JPH0529932Y2 - - Google Patents
Info
- Publication number
- JPH0529932Y2 JPH0529932Y2 JP19201487U JP19201487U JPH0529932Y2 JP H0529932 Y2 JPH0529932 Y2 JP H0529932Y2 JP 19201487 U JP19201487 U JP 19201487U JP 19201487 U JP19201487 U JP 19201487U JP H0529932 Y2 JPH0529932 Y2 JP H0529932Y2
- Authority
- JP
- Japan
- Prior art keywords
- slope
- float
- main body
- fuel
- weight ball
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 22
- 238000009423 ventilation Methods 0.000 claims description 16
- 230000002265 prevention Effects 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は車両の燃料タンクに対する燃料の過
給防止弁の改良に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of a fuel supercharging prevention valve for a fuel tank of a vehicle.
（従来の技術）
一般に車両では、概略第５図に示すように燃料
タンクＴ内の上部を、燃料満タン時に一定容積の
蒸気溜め室T1となし、この溜め室T1には、途中
に一定の蒸気圧で作動する二方向弁V1を備え車
両の停止時や走行時にタンク内に生じる燃料蒸気
を主キヤニスタC1にチヤージさせる第１ベンチ
レーシヨンパイプP1と途中に給油ノズルｎの挿
入、抜取りにより開閉される仕切弁V2を設け、
給油時にタンクＴ内に生じる燃料蒸気を副キヤニ
スタC2にチヤージさせる第２ベンチレーシヨン
パイプP2が連結されている。この第２ベンチレ
ーシヨンパイプP2の端部はタンクＴ中に挿入さ
れ、その先端にはフロートを内蔵した過給防止用
のバルブｖが取付けられ、給油管T2に給油ノズ
ルｎを挿入した際、仕切弁v2が開かれ、給油時に
タンクＴ内に生じた燃料蒸気がバルブｖのガス孔
から第２ベンチレーシヨンパイプP2を通つて副
キヤニスタC2にチヤージされ、かくて、所定量
の燃料がタンクＴに収容されれば、バルブｖのフ
ロートが押し上げられて、ベンチレーシヨンパイ
プP2の入口を閉じるようになされている。(Prior Art) In general, in a vehicle, as schematically shown in FIG . It is equipped with a two-way valve V1 that operates at a constant vapor pressure, and a first ventilation pipe P1 that charges fuel vapor generated in the tank when the vehicle is stopped or running to the main canister C1 , and a refueling nozzle N midway. Equipped with a gate valve V 2 that opens and closes by inserting and extracting.
A second ventilation pipe P2 is connected to the secondary canister C2 to charge fuel vapor generated in the tank T during refueling. The end of this second ventilation pipe P2 was inserted into the tank T, a supercharging prevention valve v with a built-in float was attached to its tip, and a refueling nozzle n was inserted into the refueling pipe T2 . At this time, the gate valve v 2 is opened, and the fuel vapor generated in the tank T during refueling is charged from the gas hole of the valve v to the auxiliary canister C 2 through the second ventilation pipe P 2 . When a certain amount of fuel is stored in the tank T, the float of the valve v is pushed up to close the inlet of the ventilation pipe P2 .
（考案が解決しようとする問題点）
ところで、上記の燃料蒸気の処理装置におい
て、車両の停止時や走行時にタンク内に生じる燃
料蒸気を処理する第１ベンチレーシヨンパイプに
は、通常車両が転倒した際にパイプラインをカツ
トする手段が設けられているが、給油時の燃料蒸
気を処理する第２ベンチレーシヨンパイプにはそ
のような手段がなく、車両が転倒してパイプライ
ンが破損した際にはタンク中の燃料が外部に流出
し、火災を起す危険がある。(Problem to be solved by the invention) By the way, in the above-mentioned fuel vapor processing device, the first ventilation pipe, which processes the fuel vapor generated in the tank when the vehicle is stopped or running, usually has a However, the second ventilation pipe, which handles fuel vapor during refueling, does not have such a means to cut the pipeline when the vehicle falls over and the pipeline is damaged. There is a risk that the fuel in the tank may leak outside and cause a fire.
