JPH04135826U - Fuel tank vent opening/closing device - Google Patents
Fuel tank vent opening/closing deviceInfo
- Publication number
- JPH04135826U JPH04135826U JP5308191U JP5308191U JPH04135826U JP H04135826 U JPH04135826 U JP H04135826U JP 5308191 U JP5308191 U JP 5308191U JP 5308191 U JP5308191 U JP 5308191U JP H04135826 U JPH04135826 U JP H04135826U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel
- tank
- closing
- fuel tank
- 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 12
- 238000009423 ventilation Methods 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000002265 prevention Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
(57)【要約】
【目的】 給油時には満タンを規制するためにキャニス
タへの通気路を遮断し、走行時には通気路を開放する、
燃料タンクの通気開閉装置を提供する。
【構成】 燃料給油管１のタンク２内端末近くに燃料の
逆流防止弁３を設け、逆流防止弁３とキャニスタ４への
通気開閉弁５の弁体とをばね材アーム９やストローク吸
収リンク10の連結手段６で繋ぎ、逆流防止弁３が開の時
に通気路７が閉じるようにした。
(57) [Summary] [Purpose] When refueling, the air passage to the canister is blocked to prevent the tank from filling up, and when driving, the air passage is opened.
Provides a ventilation opening/closing device for fuel tanks. [Structure] A fuel backflow prevention valve 3 is provided near the end of the fuel supply pipe 1 in the tank 2, and the backflow prevention valve 3 and the valve body of the ventilation opening/closing valve 5 to the canister 4 are connected to a spring material arm 9 or a stroke absorbing link 10. They are connected by a connecting means 6, so that the ventilation passage 7 is closed when the check valve 3 is open.
Description
【０００１】0001
本考案は、給油時には満タンを規制(過充填を規制)するためにキャニスタへの 通気路を遮断し、走行時には通気路を開放する、燃料タンクの通気開閉装置に関 する。 This invention is designed to prevent the canister from being full (to prevent overfilling) when refueling. Regarding the fuel tank ventilation opening/closing device that blocks the ventilation path and opens it when driving. do.
【０００２】0002
大気中へ自動車燃料が気散することを防止しなければならない点については、 最近の大気汚染防止規制に関係することでもあって、重要なことである。 自動車の燃料タンクは温度上昇などによって燃料の蒸発が活発になり、内部圧 力が上がってくる。圧力が高くなる程、燃料蒸気が透過や流出で外へ漏れる危険 が大きくなり、燃料ロスはもちろん、大気汚染にもつながる。また、内圧が高い と衝突時に火災を起こす危険性も増す。 そこで、余分な蒸気はキャニスタへ逃がすために、タンクとキャニスタ間の通 路抵抗を小さくしてタンク圧力が上がらないようにすればよいことになる。 Regarding the need to prevent vehicle fuel from dispersing into the atmosphere, This is an important matter as it relates to recent air pollution control regulations. In automobile fuel tanks, fuel evaporation increases due to temperature rise, and internal pressure increases. Power increases. The higher the pressure, the greater the risk of fuel vapor leaking out through permeation or outflow. becomes large, leading to not only fuel loss but also air pollution. Also, the internal pressure is high There is also an increased risk of fire in the event of a collision. Therefore, in order to release the excess steam to the canister, the ventilation between the tank and the canister is All that is needed is to reduce the road resistance and prevent the tank pressure from rising.
【０００３】0003
ところが、給油時に上記の状態であると、満タン規制が利かなくなる。満タン を規制するには、キャニスタへの通路を閉じるか、通路を高抵抗にすればよい。 また、走行時には、キャニスタへの通路の抵抗が小さいと車体がローリングした 場合、液状燃料がキャニスタへ流れ込む危険が生じる。 一方、満タン規制のためにキャニスタへの通路を閉じると、タンク内圧が上が り給油直後に給油口側に燃料が吹き返してくる危険が生ずる場合もある。 本考案は上記のような相互に矛盾した問題を同時に解決しようとするものであ る。 However, if the above condition occurs when refueling, the full tank regulation will no longer work. Full tank This can be achieved by closing the passage to the canister or by making the passage high resistance. Also, when driving, if the resistance of the path to the canister is low, the vehicle body may roll. If so, there is a risk that liquid fuel will flow into the canister. On the other hand, when the passage to the canister is closed to prevent the tank from filling up, the internal pressure of the tank increases. In some cases, there is a danger that fuel will blow back into the fuel filler port immediately after refueling. This invention attempts to simultaneously solve the above mutually contradictory problems. Ru.
