JPH01269766A - Breather device for fuel tank - Google Patents
Breather device for fuel tankInfo
- Publication number
- JPH01269766A JPH01269766A JP9782088A JP9782088A JPH01269766A JP H01269766 A JPH01269766 A JP H01269766A JP 9782088 A JP9782088 A JP 9782088A JP 9782088 A JP9782088 A JP 9782088A JP H01269766 A JPH01269766 A JP H01269766A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- tank
- fuel tank
- pipe
- breather device
- 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.)
- Pending
Links
- 239000002828 fuel tank Substances 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 abstract description 8
- 239000004744 fabric Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 2
- 229920002635 polyurethane Polymers 0.000 abstract description 2
- 239000004814 polyurethane Substances 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 3
- 238000010030 laminating Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 8
- 239000012982 microporous membrane Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 2
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
Description
【発明の詳細な説明】
ａ、 産業上の利用分野
本発明は、燃料タンクのブリーザ装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a breather device for a fuel tank.
ｂ、 従来の技術
燃料タンクでは、燃料注入時の噴返しを防いだり、燃料
蒸気の膨張による内圧で燃料タンクが変形しないように
燃料タンクの天井部をパイプを介して燃料タンク外に開
放させている。b. Conventional technology In fuel tanks, the ceiling of the fuel tank is opened to the outside of the fuel tank via a pipe in order to prevent the fuel from blowing back when fuel is injected, and to prevent the fuel tank from being deformed by the internal pressure caused by the expansion of fuel vapor. There is.
第４図および第５図は従来から採用されているブリーザ
装置を示したものである。FIGS. 4 and 5 show a conventional breather device.
第４図のブリーザ装置は、車両が転倒した際に、燃料が
タンク１外へ流出しないようにボール式チエツクバルブ
２をパイプ３内に配設している。このボール式チエツク
バルブ２は燃料より比重の大きいボール２ａを、燃料蒸
気の流通を妨げないように配設した受皿２ｂ内に載置さ
せるとともに、該受皿２ｂの上方に位置するパイプ内周
面に弁座２ｃを形成したものである。したがって、この
燃料タンク１の通常の状態では、タンク１内はタンク１
外と連通され、燃料蒸気は第４図（ａｌに矢示したよう
に、タンクｌ外へ排出され、車両が転倒した際には、第
４図（ｂｌに示したようにボール２ａがパイプ３の弁座
２ａに着座してパイプ３を閉塞し、燃料のタンク１外へ
の流出を防止する。In the breather device shown in FIG. 4, a ball-type check valve 2 is disposed within a pipe 3 to prevent fuel from flowing out of the tank 1 when the vehicle falls. This ball type check valve 2 has a ball 2a, which has a higher specific gravity than the fuel, placed in a tray 2b arranged so as not to obstruct the flow of fuel vapor, and a ball 2a placed on the inner peripheral surface of the pipe located above the tray 2b. A valve seat 2c is formed therein. Therefore, in the normal state of this fuel tank 1, the inside of the tank 1 is
The fuel vapor is discharged to the outside of the tank l as shown by the arrow in Fig. 4 (al), and when the vehicle falls over, the ball 2a is connected to the pipe 3 as shown in Fig. 4 (bl). The valve seat 2a is seated on the valve seat 2a to block the pipe 3 and prevent fuel from flowing out of the tank 1.
