaining state, and the float valve 40 is assembled as shown in FIG.
  • the plurality of pressing portions 65 of the sub-float holding portion 60 are arranged above the pressing portions 86 of the seat valve holding portion 85 of the sub-float 70, and the sub-float 70 has the sub-float accommodating recess 55 and the sub-float. It is designed so that it can be raised and lowered between the holding portions 60 to prevent it from coming off.
  • the sub-float 70 is supported so that its second spring support portion 73 is placed on the upper end of the urging spring S1 and is separated from the first spring support portion 56 of the main float 50 (FIG. FIG. 3). Further, as shown in FIG.
  • the subfloat 70 in the above state, the subfloat 70 is urged upward with respect to the main float 50 by the urging spring S1, and the holding portion of the seat valve holding portion 85 of the subfloat 70 is always held.
  • the 86 comes into contact with the lower surfaces of the plurality of pressing portions 65 of the subfloat holding portion 60. Further, in the state shown in FIG. 3, the seat valve 80 is separated from the valve seat 23a, and the opening 23 is open.
  • the urging spring S1 is used as shown by the arrow F1 in FIG.
  • the main float 50 can be moved further upward with respect to the sub float 70 (see FIG. 10).
  • the fuel is immersed in the main float 50, the main float 50 is submerged, the float valve 40 rises, the seat valve 80 in the subfloat 70 abuts on the valve seat 23a, and the opening 23
  • a gap G is formed between the upper portion of the float valve 40 (here, the holding portion 65 of the sub-float holding portion 60) and the lower surface of the partition wall 22 in the closed state.
  • the main float 50 compresses the urging spring S1 and can move further upward with respect to the subfloat 70 (see FIG. 10). Further, as shown by the arrow F2 in FIG. 10, the main float 50 is also movable downward with respect to the sub float 70.
  • the shapes and structures of the housing, main float, and sub float described above are not limited to the above aspects.
  • the urging spring for the sub-float and the urging spring for the main float may be a leaf spring or the like instead of the coil spring, and may be used as long as the sub-float or the main float can be urged upward.
  • the vehicle turns a curve, runs on an uneven road or a slope, or falls down due to an accident, and the fuel in the fuel tank violently swings and the fuel liquid level rises.
  • the entire float valve 40 rises due to the buoyancy of the main float 50 itself and the urging force of the urging spring S2.
  • the valve seat 23a has a gap K formed inside a plurality of pressing portions 65 of the subfloat holding portion 60, and an insertion hole 86a of the seat valve holding portion 85 of the subfloat 70.
  • the seat valve 80 of the subfloat 70 comes into contact with the valve seat 23a, and the opening 23 is closed.
  • the fuel in the valve chamber V is suppressed from flowing out into the ventilation chamber R through the opening 23, and the fuel leakage to the outside of the fuel tank can be suppressed.
  • vibration may act on the vehicle in a state where the main float 50 is submerged and the seat valve 80 abuts on the valve seat 23a to close the opening 23.
  • the main float 50 compresses the subfloat urging spring S1 so that the main float 50 can move further upward with respect to the subfloat 70. (See FIG. 10), such upward movement of the main float 50 can absorb the vibration of the vehicle.
  • the seat valve 80 is in contact with the valve seat 23a (that is, the opening 23 is closed by the seal portion) while absorbing the vehicle vibration by the expansion and contraction of the subfloat urging spring S1. It can be reliably maintained and fuel leakage from the opening 23 to the ventilation chamber R can be reliably suppressed.
  • the main float urging spring S2 for urging the main float 50 upward is provided, the float valve 40 is raised, and the opening 23 is closed by the subfloat 70.
  • the spring force of the urging spring S1 is set to be smaller than the value obtained by subtracting the weight of the float valve 40 from the total of the spring force of the urging spring S2 and the buoyancy of the float valve 40.
  • the main float 50 tends to rise when the main float 50 is submerged by the main float urging spring S2.
  • the float valve 40 is immersed in the fuel, buoyancy acts on the float valve 40 to increase it, and the seal portion (seat valve 80) of the subfloat 70 abuts on the opening 23 and is closed.
