JP2009078648A - Fuel vapor outflow device - Google Patents

Fuel vapor outflow device Download PDF

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JP2009078648A
JP2009078648A JP2007248506A JP2007248506A JP2009078648A JP 2009078648 A JP2009078648 A JP 2009078648A JP 2007248506 A JP2007248506 A JP 2007248506A JP 2007248506 A JP2007248506 A JP 2007248506A JP 2009078648 A JP2009078648 A JP 2009078648A
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fuel
fuel vapor
vapor
gas
tank
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Norihiro Yamada
憲弘 山田
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance effect of suppressing fuel leakage when letting fuel vapor remaining in an upper end area inside a fuel tank outflow to the outside of a tank via a gas-liquid separator. <P>SOLUTION: An end-part duct part 50 is fitted/mounted with a fuel shielding body 52 composed of U-shaped left/right bodies 52L, 52R mutually joined/fixed at their end faces. Shielding plates 54L, 54R are projected obliquely upward from lower sides of penetration holes 53 continuing to penetration holes 51 as basic points. These shielding plates are vertically/alternately provided along a duct direction of the end-part duct part 50. The shielding plates 54L, 54R form fuel storage parts 55 at front areas of the penetration holes 53. The fuel entering the end-part duct part 50 is stored in the fuel storage parts 55, and only extra fuel exceeding the storage amount passes. The fuel vapor reaches the gas-liquid separator via vapor flow passages 56 between the shielding plates without any problem. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、燃料タンクの内部上端領域に滞留した燃料蒸気を気液分離機を経由してタンク外に流出する燃料蒸気流出装置に関する。   The present invention relates to a fuel vapor outflow device that causes fuel vapor staying in an upper end region inside a fuel tank to flow out of the tank via a gas-liquid separator.

燃料タンクに燃料を貯めるに当たっては、タンク内全てを燃料で満たすことが望ましい。ところで、燃料液位より上のタンク内に貯まった燃料蒸気は、適宜、タンク外へ排出することが必要とされ、燃料蒸気排出のための弁にはフロート弁が多用されていた。こうしたフロート弁では、満タン液位においてもフロートの浮沈ストロークを確保する必要があるので、タンクの内部上端には、いわゆるデットスペースがあった。こうしたデットスペースの削減のため、種々の技術が提案されている(例えば、特許文献1)。   When storing fuel in the fuel tank, it is desirable to fill the entire tank with fuel. By the way, the fuel vapor stored in the tank above the fuel level must be appropriately discharged out of the tank, and a float valve is frequently used as a valve for discharging the fuel vapor. In such a float valve, since it is necessary to ensure the float stroke of the float even at the full liquid level, there is a so-called dead space at the upper end inside the tank. Various techniques have been proposed to reduce such dead space (for example, Patent Document 1).

特開2003−286918号公報JP 2003-286918 A

この特許文献では、タンク内に設けた管路の開口をタンク内部の上端側に位置させ、当該開口から管路に入り込んだ燃料蒸気をタンク外に排出している。つまり、管路に弁を設けないようにすることで、開口、即ち管路端部をタンク内部の上端に近づけることで、デットスペースを削減している。   In this patent document, the opening of a pipeline provided in the tank is positioned on the upper end side inside the tank, and the fuel vapor that has entered the pipeline from the opening is discharged out of the tank. In other words, by not providing a valve in the pipe line, the dead space is reduced by bringing the opening, that is, the pipe end part closer to the upper end inside the tank.

この特許文献で提案された技術では、車両の走行時における燃料液面の傾斜等により、燃料蒸気と一緒に燃料自体も開口に入り込んで管路を流れることになる。こうして管路を流れる燃料蒸気と燃料は、管路末端のセパレータにて気液分離されて、その気体成分である燃料蒸気がタンク外に排出されている。このため、燃料液面の傾斜や上下動が頻繁となると、セパレータに達する燃料の量も増える分だけ、セパレータ下流への燃料の漏れが起き易くなると指摘されるに至った。   In the technique proposed in this patent document, the fuel itself enters the opening together with the fuel vapor and flows through the pipeline due to the inclination of the fuel level when the vehicle travels. In this way, the fuel vapor and the fuel flowing through the pipeline are separated into gas and liquid by the separator at the end of the pipeline, and the fuel vapor as the gas component is discharged out of the tank. For this reason, it has been pointed out that when the fuel surface is inclined or moved up and down frequently, the amount of fuel that reaches the separator increases, and fuel leaks more easily downstream of the separator.

