JPH08170568A - Fuel storage device for vehicle - Google Patents
Fuel storage device for vehicleInfo
- Publication number
- JPH08170568A JPH08170568A JP7231242A JP23124295A JPH08170568A JP H08170568 A JPH08170568 A JP H08170568A JP 7231242 A JP7231242 A JP 7231242A JP 23124295 A JP23124295 A JP 23124295A JP H08170568 A JPH08170568 A JP H08170568A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fuel
- valve
- space
- fuel storage
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は車両用燃料貯留装置
に関する。TECHNICAL FIELD The present invention relates to a fuel storage device for a vehicle.
【０００２】[0002]
【従来の技術】燃料タンク内への燃料給油時に燃料タン
ク内に発生している燃料蒸気が外気中に放出されるのを
阻止するために燃料給油時に燃料タンク内の燃料蒸気を
チャコールキャニスタに導びいてチャコールキャニスタ
内の活性炭に吸着させるようにした内燃機関が公知であ
る。この場合、燃料給油時に燃料タンク内に発生してい
る燃料蒸気量が多いとチャコールキャニスタの容量を大
きくしなければならず、チャコールキャニスタを小型化
するためには燃料タンク内における燃料蒸気の発生量を
できるだけ少くする必要がある。2. Description of the Related Art In order to prevent the fuel vapor generated in the fuel tank from being discharged into the outside air when fuel is supplied to the fuel tank, the fuel vapor in the fuel tank is guided to a charcoal canister at the time of fuel supply. An internal combustion engine is known in which the charcoal canister is made to adsorb on activated carbon in a canister. In this case, if the amount of fuel vapor generated in the fuel tank during refueling is large, the capacity of the charcoal canister must be increased, and in order to downsize the charcoal canister, the amount of fuel vapor generated in the fuel tank must be increased. Need to be as small as possible.
【０００３】ところで燃料タンク内に燃料が溜まってい
るときには燃料タンク内の上部空間は燃料蒸気で満たさ
れており、従って燃料タンク内の燃料蒸気発生量を少な
くするには燃料タンク内の上部空間の容積をできるだけ
小さくすることが必要となる。そこで燃料タンク内の上
部空間の容積を小さくするために燃料タンク内の燃料液
面に密着して燃料液面と共に上下動する分離膜を燃料タ
ンク内に配置し、分離膜上に重しの役目をなすプレート
を載置した燃料タンクが公知である（実開昭６０−１５
８９２２号公報参照）。By the way, when fuel is accumulated in the fuel tank, the upper space in the fuel tank is filled with fuel vapor. Therefore, in order to reduce the amount of fuel vapor generated in the fuel tank, the upper space in the fuel tank must be reduced. It is necessary to make the volume as small as possible. Therefore, in order to reduce the volume of the upper space in the fuel tank, a separation membrane, which is in close contact with the fuel liquid surface in the fuel tank and moves up and down together with the fuel liquid surface, is arranged in the fuel tank, and has a role of weight on the separation membrane. There is a known fuel tank on which a plate forming
8922 publication).
【０００４】[0004]
【発明が解決しようとする課題】しかしながらこのよう
に重しを用いると燃料タンクの重さが重くなるという問
題があるばかりでなく、燃料タンク内の構造が複雑にな
るために燃料タンクの製造に時間を要するという問題が
ある。However, not only is there a problem that the weight of the fuel tank becomes heavy when such a weight is used, but also the structure inside the fuel tank becomes complicated, so that the manufacturing of the fuel tank is difficult. There is a problem that it takes time.
【０００５】[0005]
【課題を解決するための手段】上記問題点を解決するた
めに１番目の発明では、燃料タンク内において燃料注入
管から注入された燃料が貯留されて形成される燃料貯留
部と、該燃料貯留部と燃料タンク内壁の間に形成される
空間部のいずれか一方を可撓性材料からなる袋状の伸縮
膜で包囲して互いに分離せしめ、前記空間部に前記空間
部の圧力を大気圧よりも高い圧力に保持可能な調圧装置
が接続されている。この様に構成することにより、１番
目の発明では燃料タンク収容容器内の内部空間の圧力は
調圧装置により大気圧よりも高い圧力に保持可能であ
り、この内部空間の圧力によって燃料タンクの容積が減
少せしめられる。In order to solve the above problems, in the first invention, a fuel storage portion formed by storing fuel injected from a fuel injection pipe in a fuel tank, and the fuel storage portion And one of the spaces formed between the fuel tank and the inner wall of the fuel tank are surrounded by a bag-shaped stretchable film made of a flexible material so as to be separated from each other, and the pressure of the space in the space is more than atmospheric pressure. Is connected to a pressure regulator capable of maintaining a high pressure. With this configuration, in the first aspect of the invention, the pressure of the internal space in the fuel tank container can be maintained at a pressure higher than the atmospheric pressure by the pressure regulator, and the pressure of the internal space allows the volume of the fuel tank to be increased. Is reduced.
【０００６】また、２番目の発明によれば上記問題点を
解決するために１番目の発明において、調圧弁装置は内
部空間内の圧力が大気圧よりも高い予め定められた正圧
よりも高くなったとき又は該内部空間内の圧力が大気圧
よりも低くなったときに開弁せしめられる。この様に構
成することにより、２番目の発明では燃料タンク収容容
器内の内部空間の圧力は調圧弁装置によって大気圧と予
め定められた正圧との間の圧力に保持される。According to the second invention, in order to solve the above-mentioned problems, in the first invention, the pressure regulating valve device has a pressure in the internal space higher than the atmospheric pressure and higher than a predetermined positive pressure. The valve is opened when the pressure in the internal space becomes lower than the atmospheric pressure. With this configuration, in the second invention, the pressure of the internal space in the fuel tank container is maintained at a pressure between the atmospheric pressure and a predetermined positive pressure by the pressure regulating valve device.
【０００７】また、３番目の発明によれば、上記問題点
を解決するために１番目の発明において、燃料タンク内
の圧力が大気圧よりも高い予め定められた正圧を越えた
ときに開弁して燃料タンク内の燃料蒸気をチャコールキ
ャニスタ内に送り込むタンク内圧制御弁を具備し、調圧
弁装置は内部空間内の圧力が大気圧よりも高い予め定め
られた正圧よりも高くなったときに開弁する正圧リリー
フ弁を具備し、正圧リリーフ弁の開弁圧がタンク内圧制
御弁の開弁圧よりも高く設定されている。この様に構成
することにより、３番目の発明では燃料タンク内の圧力
は最も高くても正圧リリーフ弁の開弁圧よりも低い燃料
タンク内圧弁の開弁圧とされる。According to a third aspect of the invention, in order to solve the above-mentioned problems, in the first aspect, the opening occurs when the pressure in the fuel tank exceeds a predetermined positive pressure higher than atmospheric pressure. It is equipped with a tank internal pressure control valve that feeds the fuel vapor in the fuel tank into the charcoal canister, and the pressure regulating valve device is higher than the atmospheric pressure when the pressure in the internal space becomes higher than a predetermined positive pressure. A positive pressure relief valve for opening the valve is provided, and the opening pressure of the positive pressure relief valve is set higher than the opening pressure of the tank internal pressure control valve. With this configuration, in the third aspect of the invention, the opening pressure of the fuel tank internal pressure valve is lower than the opening pressure of the positive pressure relief valve even if the pressure inside the fuel tank is the highest.