【０００４】0004
上記課題を本考案では燃料タンクの通気開閉装置を、燃料給油管１のタンク２ 内端末近くに燃料の逆流防止弁３を取り付け、逆流防止弁３とキャニスタ４への 通気開閉弁５の弁体とを連結手段６で繋ぎ、逆流防止弁３が開の時に通気路７が 閉じるようにした。 ここで通気開閉弁５はフロート形弁体5aに球８内蔵の傾斜閉止形が好ましく、 連結手段６はばね材アーム９とか、ストローク吸収リンク10が好ましい態様であ る。 In order to solve the above problem, in this invention, the ventilation opening/closing device of the fuel tank is changed to the tank 2 of the fuel supply pipe 1. Install the fuel check valve 3 near the inner end, and connect the check valve 3 and the canister 4. The valve body of the ventilation opening/closing valve 5 is connected with the connecting means 6, and the ventilation passage 7 is connected to the valve body of the ventilation opening/closing valve 5 by the connecting means 6. I tried to close it. Here, the ventilation opening/closing valve 5 is preferably a tilted closing type with a built-in ball 8 in a float type valve body 5a. A preferred embodiment of the connecting means 6 is a spring material arm 9 or a stroke absorbing link 10. Ru.
【０００５】[0005]
逆流防止弁３は走行時には閉の状態になっており、給油時には燃料の流れで開 状態になる。そして、燃料が逆流するとその勢いで弁は閉じて給油口からの吹き 返しを防止するが、キャニスタ通路開閉弁は逆流防止弁から伸びたレバーと共動 し、逆流防止弁が開くと通路を閉じる。そこで、タンク内圧力が急には抜けない 状態であって、給油時の満タン規制ができる。 The check valve 3 is closed when driving, and is opened by the flow of fuel when refueling. become a state. When the fuel flows backwards, the force closes the valve and the fuel is blown from the filler port. The canister passage opening/closing valve works together with the lever extending from the check valve. When the check valve opens, the passage is closed. Therefore, the pressure inside the tank cannot be released suddenly. It is possible to regulate the tank to be full when refueling.
【０００６】 また、車体のローリング時にはその開閉弁が通路を閉じるように動く球が開閉 弁に組み込まれているので、キャニスタに液状燃料が流れ込むことはない。 開閉弁の弁体はフロートの機能を持たせているので、通気路に波が来た時にも 通気路を閉じ燃料がキャニスタへ流れ込まない。また、燃料レベルが上がりすぎ ても開閉弁が通気路を閉じるので確実に満タン規制できる。すなわち、開閉弁に フロート機能がなければ、満タンに近くなったときに少流量で給油すると、常に 通気路が開いているから、燃料はタンクへいくらでも入るのである。[0006] In addition, when the car body rolls, the on-off valve opens and closes the ball that moves to close the passage. Since it is integrated into the valve, no liquid fuel will flow into the canister. The valve body of the on-off valve has a float function, so even when waves come into the air passage, Close the air passage to prevent fuel from flowing into the canister. Also, the fuel level may be too high. Since the on-off valve closes the ventilation path even when the tank is filled, it is possible to reliably control the tank to be full. In other words, the on-off valve Without the float function, refueling at a low flow rate when the tank is nearly full will always cause Since the air passage is open, any amount of fuel can enter the tank.
【０００７】 この弁体5aに液体側と通じているオリフィス5bを設けておくと、満タン後しば らくすると、フロート内に液体が入り弁体が降りて開弁状態になり、キャニスタ への通路が開かれる。 また、タンク内圧力が高い状態で通気開閉弁５が閉じていて、通気路７との圧 力差があっても、圧力や波の力で逆流防止弁３が閉じる動作により連結手段６で 通気開閉弁５は強制的に開けられる。これによって、通気開閉弁５が開かなくな る現象が生じない。[0007] If this valve body 5a is provided with an orifice 5b that communicates with the liquid side, it will be possible to When the float is relaxed, liquid enters the float and the valve body descends, opening the valve and opening the canister. A passage to is opened. In addition, if the vent opening/closing valve 5 is closed when the tank internal pressure is high, the pressure with the vent passage 7 is Even if there is a force difference, the connecting means 6 closes the check valve 3 due to pressure or wave force. The vent opening/closing valve 5 is forcibly opened. This prevents the ventilation on-off valve 5 from opening. This phenomenon does not occur.