本発明は、上記した課題を踏まえ、燃料タンクの内部上端領域に滞留した燃料蒸気を気液分離機を経由してタンク外に流出するに際しての燃料漏れの抑制効果を高めることをその目的とする。   In view of the above-described problems, an object of the present invention is to improve the effect of suppressing fuel leakage when fuel vapor staying in the upper end region inside a fuel tank flows out of the tank via a gas-liquid separator. .

上記した目的の少なくとも一部を達成するために、本発明では、以下の構成を採用した。   In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[適用:燃料蒸気流出装置]
燃料タンクの内部上端領域に滞留した燃料蒸気を気液分離機を経由してタンク外に流出する燃料蒸気流出装置であって、
前記滞留した燃料蒸気を前記気液分離機に導入するようタンク内に配置された蒸気導入管路を備え、
該蒸気導入管路は、
前記内部上端領域に蒸気流入開口を含む端部管路部を位置させ、該端部管路部において、前記蒸気流入開口から管路に入り込んだ液相の燃料を管路内に貯め置きつつ、前記蒸気流入開口から管路に入り込んだ気相の燃料蒸気については管路を通過させる燃料遮蔽機構と、
該燃料遮蔽機構により前記端部管路部の管路内に貯め置かれた燃料を燃料タンク内に排出する排出路とを有する
ことを要旨とする。
[Application: Fuel vapor spill device]
A fuel vapor outflow device for flowing out fuel vapor staying in the upper end region inside the fuel tank to the outside of the tank via a gas-liquid separator,
A steam introduction line arranged in a tank to introduce the staying fuel vapor into the gas-liquid separator;
The steam inlet line is
An end pipe section including a steam inflow opening is positioned in the inner upper end region, and in the end pipe section, while storing liquid-phase fuel that has entered the pipe from the steam inflow opening in the pipe, A fuel shielding mechanism for allowing vapor phase fuel vapor entering the pipeline from the vapor inlet opening to pass through the pipeline;
A gist of the invention is that the fuel shielding mechanism has a discharge passage for discharging the fuel stored in the pipe of the end pipe section into the fuel tank.

上記構成の燃料蒸気流出装置は、タンク内に配設した蒸気導入管路の端部管路部を燃料タンクの内部上端領域に位置させ、当該管路部の蒸気流入開口からタンク内部上端領域の燃料蒸気を気液分離機に導入する。燃料タンク内の燃料液面が傾斜等すると、燃料蒸気と一緒に燃料自体も蒸気流入開口から蒸気導入管路を流れるが、こうして流れ込んだ燃料は、蒸気導入管路が端部管路部に有する燃料遮蔽機構により、管路内に貯め置かれ、燃料蒸気は端部管路部、およびその下流の管路を気液分離機まで達する。燃料蒸気と一緒に蒸気導入管路に流れ込んだ燃料にあっても、端部管路部の管路内に貯め置かれた分を超えると端部管路部を経て気液分離機まで達するが、その量は、燃料遮蔽機構により端部管路部の管路内に貯め置かれる分だけ少量となる。よって、気液分離機に達する燃料量を低減できるので、気液分離機の下流への燃料の漏れを起き難くでき、タンク外部への燃料漏洩の抑制効果は高まる。しかも、端部管路部の管路内に貯め置かれた燃料は、排出路により燃料タンク内に排出されてタンク内に戻るので、気液分離機まで達する燃料量をより少量とできることから、燃料漏洩の抑制効果はより高まる。この場合、排出路を、燃料遮蔽機構が燃料蒸気を通過させる蒸気流路よりも下方に配設することで、貯め置かれた燃料のタンク内への戻りが確実となり、好ましい。なお、蒸気導入管路の端部管路部は燃料タンクの内部上端領域に位置するので、燃料タンクにおけるデッドスペースは削減される。   In the fuel vapor outflow device having the above-described configuration, the end pipe line portion of the steam introduction pipe line arranged in the tank is positioned in the upper end area inside the fuel tank, and the vapor inflow opening of the pipe line section extends from the upper end area inside the tank. Fuel vapor is introduced into the gas-liquid separator. When the fuel level in the fuel tank is inclined, etc., the fuel itself and the fuel vapor flow through the steam inlet pipe from the steam inlet opening. The fuel introduced in this way has the steam inlet pipe in the end pipe section. By the fuel shielding mechanism, it is stored in the pipeline, and the fuel vapor reaches the gas-liquid separator through the end pipeline section and the downstream pipeline. Even in the fuel that flows into the steam introduction pipe along with the fuel vapor, if it exceeds the amount stored in the pipe of the end pipe section, it will reach the gas-liquid separator via the end pipe section. The amount is reduced by the amount stored in the pipe of the end pipe by the fuel shielding mechanism. Therefore, since the amount of fuel reaching the gas-liquid separator can be reduced, it is difficult for fuel to leak downstream from the gas-liquid separator, and the effect of suppressing fuel leakage to the outside of the tank is enhanced. Moreover, since the fuel stored in the pipe line of the end pipe part is discharged into the fuel tank by the discharge path and returns to the tank, the amount of fuel reaching the gas-liquid separator can be made smaller. The effect of suppressing fuel leakage is further increased. In this case, it is preferable that the discharge path is disposed below the vapor flow path through which the fuel shielding mechanism allows the fuel vapor to pass, so that the stored fuel can be reliably returned to the tank. In addition, since the end pipe line part of the steam introduction pipe line is located in the internal upper end region of the fuel tank, the dead space in the fuel tank is reduced.

