JPH07102302B2 - Automatic drainage system for fuel supply system - Google Patents
Automatic drainage system for fuel supply systemInfo
- Publication number
- JPH07102302B2 JPH07102302B2 JP62166093A JP16609387A JPH07102302B2 JP H07102302 B2 JPH07102302 B2 JP H07102302B2 JP 62166093 A JP62166093 A JP 62166093A JP 16609387 A JP16609387 A JP 16609387A JP H07102302 B2 JPH07102302 B2 JP H07102302B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- water
- fuel supply
- oil
- hydrophilic polymer
- 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.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000012528 membrane Substances 0.000 claims description 33
- 229920001477 hydrophilic polymer Polymers 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 19
- 230000014759 maintenance of location Effects 0.000 claims description 17
- 239000000020 Nitrocellulose Substances 0.000 claims description 4
- 229920001220 nitrocellulos Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 claims description 2
- 229940081735 acetylcellulose Drugs 0.000 claims description 2
- 229920002301 cellulose acetate Polymers 0.000 claims description 2
- 229920002492 poly(sulfone) Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、燃料供給装置の自動排水装置に関し、特にデ
ィーゼルエンジン用燃料の如く含水率の高い燃料中の水
分を選択的に除去できる自動排水装置に関する。Description: TECHNICAL FIELD The present invention relates to an automatic drainage device for a fuel supply device, and more particularly to an automatic drainage device capable of selectively removing water in a fuel having a high water content such as a diesel engine fuel. Regarding the device.
［従来の技術］ ディーゼルエンジン用燃料は、ガソリンに比べて含水率
が高く、そのまま燃料として使用すると、水分によるエ
ンジンの出力低下や燃料系機器の発錆を招くという問題
点がある。[Prior Art] Diesel engine fuel has a higher water content than gasoline, and if it is used as a fuel as it is, there is a problem that the output of the engine is reduced due to moisture and the fuel system equipment is rusted.
これを防止するため、実開昭59−126170号公報には、デ
ィーゼルエンジンの燃料供給配管途中に設けた燃料フィ
ルタに自動排水装置を設けたものが提案されている。こ
の排水装置は、燃料フィルタを通過する間に沈降分離し
た水が一定量溜まると水レベルセンサが作動し、弁が開
いてポンプで排水するものである。In order to prevent this, Japanese Utility Model Laid-Open No. 59-126170 proposes that a fuel filter provided in the fuel supply pipe of a diesel engine is provided with an automatic drainage device. In this drainage device, when a certain amount of water that has settled and separated while passing through the fuel filter accumulates, the water level sensor operates, the valve opens, and the water is drained by the pump.
しかしながら、かかる自動排水装置は、水レベルセン
サ、排水ポンプ、電磁弁、さらには制御回路等が必要
で、部品点数が多く、組付性およびコスト面で不利であ
る。また、排水時に燃料が混入して流出するおそれがあ
る。However, such an automatic drainage device requires a water level sensor, a drainage pump, a solenoid valve, a control circuit, and the like, has a large number of parts, and is disadvantageous in terms of assembly and cost. In addition, fuel may mix and flow out during drainage.
そこで、特開昭61−216701号公報では、燃料フィルタの
底壁を親水性高分子の多孔質膜よりなる油水分離膜で構
成して、フィルタ内で燃料から分離、沈降した水を上記
油水分離膜で選択的に排出するものが提案されており、
これによれば、極めて簡単かつ底コストの自動排水装置
が実現できる。Therefore, in JP-A-61-216701, the bottom wall of the fuel filter is composed of an oil-water separation membrane made of a porous membrane of hydrophilic polymer, and the water separated and settled from the fuel in the filter is separated into the oil-water separation membrane. It has been proposed to selectively discharge with a membrane,
According to this, an extremely simple and bottom-cost automatic drainage device can be realized.
［発明が解決しようとする問題点］ ところで、上記油水分離膜が良好に機能するには、常に
充分な水分を含んでいることが必要であり、多孔質膜の
膜面上に吸着した水分子および多孔質膜を構成する高分
子間に水素結合による架橋を生ずることにより燃料が通
孔を通過するのを防止している。したがって、比較的含
水率の低い燃料に装置を使用する場合には油水分離膜が
乾燥しないように注意を払う必要がある。[Problems to be Solved by the Invention] In order for the oil-water separation membrane to function well, it is necessary that the oil-water separation membrane always contains sufficient water, and water molecules adsorbed on the surface of the porous membrane. Also, the fuel is prevented from passing through the pores by causing cross-linking due to hydrogen bond between the polymers constituting the porous membrane. Therefore, when using the device for a fuel having a relatively low water content, it is necessary to take care not to dry the oil-water separation membrane.
