JP6534866B2 - Fluid storage device - Google Patents

Description

  The present invention relates to a fluid storage device in which air in a fuel tank is discharged through a breather line when fuel is supplied to the fuel tank through a filler pipe.

  According to Patent Document 1, it is possible to reduce the fuel tank weight by suppressing an excessive increase in the internal pressure of the fuel tank, and to provide a fuel tank device capable of reliably preventing overfilling. The purpose is ([0008], summary).

  In order to achieve the object, in Patent Document 1 (abstract, FIG. 1), the fuel tank device 10A includes a fuel tank 12 for storing fuel, and a fueling pipe 14 for supplying fuel from the outside to the fuel tank 12; A vapor passage 28 to which the evaporated fuel generated in the fuel tank 12 is introduced, a canister 30 for adsorbing the evaporated fuel introduced by the vapor passage 28, an outside air passage 32 for introducing the outside air to the canister 30, a canister 30 Valve which can shut off the communication between the inside of the fuel tank 12 and the outside air via the outside air passage 32 and the purge passage 34 for guiding the evaporated fuel adsorbed to the intake passage 302 of the internal combustion engine 300 together with the outside air introduced from the outside air passage. And a mechanism 18. The valve mechanism 18 shuts off the communication state only at the time of refueling.

  In the fuel tank system 10A, a breather passage 24 and a closing member 26 are provided. The breather passage 24 is in communication with the fuel tank 12 from the vicinity of one end of the fuel supply pipe 14 (FIG. 1). The closing member 26 can close the fuel supply pipe 14 in a section from the connection part of the breather passage 24 to the fuel supply port (opening on the outside air side of the fuel supply pipe 14) 14a in the fuel supply pipe 14 (the fuel supply port 14a Configured as a flap valve that covers ([0033], [0034], Figure 2). By providing the closing member 26, it is possible to prevent the fuel in the fuel tank 12 from flowing out through the fuel supply pipe 14 ([0033]).

JP, 2013-001294, A

  As described above, in Patent Document 1, the closing member 26 is provided to prevent the fuel in the fuel tank 12 from flowing out through the fuel supply pipe 14 at the time of rollover of the vehicle ([0033] ). Therefore, the closing member 26 is required to have higher pressure resistance. In addition, when the closing member 26 is provided, the configuration of the fuel supply port 14a may be complicated.

  The present invention has been made in consideration of such problems, and a fluid capable of achieving one or both of lowering the pressure resistance necessary for the member on the filler port side and simplifying the configuration on the filler port side. It aims at providing a storage device.

The fluid storage device according to the present invention is
With a fuel tank,
A filler pipe inserted into the fuel tank;
A breather line for discharging air in the fuel tank at the time of refueling;
A feed line for delivering fuel from the fuel tank to a target device;
The fluid storage device is
A refueling valve for controlling the flow of the fuel from the filler pipe to the inside of the fuel tank;
And a first rollover valve provided in the breather line.
The first rollover valve is
A cylindrical portion whose axis is disposed along the vertical direction of the vehicle;
A lower opening forming portion formed with at least one lower opening through which air in the fuel tank passes under the cylindrical portion;
An upper opening forming portion formed with at least one upper opening through which air in the fuel tank passes above the cylindrical portion;
And at least one valve body that closes the upper opening by the flow of the fuel when the vehicle rolls over.

  According to the present invention, when the vehicle rolls over, the valve body closes the upper opening due to the flow of fuel. Therefore, it is possible to prevent the fuel in the fuel tank from flowing to the filler port side via the first rollover valve at the time of rollover. Therefore, if the fuel supply valve is also closed or closed at the time of rollover, it becomes possible to lower the pressure resistance required for the member on the filler port side (for example, fuel cap) against the pressure from the fuel. . Therefore, it is possible to lower the pressure resistance of the member on the filler port side with respect to the pressure from the fuel and to improve the pressure resistance of the entire fluid storage device.

  Further, by providing the first roll over valve in the breather line, when the parts on the side of the filler opening are partially omitted, the configuration on the filler opening side can be simplified.

