JP6237014B2 - Vehicle fuel tank - Google Patents

Description

  The present invention relates to a vehicle fuel tank.

Vehicles such as automobiles and two-wheeled vehicles that use an internal combustion engine as a drive source are equipped with vehicle fuel tanks that store fuel (see Patent Documents 1 and 2).
By the way, for the purpose of recycling the vehicle or for the purpose of using the fuel in the vehicle fuel tank for other devices and equipment, it is conceivable to use the fuel pump to extract the fuel in the vehicle fuel tank.
Here, the oil supply pump is a manual pump used to supply oil to the oil stove. The manual pump unit, a linear suction pipe and a flexible discharge pipe connected to the pump unit are provided. And.
In general, the bottom wall of a fuel tank for a vehicle often extends substantially flat along a horizontal plane.
Therefore, when the suction pipe of the fuel pump is inserted into the fuel tank for a vehicle from the fuel inlet and the fuel is sucked and the liquid level of the fuel is close to the bottom wall, the fuel flows along the bottom wall in the fuel tank for the vehicle. And remain shallow. It is difficult to completely remove the fuel having a low liquid level from the bottom wall using the fuel pump, and the fuel remains in the vehicle fuel tank.

Japanese Utility Model Publication No. 60-199298 JP-A-7-224728

For this reason, when the fuel in the vehicle fuel tank is completely extracted, a flexible rubber hose is inserted into the vehicle fuel tank, and the rubber hose is uniformly moved along the bottom wall of the vehicle fuel tank. It requires a lot of labor, either by suctioning or drawing, or by temporarily removing the fuel piping of the vehicle fuel tank and drawing the fuel.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle fuel tank that is advantageous in easily and reliably extracting fuel from the vehicle fuel tank.

In order to achieve the above object, the invention according to claim 1 is a vehicle fuel tank having a fuel filler opening and a bottom wall, and the bottom wall is recessed below the bottom surface portion and the bottom surface portion. The liquid reservoir portion is disposed at a location where a linear suction pipe of the oil pump inserted from the oil filler port can reach the bottom portion of the liquid reservoir portion, and an opening is formed in the bottom surface portion. A connecting pipe is provided to connect the liquid reservoir and the opening .
A second aspect of the present invention is the vehicle fuel tank according to the first aspect, wherein the bottom surface portion is formed so that a portion where the liquid reservoir portion is provided is deepest.
According to a third aspect of the present invention, the liquid reservoir portion is formed by the bottom portion positioned below the bottom surface portion, and a first peripheral wall that stands up from the periphery of the bottom portion and connects to the bottom surface portion, A second peripheral wall is provided inside the first peripheral wall at a distance from the first peripheral wall, and the second peripheral wall is formed to allow fuel to flow between the inner side and the outer side, The vehicle fuel tank according to claim 1, wherein the suction pipe is inserted inside the second peripheral wall.
Fourth aspect of the present invention, in the liquid reservoir, one of claims 1 to 3, characterized in that inclined surfaces to increase gradually the cross-sectional area of the liquid reservoir as it approaches the bottom portion is provided A vehicle fuel tank according to claim 1.

According to the first aspect of the present invention, the fuel in the vehicle fuel tank can be easily and reliably removed by inserting the intake pipe of the oil supply pump into the liquid reservoir of the vehicle fuel tank from the oil supply port and sucking the fuel. Can be extracted.
Further, the fuel on the bottom surface smoothly flows into the liquid reservoir through the connecting pipe. Therefore, the fuel can smoothly flow into the liquid reservoir in the vehicle fuel tank, and the fuel can be sucked smoothly by the fuel pump.
According to the second aspect of the present invention, the bottom surface portion is formed so that the portion where the liquid pool portion is provided is deepest, which is advantageous for reliably removing the fuel.
According to the third aspect of the present invention, since the second peripheral wall through which the fuel flows is disposed between the first peripheral wall of the liquid reservoir and the suction pipe of the fuel pump, the liquid reservoir is contained in the vehicle fuel tank. The fuel can smoothly flow into the section, and the fuel can be sucked smoothly by the fuel pump.
According to the fourth aspect of the present invention, since the fuel on the bottom surface smoothly flows into the liquid reservoir along the inclined surface, it is advantageous to efficiently extract the fuel in the vehicle fuel tank by the fuel pump. . In addition, since the inclined surface guides the tip of the suction pipe of the oil supply pump to the bottom of the liquid reservoir, it is advantageous in facilitating the insertion work into the liquid reservoir of the suction pipe.