本発明はかかる実情に鑑みてなされたもので、乾燥状態
でも油漏れを生じず、したがって、含水率の低い燃料に
も好適に使用できる燃料供給装置の自動排水装置を提供
することを目的とする、 ［問題点を解決するための手段］ 本発明の構成を図で説明すると、燃料供給装置の燃料供
給路中に燃料滞留室Ａ（第１図）が設けてあり、該燃料
滞留室Ａの底部は排水口Ｂに接続せしめてある。上記燃
料滞留室Ａの底壁は、親水性高分子多孔質膜71（第２
図）上に水分散性の親水性高分子被膜72を形成してなる
油水分離膜７で構成してある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic drainage device of a fuel supply device that does not cause oil leakage even in a dry state and can be suitably used for fuel having a low water content. [Means for Solving the Problems] The structure of the present invention will be described with reference to the drawings. A fuel retention chamber A (FIG. 1) is provided in the fuel supply passage of the fuel supply device. The bottom is connected to the drainage port B. The bottom wall of the fuel retention chamber A has a hydrophilic polymer porous membrane 71 (second
(Fig.) A water-dispersible hydrophilic polymer film 72 is formed on the oil-water separation film 7.
［作用］ 上記燃料滞留室Ａにおいて、燃料中の水分は、燃料との
比重差によって沈降し、上記油水分離膜７上に達する。
上記油水分離膜７上層は親水性高分子被膜72であるから
水が接触すると上記被膜72を構成する親水性高分子は水
中に分散し、下層の親水性高分子多孔質膜71の通孔711
が解放される。しかして、水分は上記通孔711を通過し
て排出される。[Operation] In the fuel retention chamber A, the water in the fuel settles due to the difference in specific gravity from the fuel and reaches the oil-water separation membrane 7.
Since the upper layer of the oil-water separation membrane 7 is the hydrophilic polymer coating 72, the hydrophilic polymer constituting the coating 72 is dispersed in water when water comes into contact therewith, and the pores 711 of the lower hydrophilic polymer porous membrane 71 are formed.
Is released. Then, the moisture passes through the through hole 711 and is discharged.
水分が全て排出されると、分散した上記親水性高分子は
再び集積して被膜72を形成し、多孔質膜71の通孔711を
閉鎖する。この状態で上記多孔質膜71が乾燥しても、上
記被膜72により通孔711が閉鎖されているから燃料の漏
れは生じない。When all the water is discharged, the dispersed hydrophilic polymer again accumulates to form the coating film 72 and closes the through hole 711 of the porous film 71. Even if the porous film 71 is dried in this state, fuel leakage does not occur because the through hole 711 is closed by the film 72.
［発明の効果］ 上記構成によれば、油水分離膜を、親水性高分子多孔質
膜上に親水性高分子の被膜を積層形成して二層構造とし
たから、上記多孔質膜が乾燥しても燃料が漏れるおそれ
はなく、特に含水率の比較的低い燃料の排水装置として
好適に使用できる。[Advantages of the Invention] According to the above configuration, since the oil-water separation membrane has a two-layer structure in which a hydrophilic polymer coating is laminated on a hydrophilic polymer porous membrane, the porous membrane is dried. However, there is no risk of fuel leakage, and it can be suitably used as a drainage device for fuel having a relatively low water content.
［実施例］ 以下、本発明の一実施例を図面に基いて説明する。第１
図は燃料供給装置の燃料配管途中に設けた燃料フィルタ
Ｆの全体断面図である。図において、１は円筒状のフィ
ルタケースで、上方より蓋体２が覆着され、該蓋体２は
下端部を固定金具３により上記フィルタケース１に固定
してある。上記フィルタケース１の下端開口にはろうと
状の下部ケース４が上端部でフランジ接続してある。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. First
The figure is an overall cross-sectional view of the fuel filter F provided in the fuel pipe of the fuel supply device. In the figure, reference numeral 1 denotes a cylindrical filter case, which is covered with a lid 2 from above, and the lower end of the lid 2 is fixed to the filter case 1 by a fixing member 3. A funnel-shaped lower case 4 is flange-connected at the upper end to the lower end opening of the filter case 1.
上記フィルタケース１の内部には、支持用内筒６に支持
せしめて円筒形の除塵用過エレメント５が配設され、
該過エレメント５の下方空間は燃料滞留室Ａとしてあ
る。そして、上記燃料滞留室Ａと上記下部ケース４内の
排水室Ｂとを、外周縁を上記フランジ接続部に挟着せし
めた油水分離膜７で区画してある。Inside the filter case 1, a cylindrical dust removing excess element 5 supported by an inner supporting tube 6 is provided.
The space below the excess element 5 is a fuel retention chamber A. Then, the fuel retention chamber A and the drainage chamber B in the lower case 4 are partitioned by an oil / water separation membrane 7 whose outer peripheral edge is sandwiched between the flange connection portions.