上記した燃料蒸気流出装置は、次のような態様とすることができる。例えば、燃料遮蔽機構が燃料蒸気を通過させる蒸気流路を、直径で1.5〜3mmの管状の流路面積に相当する流路面積となるようにすることができる。こうすれば、気相の燃料蒸気の通過は確実とできる反面、液相の燃料については蒸気流路の通過に制約を受けるので、気液分離機まで達する燃料量低減の信頼性が高まる。   The fuel vapor outflow device described above can be configured as follows. For example, the steam passage through which the fuel shielding mechanism allows the fuel vapor to pass can be made to have a passage area corresponding to a tubular passage area having a diameter of 1.5 to 3 mm. In this way, the vapor-phase fuel vapor can be surely passed, but the liquid-phase fuel is restricted by the passage of the vapor flow path, so the reliability of reducing the amount of fuel reaching the gas-liquid separator is increased.

また、前記気液分離機を燃料タンク内に備えるようにした上で、前記気液分離器にて分離された気相の燃料蒸気を、蒸気流出管路により前記気液分離器から燃料タンク外に流出させ、前記気液分離器にて分離された液相の燃料を、燃料排出系により前記気液分離器から前記燃料タンクに排出するようにすることもできる。こうすれば、燃料漏洩の抑制効果を高めた燃料タンクを提供できる。   In addition, the gas-liquid separator is provided in the fuel tank, and the vapor-phase fuel vapor separated by the gas-liquid separator is separated from the gas-liquid separator to the outside of the fuel tank by a vapor outlet line. The liquid fuel separated and separated by the gas-liquid separator can be discharged from the gas-liquid separator to the fuel tank by a fuel discharge system. By so doing, it is possible to provide a fuel tank with an improved fuel leakage suppression effect.

また、前記燃料遮蔽機構として、前記端部管路部の管路を斜めに遮るよう斜め上方に向けて突出した板状の遮蔽体を備えるものとし、該遮蔽体により燃料の流れを遮りつつ前記遮蔽体の上に燃料を貯め置くと共に、少なくとも2枚以上の前記遮蔽体を組み合わせて屈曲流路を形成し、該屈曲流路にて前記燃料蒸気を通過させるようにできる。例えば、前記遮蔽体を前記端部管路部の管路方向に沿って上下に隔離しつつ交互に設置するようにできる。こうすれば、交互に設置された一方の前記遮蔽体の下面と前記交互に配置された他方の前記遮蔽体の先端との間隙を燃料蒸気の通過箇所としつつ、当該通過箇所で流路が屈曲した屈曲流路にて燃料蒸気を通過させることができる。よって、斜め上方に突出した遮蔽体の上下・交互配置という簡便な構成で、燃料漏洩の高い抑制効果を達成できる。   Further, the fuel shielding mechanism includes a plate-like shield projecting obliquely upward so as to obliquely block the pipe line of the end pipe portion, and the fuel flow is blocked by the shield while blocking the fuel flow. The fuel can be stored on the shield, and at least two or more of the shields can be combined to form a bent channel, and the fuel vapor can pass through the bent channel. For example, the shields can be alternately installed while being vertically separated along the pipe line direction of the end pipe line part. In this way, the flow path bends at the passage location while the gap between the lower surface of one of the alternately installed shields and the tip of the other shield member arranged alternately is the passage location of the fuel vapor. The fuel vapor can be passed through the bent channel. Therefore, it is possible to achieve a high fuel leakage suppressing effect with a simple configuration in which the shielding bodies projecting obliquely upward are arranged vertically and alternately.