【０００８】[0008]
図１〜３は本考案の第１実施例を示しており、図１は要部破断全体側面図、図 ２は図１の要部拡大図、図３は図２のA-A部断面図である。 この装置は燃料タンク２に接続されている燃料給油管１のタンク内端末に上部 を軸支されたプレート状の逆流防止弁３が設けられている。また、タンクの上部 にはキャニスタ４への通気開閉弁５が設けられている。この通気開閉弁５は上面 に通気路７があり、底面が多数の通気孔を有し中央を最も低く形成した弁ケーシ ング5cの内部へフロート形弁体5aと球８を内蔵させている。弁体5aの上面にはオ リフィス5bを設けている。また、弁体5aの上部付近へ係止突起5dがある。 1 to 3 show a first embodiment of the present invention, and FIG. 1 is a side view of the main part broken away, and 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. This device is installed at the upper end of the fuel supply pipe 1 connected to the fuel tank 2 inside the tank. A plate-shaped check valve 3 is provided which is pivotally supported. Also, the top of the tank is provided with a ventilation opening/closing valve 5 for the canister 4. This vent opening/closing valve 5 is located on the top surface. The valve case has a ventilation passage 7 on the bottom, has many ventilation holes on the bottom, and is the lowest in the center. A float type valve body 5a and a ball 8 are built into the ring 5c. The upper surface of the valve body 5a is Refice 5b is provided. Furthermore, there is a locking protrusion 5d near the top of the valve body 5a.
【０００９】 弁体5aの係止突起5dは前述した逆流防止弁３との間を連結手段６で繋ぐのに用 いられる。この実施例では逆流防止弁３のヒンジ部3a近傍にばね材アーム９の一 端を固定し、ばね材アーム９の他端がこの弁体5aの係止突起5dへ係合するように なっている。ばね材アーム９は名の如く弾性を有したばね体であって、弁体付近 は二股にすると共に中間部を屈曲させて取付け位置の整合と効果的な弾性を発揮 するようにしている。これにより、逆流防止弁３が開の時、通気路７が閉じるよ うになっている。また、車体のローリング時等においても通気開閉弁５が自由に 通路を閉じることができる。 タンク内圧力が高い状態で通気開閉弁５が閉じていると、通気路７との圧力差 によって通気開閉弁５が開かなくなる現象が生じる。このような場合、圧力や波 の力で逆流防止弁３が閉じる動作により連結手段６で通気開閉弁５は強制的に開 けられるのである。[0009] The locking protrusion 5d of the valve body 5a is used to connect the above-mentioned non-return valve 3 with the connecting means 6. I can stay. In this embodiment, one of the spring material arms 9 is located near the hinge portion 3a of the check valve 3. Fix the end, and make sure that the other end of the spring arm 9 engages with the locking protrusion 5d of the valve body 5a. It has become. As the name suggests, the spring material arm 9 is an elastic spring body, and is located near the valve body. is bifurcated and the middle part is bent to align the mounting position and provide effective elasticity. I try to do that. This allows the ventilation path 7 to close when the check valve 3 is open. The sea urchin is turning. In addition, the ventilation opening/closing valve 5 can be freely operated even when the vehicle body is rolling. Passages can be closed. If the vent opening/closing valve 5 is closed when the tank internal pressure is high, the pressure difference with the vent passage 7 will increase. This causes a phenomenon in which the vent opening/closing valve 5 does not open. In such cases, pressure or waves When the non-return valve 3 closes with the force of You will be kicked.
【００１０】 図４は他の実施例を示す図２相当断面図である。この例では連結手段６がスト ローク吸収リンク10であることを特徴としている。すなわち、ストローク吸収リ ンク10は逆流防止弁３に連結したリンク10aと、前記弁体5aの係止突起5dへ係合 する二股かつ、くの字形状のリンク10bとからなり、リンク10aとリンク10bとの 間は後者の端部に設けた穴10cに対して前者の端部を直角方向に挿入し、その間 を圧縮ばね10dや連結手段で連結した構造であると、タンク内圧力が高い状態で 通気開閉弁５が閉じていると、通気路７との圧力差によって通気開閉弁５が開か なくなる現象が生じるが、圧力や波の力で逆流防止弁３が閉じる動作により連結 手段６で通気開閉弁５は強制的に開けられる。連結手段にばねを使っているのは 逆流防止弁の開閉ストロークと通気開閉弁のそれが違うので調整するためと、球 ８により通気開閉弁５を閉じるよりは、閉じようとする力を弱く設定するためで ある。0010 FIG. 4 is a sectional view corresponding to FIG. 2 showing another embodiment. In this example, the connecting means 6 is It is characterized by 10 Rourke absorption links. In other words, the stroke absorption The link 10 engages with the link 10a connected to the check valve 3 and the locking protrusion 5d of the valve body 5a. It consists of a fork and a dogleg-shaped link 10b, and the link 10a and link 10b are Insert the former end perpendicularly into the hole 10c made in the latter end, and If the structure is such that they are connected using a compression spring 10d or a connecting means, the When the ventilation on-off valve 5 is closed, the pressure difference with the ventilation path 7 causes the ventilation on-off valve 5 to open. However, the connection is restored due to the action of the check valve 3 closing due to pressure or wave force. The vent opening/closing valve 5 is forcibly opened by the means 6. What uses a spring as a connecting means? The opening/closing stroke of the check valve is different from that of the ventilation opening/closing valve, so it is necessary to adjust it and to adjust the valve. This is because the closing force is set to be weaker than when the ventilation opening/closing valve 5 is closed by 8. be.