上記油水分離膜７は、親水性高分子多孔質膜71の上層
に、水分散性の親水性高分子被膜72を形成してなる（第
２図）。上記多孔質膜71としては、アセチルセルロー
ス、ニトロセルロース、ポリサルフォン、ポリアミド、
ポリアクリロニトリル、またはポリビニルアルコール系
高分子等の親水性高分子よりなる多孔質膜が使用でき、
上記被膜72としては、ポリビニルアルコール、ニトロセ
ルロース等の親水性高分子よりなる被膜が使用できる。The oil-water separation membrane 7 is formed by forming a water-dispersible hydrophilic polymer coating 72 on the hydrophilic polymer porous membrane 71 (FIG. 2). As the porous film 71, acetyl cellulose, nitrocellulose, polysulfone, polyamide,
A porous membrane made of a hydrophilic polymer such as polyacrylonitrile or polyvinyl alcohol-based polymer can be used,
As the coating 72, a coating made of a hydrophilic polymer such as polyvinyl alcohol or nitrocellulose can be used.
なお、親水性高分子被膜72を形成する高分子は、分子径
を多孔質膜71の孔径（約0.1μ程度）より大きくして、
多孔質膜71を通過することがないようにしてある。The polymer forming the hydrophilic polymer coating 72 has a molecular diameter larger than the pore diameter of the porous film 71 (about 0.1 μ),
It does not pass through the porous membrane 71.
上記蓋体２内には燃料流路が設けられ、燃料導入口21よ
り導入された燃料は、図中矢印の如く、過エレメント
５より燃料滞留室Ａを経て燃料導出管22に至り送出され
る。A fuel flow path is provided in the lid body 2, and the fuel introduced from the fuel introduction port 21 is delivered from the excess element 5 through the fuel retention chamber A to the fuel outlet pipe 22 as indicated by an arrow in the figure. .
上記燃料導入口21は図略の燃料タンクに通じ、燃料導出
口22は図略の燃料噴射弁に至っている。また、上記蓋体
２の頂面には燃料フィルタＦ内に燃料を導入するための
公知のハンドポンプ９が取付けてある。The fuel inlet 21 communicates with a fuel tank (not shown), and the fuel outlet 22 leads to a fuel injection valve (not shown). A known hand pump 9 for introducing fuel into the fuel filter F is attached to the top surface of the lid 2.
なお、上記下部ケース４には排水ホース８が接続してあ
る。上記排水ホース８内を負圧雰囲気とすることによ
り、排水効率が向上する。A drain hose 8 is connected to the lower case 4. By setting a negative pressure atmosphere in the drain hose 8, drainage efficiency is improved.
上記構成において、燃料タンクより上記燃料導入口21を
経て導入された燃料は、過エレメント５を通過する間
に除塵され、燃料滞留室Ａより、内筒６内を経て燃料導
出口22より燃料噴射弁に送られる。In the above structure, the fuel introduced from the fuel tank through the fuel introduction port 21 is dedusted while passing through the excess element 5, and is injected from the fuel retention chamber A through the inner cylinder 6 and the fuel ejection port 22. Sent to the valve.
ここにおいて、上記燃料滞留室Ａの底壁を構成する上記
油水分離膜７が燃料層ａと接している場合には、第２図
に示す如く、親水性高分子多孔質膜71の通孔711は親水
性高分子被膜72により閉鎖されており、燃料の通過は上
記多孔質膜71が乾燥している場合にも確実に遮断される
（第２図）。Here, when the oil / water separation membrane 7 constituting the bottom wall of the fuel retention chamber A is in contact with the fuel layer a, as shown in FIG. 2, the through hole 711 of the hydrophilic polymer porous membrane 71 is formed. Is closed by the hydrophilic polymer film 72, and the passage of fuel is surely blocked even when the porous film 71 is dry (FIG. 2).
燃料中に含有される水分は過エレメント５を通過する
間に凝集し、燃料との比重差によって上記滞留室Ａ内を
沈降して上記油水分離膜７上に集まる。The water contained in the fuel agglomerates while passing through the excess element 5, settles in the retention chamber A due to the difference in specific gravity from the fuel, and collects on the oil / water separation membrane 7.
油水分離膜７上層の被膜72は親水性高分子よりなるか
ら、水が接触するとこれを選択的に吸収し、上記被膜72
を形成する高分子ｂが水中に分散する（第３図）。かく
して、油水分離膜の下層を構成する多孔質膜71の通孔71
1が開放され、沈降分離した水ｃは上記通孔711を通過し
て排水室Ｂに至り、排出される。Since the coating 72 on the upper layer of the oil / water separation membrane 7 is made of a hydrophilic polymer, it is selectively absorbed when water comes in contact therewith, and the coating 72
The polymer b forming the is dispersed in water (Fig. 3). Thus, the through holes 71 of the porous membrane 71 forming the lower layer of the oil-water separation membrane
1 is opened, and the water c that has separated by sedimentation passes through the through hole 711, reaches the drainage chamber B, and is discharged.
