JP3377018B2 - Fuel storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel storage device mounted on an automobile or the like, and to a technique for improving fuel refuelability.

[0002]

2. Related Background Art Various devices for treating harmful emission components are attached to an engine and a vehicle body of an automobile in order to prevent air pollution. For example, blow-by gas mainly composed of unburned fuel component (HC) leaks from the combustion chamber into the crankcase, and this is introduced into the intake pipe by the blow-by gas recirculation device and burned together with fresh air. Further, the gasoline vapor generated in the fuel tank, that is, the fuel evaporative gas containing HC as a main component is introduced into the intake pipe through the fuel evaporative emission control device and burned together with fresh air in the same manner as the blow-by gas. . Further, in order to prevent the fuel evaporative gas accumulated in the fuel tank at the time of refueling from being discharged into the atmosphere from the refueling port, the OR
A VR (Onboard Refueling Vapor Recovery) system has been developed.

In the ORVR system, the aspiration at the time of refueling sucks the atmosphere around the gun nozzle of the refueling gun together with the fuel into the refueling pipe to prevent the evaporative emission of the fuel during refueling. The fuel evaporative gas accumulated in the tank is introduced into a canister, which is a fuel evaporative gas emission suppression device, via a vapor hose and supplied to the intake system of the engine for combustion.

However, when the air is sucked into the fuel supply pipe together with the fuel during refueling, the air absorbs the fuel and the amount of fuel evaporative emission in the fuel tank increases. When the fuel evaporative emission increases in this way, the amount of the fuel evaporative emission introduced into the canister via the vapor hose also increases. As a result, the burden on the canister increases and the canister must be upsized.

Therefore, in order to reduce the amount of atmospheric suction during refueling, it is considered to make the inner diameter of the refueling pipe as close as possible to the outer diameter of the gun nozzle of the refueling gun. It is disclosed in Japanese Patent Publication No.

[0006]

By the way, in recent years,
In order to prevent accidental refueling of unleaded gasoline cars with unleaded gasoline, the outer diameter of the gun nozzle of the refueling gun is different. An insertion prevention guide member, that is, a gun nozzle diameter identification guide member is provided. In a vehicle equipped with such a guide member, when the inner diameter of the oil supply pipe is brought close to the outer diameter of the gun nozzle as disclosed in the above publication, the presence of this guide member causes the tip of the gun nozzle of the oil supply gun to move. It is surely held in a state where it is not inserted into the oil supply pipe or guided to a predetermined position. Therefore,
This is not preferable because there is a possibility that the refueling property may be deteriorated or the guide member or the refueling pipe may be damaged by forcibly inserting the tip of the gun nozzle into the refueling pipe.

Further, the refueling gun is provided with a refueling stop sensor for detecting fuel flowing back through the refueling pipe and automatically stopping refueling of the fuel when the fuel tank is filled with fuel. This refueling stop sensor is, for example,
The fuel is sucked from a detection hole provided at the tip of the gun nozzle of the fuel supply gun, and the fuel supply is stopped when the pressure in the detection hole rises.

However, as described above, when the inner diameter of the oil supply pipe is brought close to the outer diameter of the gun nozzle, the detection hole and the inner wall surface of the oil supply pipe are likely to come into contact with each other, and the detection hole is clogged and the inside of the detection hole is closed. There is a possibility that the refueling stop sensor may malfunction due to an increase in the pressure of the fuel refueling stop sensor, or the fuel may not be properly sucked from the detection hole, and the refueling stop sensor may not function properly. Referring to the technique disclosed in the above publication, a communication hole or the like is provided so as to face the detection hole so as to pass the fuel therethrough. However, the position of the communication hole and the detection hole should always be aligned when refueling. It is difficult to say that this technology does not always make the refueling stop sensor function well.

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to mainly use a gun nozzle diameter identification guide member in a fuel storage device in which an inner diameter dimension of a fuel supply pipe is close to an outer diameter dimension of a gun nozzle. Fuel that can reliably hold the refueling gun at a predetermined position without damaging the gun nozzle or refueling pipe even if it has one, and as a secondary measure can reliably prevent oversupply of fuel It is to provide a storage device.

[0010]

In order to achieve the above object, the first aspect of the present invention provides a fuel tank mounted on a vehicle for storing fuel supplied to an internal combustion engine of the vehicle.
One end is connected to the fuel tank, while the other end is provided with a gun nozzle of a fuel gun having an outer diameter equal to or smaller than a predetermined outer diameter, and fuel supplied from the fuel gun is fed to the fuel tank. A pipe, a reduced diameter portion formed on at least the other end of the oil supply pipe and having an inner diameter slightly larger than a predetermined outer diameter of the gun nozzle, and a pipe provided continuously to the other end of the oil supply pipe, A filler port for guiding the insertion into the filler pipe and holding the filler gun,
A guide means for guiding the insertion of the gun nozzle into the reduced diameter portion, the guide means having an opening hole provided in the oil supply port and allowing only the insertion of the gun nozzle having the predetermined outer diameter or less; It is characterized in that it comprises displacement means for enabling displacement of the gun nozzle in the radial direction of the oil supply port.

Therefore, when the gun nozzle of the refueling gun is inserted into the refueling pipe and refueling is started, the gap between the refueling pipe and the gun nozzle at the reduced diameter portion is small, so the atmosphere is sucked into the fuel tank together with the fuel. Is prevented as much as possible. As a result, the generation of fuel vaporized gas in the fuel tank is suitably suppressed. Further, the opening hole of the guide means which allows only the insertion of the gun nozzle having a predetermined outer diameter or less prohibits the erroneous insertion of the fuel supply gun for supplying the fuel other than the desired fuel, and prevents the inappropriate supply of the fuel. Further, since the position of the opening hole of the guide means follows the displacement of the filler hole of the gun nozzle in the radial direction, it is possible to guide the tip of the gun nozzle to the other end side of the reduced diameter portion and hold the filler gun in the filler port during refueling. Easy and reliable.

Further, in the invention of claim 2, the reduced diameter portion is an inner wall surface facing an oil supply stop sensor provided at a tip of the gun nozzle when the oil supply gun is inserted to a predetermined position of the oil supply port. It has a groove extending in the longitudinal direction of the oil supply pipe. Therefore, it is easier and more reliable to hold the refueling gun at the refueling port during refueling, and the detection hole of the refueling stop sensor of the refueling gun does not come into contact with the inner wall surface of the reduced diameter portion, and the fuel is removed. It reaches the detection hole satisfactorily through the groove, and the oil supply stop sensor functions reliably without malfunction.