この他の前記燃料遮蔽機構として、前記端部管路部の管路を斜めに遮る板状の遮蔽体を、該遮蔽体が有する開口が重なり合うことなく前記端部管路部の管路方向に沿って多段に配設するようにできる。こうすれば、それぞれの遮蔽体が斜めであることから遮蔽体自体で燃料の流れを遮りつつ遮蔽体の下端側に燃料を貯め置き、それぞれの遮蔽体の開口を燃料蒸気の通過箇所としつつ、当該開口で流路が屈曲した屈曲流路にて燃料蒸気を通過させることができる。よって、開口を有する遮蔽体を端部管路部の管路を斜めに遮るよう多段に配置するという簡便な構成で、燃料漏洩の高い抑制効果を達成できる。   As another fuel shielding mechanism, a plate-like shield that obliquely blocks the pipe of the end pipe section is provided in the pipe direction of the end pipe section without overlapping the openings of the shield. It can be arranged in multiple stages along. In this way, since each shield is oblique, fuel is stored at the lower end side of the shield while blocking the flow of fuel with the shield itself, and the opening of each shield is used as a passage for fuel vapor, The fuel vapor can be passed through a bent flow path in which the flow path is bent at the opening. Therefore, it is possible to achieve a high fuel leakage suppressing effect with a simple configuration in which the shielding body having the opening is arranged in multiple stages so as to obliquely block the pipe line of the end pipe line part.

また別の前記燃料遮蔽機構として、笠状をなして笠頂上部に開口を有する遮蔽体を複数備え、該複数の前記遮蔽体を前記開口が重なり合うことなく前記端部管路部の管路方向に沿って上下に配設するようにできる。こうすれば、それぞれの前記遮蔽体の笠斜面で燃料の流れを遮りつつ前記遮蔽体の笠周縁側に燃料を貯め置き、前記開口を燃料蒸気の通過箇所とできる。よって、頂上部に開口を有する笠状の遮蔽体を開口が重ならないように上下に配設するという簡便な構成で、燃料漏洩の高い抑制効果を達成できる。   Further, as another fuel shielding mechanism, a plurality of shielding bodies having a cap shape and having an opening at the top of the top of the cap are provided, and the plurality of the shielding bodies are arranged in the pipe direction of the end pipe section without overlapping the openings. It can be arranged vertically. If it carries out like this, fuel will be stored on the shade peripheral side of the said shielding body, blocking the fuel flow with the shade slope of each said shielding body, and the said opening can be made into the passage location of fuel vapor | steam. Therefore, it is possible to achieve a high fuel leakage suppression effect with a simple configuration in which the cap-shaped shield having an opening at the top is arranged vertically so that the openings do not overlap.

こうした遮蔽体を用いて燃料遮蔽機構の機能を達成するに当たり、前記遮蔽体を有する前記燃料遮蔽機構を前記端部管路部とは別体に備え、該別体の前記燃料遮蔽機構を前記端部管路部の管路に挿入するようにできる。こうすれば、燃料遮蔽機構の挿入という簡便な手法で、燃料漏洩の抑制効果が高い燃料蒸気流出装置を得ることができる。換言すれば、既存の燃料蒸気流出装置における蒸気導入管路に燃料遮蔽機構を挿入するという簡便な手法で、燃料漏洩の抑制効果が高い燃料蒸気流出装置に改造することができる。   In achieving the function of the fuel shielding mechanism using such a shielding body, the fuel shielding mechanism having the shielding body is provided separately from the end pipe line portion, and the separate fuel shielding mechanism is provided at the end. It can be inserted into the pipe line of the part pipe line part. In this way, a fuel vapor outflow device having a high effect of suppressing fuel leakage can be obtained by a simple method of inserting a fuel shielding mechanism. In other words, it can be modified to a fuel vapor outflow device having a high effect of suppressing fuel leakage by a simple method of inserting a fuel shielding mechanism into a vapor introduction pipe line in an existing fuel vapor outflow device.

