WO2013069239A1 - 燃料タンクの排気弁装置 - Google Patents
燃料タンクの排気弁装置 Download PDFInfo
- Publication number
- WO2013069239A1 WO2013069239A1 PCT/JP2012/007046 JP2012007046W WO2013069239A1 WO 2013069239 A1 WO2013069239 A1 WO 2013069239A1 JP 2012007046 W JP2012007046 W JP 2012007046W WO 2013069239 A1 WO2013069239 A1 WO 2013069239A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hole
- exhaust
- fuel tank
- chamber
- casing
- Prior art date
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0872—Details of the fuel vapour pipes or conduits
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- 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
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- 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
- B60K2015/03542—Mounting of the venting means
Definitions
- the present invention relates to an exhaust valve device for a fuel tank, and more particularly to a valve device for closing an exhaust passage in accordance with the fuel level in the fuel tank.
- the exhaust valve device includes a float valve that moves up and down in accordance with the liquid level of the liquid fuel.
- the float valve is positioned below in the exhaust valve device and opens a passage when the fuel level is low. Thereby, the gas (including air and fuel vapor) in the fuel tank can flow out to the canister provided outside the tank through the exhaust valve device.
- the float valve receives buoyancy from the fuel and moves up in the exhaust valve device to close the passage. Thereby, it is suppressed that liquid fuel leaks outside through the exhaust valve device.
- the liquid fuel passes through the passage before the float valve rises and closes the passage.
- a barrier for preventing the flow of liquid fuel is provided in a portion downstream (outside of the fuel tank) of the passage that is blocked by the float valve.
- the exhaust valve device according to Patent Document 1 has a cylindrical shape extending in the vertical direction, and the internal passage is partitioned into an upper chamber and a lower chamber by a partition wall. An exhaust port communicating with the outside is provided on the side of the upper chamber.
- a through-hole that communicates the upper chamber and the lower chamber is formed in the center of the partition wall.
- a cylindrical barrier is provided so as to surround the through hole, leaving the side opposite to the exhaust port side.
- the present invention has been made in view of the above background, and in an exhaust valve device for a fuel tank, without causing an increase in the size of the device, while allowing gas to flow smoothly, suppressing leakage of liquid fuel. Is an issue.
- the present invention is provided so as to penetrate the upper wall (101) of the fuel tank (100), and the interior of the upper chamber (41) is provided by a partition wall (35) having a through hole (36). And a casing (2, 3, 4) partitioned into a lower chamber (42), an inflow hole (54) communicating the lower chamber and the inside of the fuel tank, a side portion of the upper chamber and the fuel An exhaust hole (20) communicating with the outside of the tank, and supported by the lower chamber so as to be displaceable. The exhaust hole passes through the inflow hole and rises in response to buoyancy from the fuel flowing into the lower chamber.
- a fuel tank exhaust valve device (1) having a closed float valve (5), wherein a portion of the casing defining the upper chamber closes the cylindrical portion (11) and the upper end of the cylindrical portion. And the exhaust hole is formed in the cylindrical portion. And a cylindrical body (37) having a closed upper portion so as to cover the through hole is provided on the side of the upper chamber of the partition wall and is substantially coaxial with the cylindrical portion, and between the cylindrical body and the partition wall.
- a buffer chamber (38) is defined, and the buffer chamber communicates with the lower chamber through the through-hole, and the buffer chamber and the upper chamber are disposed on a side wall opposite to the exhaust hole side of the cylindrical body.
- a first vent hole (43) communicating with the inner peripheral surface of the cylindrical portion and a lower surface of the disc is formed at the boundary between the inner peripheral surface of the cylindrical portion and the lower surface of the disc.
- a curved corner (13) that is smoothly continuous is extended, and the curvature of the corner is the smallest on the side opposite to the side where the exhaust hole is formed, and the exhaust hole is formed in the circumferential direction. It is characterized by increasing gradually as it goes to the side.
- the curvature of the corner portion of the portion facing the first vent hole is reduced, the gas flowing through the first vent hole and flowing into the upper chamber can easily flow along the corner portion. That is, at the portion facing the first vent hole at the corner, the gas flow is less likely to be hindered and less likely to stay, and the pressure drop is suppressed.