Further, in the invention of claim 3, the guide means includes an elongated hole which is widened in the vertical direction and whose opening width in the lateral direction is slightly larger than the predetermined outer diameter. It is characterized by becoming. Therefore, with a simple structure, it is possible to easily and reliably guide the tip of the gun nozzle to the other end of the reduced diameter portion and hold the refueling gun at the refueling port during refueling.

Further, in the invention of claim 4, the guide means has the opening hole at the center, and the outer peripheral edge is joined to the inner wall surface of the oil supply port, and the opening hole of the elastic member. It is characterized by comprising a ring member buried along the periphery. Therefore, with a relatively simple structure, guiding the tip of the gun nozzle to the other end of the reduced diameter portion and holding the refueling gun at the refueling port during refueling are easy and reliable, and the atmosphere on the refueling pipe side is kept stable. Inflow is preferably prevented, and generation of fuel evaporative emission gas in the fuel tank is suitably suppressed.

Further, in the invention of claim 5, the guide means has a plate member having the opening hole at the center and an outer peripheral edge joined to an inner wall surface of the fuel filler port, and a diameter of the fuel filler port of the plate member. A frame member that guides displacement in a direction, and a spring member that is contracted between the plate member and the inner wall surface of the fuel filler port and biases the plate member toward the center of the fuel filler port. It has a feature.

Therefore, while the durability of the guide means is kept high, the guide of the tip of the gun nozzle to the other end of the reduced diameter portion and the holding of the refueling gun at the refueling port during refueling are easily and reliably performed, and the refueling is performed. The inflow of air to the pipe side is preferably prevented, and the generation of fuel evaporative gas in the fuel tank is suitably suppressed. Further, in the invention of claim 6, a fuel tank mounted on a vehicle for storing fuel supplied to the internal combustion engine of the vehicle, and one end of which is connected to the fuel tank and the other end of which has a predetermined outer diameter or less A fuel nozzle having an outer diameter capable of being inserted into a fuel nozzle and feeding a fuel supplied from the fuel gun to the fuel tank, and a fuel pipe formed at least at the other end of the fuel pipe, and having a predetermined size of the gun nozzle. A reduced diameter portion having an inner diameter slightly larger than an outer diameter, and a fuel filler port continuously provided at the other end of the fuel filler pipe for guiding insertion of the gun nozzle into the fuel filler pipe and holding the fuel gun. A guide means for guiding the insertion of the gun nozzle into the reduced diameter portion, the reduced diameter portion having an opening hole provided in the oil supply port and allowing only insertion of the gun nozzle having the predetermined outer diameter or less. Is It is characterized in that it consists of sexual material.

Therefore, due to the weight of the refueling gun, the tip of the gun nozzle elastically deforms the reduced diameter portion with the guide means as the fulcrum. This makes it easy and reliable to hold the refueling gun at the refueling port during refueling. Here, as an embodiment of the reduced diameter portion, it is preferable that one end is a cylindrical elastic material connected to the other end of the oil supply pipe and the other end extending to the oil supply port side.

According to the invention of claim 7, a fuel tank mounted on a vehicle for storing the fuel supplied to the internal combustion engine of the vehicle, and one end of which is connected to the fuel tank,
A gun nozzle of a refueling gun can be inserted into the other end, and a refueling pipe for feeding the fuel supplied from the refueling gun to the fuel tank and a second end of the refueling pipe are provided continuously to the gun nozzle. And a fueling port for holding the fueling gun and holding the fueling gun. At least the other end of the fueling pipe has an inner diameter slightly larger than the outer diameter of the gun nozzle, and the fueling gun. Includes a reduced diameter portion having a groove extending in the longitudinal direction of the oil supply pipe on the inner wall surface facing the oil supply stop sensor provided at the tip of the gun nozzle when the oil supply port is inserted to a predetermined position. Is characterized by.

Therefore, when the gun nozzle of the refueling gun is inserted into the refueling pipe and refueling is started, the gap between the refueling pipe and the gun nozzle at the reduced diameter portion is small, and the atmosphere is sucked into the fuel tank together with the fuel. Is prevented as much as possible. As a result, the generation of fuel vaporized gas in the fuel tank is suitably suppressed. Further, the groove provided on the inner wall surface of the reduced diameter portion prevents the detection hole of the fuel supply stop sensor of the fuel gun from coming into contact with the inner wall surface of the reduced diameter portion, and the fuel is well detected along the groove. Reaching the hole, the refueling stop sensor functions reliably without malfunction.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a fuel storage device according to the present invention will be described in detail below with reference to the accompanying drawings. First, the first embodiment will be described. FIG. 1 is a schematic configuration diagram of a first embodiment of a fuel storage device. As shown in FIG. 1, a fuel tank 1 is connected to an oil supply pipe (filler tube) 2. A fuel cutoff valve (FCV) 4 is mounted on the upper surface of the fuel tank 1 so as to project into the upper space thereof, regulate the maximum liquid level of fuel, and prevent fuel leakage during rollover. A vent hose 6 is connected to the FCV 4, and the vent hose 6 connects the fuel tank 1 and the canister 8. The canister 8 is a device for temporarily storing the fuel evaporative gas generated in the fuel tank 1 and then supplying it to the intake system of an engine (not shown) via the purge hose 7.
Since the structure and operation of the canister 8 are known, the description thereof is omitted here.

Reference numeral 10 in the figure denotes an oil supply port provided at the tip of the filler tube 2, that is, a filler neck. A fuel cap 12 is screwed into the open end 11 of the filler neck 10. Referring to FIG. 2, a cross section of the filler neck 10 is shown,
The structure around the filler neck 10 will be described with reference to FIG.

As shown in the figure, the neck body 14 of the tubular filler neck 10 having an inner diameter Db has an inner diameter Da.
It is externally fitted and closely fitted to the tip of the filler tube 2 having (for example, φ22 mm). As a result, the filler neck 10 and the filler tube 2 are integrated.
Here, the inner diameter Da of the filler tube 2 (for example, φ2
2 mm) is a value slightly larger than the tip outer diameter (for example, φ21.34 mm) of the gun nozzle (reference numeral 52 in FIG. 4) of the fuel refueling gun for unleaded gasoline (reference numeral 50 in FIG. 4). On the other hand, the inner diameter Db of the neck body 14 is set to a value sufficiently larger than the inner diameter Da (for example, φ22 mm) of the filler tube 2 so that the gun nozzle (reference numeral 52 in FIG. 4) can be easily inserted.