【０００８】また、４番目の発明によれば上記問題点を
解決するために１番目の発明において、燃料タンク内の
圧力が大気圧よりも低い予め定められた負圧よりも低く
なったときに開弁して燃料タンク内に外気を導入する外
気導入弁を具備し、調圧弁装置は内部空間内の圧力が大
気圧よりも低くなったときに開弁する大気圧リリーフ弁
を具備している。この様に構成することにより、４番目
の発明では燃料タンク収容容器内の内部空間の圧力は最
も低くてもほぼ大気圧とされる。従って燃料タンク内の
圧力は通常負圧にならないので、外気導入弁は通常閉弁
状態に保持される。According to a fourth aspect of the invention, in order to solve the above problems, in the first aspect, when the pressure in the fuel tank becomes lower than a predetermined negative pressure lower than atmospheric pressure. An external air introduction valve that opens and introduces external air into the fuel tank is provided, and the pressure regulating valve device includes an atmospheric pressure relief valve that opens when the pressure in the internal space becomes lower than atmospheric pressure. . With this configuration, in the fourth aspect of the invention, the pressure of the internal space in the fuel tank container is set to about atmospheric pressure even at the lowest. Therefore, the pressure in the fuel tank does not normally become a negative pressure, and the outside air introduction valve is normally kept closed.
【０００９】また、５番目の発明によれば上記問題点を
解決するために１番目の発明において、燃料タンク内へ
の燃料給油時に内部空間を外気に開放する外気開放弁を
具備している。この様に構成することにより、５番目の
発明では燃料給油時には外気開放弁が開弁するために燃
料タンク収容容器の内部空間内の圧力は大気圧となる。According to a fifth aspect of the invention, in order to solve the above problems, the first aspect of the invention is provided with an outside air release valve that opens the inside space to the outside air when fuel is refueled in the fuel tank. With this configuration, in the fifth aspect of the invention, the outside air release valve opens during fuel refueling, so that the pressure in the internal space of the fuel tank housing container becomes atmospheric pressure.
【００１０】また、６番目の発明によれば上記問題点を
解決するために１番目の発明において、前記調圧手段が
前記空間部圧力を検出する空間部圧力検出手段と、燃料
蒸気圧力を検出する燃料蒸気圧力検出手段と、前記空間
部圧力検出手段が検出した前記空間部圧力が前記燃料蒸
気圧力検出手段が検出した燃料蒸気圧力よりも高くなる
様に前記空間部の圧力を調整する加圧手段および大気圧
リリーフ弁を具備している。この様に構成することによ
り、６番目の発明では、常に前記空間部圧力は燃料蒸気
圧よりも高い圧力に保持される。According to a sixth aspect of the invention, in order to solve the above problems, in the first aspect of the invention, the pressure regulating means detects the space portion pressure detecting means for detecting the space portion pressure, and the fuel vapor pressure is detected. Fuel vapor pressure detecting means, and pressurizing for adjusting the pressure of the space portion such that the space portion pressure detected by the space portion pressure detecting means is higher than the fuel vapor pressure detected by the fuel vapor pressure detecting means. Means and an atmospheric pressure relief valve. With this configuration, in the sixth aspect, the space pressure is always maintained at a pressure higher than the fuel vapor pressure.
【００１１】[0011]
【発明の実施の形態】図１を参照すると、１は金属又は
合成樹脂材料からなる密封構造の燃料タンク、２は例え
ばゴムのような可撓性材料からなる袋状の伸縮膜３によ
り包囲された膨張収縮可能な燃料貯留部、４は燃料タン
ク１に密封的に固定されかつ燃料タンク１から外方に突
出する燃料注入管、５は燃料注入管４の先端部に着脱自
在に取付けられた燃料キャップ、６は燃料タンク１の上
壁面から燃料注入管４内の上方領域まで延びるブリーザ
パイプ、７は燃料貯留部２内の燃料を送り出すための燃
料ポンプ、８は燃料ポンプ７から送り出される燃料圧を
調整するためのプレッシャレギュレータを夫々示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, 1 is a fuel tank having a sealed structure made of metal or synthetic resin material, and 2 is surrounded by a bag-shaped stretchable membrane 3 made of a flexible material such as rubber. The expandable and contractible fuel storage part 4 is hermetically fixed to the fuel tank 1, and the fuel injection pipe 5 projecting outward from the fuel tank 1 is detachably attached to the tip of the fuel injection pipe 4. A fuel cap, 6 is a breather pipe extending from the upper wall surface of the fuel tank 1 to an upper region in the fuel injection pipe 4, 7 is a fuel pump for delivering the fuel in the fuel reservoir 2, and 8 is fuel delivered from the fuel pump 7. Pressure regulators for adjusting pressure are shown respectively.
【００１２】図１に示されるように燃料注入管４の下端
部は燃料貯留部２内に開口しており、伸縮膜３は燃料注
入管４の外周面上に密封的に固着される。また、燃料貯
留部２内で発生した燃料蒸気がブリーザパイプ６を介し
て燃料注入管４の上方領域内に送り込まれるように伸縮
膜３の上端部はブリーザパイプ６の下端開口部の周りに
おいて燃料タンク１の内周面上に密封的に固着されてい
る。また、伸縮膜３の下端部は燃料タンク１の底壁面上
に密封的に固着される。従って燃料貯留部２の内部は燃
料貯留部２周りの燃料タンク１内に形成される内部空間
９から伸縮膜３を介して完全に分離されている。As shown in FIG. 1, the lower end of the fuel injection pipe 4 is open in the fuel storage portion 2, and the stretch film 3 is hermetically fixed on the outer peripheral surface of the fuel injection pipe 4. In addition, the upper end of the stretchable membrane 3 is surrounded by the fuel around the lower end opening of the breather pipe 6 so that the fuel vapor generated in the fuel reservoir 2 is sent into the upper region of the fuel injection pipe 4 through the breather pipe 6. It is fixed to the inner peripheral surface of the tank 1 in a sealed manner. Further, the lower end portion of the stretch film 3 is hermetically fixed on the bottom wall surface of the fuel tank 1. Therefore, the inside of the fuel storage portion 2 is completely separated from the internal space 9 formed in the fuel tank 1 around the fuel storage portion 2 via the stretchable film 3.
