JP4924366B2 - Fuel supply system - Google Patents

Description

  The present invention relates to a fuel refueling device, and more particularly to a fuel refueling device that performs refueling from an inserted refueling gun and discharge of fuel vapor from a fuel tank.

  In such a fuel refueling device, a refueling gun is inserted when refueling a fuel tank of a vehicle or the like, and fuel from the gun is refueled to the fuel tank. In such refueling, the fuel vapor in the tank needs to be discharged outside the tank by the amount of fuel supplied to the tank. Therefore, the fuel refueling device is provided in the tank separately from the flow path for refueling. A flow path for discharging fuel vapor is provided. In providing such a fuel vapor discharge channel, the member into which the fuel gun is inserted (gun insertion member) is expanded, and then a fuel supply channel and a fuel vapor channel are formed in the gun insertion member. (For example, Patent Document 1), it is proposed to provide a fuel vapor discharge path from the fuel tank, that is, a so-called breather line, separately from the fuel supply path of the fuel supply device, and to form the breather line up to the filler neck. (For example, Patent Document 2). In these patent documents, various techniques for suppressing the scattering of fuel droplets contained in the fuel vapor are proposed in releasing the fuel vapor after taking the above-described flow path configuration.

Japanese Patent No. 3821732 Japanese Patent Laid-Open No. 2003-80959

  The fuel refueling device proposed in Patent Document 1 is provided with an air vent hole in a guide member of a fuel gun, and by covering the air vent hole with a baffle plate, fuel vapor does not directly enter the air vent hole, Suppression of fuel splashes is suppressed. By the way, in recent years, there is a demand for space saving when a fuel refueling device is mounted on a vehicle. However, in the fuel refueling device proposed in Patent Document 1, a guide member with a baffle plate is attached to a fuel gun insertion portion. The space for mounting the fuel refueling device to the vehicle is widened because the insertion portion itself is used as a fuel vapor flow path by being disposed at the extended portion. On the other hand, if the breather line is provided separately from the fuel refueling device, it is not necessary to expand the fuel gun insertion portion, and this meets the demand for space saving of the fuel refueling device mounting space. A fuel refueling device in which a breather line as proposed in (1) is provided separately from the fuel refueling device is being used frequently.

  And in patent document 2, scattering of a fuel splash is suppressed by carrying out offset arrangement | positioning of the breather tube connection cylinder part provided in the filler neck, and the steam discharge port provided in the retainer. However, if fuel vapor is ejected obliquely from the breather tube connecting tube portion toward the vapor discharge port, fuel droplets may be discharged from the vapor discharge port. Therefore, further prevention of fuel droplet scattering is desired. It came to be.

  In view of the above-described problems, the present invention is provided with a fuel vapor discharge path from the fuel tank separately from the fuel supply path, and enhances the effect of preventing scattering of fuel droplets contained in the fuel vapor from the fuel vapor discharge path. Is the purpose.

  In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[Applicable fuel refueling device]
A fuel refueling device that performs refueling from a refueling gun inserted into a refueling port and discharge of fuel vapor from a fuel tank,
A gun insertion hole into which the refueling gun enters; a gun guide surface portion that surrounds the gun insertion hole and provides a refueling gun guide to the gun insertion hole; and a rib that protrudes from a lower surface of the gun guide surface portion so as to reinforce the gun guide surface portion A gun guide member having
While positioning and surrounding the gun guide member, a fuel flow path downstream from the gun insertion hole is formed, and a vapor discharge opening connected to a fuel vapor discharge path from the fuel tank is formed on a side surface of the fuel flow path. A filler neck having
The gun guide member is
The gun guide surface portion is provided with a vent opening that communicates the fuel flow path of the filler neck with the fuel filler opening, and the vent opening is offset from an axial extension line of the fuel vapor discharge path that passes through the vapor discharge opening. The gist of the present invention is to position the filler neck so as to block the fuel vapor from flowing from the vapor discharge opening to the ventilation opening by the rib.