In the vicinity of the open end 11 of the neck body 14, a convex portion 16 is formed so as to spirally rise on the inner surface side. On the other hand, the fuel cap 12 has a convex portion 16 of the neck body 14.
The threaded portion 12a is formed so as to be screwed with the fuel cap 12, so that the fuel cap 12 is screwed into the open end 11 of the filler neck 10. A packing 13 is externally fitted to the end of the threaded portion 12a of the fuel cap 12, and the packing 13 is attached to a flange 18 formed to extend outward from the open end 11 when the fuel cap 12 is screwed. Abut. As a result, when the fuel cap 12 is closed, the fuel and the fuel evaporative gas in the fuel tank 1 are prevented from leaking to the outside from the opening end 11.

Inside the neck body 14, there is provided a truncated cone-shaped guide member (guide means) 20 for guiding the insertion of a gun nozzle 52 of a fuel supply gun 50 described later. As shown in the figure, the outer peripheral end of the guide member 20 is firmly sandwiched between the stop plate 22 and the neck body 14 which are annularly joined to the inner peripheral surface of the neck body 14 in parallel with each other. Thus, the guide member 20 is favorably held inside the neck body 14 without being displaced.

FIG. 3 is a sectional view taken along the line AA in FIG. As shown in FIG.
A circular opening portion (opening hole) 21 is provided at the center of. The opening diameter of the opening 21 is, for example, the same as the inner diameter Da (for example, φ22 mm) of the filler tube 2 and allows the fuel nozzle 50 of the fuel supply gun 50 for unleaded gasoline to penetrate therethrough. Outer diameter of the tip of the gun nozzle 52 of the supply gun 50 (for example, φ21.34 mm)
A fuel supply gun with a larger tip outer diameter cannot be penetrated. That is, a gun for leaded gasoline having a large tip outer diameter of, for example, φ23.63 mm (prescribed value for preventing leaded gasoline refueling) cannot penetrate through the opening 21. That is, this guide member 20 prevents the gun nozzle of the fuel supply gun for leaded gasoline from being inserted erroneously.

By the way, the guide member 20 is entirely made of a rubber material (elastic member) and is deformable. However, the gun nozzle 5 of the fuel supply gun 50
A ring-shaped ring (ring member) 23 made of a metal material such as steel is embedded in the inside of the peripheral edge of the opening 21 through which the opening 2 penetrates, and the ring 23 does not change the opening diameter of the opening 21. It is designed to be held constant. That is, even when the guide member 20 is deformed, the gun nozzle 52 can always satisfactorily penetrate the opening portion 21.

Further, inside the neck body 14, there is provided a lid 30 which is in contact with the peripheral edge of the opening 21 of the guide member 20 and can close the opening 21. More specifically, the lid 30 is rotatably attached to a bracket 32 joined to the inner wall surface of the neck body 14, and a lid spring 34 interposed between the lid 30 and the bracket 32.
Thus, normally, the opening 21 is urged to be closed.
The lid 30 prevents the fuel vaporized gas in the fuel tank 1 from leaking to the outside and invading foreign matter when the fuel cap 12 is opened. Also, for example,
The gun nozzle of the fuel supply gun for leaded gasoline that does not penetrate through the opening 21 of the guide member 20 is the neck body 14
Even when the leaded gasoline fuel is erroneously ejected from the gun nozzle, the fuel is prevented from accidentally flowing into the fuel tank 1.

In FIG. 2, the tapered portion 14a formed in the portion of the neck body 14 near the filler tube 2 serves as a guide for guiding the tip of the gun nozzle 52 of the fuel supply gun 50 into the filler tube 2. . Further, the end portion 2a of the filler tube 2 is chamfered, and the chamfered angle of the end portion 2a matches the taper angle of the tapered portion 14a. Therefore, the end portion 2a of the filler tube 2 also has a function of guiding the tip of the gun nozzle 52, similarly to the tapered portion 14a.

Further, as shown in FIG. 2, on the lower surface side of the inner wall of the tip portion (reduced diameter portion) 2c of the filler tube 2,
A groove 2b is formed extending in the longitudinal direction of the filler tube 2 over a predetermined range. 4 shows a cross section taken along the line BB in FIG. 2, the groove 2b has a constant width (for example, 10 mm) as shown in this figure. In FIG. 4, for convenience, a cross section of the gun nozzle 52 inserted into the filler tube 2 is also shown, but in this state, the detection hole 52a of the oil supply stop sensor provided near the tip of the gun nozzle 52 has the groove 2b. Will be faced with.

Referring to FIG. 5, there is shown a state in which the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline is inserted into the filler neck 10 configured as described above.
The operation of the first embodiment of the present invention will be described below with reference to FIG. First, the fuel supply gun 50 for unleaded gasoline is inserted into the filler neck 10 in the axial direction of the filler neck 10 as shown by the chain double-dashed line in the figure. At this time, the gun nozzle 52 penetrates the opening 21 (shown by the chain double-dashed line) of the guide member 20 while pushing the lid 30 open, and is guided by the tapered portion 14a while the guide member 20 is deformed to be guided by the filler tube. 2 is inserted securely. As described above, since the gun nozzle of the fuel supply gun for leaded gasoline, which is not for unleaded gasoline, has a large tip outer diameter, the opening 2 of the guide member 20 is completely absent.
Never penetrate 1. That is, this guide member 20
The fuel supply gun is properly identified by the above-mentioned method, and erroneous refueling of leaded gasoline is prevented. Further, even if leaded gasoline is ejected from the gun nozzle of the fuel supply gun for leaded gasoline in front of the guide member 20, the lid 30 still blocks the fuel flow path to the fuel tank 1 so that the leaded gasoline is still used. Wrong refueling is preferably prevented.