  The valve body may have a density higher than that of the fuel, and the at least one lower opening may be formed over an area larger than an area where the valve body can be closed. Thus, even if the air pressure in the fuel tank acts on the valve at the time of refueling, the valve does not move at all or at all. Under the present circumstances, since the lower side opening part is formed over the area | region wider than the area | region which a valve body can block, the air in a fuel tank passes a breather line through a lower side opening part, and is a filler opening. It is discharged to the side. In addition, when the density of the valve body is larger than the density of the fuel, the valve body can stably close the upper opening when the vehicle rolls over.

  The fueling valve may be, for example, a check valve or a flap valve. This makes it easy to prevent the fuel in the fuel tank from applying pressure to the member on the filler port side at the time of rollover, even on the filler pipe side.

  The valve body may be, for example, a sphere, and the upper opening may be circular. Thus, when rolling over, under pressure from the fuel, the valve body, which is a sphere, is pressed against the upper opening to close the upper opening. Therefore, it is possible to prevent the pressure from the fuel from being applied to the member on the filler port side with a simple configuration.

  The valve body as a spherical body and the upper opening as a circular shape are respectively provided, and the cylindrical portion is located in the upper opening forming portion more than the cross-sectional area at the position corresponding to the lower opening forming portion. The cross-sectional area at the corresponding position may be small. Further, the cylindrical portion is inclined from a position corresponding to the lower opening forming portion toward a position corresponding to the upper opening to guide the valve body to the upper opening at the time of rollover. A slope may be formed. Thus, at the time of rollover, the valve body, which is a spherical body, can be easily guided to the upper opening, so that the upper opening can be more reliably closed.

  A plurality of the lower openings may be provided, and an annular lower recess in which the valve body is inserted may be formed around one of the lower openings in the lower opening forming portion. As a result, at the time of refueling, air can easily pass through the breather line via the lower opening other than the lower opening at which the valve body is closed. In addition, when the valve body is displaced upward due to the pressure in the fuel tank, air can pass through the breather line even through the lower opening where the valve body is closed.

  The fluid storage device may include a vent line in which a canister for adsorbing the fuel vaporized in the fuel tank is disposed, and a second rollover valve provided in the vent line. Thus, even if the vehicle rolls over, the fuel in the fuel tank can be retained in the fuel tank by the fuel supply valve, the first rollover valve, and the second rollover valve.

  According to the present invention, it is possible to realize one or both of lowering the pressure resistance required for the member on the filler port side and simplifying the configuration of the filler port.

It is a figure showing the simple composition of the vehicles provided with the fluid storage apparatus concerning one embodiment of the present invention. It is a figure which shows the schematic structure of the said fluid storage apparatus under refueling. It is sectional drawing which shows the inside of the breather valve in the said embodiment partially. It is a figure which shows an example of the state of the fluid storage apparatus which concerns on the comparative example at the time of the rollover of the said vehicle. It is a figure which shows an example of the state of the fluid storage apparatus which concerns on the said embodiment at the time of the said rollover. It is the figure which compared the pressure of the fuel inlet vicinity, the required range of sealability of a fuel cap, and the internal pressure of a fuel tank with a comparative example and this embodiment regarding the time of the roll over.

A. One Embodiment [A1. Constitution]
(A1-1. Overall Configuration)
FIG. 1 is a view showing a simplified configuration of a vehicle 10 provided with a fluid storage device 12 according to an embodiment of the present invention. FIG. 2 is a view showing a schematic configuration of the fluid storage device 12 during refueling. The fluid storage device 12 stores a liquid that is a fuel (for example, gasoline) of the vehicle 10. The fluid storage device 12 includes a fuel tank 20 (fluid container), a fuel filling mechanism 22, a fuel supply mechanism 24, and a gas discharge mechanism 26.

(A1-2. Fuel filling mechanism 22)
(A1-2-1. Outline)
The fuel filling mechanism 22 (hereinafter also referred to as “filling mechanism 22”) is a mechanism for externally filling the fuel 300 into the fuel tank 20 (hereinafter also referred to as “tank 20”). The filling mechanism 22 has a filler pipe 30 (fluid guide portion), a fuel filling valve mechanism 32 (hereinafter also referred to as a “valve mechanism 32”), a breather line 34, and a fuel cap 36.