- the curvature of the corner is reduced on the side opposite to the exhaust port (the side facing the first vent hole) and increased on the exhaust port side. An area can be secured.
- Another aspect of the present invention is characterized in that a second ventilation hole (44) having an opening area smaller than that of the first ventilation hole is formed in the side wall on the exhaust hole side of the cylindrical body.
- the gas flows through the second vent hole in addition to the first vent hole, the pressure loss of the gas can be reduced. Further, since the opening area of the second vent hole is smaller than that of the first vent hole, the gas mainly flows from the first vent hole and flows auxiliaryly from the second vent hole.
- Another aspect of the present invention is the upper chamber side portion of the partition wall, and a portion located between the second vent hole and the exhaust hole has a baffle wall (facing the second vent hole). 46) is protrudingly provided.
- the flow of liquid fuel from the second vent hole to the exhaust hole can be suppressed by the baffle wall.
- the portion of the partition on the upper chamber side is formed in a conical surface shape in which the portion provided with the through hole is recessed toward the lower chamber.
- liquid fuel that has unintentionally flowed into the upper chamber can be guided to the through hole side and returned to the lower chamber.
- the gas in the exhaust valve device of the fuel tank, the gas can be smoothly circulated without increasing the size of the device, and the leakage of the liquid fuel can be suppressed.
- FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
- FIG. 4 is a sectional view taken along line IV-IV in FIG.
- Perspective view of first casing Perspective view of second casing Perspective view of third casing Plan view of the third casing IX-IX cross section of Fig. 8 (A) Schematic diagram showing a cross section of the upper chamber, (B) (A) BB cross section, (C) (A) CC cross section, (D) (A) DD cross section Figure
- the vertical direction (vertical direction) is determined based on the coordinates shown in the figure.
- the exhaust valve device 1 is configured by combining a first casing 2, a second casing 3, a third casing 4, and a float valve 5.
- the first casing 2 is formed by integrally molding a first resin that can be heat-welded and a hydrocarbon-impermeable second resin by a two-color molding method.
- the first resin is, for example, high density polyethylene (HDPE)
- the second material is, for example, an ethylene-vinyl alcohol copolymer.
- the first casing 2 has a cylindrical portion 11 whose axis extends in the vertical direction. The upper end of the cylindrical portion 11 is closed by a disc 12 orthogonal to the axis of the cylindrical portion 11, while the lower end is open. At the boundary between the inner peripheral surface of the cylindrical portion 11 and the lower surface of the disc 12, a corner portion 13 extends along the boundary.
- the inner surface of the corner portion 13 is a curved surface that smoothly continues the inner peripheral surface of the cylindrical portion 11 and the lower surface of the disk 12. As shown in FIGS. 3 and 4, the shape of the inner surface in the cross section of the corner 13 is a 90 ° arc.
- the curvature of the corner 13 changes in the circumferential direction of the cylindrical portion 11.
- the upper edge of the corner portion 13 is a boundary with the lower surface of the disc 12, and the position of the cylindrical portion 11 in the axial direction is constant at each portion in the circumferential direction of the cylindrical portion 11.
- the lower edge 14 of the corner portion 13 (that is, the boundary between the corner portion 13 and the cylindrical portion 11) 14 is changed in position in the axial direction of the cylindrical portion 11 at each portion in the circumferential direction of the cylindrical portion 11.
- the boundary between the outer peripheral surface of the cylindrical portion 11, the disc 12, and the upper surface is a curved surface that is chamfered.
- a circular flange 15 protruding outward in the radial direction is formed at an intermediate portion in the longitudinal direction of the outer peripheral surface of the cylindrical portion 11.
- a wall 16 protrudes downward.
- the wall portion 16 is formed in an annular shape along the peripheral edge portion of the flange 15, and the lower end thereof is a joining surface 17 that is a flat surface facing downward.
- a cylindrical exhaust pipe 18 protruding outward in the radial direction is provided at a portion above the flange 15 of the cylindrical portion 11.
- the base end of the exhaust port 20 formed by the inner hole of the exhaust pipe 18 communicates with the inside of the cylindrical portion 11.