After that, when the gun nozzle 52 is inserted to an appropriate position in the filler tube 2, there is a slight gap between the inner wall surface of the filler tube 2 and the gun nozzle 52, and a groove 2b having a constant width is formed. Since it is provided, the inner fuel supply gun 50 moves favorably downward by its own weight as shown by the solid line in the figure. At this time, the guide member 20 made of a rubber material is made to follow the gun nozzle 52.
Is freely bent and deformed as shown by the solid line in the figure. Therefore, the fuel supply gun 50 is free to move downward without being restricted by the guide member 20. The spiral coil 5 wound around the gun nozzle 52
4 contacts the inner wall surface of the neck body 14, and the coil 54 engages with the convex portion 16 of the neck body 14. As a result, the fuel supply gun 50 is favorably held at the position of the filler neck 10 during refueling of the fuel, and the fuel supply gun 50 is prevented from accidentally falling off the filler neck 10.

Then, the handle 56 of the fuel supply gun 50
Is operated and fuel refueling proceeds, but at this time,
The gap between the outer diameter of the tip of the gun nozzle 52 and the inner wall surface of the filler tube 2 is small (for example, φ22 mm−φ21.3).
Since 4 mm = 0.66 mm), the amount of the atmosphere sucked into the fuel tank 1 with the supply of fuel is suppressed to a very small amount. As a result, the generation of fuel vaporized gas in the fuel tank 1 is suppressed as much as possible, and as a result, the burden on the canister 8 can be reduced, and the canister 8 can be downsized.

When refueling progresses and the fuel fills the fuel tank 1, the fuel also fills the filler tube 2. At this time, in order to prevent the fuel from being over-supplied and overflowing from the open end 11 of the filler neck 10, the fuel supply stop sensor provided in the fuel supply gun 50 operates to stop the fuel supply. More specifically, the fuel supply stop sensor stops the fuel supply when the fuel is sucked from the detection hole 52a near the tip of the gun nozzle 52 described above. From this, when the fuel overflows into the filler tube 2, it is necessary that the fuel surely comes into contact with the detection hole 52a.

With respect to this point, in the present invention, as described above, the groove 2b extending in the longitudinal direction of the filler tube 2 is formed on the inner wall surface of the tip portion 2c of the filler tube 2 so as to face the detection hole 52a. It is provided. This prevents the detection hole 52a from coming into close contact with the inner wall surface of the filler tube 2 directly, and further allows the fuel overflowing into the filler tube 2 to well trace back into the groove 2b. ing. Therefore, the fuel reaches the detection hole 52a favorably at an appropriate timing, and when the fuel fills the fuel tank 1, the refueling stop sensor operates reliably without malfunction and the fuel supply is appropriately stopped. become.

Next, the second embodiment will be described. In the description of the second embodiment, the same members and the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the members and parts different from the first embodiment will be described. Referring to FIG. 6, there is shown a cross-sectional view of a filler neck (fuel filler port) 10 ′ corresponding to the filler neck 10 in the first embodiment, and the configuration around the filler neck 10 ′ will be described below based on FIG. .

Inside the neck body 14, the fuel supply gun 5
A guide unit (guide means) 70 for guiding the insertion of the zero gun nozzle 52 is provided. As shown in the figure, the guide unit 70 is formed in an annular shape and has a frame member 72 in which a circular opening 71 is formed in the center. The frame member 72 has a peripheral edge at the neck body 14
Is joined to the inner peripheral surface of. A taper portion 72a is formed on the frame member 72, and the taper portion 72a has a function of guiding the gun nozzle 52.

Further, the frame member 72 is provided with a concave portion 73 which is open in the axial direction of the neck body 14 and has a U-shaped cross section. A plate-shaped guide member 76 is fitted in the recess 73 via four coil springs (spring members) 74. The guide member 76 is slidable in the recess 73 in a plane perpendicular to the axial direction of the neck body 14.

FIG. 7 is a sectional view taken along the line CC in FIG. 6. As shown in FIG.
Is a circular plate member having an outer diameter smaller than the inner diameter of the neck body 14, and has four notches 76 at its outer peripheral end.
a is provided. These notches 76a are located on the respective dividing points of the four equally divided outer peripheral edges. Then, the respective ends of the four coil springs 74 are inserted into the notches 76a. As a result, the coil springs 74 are arranged in a well-balanced manner, and even if the other ends of the coil springs 74 are not fixed to the frame member 72 but merely abut, the coil springs 74 are notched. It is possible to maintain its own position without deviating from 76a. In this way, the guide member 76 is well balanced by the biasing forces of these four coil springs 74, and is in a state of floating in the central portion of the neck body 14.

A circular opening portion (opening hole) 77 is provided at the center of the guide member 76. This opening 77
The opening diameter of the filler tube 2 is the same as the opening 21 of the guide member 20 in the first embodiment.
Although the opening diameter is the same as (for example, φ22 mm) and allows penetration of the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline, the gun nozzle 52 of this fuel supply gun 50
The fuel supply gun for leaded gasoline having a tip outer diameter (eg, φ23.63 mm) larger than the tip outer diameter (eg, φ21.34 mm) is not pierceable. That is, the guide member 77 also prevents the gun nozzle of the fuel supply gun for leaded gasoline from being erroneously inserted. This opening 77
Normally, the guide member 76 is floated in a well-balanced manner by the urging forces of the coil springs 74, so that the center of the guide member 76 coincides with the axis of the neck body 14.

A taper portion 76 is provided on the periphery of the opening 77.
The taper portion 76b has a function of guiding the gun nozzle 52, like the taper portion 72a. Referring to FIG. 8, the guide unit 7
A modification of 0 is shown in cross section. Hereinafter, modified examples of the guide unit 70 will be described.

In the case of this modification, a pair of parallel portions 76 cut parallel to each other are provided at both ends of the guide member 76.
c and 76c are formed. On the other hand, in the frame member 72,
A pair of parallel members 72b and 72b which are also parallel to each other are provided, and the parallel portions 76c and 76c are slidable along the parallel members 72b and 72b. And
Of the outer peripheral ends of the guide member 76, the parallel portions 76c, 76c
A pair of notches 76a, 76a are provided in a position parallel to and on a line passing through the center of the guide member 76, and one ends of the coil springs 74 are inserted into the notches 76a, 76a, respectively. That is, in the case of this modification, the guide member 76 is balanced and held by the biasing forces of the two coil springs 74 so that the center of the opening 77 and the axis of the neck body 14 coincide with each other. As for the sliding direction within the recess 73, the parallel members 72b, 7
2b allows only one direction (here, the vertical direction).

