JPH06262953A - Fuel cut-off valve device - Google Patents

Fuel cut-off valve device

Info

Publication number
JPH06262953A
JPH06262953A JP5118293A JP5118293A JPH06262953A JP H06262953 A JPH06262953 A JP H06262953A JP 5118293 A JP5118293 A JP 5118293A JP 5118293 A JP5118293 A JP 5118293A JP H06262953 A JPH06262953 A JP H06262953A
Authority
JP
Japan
Prior art keywords
fuel
case
valve seat
fuel tank
discharge hole
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
Application number
JP5118293A
Other languages
Japanese (ja)
Inventor
Osao Yamashita
長生 山下
Yasunobu Nakatsu
安宣 中津
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to JP5118293A priority Critical patent/JPH06262953A/en
Publication of JPH06262953A publication Critical patent/JPH06262953A/en
Pending legal-status Critical Current

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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PURPOSE:To prevent air pollution and degradation of the performance of a canister by restricting the inflow of raw fuel splashed in the air chamber part of a fuel tank, into a case at the time of turn traveling of a vehicle or running on a wavy road surface. CONSTITUTION:A fuel cut-off valve device has a valve seat opening part 22 and a discharge hole 24. The area ratio S=SD/Sd of the total opening area SD of the discharge hole 24 to the opening area Sd of the valve seat opening part 22 is set to a range of approximately 6-30.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は自動車の燃料タンク内の
燃料油面上昇時に生燃料が大気側へ流出することを防止
するフューエルカットオフバルブ装置に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cutoff valve device for preventing raw fuel from flowing out to the atmosphere when the fuel oil level in a fuel tank of an automobile rises.

【0002】[0002]

【従来の技術】従来、燃料タンク内の燃料蒸発ガスをキ
ャニスタに吸着させるようにして大気汚染を防止する装
置として、図3に示すように、燃料タンク1内の気室部
2の上部とキャニスタ3とを連通路4で連通したものが
ある。
2. Description of the Related Art Conventionally, as a device for adsorbing fuel vaporized gas in a fuel tank to a canister to prevent air pollution, as shown in FIG. There is one in which 3 and 3 are connected by a communication passage 4.

【0003】このような装置においては、燃料タンク1
内の燃料油面が、例えば車両の傾斜時或いは転倒時等に
おいて所定以上に上昇すると、その生燃料が連通路4を
通じてキャニスタ3へ流出し、キャニスタ3の吸着性能
を劣化させる虞れがある。
In such an apparatus, the fuel tank 1
If the fuel oil level inside rises above a predetermined level, for example, when the vehicle leans or falls, the raw fuel may flow out to the canister 3 through the communication passage 4, and the adsorption performance of the canister 3 may deteriorate.

【0004】そのため、従来、上記連通路4の燃料タン
ク側開口部の近傍に位置してフューエルカットオフバル
ブ装置5を設置し、上記のように燃料油面が所定以上に
上昇した時に、このフューエルカットオフバルブ装置5
によって連通路4内への生燃料の流出を遮断するように
したものがある。
Therefore, conventionally, the fuel cutoff valve device 5 is installed near the opening of the communication passage 4 on the fuel tank side, and when the fuel oil level rises above a predetermined level as described above, this fuel is cut off. Cut-off valve device 5
In some cases, the outflow of raw fuel into the communication passage 4 is blocked by the above.

【0005】そして、このフューエルカットオフバルブ
装置5の構造として、例えば図4に示すような構造のも
のがある(実開昭63−7030号公報中の図3参
照)。この図4に示すフューエルカットオフバルブ装置
においてその構造及び機能の概略を説明する。
As a structure of the fuel cutoff valve device 5, for example, there is a structure as shown in FIG. 4 (see FIG. 3 in Japanese Utility Model Laid-Open No. 63-7030). An outline of the structure and function of the fuel cutoff valve device shown in FIG. 4 will be described.