- the upper edge of the base end of the exhaust port 20 is disposed at a position offset downward from the upper end of the cylindrical portion 11, that is, the lower edge 14 of the corner portion 13.
- the base edge of the exhaust port 20 may straddle the lower edge 14 of the corner 13.
- the lower part of the base end of the exhaust pipe 18 is continuous with the upper surface of the flange 15.
- a plurality of protrusions for coupling with a hose or a hose coupler are formed on the outer peripheral surface at the tip of the exhaust pipe 18.
- the corner portion 13 has the smallest curvature on the side opposite to the exhaust port 20 in the circumferential direction (the curvature radius is large), and proceeds toward the exhaust port side along the circumferential direction. It is formed so that the curvature gradually increases.
- the radius of curvature of the corner 13 on the side opposite to the exhaust port 20 is R3, and the radius of curvature gradually decreases to R2 and R1 as the exhaust port 20 is advanced (R3> R2>). R1). Therefore, the lower edge 14 of the corner 13 is displaced upward as it proceeds from the side opposite to the exhaust port 20 to the exhaust port 20 side.
- a plurality of first casing side latching claws 19 are provided in a protruding manner on the outer peripheral surface of the portion below the flange 15 of the cylindrical portion 11.
- the 1st casing side latching claw 19 has the inclined surface which protrudes to radial direction outward as it goes upwards from a lower end, and the non-return surface which faces the upper direction continuous to the upper end of an inclined surface.
- four first casing side locking claws 19 are provided at intervals of 90 ° in the circumferential direction of the cylindrical portion 11.
- the cylindrical portion 11 is formed with slits 21 extending from the lower end upward.
- the slit 21 has an effect of releasing stress when each member constituting the exhaust valve device 1 is swollen by the fuel.
- guide ribs 22 extending in the vertical direction are provided on the outer peripheral surface of the cylindrical portion 11 so as to project at appropriate positions.
- the first resin integrally forms the outer peripheral portion of the upper portion of the cylindrical portion 11, the upper surface portion of the disk 12, the outer peripheral portion of the exhaust pipe 18, the flange 15 and the wall portion 16 (the hatched portion indicated by symbol A in FIGS. 3 and 4).
- the second resin is composed of an inner peripheral portion of the upper portion of the cylindrical portion 11, a lower portion of the cylindrical portion 11, a lower surface portion of the disk 12, an inner peripheral portion of the exhaust pipe 18, and a lower surface portion of the proximal end of the flange 15 (see FIGS. 3 and 4).
- the hatched portion indicated by the symbol B is integrally formed.
- the second casing 3 has a cylindrical portion 25.
- the cylindrical portion 25 is formed in a size that can be fitted into the cylindrical portion 11 of the first casing 2, and an upper half portion thereof is fitted into the cylindrical portion 11.
- the cylindrical part 25 of the 2nd casing 3 is arrange
- An O-ring groove 26 extending in the circumferential direction is formed on the outer peripheral surface of the cylindrical portion 25, and a flexible O-ring 27 is fitted in the O-ring groove 26.
- the O-ring 27 seals a gap between the outer peripheral surface of the cylindrical portion 25 and the inner peripheral surface of the cylindrical portion 11.
- a plurality of locking protrusions 30 protrude from the outer peripheral surface of the intermediate portion in the longitudinal direction of the cylindrical portion 25.
- four locking protrusions 30 are provided on the outer peripheral surface of the cylindrical portion 25 at equal intervals in the circumferential direction.
- the locking projection piece 30 is an L-shaped thin piece including a base portion 31 protruding radially outward from the outer peripheral surface of the cylindrical portion 25 and a peripheral wall portion 32 extending upward from the tip of the base portion 31.
- the peripheral wall portion 32 is curved in the circumferential direction of the cylindrical portion 25 so as to face the outer peripheral surface of the cylindrical portion 25 with a certain distance, and the outer surface thereof is a circumferential surface. Since the locking protrusion 30 is formed in a thin piece shape, it has flexibility, and the peripheral wall portion 32 can approach and separate from the outer peripheral surface of the cylindrical portion 25.