【００１３】燃料注入管４は小径の上方部分４ａと大径
の下方部分４ｂからなり、燃料注入管４の大径下方部分
４ｂからはベーパ排出通路１０が上方に向けて延びてい
る。ベーパ排出通路１０と燃料注入管４の大径下方部分
４ｂと接続部には燃料がベーパ排出通路１０内に流入す
るのを阻止するためにフロート弁からなる過注入防止弁
１１が配置されている。この過注入防止弁１１は図１に
示すように通常開弁しているが燃料液面が過注入防止弁
１１の高さまで上昇したときに閉弁して燃料がベーパ排
出通路１０内に流入するのを阻止する。The fuel injection pipe 4 is composed of a small-diameter upper portion 4a and a large-diameter lower portion 4b, and a vapor discharge passage 10 extends upward from the large-diameter lower portion 4b of the fuel injection pipe 4. An over-injection prevention valve 11 made of a float valve is arranged at the connection between the vapor discharge passage 10 and the large-diameter lower portion 4b of the fuel injection pipe 4 to prevent fuel from flowing into the vapor discharge passage 10. . The over-injection prevention valve 11 is normally opened as shown in FIG. 1, but is closed when the fuel level rises to the height of the over-injection prevention valve 11, and the fuel flows into the vapor discharge passage 10. Prevent the.
【００１４】ベーパ排出通路１０は第１ベーパ排出通路
１０ａと第２ベーパ排出通路１０ｂとに分岐され、第１
ベーパ排出通路１０ａはタンク内圧制御弁１２を介し
て、第２ベーパ排出通路１０ｂはベーパ排出通路制御弁
１３を介してチャコールキャニスタ１４に接続される。
チャコールキャニスタ１４はその内部に活性炭層１５を
有し、この活性炭層１５内に吸着された燃料は予め定め
られた機関の運転状態のときに燃料蒸気パージ通路１６
を介して機関吸気通路（図示せず）内にパージされる。
タンク内圧制御弁１２は燃料貯留部２内の圧力と大気圧
との圧力差に応動して開閉するダイアフラム弁１２ａを
具備し、このタンク内圧制御弁１２は燃料貯留部２内の
圧力と大気圧との圧力差が予め定められた差圧を越えた
とき、即ち燃料貯留部２内の圧力が大気圧よりも高い予
め定められた正圧を越えたときに開弁する。The vapor discharge passage 10 is branched into a first vapor discharge passage 10a and a second vapor discharge passage 10b.
The vapor discharge passage 10 a is connected to the charcoal canister 14 via a tank internal pressure control valve 12, and the second vapor discharge passage 10 b is connected to a charcoal canister 14 via a vapor discharge passage control valve 13.
The charcoal canister 14 has an activated carbon layer 15 therein, and the fuel adsorbed in the activated carbon layer 15 has a fuel vapor purge passage 16 when the engine is operating in a predetermined state.
And is purged into the engine intake passage (not shown).
The tank internal pressure control valve 12 includes a diaphragm valve 12a that opens and closes in response to a pressure difference between the pressure inside the fuel storage portion 2 and the atmospheric pressure. The tank internal pressure control valve 12 includes the pressure inside the fuel storage portion 2 and the atmospheric pressure. The valve opens when the pressure difference between and exceeds a predetermined differential pressure, that is, when the pressure in the fuel storage section 2 exceeds a predetermined positive pressure higher than atmospheric pressure.
【００１５】一方、燃料注入管４の小径上方部分４ａ内
には給油ノズルを案内するためのベンチュリ状のガイド
部材１７が挿入されており、このベンチュリ状ガイド部
材１７の下端開口部にはピボットピン１８により回動可
能に支持されかつ通常ばね力によってガイド部材１７の
下端開口部を閉鎖している燃料蒸気流出遮断弁１９が配
置されている。また、このベンチュリ状ガイド部材１７
下方の燃料注入管４の小径上方部分４ａ内には給油ノズ
ル挿入時に給油ノズルの外周面と接触するシール部材２
０が配置されている。On the other hand, a venturi-shaped guide member 17 for guiding the refueling nozzle is inserted in the small-diameter upper portion 4a of the fuel injection pipe 4, and the pivot pin is provided at the lower end opening of the venturi-shaped guide member 17. A fuel vapor outflow shutoff valve 19 is arranged which is rotatably supported by 18 and which normally closes the lower end opening of the guide member 17 by a spring force. In addition, the venturi-shaped guide member 17
Inside the small diameter upper portion 4a of the lower fuel injection pipe 4, a seal member 2 that comes into contact with the outer peripheral surface of the fueling nozzle when the fueling nozzle is inserted
0 is arranged.
【００１６】ベーパ排出制御弁１３はダイアフラム弁１
３ａの一側にベンチュリ状ガイド部材１７上方の燃料注
入管４の小径上方部分４ａ内に連結された上方室１３ｂ
を具備し、ダイアフラム弁１３ａの他側に第２ベーパ排
出通路１０ｂを介して燃料貯留部２内に接続された下方
室１３ｃを具備する。このダイアフラム弁１３ａは上方
室１３ｂ内の圧力と下方室１３ｃ内の圧力との圧力差が
予め定められた差圧を越えたとき、即ち下方室１３ｃ内
の圧力が上方室１３ｂ内の圧力よりも一定圧だけ高くな
ったときに開弁する。なお、ベーパ排出制御弁１３が開
弁するときの上方室１３ｂ内と下方室１３ｃ内との圧力
差はタンク内圧制御弁１２が開弁するときの燃料貯留部
２内の圧力と大気圧との圧力差に比べてかなり小さい。The vapor discharge control valve 13 is the diaphragm valve 1.
An upper chamber 13b connected to the small-diameter upper portion 4a of the fuel injection pipe 4 above the venturi-shaped guide member 17 on one side of 3a.
And a lower chamber 13c connected to the other side of the diaphragm valve 13a inside the fuel storage portion 2 via the second vapor discharge passage 10b. The diaphragm valve 13a has a pressure difference between the pressure in the upper chamber 13b and the pressure in the lower chamber 13c that exceeds a predetermined pressure difference, that is, the pressure in the lower chamber 13c is higher than the pressure in the upper chamber 13b. The valve opens when the pressure rises by a certain amount. The pressure difference between the inside of the upper chamber 13b and the inside of the lower chamber 13c when the vapor discharge control valve 13 opens is the difference between the pressure inside the fuel reservoir 2 and the atmospheric pressure when the tank internal pressure control valve 12 opens. It is much smaller than the pressure difference.
【００１７】一方、燃料キャップ５内には燃料貯留部２
内の負圧が異常に高くなったときに開弁する外気導入弁
２１が配置されている。この外気導入弁２１は燃料貯留
部２内の圧力が大気圧よりも低い予め定められた負圧よ
りも低くなったときに開弁して外気を燃料貯留部２内に
導入させる。図１に示されるようにこの燃料キャップ５
は車両ボディの外側面上に形成された凹所２２内に配置
されており、この凹所２２はピボットピン２３により回
動可能に支持された給油扉２４によって通常覆われてい
る。この給油扉２４は車両運転席に設けられた給油扉オ
ープナ２５に連結され、給油扉オープナ２５を操作する
ことによって給油扉２４の開閉作用がおこなわれる。On the other hand, in the fuel cap 5, the fuel reservoir 2
An outside air introduction valve 21 that opens when the negative pressure inside becomes abnormally high is arranged. The outside air introduction valve 21 opens to introduce outside air into the fuel reservoir 2 when the pressure inside the fuel reservoir 2 becomes lower than a predetermined negative pressure lower than atmospheric pressure. As shown in FIG. 1, this fuel cap 5
Is located in a recess 22 formed on the outer surface of the vehicle body, which recess 22 is normally covered by a refueling door 24 pivotally supported by a pivot pin 23. The refueling door 24 is connected to a refueling door opener 25 provided in the vehicle driver's seat, and by operating the refueling door opener 25, the refueling door 24 is opened and closed.