  In the fuel supply apparatus having the above configuration, when a fuel gun is inserted into the fuel filler port, the fuel gun is guided by the gun guide surface portion of the gun guide member and enters the gun insertion hole, and the filler neck gun is inserted into the insertion hole of the gun tip. It is located in the fuel flow path formed on the further downstream side. Then, through the operation of the fueling gun, fueling from the fueling gun is performed. With such refueling, the fuel vapor in the fuel tank passes through the fuel vapor discharge path and flows out from the vapor discharge opening on the side surface of the fuel flow path in the filler neck to the fuel flow path at the location where the opening is formed. The fuel vapor that has flowed out of the vapor discharge opening is directed to the ventilation opening of the gun guide surface portion that communicates the fuel flow path with the fuel supply port. In the above-described fuel supply device, the following behavior occurs.

  In the fuel refueling device described above, since the vent opening is offset from the axial extension line of the fuel vapor discharge path passing through the vapor discharge opening, the fuel vapor flowing out from the vapor discharge opening is slanted from the vapor discharge opening toward the vent opening. Only the fuel vapor proceeding to (5) goes from the vapor discharge opening to the ventilation opening, and the other fuel vapors wrap around the gun and hit the ventilation opening while colliding with the fuel gun that has entered the gun insertion hole. Therefore, the fuel droplets contained in the other fuel vapors described above are repelled by the fuel gun when the fuel vapor collides with the fuel gun, and do not easily reach the vent opening.

  On the other hand, the fuel vapor traveling obliquely from the vapor discharge opening toward the ventilation opening is blocked by the reinforcing rib on the lower surface of the gun guide surface before reaching the ventilation opening, collides with the rib, and then wraps around the rib. Reach the vent opening. However, since the fuel splash contained in the fuel vapor traveling obliquely from the vapor discharge opening toward the ventilation opening is rebounded to the rib when the fuel vapor rib collides with the fuel vapor, the fuel splash is contained in the fuel vapor. It becomes difficult to reach the ventilation opening. As a result, according to the fuel refueling apparatus having the above-described configuration, the fuel splash contained in the fuel vapor from the fuel vapor discharge path provided separately from the fuel flow path serving as the fuel supply path is rebounded, thereby preventing the fuel splash from being scattered. Can be increased. As described above, the fuel vapor in the state where the fuel splashes are bounced back is released to the atmosphere from the fuel filler opening after reaching the ventilation opening.

  The fuel refueling device described above can be configured as follows. For example, the filler neck is provided with a recess at the end on the side surrounding the gun guide member, and the gun guide member is provided with a protrusion that enters the recess. If it carries out like this, positioning of a gun guide member can be performed simply via the protrusion part of a gun guide member.

  Further, the gun guide member is provided with an insertion hole lower end edge extending from the periphery of the gun insertion hole to the inner peripheral wall side of the filler neck on the lower end side of the gun insertion hole, and the rib is formed from the lower surface of the gun guide surface part. It can also be made to protrude over the lower edge of the insertion hole. If it carries out like this, the reinforcement effect of the gun guide surface part by a rib can be heightened. Moreover, since the lower end edge of the insertion hole extending from the periphery of the gun insertion hole approaches the inner peripheral wall side of the filler neck, the lower end edge of the insertion hole supports the lower end side of the gun insertion hole of the gun guide member with respect to the inner peripheral wall side of the filler neck. Can be. For this reason, careless rattling of the gun guide member can be suppressed.

  In addition, the filler neck is provided with a plate-like flow path protruding piece protruding toward the fuel flow path so as to support the gun guide member, and the flow path protruding piece is provided at the lower end side of the gun guide member with the vapor discharge opening. It can be made to face. In this way, even in the fuel vapor other than the fuel vapor flowing obliquely from the vapor discharge opening toward the vent opening, out of the fuel vapor flowing out from the vapor discharge opening, a collision with this channel protruding piece occurs. The fuel splash contained in the fuel vapor can be rebounded more reliably. Therefore, the effect of preventing the splashing of fuel is further increased.

  Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is an explanatory view schematically showing an entire structure of a fuel refueling apparatus 10 as an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the fuel refueling apparatus 10 taken along line 2-2 in FIG. 3 is a cross-sectional view of the fuel supply device 10 taken along line 3-3 in FIG. 1, and FIG. 4 is a top view, a side view, and a rear view of the gun guide member 130 that forms the main part of the fuel supply device 10. It is explanatory drawing shown visually.

  As shown in the figure, the fuel refueling device 10 includes a retainer 100 to which a fuel cap FC is to be attached, and a downstream side of which includes a filler neck 150 with a gun guide member 130 interposed therebetween, which are covered with a cover described later. . The metal retainer 100 includes a tapered sealing surface 102 on the opening end side thereof, and a lower side thereof is a cap mounting portion 106 and a cylindrical body portion 108. The cap mounting portion 106 is a screwed portion of the fuel cap FC, and has a male screw 104 that is screwed with a female screw of the cap. The body portion 108 is formed with a diameter larger than that of the cap mounting portion 106, and is connected to the cap mounting portion 106 via a connection step portion 110. In addition, the retainer 100 includes three crimping portions 112 at equal circumferential intervals on the lower end side of the body portion 108, and the caulking portion holds the filler neck 150 attached to the body portion 108 as described later. To do. In addition, the retainer 100 includes a notch 114 for positioning the filler neck 150 at the lower end of the body portion 108.

  The gun guide member 130 is a resin molded product, and is attached to the opening end of the filler neck 150 to guide a fuel gun (not shown) inserted into the opening of the retainer 100. The gun guide member 130 holds the cylindrical portion 132 on the upper end side on the bottom portion 134 by the gun guide surface portion 136 and, as shown in FIGS. 2 to 4, the inner wall of the gun guide surface portion 136 is recessed inward. A gun insertion hole 137 is formed by the recessed gun guide surface portion 136 while performing a guide function of a fuel gun (not shown) by the guide surface portion 136. The bottom portion 134 is formed so as to expand from the periphery of the lower end of the gun insertion hole 137, and by approaching the inner peripheral wall of the filler neck 150 in almost the entire outer peripheral edge thereof, the posture of the gun guide member 130 in the filler neck 150 is maintained and extended. Aims to maintain the posture of the gun guide surface portion 136 that performs the guide function. That is, this bottom part 134 is corresponded to the insertion hole lower end edge part of this application. Since the gun guide member 130 includes ribs 138 protruding from the lower surface of the gun guide surface portion 136 between the bottom portion 134 and the gun guide surface portion 136 at an appropriate interval, the gun guide surface portion 136 is reinforced by the ribs 138. In addition, the reliability of the posture maintenance by the rib 138 is enhanced. The position of the rib 138 in a state where the gun guide member 130 is positioned and mounted on the filler neck 150 will be described later.

  The gun guide member 130 is provided with a vent opening 139 in the gun guide surface portion 136 for releasing air during refueling, and discharging fuel vapor in a fuel tank (not shown in detail). A protruding piece 140 protruding from the outer periphery is provided, and a bullet hook 142 is provided on the side wall of the cylindrical portion 132. As shown in the plan view of FIG. 4, the ventilation openings 139 are formed at two locations and are formed so as to penetrate the gun guide surface portion 136 and the bottom portion 134. In this embodiment, the projecting pieces 140 are formed at two locations on the upper end of the cylindrical portion, and the elastic hooks 142 are formed at two locations on the peripheral wall of the cylindrical portion. The protruding pieces 140 and the elastic hooks 142 are recessed in a filler neck 150 described later. In combination with the location, etc., the later-described rotation stop / prevention and circumferential mounting position of the gun guide member 130 are defined. This circumferential mounting position regulation is to prevent so-called reverse attachment, and in the circumferential direction of the cylindrical portion 132 in the gun guide member 130, the formation pitch of the bullet hooks 142 and the bullet hooks 142 has a predetermined relationship. To be achieved.