- the peripheral wall portion 32 is formed with a second casing side locking hole 33 penetrating in the thickness direction (the radial direction of the cylindrical portion 25).
- the second casing side locking hole 33 also extends to the base portion 31, and the hole edge reaches the outer peripheral surface of the cylindrical portion 25.
- Each locking protrusion 30 has a peripheral wall portion 32 extending on the outer peripheral surface of the cylindrical portion 11 of the first casing 2 and the first casing side locking claw 19, and the second casing side locking hole 33 is inserted into the first casing side.
- the locking claw 19 is locked.
- the base 31 of the locking protrusion 30 abuts on the lower end surface of the cylindrical portion 11.
- the second casing 3 is coupled to the first casing 2.
- a gap 34 is formed between the adjacent locking protrusions 30, and the guide rib 22 of the first casing 2 enters the gap 34, thereby the first casing 2 and the first casing 2.
- a relative rotational position with respect to the second casing 3 is determined.
- a partition wall 35 is provided at the upper end of the cylindrical portion 25.
- the partition wall 35 is formed in a conical surface shape whose central portion protrudes downward (inward of the cylindrical portion 25), and has a communication hole 36 penetrating in the thickness direction in the central portion.
- a cylindrical body 37 projects from the central portion of the upper surface of the partition wall 35 so as to surround the communication hole 36.
- the cylindrical body 37 has an axial line extending in the vertical direction, closed at the upper end, and forms a buffer chamber 38 therein.
- the internal space of the first casing 2 and the second casing 3 is located above the partition wall 35 and the space excluding the buffer chamber 38 is located below the upper chamber 41 and the partition wall 35.
- the space to be used is a lower chamber 42.
- Cylindrical body 37 is disposed at substantially the same vertical position as exhaust pipe 18.
- a first ventilation hole 43 that penetrates in the radial direction is formed on the base (lower part) of the cylindrical body 37 on the side opposite to the exhaust port 20 side in the circumferential direction, and on the side facing the exhaust port 20 side in the circumferential direction.
- a second vent hole 44 penetrating in the radial direction is formed.
- the first and second ventilation holes 43 and 44 are vertically divided into the first and second ventilation holes 43 and 44, respectively. There are struts extending in the direction.
- the first vent hole 43 and the second vent hole 44 have substantially the same width in the circumferential direction, but the first vent hole 43 extends upward from the second vent hole 44 and has a large opening area. In other embodiments, the second vent hole 44 may be omitted.
- a plurality of ribs 45 extend radially on the upper surface of the partition wall 35.
- the rib 45 reinforces the partition wall 35 and has a function of collecting small droplets of liquid (fuel) existing on the upper surface of the partition wall 35 into a large droplet and guiding it to the communication hole 36.
- a baffle wall 46 projects upward from the upper surface of the partition wall 35 so as to face the second ventilation hole 44 at a portion between the second ventilation hole 44 and the exhaust port 20. Yes.
- a notch 47 is formed on the upper surface of the partition wall 35 between the baffle wall 46 and the exhaust pipe 18. The notch 47 forms a smooth curved surface and forms a part of a passage communicating smoothly with the exhaust port 20.
- a second casing side latching claw 48 projects from the outer peripheral surface of the cylindrical portion 25 and below the latching projection piece 30.
- the 2nd casing side latching claw 48 has the inclined surface which protrudes to radial direction outward as it goes upwards from a lower end, and the non-return surface which faces the upper direction which followed the upper end of the inclined surface.
- four second casing side locking claws 48 are provided at intervals of 90 ° in the circumferential direction of the cylindrical portion 25.
- a plurality of ribs 49 projecting in the radial direction and extending in the longitudinal direction are formed on the inner peripheral surface of the cylindrical portion 25.
- the third casing 4 has a cylindrical shape with both upper and lower ends opened, and in order from the upper end, a ring portion 51, a tapered portion 52, an intermediate portion 53, and a skirt portion 54.
- the intermediate portion 53 is a cylinder having a constant diameter, and is formed in a size that allows the cylindrical portion 25 of the second casing 3 to be fitted into the inside without rattling.