Referring again to FIG. 6, inside the neck body 14, the side surface 72c of the frame member 72 of the guide unit 70 is provided.
A lid 30 ′ that is capable of closing the opening 71 by being brought into contact therewith is provided. More specifically, the lid 30 'is rotatably attached to a bracket 32' joined to the inner wall surface of the neck body 14 in the same manner as the lid 30 in the case of the first embodiment. The lid spring 34 'interposed between the 32' and the opening 32 'provides an opening 71
Is urged to close the. The function of this lid 30 ′ is similar to that of the lid 30 described above, and a description thereof will be omitted here.

Referring to FIG. 9, there is shown a state in which the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline is inserted into the filler neck 10 'constructed as described above. The operation of the second embodiment of the invention will be described. First, the fuel supply gun 50 for unleaded gasoline
Is inserted into the filler neck 10 'in the axial direction of the filler neck 10' as shown by the chain double-dashed line in the figure.
At this time, the gun nozzle 52 pushes open the lid 30 ′ and opens the opening 77 of the guide member 76 (shown by a chain double-dashed line).
And is reliably inserted into the filler tube 2 with the displacement of the guide member 76. As described above, the gun nozzle of the fuel supply gun for unleaded gasoline, which is not for unleaded gasoline, does not penetrate the opening 77 of the guide member 76 at all because of its large tip outer diameter. That is, also in the case of the second embodiment, the fuel supply gun is properly identified by the guide member 76, and the erroneous refueling of leaded gasoline is prevented. Further, even if leaded gasoline is ejected from the gun nozzle of the fuel supply gun for leaded gasoline in front of the guide member 76, the lid 30 ′ blocks the fuel flow path to the fuel tank 1 and the leaded gasoline is still present. Wrong refueling is preferably prevented.

After that, when the gun nozzle 52 is inserted to an appropriate position in the filler tube 2, the fuel supply gun 5
0 moves downward by its own weight as shown by the solid line in the figure. At this time, so as to follow the gun nozzle 52,
The guide member 76 slides in the recess 73 against the biasing force of the coil spring 74 as shown by the solid line in the figure. As a result, the fuel supply gun 50 is free to move downward without being restricted by the guide member 76. The coil 54 around the gun nozzle 52 is attached to the neck body 14
The fuel supply gun 50 is held at the position of the filler neck 10 ′ in good condition by abutting the inner wall surface of the fuel tank and engaging the convex portion 16 of the neck body 14. Therefore, the fuel supply gun 50 is prevented from accidentally falling off the filler neck 10 'during refueling.

Also in the second embodiment, the groove 2b provided in the tip portion 2c of the filler tube 2 functions well as in the case of the first embodiment, and the refueling stop sensor is reliably operated without malfunction. The fuel supply is suitably stopped by working, but the description is omitted here to avoid duplication.
Next, a third embodiment will be described.

Also in the description of the third embodiment, the same members and parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted, and only the members and parts different from the first embodiment will be omitted. Describe. Referring to FIG. 10, the first
A cross-sectional view of a filler neck (fuel filler port) 10 ″ corresponding to the filler neck 10 in the embodiment is shown, and the configuration around the filler neck 10 ″ will be described below based on FIG. 10.

Inside the neck body 14, the fuel supply gun 5
A guide member (guide means) 90 for guiding the insertion of the zero gun nozzle 52 is provided. As shown in the figure, the guide member 90 is formed in an annular shape, and its peripheral edge is joined to the inner peripheral surface of the neck body 14. Reference numeral 94 in the drawing is a tapered portion, and this tapered portion 94 has a function as a guide for the gun nozzle 52.

FIG. 11 is a sectional view taken along the line EE in FIG. 10. As shown in FIG.
At the center of 0, an elongated hole-shaped opening (opening hole) 92 is formed. The width of the opening 92 is the same as the inner diameter Da (for example, φ22 mm) of the filler tube 2 like the opening diameter of the opening 21 of the guide member 20 in the first embodiment. Therefore, although the opening 92 allows the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline to penetrate therethrough, the gun nozzle 52 of the fuel supply gun 50 does not.
The fuel supply gun for leaded gasoline having a tip outer diameter (for example, φ23.63 mm) larger than the tip outer diameter (for example, φ21.34 mm) cannot be penetrated. In other words, the guide member 90 also prevents the gun nozzle of the fuel supply gun for leaded gasoline from being erroneously inserted.

Further, inside the neck body 14, there is provided a lid 30 "that abuts on the peripheral edge of the opening 92 of the guide member 90 and can close the opening 92. More specifically, the lid 30" is the above-mentioned lid. Similar to the lid 30 of the first embodiment, the bracket 3 joined to the inner wall surface of the neck body 14
A lid spring 3 rotatably mounted on a 2 "and interposed between a lid 30" and a bracket 32 ".
4 "is normally urged to close the opening 92. The function of the lid 30" is the same as that of the lid 30 described above.

The operation of the third embodiment will be described below. In addition, here is a fuel supply gun 5 for unleaded gasoline.
The insertion state of the gun nozzle 52 of No. 0 will be described with reference to FIG. 5 or FIG. When the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline is inserted into the filler neck 10 ″ through the opening 92 of the guide member 90 and the tip of the gun nozzle 52 is inserted to an appropriate position of the filler tube 2, The supply gun 50 moves downward due to its own weight (see FIGS. 5, 9 and 10).
The gun nozzle 52 has a cross section shown for convenience.
Moves in the direction of the long hole in the opening 92 from the position indicated by the chain double-dashed line to the position indicated by the solid line. Therefore, the fuel supply gun 50 is free to move downward without being restricted by the guide member 90. Then, the coil 54 around the gun nozzle 52 abuts on the inner wall surface of the neck body 14 and further engages with the convex portion 16 of the neck body 14, so that the fuel supply gun 50 is favorably held at the filler neck 10 ″ position. Therefore, the fuel supply gun 50 is prevented from accidentally falling off the filler neck 10 ″ during refueling.

Also in the third embodiment, it goes without saying that the groove 2b provided in the tip portion 2c of the filler tube 2 functions well as in the case of the first embodiment. Next, a fourth embodiment will be described. Also in the description of the fourth embodiment, the same members and the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the members and the parts different from the first embodiment will be described.