  The filler neck 150 is a resin molded product, and is inserted into the body portion 108 of the retainer 100 and attached, and a cylindrical body is formed so as to form a fuel flow path NR following the retainer 100 and the gun insertion hole 137 of the gun guide member 130. The neck main body 152, the inlet pipe connection cylinder part 154, and the breather pipe connection cylinder part 156 are provided. The inlet pipe connecting cylinder portion 154 is connected to the inlet pipe IP and is connected to the lower end of the neck body 152, and guides fuel from the fuel gun to the inlet pipe IP through the fuel flow path NR. The breather pipe connecting cylindrical portion 156 obliquely protrudes from the periphery of the steam discharge opening 158 formed on the lower end side of the side wall of the neck body 152 and is connected to a breather pipe (not shown). Through the discharge opening 158, the filler neck 150, specifically, the fuel passage NR on the lower end side of the neck body 152 is led. The fuel vapor that flows out from the vapor discharge opening 158 to the fuel flow path NR due to fuel supply passes through the ventilation opening 139 of the gun guide member 130 and is released to the atmosphere from the upper end opening (fuel supply port) of the retainer 100. The behavior of the fuel vapor will be described later together with the positional relationship between the opening position of the vapor discharge opening 158 and the vent opening 139 in the gun guide member 130 to which the filler neck 150 has been attached.

  The neck main body 152 has an upper end side of the main body as an outer diameter thick portion 153 that is inserted into the body portion 108 of the retainer 100 without a gap, and a protruding piece 140 of the gun guide member 130 is provided at the opening periphery of the upper end of the thick portion. Is provided with a through hole 162 into which the bullet hook 142 of the gun guide member 130 is inserted. The neck body 152 includes a ring-shaped recess 164 formed on the side wall surface of the thick portion 153 and a sealing O-ring 166, and has a protrusion 168 provided continuously with the thick portion 153. The protrusions 168 enter a notch 114 provided at the lower end of the retainer 100, thereby fulfilling a positioning function between the retainer 100 and the filler neck 150.

  Here, prior to the description of the cover, the manner in which the retainer 100, the gun guide member 130, and the filler neck 150 are assembled will be described.

  Before attaching the filler neck 150 to the retainer 100, first, the gun guide member 130 is attached to the filler neck 150. That is, the gun guide member 130 is inserted into the neck body 152 of the filler neck 150 from the bottom 134 side. In this case, the outer diameters of the cylindrical portion 132 and the bottom portion 134 of the gun guide member 130 are regulated so that they can be inserted into the neck body 152 and no unintentional rattling occurs inside the neck body 152. In the process of inserting the gun guide member 130, the bullet hook 142 is retracted in contact with the inner wall of the neck body 152, but when the bullet hook 142 reaches the through hole 162 of the filler neck 150, the bullet hook 142 is bulleted. It enters the through hole 162. In this state, even in the protruding piece 140 of the gun guide member 130, it enters the recess 160 of the filler neck 150. Accordingly, as shown in FIGS. 2 and 3, the gun guide member 130 is surrounded by the filler neck 150 in a state where the upper end thereof is substantially flush with the upper end of the filler neck 150, and is connected to the recess 160. By the insertion of the protruding piece 140 and the insertion of the elastic hook 142 into the through-hole 162, the gun guide member 130 is prevented from rotating and withdrawn from the filler neck 150 and positioned.

  When the gun guide member 130 is thus positioned with respect to the filler neck 150, the gun guide member 130 is positioned so that the ventilation opening 139 is positioned with respect to the vapor discharge opening 158, that is, passes through the vapor discharge opening 158. The ventilation opening 139 is placed at a position offset from the axial extension line of the breather pipe connecting tube portion 156. As shown in FIG. 4, since the gun guide member 130 positions the ventilation opening 139 between the vapor discharge openings 158, as shown in FIG. 3, the gun guide member 130 causes its gun guide surface portion 136 to breather. While making it oppose with respect to the vapor | steam discharge opening 158 of the pipe connection cylinder part 156, the rib 138 is also made to oppose the vapor | steam discharge opening 158. FIG.