【００１８】また、図１に示されるように燃料タンク１
の上壁面上には燃料タンク１内の内部空間９の圧力を制
御するための調圧装置２６が配置される。この調圧装置
２６は燃料タンク１内の内部空間９と外気との連通を制
御するために並列配置された三つの弁、即ち逆止弁から
なる正圧リリーフ弁２７と、逆止弁からなる大気圧リリ
ーフ弁２８と、電磁弁からなる外気開放弁２９とを具備
する。Further, as shown in FIG. 1, the fuel tank 1
A pressure adjusting device 26 for controlling the pressure of the internal space 9 in the fuel tank 1 is arranged on the upper wall surface. The pressure regulator 26 includes three valves arranged in parallel for controlling the communication between the internal space 9 in the fuel tank 1 and the outside air, that is, a positive pressure relief valve 27 including a check valve and a check valve. It is provided with an atmospheric pressure relief valve 28 and an outside air release valve 29 which is an electromagnetic valve.
【００１９】正圧リリーフ弁２７は燃料タンク１内の内
部空間９内の圧力が大気圧よりも高い予め定められた正
圧を越えたときに開弁する。この正圧リリーフ弁２７の
開弁圧はタンク内圧制御弁１２の開弁圧よりも大きく設
定されている。一方、大気圧リリーフ弁２８は燃料タン
ク１内の内部空間９内の圧力が大気圧よりも低くなると
ただちに開弁する。外気開放弁２９は給油扉オープナ２
５の操作に応動して制御され、給油扉２４を開くように
給油扉オープナ２５が操作された時に外気開放弁２９が
開弁せしめられる。従って、この外気開放弁２９は給油
時以外は閉弁状態に保持されている。この時、燃料タン
ク１内の内部空間９の圧力は正圧リリーフ弁２７および
大気圧リリーフ弁２８によってほぼ大気圧以上でありか
つ正圧リリーフ弁２７の開弁圧よりも低い圧力に保持さ
れることになる。なお、給油作業はエンジン停止中にお
こなわれるのが常であるので、エンジン停止中にも外気
開放弁２９を作動せしめることができる様に、外気開放
弁２９と給油扉オープナ２５はイグニッションスィッチ
がＯＦＦの状態でも作動するようにされている。The positive pressure relief valve 27 opens when the pressure in the internal space 9 in the fuel tank 1 exceeds a predetermined positive pressure higher than atmospheric pressure. The valve opening pressure of the positive pressure relief valve 27 is set higher than the valve opening pressure of the tank internal pressure control valve 12. On the other hand, the atmospheric pressure relief valve 28 opens immediately when the pressure in the internal space 9 in the fuel tank 1 becomes lower than atmospheric pressure. The outside air release valve 29 is the refueling door opener 2
5, the outside air release valve 29 is opened when the fuel supply door opener 25 is operated to open the fuel supply door 24. Therefore, the outside air release valve 29 is kept closed except when refueling. At this time, the pressure of the internal space 9 in the fuel tank 1 is maintained by the positive pressure relief valve 27 and the atmospheric pressure relief valve 28 at a pressure substantially higher than atmospheric pressure and lower than the opening pressure of the positive pressure relief valve 27. It will be. Since the refueling work is usually performed when the engine is stopped, the ignition switch of the outside air release valve 29 and the refueling door opener 25 is turned off so that the outside air release valve 29 can be operated even when the engine is stopped. It is designed to work in the state of.
【００２０】燃料貯留部２内の燃料が少なくなると燃料
貯留部２が収縮する。燃料を給油すべきときにはまず初
めに給油扉２４を開かせるべく給油扉オープナ２５が操
作される。給油扉オープナ２５が操作されると調圧装置
２６の外気開放弁２９が開弁せしめられ、斯くして燃料
タンク１内の内部空間９の圧力は大気圧となる。次いで
給油ノズルを燃料注入管４内に挿入するために燃料キャ
ップ５がはずされる。このときベンチュリ状ガイド部材
１７の下端開口部は燃料蒸気流出遮断弁１９により閉鎖
されており、従ってこのとき燃料貯留部２内の燃料蒸気
が外気中に放出されることがない。When the amount of fuel in the fuel storage portion 2 is low, the fuel storage portion 2 contracts. When fuel should be refueled, the refueling door opener 25 is first operated to open the refueling door 24. When the refueling door opener 25 is operated, the outside air release valve 29 of the pressure regulator 26 is opened, and thus the pressure of the internal space 9 in the fuel tank 1 becomes atmospheric pressure. The fuel cap 5 is then removed to insert the fueling nozzle into the fuel injection tube 4. At this time, the lower end opening of the venturi-shaped guide member 17 is closed by the fuel vapor outflow shutoff valve 19, so that the fuel vapor in the fuel storage portion 2 is not discharged into the outside air at this time.
【００２１】次いで、給油ノズルがガイド部材１７内に
挿入され、このとき給油ノズルの先端部でもって燃料蒸
気流出遮断弁１９が開弁せしめられる。次いで給油ノズ
ルの先端部が図１において鎖線３０で示されるようにシ
ール部材２０内に密封的に挿入され、次いで給油が開始
される。このように給油ノズルの先端部がシール部材２
０内に密封的に挿入されるので給油中に給油ノズルの周
りを通って空気が燃料貯留部２内の燃料内に混入する危
険性がない。Next, the refueling nozzle is inserted into the guide member 17, and at this time, the fuel vapor outflow shutoff valve 19 is opened by the tip of the refueling nozzle. Then, the tip of the oil supply nozzle is hermetically inserted into the seal member 20 as indicated by a chain line 30 in FIG. 1, and then oil supply is started. In this way, the tip of the refueling nozzle is the seal member
Since it is hermetically inserted into the fuel cell No. 0, there is no risk of air passing through the fueling nozzle and mixing with the fuel in the fuel reservoir 2 during refueling.