  • the spring force of the urging spring S1 is greater than the sum of the spring force of the urging spring S2 and the buoyancy of the float valve 40 minus the weight of the float valve 40. Since it is set to be small, the sealed portion of the subfloat 70 can be brought into contact with the opening 23 and reliably maintained in a closed state, and fuel leaks from the opening 23 to the ventilation chamber R. Can be suppressed more reliably.
  • the sub-float 70 forms a seal portion with the sub-float main body 71 having the second spring support portion 73, and the seat valve 80 is swingably placed above the sub-float main body 71.
  • the seat valve 80 is held in place of the subfloat main body 71 to prevent it from coming off, and has a seat valve holding portion 85 having an insertion hole 86a. It has a valve seat 23a that protrudes and can come into contact with the seat valve 80 through the insertion hole 86a when the float valve 40 rises.
  • the subfloat 70 has the above structure, and the valve seat 23a comes into contact with the seat valve 80 through the insertion hole 86a of the seat valve holding portion 85 when the float valve 40 is raised, so that the main float 50 is a liquid.
  • the seat valve 80 is made difficult to peel off from the valve seat 23a, and the fuel from the opening 23 to the ventilation chamber R is fueled. Leakage can be further suppressed.
  • the main float 50 has a sub-float holding portion 60 for retaining and holding the sub-float 70, and the sub-float holding portion 60 is separated along the outer periphery of the sub-float 70. It has a plurality of ribs 63 arranged above the ribs 63, and a pressing portion 65 that protrudes from each rib 63 so as to be located above the subfloat 70 and presses the subfloat 70.
  • valve device 11 to 16 show other embodiments of the valve device according to the present invention.
  • the same parts as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • the valve device 10A of this embodiment has a housing 15A and a float valve 40A, as in the embodiments shown in FIGS. 1 to 10.
  • the float valve 40A has a main float 50A, a subfloat 70, a subfloat urging spring S1 (urging spring S1), and a main float urging spring S2 (urging spring S2).
  • the housing 15A has a housing body 20A, a lower cap 30A mounted below the housing body 20A, and an upper cap 35A mounted above the housing body 20.
  • the main float 50A has a sub-float holding portion 60A that holds the sub-float 70 in place.
  • the housing body 20A is provided with a shelf-shaped wall 24 at a position closer to the upper side of the peripheral wall 21, and a vertical wall 29 is erected from the peripheral edge of the shelf-shaped wall 24.
  • the partition wall 22 is arranged above.
  • the standing wall 29 is arranged on the opposite side of the first arc-shaped wall 29 réelle having an arc shape having a predetermined outer diameter and the first arc-shaped wall 29 réelle, and has an arc shape having a larger diameter than the first arc-shaped wall 29 réelle. It has a second arcuate wall 29b.
  • a large space A (see FIGS. 13 and 14) is defined above the housing body 20A by the second arcuate wall 29b of the standing wall 29 and the partition wall 22.
  • the flange portion 21c projects from the upper outer periphery of the peripheral wall 21.
  • a ring mounting groove 21d is formed inside the flange portion 21c, and an annular seal ring 21e is mounted in the ring mounting groove 21d.
  • a plurality of locking claws 21f are projected from the peripheral wall 21 at a position below the flange portion 21c.
  • the upper cap 35A is a substantially hat composed of a peripheral wall 36 having a substantially circular outer circumference, a ceiling wall 37 arranged above the peripheral wall 36, and a flange portion 38 extending outward from the lower side of the peripheral wall 36. It is in the shape.
  • a vent (not shown) is formed on the peripheral wall 36, and the connecting pipe 26 extends in the outer diameter direction from the front peripheral edge thereof. Further, a plurality of locking pieces (not shown) are vertically hung from a predetermined position in the circumferential direction of the flange portion 38.
  • the seal ring 21e mounted on the ring mounting groove 21d is placed on the inner circumference of the peripheral wall 36 of the upper cap 35A.
  • the upper cap 35A is mounted above the housing body 20A in the abutted state (see FIG. 12).
  • a ventilation chamber R communicating with the outside of the fuel tank is formed above the partition wall 22 (see FIG. 14).