  As described above, the filler neck 150 that surrounds and is attached to the gun guide member 130 is inserted into the body portion 108 of the retainer 100. The filler neck is inserted such that the protrusion 168 of the filler neck 150 enters the notch 114 of the retainer 100, and the upper end of the thick portion 153 of the filler neck 150 is close to the connecting step 110 of the retainer 100. Alternatively, it comes into contact. Thereafter, when the caulking portion 112 of the retainer 100 is pressed inward, as shown in FIGS. 2 and 3, the caulking portion 112 engages with the lower end portion of the thick portion 153 to prevent the filler neck 150 from being pulled out. As a result, the gun guide member 130 is clamped between the connection step portion 110 of the retainer 100 and the upper end portion of the filler neck 150 (specifically, the thick portion 153) after the filler neck 150 is prevented from rotating and withdrawn. Then, the retainer 100, the gun guide member 130, and the filler neck 150 become an integrated sub-assembly product.

  Next, the cover that covers the above-described sub-assembly product will be described. The fuel supply apparatus 10 of the present embodiment has resin covers 170R and 170L formed in a divided manner. The cover 170R and the cover 170L are joined from the left and right directions of the retainer 100 in the sub-assembly product and surround the retainer 100. The two covers include upstream cover portions 172R and 172L that surround the retainer 100 including the cap mounting portion 106, and downstream cover portions 174R that are formed subsequent to the cover portion and surround the lower end region of the retainer 100. It is divided into 174L. In this case, the cover 170R and the cover 170L are joined and integrated by inserting engaging claws 175 provided at the upper and lower ends of the respective joining surfaces into the engaging recesses 176.

  The fuel refueling device 10 covered with the cover as described above has the upstream cover portions 172R and 172L mounted in the body mounting holes BH in a state after being assembled to the fuel filler of the vehicle body. In this case, the fuel supply device 10 is fixed to the vehicle body by an engagement tool (not shown). On the other hand, the downstream cover portions 174R and 174L are positioned below the body mounting hole BH, and the downstream cover portion 174R includes the filter storage container 200 mounted on the lower end side thereof. The container is mounted by inserting the engagement hook 202 of the filter storage container 200 into the through hole 180 provided in the container cover part 179 at the lower end of the downstream cover part 174R. An air filter (not shown) is mounted in the filter storage area 210 of the filter storage container 200, and a purge pipe (not shown) is arranged from the filter storage container 200 to a canister (not shown) already attached to a fuel tank (not shown). It is installed.

  Next, the air flow path formed by the covers 170R and 170L described above will be described. The covers 170R and 170L separate the upper end edges of the respective upstream cover portions 172R and 172L from the back surface of the seal surface 102 of the retainer 100, so that an air introduction portion 178 is formed at the upper end of the cover. The air flow path from the air introduction part 178 to the filter storage area 210 of the filter storage container 200 of the downstream cover part 174R is connected to the upstream air flow path 190 on the upper end side of the upstream cover part connected to the air introduction part 178 and the upstream side. And a downstream air passage 192 extending from the lower end side of the side cover portion to the downstream cover portion, and these passages are formed on the outer periphery of the cap mounting portion 106 and the connecting step portion 110 in the retainer 100 so that air can be vented. . The downstream air flow path 192 communicates with the filter storage region 210 of the filter storage container 200 through the vent hole 184 inside the ventilation convex portion 182 provided on the outer periphery of the downstream cover portion 174R. Thus, when a canister (not shown) is purged, the air enters the upstream air flow path 190 from the air introduction portion 178, passes through the flow path, and then reaches the downstream air flow path 192, and the vent 184 is Then, after passing through a filter (not shown) in the filter storage area 210, it is introduced into the canister.