- the taper portion 52 has a truncated cone shape in which the outer diameter and the inner diameter are increased in a taper shape from the upper end edge of the intermediate portion 53 upward.
- the ring portion 51 is a cylinder having a constant diameter continuous with the upper end of the tapered portion 52.
- the diameter of the ring part 51 is larger than the diameter of the upper end of the taper part 52, and a step part 55 is formed at the boundary between the ring part 51 and the taper part 52.
- the inner diameter of the ring portion 51 is formed so as to be able to contact the outer surface of the peripheral wall portion 32 of each locking projection piece 30 of the second casing 3.
- the skirt portion 54 is a cylinder that is continuous with the lower end edge of the intermediate portion 53 and has a constant diameter extending downward.
- the skirt portion 54 functions as a liquid or gas inflow hole.
- the diameter of the skirt portion 54 is smaller than the diameter of the intermediate portion 53, and step portions 56 and 57 are formed at the boundary between the skirt portion 54 and the intermediate portion 53.
- the diameter of the ring portion 51 and the diameter of the upper end of the taper portion 52 may be the same, and the step portion 55 may be omitted.
- the diameter of the skirt portion 54 and the diameter of the intermediate portion 53 may be the same.
- the step portions 56 and 57 may be omitted.
- a portion corresponding to the second casing side locking claw 48 of the intermediate portion 53 is formed with a third casing side locking hole 58 penetrating in the thickness direction (radial direction).
- four third casing side locking holes 58 are provided at intervals of 90 ° in the circumferential direction of the intermediate portion 53.
- the second casing side latching claws 48 enter the third casing side latching holes 58 and are latched respectively.
- a long hole (cut) 59 that penetrates in the thickness direction and extends in the longitudinal direction (vertical direction) is formed between two adjacent third casing side locking holes 58 of the intermediate portion 53. The upper end of the long hole 59 extends into the tapered portion 52. However, the long hole 59 does not reach the upper end edge of the third casing 4.
- the upper end of the long hole 59 is preferably disposed at the upper end of the tapered portion 52 and is not formed in the ring portion 51.
- the lower end of the long hole 59 preferably extends to the lower edge of the third casing side locking hole 58 in the longitudinal direction of the intermediate portion 53, and extends downward beyond the lower edge of the third casing side locking hole 58. It may extend.
- two long holes 59 are formed and arranged at positions that are symmetrical to each other in the circumferential direction of the third casing 4.
- a reinforcing rib 60 that protrudes from the lower edge of the intermediate portion 53 through the step portions 56 and 57 to the outer peripheral surface of the skirt portion 54 is projected. Yes.
- the reinforcing rib 60 is disposed at a position corresponding to the long hole 59 at least in the circumferential direction.
- the float support piece 61 includes a plurality of beam portions 62 extending in the radial direction from the inner peripheral surfaces of the intermediate portion 53 and the skirt portion 54, and an annular beam connecting the protruding ends of the plurality of beam portions 62. Part 63.
- the second casing 3 and the third casing 4 are joined by inserting the lower end portion of the cylindrical portion 25 of the second casing 3 to which the first casing 2 is assembled from the upper end portion (ring portion 51) side of the third casing 4. By doing.
- the second casing 3 is inserted into the third casing 4, since the inner diameter of the ring portion 51 and the taper portion 52 is larger than that of the intermediate portion 53, The portion 51 and the tapered portion 52 are not brought into contact with each other. Therefore, the insertion resistance with respect to the 3rd casing 4 of the 2nd casing 3 becomes small.
- the second casing side locking claw 48 crosses the intermediate portion 53 and the third casing side locking hole 58.
- the insertion resistance until it reaches is small.
- the insertion resistance can be arbitrarily reduced by forming the long hole 59, and the insertion operation can be performed. Can be easily.
- the number of the long holes 59, the width in the circumferential direction of the third casing 4, and the length in the longitudinal direction of the third casing 4 are changed, so that the insertion resistance of the second casing 3 with respect to the third casing 4 is arbitrarily set. You may adjust it.
- the insertion position of the second casing 3 with respect to the third casing 4 is restricted.
