JP5235563B2 - Fuel tank filler - Google Patents
Fuel tank filler Download PDFInfo
- Publication number
- JP5235563B2 JP5235563B2 JP2008216382A JP2008216382A JP5235563B2 JP 5235563 B2 JP5235563 B2 JP 5235563B2 JP 2008216382 A JP2008216382 A JP 2008216382A JP 2008216382 A JP2008216382 A JP 2008216382A JP 5235563 B2 JP5235563 B2 JP 5235563B2
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- JP
- Japan
- Prior art keywords
- fuel
- fuel tank
- inner pipe
- tank
- filler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002828 fuel tank Substances 0.000 title claims description 61
- 239000000945 filler Substances 0.000 title claims description 37
- 239000000446 fuel Substances 0.000 claims description 67
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Description
本発明は、エンジン駆動作業機等の燃料タンクへ適用可能な、あるいは、その他一般的な燃料タンクへも適用可能な燃料タンク給油口に関するものである。 The present invention relates to a fuel tank filler port that can be applied to a fuel tank of an engine-driven work machine or the like, or can be applied to other general fuel tanks.
図２は、燃料タンク給油口の断面図である。図２において、１は燃料タンク、２は給油口筒部、３は、燃料タンク１に充填された燃料である。燃料３は、ポリタンク等から給油口筒部２を通して燃料タンク１内に注入されるが、その際、一度に大量の燃料３を、給油口筒部２へ注ぎ込むと、燃料タンク１内からの空気の抜け道が、注ぎ込んだ燃料により塞がれて、燃料をうまく注ぎ込めなくなる。 FIG. 2 is a cross-sectional view of the fuel tank filler opening. In FIG. 2 , 1 is a fuel tank, 2 is a fuel filler cylinder, and 3 is fuel filled in the fuel tank 1. The fuel 3 is injected from the poly tank or the like into the fuel tank 1 through the fuel filler cylinder 2. When a large amount of the fuel 3 is poured into the fuel filler cylinder 2 at that time, air from the fuel tank 1 is injected. The passage of the water is blocked by the injected fuel, and the fuel cannot be poured well.
そこで、例えば、特許文献１に示されるように、給油口筒部２を傾斜させて設け、その中間上部を外方に膨出させて通気通路を形成した燃料タンク給油口が提案されている。そのようにすれば、燃料の注入が円滑にできるようになる。
しかしながら、上記従来の燃料タンク給油口でも、燃料タンク１内に燃料３を満タンに充填すると、温度が上昇して燃料３が熱膨張したとき、給油口から燃料３が溢れ出してしまって、危険であったり、機械を汚したり、機外に漏れて環境を汚染したりするという問題点があった。そのような問題点を回避するため、予め燃料の熱膨張分を予測して給油口筒部２を長くしたり、太くしたりすることも考えられるが、そのようにするには、艤装上困難な場合が多い。 However, even in the conventional fuel tank refueling port, when the fuel 3 is fully filled in the fuel tank 1, when the temperature rises and the fuel 3 thermally expands, the fuel 3 overflows from the refueling port, There was a problem that it was dangerous, dirty the machine, and leaked outside the machine and contaminated the environment. In order to avoid such problems, it is conceivable that the thermal expansion portion of the fuel is predicted in advance and the fuel filler tube portion 2 is lengthened or thickened. There are many cases.
本発明は、そのような問題点に鑑み、燃料タンク内に燃料を最大限充填しても、燃料タンク内に燃料の熱膨張を吸収できるだけの空間が生じるようにして、給油口から燃料が溢れ出ることがないようにすることを目的とするものである。 In view of such a problem, the present invention allows a fuel to overflow from the fuel filler opening so that a space sufficient to absorb the thermal expansion of the fuel is created in the fuel tank even when the fuel tank is filled to the maximum extent. The purpose is to prevent it from coming out.