【００２２】給油が開始されると燃料貯留部２内の燃料
が増大するに従って燃料貯留部２が膨張する。このとき
外気開放弁２９が開弁しているので燃料貯留部２は自由
に膨張することができる。一方、給油が開始されると燃
料貯留部２内の圧力が上昇し、この上昇した圧力がベー
パ排出通路１０を介してタンク内圧制御弁１２およびベ
ーパ排出制御弁１３に作用する。このとき燃料貯留部２
内の圧力に対するベーパ排出制御弁１３の開弁圧はタン
ク内圧制御弁１３の開弁圧よりもかなり低いのでベーパ
排出制御弁１３が開弁し、その結果燃料貯留部２内に発
生した燃料蒸気は第２ベーパ排出通路１０ｂを介してチ
ャコールキャニスタ１４内に送り込まれる。When refueling is started, the fuel storage section 2 expands as the amount of fuel in the fuel storage section 2 increases. At this time, since the outside air release valve 29 is open, the fuel storage section 2 can freely expand. On the other hand, when refueling is started, the pressure in the fuel storage section 2 rises, and this raised pressure acts on the tank internal pressure control valve 12 and the vapor discharge control valve 13 via the vapor discharge passage 10. At this time, the fuel storage unit 2
Since the opening pressure of the vapor discharge control valve 13 with respect to the internal pressure is considerably lower than the opening pressure of the tank internal pressure control valve 13, the vapor discharge control valve 13 opens and, as a result, the fuel vapor generated in the fuel reservoir 2 is generated. Is sent into the charcoal canister 14 via the second vapor discharge passage 10b.
【００２３】給油が完了すると給油ノズルが引き抜か
れ、このとき再びガイド部材１７の下端開口部が燃料蒸
気流出遮断弁１９によって閉鎖される。次いで燃料キャ
ップ５が取付けられ、次いで給油扉オープナ２５を操作
することによって給油扉２４が閉じられる。このとき外
気開放弁２９が閉弁せしめられる。このとき燃料タンク
１内の内部空間９内の圧力は大気圧となっている。ま
た、燃料蒸気流出遮断弁１９には避けることのできない
わずかな漏れが存在するので燃料キャップ５が取付けら
れた後はベーパ排出制御弁１３の上方室１３ｂと下方室
１３ｃの圧力は通常ほぼ等しくなる。従って一旦燃料キ
ャップ５が取付けられるとベーパ排出制御弁１３は閉弁
状態に保持される。When refueling is completed, the refueling nozzle is pulled out, and at this time, the lower end opening of the guide member 17 is closed again by the fuel vapor outflow shutoff valve 19. Next, the fuel cap 5 is attached, and then the refueling door opener 25 is operated to close the refueling door 24. At this time, the outside air release valve 29 is closed. At this time, the pressure in the internal space 9 in the fuel tank 1 is atmospheric pressure. Also, since there is an inevitable slight leak in the fuel vapor outflow shutoff valve 19, the pressures in the upper chamber 13b and the lower chamber 13c of the vapor discharge control valve 13 are usually almost equal after the fuel cap 5 is attached. . Therefore, once the fuel cap 5 is attached, the vapor discharge control valve 13 is kept closed.
【００２４】機関の運転が開始されて燃料貯留部２内の
燃料が減少するとそれに伴なって燃料貯留部２は収縮す
る。燃料貯留部２が収縮すると燃料タンク１内の内部空
間９の圧力が低下するが内部空間９内の圧力が大気圧以
下になれば大気圧リリーフ弁２８が開弁するので内部空
間９内の圧力は大気圧以下に低下することはない。一
方、燃料貯留部２内の燃料温が上昇すると燃料貯留部２
内の圧力が上昇する。このとき燃料貯留部２内の圧力が
タンク内圧制御弁１２の開弁圧よりも高くなるとタンク
内圧制御弁１２が開弁し、斯くして燃料貯留部２内に発
生している燃料蒸気がベーパ排出通路１０および第１ベ
ーパ排出通路１０ａを介してチャコールキャニスタ１４
内に送り込まれる。次いでこの燃料蒸気は活性炭層１５
内の活性炭に吸着される。When the operation of the engine is started and the fuel in the fuel storage portion 2 decreases, the fuel storage portion 2 contracts accordingly. When the fuel storage portion 2 contracts, the pressure in the internal space 9 in the fuel tank 1 decreases, but when the pressure in the internal space 9 falls below atmospheric pressure, the atmospheric pressure relief valve 28 opens, so the pressure in the internal space 9 decreases. Does not drop below atmospheric pressure. On the other hand, when the fuel temperature in the fuel storage section 2 rises, the fuel storage section 2
The pressure inside rises. At this time, when the pressure in the fuel storage section 2 becomes higher than the valve opening pressure of the tank internal pressure control valve 12, the tank internal pressure control valve 12 opens and thus the fuel vapor generated in the fuel storage section 2 is vaporized. Charcoal canister 14 through discharge passage 10 and first vapor discharge passage 10a
Sent in. Next, this fuel vapor is activated carbon layer 15
Adsorbed on the activated carbon inside.
【００２５】一方、燃料貯留部２内の燃料温が高くなっ
て燃料貯留部２内の圧力が上昇すると燃料貯留部２が膨
張し、斯くして燃料タンク１内の内部空間９の圧力も上
昇する。即ち、図１に示される実施例では燃料貯留部２
内の圧力と燃料タンク１内の内部空間９内の圧力とは常
時ほぼ等しい圧力となるので燃料貯留部２内の圧力が上
昇すればそれに伴なって内部空間９内の圧力が上昇する
ことになる。この場合、前述したように正圧リリーフ弁
２７の開弁圧はタンク内圧制御弁１２の開弁圧よりも高
く、一方燃料貯留部２内の圧力は最大でタンク内圧制御
弁１２の開弁圧まで上昇するので内部空間９内の圧力も
最大でタンク内圧制御弁１２の開弁圧まで上昇すること
になる。On the other hand, when the fuel temperature in the fuel storage section 2 rises and the pressure in the fuel storage section 2 rises, the fuel storage section 2 expands, and thus the pressure in the internal space 9 in the fuel tank 1 also rises. To do. That is, in the embodiment shown in FIG. 1, the fuel storage unit 2
Since the internal pressure and the internal space 9 in the fuel tank 1 are always substantially equal to each other, if the pressure in the fuel reservoir 2 increases, the internal pressure in the internal space 9 will increase accordingly. Become. In this case, as described above, the valve opening pressure of the positive pressure relief valve 27 is higher than the valve opening pressure of the tank internal pressure control valve 12, while the pressure in the fuel reservoir 2 is maximum and the valve opening pressure of the tank internal pressure control valve 12 is maximum. Therefore, the pressure in the internal space 9 also rises to the valve opening pressure of the tank internal pressure control valve 12 at the maximum.