- the inner peripheral surface of the ring portion 51 comes into contact with the outer surfaces of the four locking protrusions 30, and the first casing 2.
- the locking protrusion 30 is sandwiched between the outer peripheral surface of the cylindrical portion 11. Thereby, the bending of the locking protrusion 30 is restricted, and the locking of the first casing side locking claw 19 to the second casing side locking hole 33 is difficult to be released. Since the ring portion 51 is formed in an annular shape and has a step portion 55 at the lower edge, it is difficult to be deformed, and the bending of the locking protrusion 30 can be reliably suppressed.
- the float valve 5 is accommodated in a space (lower chamber 42) surrounded by the cylindrical portion 25 and the partition wall 35 of the second casing 3 and the float support piece 61 of the third casing 4.
- the float valve 5 is configured by combining a float body 71, a seat 72, and a valve body 73.
- the float body 71 is provided with a cylindrical portion 75 extending in the vertical direction, a top plate 76 for closing the upper end portion of the cylindrical portion, and projecting upward from the top plate 76, and the upper end extends in the radial direction. And an enlarged head 77.
- the top plate 76 and the enlarged head portion 77 are formed with through holes (reference numerals omitted) penetrating in the vertical direction.
- the seat 72 has a disc shape and has a locking claw at the peripheral edge thereof.
- the catch 72 is supported on the upper surface of the enlarged head 77 so as to be tiltable (displaceable) with its locking claw locked to the enlarged head 77 with play.
- the valve body 73 has a disc shape, has a flexible packing 81 at the center thereof, and has a locking claw at the peripheral edge thereof.
- the valve body 73 is supported on the upper surface of the receiving seat 72 so as to be tiltable (displaceable) with its locking claw locked to the enlarged head 77 with play. Thereby, the valve body 73 is supported by the upper end of the float body 71 via the seat 72 so as to be tiltable.
- the float valve 5 is accommodated in the lower chamber 42 so as to be movable up and down.
- the posture of the float valve 5 is maintained in the lower chamber 42 by the outer peripheral surface of the float body 71 slidingly contacting the protruding ends of a plurality of ribs 49 protruding from the inner peripheral surface of the cylindrical portion 25 of the second casing 3.
- the float body 71 is in sliding contact with the rib 49, a gap is formed between the float valve 5 and the inner peripheral surface of the cylindrical portion 25.
- the valve body 73 comes into contact with the peripheral edge portion of the communication hole 36 of the partition wall 35 through the packing 81 and closes the communication hole 36.
- a compression coil spring 83 is interposed between the lower surface of the top plate 76 of the float body 71 and the float support piece 61.
- the compression coil spring 83 urges the float valve 5 upward, that is, toward the partition wall 35 side.
- the urging force of the compression coil spring 83 is set to a strength that does not allow the float valve 5 to reach the partition wall 35 in a state where fuel buoyancy is not acting on the float valve 5.
- the float body 71, the seat 72, and the valve body 73 of the second casing 3, the third casing 4, and the float valve 5 are formed by injection molding of resin, and the resin may be, for example, polyacetal.
- the exhaust valve device 1 configured as described above is inserted into and attached to a mounting hole 102 formed in the upper wall 101 of the fuel tank 100 so as to communicate the inside and the outside.
- the exhaust valve device 1 is coupled to the peripheral portion of the mounting hole 102 at the joint surface 17 of the flange 15 of the first casing.
- the joint surface 17 and the upper wall 101 are joined by heat welding, vibration welding, adhesion with an adhesive, or the like.
- the liquid level of the liquid fuel rises quickly, and when the liquid fuel or bubbles contained therein blow up and pass through the communication hole 36 before the float valve 5 closes the communication hole 36, the communication hole Most of the liquid fuel and bubbles that have passed through 36 are trapped in the buffer chamber 38. Even when liquid fuel or bubbles flow out of the buffer chamber 38, the first vent hole 43 has a larger opening area than the second vent hole 44, so that the liquid fuel or bubbles may flow from the first vent hole 43 side to the upper chamber 41. Flows out. That is, since liquid fuel or the like is guided to the side opposite to the exhaust port 20 side, the possibility that the liquid fuel or the like passes through the exhaust port 20 and flows out to the outside is reduced. Further, even if liquid fuel or the like passes through the second vent hole 44, the baffle wall 46 inhibits the flow of liquid fuel or the like to the exhaust port 20, so that outflow to the outside is suppressed.