以下、本発明の実施の形態を実施例に基づいて説明する。図1は本発明の実施例としての燃料蒸気流出装置10の構成を模式的に説明する説明図、図2は図1において符号Aを付した燃料蒸気流出装置10の要部を断面視して示す説明図である。   Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is an explanatory view for schematically explaining the configuration of a fuel vapor outflow device 10 as an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part of the fuel vapor outflow device 10 denoted by reference numeral A in FIG. It is explanatory drawing shown.

図示するように、燃料蒸気流出装置10は、燃料タンクTの内部に組み込まれ、気液分離ユニット20とポンプ30とを備える。気液分離ユニット20は、図示しないプレートを備え、当該プレートに、気液分離機22と蒸気遮断弁24と管路開閉弁26と逆止弁28とを装着固定したアッシー品である。気液分離機22は、後述の蒸気導入管路40を通過して気液分離機22に達した燃料蒸気と燃料の導入を受け、気体成分としての燃料蒸気と液体成分としての燃料とを分離(気液分離)する。そして、この気液分離機22は、気液分離した燃料蒸気をタンク外のキャニスタCに至る蒸気排出管路23に流出させ、気液分離した燃料をポンプ30に至る排出管路31から流出可能とする。   As shown in the figure, the fuel vapor outflow device 10 is incorporated in a fuel tank T and includes a gas-liquid separation unit 20 and a pump 30. The gas-liquid separation unit 20 includes an unillustrated plate, and is an assembly product in which a gas-liquid separator 22, a steam cutoff valve 24, a pipe opening / closing valve 26, and a check valve 28 are attached and fixed to the plate. The gas-liquid separator 22 receives the introduction of fuel vapor and fuel that have passed through a vapor introduction pipe 40 described later and reached the gas-liquid separator 22, and separates the fuel vapor as a gas component and the fuel as a liquid component. (Gas-liquid separation). The gas-liquid separator 22 can cause the fuel vapor separated from the gas and liquid to flow out to the vapor discharge line 23 leading to the canister C outside the tank, and the fuel separated into gas and liquid can flow out from the discharge line 31 leading to the pump 30. And

気液分離機22から蒸気排出管路23に流出された燃料蒸気は、当該管路の蒸気遮断弁24と管路開閉弁26の弁動作を経てキャニスタCに達し、キャニスタCにて燃料成分の吸着を受けた後、大気に放出される。蒸気遮断弁24は、燃料液位に応じて浮沈するフロートを用いたフロート弁構成を備え、タンク内の燃料液位が高くなると閉弁して蒸気排出管路23の管路を閉じる。管路開閉弁26は、燃料液位に応じて浮沈するフロートを用いたフロート弁構成と圧力に応じて開閉するリリーフ弁構成を備え、タンク内の燃料液位上昇時の閉弁による管路閉鎖と、タンク内圧上昇時の管路開放とを行う。気液分離機22にて気液分離された燃料は、ポンプ30による吸引を受けて排出管路31を通過し、ポンプ排出ポート32を経てタンク内に戻される。この場合、排出管路31の逆止弁28により、気液分離機22の側へは燃料が流れ込まないようにされている。   The fuel vapor that has flowed out of the gas-liquid separator 22 into the steam discharge pipe 23 reaches the canister C through the valve operation of the steam cutoff valve 24 and the pipe opening / closing valve 26 of the pipe, and the canister C After being absorbed, it is released to the atmosphere. The steam shut-off valve 24 has a float valve configuration using a float that floats according to the fuel liquid level, and closes when the fuel liquid level in the tank becomes high to close the pipe of the steam discharge pipe 23. The pipe opening / closing valve 26 has a float valve structure using a float that floats and sinks according to the fuel liquid level and a relief valve structure that opens and closes according to the pressure. And opening the pipeline when the tank internal pressure rises. The fuel gas-liquid separated by the gas-liquid separator 22 is sucked by the pump 30, passes through the discharge pipe 31, and returns to the tank through the pump discharge port 32. In this case, the check valve 28 in the discharge pipe 31 prevents the fuel from flowing into the gas-liquid separator 22 side.