【００２６】このように内部空間９内の圧力は最大でタ
ンク内圧制御弁１２の開弁圧まで上昇し、また最も低下
したときでも大気圧となる。従って内部空間９内の圧力
は常時大気圧以上に保持されていることになる。ところ
で燃料貯留部２内に発生する燃料蒸気の量を少なくする
ためには燃料貯留部２内の燃料液面上に形成される空間
の容積、即ちそのときの温度に応じた飽和燃料蒸気で満
たされている燃料貯留部２内の空間の容積をできるだけ
少くすることが必要である。ところが図１に示される実
施例では燃料貯留部２の温度が上昇して燃料貯留部２が
膨張するとそれに伴なって内部空間９内の圧力が上昇す
る。その結果、燃料貯留部２の膨張作用が抑制され、即
ち燃料貯留部２はさほど膨張できなくなり、斯くして燃
料貯留部２内の燃料液面上に形成される空間の容積が増
大するのが抑制されることになる。従って燃料貯留部２
内に発生する燃料蒸気の量が減少せしめられ、斯くして
チャコールキャニスタ１４を小型化できることになる。As described above, the pressure in the internal space 9 rises up to the valve opening pressure of the tank internal pressure control valve 12, and becomes the atmospheric pressure even when the pressure drops most. Therefore, the pressure in the internal space 9 is always maintained at atmospheric pressure or higher. By the way, in order to reduce the amount of the fuel vapor generated in the fuel storage portion 2, the volume of the space formed on the liquid surface of the fuel in the fuel storage portion 2, that is, the saturated fuel vapor corresponding to the temperature at that time is filled. It is necessary to reduce the volume of the space inside the fuel storage portion 2 that is kept as small as possible. However, in the embodiment shown in FIG. 1, when the temperature of the fuel storage portion 2 rises and the fuel storage portion 2 expands, the pressure in the internal space 9 rises accordingly. As a result, the expansion action of the fuel storage part 2 is suppressed, that is, the fuel storage part 2 cannot expand so much, and thus the volume of the space formed on the fuel liquid level in the fuel storage part 2 increases. Will be suppressed. Therefore, the fuel storage unit 2
The amount of fuel vapor generated therein is reduced, and thus the charcoal canister 14 can be downsized.
【００２７】なお、上述したように内部空間９内の圧力
は最も低下したときでもほぼ大気圧であり、また燃料貯
留部２内の圧力は内部空間９の圧力とほぼ等しくなるの
で燃料貯留部２内の圧力は通常負圧になることはない。
従って燃料キャップ５に取付けられた外気導入弁２１が
開弁するのは何らかの理由でもって燃料貯留部２内に負
圧が発生する異常時である。また、燃料注入管４内に発
生する燃料蒸気の量を少なくするためには給油時に供給
される燃料流に対して抵抗とならない範囲内で燃料注入
管４の径をできるだけ小さくすることが好ましい。しか
しながら燃料注入管４の径を小さくしすぎると給油時に
燃料液面が過注入防止弁１１まで上昇する前に供給燃料
圧によって過注入防止弁１１が閉弁してします。そこで
このような過注入防止弁１１の閉弁作用を防止するため
に過注入防止弁１１の配置されている燃料注入管４の下
方部分４ｂは大きな径に形成されている。As described above, the pressure in the internal space 9 is almost atmospheric pressure even when the pressure is the lowest, and the pressure in the fuel storage part 2 is almost equal to the pressure in the internal space 9, so the fuel storage part 2 is the same. The internal pressure does not normally become a negative pressure.
Therefore, the outside air introduction valve 21 attached to the fuel cap 5 is opened at an abnormal time when a negative pressure is generated in the fuel storage portion 2 for some reason. Further, in order to reduce the amount of fuel vapor generated in the fuel injection pipe 4, it is preferable to make the diameter of the fuel injection pipe 4 as small as possible within a range that does not resist the fuel flow supplied at the time of refueling. However, if the diameter of the fuel injection pipe 4 is made too small, the overfilling prevention valve 11 will be closed by the supplied fuel pressure before the fuel level rises to the overfilling prevention valve 11 during refueling. Therefore, in order to prevent such a valve closing action of the over-injection prevention valve 11, the lower portion 4b of the fuel injection pipe 4 in which the over-injection prevention valve 11 is arranged is formed to have a large diameter.
【００２８】図２は本発明の第２の実施の形態を示し、
この第２の実施形態では、調圧装置として外気開放弁３
１とエアコンプレッサ３２が連結管３３を介して燃料タ
ンク１の上壁面上に取り付けられ、連結管３３の燃料タ
ンク１側の開口には袋状の伸縮膜３４が接続されてい
る。したがって、燃料注入管４から注入された燃料は直
接燃料タンク１に貯留せしめられる。なお、燃料ポンプ
７、プレッシャレギュレータ８は伸縮膜３４が燃料タン
ク１の内部で膨張、縮小するのを妨げない様に、例え
ば、図示される様に、燃料注入管４の内部に配設され
る。FIG. 2 shows a second embodiment of the present invention,
In the second embodiment, the outside air release valve 3 is used as a pressure regulator.
1 and an air compressor 32 are mounted on the upper wall surface of the fuel tank 1 via a connecting pipe 33, and a bag-shaped stretchable film 34 is connected to the opening of the connecting pipe 33 on the fuel tank 1 side. Therefore, the fuel injected from the fuel injection pipe 4 is directly stored in the fuel tank 1. The fuel pump 7 and the pressure regulator 8 are arranged, for example, inside the fuel injection pipe 4 as shown in the drawing so as not to prevent the expansion / contraction membrane 34 from expanding and contracting inside the fuel tank 1. .
【００２９】また、連結管３３には第１圧力センサ３５
が取り付けられ伸縮膜３４で覆われた空間部９の圧力を
検出し、ベーパ排出通路１０には第２圧力センサ３６が
取り付けられ燃料蒸気の圧力を検出し、検出された各圧
力信号をタンク圧調整リレー３７にむけて出力される。A first pressure sensor 35 is attached to the connecting pipe 33.
Is attached to the space 9 covered with the expansion / contraction film 34, the second pressure sensor 36 is attached to the vapor discharge passage 10 to detect the pressure of the fuel vapor, and the detected pressure signals are applied to the tank pressure. It is output to the adjustment relay 37.
【００３０】タンク圧調整リレー３７は簡単なマイクロ
コンピュータを備え、第１圧力センサ３５からの空間部
の圧力信号、第２圧力センサ３６からの燃料蒸気の圧力
信号が入力される他、給油扉オープナ２５からの給油扉
２４の開閉状態を示す信号が入力され、その結果に基づ
き、外気開放弁３１の開閉とエアコンプレッサ３２の駆
動を制御する信号を出力する。The tank pressure adjusting relay 37 is provided with a simple microcomputer, and receives the pressure signal of the space portion from the first pressure sensor 35 and the pressure signal of the fuel vapor from the second pressure sensor 36, as well as the refueling door opener. A signal indicating the open / closed state of the refueling door 24 from 25 is input, and based on the result, a signal for controlling the opening / closing of the outside air opening valve 31 and the driving of the air compressor 32 is output.
【００３１】例えば、給油扉オープナ２５から給油扉２
４が開状態であることを示す信号が入力された時にはタ
ンク圧調整リレー３７は外気開放弁３１を開弁する信号
を出力し、外気開放弁３１は開弁される。したがって、
燃料タンク１の内部に形成され伸縮膜３４によって覆わ
れる空間部の圧力は大気と同一の状態とされ、燃料注入
管４からのスムースな燃料の注入を可能ならしめる。給
油が終了して、給油扉２４が閉じられると給油オープナ
２５から給油扉２４が閉であるという信号が入力され、
それに応じてタンク圧調整リレー３７は外気開放弁３１
を閉弁する信号を出力し、外気開放弁３１は閉弁され
る。For example, from the refueling door opener 25 to the refueling door 2
When a signal indicating that 4 is in the open state is input, the tank pressure adjustment relay 37 outputs a signal to open the outside air release valve 31, and the outside air release valve 31 is opened. Therefore,
The pressure of the space formed inside the fuel tank 1 and covered by the stretch film 34 is set to the same state as that of the atmosphere, which enables smooth fuel injection from the fuel injection pipe 4. When refueling is completed and refueling door 24 is closed, a signal that refueling door 24 is closed is input from refueling opener 25,
In response to this, the tank pressure adjusting relay 37 is connected to the outside air release valve 31.