第５図のブリーザ装置は、例えば走行中の車両の姿勢変
化、振動等によって、燃料タンク５内の燃料が装置付近
に充満した際に、燃料がタンク５外へ流出しないように
、フロート式チエツクバルブ６をタンク５とパイプ７と
の間に介在させている、このフロート式チエツクバルブ
６は、天井壁にパイプ７に連通する孔８ａ、側壁にタン
ク１の上部に連通する孔８ｂと底壁にタンクｌの内方に
連通ずる孔８ｃをそれぞれ有し、さらに孔８ａの周囲に
弁座８ｄを形成したハウジング８と、該ハウジング８の
室８ｅ内に収容されたフロート９とから構成されている
。したがって、燃料が第５図（ａｌに示したように、タ
ンク５内に充満されていない状態においては、フロート
９がハウジング８の室８ｅの下方に位置され、タンク５
の上部は孔８ｂ、 ８ｂ、パイプ７を介してタンク５外
に連通され、燃料蒸気は矢示したようにタンク５外へ排
出され、燃料が第５図（ｂｌに示したように、タンク５
内に充満された状態においては、フロート９が弁座８ｄ
に当接して孔８ａを閉塞し、燃料のタンク５外への流出
を防止する。The breather device shown in FIG. 5 is a float-type check that prevents the fuel from flowing out of the tank 5 when the area near the device is filled with fuel in the fuel tank 5 due to, for example, changes in the posture of the vehicle while it is running, vibrations, etc. This float type check valve 6, which has a valve 6 interposed between the tank 5 and the pipe 7, has a hole 8a in the ceiling wall that communicates with the pipe 7, a hole 8b in the side wall that communicates with the top of the tank 1, and a bottom wall. The housing 8 has a hole 8c communicating with the inside of the tank l, and a valve seat 8d is formed around the hole 8a, and a float 9 accommodated in a chamber 8e of the housing 8. There is. Therefore, when the tank 5 is not filled with fuel as shown in FIG. 5(al), the float 9 is positioned below the chamber 8e of the housing 8,
The upper part of the tank 5 is communicated with the outside of the tank 5 through the holes 8b, 8b and the pipe 7, and the fuel vapor is discharged outside the tank 5 as shown by the arrow.
When the valve seat 8d is filled with water, the float 9 touches the valve seat 8d.
The hole 8a is closed by contacting the hole 8a to prevent the fuel from flowing out of the tank 5.
Ｃ１発明が解決しようとする課題
ところで、第４図に示したブリーザ装置では、第４図（
ａｌに示したチエツクバルブ２の王立状態に対して、チ
エツクパルプ２が第４図中）で示した１８０度程程度反
転した場合に、タンク１内の燃料の流出が確実に防止さ
れるものの、チエツクパルプ２が９０度程度に傾倒した
場合には、ボール２ａが弁座２ｃに確実に着座するとは
限らず、燃料の流出を招来する虞れがある。C1 Problems to be Solved by the Invention By the way, the breather device shown in FIG.
Although the outflow of fuel in the tank 1 is reliably prevented when the check valve 2 is reversed by about 180 degrees as shown in FIG. If the check pulp 2 is tilted at an angle of about 90 degrees, the ball 2a may not be securely seated on the valve seat 2c, which may cause fuel to flow out.
また、第５図に示したブリーザ装置では、走行中の車両
の振動に対しては、フロート９が応動できない場合があ
り、タンク１内の燃料の流出を確実に防止することはで
きない。Further, in the breather device shown in FIG. 5, the float 9 may not be able to respond to vibrations of a running vehicle, and it is not possible to reliably prevent the fuel in the tank 1 from flowing out.
そこで本発明の目的は、車両の転倒、振動等に際して燃
料のタンク外への流出を確実に防止でき、しかも構造が
極めて簡単な燃料タンクのブリーザ装置を提供すること
にある。SUMMARY OF THE INVENTION An object of the present invention is to provide a breather device for a fuel tank that can reliably prevent fuel from flowing out of the tank when the vehicle falls over, vibrates, etc., and that has an extremely simple structure.
ｄ、 課題を解決するための手段
本発明の燃料タンクのブリーザ装置では、燃料タンクに
、該燃料タンクの内部と外部とを連通ずるパイプを配設
するとともに、それらの内外部を遮断するように該パイ
プ内に燃料蒸気の径より大きく、油滴の径よりは小さな
径の通孔をもった微多孔皮膜を介在させている。d. Means for Solving the Problems In the fuel tank breather device of the present invention, a pipe is provided in the fuel tank to communicate between the inside and outside of the fuel tank, and a pipe is installed to shut off the inside and outside of the fuel tank. A microporous coating having through holes with a diameter larger than the diameter of the fuel vapor and smaller than the diameter of the oil droplets is interposed within the pipe.