  As described above, in the fuel supply apparatus 10 of the present embodiment, when a fuel gun (not shown) is inserted into the fuel supply port that is the upper end opening of the retainer 100, the fuel supply gun is used as the gun guide surface portion 136 of the gun guide member 130. Is guided into the gun insertion hole 137 and the tip of the gun is positioned in the fuel flow path NR downstream of the gun insertion hole 137. Then, through the operation of the fueling gun, fueling from the fueling gun is performed. With such refueling, the fuel vapor in the fuel tank passes through a breather pipe connecting cylinder portion 156 connected to a breather pipe (not shown), and the opening forming portion from the vapor discharge opening 158 on the side surface of the fuel flow path NR in the neck body 152. To the fuel flow path NR. The fuel vapor that has flowed out of the vapor discharge opening 158 is directed to the ventilation opening 139 of the gun guide member 130. However, since the fuel supply device 10 has the above-described positional relationship of the ventilation opening 139 and the rib 138, the fuel supply of this embodiment is performed. The behavior of the fuel vapor in the apparatus 10 is as follows. FIG. 5 is an explanatory diagram for explaining the behavior of the fuel vapor flowing out from the vapor discharge opening 158, with a schematic configuration around the vapor discharge opening 158. FIG.

  As described above, in the fuel supply device 10 of this embodiment, the breather opening 139 of the gun guide member 130 positioned and mounted on the filler neck 150 is connected to the breather pipe connecting cylinder portion passing through the vapor discharge opening 158 as shown in FIG. The gun guide surface portion 136 and the rib 138 are opposed to the vapor discharge opening 158, and the rib is positioned between the vapor discharge opening 158 and the vent opening 139. For this reason, after the fuel vapor NJ indicated by the white arrow in FIG. 5 flows out from the vapor discharge opening 158 including the fuel vapor NJ which is going to move obliquely from the vapor discharge opening 158 toward the ventilation opening 139, the gun It collides with the lower surface of the guide surface portion 136 and the rib 138 to change the direction of flow, and wraps around the rib 138 and the bottom portion 134 to reach the ventilation opening 139. Although the fuel gun is not shown in FIG. 5, since the fuel gun is inserted into the gun insertion hole 137 at the time of fueling, the fuel vapor NJ flowing out from the steam discharge opening 158 has circulated around the bottom portion 134. Also, while colliding with the refueling gun, the gun wraps around and reaches the ventilation opening 139. Therefore, the fuel splash contained in the fuel vapor NJ is rebounded by the rib 138, the gun guide surface portion 136, or the fuel gun when the fuel vapor NJ collides with the rib 138, the gun guide surface portion 136, or the fuel gun. Since it adheres to the surface, it does not reach the ventilation opening 139. Therefore, the fuel droplets contained in the fuel vapor NJ are separated from the vapor component, and a situation in which the fuel droplets are inadvertently released to the atmosphere when the fuel cap FC is detached can be suppressed. In other words, the fuel refueling device 10 of the present embodiment is configured so that even if the fuel vapor NJ flows from the breather pipe connecting cylinder 156 via the breather pipe provided separately from the fuel flow path NR that is the fuel supply path, the fuel vapor NJ flows into the fuel vapor NJ. By splashing the contained fuel splashes as described above by the ribs 138 and the like, it is possible to achieve an effect of preventing high fuel splashes.

  Further, in the fuel supply apparatus 10 of the present embodiment, the rotation stop (positioning) between the gun guide member 130 and the filler neck 150 is performed, and the protruding piece 140 at the upper end of the gun guide member 130 is provided in the recess 160 provided in the filler neck 150. Achieved by getting in. Therefore, rotation prevention of the gun guide member 130 with respect to the filler neck 150 can be simply performed with a simple configuration of entering the protruding piece into the recess. In addition, since the upper end of the gun guide member 130 is substantially flush with the filler neck 150 and is sandwiched between the connecting step 110 and the filler neck 150, the gun guide member 130 will not be inadvertently loosened. Can be.

  In addition, removal of the gun guide member 130 from the filler neck 150 can be easily achieved by engaging the elastic hook 142 of the gun guide member 130 with the through hole 162 of the filler neck 150.