(A1-2-2. Filler pipe 30)
The filler pipe 30 (hereinafter also referred to as “pipe 30”) is a pipe (fuel supply pipe) inserted into the fuel tank 20. One end of the pipe 30 (hereinafter referred to as “outer end 40” or “filler port 40”) (FIG. 2) is closed by a fuel cap 36. As shown in FIG. 2, when the fuel cap 36 is removed at the time of refueling, the pipe 30 receives refueling from the refueling nozzle 42 (refueling gun). The other end (hereinafter referred to as “inner end 44”) of the pipe 30 is inserted into the tank 20 via a valve mechanism 32 which penetrates the side surface 46 (side wall) of the tank 20. As shown in FIG. 2, the outer end 40 is disposed higher than the inner end 44.

(A1-2-3. Fuel filling valve mechanism 32)
The valve mechanism 32 (fuel supply valve) is opened at the time of supply of the fuel 300 (at the time of fuel supply), passes the fuel 300 from the pipe 30 into the tank 20, and is closed at the end of the fuel supply. Further, when the vehicle 10 rolls over (turns over), the valve mechanism 32 prevents the fuel 300 in the tank 20 from flowing backward in the pipe 30. The valve mechanism 32 of the present embodiment uses a check valve.

(A1-2-4. Breather line 34)
The breather line 34 discharges the air inside the tank 20 to the outside of the tank 20 at the time of refueling. As shown in FIGS. 1 and 2, the breather line 34 includes a breather pipe 50 and a breather valve 52 (first rollover valve). One end of the breather pipe 50 is in communication with the periphery of the outer end 40 of the pipe 30. In a normal state, the breather valve 52 is open and allows air in the tank 20 (including the vaporized fuel 300) to freely pass. Further, at the time of rollover of the vehicle 10, the breather valve 52 is in the closed state, and restricts the movement of the fuel 300 toward the fuel supply port 40 side. The tip on the tank 20 side of the breather valve 52 is disposed to coincide with the liquid level 302 when full.

  FIG. 3 is a cross-sectional view partially showing the inside of the breather valve 52 in the present embodiment. As shown in FIG. 3, the breather valve 52 includes a cylindrical portion 70, a bottom member 72, and a ball 74. Note that “upper” and “lower” in FIG. 3 are based on a state in which the vehicle 10 is present on a horizontal road surface.

  The cylindrical portion 70 is a cylindrical member that functions as a communication passage when the air in the tank 20 is discharged to the fuel supply port 40 side. In addition, the cylindrical portion 70 supports the bottom member 72 and accommodates the ball 74 therein. As shown in FIG. 3, the cylindrical portion 70 has a large diameter portion 80 whose inner diameter is larger than the diameter of the ball 74, a small diameter portion 82 whose inner diameter is smaller than the diameter of the ball 74, and the large diameter portion 80 and the small diameter portion 82. And an inclined portion 84 connecting the two.

  As shown in FIG. 3, the bottom member 72 is a bottomed cylindrical member having a mounting portion 90, a lower opening forming portion 92, and a seating portion 94 (lower concave portion). The mounting portion 90 is screwed to the cylindrical portion 70 via a screw structure (not shown) to support the entire bottom member 72 on the cylindrical portion 70. From the viewpoint of being supported by the cylindrical portion 70, the mounting portion 90 may be supported by the cylindrical portion 70 by a method other than screwing. The lower opening forming portion 92 is formed with a plurality of lower openings 100 through which the air in the tank 20 passes. The seating portion 94 has a shape based on an annular shape that is inclined so as to approach the central axis Ax (axis line) of the cylindrical portion 70 toward the lower side, and supports the ball 74 from the lower side.

  The ball 74 is a resin or metal member and may be hollow. The density of the entire ball 74 is greater than the density of air in the tank 20. For this reason, the ball 74 at the normal time is located at the seating portion 94 (see the solid ball 74 in FIG. 3). In addition, the balls 74 of the present embodiment have a density greater than that of the fuel 300. Therefore, even if the air pressure Pt (hereinafter also referred to as “internal pressure Pt”) in the tank 20 rises during refueling, the ball 74 remains seated on the seating portion 94. However, as the internal pressure Pt rises, the ball 74 may rise and the lower opening 100 just below the ball 74 may open.

  In the present embodiment, the lower opening 100 other than the lower opening 100 where the ball 74 closes is present. For this reason, in a state where the balls 74 are seated on the seating portion 94, the air in the tank 20 can be moved to the filler port 40 side via the lower opening 100 thereof.