ｅ、 作用
微多孔皮膜は、燃料蒸気の通過を許容するが、燃料の通
過を阻止する。したがって、通常状態において、燃料タ
ンクの内圧が高くなると、燃料蒸気を含む気体は微多孔
皮膜を通ってタンク外へ排出され、また燃料タンクの内
圧が低くなると、微多孔皮膜を介して大気が導入され、
タンク内は常に大気圧に保たれる。また、車両の転倒、
振動に際し、燃料がパイプまで達しても、燃料は微多孔
皮膜によって、その流出が阻止される。e. The working microporous coating allows the passage of fuel vapor but prevents the passage of fuel. Therefore, under normal conditions, when the internal pressure of the fuel tank increases, gases including fuel vapor are discharged to the outside of the tank through the microporous membrane, and when the internal pressure of the fuel tank decreases, the atmosphere is introduced through the microporous membrane. is,
The inside of the tank is always maintained at atmospheric pressure. In addition, vehicle overturning,
Even if fuel reaches the pipe during vibration, the microporous membrane prevents the fuel from flowing out.
ｆ、 実施例
第１図は本発明に係る燃料タンクのブリーザ装置を示し
、第２図はその装置の主要部材である濾過部材を示し、
第３図はその濾過部材における微多孔皮膜の作用を示し
ている。f. Embodiment FIG. 1 shows a fuel tank breather device according to the present invention, and FIG. 2 shows a filtration member which is a main component of the device.
FIG. 3 shows the action of the microporous membrane in the filter member.
このブリーザ装置では、燃料タンク１１の天井壁１１ａ
にパイプ１２が設置されている。このパイプ１２は、
下部パイプ１２ａ と上部パイプ１２ｂ とから構成さ
れており、パイプ１２ａ、 １２ｂ間に濾過部材１３が
挟持されている。この濾過部材１３では、布地等の基材
１３ａにポリテトラフルオルエチレン等の微多孔高分子
フィルムをラミネートしたり、布等の基材１３ａ にポ
リウレタンをコーティングして、基材１３ａ上に直径が
０．５〜３μｍ程度の孔を多数有する微多孔皮膜１３ｂ
を形成している。In this breather device, the ceiling wall 11a of the fuel tank 11
A pipe 12 is installed at. This pipe 12 is
It is composed of a lower pipe 12a and an upper pipe 12b, and a filter member 13 is sandwiched between the pipes 12a and 12b. In this filtration member 13, a microporous polymer film such as polytetrafluoroethylene is laminated on a base material 13a such as cloth, or a polyurethane is coated on the base material 13a such as cloth, and a diameter is Microporous film 13b having many pores of about 0.5 to 3 μm
is formed.
したがって、燃料タンク１１の内圧が高くなると、燃料
蒸気（直径０．０００４μｍぐらい）を含む気体Ａは濾
過部材１３の微多孔皮膜１３ｂを通ってタンク１１外へ
排出され、また燃料タンク１１の内圧が低くなると、微
多孔皮膜１３ｂを通って大気がタンク１１内に導入され
、タンク１１は常に大気圧に保たれる。Therefore, when the internal pressure of the fuel tank 11 increases, the gas A containing fuel vapor (about 0.0004 μm in diameter) passes through the microporous membrane 13b of the filter member 13 and is discharged to the outside of the tank 11, and the internal pressure of the fuel tank 11 increases. When the pressure becomes low, the atmosphere is introduced into the tank 11 through the microporous film 13b, and the tank 11 is always maintained at atmospheric pressure.
また、車両が振動し、燃料Ｂが濾過部材１３に達しても
、第３図に示したように燃料Ｂの油滴（直径１００〜３
０００μｍ）は、微多孔皮膜１３ｂによって通過が阻止
される。したがって、燃料Ｂがタンク１１外へ流出する
ことはない。勿論、車両が転倒しても、振動の場合と同
様に燃料Ｂのタンク外への流出は微多孔皮膜１３ｂによ
って防止される。Furthermore, even if the vehicle vibrates and the fuel B reaches the filter member 13, oil droplets of the fuel B (100 to 30 mm in diameter) as shown in FIG.
000 μm) is prevented from passing through by the microporous film 13b. Therefore, fuel B will not flow out of the tank 11. Of course, even if the vehicle falls over, the microporous film 13b prevents the fuel B from flowing out of the tank, as in the case of vibration.