そこで、この考案は他に余分な手段を用いるこ
となく、過給防止用のバルブを改良して、車両が
転倒した際に第２ベンチレーシヨンパイプの入口
を直ちに遮断して燃料の流出を防止することを目
的とする。 Therefore, this invention improves the supercharging prevention valve without using any other extra measures, and immediately shuts off the inlet of the second ventilation pipe when the vehicle overturns, preventing fuel from flowing out. The purpose is to
（問題点を解決するための手段および作用）
上記目的のもとにこの考案は、燃料の過給防止
用のバルブとして、コツプ状の本体と、テーパシ
ート部および窓孔を備え給油時の燃料蒸気を通す
ベンチレーシヨン通路に連なるキヤツプ体とから
なり、本体中には斜截円ちゆう体状の斜面体を回
動可能に支持し、該斜面体の斜面上にはウエイト
ボールを転動自在に配設すると共にウエイトボー
ルの上部には上記通路開閉用のフロートを配設し
たことを特徴としている。(Means and effects for solving the problem) Based on the above-mentioned purpose, this invention is a valve for preventing supercharging of fuel, which has a tap-shaped body, a tapered seat part, and a window hole. It consists of a cap body connected to a ventilation passage through which steam passes, and a slanted oblique body is rotatably supported in the main body, and a weight ball is rolled on the slope of the slanted body. It is characterized in that it can be freely disposed and a float for opening and closing the passage is disposed above the weight ball.
そして、通常には、給油時に燃料タンク内に発
生する燃料蒸気はキヤツプ体の窓孔を通つて本体
中に入り、ベンチレーシヨン通路側に流れてい
き、燃料液面の上昇によりフロートが浮上しテー
パシート部に当接して通路を閉じる。 Normally, fuel vapor generated in the fuel tank during refueling enters the main body through the window hole in the cap and flows toward the ventilation passage, and the float rises as the fuel liquid level rises. Closes the passage by coming into contact with the tapered seat part.
一方、車両が転倒したり大きく傾いたりした場
合には、ウエイトボールが斜面体の回動を伴いな
がらまたは伴わないで、斜面体の高い側に転動
し、フロートを押し上げてテーパシート部に圧接
させ、蒸気通路を直ちに遮断する。 On the other hand, if the vehicle falls or tilts significantly, the weight ball rolls to the higher side of the slope body with or without rotation of the slope body, pushing up the float and pressing it against the tapered seat part. and immediately shut off the steam passage.
（実施例）
第１図はこの考案に係る過給防止用のバルブｖ
の一例を示すものであり、１は合成樹脂、軽金属
等によるコツプ状の本体で、底壁の中央部には円
形の支持突部１ｂが設けられ、そこには斜截円ち
ゆう状の斜面体４が底面中央の凹所４ａを介して
回動可能に支持されて本体１中に収容されてお
り、この斜面体４の上端斜面４ｂ上には所要大き
さのウエイトボール５が転動自在に載置されると
共にボール５上には、上部が半球状、下部が円柱
状に形成されたフロート３が載置されている。こ
の場合、通常にはボール５およびフロート３は自
重で実線のように斜面体４の低い側すなわち下降
した位置にある。(Example) Figure 1 shows the supercharging prevention valve v according to this invention.
An example is shown in which 1 is a pot-shaped main body made of synthetic resin, light metal, etc., and a circular support protrusion 1b is provided in the center of the bottom wall, and there is a slope with an oblique circular shape. A body 4 is rotatably supported through a recess 4a at the center of the bottom surface and accommodated in the body 1, and a weight ball 5 of a required size is freely rollable on the upper end slope 4b of the slope body 4. A float 3 is placed on the ball 5 and has a hemispherical upper part and a cylindrical lower part. In this case, the ball 5 and the float 3 are normally on the lower side of the slope body 4, that is, in a lowered position, as shown by the solid line due to their own weight.
また、本体１は底壁および周壁低部に複数の燃
料流入用の小孔６を備え、かつ上端開口部には横
に広がるつば部１ａを備えていて、このつば１ａ
がキヤツプ体２の下端の同じく横に広がつたつば
部２ａに突き合せられて結合されている。 Further, the main body 1 is provided with a plurality of small holes 6 for fuel inflow in the bottom wall and the lower part of the peripheral wall, and is provided with a laterally widening flange 1a at the upper end opening, and this flange 1a
is butted against and coupled to a laterally widening flange 2a at the lower end of the cap body 2.
キヤツプ体２は上記下端の横に広がつたつば部
２ａとその上のテーパシート部２ｂおよび上端の
短筒部２ｃからなり、つば部２ａの直上部周壁に
は複数の蒸気流入用の窓孔７が設けられ、短筒部
２ｃによりタンクの蒸気溜め室T1内に突出する
第２ベンチレーシヨンパイプP2の端部に装着さ
れている。 The cap body 2 consists of a flange portion 2a that widens laterally at the lower end, a tapered sheet portion 2b above the flange portion 2a, and a short cylindrical portion 2c at the upper end.The peripheral wall directly above the flange portion 2a is provided with a plurality of window holes for steam inflow. 7 is provided and is attached to the end of the second ventilation pipe P2 which projects into the steam storage chamber T1 of the tank by means of the short cylindrical portion 2c.