It is sectional drawing which shows the structure of the fuel tank for vehicles in 1st Embodiment. It is sectional drawing which shows the structure of the fuel tank for vehicles in 2nd Embodiment. It is sectional drawing which shows the structure of the liquid reservoir part of the fuel tank for vehicles in 3rd Embodiment. It is sectional drawing which shows the structure of the fuel tank for vehicles in 4th Embodiment. It is sectional drawing which shows the structure of the fuel tank for vehicles in 5th Embodiment. It is sectional drawing which shows the structure of the liquid reservoir part of the fuel tank for vehicles in 6th Embodiment. It is a figure which shows the structure of an oil supply pump.

(First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings.
First, the configuration of a fuel pump that draws fuel from a vehicle fuel tank will be described.
As shown in FIG. 7, the oil supply pump 2 includes a pump unit 3, a suction pipe 4, and a discharge pipe 6.
The pump unit 3 performs a pumping action by changing the volume by a hand-opening operation.
The suction pipe 4 is configured by a straight pipe connected to the pump unit 3, and sucks fuel by the pump action of the pump unit 3.
The discharge pipe 6 is composed of a flexible pipe connected to the pump unit 3, and sends out fuel sucked by the pump unit 3.

FIG. 1 is a cross-sectional view showing a configuration of a vehicle fuel tank according to a first embodiment.
The vehicle fuel tank 10 </ b> A includes a bottom wall 12, a side wall 14 rising from the bottom wall 12, and a top wall 16 that connects the upper part of the side wall 14. A storage space S for storing fuel is formed.
The bottom wall 12 includes a bottom surface portion 13 that extends flat along a horizontal plane and a liquid reservoir portion 18.
The upper wall 16 is provided with an oil supply port 20 for supplying the fuel F to the storage space S, and the oil supply port 20 is provided with a cap 22 for opening and closing the oil supply port 20.

The liquid reservoir 18 is disposed at a location where the suction pipe 4 of the oil pump 2 inserted from the oil supply port 20 can reach the bottom 1810 of the liquid reservoir 18.
In the present embodiment, the liquid reservoir portion 18 is formed at a location of the bottom surface portion 13 immediately below the fuel filler opening 20 so as to be recessed below the bottom surface portion 13.
The liquid reservoir portion 18 is formed by a bottom portion 1810 located below the bottom surface portion 13 and a cylindrical first peripheral wall 1812 that stands up from the periphery of the bottom portion 1810 and connects to the bottom surface portion 13.
That is, the bottom surface portion 13 is formed so that the portion where the liquid reservoir portion 18 is provided is deepest. Thereby, it is aimed at becoming advantageous in extracting fuel reliably using the oil supply pump 2.
The first peripheral wall 1812 has an inner diameter that allows the suction pipe 4 of the oil supply pump 2 to be inserted and removed.
Note that the shape of the bottom 1810 is, for example, a circle, a triangle, a rectangle, or a polygon, and the shape of the first peripheral wall 1812 is appropriately determined according to the shape of the bottom 1810.

Next, the operation of extracting the fuel F from the vehicle fuel tank 10A using the fuel pump 2 will be described.
First, the cap 22 is removed from the fuel filler 20 and the fuel filler 20 is opened.
Next, the straight suction pipe 4 of the oil supply pump 2 is inserted from the oil supply port 20 toward the liquid reservoir 18.
If the suction pipe 4 reaches the liquid reservoir 18 and the tip 4A of the suction pipe 4 hits the bottom 1810 of the liquid reservoir 18, the pump unit 3 is manually operated in that state, The fuel F is sucked from the liquid reservoir 18 and is stored in an appropriate place from the discharge pipe 6.
As the fuel level of the fuel F in the vehicle fuel tank 10 </ b> A decreases due to the suction of the fuel F by the fuel pump 2 and the liquid level approaches the bottom surface portion 13, the fuel F flows from the bottom surface portion 13 to the liquid reservoir 18. I will do it.
Eventually, the fuel F remaining on the bottom surface portion 13 disappears, and the fuel F in the liquid reservoir portion 18 is sucked, whereby the fuel F in the vehicle fuel tank 10A is completely extracted.