なお、上記実施例では、濾過部材１３としてゴアテック
ス、エンドラント（いずれも商標）として知られている
服地を利用しているが、本発明の濾退部材では、燃料蒸
気を通過させる油滴は通過させない程度の孔を多数有す
るものであればよく、服地としての他の特長を備える必
要はない。したがって、濾過部材１３の基材１３ａ と
しては布以外のものでもよく、剛性を有する材料であれ
ばなおよい。また、微多孔皮膜１３ｂ も微多孔高分子
によって成形されるものに限定されない。In the above embodiment, the filtration member 13 uses cloths known as Gore-Tex and Endlant (both trademarks); however, in the filtration member of the present invention, the oil droplets that allow fuel vapor to pass through are It only needs to have a large number of holes that do not allow the material to pass through, and there is no need for it to have other features as a clothing material. Therefore, the base material 13a of the filtration member 13 may be made of something other than cloth, and even better if it has rigidity. Furthermore, the microporous coating 13b is not limited to one formed of microporous polymer.
ｇ、 発明の効果
上記したように、本発明に係る燃料タンクのブリーザ装
置は、車両の振動に際しては勿論のこと車両の転倒に際
しても、燃料タンク外への燃料の流出を確実に防止し、
しかも構造が極めて簡単である。g. Effects of the Invention As described above, the fuel tank breather device according to the present invention reliably prevents fuel from flowing out of the fuel tank, not only when the vehicle vibrates, but also when the vehicle overturns.
Furthermore, the structure is extremely simple.
第１図は本発明にかかる燃料タンクのブリーザ装置を示
した概念的な断面図、第２図はその装置で使用される濾
過部材の斜視図、第３図はその濾過部材における微多孔
皮膜による作用を示した図、第４図および第５図は従来
の燃料タンクのブリーザ装置とその装置の作用とをそれ
ぞれ示した概念的な断面図である。
１１・・・燃料タンク、 １２・・・パイプ、１３
・・・濾過部材、 １３ａ・・・基材、１３ｂ・
・・微多孔皮膜、 Ａ・・・気体、Ｂ・・・油滴。
特許出願人 鈴木自動車工業株式会社（ほか２名）
第１図
１３′Ｏ
第４図
（ａ）（ｂ）
第５図
（ａ） （ｂ）Fig. 1 is a conceptual cross-sectional view showing a fuel tank breather device according to the present invention, Fig. 2 is a perspective view of a filtration member used in the device, and Fig. 3 is a microporous film in the filtration member. 4 and 5 are conceptual cross-sectional views showing a conventional fuel tank breather device and the function of the device, respectively. 11...Fuel tank, 12...Pipe, 13
...Filtering member, 13a...Base material, 13b.
...Microporous film, A...Gas, B...Oil droplets. Patent applicant Suzuki Motor Co., Ltd. (and 2 others) Figure 1 13'O Figure 4 (a) (b) Figure 5 (a) (b)
Claims (1)
パイプを配設するとともに、それらの内外部を遮断する
ように該パイプ内に燃料蒸気の径より大きく油滴の径よ
りは小さな径の通孔をもった微多孔皮膜を介在させたこ
とを特徴とする燃料タンクのブリーザ装置。A fuel tank is provided with a pipe that communicates between the inside and outside of the fuel tank, and a pipe with a diameter larger than the diameter of the fuel vapor and smaller than the diameter of the oil droplets is installed in the pipe so as to block the inside and outside of the fuel tank. A breather device for a fuel tank characterized by interposing a microporous film having through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9782088A JPH01269766A (en) | 1988-04-20 | 1988-04-20 | Breather device for fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9782088A JPH01269766A (en) | 1988-04-20 | 1988-04-20 | Breather device for fuel tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01269766A true JPH01269766A (en) | 1989-10-27 |
Family
ID=14202375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9782088A Pending JPH01269766A (en) | 1988-04-20 | 1988-04-20 | Breather device for fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01269766A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100832A1 (en) * | 2004-04-12 | 2005-10-27 | Gore Entreprise Holdings, Inc. | Metal vent |
| EP3236722A1 (en) | 2016-04-18 | 2017-10-25 | W.L. Gore & Associates GmbH | Vent |
-
1988
- 1988-04-20 JP JP9782088A patent/JPH01269766A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100832A1 (en) * | 2004-04-12 | 2005-10-27 | Gore Entreprise Holdings, Inc. | Metal vent |
| US7357709B2 (en) | 2004-04-12 | 2008-04-15 | Gore Enterprise Holdings | Metal vent |
| EP3236722A1 (en) | 2016-04-18 | 2017-10-25 | W.L. Gore & Associates GmbH | Vent |
| WO2017182290A1 (en) | 2016-04-18 | 2017-10-26 | W.L. Gore & Associates Gmbh | Vent |
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