Is output, and the outside air release valve 31 is closed.
【００３２】タンク圧調整リレー３７は給油扉２４が開
いている時以外は、燃料蒸気の量が増大しない様に、第
１圧力センサ３５で示される空間部の圧力が、第２圧力
センサ３６で示される燃料蒸気の圧力よりも所定値だけ
大きくなる様にエアコンプレッサ３２あるいは、外気開
放弁３１を駆動するようにされていて、給油が終了し外
気開放弁３１が閉弁されると、タンク圧調整リレー３７
は第１圧力センサ３５の値が、第２圧力センサ３６の値
よりも所定値だけ大きくなるまでエアコンプレッサ３２
を駆動する信号を出力する。In the tank pressure adjusting relay 37, the pressure in the space indicated by the first pressure sensor 35 is adjusted by the second pressure sensor 36 so that the amount of fuel vapor does not increase except when the refueling door 24 is opened. When the air compressor 32 or the outside air release valve 31 is driven so that the pressure exceeds the pressure of the fuel vapor shown by a predetermined value, and the refueling is completed and the outside air release valve 31 is closed, the tank pressure is reduced. Adjustment relay 37
Until the value of the first pressure sensor 35 becomes larger than the value of the second pressure sensor 36 by a predetermined value.
Output a signal for driving.
【００３３】その後、例えば、エンジン停止のまま、高
温の大気中に車両が放置され、燃料蒸気の圧力が上昇し
た場合には、上昇した燃料蒸気の圧力よりも、所定値だ
け空間部の圧力が高くなるように、エアコンプレッサ３
２を駆動せしめ燃料蒸気の体積が膨張することを防止す
る。逆に、エンジンの運転により、あるいは、低温下に
放置することにより、燃料蒸気の圧力が減少した場合に
は、圧力差が所定の値になるようにするには空間部の圧
力を下げる必要があるのでタンク圧調整リレー３７は外
気開放弁３１を開弁する信号を出力する。Thereafter, for example, when the vehicle is left in a high temperature atmosphere while the engine is stopped and the pressure of the fuel vapor increases, the pressure in the space portion becomes a predetermined value higher than the pressure of the increased fuel vapor. Air compressor 3 to be higher
2 is driven to prevent the volume of fuel vapor from expanding. On the contrary, when the pressure of the fuel vapor decreases due to the operation of the engine or leaving it at a low temperature, it is necessary to lower the pressure in the space to bring the pressure difference to a predetermined value. Therefore, the tank pressure adjustment relay 37 outputs a signal for opening the outside air release valve 31.
【００３４】なお、第１の実施の形態においてチャコー
ルキャニスタ１４に一体的に取り付けられていたタンク
内圧制御弁１２は除去されているので、ベーパ排出制御
弁１３を介してのみチャコールキャニスタ１４内に送り
込まれるが、第１の実施の形態で説明した様に、ベーパ
排出制御弁１３が開弁するのは給油時のみであるので、
燃料蒸気は給油時にのみチャコールキャニスタ１４内に
送り込まれる。また、第２の実施の形態においても第１
の実施の形態と同様にタンク内圧制御弁１２を配設して
給油時以外においても燃料蒸気をチャコールキャニスタ
１４内に送り込むようにすることも可能である。逆に、
第１の実施形態おいて、第２の実施の形態の様にタンク
内圧制御弁１２を除去することもできる。Since the tank internal pressure control valve 12 that is integrally attached to the charcoal canister 14 in the first embodiment is removed, it is sent into the charcoal canister 14 only through the vapor discharge control valve 13. However, as described in the first embodiment, the vapor discharge control valve 13 opens only during refueling.
The fuel vapor is fed into the charcoal canister 14 only when refueling. Also, in the second embodiment, the first
It is also possible to arrange the tank internal pressure control valve 12 to send the fuel vapor into the charcoal canister 14 even when the fuel is not being refueled, as in the embodiment. vice versa,
In the first embodiment, the tank internal pressure control valve 12 can be removed as in the second embodiment.
【００３５】さらに、第２の実施の形態においては、空
間部を伸縮膜で包囲しているが、第１の実施の形態の様
に燃料貯留部の方を伸縮膜で包囲することも可能であ
り、逆に、第１の実施の形態において空間部を伸縮膜で
包囲することも可能である。Further, in the second embodiment, the space portion is surrounded by the stretch film, but it is also possible to surround the fuel storage portion by the stretch film as in the first embodiment. On the contrary, in the first embodiment, the space portion can be surrounded by the stretch film.
【００３６】[0036]
【発明の効果】燃料貯留部内で発生する燃料蒸気の量を
低減することができる。The amount of fuel vapor generated in the fuel storage section can be reduced.
【図１】本発明の燃料貯留装置の第１の実施の形態の全
体図である。FIG. 1 is an overall view of a first embodiment of a fuel storage device of the present invention.
【図２】本発明の燃料貯留装置の第２の実施の形態の全
体図である。FIG. 2 is an overall view of a second embodiment of the fuel storage device of the present invention.
１…燃料タンク ２…燃料貯留部 ３…伸縮膜 ４…燃料注入管 ５…燃料キャップ ６…ブリーザパイプ ７…燃料ポンプ ８…プレッシャレギュレータ ９…内部空間 １０…第１ベーパ排出通路 １１…過注入防止弁 １２…タンク内圧制御弁 １３…ベーパ排出通路制御弁 １４…チャコールキャニスタ １９…燃料蒸気流出防止弁 ２１…外気導入弁 ２６…調圧装置 ２７…正圧リリーフ弁 ２８…大気圧リリーフ弁 ２９…外気開放弁 ３１…外気開放弁 ３２…エアコンプレッサ ３４…伸縮膜 ３５…外気開放弁 ３６…タンク圧調整リレー DESCRIPTION OF SYMBOLS 1 ... Fuel tank 2 ... Fuel storage part 3 ... Expansion-contraction film 4 ... Fuel injection pipe 5 ... Fuel cap 6 ... Breather pipe 7 ... Fuel pump 8 ... Pressure regulator 9 ... Internal space 10 ... First vapor discharge passage 11 ... Over-injection prevention Valve 12 ... Tank internal pressure control valve 13 ... Vapor discharge passage control valve 14 ... Charcoal canister 19 ... Fuel vapor outflow prevention valve 21 ... Outside air introduction valve 26 ... Pressure regulator 27 ... Positive pressure relief valve 28 ... Atmospheric pressure relief valve 29 ... Outside air Release valve 31 ... Outside air release valve 32 ... Air compressor 34 ... Expansion film 35 ... Outside air release valve 36 ... Tank pressure adjustment relay
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６０Ｋ 15/03 15/077 Ｆ０２Ｍ 37/12 Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B60K 15/03 15/077 F02M 37/12 F
Claims (6)
入された燃料が貯留されて形成される燃料貯留部と、該
燃料貯留部と燃料タンク内壁の間に形成される空間部の
いずれか一方を可撓性材料からなる袋状の伸縮膜で包囲
して互いに分離せしめ、 前記空間部に前記空間部の圧力を大気圧よりも高い圧力
に保持可能な調圧手段を接続したことを特徴とする車両
用燃料貯留装置。1. A fuel storage part formed by storing fuel injected from a fuel injection pipe in a fuel tank, and a space part formed between the fuel storage part and an inner wall of the fuel tank. It is characterized in that it is surrounded by a bag-shaped stretchable film made of a flexible material and separated from each other, and a pressure adjusting means capable of holding the pressure of the space portion at a pressure higher than atmospheric pressure is connected to the space portion. Vehicle fuel storage device.