このような構成のため、給油時にタンク内に発
生し上昇する燃料蒸気は本体１およびキヤツプ体
２の横に広がつたつば部１ａ，２ａにより、一た
ん側方に向けられつば部１ａ，２ａを越えたとこ
ろで反転し、窓孔７から斜め下向きに本体１中に
流入し、フロート３の頭部を下方に押圧してその
浮き上りを防止しつつ第２ベンチレーシヨンパイ
プP2側に流れていく。 Due to this structure, fuel vapor generated and rising inside the tank during refueling is once directed to the side by the flange portions 1a and 2a that spread laterally of the main body 1 and the cap body 2. When it crosses over, it reverses, flows diagonally downward into the main body 1 through the window hole 7, and flows toward the second ventilation pipe P2 while pressing the head of the float 3 downward to prevent it from floating up. To go.
そして、タンク内の燃料液面が上昇してきて、
燃料が本体底部の小孔１ａから本体１中に入るよ
うになれば、フロート３が浮上し始め、液面が所
定レベルに達することにより、キヤツプ体２のテ
ーパシート面２ｂに圧接してベンチレーシヨン通
路を閉じる。 As the fuel level in the tank rises,
When the fuel enters the main body 1 through the small hole 1a at the bottom of the main body, the float 3 begins to float, and when the liquid level reaches a predetermined level, it comes into pressure contact with the tapered seat surface 2b of the cap body 2, and the ventilator Close the Shion passage.
また、車両が転倒したり、大きく傾いたりした
場合には、そのシヨツクで本体１中のウエイトボ
ール５が斜面体４の回動を伴いながらまたは伴わ
ないで、斜面体４の斜面４ｂ上を高い方に転動し
て１図の点線または鎖線の位置を占めることにな
り、フロート３を突き上げその頭部をテーパシー
ト面２ｂに圧接させてベンチレーシヨン通路を直
ちに遮断する。 In addition, when the vehicle overturns or tilts significantly, the weight ball 5 in the main body 1 moves high on the slope 4b of the slope body 4 with or without rotation of the slope body 4. The float 3 is pushed up and its head is brought into pressure contact with the tapered sheet surface 2b, immediately blocking the ventilation passage.
第２図イはフロート３をウエイトボール５上に
直接載置することなく、本体１に形成した段部１
ｃ上に載置させて、ウエイトボール５が転動し易
くした例であり、一方、同図ロ，ハ，ニはそれぞ
れ衝撃を受けた際、斜面体４を回動し易くした例
を示し、ロ図は斜面体４の高い側の内部におもり
４ｃを埋設したもので、ハ図は本体底壁の支持突
部１ｂおよび斜面体底面の凹所４ａをともに円錐
状に形成すると共に凹所４ａの頂角を支持突部１
ｂの頂角よりも大きくして斜面体４が回動に加え
てシーソ運動をするようにしたもので、ニ図は本
体底壁の支持突部１ｂと斜面体凹所４ａとの間に
ベアリング４ｄを設けたものである。 Figure 2A shows a stepped portion 1 formed on the main body 1 without placing the float 3 directly on the weight ball 5.
This is an example in which the weight ball 5 is placed on top of C to make it easier to roll. On the other hand, B, C and D in the same figure show examples in which the slope body 4 is made to rotate easily when receiving an impact. , Figure B shows a weight 4c buried inside the high side of the slope body 4, and Figure C shows that both the support protrusion 1b on the bottom wall of the main body and the recess 4a on the bottom surface of the slope body are formed into a conical shape, and the recess is formed into a conical shape. The apex angle of 4a is supported by the protrusion 1
This is made larger than the apex angle of b so that the slope body 4 performs seesaw movement in addition to rotation, and Figure 2 shows a bearing between the support protrusion 1b on the bottom wall of the main body and the slope body recess 4a. 4d.
また、第３図イ，ロは斜面体４の斜面４ｂをみ
ぞ形に形成して、ウエイトボール５の転動を案内
し、横振れしないようにした例を示すものであ
る。 3A and 3B show an example in which the slope 4b of the slope body 4 is formed in the shape of a groove to guide the rolling motion of the weight ball 5 and prevent it from swinging sideways.
更に、第４図はフロート３を本体１に形成した
段部１ｃ上に載置すると共にウエイトボール５を
斜面体４のみぞ形斜面に載置し、かつ本体１の底
壁を開放して斜面体４を本体１の周壁底部で回動
可能に支持し、そして、斜面体４の片側下端部を
偏心おもり４ｅとして本体底部から横方向に突出
させた別の変更例を示すものである。 Further, in FIG. 4, the float 3 is placed on the stepped portion 1c formed on the main body 1, and the weight ball 5 is placed on the groove-shaped slope of the slope body 4, and the bottom wall of the main body 1 is opened to form the slope. This shows another modification in which the body 4 is rotatably supported at the bottom of the peripheral wall of the main body 1, and the lower end of one side of the sloped body 4 is used as an eccentric weight 4e to protrude laterally from the bottom of the main body.