  Further, in the fuel refueling device 10 of the present embodiment, when the gun guide member 130 for guiding the fuel gun is mounted on the filler neck 150, the gun guide surface portion 136 that performs gun guidance is connected to the bottom portion 134, and the filler neck 150 is provided. The inner wall of the neck body 152 (specifically, the neck main body 152) is arranged so that the substantially entire outer periphery of the bottom portion 134 is close to or in contact with the inner wall. For this reason, since the attitude of the gun guide member 130 in the filler neck 150 and, in turn, the attitude of the gun guide surface portion 136 that performs the guide function can be maintained with high reliability, the guide function of the fuel gun is not impaired. Moreover, the rib 138 provided between the bottom portion 134 and the gun guide surface portion 136 is preferable because the reliability of such posture maintenance is further increased. In addition, since the bottom portion 134 also serves as a support for the lower end side of the gun guide member 130 with respect to the inner peripheral wall side of the filler neck 150, inadvertent rattling of the gun guide member 130 can be suppressed. Therefore, it is possible to suppress or avoid the hitting sound generated due to rattling when the fuel vapor NJ collides with the rib 138 and the gun guide surface portion 136.

  Next, another embodiment will be described. FIG. 6 is a cross-sectional view corresponding to FIG. 2 of the fuel refueling apparatus 10A of another embodiment, and FIG. 7 shows the behavior of the fuel vapor flowing out from the vapor discharge opening 158 of this fuel refueling apparatus 10A and the peripheral configuration of the vapor discharge opening 158 It is explanatory drawing demonstrated in schematic view. This embodiment is characterized in that the collision of the fuel vapor NJ flowing out from the vapor discharge opening 158 is caused also by the flow path protruding piece 159 formed to protrude from the fuel flow path NR of the neck body 152.

  As shown in these drawings, the fuel refueling device 10A has a gun guide member 130A having a cylindrical portion 132 having a short size, and the filler neck 150 is located on the lower end side of the fuel flow path NR in the neck body 152. It has a flow path protruding piece 159 that supports the guide member 130A in contact with the bottom portion 134 thereof. This flow path protruding piece 159 is formed on the peripheral wall of the neck body 152 so as to protrude inward from the peripheral wall of the fuel flow path NR, and to the vapor discharge opening 158 on the lower end side (bottom 134 side) of the gun guide member 130A. Opposite.

  Even in the fuel supply apparatus 10A, the gun guide member 130 positioned and mounted on the filler neck 150 places the ventilation opening 139 at a position offset from the axial extension line J of the breather pipe connecting cylinder portion 156 that passes through the vapor discharge opening 158. At the same time, the gun guide surface portion 136 and the rib 138 are opposed to the vapor discharge opening 158, and the rib is positioned between the vapor discharge opening 158 and the ventilation opening 139. Moreover, on the lower end side of the gun guide member 130, the filler neck 150 makes the flow path protruding piece 159 face the vapor discharge opening 158. For this reason, after the fuel vapor NJ indicated by the white arrow in FIG. 7 flows out from the vapor discharge opening 158 including the fuel vapor NJ which is going to move obliquely from the vapor discharge opening 158 toward the ventilation opening 139, the gun It collides with the lower surface of the guide surface part 136, the rib 138 and the flow path projecting piece 159 to change the direction of the flow, and wraps around the rib 138, the bottom section 134 and the flow path projecting piece 159 to reach the ventilation opening 139. As a result, even with the fuel supply device 10A, the fuel splash contained in the fuel vapor NJ is rebounded by the rib 138 or the like as described above, thereby achieving an effect of preventing high fuel splash.

  As mentioned above, although the embodiment of the present invention has been described in the embodiments, the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the gist thereof. Is possible. For example, if the protruding piece 140 of the gun guide member 130 is fitted into the recess 160 of the filler neck 150, the gun guide member 130 is moved relative to the filler neck 150 by fitting the protruding portion into the recess. In addition to being able to stop rotation, it can also be prevented from being removed.