前記課題を解決するため、本願の請求項１にかかる発明は、給油口筒部を燃料タンクの上面に直立させて設け、該給油口筒部の内側に、給油口筒部より高さが低い内管を、燃料タンクの上面から燃料タンク内に下端開口部を突出させて設け、給油口筒部と内管の間の燃料タンク上面に、タンク壁を貫通させて通気孔を設けたことを特徴とする。 In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is such that the fuel filler tube portion is provided upright on the upper surface of the fuel tank, and the height inside the fuel filler tube portion is lower than that of the fuel filler tube portion. The inner pipe is provided with a lower end opening projecting from the upper surface of the fuel tank into the fuel tank, and a vent hole is provided through the tank wall on the upper surface of the fuel tank between the fuel filler cylinder and the inner pipe. Features.
また、本願の請求項２にかかる発明は、請求項１にかかる発明において、前記通気孔を、給油口筒部と内管の間の燃料タンク上面の対向位置に複数個設けたことを特徴とする。 The invention according to claim 2 of the present application is characterized in that, in the invention according to claim 1, a plurality of the vent holes are provided at opposing positions on the upper surface of the fuel tank between the fuel filler cylinder and the inner pipe. To do.
本発明の燃料タンク給油口は、次のような効果を奏する。
すなわち、請求項１にかかる発明においては、給油口筒部を燃料タンクの上面に直立させて設け、該給油口筒部の内側に、給油口筒部より高さが低い内管を、燃料タンクの上面から燃料タンク内に下端開口部を突出させて設け、給油口筒部と内管の間の燃料タンク上面に、タンク壁を貫通させて通気孔を設けた。その結果、燃料タンクへの過剰給油を防止するとともに、燃料タンク内に燃料を最大限充填しても、燃料タンク内に燃料の熱膨張を吸収できるだけの空間が生じるようになって、給油口から燃料が溢れ出ることがなくなる。さらに、給油時、内管が一杯になって擬似的に満タン状態になったとき、内管から燃料が溢れ出ることがあっても、溢れ出た燃料は、給油口筒部と内管の間の通気孔を通って、燃料タンク内に確実に回収される。
The fuel tank filler of the present invention has the following effects.
That is, in the invention according to claim 1, the fuel filler cylinder is provided upright on the upper surface of the fuel tank, and an inner pipe having a height lower than that of the fuel filler cylinder is provided inside the fuel filler cylinder. A lower end opening is provided in the fuel tank so as to protrude from the upper surface of the fuel tank, and a vent hole is provided through the tank wall on the upper surface of the fuel tank between the fuel filler cylinder and the inner pipe. As a result, excessive fuel supply to the fuel tank is prevented, and even when the fuel tank is filled to the maximum extent, a space that can absorb the thermal expansion of the fuel is created in the fuel tank. The fuel will not overflow. In addition, when fuel is filled, when the inner pipe becomes full and becomes pseudo-full, fuel overflows from the inner pipe and the inner pipe. It is reliably recovered in the fuel tank through the air vents between them.
また、請求項２にかかる発明においては、請求項１にかかる燃料タンク給油口において、前記通気孔を、給油口筒部と内管の間の燃料タンク上面の対向位置に複数個設けたので、上記効果に加えて、燃料タンクが多少傾いた状態で給油しても、擬似的に満タン状態になった後、いずれかの通気孔により確実に通気が維持されて、燃料タンク内の上部空間が封止されることがなくなり、燃料タンク内燃料の熱膨張を吸収できる。 Further, in the invention according to claim 2, in the fuel tank refueling port according to claim 1, a plurality of the vent holes are provided at opposing positions on the upper surface of the fuel tank between the fuel filler tube portion and the inner pipe. In addition to the above effects, even if the fuel tank is refilled with a slight inclination, the air is reliably maintained by any one of the vent holes after the tank is simulated to be full, and the upper space in the fuel tank is maintained. Is not sealed, and the thermal expansion of the fuel in the fuel tank can be absorbed.