  Further, when the vehicle 10 rolls over, the ball 74 closes the upper opening 102 formed by the small diameter portion 82 of the cylindrical portion 70 by the fuel 300, gravity, etc. which enter through the lower opening 100 (see FIG. Refer to the ball 74 of the dashed-two dotted line of FIG. 3 and FIG. 5 mentioned later). Therefore, in a state where the ball 74 closes the upper opening 102, it is possible to prevent the fuel 300 from flowing into the fuel cap 36 through the breather pipe 50.

(A1-2-5. Fuel cap 36)
The fuel cap 36 closes the filling port 40 of the fluid storage device 12. In the present embodiment, the same valve mechanism (hereinafter, also referred to as “filler side valve mechanism”) as in Patent Document 1 is not present around the fuel cap 36. However, the filler port side valve mechanism may be provided. When the fuel inlet side valve mechanism is provided, the combination of the closing member 26 (flap) and the valve member 44 and the pressing member 46 of Patent Document 1 is selected between the fuel cap 36 and the junction of the filler pipe 30 and the breather pipe 50. Can be provided.

(A1-3. Fuel supply mechanism 24)
The fuel supply mechanism 24 is a mechanism for supplying the fuel 300 from the tank 20 to the engine 110 (target device, FIG. 1). The fuel supply mechanism 24 has a pump 120 and a pipe 122 (feed line). The pump 120 delivers the fuel 300 to the engine 110 through the pipe 122 based on a command from an electronic control unit (ECU) (not shown).

(A1-4. Gas discharge mechanism 26)
The gas discharge mechanism 26 (hereinafter also referred to as “vent line 26”) is a mechanism for discharging the fuel 300 (gaseous fuel) vaporized (or evaporated) inside the tank 20 from the tank 20 and delivering it to the engine 110. As shown in FIG. 1, the gas discharge mechanism 26 has a pipe 130, a rollover valve 132 (second rollover valve), a two-way valve 134, and a canister 136.

  The rollover valve 132 shuts off automatically when the vehicle 10 rolls over. The rollover valve 132 can have the same configuration as the breather valve 52 (see FIG. 3) or another configuration. The 2-way valve 134 is, for example, a mechanical valve, and controls the internal pressure Pt of the fuel tank 20 (positive pressure control) and controls the air pressure (negative pressure) when sucking the fuel 300 adsorbed by the canister 136 into the engine 110 Used for negative pressure control). The two-way valve 134 can be controlled by the ECU. The canister 136 adsorbs the vaporized fuel 300.

[A2. Operation of fluid storage device 12 when vehicle 10 rolls over]
FIG. 4 is a diagram showing an example of the state of the fluid storage device 512 according to the comparative example when the vehicle 10 rolls over. In the comparative example, as in the present embodiment, the valve mechanism 32 is provided in the filler pipe 30, but the breather valve 534 is not provided in the breather line 534. Therefore, at the time of rollover, the fuel 300 in the tank 20 flows into the fuel cap 36 through the breather pipe 50 and also flows into the filler pipe 30.

  Therefore, in the case of the comparative example, the pressure Pex (head pressure) applied to the fuel cap 36 at the time of rollover is the pressure applied from substantially all the fuel 300 in the fluid storage device 512 (see height H1 in FIG. 4). Therefore, in the comparative example, it is necessary to design the pressure resistance of the fuel cap 36 relatively large.

  FIG. 5 is a view showing an example of the state of the fluid storage device 12 according to the present embodiment when the vehicle 10 rolls over. In the present embodiment, the valve mechanism 32 is provided in the filler pipe 30 and the breather valve 52 is provided in the breather line 34. Therefore, at the time of rollover, it is possible to prevent the fuel 300 in the tank 20 from flowing into the fuel cap 36 side.

  Therefore, in the case of the present embodiment, the pressure Pex applied to the fuel cap 36 at the time of rollover is only the pressure from the fuel 300 originally present in the filler pipe 30 (see height H2 in FIG. 5). Therefore, in the present embodiment, the pressure resistance of the fuel cap 36 can be designed to be relatively small.