According to the present embodiment, the bottom wall 12 of the vehicle fuel tank 10 </ b> A includes the bottom surface portion 13 and the liquid reservoir portion 18 that is recessed below the bottom surface portion 13. The straight suction pipe 4 of the oil supply pump 2 was inserted from 20 to suck the fuel.
Therefore, as in the prior art, a flexible rubber hose is inserted into the vehicle fuel tank 10A and the rubber hose is uniformly moved along the bottom wall 12, and the fuel F is sucked out or removed. An operation that requires a lot of labor such as temporarily removing the fuel pipe of the tank 10A and extracting the fuel F is not necessary, which is advantageous in easily and reliably extracting the fuel F in the vehicle fuel tank 10A.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG.
In the following embodiments, parts and members that are the same as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and parts different from those in the first embodiment are mainly described. .
As shown in FIG. 2, the second embodiment is that the fuel tank 20 </ b> B is located at a location where the fuel filler 20 and the liquid reservoir 18 are separated from each other when viewed from above. The form is different.
The fuel filler port 20 is disposed at a location near one side of the upper wall 16, and the central axis of the fuel filler port 20 is inclined with respect to the bottom surface portion 13.
The liquid reservoir 18 is formed so as to be recessed below the bottom surface 13, and is disposed at a location where the linear suction pipe 4 of the oil pump 2 inserted from the oil filler port 20 can reach the bottom 1810 of the liquid reservoir 18. ing.
The liquid reservoir portion 18 is formed by a circular bottom portion 1810 and a cylindrical first peripheral wall 1812 that stands up from the periphery of the bottom portion 1810. The first peripheral wall 1812 has an inner diameter that is the same as that of the suction pipe 4 of the oil supply pump 2. It is formed with dimensions that can be inserted and removed. Therefore, similarly to the first embodiment, the bottom surface portion 13 is formed so that the portion where the liquid reservoir portion 18 is provided is the deepest, and in this way, when fuel is reliably extracted using the fuel pump 2. It is intended to be advantageous.
In the present embodiment, the liquid reservoir 18 is provided so that the central axis of the cylindrical first peripheral wall 1812 coincides with the central axis of the fuel filler opening 20.

  Also in the second embodiment as described above, by inserting the linear suction pipe 4 of the fuel supply pump 2 from the fuel supply port 20 toward the liquid reservoir 18 and sucking the fuel F from the liquid reservoir 18, As in the first embodiment, the fuel F in the vehicle fuel tank 10B can be easily and reliably extracted.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG.
The third embodiment is a modification of the first embodiment, in which the liquid reservoir 18 of the vehicle fuel tank 10C is cylindrical in addition to the circular bottom 1810 and the cylindrical first peripheral wall 1812. The second embodiment is different from the first embodiment in that a second peripheral wall 1820 is provided.
As shown in FIG. 3, the second peripheral wall 1820 has a first peripheral wall 1812 or a bottom portion 1810 inside the first peripheral wall 1812 and spaced from the first peripheral wall 1812 via an attachment member (not shown). It is fixed to.
The second peripheral wall 1820 is formed so that fuel F can flow between the inside and the outside thereof, and the suction pipe 4 is inserted inside the second peripheral wall 1820.
Therefore, the second peripheral wall 1820 is located between the inner peripheral surface 1812A of the first peripheral wall 1812 and the outer peripheral surface 4B of the suction pipe 4 of the oil supply pump 2.
The second peripheral wall 1820 only needs to be formed of a member that allows the fuel F to flow between the inner side and the outer side, and various conventionally known members such as a wire mesh and punching metal are used as such a member. Is possible.