  • the housing 15A has a tubular valve seat 23b that protrudes downward from the back peripheral edge of the opening 23 of the partition wall 22 of the housing body 20A. ing. As shown in FIG. 14, the tubular valve seat 23b extends to a length that allows it to be inserted into the subfloat holding portion 60A in a state where the main float 50A is not immersed in the fuel. The lower end of the tubular valve seat 23b in this embodiment extends by a length extending to the intermediate portion in the thickness direction of the holding portion 65A of the subfloat holding portion 60A (see FIG. 14).
  • the sub-float 70 has a sub-float main body 71 having a second spring support portion 73 and a seat valve 80 which has a seal portion and is oscillatedly placed above the sub-float 70 (here, the sub-float main body 71). And a seat valve holding portion 85 for holding the seat valve 80 with respect to the subfloat main body 71. Further, the seat valve holding portion 85 has an insertion hole 86a through which the tubular valve seat 23b is inserted.
  • a plurality of engaging protrusions 51c are projected from the outer periphery of the upper end portion of the substantially cylindrical peripheral wall 51 of the main float 50A at equal intervals in the circumferential direction.
  • the peripheral wall 51 has a tapered shape in which the upper portion thereof is formed with a constant outer diameter, while the diameter gradually increases from the lower end to the lowermost end of the constant outer diameter portion.
  • a plurality of guide ribs 51a having ridges are provided on the outer periphery of the tapered portion of the peripheral wall 51 at equal intervals in the circumferential direction.
  • the main float 50A has a subfloat holding portion 60A that holds the subfloat 70 in place, and the subfloat holding portion 60A is located above the subfloat 70. It has a pressing portion 65A for pressing the sub-float 70. Further, as shown in FIGS. 13 and 14, the subfloat holding portion 60A is located above the insertion hole 86 réelle and has an insertion opening 65e through which the cylindrical valve seat 23b is inserted.
  • the sub-float holding portion 60A in this embodiment has a substantially annular plate-shaped base portion 61 having a sub-float insertion hole 61a (see FIG. 14) provided in the radial center portion, and the base portion 61. It has a peripheral wall 62 that hangs downward from the outer peripheral edge of the wall. Above the peripheral wall 62, a plurality of engaging holes 62a are formed at equal intervals in the circumferential direction. By engaging the corresponding engaging projection 51c of the main float 50A with these engaging holes 62a, the sub-float holding portion 60A is mounted above the main float 50A in a retaining state (see FIG. 13).
  • a plurality of long plate-shaped ribs 63A are vertically provided at equal intervals in the circumferential direction from the peripheral edge of the subfloat insertion hole 61a.
  • the ribs 63A and 63A adjacent to each other in the circumferential direction are connected to each other by an arcuate wall 64, and the entire rib 63A is reinforced.
  • each rib 63A the pressing portion 65A projects toward the radial center of the main float 50A.
  • the inner peripheral 65a and the outer peripheral 65b form an arcuate curved surface
  • the both side portions 65c and 65c form the main float 50, as in the embodiment shown in FIGS. 1 to 10. It has a tapered surface that gradually narrows toward the center in the radial direction.
  • the tip portion 65d (the end portion of the main float 50A facing the radial center side) of each holding portion 65A is stretched in the inner diameter direction from the insertion hole 86a of the seat valve holding portion 65. It extends toward the tubular valve seat 23b so as to come out.
  • an insertion opening 65e through which the tubular valve seat 23b is inserted is formed in a portion surrounded by the inner circumference of the tip portion 65d of each pressing portion 65A.
  • the edge portion of the insertion opening 65e (the inner peripheral edge portion arranged along the inner peripheral surface of the insertion opening 65e) is the edge portion (insertion) of the insertion hole 86 réelle provided in the seat valve holding portion 85. It extends toward the tubular valve seat 23b so as to project in the inner diameter direction from the inner peripheral edge portion arranged along the inner peripheral surface of the hole 86 réelle.