しかし、それぞれにおける燃料蒸気の流出機
能、液面上昇に伴う通路の遮断機能は上記第１の
例と変りない。 However, the fuel vapor outflow function and the passage blocking function as the liquid level rises in each case are the same as in the first example.
（考案の効果）
以上のようにこの考案では、給油時の燃料蒸気
を通すベンチレーシヨン通路に連結する燃料タン
クの過給防止弁として、コツプ上の本体中に斜截
円ちゆう体状の斜面体を回動可能に支持し、斜面
体の斜面上にはウエイトボールを転動自在に配設
すると共にウエイトボールの上部にベンチレーシ
ヨン通路を開閉するフロートを配設したので、車
両が転倒したり大きく傾いたりした際には、ウエ
イトボールによりフロートを押し上げて蒸気通路
を直ちに遮断することができ、燃料の漏出と火災
の発生を確実に防ぐことができる。(Effects of the invention) As described above, in this invention, a slanted circular body is installed in the main body on the tip as a supercharging prevention valve for the fuel tank connected to the ventilation passage through which fuel vapor passes during refueling. The slope body is rotatably supported, a weight ball is disposed on the slope of the slope body so as to be able to roll freely, and a float is placed above the weight ball to open and close the ventilation passage, so that the vehicle does not fall. If the float is tilted or tilted significantly, the weight ball can be used to push up the float and immediately shut off the steam passage, reliably preventing fuel leakage and fire.
第１図はこの考案の一実施例の断面図。第２図
イはウエイトボールを転動し易くした変更例の一
部の断面図。第２図ロ，ハ，ニはそれぞれ斜面体
を回動し易くした例の要部の断面図。第３図イは
斜面体の斜面にボールガイドを設けた例の要部の
断面図。同図ロはイ図のＡ−Ａ線に沿つた断面
図。第４図は更に他の変更例の断面図。第５図は
車両の燃料蒸気の処理機構の概略説明図。
図中、１……本体、１ａ……つば部、１ｂ……
支持突部、２……キヤツプ体、２ａ……つば部、
２ｂ……テーパシート部、３……フロート、４…
…斜面体、４ｂ……斜面、５……ウエイトボー
ル、６……小孔、７……窓孔。
FIG. 1 is a sectional view of one embodiment of this invention. FIG. 2A is a cross-sectional view of a part of a modified example in which the weight ball is made easier to roll. FIGS. 2B, 2C, and 2 are cross-sectional views of the main parts of an example in which the slope body is made easy to rotate. FIG. 3A is a sectional view of the main part of an example in which a ball guide is provided on the slope of the slope body. Figure B is a sectional view taken along line A-A in Figure A. FIG. 4 is a sectional view of yet another modification. FIG. 5 is a schematic explanatory diagram of a fuel vapor processing mechanism of a vehicle. In the figure, 1... main body, 1a... brim, 1b...
Support protrusion, 2... Cap body, 2a... Rim part,
2b...Tapered sheet portion, 3...Float, 4...
...Slope body, 4b...Slope, 5... Weight ball, 6... Small hole, 7... Window hole.
Claims (1)
を備え給油時の燃料蒸気を通すベンチレーシヨン
通路に連なるキヤツプ体とからなり、本体中には
斜截円ちゆう体状の斜面体を回動可能に支持し、
該斜面体の斜面上にはウエイトボールを転動自在
に配設すると共にウエイトボールの上部に上記通
路を開閉するフロートを配設してなる燃料タンク
における過給防止弁。 It consists of a cup-shaped main body and a cap body that has a tapered seat part and a window hole and is connected to a ventilation passage through which fuel vapor passes during refueling. support possible,
A supercharging prevention valve for a fuel tank, comprising a weight ball rotatably disposed on the slope of the slope body, and a float for opening and closing the passage above the weight ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19201487U JPH0529932Y2 (en) | 1987-12-19 | 1987-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19201487U JPH0529932Y2 (en) | 1987-12-19 | 1987-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0196337U JPH0196337U (en) | 1989-06-27 |
| JPH0529932Y2 true JPH0529932Y2 (en) | 1993-07-30 |
Family
ID=31482892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19201487U Expired - Lifetime JPH0529932Y2 (en) | 1987-12-19 | 1987-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0529932Y2 (en) |
-
1987
- 1987-12-19 JP JP19201487U patent/JPH0529932Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0196337U (en) | 1989-06-27 |
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