  FIG. 6 is a diagram comparing the pressure Pex around the filler 40, the required range of the sealability of the fuel cap 36, and the internal pressure Pt of the tank 20 between the comparative example and the present embodiment when the vehicle 10 rolls over. .

  As shown in FIG. 6, in the present embodiment, the pressure Pex around the filling port 40, the required range of sealability of the fuel cap 36 (cap sealability required range) and the internal pressure Pt of the tank 20 are both compared with the comparative example. Can be lowered.

[A3. Effect of this embodiment]
As described above, according to the present embodiment, when the vehicle 10 rolls over, the ball 74 (valve body) closes the upper opening 102 by the flow of the fuel 300 (the ball 74 of the two-dot chain line in FIG. Figure 5). Therefore, it is possible to prevent the fuel 300 in the fuel tank 20 from flowing to the side of the fuel supply port 40 via the breather valve 52 (first rollover valve) at the time of rollover. Therefore, if the valve mechanism 32 (fuel supply valve) is also closed or closed at the time of rollover, the pressure Pex from the fuel 300 is required for the member (for example, the fuel cap 36) on the fuel supply port 40 side. It is possible to reduce the pressure resistance. Therefore, the pressure resistance of the member on the side of the fuel supply port 40 with respect to the pressure Pex from the fuel 300 can be lowered to design, or the pressure resistance of the entire fluid storage device 12 can be improved.

  Further, by providing the breather valve 52 (the first rollover valve) in the breather line 34, when parts on the fuel supply port 40 side are partially omitted, the configuration on the fuel supply port 40 side can be simplified.

  In the present embodiment, the balls 74 (valves) have a density higher than that of the fuel 300. Further, the lower opening 100 is formed over a wider area than the area where the ball 74 can be closed (FIG. 3). Thereby, even if the internal pressure Pt of the fuel tank 20 acts on the ball 74 at the time of refueling, the ball 74 hardly moves at all. At this time, since the lower opening 100 is formed over a wider area than the area where the ball 74 can be closed, the air in the fuel tank 20 passes through the breather line 34 through the lower opening 100. Then, it is discharged to the filler port 40 side. Further, since the density of the balls 74 is larger than the density of the fuel 300, the balls 74 can stably close the upper opening 102 at the time of rollover.

  In the present embodiment, the valve mechanism 32 (fuel supply valve) is provided with a check valve (FIG. 2). As a result, when rolling over, it is easy to prevent the fuel 300 in the fuel tank 20 from applying pressure to a member (fuel cap 36 and the like) on the fuel supply port 40 side, even on the filler pipe 30 side.

  In the present embodiment, a ball 74 is used as a valve for closing the lower opening 100 and the upper opening 102 (FIG. 3). Also, the upper opening 102 is circular (FIG. 3). Thus, at the time of rollover, the ball 74 is pressed against the upper opening 102 under the pressure Pex from the fuel 300 to close the upper opening 102 (FIG. 5). Therefore, it is possible to prevent the pressure Pex from the fuel 300 from being applied to the member (fuel cap 36 etc.) on the fuel supply port 40 side with a simple configuration.

  In the present embodiment, one ball 74 and one upper opening 102 are provided as a valve body (FIG. 3). The cylindrical portion 70 has a smaller diameter at the small diameter portion 82 (position corresponding to the upper opening 102) than the large diameter portion 80 (position corresponding to the bottom member 92 (lower opening forming portion)) (see FIG. 3). Further, the cylindrical portion 70 is inclined from the large diameter portion 80 (a position corresponding to the bottom member 92) to the small diameter portion 82 (a position corresponding to the upper opening 102), and the ball 74 is upward at the time of rollover. A ramp 84 is formed which guides the opening 102. Thus, at the time of rollover, the ball 74 can be easily guided to the upper opening 102, whereby the upper opening 102 can be closed more reliably.

  In the present embodiment, a plurality of lower openings 100 are provided (FIG. 3). In the bottom member 92 (lower opening forming portion), an annular seating portion 94 (lower concave portion) into which the ball 74 (valve body) is inserted is formed around one of the lower opening 100 (FIG. 3) . As a result, at the time of refueling, air can easily pass through the breather line 34 via the lower opening 100 other than the lower opening 100 where the ball 74 is closed. In addition, when the ball 74 is displaced upward by the internal pressure Pt of the fuel tank 20, air can pass through the breather line 34 even through the lower opening 100 where the ball 74 is closed.