  • a protrusion 66 projecting in the axial direction of the tubular valve seat 23b is provided at the edge of the insertion opening 65e.
  • the protrusion 66 is an inner peripheral edge portion of the insertion opening 65e from the upper surface side of the presser portion 65A along the axial direction of the tubular valve seat 23b. It stands out.
  • the tubular valve seat 23b is inserted into the subfloat holding portion 60A in a state where the main float 50A is not immersed in the fuel, and the tubular shape is formed.
  • the valve seat 23b and the sub-float holding portion 60A form a first elevating guide above the float valve 40A, and the lower outer circumference of the main float 50A and the inner circumference of the housing 15A lower the float valve 40A.
  • 2 Lifting guides are configured.
  • the above-mentioned elevating guide means a guide when the float valve 40 ⁇ moves up and down in the valve chamber V due to the fluctuation of the fuel liquid level in the valve chamber V (FIGS. 15 and 16). See the up and down arrows).
  • the insertion opening 65e protruding in the inner diameter direction from the edge of the insertion hole 86 originates the tubular valve seat 23b. That is, as shown in FIGS. 13 and 14, a tubular valve seat 23b protruding downward from the partition wall 22 of the housing body 20A is inserted and arranged inside the insertion opening 65e provided in the subfloat holding portion 60A. Then, the first elevating guide of the float valve 40A is configured by these.
  • the outer circumference of the guide rib 51a of the main float 50A is arranged on the inner circumference of the peripheral wall 21 of the housing body 20A constituting the housing 15A, whereby the second elevating guide of the float valve 40A is configured.
  • the first elevating guide and the second elevating guide are configured in the same manner as in the embodiments shown in FIGS. 11 to 16 (see FIG. 3).
  • the spring force of the urging spring S1 is increased in a state where the float valve 40A is raised and the opening 23 is closed by the subfloat 70.
  • the value obtained by subtracting the weight of the float valve 40A from the total of the spring force of the urging spring S2 and the buoyancy of the float valve 40A is set to be smaller.
  • the main float 50A is immersed in the fuel and submerged as the vehicle travels on an uneven road, a slope, or the like from the state shown in FIG.
  • the entire float valve 40A rises, as shown in FIG. 15, the lower end portion of the tubular valve seat 23b passes between the tip portions 65d of the plurality of holding portions 65A and the insertion hole 86a of the seat valve holding portion 85A. Then, it comes into contact with the seat valve 80 and the opening 23 is closed.
  • the fuel in the valve chamber V is suppressed from flowing out into the ventilation chamber R through the opening 23, and the fuel leakage to the outside of the fuel tank can be suppressed. Further, in the state shown in FIG.
  • the main float 50A compresses the urging spring S1 and can move further upward with respect to the subfloat 70 (see FIG. 16). ), Can absorb the vibration of the vehicle. In this way, while absorbing the vehicle vibration by the expansion and contraction of the urging spring S1, the state in which the seat valve 80 is in contact with the tubular valve seat 23b is surely maintained, and the ventilation chamber R from the opening 23 is reached. Fuel leakage can be reliably suppressed.
  • the float valve 40A rises and the opening 23 is closed by the subfloat 70, and the spring force of the urging spring S1 is the spring force of the urging spring S2 and the float valve 40A. Since it is set to be smaller than the value obtained by subtracting the weight of the float valve 40A from the total of the buoyancy of the subfloat 70, the seal portion (seat valve 80) of the subfloat 70 abuts on the opening 23 and is closed. In this state, when the vehicle vibrates, the seat valve 80 can be brought into contact with the opening 23 to be reliably maintained in a closed state, and fuel leakage from the opening 23 to the ventilation chamber R is more reliable. Can be suppressed.
  • the tubular valve seat 23b is inserted into the sub-float holding portion 60A in a state where the main float 50A is not immersed in the fuel, and the tubular shape is formed.
  • the valve seat 23b and the subfloat holding portion 60A form a first elevating guide above the float valve 40A, and the lower part of the main float 50A and the inner circumference of the housing 15A provide a second lower part below the float valve 40A.