【0006】1は燃料タンクを示し、図では上壁を示
す。2は燃料タンク1内の気室部である。5は気室部2
において燃料タンク1に固設されたフューエルカットオ
フバルブ装置で、下部に燃料の出入穴5aと上端部に燃
料蒸発ガスの排出穴5bを形成したケース5cを設け、
このケース5c内に、上端に弁部5dを形成したフロー
ト弁5eを昇降可能に収納し、弁部5dの上部に弁座開
口部5fを対向固設して構成されている。5gはフロー
ト弁5eの上動を補助するスプリングである。
Reference numeral 1 denotes a fuel tank, and the upper wall is shown in the figure. Reference numeral 2 is an air chamber in the fuel tank 1. 5 is the air chamber part 2
In the fuel cut-off valve device fixedly installed in the fuel tank 1, a case 5c having a fuel inlet / outlet hole 5a in the lower portion and a fuel vapor discharge hole 5b in the upper end portion is provided,
In the case 5c, a float valve 5e having a valve portion 5d formed at the upper end is housed so as to be able to move up and down, and a valve seat opening 5f is fixedly provided opposite to the upper portion of the valve portion 5d. 5g is a spring that assists the upward movement of the float valve 5e.

【0007】4は前記のようにキャニスタ3に連通した
連通路で、その開口端4aが、上記弁座開口部5f、ケ
ース5c内及び排出口5bを介して気室部2に連通する
室6に開口している。
Reference numeral 4 denotes a communication passage communicating with the canister 3 as described above, and the opening end 4a thereof communicates with the air chamber 2 through the valve seat opening 5f, the case 5c, and the discharge port 5b. It is open to.

【0008】そして、燃料タンク1内の燃料油面Lが、
所定以上に上昇した場合には、フロート弁5eが上昇
し、その弁部5dが弁座開口部5fを閉塞して、連通路
4への燃料流出を防止する。
The fuel oil level L in the fuel tank 1 is
When it rises above a predetermined level, the float valve 5e rises, and its valve portion 5d closes the valve seat opening 5f to prevent fuel from flowing out to the communication passage 4.

【0009】また、気室部2内に発生した燃料蒸発ガス
は矢印で示すように、排出穴5bからケース5c内に流
入し、弁座開口部5f、室6を通じて連通路4へ排出さ
れる。
Further, the fuel evaporative gas generated in the air chamber 2 flows into the case 5c through the discharge hole 5b and is discharged to the communication passage 4 through the valve seat opening 5f and the chamber 6 as shown by the arrow. .

【0010】[0010]

【発明が解決しようとする課題】車両の停止中又は安定
した走行状態では、燃料タンク内の油面の揺動は微小で
あるため、上記図4の矢印のように燃料蒸発ガスのみ連
通路4へ排出する。
When the vehicle is at a standstill or is in a stable running state, the fluctuation of the oil level in the fuel tank is very small. Therefore, as shown by the arrow in FIG. To discharge.

【0011】しかし、車両の旋回走行時や波状路面走行
時などにおいて、油面が図4のL1のように傾斜して
(フロート5eは閉弁作動しない状態)その油面が燃料
蒸発ガスの排出穴5bに近ずき、かつ、燃料タンクの振
動によって油面上に波立ちが生じて生燃料が飛散する
と、気室部2内の圧力とケース5c内の圧力との差圧に
より、その生燃料が排出穴5bからケース5c内に吸い
込まれやすくなる。
However, when the vehicle is turning or running on a wavy road surface, the oil level is inclined as shown by L 1 in FIG. 4 (the float 5e is in a state in which the valve is not closed), and the oil level is the amount of fuel evaporative emission gas. When the raw fuel scatters due to the vibration of the fuel tank due to the approach to the discharge hole 5b and the vibration of the fuel tank, the difference in pressure between the pressure in the air chamber portion 2 and the pressure in the case 5c causes the raw fuel to flow. Fuel is easily sucked into the case 5c through the discharge hole 5b.

【0012】すなわち、油面の変動や温度上昇により気
室部2内の圧力が大気圧よりかなり高くなると、大気圧
とほぼ同圧のケース5c内の圧力との間に、気室部2側
が高圧の大きな差圧が生じ、この差圧により排出穴5b
部に、ケース内方向への速い気流が発生し、この気流に
乗って上記飛散した生燃料がケース5c内に多量に吸い
込まれる。
That is, when the pressure in the air chamber 2 becomes considerably higher than the atmospheric pressure due to the fluctuation of the oil level or the temperature rise, the air chamber 2 side is separated between the atmospheric pressure and the pressure in the case 5c which is almost the same pressure. A large high differential pressure is generated, and this differential pressure causes the discharge hole 5b.
A fast airflow is generated inwardly of the case, and a large amount of the scattered raw fuel is sucked into the case 5c by riding on the airflow.