  In the present embodiment, the fluid storage device 12 includes a vent line 26 in which a canister 136 for adsorbing the fuel 300 vaporized in the fuel tank 20 is disposed, and a rollover valve 132 (second rollover provided in the vent line 26). And a valve) (FIG. 1). Thus, even if the vehicle 10 rolls over, the inside of the fuel tank 20 is maintained by the valve mechanism 32 (the fuel supply valve), the breather valve 52 (the first rollover valve) and the rollover valve 132 (the second rollover valve). It is possible to keep the fuel 300 in the fuel tank 20.

B. Modifications It is a matter of course that the present invention is not limited to the above embodiment, but can adopt various configurations based on the contents of the description of the present specification. For example, the following configuration can be adopted.

[B1. Applies to
In the above embodiment, the configuration in which the fluid storage device 12 is applied to the vehicle 10 has been described (FIG. 1). However, the application of the present invention is not limited to this, for example, from the viewpoint of a device for storing fluid (fluid storage device). For example, the present invention may be applied to moving objects such as ships and aircrafts. Or, it is also possible to apply the present invention to a manufacturing apparatus, a home appliance, and the like. In this case, the fluid stored in the fluid storage device 12 may be liquid (for example, water) or gas other than the fuel 300. In addition, depending on the application to which the present invention is applied, the breather line 34, the gas discharge mechanism 26, and the like may be omitted.

[B2. Fuel tank 20 (fluid container)]
In the above embodiment, it is assumed that the fuel tank 20 is in the shape of a rectangular parallelepiped (FIGS. 1 and 2). However, for example, from the viewpoint of a container for storing the fuel 300, the present invention is not limited thereto. For example, it is also possible to make the shape of the tank 20 cylindrical with a bottom.

[B3. Fuel filling mechanism 22]
(B3-1. Valve mechanism 32)
In the said embodiment, the valve mechanism 32 was provided with the non-return valve (FIG. 1, FIG. 2, FIG. 5). However, for example, from the viewpoint of enabling the supply of the fuel 300 at the normal time and the backflow prevention of the fuel 300 to the filler pipe 30 at the time of the rollover of the vehicle 10, it is not limited thereto. For example, the valve mechanism 32 may comprise a flap valve. However, from the viewpoint of making it easy to receive the pressure from the fuel 300, it is preferable that the flap valve is not inside the filler pipe 30, but outside (on the tank 20 side).

  In the above embodiment, the valve mechanism 32 is provided at the inner end 44 of the filler pipe 30 (FIG. 1, FIG. 2). However, for example, it is not limited to this from the viewpoint of preventing the fuel 300 in the tank 20 from flowing backward to the filler port 40 via the filler pipe 30 when the vehicle 10 rolls over. For example, the check valve constituting the valve mechanism 32 may be provided at a location other than the inner end 44 (for example, in the middle of the filler pipe 30).

(B3-2. Breather line 34)
In the above embodiment, the ball 74 is used as a valve for closing the upper opening 102 (FIG. 3). However, for example, it is not limited to this from the viewpoint of preventing the backflow of the fuel 300 to the filler pipe 30 by discharging the air in the tank 20 at the time of refueling and at the time of rollover.

  For example, instead of the ball 74, a member having a shape in which two cones or truncated cones are bonded at the bottom can be used. Alternatively, a member having a shape in which two quadrangular pyramids or quadrangular truncated pyramids are bonded at the bottom may be used. In addition, when the shape of a valve body is changed, it will be necessary to change the shape of the upper side opening part 102, the seating part 94, and the bottom member 92 (lower side opening formation part) as needed. Alternatively, it is possible to make the shape of the valve body on the seating portion 94 or the lower opening 100 side different from the shape of the valve body on the upper opening 102 side.

  In the above embodiment, the ball 74 is configured to be displaceable in the space surrounded by the cylindrical portion 70 and the bottom member 72 (FIG. 3). However, for example, it is not limited to this from the viewpoint of allowing the ball 74 (or the valve body) to pass the air in the tank 20 at the time of refueling and closing the upper opening 102 at the rollover of the vehicle 10.