水分が全て排出されると再び上記高分子が集積し、被膜
72を形成して通孔711を閉鎖する。When all the water is exhausted, the above polymer accumulates again and the film
72 is formed and the through hole 711 is closed.
かかる構成によれば、多孔質膜に常に水分を含有せしめ
ておく必要がなく、したがって、水分含有量の少ない燃
料に使用した場合においても、燃料の漏れが生じること
はなく、良好な排水機能を発揮する。With such a configuration, it is not necessary to always contain water in the porous membrane, and therefore, even when used for a fuel having a low water content, fuel leakage does not occur and a good drainage function is provided. Demonstrate.
本実施例では、燃料滞留室を燃料フィルタ内に設けた
が、燃料タンク内に設けてもよく、あるいは、燃料配管
内等に燃料の滞留部を設けて燃料滞留室とすることもで
きる。In this embodiment, the fuel retention chamber is provided in the fuel filter, but it may be provided in the fuel tank, or a fuel retention portion may be provided in the fuel pipe or the like to serve as the fuel retention chamber.
第１図〜第３図は本発明の一実施例を示し、第１図は自
動排水装置を設けた燃料フィルタの全体断面図、第２図
および第３図は油水分離膜の構成模式図である。 Ｆ……燃料フィルタ Ａ……燃料滞留室 Ｂ……排水室（排水口） ５……過エレメント ７……油水分離膜 71……親水性高分子多孔質膜 72……親水性高分子被膜1 to 3 show an embodiment of the present invention. FIG. 1 is an overall sectional view of a fuel filter provided with an automatic drainage device, and FIGS. 2 and 3 are schematic configuration diagrams of an oil / water separation membrane. is there. F ... Fuel filter A ... Fuel retention chamber B ... Drainage chamber (drainage port) 5 ... Excess element 7 ... Oil water separation membrane 71 ... Hydrophilic polymer porous membrane 72 ... Hydrophilic polymer coating
Claims (3)
を設けてその底部を排水口に接続せしめ、該燃料滞留室
の底壁を、親水性高分子多孔質膜上に水分散性の親水性
高分子被膜を形成してなる油水分離膜で構成したことを
特徴とする燃料供給装置の自動排水装置。1. A fuel retention chamber is provided in a fuel supply passage of a fuel supply device, and a bottom portion of the fuel retention chamber is connected to a drain port. The bottom wall of the fuel retention chamber is water-dispersible on a hydrophilic polymer porous membrane. An automatic drainage device for a fuel supply device, comprising an oil / water separation film formed by forming the hydrophilic polymer film of 1.
を配設した燃料フィルタ内に設けた特許請求の範囲第１
項記載の燃料供給装置の自動排水装置。2. The fuel retention chamber is provided in a fuel filter having an excess element therein.
An automatic drainage device for the fuel supply device according to the item.
ニトロセルロース、ポリサルフォン、ポリアミド、ポリ
アクリロニトリル、またはポリビニルアルコール系高分
子よりなる多孔質膜の上層にポリビニルアルコール、ま
たはニトロセルロースよりなる被膜を形成せしめて構成
した特許請求の範囲第１項記載の燃料供給装置の自動排
水装置。3. The oil-water separation membrane, acetyl cellulose,
2. The fuel supply according to claim 1, wherein the porous film made of nitrocellulose, polysulfone, polyamide, polyacrylonitrile, or polyvinyl alcohol polymer is formed on the upper layer with a film made of polyvinyl alcohol or nitrocellulose. Automatic drainage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166093A JPH07102302B2 (en) | 1987-07-02 | 1987-07-02 | Automatic drainage system for fuel supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166093A JPH07102302B2 (en) | 1987-07-02 | 1987-07-02 | Automatic drainage system for fuel supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6411608A JPS6411608A (en) | 1989-01-17 |
| JPH07102302B2 true JPH07102302B2 (en) | 1995-11-08 |
Family
ID=15824868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62166093A Expired - Fee Related JPH07102302B2 (en) | 1987-07-02 | 1987-07-02 | Automatic drainage system for fuel supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07102302B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100505926B1 (en) * | 2002-01-30 | 2005-08-03 | 이태규 | Sheet manufacturing method for air filter of water-soluble |
| JP5019028B2 (en) * | 2006-12-04 | 2012-09-05 | 株式会社デンソー | Fuel supply device for internal combustion engine |
-
1987
- 1987-07-02 JP JP62166093A patent/JPH07102302B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6411608A (en) | 1989-01-17 |
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| LAPS | Cancellation because of no payment of annual fees |