【0013】このように、生燃料がケース5c内に多量
に吸い込まれると、室6、連通路4を介してキャニスタ
3へ流出し、キャニスタの劣化を早める問題がある。そ
こで本発明は、気室部とケース内との差圧を小さくして
排出穴でのケース内方向への気流を抑制し、飛散した生
燃料のケース内への流入量を少なくして上記の問題を解
決することを目的とするものである。
As described above, when a large amount of raw fuel is sucked into the case 5c, it flows out into the canister 3 through the chamber 6 and the communication passage 4, and there is a problem of accelerating the deterioration of the canister. Therefore, the present invention reduces the differential pressure between the air chamber portion and the case to suppress the air flow in the case toward the inside of the discharge hole, and reduces the amount of scattered raw fuel flowing into the case. The purpose is to solve the problem.

【0014】[0014]

【課題を解決するための手段】本発明は前記の課題を解
決するために、燃料タンク(10)内の油面が所定以上
に上昇した場合にフロート弁(21)が上昇して弁座開
口部(22)を閉塞し、燃料タンク内の生燃料の流出を
阻止するものであって、そのフロート弁(21)を収納
するケース(12)の上端部に気室部(14)とケース
(12)内とを連通する燃料蒸発ガスの排出穴(24)
を形成したものにおいて、上記弁座開口部(22)の開
口面積Sd と上記排出穴(24)の総開口面積S D との
面積比S=SD /Sd を約6以上約30以下に設定した
ことを特徴とするものである。
The present invention solves the above problems.
To determine, the oil level in the fuel tank (10) is above a certain level.
Float valve (21) rises and opens the valve seat
Block the mouth (22) to prevent the outflow of raw fuel from the fuel tank.
The one that blocks the float valve (21)
The case (12) and the air chamber (14) are attached to the upper end of the case (12).
(12) Fuel evaporative gas discharge hole (24) communicating with the inside
In the case where the valve seat opening (22) is opened,
Mouth area SdAnd the total opening area S of the discharge holes (24) DWith
Area ratio S = SD/ SdWas set to about 6 or more and about 30 or less
It is characterized by that.

【0015】[0015]

【作用】面積比Sが約6以下であると、気室部(14)
の高圧とケース(12)内の差圧が大きくなり、排出穴
(24)部における気室部(14)からケース(12)
内方向への気流が速くなり、気室部(14)内に飛散し
た燃料のケース(12)内への流入量が多くなり、室
6、連通路4を介してキャニスタ3へ生燃料が流入す
る。
When the area ratio S is about 6 or less, the air chamber (14)
And the differential pressure in the case (12) become large, and the air chamber (14) in the discharge hole (24) to the case (12).
The inward air flow becomes faster, and the amount of fuel scattered in the air chamber portion (14) into the case (12) increases, and raw fuel flows into the canister 3 through the chamber 6 and the communication passage 4. To do.

【0016】また、面積比Sが約30以上になると、排
出穴(24)の総開口面積が過大となり、飛散した生燃
料がケース12内へ入り込み、室6、連通路4を介して
キャニスタ3へ生燃料が流入し、キャニスタの劣化を早
める。そのため、面積比Sが約6以上約30以下にする
と、気室部(14)とケース(12)内の圧力がほぼ一
定になって、上記の差圧が小さくなり排出穴(24)部
における上記の気流が抑制され、車両の旋回走行時や波
状路面走行時の油面傾斜状態において、油面に大きな波
立ちが発生し、生燃料が飛散した場合、その飛散した生
燃料のケース(12)内への流入が抑制される。
When the area ratio S is about 30 or more, the total opening area of the discharge holes (24) becomes excessively large, and the scattered raw fuel enters the case 12, and the canister 3 passes through the chamber 6 and the communication passage 4. Raw fuel flows in to accelerate the deterioration of the canister. Therefore, when the area ratio S is about 6 or more and about 30 or less, the pressures in the air chamber portion (14) and the case (12) become substantially constant, and the above-mentioned differential pressure becomes small, and the discharge hole (24) portion has When the above-mentioned air flow is suppressed, and when the vehicle has a large swelling on the oil surface and the raw fuel is scattered when the vehicle is turning or traveling on a wavy road surface, the case of the scattered raw fuel (12) The inflow to the inside is suppressed.