  For example, it is possible to provide a slide mechanism which allows the valve body such as the ball 74 to be displaced only in the vertical direction at the normal time. Alternatively, a return spring may be provided to bias the valve body such as the ball 74 downward. However, if a return spring (for example, a coil spring) is simply provided in the configuration of FIG. 3, the ball 74 can not fully close the upper opening 102. Therefore, a groove for accommodating the return spring may be formed in the small diameter portion 82 of the cylindrical portion 70 so as not to disturb the full closing of the upper opening 102 by the ball 74.

  In the above embodiment, a single upper opening 102 is provided (FIG. 3). However, for example, from the viewpoint of realizing the air discharge at the time of refueling and the stopping of the fuel 300 at the time of rollover, a plurality of upper openings 102 may be provided. In this case, it is necessary to provide a sufficient number of valve bodies (such as balls 74) to close each upper opening 102.

  In the above embodiment, the structure of the breather valve 52 is as shown in FIG. However, for example, from the viewpoint of reducing the pressure Pex applied from the fuel 300 to the fuel cap 36 at the time of rollover of the vehicle 10 by combining the valve mechanism 32 on the filler pipe 30 side and the breather valve 52, it is not limited thereto. For example, the breather valve 52 may have other configurations.

[B4. Gas discharge mechanism 26]
In the above embodiment, the gas discharge mechanism 26 is provided to discharge the fuel 300 vaporized in the fuel tank 20 (FIG. 1, FIG. 2). However, for example, focusing on the function of the breather line 34, the gas discharge mechanism 26 can be omitted.

12: Fluid storage device 20: Fuel tank 26: Vent line 30: Filler pipe 32: Valve mechanism for fuel filling (valve for fuel supply) 34: Breather line
52 ... Breather valve (1st roll over valve)
70 ... cylindrical portion 74 ... ball (valve body)
82: Small diameter portion (upper opening formation portion) 84: Inclined portion 92: Bottom member (lower opening formation portion) 94: Seated portion (lower concave portion)
100 ... lower opening 102 ... upper opening 110 ... engine (target device) 122 ... piping (feed line)
132: second roll over valve 136: canister 300: fuel 302: liquid surface Ax: central axis (axial line) of the cylindrical portion

Claims (6)

With a fuel tank,
A filler pipe inserted into the fuel tank;
A breather line for discharging air in the fuel tank at the time of refueling;
A fluid storage device including: a feed line for delivering fuel from the fuel tank to a target device;
The fluid storage device is
A refueling valve for controlling the flow of the fuel from the filler pipe to the inside of the fuel tank;
And a first rollover valve provided in the breather line.
The first rollover valve is
A cylindrical portion whose axis is disposed along the vertical direction of the vehicle;
A lower opening forming portion formed with a plurality of lower openings through which air in the fuel tank passes under the cylindrical portion;
An upper opening forming portion formed with at least one upper opening through which air in the fuel tank passes above the cylindrical portion;
And a spherical valve body that closes the upper opening due to the flow of the fuel when the vehicle rolls over .
The said lower opening forming portion, a fluid reservoir and wherein the the lower recess of the annular said valve body enters the Ru is formed in one circumference of said lower opening. In the fluid storage device according to claim 1,
The valve body has a higher density than the fuel,
A fluid storage device characterized in that the at least one lower opening is formed over an area wider than an area where the valve body can be closed. In the fluid storage device according to claim 1 or 2,
The fluid storage device, wherein the fuel supply valve is a check valve or a flap valve. The fluid storage device according to any one of claims 1 to 3 .
Fluid storage device prior SL upper opening characterized in that it is a circular shape. In the fluid storage device according to claim 4,
One each of the valve body as a sphere and the upper opening as a circular shape are provided;
The cylindrical portion has a smaller cross-sectional area at a position corresponding to the upper opening forming portion than a cross-sectional area at a position corresponding to the lower opening forming portion,
The cylindrical portion is inclined from the position corresponding to the lower opening forming portion toward the position corresponding to the upper opening, and is an inclined portion for guiding the valve body to the upper opening at the time of rollover. A fluid storage device characterized in that The fluid storage device according to any one of claims 1 to 5 .
The fluid storage device is
A vent line provided with a canister for adsorbing the fuel vaporized in the fuel tank;
And a second rollover valve provided in the vent line.

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