以下、本発明の実施例を図面に基づいて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は、本発明の一実施例に係る燃料タンク給油口の断面図であり、図１（イ）は、燃料タンクに燃料を給油している状態を示し、図１（ロ）は、燃料の液面が内管下端開口部にまで達した状態を示し、図１（ハ）は、図１（ロ）の状態になった後、内管内の燃料が燃料タンク内に流下して収まった状態を示している。 Figure 1 is a sectional view of the fuel tanks fuel supply port according to an embodiment of the present invention, FIG. 1 (b) shows a state where the oil fuel into the fuel tank, Fig. 1 (b), the fuel 1 (c) shows the state where the liquid level of the inner pipe reaches the lower end opening of the inner pipe, and FIG. 1 (c) shows that the fuel in the inner pipe has flowed down into the fuel tank after the state shown in FIG. 1 (b). Indicates the state.
給油口筒部２を燃料タンク１の上面に直立させて設け、その給油口筒部２の内側に、給油口筒部２より高さが低い内管７を、燃料タンク１の上面から燃料タンク内に内管下端開口部８を突出させて設けている。そして、給油口筒部２と内管７の間の燃料タンク上面の対向位置に、通気孔５，５を２個設けている。このように、通気孔５を複数個設ければ、給油する際に燃料タンク１が多少傾斜して、液面の傾斜によりいずれかの通気孔が塞がれても、他の通気孔５により確実に通気が維持される。なお、これらの通気孔５，５の大きさも、例えば、給油口筒部２の口径が８５ｍｍのとき、直径２ｍｍ程度にすれば所期の効果が得られる。 The fuel filler cylinder portion 2 is provided upright on the upper surface of the fuel tank 1, and an inner pipe 7 having a height lower than that of the fuel filler cylinder portion 2 is provided inside the fuel filler cylinder portion 2 from the upper surface of the fuel tank 1. An inner pipe lower end opening 8 is provided so as to protrude inside. Two vent holes 5 and 5 are provided at the opposed positions on the upper surface of the fuel tank between the fuel filler cylinder portion 2 and the inner pipe 7. Thus, if a plurality of vent holes 5 are provided, the fuel tank 1 is slightly inclined when refueling, and even if one of the vent holes is blocked by the inclination of the liquid level, the other vent holes 5 Ventilation is reliably maintained. For example, when the diameter of the fuel filler tube portion 2 is 85 mm, the desired effect can be obtained when the size of the vent holes 5 and 5 is about 2 mm.
図１（イ）に示すように、給油口筒部２の上部開口部から内管７内を通して燃料タンク１に、注入燃料６を注入していくと、内管下端開口部８及び通気孔５，５を通して燃料タンク１内の空気を外部に押し出しながら、燃料タンク１内で燃料３の液面が徐々に上昇していく。 As shown in FIG. 1 (a), when injected fuel 6 is injected into the fuel tank 1 from the upper opening of the fuel filler cylinder 2 through the inner tube 7, the inner tube lower end opening 8 and the vent hole 5 are injected. , 5, the liquid level of the fuel 3 gradually rises in the fuel tank 1 while pushing out the air in the fuel tank 1 to the outside.
そして、図１（ロ）に示すように、液面が内管下端開口部８に達すると、内管下端開口部８が燃料３により閉塞され、燃料タンク１内の空気は、燃料３の液面と燃料タンク１の上面壁との間に閉じこめられる。その空気の一部は、通気孔５，５から給油口筒部２と内管７の間を通り抜けていくが、その量に比べて、給油量が多ければ、燃料３の液面は、内管７内を上がっていく。その後、内管７内が燃料３で一杯になったところで、燃料タンク１が満タンになったものとみなして、給油者は燃料の注入を停止する。 As shown in FIG. 1 (b), when the liquid level reaches the inner pipe lower end opening 8, the inner pipe lower end opening 8 is closed by the fuel 3, and the air in the fuel tank 1 It is confined between the surface and the top wall of the fuel tank 1. A part of the air passes through the air holes 5 and 5 between the fuel filler cylinder portion 2 and the inner pipe 7, but if the amount of fuel supplied is larger than that amount, the liquid level of the fuel 3 Go up in tube 7. After that, when the inside of the inner pipe 7 is filled with the fuel 3, it is considered that the fuel tank 1 is full, and the refueler stops the fuel injection.