【0017】[0017]

【実施例】次に図1に示す本発明の実施例について説明
する。10は車両に設置された燃料タンクで、図では上
壁を示す。
EXAMPLE Next, an example of the present invention shown in FIG. 1 will be described. Reference numeral 10 denotes a fuel tank installed in the vehicle, the upper wall of which is shown in the figure.

【0018】11はフューエルカットオフバルブ装置
で、その筒状のケース12の上端外周に形成した鍔部1
3を、燃料タンクの上壁10に形成した取付穴の周縁上
面に係合し、そのケース12部が燃料タンクの気室部1
4に突出するようにして備えられている。
Reference numeral 11 denotes a fuel cutoff valve device, which is a flange portion 1 formed on the outer periphery of the upper end of a cylindrical case 12.
3 is engaged with the upper surface of the peripheral edge of the mounting hole formed in the upper wall 10 of the fuel tank, and the case 12 part thereof is the air chamber part 1 of the fuel tank.
4 is provided so as to project.

【0019】上部鍔部13はフランジ15を介してガス
ケット16で押えられ、カバー17と共にスクリュ18
で燃料タンクの上壁10に固着されている。上記ケース
12の底部には底蓋19が付設されており、該底蓋19
には燃料の出入口20が形成されている。
The upper flange 13 is pressed by the gasket 16 via the flange 15, and together with the cover 17 the screw 18
It is fixed to the upper wall 10 of the fuel tank. A bottom cover 19 is attached to the bottom of the case 12, and the bottom cover 19 is attached to the bottom cover 19.
A fuel inlet / outlet port 20 is formed in the fuel cell.

【0020】21はケース12内に昇降可能に収納した
フロート弁で、通常は図1の如くその自重で下降して弁
座開口部22を開いており、車両ロールオーバ時はフロ
ート弁21が自重により弁座開口部22を閉塞し、燃料
の流出を防ぐ。
Reference numeral 21 is a float valve housed in the case 12 so as to be able to move up and down. Normally, as shown in FIG. 1, the float valve 21 descends by its own weight to open the valve seat opening 22. The valve seat opening 22 is closed by this to prevent the fuel from flowing out.

【0021】また燃料タンク内の燃料油面が車両の傾斜
等により上昇してフューエルカットオフバルブ11が油
中に浸された場合は、フロート弁21が、その浮力によ
って上昇し、その弁部21aが上部に形成した弁座開口
部22に当接してその弁座開口部22を閉塞するように
なっている。
When the fuel oil level in the fuel tank rises due to the inclination of the vehicle or the like and the fuel cutoff valve 11 is immersed in oil, the float valve 21 rises due to its buoyancy and its valve portion 21a. Touches the valve seat opening 22 formed on the upper part to close the valve seat opening 22.

【0022】23はフロート弁21の浮力を補助するス
プリングである。24はケース12に形成した燃料蒸発
ガスの排出穴で、図1に示すようにケース12の周壁の
上端付近において、ケース12内と気室部14内とを連
通するように形成されている。また、該排出穴24は、
ケース12の周方向に複数個形成されている。
Reference numeral 23 is a spring that assists the buoyancy of the float valve 21. Reference numeral 24 denotes a fuel evaporative gas discharge hole formed in the case 12, which is formed near the upper end of the peripheral wall of the case 12 so as to communicate the inside of the case 12 with the inside of the air chamber portion 14 as shown in FIG. Further, the discharge hole 24 is
A plurality of cases 12 are formed in the circumferential direction.

【0023】6はカバー17によって前記弁座開口部2
2の上部に設けた室、4は連通路で、前記従来構造と同
様に、弁座開口部22から室6内に排出された燃料蒸発
ガスを該連通路4を通じてキャニスタへ排出するように
なっている。
Reference numeral 6 denotes a valve seat opening 2 provided by a cover 17.
Chambers 4 provided at the upper part of 2 are communication passages, and like the conventional structure, the fuel evaporative gas discharged from the valve seat opening 22 into the chamber 6 is discharged to the canister through the communication passages 4. ing.