  • An elevating guide is configured.
  • the raising and lowering operation of the float valve 40A is guided by the two raising and lowering guides above and below the float valve 40, the guideability when raising and lowering the float valve 40A can be improved, and the seal portion (here, the seat).
  • the valve 80) can be brought into contact with the opening 23 in a stable posture.
  • the degree of freedom of the inner peripheral shape of the housing 15A can be increased. Therefore, since it is not necessary to separately provide a guide structure for the float valve 40A at an outer position above the float valve 40A, a large space A (see FIG. 14) as shown in FIG. 14 is provided above the inside of the housing 15A. Can be formed. Since this space A can function as a space (steam reservoir) in which fuel vapor is accumulated, it contributes to suppressing fuel leakage to the ventilation chamber R.
  • the subfloat 70 has a seat valve holding portion 85A which forms a sealing portion and holds the seat valve 80 placed above the subfloat 70 by preventing it from coming off, and has a seat valve.
  • the holding portion 85A has an insertion hole 86 réelle through which the tubular valve seat 23b is inserted, and the subfloat holding portion 60A is located above the insertion hole 86 réelle and is inserted through the tubular valve seat 23b. It has an opening 65e, and the edge of the insertion opening 65e extends toward the tubular valve seat 23b so as to project in the inner diameter direction from the edge of the insertion hole 86 réelle, and has a tubular shape with the insertion opening 65e.
  • the valve seat 23b constitutes the first elevating guide (see FIG. 14).
  • the edge portion of the insertion opening 65e forming the first elevating guide is directed toward the tubular valve seat 23b so as to project in the inner diameter direction from the edge portion of the insertion hole 86 réelle. It is possible to prevent the lower end portion of the tubular valve seat 23b, which also serves as the first elevating guide, from coming into contact with the insertion hole 86 réelle of the seat valve holding portion 85A. As a result, the raising / lowering guide of the float valve 40A above the float valve 40A by the first raising / lowering guide including the insertion opening 65e and the tubular valve seat 23b can be performed more reliably.
  • a protrusion 66 protruding in the axial direction of the tubular valve seat 23b is provided at the edge of the insertion opening 65e.
  • the protrusion 66 protruding in the axial direction of the tubular valve seat 23b is provided at the edge of the insertion opening 65e, the main float 50A is not immersed in the fuel. 1 It is possible to secure a long axial length (length along the axial direction of the tubular valve seat 23b) of the insertion opening 65e forming the elevating guide, and the first elevating guide including the insertion opening 65e and the tubular valve seat 23b. The lifting guide of the float valve 40A above the float valve 40A can be performed more reliably.
  • valve device When the valve device was set in the fuel tank and a vibration test was conducted, it was tested how much fuel leaked from the opening.
  • valve device of the embodiment Similar to the valve device shown in FIGS. 1 to 10, the valve device of the embodiment provided with a housing, a float valve composed of a main float and a sub float, and the like was manufactured.
  • Comparative example A comparative valve device was manufactured with a float valve having no main float or subfloat.
  • Test method The valve devices of the above-mentioned Examples and Comparative Examples were attached, and a test tank in which a predetermined amount of liquid flowed into the inside was set in a well-known vibration test device to vibrate in the vertical direction. The amount of liquid leaking from the opening (ml / min) at that time was measured.
  • the test conditions are an acceleration of 5 G, a frequency of 28.8 Hz, and an amplitude of 1.5 mm.
  • the measurement was performed in two patterns when the pressure was applied to a predetermined pressure (4.9 kPa), and each pattern was measured three times. The results are shown in Table 1 below.
  • valve device of the example has a smaller amount of liquid leakage from the opening than the valve device of the comparative example in both the case where the tank internal pressure is atmospheric pressure and the case where the pressure is 4.9 kPa. rice field.