この他、本実施例の燃料蒸気流出装置10は、気液分離機22への蒸気導入のための蒸気導入管路40をタンク上端側に2系統備え、それぞれの系統の蒸気導入管路40は、燃料タンクTの内部の上端領域に配設され、管路先端の端部管路部50を図1における燃料タンクTの端部側に配置させている。図2に詳しく示すように、端部管路部50は、蒸気流入開口50aが燃料タンクTのタンク上端側内壁TSに対向するよう位置する。本実施例では蒸気導入管路40の配設位置を燃料タンクTにおける満水液位FLより低くしたことから、この蒸気導入管路40は、タンク内部の上端領域に滞留した燃料蒸気を端部管路部50の蒸気流入開口50aから取り込んで気液分離機22に導入する。この場合、気液分離機22への燃料蒸気導入は、タンク内圧の上昇に伴って起き、その際に燃料液位が傾斜等すると、タンク内の燃料も燃料蒸気と一緒に蒸気流入開口50aに流入し、端部管路部50および蒸気導入管路40を経て気液分離機22に達する。なお、端部管路部50における燃料および燃料蒸気の通過挙動については後述する。   In addition, the fuel vapor outflow device 10 of this embodiment includes two systems of steam introduction pipes 40 for introducing steam into the gas-liquid separator 22 on the upper end side of the tank. 1 is disposed in the upper end region inside the fuel tank T, and the end pipe section 50 at the front end of the pipe is disposed on the end side of the fuel tank T in FIG. As shown in detail in FIG. 2, the end pipe portion 50 is positioned such that the steam inflow opening 50 a faces the tank upper end side inner wall TS of the fuel tank T. In this embodiment, since the position of the steam introduction pipe 40 is set lower than the full liquid level FL in the fuel tank T, the steam introduction pipe 40 allows the fuel vapor staying in the upper end region inside the tank to flow into the end pipe. The gas is taken in from the vapor inflow opening 50 a of the passage 50 and introduced into the gas-liquid separator 22. In this case, the introduction of the fuel vapor into the gas-liquid separator 22 occurs as the tank internal pressure increases, and if the fuel liquid level is inclined at that time, the fuel in the tank also enters the vapor inflow opening 50a together with the fuel vapor. It flows in and reaches the gas-liquid separator 22 through the end pipe section 50 and the steam introduction pipe 40. The passage behavior of the fuel and the fuel vapor in the end pipe section 50 will be described later.

ここで、端部管路部50について説明する。図3は本実施例の端部管路部50を分解して示す説明図、図4は端部管路部50における燃料および燃料蒸気の通過挙動を説明するための説明図である。   Here, the end pipe line part 50 will be described. FIG. 3 is an explanatory view showing the end pipe section 50 in an exploded manner according to the present embodiment, and FIG. 4 is an explanatory view for explaining the passage behavior of fuel and fuel vapor in the end pipe section 50.