【００１１】[0011]
本考案は以上のような構造であるから、余分な蒸気をキャニスタへ逃がすこと ができ、また、給油時に満タンを確実に規制することができる。更に、車体がロ ーリングした場合でも、液状燃料がキャニスタへ流れ込まない。 本考案はこのように相互に矛盾した問題を同時に解決し、その結果、給油時に も走行時にも燃料漏れを防ぐ、安全性の高い燃料タンクとなっている。 Since the present invention has the above structure, it is possible to release excess steam to the canister. In addition, it is possible to reliably limit the tank to full when refueling. Furthermore, the car body is Liquid fuel does not flow into the canister even when the tank is ringed. This invention thus solves these mutually contradictory problems at the same time, and as a result, when refueling, The fuel tank is highly safe and prevents fuel leakage even when driving.
【図１】要部破断全体側面図である。FIG. 1 is a side view of the entire main part broken away.
【図２】図１の要部拡大図である。FIG. 2 is an enlarged view of the main part of FIG. 1;
【図３】図２のA-A部断面図である。FIG. 3 is a sectional view taken along line A-A in FIG. 2;
【図４】他の実施例を示す図２相当断面図である。FIG. 4 is a sectional view corresponding to FIG. 2 showing another embodiment.
１ 燃料給油管 ２ タンク ３ 逆流防止弁 ４ キャニスタ ５ 通気開閉弁 ６ 連結手段 ７ 通気路 ８ 球 ９ ばね材アーム 10 ストローク吸収リンク 1 Fuel supply pipe 2 tank 3 Backflow prevention valve 4 Canister 5 Ventilation on/off valve 6 Connection means 7 Ventilation path 8 balls 9 Spring material arm 10 stroke absorption link
Claims (4)
料の逆流防止弁３を設け、逆流防止弁３とキャニスタ４
への通気開閉弁５の弁体とを連結手段６で繋ぎ、逆流防
止弁３が開の時に通気路７が閉じるようにしてなる燃料
タンクの通気開閉装置。Claim 1: A fuel backflow prevention valve 3 is provided near the end of the fuel supply pipe 1 in the tank 2, and the backflow prevention valve 3 and the canister 4 are connected to each other.
This vent opening/closing device for a fuel tank is constructed by connecting the valve body of a vent opening/closing valve 5 to the fuel tank with a connecting means 6 so that a vent passage 7 is closed when the check valve 3 is open.
蔵の傾斜閉止形である請求項１記載の燃料タンクの通気
開閉装置。2. The vent opening/closing device for a fuel tank according to claim 1, wherein the vent opening/closing valve 5 is of an inclined closing type with a ball 8 built into a float-shaped main body.
項１記載の燃料タンクの通気開閉装置。3. The fuel tank ventilation opening/closing device according to claim 1, wherein the connecting means 6 is a spring material arm 9.
ある請求項１記載の燃料タンクの通気開閉装置。4. The fuel tank ventilation opening/closing device according to claim 1, wherein the connecting means 6 is a stroke absorbing link 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5308191U JPH04135826U (en) | 1991-06-12 | 1991-06-12 | Fuel tank vent opening/closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5308191U JPH04135826U (en) | 1991-06-12 | 1991-06-12 | Fuel tank vent opening/closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04135826U true JPH04135826U (en) | 1992-12-17 |
Family
ID=31929071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5308191U Pending JPH04135826U (en) | 1991-06-12 | 1991-06-12 | Fuel tank vent opening/closing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04135826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016169629A (en) * | 2015-03-11 | 2016-09-23 | トヨタ自動車株式会社 | Fuel tank |
-
1991
- 1991-06-12 JP JP5308191U patent/JPH04135826U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016169629A (en) * | 2015-03-11 | 2016-09-23 | トヨタ自動車株式会社 | Fuel tank |
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