【0024】次に、上記弁座開口部22の開口面積(流
通面積)と複数個の排出穴24の総開口面積(総流通面
積)との面積比について説明する。弁座開口部22の開
口面積に対して、排出穴24の総開口面積が極度に小さ
いと、ケース12内の蒸発燃料ガスの圧力が弁座開口部
22を通じて流出する単位流出量に比較して、気室部1
4内の蒸発燃料ガスの圧力が排出穴24を通じてケース
12内に流入する単位流入量の方が極めて少なくなり、
ケース12内の圧力が大気圧に近ずき、両圧力間に大き
な差圧が生じる。その結果、排出穴24部におけるケー
ス内方向への気流が速くなり、気室部14内に飛散した
生燃料が上記気流に乗ってケース12内に吸入されやす
くなる。
Next, the area ratio between the opening area (circulation area) of the valve seat opening 22 and the total opening area (total circulation area) of the plurality of discharge holes 24 will be described. If the total opening area of the discharge holes 24 is extremely smaller than the opening area of the valve seat opening 22, the pressure of the evaporated fuel gas in the case 12 will be compared with the unit outflow amount flowing out through the valve seat opening 22. , Air chamber part 1
As for the pressure of the evaporated fuel gas in 4, the unit inflow amount that flows into the case 12 through the discharge hole 24 becomes extremely smaller,
The pressure in the case 12 approaches the atmospheric pressure, and a large pressure difference occurs between the two pressures. As a result, the air flow toward the inside of the case in the discharge hole 24 becomes faster, and the raw fuel scattered in the air chamber portion 14 easily gets into the case 12 along with the air flow.

【0025】これに対し、排出穴24の総開口面積が極
度に大きく、キャニスタに生燃料が流入すると、キャニ
スタの劣化を早める問題がある。そこで、本出願人は、
弁座開口部22の開口面積をSd とし、排出穴24の総
開口面積をSD として次式の関係からなる面積比Sの
値を種々定めて実験した。
On the other hand, the total opening area of the discharge holes 24 is extremely large, and when raw fuel flows into the canister, there is a problem of accelerating the deterioration of the canister. Therefore, the applicant
Experiments were performed by setting the opening area of the valve seat opening 22 to S d and the total opening area of the discharge holes 24 to S D , and setting various values of the area ratio S based on the following equation.

【0026】 面積比(S)=排出穴の総開口面積(SD )/弁座開口面積(Sd )… その結果、図2に示すような値が得られた。図2におい
て、横軸は上記の面積比を示し、縦軸は弁座開口部22
から連通路4側へ流出する燃料流出量を分(min)当
りの量で示したものである。
Area ratio (S) = total opening area of discharge holes ( SD ) / valve seat opening area ( Sd ) ... As a result, a value as shown in FIG. 2 was obtained. In FIG. 2, the horizontal axis indicates the above area ratio, and the vertical axis indicates the valve seat opening 22.
The amount of fuel flowing out from the fuel cell to the side of the communication passage 4 is shown by the amount per minute (min).

【0027】そして、燃料タンクを加振して面積比Sに
対する燃料流出量を測定した結果、燃料タンクを7Hz
で加振した場合にはイの特性となり、13Hzで加振し
た場合にはロの特性となり、10Hzで加振した場合は
ハの特性を示し、面積比が約6以下の場合は上記の差圧
が大きくなって燃料流出量が急激に多くなり、また、面
積比が約30以上になると7Hzの加振状態において燃
料流出量が急激に増加した。
Then, the fuel tank was vibrated and the amount of fuel flowing out with respect to the area ratio S was measured.
When it is vibrated at, the characteristic becomes a, when it is excited at 13 Hz, it becomes the characteristic of B, and when it is excited at 10 Hz, it shows the characteristic of c. When the area ratio is about 6 or less, the difference above The pressure increased and the fuel outflow drastically increased, and when the area ratio became about 30 or more, the fuel outflow drastically increased under the vibration condition of 7 Hz.