図示するように、端部管路部50は、蒸気導入管路40の先端を拡張して四角形に賦形されており、対向する側面に二つの貫通孔51を上下に備え、燃料遮蔽体52を嵌め込んで備える。燃料遮蔽体52は、コの字状の左側本体52Lと右側本体52Rとを端面にて接合・固定して形成され、左側本体52Lおよび右側本体52Rは、端部管路部50に燃料遮蔽体52が嵌め込み装着されたときに貫通孔51と合致する貫通孔53を備える。そして、左側本体52Lと右側本体52Rのそれぞれは、貫通孔53の下側を基点として斜め上方に向けて突出した遮蔽板54L、54Rを上下に備える。この遮蔽板54L、54Rは、左側本体52L、52Rの側壁とも接合していることから、これら側壁と相まって、貫通孔53の前方領域に燃料貯留部55を形成する。また、遮蔽板54L、54Rは、左側本体52L、52Rがその端面にて図3に示すように接合・固定された状態では、端部管路部50の管路方向(図における上下方向)に沿って上下にかつ交互に設置し、図示するように遮蔽板54Lの下面とその下方に位置する遮蔽板54Rの先端との間隙を蒸気流路56とする。この蒸気流路56は、図示するように貫通孔51および貫通孔53より上方に位置し、その流路形状は細長いスリット状であるがその流路面積は、Φ1.5〜3mmの管状の流路面積に相当する面積とされている。   As shown in the drawing, the end pipe section 50 is formed into a quadrangle by expanding the tip of the steam introduction pipe 40, and has two through holes 51 on the opposite side surfaces, and a fuel shield 52. To be fitted. The fuel shield 52 is formed by joining and fixing a U-shaped left main body 52L and a right main body 52R at end surfaces, and the left main body 52L and the right main body 52R are connected to the end pipe line portion 50 with a fuel shield. A through-hole 53 that matches the through-hole 51 when the 52 is fitted and mounted is provided. Each of the left main body 52L and the right main body 52R includes shielding plates 54L and 54R that protrude obliquely upward with the lower side of the through hole 53 as a base point. Since the shielding plates 54L and 54R are also joined to the side walls of the left main bodies 52L and 52R, the fuel storage portion 55 is formed in the front region of the through hole 53 together with the side walls. Further, the shielding plates 54L and 54R are arranged in the pipe direction of the end pipe section 50 (vertical direction in the figure) when the left main bodies 52L and 52R are joined and fixed at the end faces thereof as shown in FIG. As shown in the drawing, the gap between the lower surface of the shielding plate 54L and the tip of the shielding plate 54R positioned below is defined as a steam flow path 56. The steam channel 56 is located above the through-hole 51 and the through-hole 53 as shown in the figure, and the channel shape is an elongated slit, but the channel area is a tubular flow of Φ1.5 to 3 mm. The area is equivalent to the road area.

以上説明した構成を有する本実施例の燃料蒸気流出装置10での燃料蒸気および燃料の通過の挙動は次のようになる。まず、燃料タンクTの燃料液位が図2に示す満水液位FLと同じ或いはそれ以下であり、燃料液面に大きな変動がない場合について説明する。こうした状態では、タンク上端側内壁TSより下のタンク内領域、即ちタンクの内部上端領域に存在する燃料蒸気は、タンク内圧の上昇に伴って端部管路部50の蒸気流入開口50aに入り込み、端部管路部50においては、遮蔽板54L、54Rで形成された蒸気流路56を順次通過して蒸気導入管路40に至り、気液分離機22(図1参照)に達する。つまり、燃料蒸気は、蒸気流路56にて屈曲した流路を流れて気液分離機22に導入される。そして、この気液分離機22にて気液分離された後、蒸気排出管路23を通過してキャニスタCにて燃料成分の除去を受け、大気に放出される。こうした状態では、燃料液面に大きな変動がなく、しかも、タンク上端側内壁TSと端部管路部50との隙間が小さいことから、タンク内の燃料が蒸気流入開口50aに入り込むことはほとんどないので、タンク外への不用意は燃料漏洩は起きない。   The behavior of fuel vapor and fuel passing in the fuel vapor outlet apparatus 10 of the present embodiment having the above-described configuration is as follows. First, the case where the fuel level in the fuel tank T is the same as or lower than the full liquid level FL shown in FIG. 2 and there is no significant fluctuation in the fuel level will be described. In such a state, the fuel vapor existing in the tank inner region below the tank upper end inner wall TS, that is, the inner upper end region of the tank, enters the vapor inflow opening 50a of the end pipe portion 50 as the tank internal pressure increases, In the end pipe section 50, the steam flow path 56 formed by the shielding plates 54L and 54R is sequentially passed to the steam introduction pipe 40 and reaches the gas-liquid separator 22 (see FIG. 1). That is, the fuel vapor flows through the flow path bent by the vapor flow path 56 and is introduced into the gas-liquid separator 22. Then, after the gas-liquid separator 22 performs gas-liquid separation, the fuel component is removed by the canister C through the steam discharge pipe 23 and released to the atmosphere. In such a state, there is no large fluctuation in the fuel liquid level, and since the gap between the tank upper end side inner wall TS and the end pipe line portion 50 is small, the fuel in the tank hardly enters the vapor inflow opening 50a. Therefore, fuel leakage does not occur if the tank is inadvertent.