その際、注入の停止が遅れて、内管７から燃料が溢れ出ることがあっても、溢れ出た燃料は、給油口筒部２と内管７の間の通気孔５，５を通って、燃料タンク１内に確実に回収される。 At that time, even if the stoppage of injection is delayed and the fuel overflows from the inner pipe 7, the overflowed fuel passes through the vent holes 5 and 5 between the fuel filler cylinder portion 2 and the inner pipe 7. The fuel tank 1 is reliably recovered.
そして、燃料の注入を停止した後は、燃料３の液面と燃料タンク１の上面壁との間にある空気が、通気孔５から給油口筒部２と内管７の間を通り抜けていき、最終的には、図１（ハ）に示すように、燃料３の液面は、内管下端開口部８より少し上の位置になって、燃料タンク１の上面壁の下側に空間が確保される。 After the fuel injection is stopped, the air between the liquid level of the fuel 3 and the upper wall of the fuel tank 1 passes through the vent hole 5 and between the fuel filler cylinder portion 2 and the inner pipe 7. Finally, as shown in FIG. 1 (c), the liquid level of the fuel 3 is slightly above the lower end opening 8 of the inner tube, and a space is formed below the upper surface wall of the fuel tank 1. Secured.
その状態で、温度上昇により燃料３が膨張しても、燃料タンク１の上面壁の下側の空間にある空気は通気孔５，５を通して出入り可能になっているため、その空間により燃料膨張による液面上昇を吸収することができ、内管７や給油口筒部２から燃料３が溢れ出ることはない。 In this state, even if the fuel 3 expands due to the temperature rise, the air in the space below the upper wall of the fuel tank 1 can enter and exit through the vent holes 5 and 5. The rise in the liquid level can be absorbed, and the fuel 3 does not overflow from the inner pipe 7 or the fuel filler cylinder portion 2.
１…燃料タンク
２…給油口筒部
３…燃料
５…通気孔
６…注入燃料
７…内管
８…内管下端開口部
DESCRIPTION OF SYMBOLS 1 ... Fuel tank 2 ... Refueling port cylinder part 3 ... Fuel 5 ... Vent hole 6 ... Injection fuel 7 ... Inner pipe 8 ... Inner pipe lower end opening part
Claims (2)
前記通気孔を、給油口筒部と内管の間の燃料タンク上面の対向位置に複数個設けたことを特徴とする請求項１に記載の燃料タンク給油口。
2. The fuel tank filler port according to claim 1 , wherein a plurality of the vent holes are provided at positions opposed to the upper surface of the fuel tank between the fuel filler cylinder and the inner pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008216382A JP5235563B2 (en) | 2008-08-26 | 2008-08-26 | Fuel tank filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008216382A JP5235563B2 (en) | 2008-08-26 | 2008-08-26 | Fuel tank filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010052448A JP2010052448A (en) | 2010-03-11 |
| JP5235563B2 true JP5235563B2 (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008216382A Active JP5235563B2 (en) | 2008-08-26 | 2008-08-26 | Fuel tank filler |
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| Country | Link |
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| JP (1) | JP5235563B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7045848B2 (en) * | 2017-12-21 | 2022-04-01 | カワサキモータース株式会社 | Fuel tank |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5087321U (en) * | 1973-12-14 | 1975-07-24 | ||
| JPS52110321A (en) * | 1976-03-13 | 1977-09-16 | Nissan Shatai Co | Fuel tank filler pipe mechanism |
| JP2006168502A (en) * | 2004-12-15 | 2006-06-29 | Hoei Kogyo Kk | Fuel tank filler neck structure, and manufacturing method of fuel tank filler neck structure |
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2008
- 2008-08-26 JP JP2008216382A patent/JP5235563B2/en active Active
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| Publication number | Publication date |
|---|---|
| JP2010052448A (en) | 2010-03-11 |
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