It is explanatory drawing which decomposes | disassembles and shows roughly the whole structure of the fuel supply apparatus 10 as an Example of this invention. It is sectional drawing which fractures | ruptures and shows the fuel supply apparatus 10 by the 2-2 line in FIG. It is sectional drawing which fractures | ruptures and shows the fuel supply apparatus 10 by the 3-3 line in FIG. 3 is an explanatory view showing a gun guide member 130 forming a main part of the fuel supply apparatus 10 in a top view, a side view, and a back view. FIG. It is explanatory drawing which illustrates the behavior of the fuel vapor | steam which flowed out out of the vapor | steam discharge opening 158, looking at the structure around the vapor | steam discharge opening 158 roughly. It is sectional drawing equivalent to FIG. 2 about 10 A of fuel supply apparatuses of another Example. It is explanatory drawing which illustrates the behavior of the fuel vapor | steam which flowed out out of the vapor | steam discharge opening 158 of 10 A of fuel supply apparatuses, looking at the periphery structure of the vapor | steam discharge opening 158 roughly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10A ... Fuel supply apparatus 100 ... Retainer 102 ... Sealing surface 104 ... Male screw 106 ... Cap mounting part 108 ... Body part 110 ... Connection step part 112 ... Caulking part 114 ... Notch 130, 130A ... Gun guide member 132 ... Cylindrical part 134 ... Bottom 136 ... Gun guide surface 137 ... Gun insertion hole 137 Downstream ... Gun insertion hole 138 ... Rib 139 ... Ventilation opening 140 ... Projection piece 142 ... Rebound hook 150 ... Filler neck 152 ... Neck body 153 ... Thick part 154 ... Inlet pipe connecting cylinder 156 ... Breather pipe connecting cylinder 158 ... Vapor discharge opening 159 ... Flow path protruding piece 160 ... Recess 162 ... Through hole 164 ... Annular recess 166 ... O-ring 168 ... Protrusion 170L ... Cover 170R ... Cover 172R ... Upstream side cover part 174R ... Downstream side cover part 175 ... Claw 176 ... Engaging recess 178 ... Air introduction part 179 ... Container cover part 180 ... Through hole 182 ... Venting convex part 184 ... Ventilation hole 190 ... Upstream air flow path 192 ... Downstream air flow path 200 ... Filter storage container 202 ... engaging hook 210 ... filter storage area FC ... fuel cap BH ... body mounting hole IP ... inlet pipe NR ... fuel flow path NJ ... fuel vapor J ... shaft extension line

Claims (3)

A fuel refueling device that performs refueling from a refueling gun inserted into a refueling port and discharge of fuel vapor from a fuel tank,
A gun insertion hole into which the refueling gun enters; a gun guide surface portion that surrounds the gun insertion hole and provides a refueling gun guide to the gun insertion hole; and a rib that protrudes from a lower surface of the gun guide surface portion so as to reinforce the gun guide surface portion A gun guide member having
While positioning and surrounding the gun guide member, a fuel flow path downstream from the gun insertion hole is formed, and a vapor discharge opening connected to a fuel vapor discharge path from the fuel tank is formed on a side surface of the fuel flow path. A filler neck having
The gun guide member is
Includes a vent opening port communicating with said fuel flow passage of the filler neck to the gun guide surface to the filler opening, said vent opening is offset from the axis extension line of the fuel vapor emission paths through the pre-Symbol vapor discharge opening is positioned in the filler neck so that the position, shielding the venting of fuel vapor from the vapor discharge opening by said ribs to said vent opening Rutotomoni,
The lower end of the gun insertion hole has an insertion hole lower end edge extending from the periphery of the gun insertion hole to the inner peripheral wall side of the filler neck, and the rib extends from the lower surface of the gun guide surface part to the lower end edge of the insertion hole. A fuel refueling device that is hung and protruded . The fuel refueling device according to claim 1,
The filler neck includes a recess at an end on the side surrounding the gun guide member,
The gun guide member includes a protrusion that enters the recess. A refueling apparatus of placing serial to claim 1 or claim 2,
The filler neck includes a plate-like flow path protruding piece protruding toward the fuel flow path so as to support the gun guide member, and the flow path protruding piece is formed on the vapor discharge opening at the lower end side of the gun guide member. The fuel refueling device that is facing.

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