Referring to FIG. 12, there is shown a sectional view of a filler neck (fuel filler port) 100 corresponding to the filler neck 10 in the first embodiment. Hereinafter, the structure around the filler neck 100 will be described with reference to FIG. To do. Inside the neck body 104, a guide member 110 for guiding the insertion of the gun nozzle 52 of the fuel supply gun 50 is provided. As shown in the figure, the guide member 110 is
It is formed in an annular shape, and a circular opening (opening hole) 112 is formed in the center thereof. And the guide member 1
The peripheral edge of 10 is joined to the inner wall surface of the neck body 104. Reference numeral 114 in the drawing is a tapered portion, and this tapered portion 114 has a function as a guide for the gun nozzle 52.

The opening diameter of the opening 112 is the same as the opening diameter of the opening 21 of the guide member 20 in the first embodiment.
It has the same diameter as the inner diameter Da of the filler tube 2 (for example, φ22 mm). Therefore, although the opening 112 allows the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline to penetrate, the gun nozzle 5 of the fuel supply gun 50
A fuel supply gun for leaded gasoline having a tip outer diameter (eg, φ23.63 mm) larger than the tip outer diameter of 2 (eg, φ21.34 mm) cannot be penetrated. That is, this guide member 110 also prevents the gun nozzle of the fuel supply gun for leaded gasoline from being erroneously inserted.

Further, inside the neck body 104, the neck 112 is brought into contact with the peripheral edge of the opening 112 of the guide member 110, and the opening 112
A lid 30 that can close the cover is provided. The lid 30 is the same as the lid 30 of the first embodiment. As shown in the figure, the neck body 104 is externally fitted and closely fitted to the tip of the filler tube 102 having the inner diameter Da (for example, φ22 mm) as described above. The filler tube 102 has a filler tube 2
A groove 102b similar to the groove 2b provided at the tip portion 2c of the is provided.

By the way, in the case of the fourth embodiment, a relief portion 102c is formed at the tip of the filler tube 102. A tube (reduced diameter portion) 120 made of a rubber material is fitted into the relief portion 102c. Here, the inner diameter of the tube 120 is the same as the inner diameter of the filler tube 102, that is, the inner diameter Da (for example, φ22 m
m). On the inner wall surface of the tube 120, a groove 122 that extends in the longitudinal direction of the tube 120 and is similar to the groove 102b is formed on the extension of the groove 102b. Further, the tip end portion 124 of the tube 120 is widened outward so that the tip end of the gun nozzle 52 is surely inserted.

The operation of the fourth embodiment will be described below. As shown in FIG. 12, when the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline is inserted in the axial direction of the filler neck 100 as indicated by the chain double-dashed line in the figure, the gun nozzle 52 causes the lid 30 to move. While pushing it open, it penetrates through the opening 112 of the guide member 110,
It is inserted within 0 (two-dot chain line). Here, the gun nozzle of the fuel supply gun for leaded gasoline, which is not for unleaded gasoline, has no guide member 110 as in the above-described embodiments.
Does not penetrate through the opening 112.

Thereafter, the gun nozzle 52 is attached to the tube 120.
When it is inserted to the proper position inside, the fuel supply gun 50
Moves downward by its own weight as shown by the solid line in the figure. At this time, the gun nozzle 52 swings around the guide member 110 as a fulcrum. At the same time, the tip of the gun nozzle 52 elastically deforms the tube 120 as shown by the solid line. Therefore, the fuel supply gun 50 freely swings around the guide member 110, the coil 54 wound around the gun nozzle 52 abuts on the inner wall surface of the neck body 104, and the convex portion of the neck body 104 further. Engaged with 106, the fuel supply gun 50 is better retained in the filler neck 100 position. Therefore, the fuel supply gun 50 is prevented from accidentally falling off the filler neck 100 during refueling.

In the fourth embodiment, the groove 122 provided in the tube 120 prevents the detection hole 52a from coming into close contact with the inner wall surface of the tube 120.
When the fuel also fills the filler tube 102, the fuel is supplied to the groove 102b and the groove 12b.
We will go back well within 2. As a result, the fuel reaches the detection hole 52a at an appropriate timing, and in this case as well, the fuel supply stop sensor reliably operates without malfunction and the fuel supply is appropriately stopped.

As described above in detail based on the first to fourth embodiments, in the fuel storage device of the present invention, the filler tube 2 (first to third embodiments) or the tube 12 is used.
Grooves 2b and 102b are provided on the inner wall surface of No. 0 (fourth embodiment) so as to face the detection hole 52a of the fuel supply stop sensor provided at the tip of the gun nozzle 52 of the fuel supply gun 50. Therefore, as in the conventional case, the inner diameter of the filler tube 2 or the tube 120 is set to the outer diameter of the tip of the gun nozzle 52 of the fuel supply gun 50 for unleaded gasoline (for example, φ2.
Inner diameter Da slightly larger than 1.34 mm (eg φ
(22 mm) and the filler tube 2 or tube 1 while avoiding sucking the atmosphere as much as possible during refueling.
It is possible to favorably bring the fuel that goes back 20 into contact with the detection hole 52a. Accordingly, when the fuel fills the fuel tank 1, the refueling stop sensor is reliably operated to prevent over-refueling, and the filler neck 10, 10 ′, 10 ″ (first to third embodiments) or the filler neck 100 (first embodiment) is provided. It is possible to prevent fuel from overflowing from the fourth embodiment).

Further, according to the fuel storage device of the present invention,
The guide member 20 provided with the grooves 2b and 102b and provided inside the filler neck 10 is formed by a rubber material so as to be deformable (first embodiment), or a guide unit provided inside the filler neck 10 '. The guide member 76 of 70 is suspended by the coil spring 74 (second embodiment), and the opening 92 of the guide member 90 provided inside the filler neck 10 "is formed into a long hole (third embodiment). Alternatively, a tube 120 made of a deformable rubber material is provided at the tip of the filler tube 102 (fourth embodiment), so that the insertion of the gun nozzle of the fuel supply gun for leaded gasoline is blocked and leaded. Fuel for unleaded gasoline without restriction by the inner diameter of the filler tube 2 and the guide members 20, 76, 90, 110 while surely preventing accidental refueling of gasoline. The gun nozzle 52 of the supply gun 50 can be easily moved or swung within the filler neck 10, 10 ', 10 ", 100. As a result, the tip of the gun nozzle 52 can be suitably guided to the filler tubes 2 and 102, and the fuel discharged from the gun nozzle 52 overflows in the filler necks 10, 10 ', 10 ", 100 and deteriorates oil supply performance. In addition, the spiral coil 5 wrapped around the gun nozzle 52.
4 is preferably engaged with the convex portion 16 of the neck body 14, and the fuel supply gun 50 is connected to the filler neck 10, 10 ', 10 ",
It can be favorably held at 100 positions. Therefore, in the fuel storage device of the present invention, the tip of the gun nozzle 52 is guided to the filler tubes 2 and 102 reliably and smoothly even when the fuel supply gun 50 in which the bending angle of the gun nozzle 52 is slightly different is used. As a result, the fuel supply gun 50 is held by the filler necks 10, 10 ', 10 ", 100 without deteriorating the fuel refueling property.
It is prevented from falling off from 10 ', 10'', 100.