Landscapes

  • 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)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Safety Valves (AREA)
PCT/JP2021/041933 2020-12-22 2021-11-15 弁装置 Ceased WO2022137887A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180084767.5A CN116761734B (zh) 2020-12-22 2021-11-15 阀装置
JP2022571956A JP7387919B2 (ja) 2020-12-22 2021-11-15 弁装置
US18/267,663 US12103380B2 (en) 2020-12-22 2021-11-15 Valve device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-212834 2020-12-22
JP2020212834 2020-12-22

Publications (1)

Publication Number Publication Date
WO2022137887A1 true WO2022137887A1 (ja) 2022-06-30

Family

ID=82158985

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/041933 Ceased WO2022137887A1 (ja) 2020-12-22 2021-11-15 弁装置

Country Status (4)

Country Link
US (1) US12103380B2 (https=)
JP (1) JP7387919B2 (https=)
CN (1) CN116761734B (https=)
WO (1) WO2022137887A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116745516A (zh) * 2021-02-02 2023-09-12 百乐仕株式会社 阀装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4753262A (en) * 1987-02-06 1988-06-28 G.T. Products, Inc. Fuel system vent valve having roll-over closure with improved re-opening action for venting
JP2007153182A (ja) * 2005-12-07 2007-06-21 Piolax Inc 燃料漏れ防止弁
JP2009168045A (ja) * 2008-01-10 2009-07-30 Piolax Inc フロート弁装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060000091A1 (en) * 2004-07-02 2006-01-05 Eaton Corporation Rapid response fuel tank rollover/vent valve
JP2006234159A (ja) * 2004-11-24 2006-09-07 Toyoda Gosei Co Ltd 燃料遮断弁
US7717126B2 (en) 2005-07-08 2010-05-18 Kyosan Denki Co., Ltd. Float valve structure
JP4536611B2 (ja) 2005-07-08 2010-09-01 京三電機株式会社 シングルシール構造のフロートバルブ開弁構造
JP5123837B2 (ja) * 2008-12-15 2013-01-23 株式会社パイオラックス フロート弁装置
JP5437784B2 (ja) * 2009-12-17 2014-03-12 株式会社ニフコ 燃料タンク用弁装置
JP5786788B2 (ja) * 2011-09-26 2015-09-30 京三電機株式会社 満タン制御弁装置
EP2850350B1 (en) 2012-12-24 2017-12-13 Eaton Corporation Vale assembly for a tank
EP3183136B1 (en) * 2014-08-19 2019-11-13 Eaton Corporation Weighted flapper and splined orifice plate for vent valve
JP6488121B2 (ja) * 2014-12-18 2019-03-20 株式会社パイオラックス 燃料タンク用弁装置
JP2017202804A (ja) * 2016-05-13 2017-11-16 京三電機株式会社 燃料タンク用フロート弁、およびその製造方法
US20190210456A1 (en) * 2016-06-24 2019-07-11 Eaton Intelligent Power Limited Valve assembly
JP6765937B2 (ja) * 2016-11-04 2020-10-07 株式会社パイオラックス 燃料タンク用弁装置
KR102640273B1 (ko) * 2018-04-11 2024-02-27 가부시키가이샤 파이오락꾸스 밸브 장치
US11186166B2 (en) * 2018-09-27 2021-11-30 Kyosan Denki Co., Ltd. Fuel tank ventilation valve
WO2020105541A1 (ja) * 2018-11-20 2020-05-28 株式会社パイオラックス 弁装置
JP7707052B2 (ja) * 2021-12-21 2025-07-14 株式会社パイオラックス 弁装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4753262A (en) * 1987-02-06 1988-06-28 G.T. Products, Inc. Fuel system vent valve having roll-over closure with improved re-opening action for venting
JP2007153182A (ja) * 2005-12-07 2007-06-21 Piolax Inc 燃料漏れ防止弁
JP2009168045A (ja) * 2008-01-10 2009-07-30 Piolax Inc フロート弁装置

Also Published As

Publication number Publication date
US20240100939A1 (en) 2024-03-28
JP7387919B2 (ja) 2023-11-28
CN116761734A (zh) 2023-09-15
JPWO2022137887A1 (https=) 2022-06-30
CN116761734B (zh) 2026-03-13
US12103380B2 (en) 2024-10-01

Similar Documents

Publication Publication Date Title
JP5437784B2 (ja) 燃料タンク用弁装置
JP5265262B2 (ja) フロート弁装置
JP5085347B2 (ja) チェックバルブ一体型カットバルブ
JP7049483B2 (ja) 弁装置
WO2022137887A1 (ja) 弁装置
JP7010651B2 (ja) 燃料タンク用弁装置
JP2004044431A (ja) 燃料タンクの圧力調整バルブ
JP2012071639A (ja) 燃料遮断弁
JP5785053B2 (ja) 弁装置
US20040011400A1 (en) Pressure control valve for fuel tank
JP5123816B2 (ja) フロート弁装置
JP7115890B2 (ja) 弁装置
JPWO2020100751A1 (ja) 弁装置
JP7442698B2 (ja) 弁装置
JP6070453B2 (ja) 燃料遮断装置
JP5996641B2 (ja) フロート弁装置
JP6765937B2 (ja) 燃料タンク用弁装置
JP7340038B2 (ja) 弁装置
JP7076573B2 (ja) チェックバルブ付き気液分離装置
JP2009236289A (ja) 防振装置
JP2022074914A (ja) 弁装置
JP4819660B2 (ja) リリーフバルブ
JP4635886B2 (ja) 燃料遮断弁
JP6196520B2 (ja) 燃料流出防止弁
JP2010276189A (ja) 防振装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21910040

Country of ref document: EP

Kind code of ref document: A1

DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 2022571956

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 18267663

Country of ref document: US

Ref document number: 202180084767.5

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21910040

Country of ref document: EP

Kind code of ref document: A1