  According to the third embodiment, it is needless to say that the same effects as those of the first embodiment can be obtained, and the second peripheral wall 1820 is disposed between the first peripheral wall 1812 and the suction pipe 4. Therefore, when the fuel F is extracted, the second peripheral wall 1820 allows the fuel F to smoothly flow into the liquid reservoir 18. Therefore, the fuel F can be smoothly sucked by the fuel pump 2, which is advantageous for reliably extracting the fuel F from the vehicle fuel tank 10C.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG.
The fourth embodiment is a modification of the first embodiment, and differs from the first embodiment in that a connecting pipe 24 that guides the fuel F on the bottom surface portion 13 to the liquid reservoir portion 18 is provided. ing.
As shown in FIG. 4, the opening 26 is provided in the location of the bottom face part 13 of vehicle fuel tank 10D.
The connecting pipe 24 connects the liquid reservoir 18 and the opening 26, and more specifically, connects the lowermost portion of the first peripheral wall 1812 and the opening 26.
According to the fourth embodiment, it is needless to say that the same effects as those of the first embodiment can be obtained, and the fuel F on the bottom surface portion 13 is smoothly supplied to the liquid reservoir portion 18 via the connecting pipe 24. Flow into. Therefore, the fuel F can be smoothly sucked by the fuel pump 2, which is advantageous for reliably extracting the fuel F from the vehicle fuel tank 10C.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIG.
The fifth embodiment is different from the first embodiment in the shape of the bottom wall 12 of the vehicle fuel tank 10E.
As shown in FIG. 5, the bottom surface portion 13 extends flatly along the horizontal plane and is located at the deepest bottom wall portion 1302, and extends flatly along the horizontal plane and above the deepest bottom wall portion 1302. And a shallow bottom wall portion 1304 located at the bottom.
The liquid reservoir portion 18 is provided in the deepest bottom wall portion 1302, and therefore the bottom surface portion 13 is configured such that the portion where the liquid reservoir portion 18 is provided is deepest.

  According to the fifth embodiment, since the liquid reservoir portion 18 is provided in the deepest bottom wall portion 1302 positioned at the lowest position among the bottom surface portions 13, the bottom surface portion 13 has the deepest bottom wall portion 1302 and the deepest bottom wall portion 1302. In the case of having the shallow bottom wall portion 1304 positioned above the upper limit, it is advantageous for reliably extracting the fuel F.

(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIG.
The sixth embodiment is a modification of the first embodiment, and the shape of the liquid reservoir 18 is different from that of the first embodiment.
As shown in FIG. 6, an inclined surface 1812B is provided in the liquid reservoir 18 of the vehicle fuel tank 10F.
More specifically, an inclined surface 1812B is provided on the first peripheral wall 1812, and the inclined surface 1812B gradually breaks off the liquid pool portion 18 at a location near the bottom surface portion 13 of the first peripheral wall 1812 as the bottom surface portion 13 is approached. It is provided to increase the area.
According to the sixth embodiment, since the fuel F on the bottom surface portion 13 smoothly flows into the liquid reservoir portion 18 along the inclined surface 1812B, the fuel F in the vehicle fuel tank 10F is efficiently used by the fuel pump 2. It is advantageous for extracting well.
Further, since the inclined surface 1812B guides the tip 4A of the suction pipe 4 of the oil supply pump 2 to the bottom 1810 of the liquid reservoir 18, it is advantageous in facilitating the insertion work into the liquid reservoir 18 of the suction pipe 4. Become.

2 Oil supply pump 4 Suction pipe 4A Tip 4B Outer peripheral surface 10A, 10B, 10C, 10D, 10E, 10F Vehicle fuel tank 12 Bottom wall 13 Bottom portion 18 Liquid reservoir portion 1810 Bottom portion 1812 First peripheral wall 1812A Inner peripheral surface 1812B Inclined surface 1820 Second peripheral wall 20 Refueling port 24 Connecting pipe 26 Opening F Fuel

Claims (4)

A vehicle fuel tank having a fuel filler opening and a bottom wall,
The bottom wall is composed of a bottom surface portion and a liquid reservoir portion recessed below the bottom surface portion,
The liquid reservoir is arranged at a location where a linear suction pipe of an oil supply pump inserted from the oil supply port can reach the bottom of the liquid reservoir ,
An opening is provided in the bottom portion,
A connecting pipe that connects the liquid reservoir and the opening is provided,
A fuel tank for vehicles. The bottom portion is formed so that the location where the liquid reservoir is provided is deepest.
The vehicle fuel tank according to claim 1. The liquid reservoir portion is formed by the bottom portion positioned below the bottom surface portion, and a first peripheral wall that rises from the periphery of the bottom portion and connects to the bottom surface portion,
A second peripheral wall is provided inside the first peripheral wall at a distance from the first peripheral wall,
The second peripheral wall is formed to allow fuel to flow between the inside and the outside thereof,
The suction pipe is inserted inside the second peripheral wall;
The fuel tank for vehicles according to claim 1 or 2 characterized by things. The liquid reservoir is provided with an inclined surface that gradually increases the cross-sectional area of the liquid reservoir as it approaches the bottom surface.
The vehicle fuel tank according to any one of claims 1 to 3 , wherein the vehicle fuel tank is provided.

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