In each of the above-described embodiments, the neck bodies 14, 10 of the filler necks 10, 10 ', 10 ", 100 are used.
4 and the filler tube 2 and 102 are formed as separate members for convenience of maintenance such as replacement of the filler neck 10, 10 ', 10 ", 100.
4, 104 may be a continuous member from the filler tube 2, 102.

[0062]

According to the fuel storage device of the first aspect of the present invention, a fuel tank mounted on a vehicle for storing fuel supplied to the internal combustion engine of the vehicle and one end of which is connected to the fuel tank , A gun nozzle of a fueling gun having an outer diameter equal to or less than a predetermined outer diameter can be inserted into the other end, and a fueling pipe for feeding fuel supplied from the fueling gun to a fuel tank is formed on at least the other end of the fueling pipe. A reduced diameter portion having an inner diameter slightly larger than a predetermined outer diameter of the gun nozzle, and a fuel filler port continuously provided at the other end of the fuel filler pipe for guiding the insertion of the gun nozzle into the fuel filler pipe and holding the fuel filler gun. A guide means for guiding the insertion of the gun nozzle into the reduced diameter portion, which has an opening hole which is provided in the oil supply opening and allows only the insertion of the gun nozzle having a predetermined outer diameter or less, and the guide means is the oil supply opening of the gun nozzle. In the radial direction Because comprising displacement means allowing the displacement, suitably suppress the occurrence of fuel vapor in the fuel tank to reduce the amount of air which is sucked with the fuel,
Further, the guide means that allows only the insertion of a gun nozzle having a predetermined outer diameter or less prevents the erroneous insertion of a fuel supply gun for supplying a fuel other than the desired fuel, while the position of the opening hole of the guide means is set to the position of the fuel nozzle of the gun nozzle. It is possible to follow the displacement in the radial direction, and it is possible to easily and reliably guide the tip of the gun nozzle to the other end of the reduced diameter portion and hold the refueling gun at the refueling port during refueling. Therefore, the gun nozzle is not forcibly inserted into the oil supply pipe, and the gun nozzle and the oil supply pipe can be prevented from being damaged.

According to the fuel storage device of the second aspect,
The reduced-diameter portion has a groove extending in the longitudinal direction of the fueling pipe on the inner wall surface facing the fueling stop sensor provided at the tip of the gun nozzle when the fueling gun is inserted to a predetermined position of the fueling port. The refueling gun can be held in the refueling port more easily and reliably, and the refueling stop sensor can surely function without malfunction.

According to the fuel storage device of claim 3,
The guide means includes a slotted opening hole which is widened in the vertical direction and whose lateral opening width is slightly larger than a predetermined outer diameter. Therefore, the guide means has a simple structure and the gun nozzle tip has a reduced diameter. It is possible to easily and surely guide the other end of the section to the other end and hold the refueling gun at the refueling port during refueling. Further, according to the fuel storage device of claim 4, the guide means has an opening hole in the center, and an outer peripheral edge is joined to the inner wall surface of the fuel filler, and an elastic member is provided along the peripheral edge of the opening hole of the elastic member. Since it is composed of an embedded ring member, it has a relatively simple structure and can easily and reliably guide the tip of the gun nozzle to the other end of the reduced diameter portion and hold the refueling gun at the refueling port during refueling. The generation of fuel evaporative emission in the fuel tank can be suitably suppressed by restricting the inflow of the atmosphere into the fuel supply pipe side.

According to the fuel storage device of the fifth aspect,
The guide means includes a plate member having an opening hole in the center, a frame member whose outer peripheral edge is joined to an inner wall surface of the filler port, and which guides the radial displacement of the filler port of the plate member, and the plate member and the filler port. Since it consists of a spring member that is compressed between the inner wall surface and biases the plate member toward the center of the oil supply port, while maintaining high durability of the guide means, it moves to the other end side of the reduced diameter portion of the gun nozzle tip. Guide and holding of the refueling gun in the refueling port during refueling can be easily and reliably performed, and further, the inflow of the atmosphere into the refueling pipe side can be restricted to suitably suppress the generation of fuel evaporative gas in the fuel tank. .

According to the fuel storage device of the sixth aspect,
A fuel tank that is installed in a vehicle and stores fuel supplied to the internal combustion engine of the vehicle, and one end of which is connected to the fuel tank, and the other end of which is provided with a gun nozzle of a refueling gun having an outer diameter of a predetermined outer diameter or less A fueling pipe that is capable of feeding fuel supplied from a fueling gun to a fuel tank, and a reduced diameter portion that is formed at least at the other end of the fueling pipe and that has an inner diameter slightly larger than the predetermined outer diameter of the gun nozzle, A fuel supply port that is provided continuously to the other end of the fuel supply pipe to guide the insertion of the gun nozzle into the fuel supply pipe and holds the fuel supply gun, and only the insertion of a gun nozzle that is provided in the fuel supply port and has a predetermined outer diameter or less Since the reduced diameter portion is made of an elastic material, the reduced diameter portion is elastically deformed, so that the refueling gun is provided with a guide means for guiding the insertion of the gun nozzle into the reduced diameter portion. Gunno due to its own weight It can be swung Le to the guide means around, it holding for the filler opening of the oil supply gun during refueling easily and reliably. Therefore, the gun nozzle is not forcibly inserted into the oil supply pipe, and the gun nozzle and the oil supply pipe can be prevented from being damaged.