- the float valve 5 When the liquid level of the liquid fuel in the fuel tank 100 is low and buoyancy due to the liquid fuel is not generated in the float valve 5, the float valve 5 is positioned below the lower chamber 42 as shown in FIG. It will be in the state supported by the float support piece 61 (the valve opening state of the exhaust valve apparatus 1). In this state, the gas in the fuel tank 100 enters the exhaust valve device 1 from the skirt portion 54, and the lower chamber 42, the communication hole 36, the buffer chamber 38, the first vent hole 43 or the second vent hole 44, and the upper chamber. 41 and the exhaust port 20 can be sequentially passed to the outside of the fuel tank 100.
- the first vent hole 43 has a larger opening area than the second vent hole 44, most of the gas passes through the first vent hole 43. Thus, it is guided to the side opposite to the exhaust port 20 of the upper chamber 41.
- the gas that has entered the upper chamber 41 through the first vent hole 43 flows to the inner peripheral surface of the cylindrical portion 11, the lower surface of the disk 12, and the surface side of the corner portion 13, and then the flow direction by those surfaces And flow toward the exhaust port 20 along these surfaces.
- the curvature of the corner 13 on the side opposite to the exhaust port 20 in the circumferential direction (side facing the first vent hole 43) is greater than the curvature on the exhaust port 20 side (side facing the second vent hole 44). Since the curved surface is smaller and smoother, the gas flowing from the first vent hole 43 into the upper chamber 41 can be efficiently guided to the exhaust port 20 side. That is, the pressure loss of the gas in the upper chamber 41 can be reduced and the gas can be circulated smoothly.
- the lower edge 14 of the corner 13 extends downward to reduce the volume of the upper chamber 41.
- the portion of the corner 13 on the exhaust port 20 side is reduced.
- the curvature of the portion opposite to the exhaust port 20 so as to increase the curvature
- the reduction in the volume of the upper chamber 41 can be reduced.
- the upper chamber 41 can be expanded by increasing the curvature to reduce the corner 13 and retracting it upward.
- the portion on the exhaust port 20 side of the corner 13 does not become a resistance to the gas flow compared to the portion on the side opposite to the exhaust port 20, and therefore has little influence on the gas pressure loss, and the volume of the upper chamber 41 is increased.
- the pressure loss of gas can be reduced more by enlarging a channel cross-sectional area.
Abstract
Description
Claims (4)
- 燃料タンクの上壁を貫通するように設けられ、貫通孔を有する隔壁によって内部が上部室と下部室とに区画されたケーシングと、
前記下部室と前記燃料タンクの内部とを連通する流入孔と、
前記上部室の側部と前記燃料タンクの外部とを連通する排気孔と、
前記下部室に変位可能に支持され、前記流入孔を通過して前記下部室に流入する燃料から浮力を受けて上昇し、前記貫通孔を閉塞するフロート弁と
を有する燃料タンクの排気弁装置であって、
前記ケーシングの前記上部室を画成する部分は、円筒部と前記円筒部の上端を閉塞する円板とを有し、
前記排気孔は前記円筒部に形成され、
前記隔壁の前記上部室側には、前記貫通孔を覆うように上部が閉塞された筒体が前記円筒部と概ね同軸に設けられ、前記筒体と前記隔壁との間にバッファ室が画成され、
前記バッファ室は、前記貫通孔によって前記下部室と連通し、
前記筒体の前記排気孔側と相反する側の側壁に、前記バッファ室と前記上部室とを連通する第1通気孔が形成され、
前記円筒部の内周面と前記円板の下面との境界部には、前記円筒部の内周面と前記円板の下面とを滑らかに連続させる曲面状の隅部が延設され、