圧よりも高い予め定められた正圧よりも高くなった時、
または、前記空間部の圧力が大気圧よりも低くなったと
きに開弁することを特徴とする請求項１に記載の車両用
燃料貯留装置。2. The pressure adjusting means, when the pressure of the space portion becomes higher than a predetermined positive pressure higher than atmospheric pressure,
Alternatively, the fuel storage device for a vehicle according to claim 1, wherein the valve is opened when the pressure in the space becomes lower than the atmospheric pressure.
め定められた正圧を越えたときに開弁して燃料貯留部の
燃料蒸気をチャコールキャニスタ内に送り込む燃料蒸気
圧制御弁を具備し、 前記調圧手段が上記空間部の圧力が大気圧よりも高い予
め定められた正圧よりも高くなったときに開弁する正圧
リリーフ弁を具備し、 該正圧リリーフ弁の開弁圧が前記燃料蒸気圧制御弁の開
弁圧よりも高く設定されている請求項１に記載の車両用
燃料貯留装置。3. A fuel vapor pressure control valve that opens when the pressure in the fuel reservoir exceeds a predetermined positive pressure that is higher than atmospheric pressure and sends the fuel vapor in the fuel reservoir into the charcoal canister. However, the pressure adjusting means includes a positive pressure relief valve that opens when the pressure in the space becomes higher than a predetermined positive pressure higher than atmospheric pressure, and the positive pressure relief valve is opened. The fuel storage device for a vehicle according to claim 1, wherein a pressure is set higher than a valve opening pressure of the fuel vapor pressure control valve.
め定められた負圧よりも低くなったときに開弁して燃料
貯留部に外気を導入する外気導入弁を具備し、前記調圧
手段は上記空間部の圧力が大気圧よりも低くなった時に
開弁する大気圧リリーフ弁を具備している請求項１に記
載の車両用燃料貯留装置。4. An outside air introduction valve that opens when the pressure in the fuel storage section becomes lower than a predetermined negative pressure lower than atmospheric pressure to introduce outside air into the fuel storage section. 2. The vehicle fuel storage device according to claim 1, wherein the pressure means includes an atmospheric pressure relief valve that opens when the pressure in the space becomes lower than atmospheric pressure.
開放する外気開放弁を具備した請求項１に記載の車両用
燃料貯留装置。5. The fuel storage device for a vehicle according to claim 1, further comprising an outside air release valve that opens the space portion to the outside air when fuel is supplied.
る空間部圧力検出手段と、燃料蒸気圧力を検出する燃料
蒸気圧力検出手段と、前記空間部圧力検出手段が検出し
た前記空間部圧力が前記燃料蒸気圧力検出手段が検出し
た燃料蒸気圧力よりも高くなる様に前記空間部の圧力を
調整する加圧手段および大気圧リリーフ弁を具備するこ
とを特徴とする請求項１に記載の車両用燃料貯留装置。6. The space pressure detection means for detecting the space pressure by the pressure adjusting means, the fuel vapor pressure detection means for detecting the fuel vapor pressure, and the space pressure detected by the space pressure detection means. 2. The vehicle according to claim 1, further comprising a pressurizing unit and an atmospheric pressure relief valve for adjusting the pressure of the space so that the pressure becomes higher than the fuel vapor pressure detected by the fuel vapor pressure detecting unit. Fuel storage device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23124295A JP3518087B2 (en) | 1994-10-21 | 1995-09-08 | Vehicle fuel storage device |
| US08/545,066 US5596971A (en) | 1994-10-21 | 1995-10-19 | Fuel storing device for motor vehicle |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-256813 | 1994-10-21 | ||
| JP25681394 | 1994-10-21 | ||
| JP23124295A JP3518087B2 (en) | 1994-10-21 | 1995-09-08 | Vehicle fuel storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08170568A true JPH08170568A (en) | 1996-07-02 |
| JP3518087B2 JP3518087B2 (en) | 2004-04-12 |
Family
ID=26529768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23124295A Expired - Fee Related JP3518087B2 (en) | 1994-10-21 | 1995-09-08 | Vehicle fuel storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3518087B2 (en) |
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| EP0940285A2 (en) | 1998-03-05 | 1999-09-08 | Toyota Jidosha Kabushiki Kaisha | A fuel tank |
| WO1999048718A1 (en) * | 1998-03-26 | 1999-09-30 | Toyota Jidosha Kabushiki Kaisha | Fuel reservoir |
| US5979417A (en) * | 1997-04-30 | 1999-11-09 | Toyota Jidosha Kabushiki Kaisha | Fuel reserving device |
| EP0982169A2 (en) | 1998-08-21 | 2000-03-01 | Toyota Jidosha Kabushiki Kaisha | Fuel tank and vehicle equipped with the same |
| EP0945298A3 (en) * | 1998-03-23 | 2000-11-08 | Toyota Jidosha Kabushiki Kaisha | Fuel tank |
| US6240908B1 (en) | 1998-06-22 | 2001-06-05 | Toyota Jidosha Kabushiki Kaisha | Fuel storage device diagnostic apparatus |
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| US5979417A (en) * | 1997-04-30 | 1999-11-09 | Toyota Jidosha Kabushiki Kaisha | Fuel reserving device |
| EP0940285A2 (en) | 1998-03-05 | 1999-09-08 | Toyota Jidosha Kabushiki Kaisha | A fuel tank |
| EP0940285A3 (en) * | 1998-03-05 | 2000-11-08 | Toyota Jidosha Kabushiki Kaisha | A fuel tank |
| EP0945298A3 (en) * | 1998-03-23 | 2000-11-08 | Toyota Jidosha Kabushiki Kaisha | Fuel tank |
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| JP2007022317A (en) * | 2005-07-15 | 2007-02-01 | Nissan Motor Co Ltd | Fuel storage apparatus |
| JP2013095338A (en) * | 2011-11-02 | 2013-05-20 | Toyota Motor Corp | Fuel tank structure |
| US9834089B2 (en) | 2015-06-12 | 2017-12-05 | Toyota Jidosha Kabushiki Kaisha | Fuel tank structure |
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