According to the fuel storage device of claim 7,
A fuel tank that is mounted on a vehicle and stores fuel to be supplied to the internal combustion engine of the vehicle and one end of which is connected to the fuel tank, and the other end of which is provided with a gun nozzle of a refueling gun that is supplied from the refueling gun. A fuel supply pipe for supplying fuel to the fuel tank, and a fuel supply port continuously provided at the other end of the fuel supply pipe for guiding the insertion of the gun nozzle into the fuel supply pipe and holding the fuel supply gun. At least on the other end,
It has an inner diameter that is slightly larger than the outer diameter of the gun nozzle, and when the refueling gun is inserted to the prescribed position of the refueling port, the refueling stop sensor provided at the tip of the gun nozzle faces the inner wall surface facing the refueling pipe in the longitudinal direction. Since it includes a reduced diameter portion having an extending groove, the amount of the atmosphere sucked together with the fuel is reduced, and the generation of fuel evaporative gas in the fuel tank is suitably suppressed, while the inner wall surface of the reduced diameter portion is reduced. The groove provided allows the refueling stop sensor to function reliably without malfunction.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a fuel storage device according to the present invention.

FIG. 2 is a detailed cross-sectional view showing the periphery of the filler neck of the first embodiment.

FIG. 3 is a cross-sectional view showing a guide member taken along the line AA in FIG.

4 is a cross-sectional view taken along the line BB in FIG.

FIG. 5 is an explanatory diagram showing the operation of the first embodiment.

FIG. 6 is a detailed sectional view showing the periphery of the filler neck of the second embodiment.

7 is a cross-sectional view showing the guide unit taken along the line CC in FIG.

8 is a cross-sectional view showing a modified example of the guide unit taken along the line CC in FIG.

FIG. 9 is an explanatory diagram showing the operation of the second embodiment.

FIG. 10 is a detailed cross-sectional view showing the periphery of the filler neck of the third embodiment.

11 is a cross-sectional view showing a guide member taken along the line EE in FIG.

FIG. 12 is a cross-sectional view showing the configuration and action around the filler neck according to the fourth embodiment.

[Explanation of symbols]

1 fuel tank 2 Filler tube (oil supply pipe) 2b groove 2c Tip (reduced diameter part) 8 canisters 10,10 ', 10 "Filler neck (refueling port) 14 neck body 16 convex 20 Guide member (guide means) 21 Opening part (opening hole) 23 Ring (ring member) 30,30 ', 30 "lid 50 refueling gun 52 gun nozzle 52a detection hole 54 coils 70 Guide unit (guide means) 72 Frame member 74 Coil spring (spring member) 76 Guide member (plate member) 77 Opening (Opening hole) 90 Guide member (guide means) 92 Opening (opening hole) 100 Filler neck (refueling port) 110 Guide member (guide means) 112 Opening part (opening hole) 120 tube (reduced diameter part) 122 groove

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichiro Ando, 5-3-8, Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (56) References: 63-75428 (JP, U) Hei 1-76325 (JP, U) Actual development Sho 63-61337 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60K 15/04

Claims (7)

(57) [Claims] 1. A fuel tank mounted on a vehicle for storing fuel to be supplied to an internal combustion engine of the vehicle, one end of which is connected to the fuel tank and the other end of which has an outer diameter not larger than a predetermined outer diameter. A gun nozzle of a refueling gun is insertable, and a refueling pipe for feeding fuel supplied from the refueling gun to the fuel tank; and a refueling pipe formed at least at the other end of the refueling gun, having a predetermined outer diameter of the gun nozzle or more. A reduced diameter portion having a slightly larger inner diameter, a filler opening continuously provided at the other end of the filler tube for guiding the insertion of the gun nozzle into the filler tube and holding the filler gun; And a guide means for guiding the insertion of the gun nozzle into the reduced diameter portion, the guide means having an opening hole that allows only the insertion of the gun nozzle having the predetermined outer diameter or less, and the guide means. Fuel storage apparatus characterized by comprising a displacement means allowing the displacement in the radial direction of the fuel supply port of the nozzle. 2. The reduced diameter portion has a longitudinal direction of the oil supply pipe on an inner wall surface facing an oil supply stop sensor provided at a tip of the gun nozzle when the oil supply gun is inserted to a predetermined position of the oil supply port. 2. The fuel storage device according to claim 1, wherein the fuel storage device has a groove extending to the. 3. The guide means includes an elongated opening hole which is widened in the vertical direction and has an opening width in the lateral direction slightly larger than the predetermined outer diameter. The fuel storage device according to claim 1. 4. The elastic member having the opening hole at the center, the outer peripheral edge of which is joined to the inner wall surface of the oil supply port, and the ring embedded along the peripheral edge of the opening hole of the elastic member. The fuel storage device according to claim 1 or 2, comprising a member. 5. The guide means has a plate member having the opening hole at the center and an outer peripheral edge joined to an inner wall surface of the fuel filler port, and guides a displacement of the plate member in the radial direction of the fuel filler port. 2. A frame member, and a spring member that is provided between the plate member and the inner wall surface of the fuel filler port in a contracted manner and biases the plate member toward the center of the fuel filler port. Or the fuel storage device according to 2. 6. A fuel tank mounted on a vehicle for storing fuel to be supplied to an internal combustion engine of the vehicle, one end of which is connected to the fuel tank and the other end of which has an outer diameter not larger than a predetermined outer diameter. A gun nozzle of a refueling gun is insertable, and a refueling pipe for feeding fuel supplied from the refueling gun to the fuel tank; and a refueling pipe formed at least at the other end of the refueling gun, having a predetermined outer diameter of the gun nozzle or more. A reduced diameter portion having a slightly larger inner diameter, a filler opening continuously provided at the other end of the filler tube for guiding the insertion of the gun nozzle into the filler tube and holding the filler gun; A guide means for guiding the insertion of the gun nozzle into the reduced diameter portion, the reduced diameter portion being made of an elastic material. From Fuel storage apparatus according to claim Rukoto. 7. A fuel tank mounted on a vehicle for storing fuel to be supplied to an internal combustion engine of the vehicle; one end of which is connected to the fuel tank, and the other end of which is provided with a gun nozzle of a refueling gun. An oil supply pipe for supplying the fuel supplied from the fuel supply gun to the fuel tank; and a fuel supply pipe continuously provided at the other end of the fuel supply pipe for guiding the insertion of the gun nozzle into the fuel supply pipe and the fuel supply gun. And a refueling port for holding the refueling pipe, wherein at least the other end of the refueling pipe has an inner diameter slightly larger than the outer diameter of the gun nozzle, and when the refueling gun is inserted to a predetermined position of the refueling port. And a reduced diameter portion having a groove extending in the longitudinal direction of the oil supply pipe on the inner wall surface facing the oil supply stop sensor provided at the tip of the gun nozzle.