前記隅部の曲率は、前記排気孔が形成された側と相反する側において最も小さく、周方向に前記排気孔が形成された側へと進むにつれて漸増することを特徴とする燃料タンクの排気弁装置。 - 前記筒体の前記排気孔側の前記側壁に、前記第1通気孔よりも開口面積が小さい第2通気孔が形成されていることを特徴とする請求項1に記載の燃料タンクの排気弁装置。
- 前記隔壁の前記上部室側部分であって、前記第2通気孔と前記排気孔との間に位置する部分には、前記第2通気孔に対向するバッフル壁が突設されていることを特徴とする請求項2に記載の燃料タンクの排気弁装置。
- 前記隔壁の前記上部室側の部分は、前記貫通孔が設けられた部分が前記下部室側に凹んだ円錐面状に形成されていることを特徴とする請求項1~請求項3のいずれか1つの項に記載の燃料タンクの排気弁装置。
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CN201280045369.3A CN103813921B (zh) | 2011-11-11 | 2012-11-02 | 燃料箱的排气阀装置 |
KR1020147006444A KR101924251B1 (ko) | 2011-11-11 | 2012-11-02 | 연료 탱크의 배기 밸브 장치 |
MX2014003833A MX349204B (es) | 2011-11-11 | 2012-11-02 | Dispositivo de la válvula de escape para tanque de combustible. |
BR112014011455-2A BR112014011455B1 (pt) | 2011-11-11 | 2012-11-02 | dispositivo de válvula de exaustão para tanque de combustível |
EP12847055.6A EP2777971B1 (en) | 2011-11-11 | 2012-11-02 | Exhaust valve device for fuel tank |
US14/347,427 US9050886B2 (en) | 2011-11-11 | 2012-11-02 | Exhaust valve device for fuel tank |
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JP (1) | JP5767946B2 (ja) |
KR (1) | KR101924251B1 (ja) |
CN (1) | CN103813921B (ja) |
BR (1) | BR112014011455B1 (ja) |
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Cited By (3)
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CN105992706A (zh) * | 2014-02-12 | 2016-10-05 | 株式会社利富高 | 阀装置 |
FR3084600A1 (fr) * | 2018-08-02 | 2020-02-07 | Sogefi Filtration | Ensemble d'insertion pour piege de vapeurs de carburant, incluant un monolithe, et procede d'assemblage d'un dispositif a monolithe d'adsorption de vapeurs |
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JP2015528090A (ja) | 2012-07-12 | 2015-09-24 | イートン コーポレーションEaton Corporation | 複数のガイド脚を備えたフラッパバルブ |
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CN106715177B (zh) * | 2014-08-19 | 2019-06-14 | 伊顿智能动力有限公司 | 用于排气阀的加重挡板和花键孔板 |
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DE112017005062T5 (de) * | 2016-11-02 | 2019-07-18 | Eaton Intelligent Power Limited | Füllbegrenzungsentlüftungsventil mit hoher Absperrhöhe |
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JP2019027352A (ja) * | 2017-07-28 | 2019-02-21 | 京三電機株式会社 | 燃料遮断弁 |
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JP6747459B2 (ja) * | 2018-01-19 | 2020-08-26 | 京三電機株式会社 | 燃料タンク用通気制御弁 |
CN109340412B (zh) * | 2018-11-27 | 2024-03-08 | 戴胜汽车科技(苏州)有限公司 | 用于汽车油箱上的带积液功能的组合阀 |
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Also Published As
Publication number | Publication date |
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EP2777971A4 (en) | 2015-08-12 |
CN103813921B (zh) | 2016-08-17 |
JP2013103561A (ja) | 2013-05-30 |
MX349204B (es) | 2017-07-18 |
BR112014011455A2 (pt) | 2017-05-09 |
US9050886B2 (en) | 2015-06-09 |
BR112014011455B1 (pt) | 2021-05-04 |
US20140224820A1 (en) | 2014-08-14 |
EP2777971B1 (en) | 2016-12-07 |
EP2777971A1 (en) | 2014-09-17 |
KR20140090973A (ko) | 2014-07-18 |
CN103813921A (zh) | 2014-05-21 |
JP5767946B2 (ja) | 2015-08-26 |
KR101924251B1 (ko) | 2018-11-30 |
MX2014003833A (es) | 2015-03-05 |
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