【0028】この実験の結果、面積比が約6以上で約3
0以下の範囲において平均的に燃料流出量が少ないこと
が判明した。したがって、この範囲内においては、燃料
タンク10内の油面変動や温度上昇により気室部14内
が高い圧力になった場合で、かつ、車両の旋回走行時や
波状路面走行時などにおいて油面が図1のL1 の如く傾
斜し、更に燃料タンクの振動により、生燃料が飛散した
場合においても、その飛散した生燃料がケース12内に
入りにくくなる。
As a result of this experiment, when the area ratio is about 6 or more, about 3
It was found that the fuel outflow amount was small on average in the range of 0 or less. Therefore, within this range, when the pressure inside the air chamber portion 14 becomes high due to the fluctuation of the oil level in the fuel tank 10 and the temperature rise, and when the vehicle is turning or running on a wavy road, Is inclined as indicated by L 1 in FIG. 1, and when the raw fuel is scattered due to vibration of the fuel tank, the scattered raw fuel is less likely to enter the case 12.

【0029】[0029]

【発明の効果】以上のように本発明によれば、弁座開口
部における開口面積とケースの排出穴における総開口面
積との面積比を特定の値に設定することで、車両の旋回
走行時や波状路面走行時などにおいて、燃料タンクの気
室部に、生燃料が飛散した場合、その気室部内に飛散し
た生燃料のケース内への流入を抑制でき、大気汚染防止
とキャニスタの性能低下防止を図り得る。
As described above, according to the present invention, by setting the area ratio of the opening area of the valve seat opening portion and the total opening area of the discharge holes of the case to a specific value, it is possible to prevent the vehicle from turning. When raw fuel is scattered in the air chamber of the fuel tank when traveling on a corrugated road or on a wavy road surface, it is possible to prevent the raw fuel scattered in the air chamber from flowing into the case, preventing air pollution and degrading the performance of the canister. Can be prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の実施例を示す縦断面図。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

【図2】 面積比に対する燃料流出量を示す特性図。FIG. 2 is a characteristic diagram showing a fuel outflow amount with respect to an area ratio.

【図3】 本発明の装置を適用する燃料タンクとキャニ
スタとの関係を示す図。
FIG. 3 is a diagram showing a relationship between a fuel tank and a canister to which the device of the present invention is applied.

【図4】 従来構造を示す縦断面図。FIG. 4 is a vertical sectional view showing a conventional structure.

【符号の説明】[Explanation of symbols]

10 燃料タンク 12 ケース 14 気室部 21 フロート弁 22 弁座開口部 24 排出穴 10 Fuel Tank 12 Case 14 Air Chamber 21 Float Valve 22 Valve Seat Opening 24 Discharge Hole

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 燃料タンク(10)内の油面が所定以上
に上昇した場合にフロート弁(21)が上昇して弁座開
口部(22)を閉塞し、燃料タンク内の生燃料の流出を
阻止するものであって、そのフロート弁(21)を収納
するケース(12)の上端部に気室部(14)とケース
(12)内とを連通する燃料蒸発ガスの排出穴(24)
を形成したものにおいて、 上記弁座開口部(22)の開口面積Sd と上記排出穴
(24)の総開口面積S D との面積比S=SD /Sd
約6以上約30以下に設定したことを特徴とするフュー
エルカットオフバルブ装置。
1. The oil level in the fuel tank (10) is above a predetermined level.
Float valve (21) rises and opens the valve seat
Block the mouth (22) to prevent the outflow of raw fuel from the fuel tank.
The one that blocks the float valve (21)
The case (12) and the air chamber (14) are attached to the upper end of the case (12).
(12) Fuel evaporative gas discharge hole (24) communicating with the inside
And the opening area S of the valve seat opening (22).dAnd above discharge hole
(24) Total opening area S DArea ratio with S = SD/ SdTo
Few characterized by setting about 6 to about 30
L-cutoff valve device.
JP5118293A 1993-03-12 1993-03-12 Fuel cut-off valve device Pending JPH06262953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5118293A JPH06262953A (en) 1993-03-12 1993-03-12 Fuel cut-off valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5118293A JPH06262953A (en) 1993-03-12 1993-03-12 Fuel cut-off valve device

Publications (1)

Publication Number Publication Date
JPH06262953A true JPH06262953A (en) 1994-09-20

Family

ID=12879711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5118293A Pending JPH06262953A (en) 1993-03-12 1993-03-12 Fuel cut-off valve device

Country Status (1)

Country Link
JP (1) JPH06262953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006129368A1 (en) * 2005-06-01 2006-12-07 Hitachi, Ltd. Fuel feeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006129368A1 (en) * 2005-06-01 2006-12-07 Hitachi, Ltd. Fuel feeder

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