今、車両の旋回や急制動等により燃料タンクTの燃料液面が傾いたり上下すると、燃料液面の変動も大きくなるので、タンク上端側内壁TSと端部管路部50との隙間が小さいと云っても、燃料が燃料蒸気と一緒に蒸気流入開口50aに入り込むことがあり得る。こうして蒸気流入開口50aに入り込んだ燃料は、端部管路部50における最上段の遮蔽板54Lにより下流への流入が遮られ、当該遮蔽板が形成する燃料貯留部55に貯め置かれる。しかも、こうして燃料貯留部55に貯め置かれた燃料は、貫通孔53および貫通孔51を通過してタンク内に戻される。この場合、こうした燃料流入は燃料液面の変動が大きいために起きるのであるが、燃料液位が貫通孔51より常時上にあることはないので、上記した貫通孔を経たタンク内への燃料の戻りは起きる。   Now, when the fuel level of the fuel tank T tilts or rises and falls due to turning or sudden braking of the vehicle, the fluctuation of the fuel level also increases, so the gap between the tank upper end side inner wall TS and the end pipe section 50 is small. Nevertheless, the fuel may enter the steam inlet opening 50a together with the fuel vapor. Thus, the fuel that has entered the steam inflow opening 50a is blocked from flowing downstream by the uppermost shielding plate 54L in the end pipe portion 50, and is stored in the fuel storage portion 55 formed by the shielding plate. Moreover, the fuel stored in the fuel storage portion 55 in this way passes through the through hole 53 and the through hole 51 and is returned to the tank. In this case, such fuel inflow occurs due to large fluctuations in the fuel level. However, since the fuel level is not always above the through hole 51, the fuel flows into the tank through the above-described through hole. A return happens.

そして、最上段の遮蔽板54Lでの燃料貯留部55の容量を超えた分の燃料は、遮蔽板54L先端から下流側に流れるものの、次の段の遮蔽板54Rにより下流への流入が遮られ、当該遮蔽板が形成する燃料貯留部55に貯め置かれつつ、貫通孔53および貫通孔51を通過してタンク内に戻される。こうしたことが次の段の遮蔽板54L、遮蔽板54Rによっても繰り返されるので、蒸気流入開口50aから端部管路部50に流れ込んだ燃料の多くは、燃料貯留部55での貯め置きと貫通孔を経たタンク内への戻りにより、端部管路部50における蒸気流路56を通過して蒸気導入管路40に達することが阻止される。よって、蒸気導入管路40から気液分離機22に到達する燃料量は、端部管路部50を有せずにただ単に蒸気導入管路40の先端をタンク上端側内壁TSの近傍に配置する場合に較べて格段に少なくなる。この結果、上記した構成を有する本実施例の燃料蒸気流出装置10によれば、端部管路部50をタンク上端側内壁TSに近接配置することで燃料タンクTのデットスペースを削減した上で、気液分離機22に達する燃料量の低減を通して、気液分離機22の下流への燃料漏洩の抑制効果を高めることができる。   The fuel exceeding the capacity of the fuel reservoir 55 in the uppermost shielding plate 54L flows downstream from the front end of the shielding plate 54L, but the downstream inflow is blocked by the next shielding plate 54R. While being stored in the fuel storage portion 55 formed by the shielding plate, it passes through the through hole 53 and the through hole 51 and is returned to the tank. Since this is repeated also by the shielding plate 54L and the shielding plate 54R of the next stage, most of the fuel flowing into the end pipe portion 50 from the steam inflow opening 50a is stored in the fuel storage portion 55 and the through hole. The return to the inside of the tank after passing through is prevented from passing through the steam flow path 56 in the end pipe section 50 and reaching the steam introduction pipe 40. Therefore, the amount of fuel that reaches the gas-liquid separator 22 from the steam introduction line 40 is simply arranged with the end of the steam introduction line 40 in the vicinity of the tank upper end inner wall TS without having the end line part 50. This is much less than if you do. As a result, according to the fuel vapor outflow device 10 of the present embodiment having the above-described configuration, the dead space of the fuel tank T is reduced by arranging the end pipe line portion 50 close to the tank upper end side inner wall TS. The effect of suppressing fuel leakage downstream of the gas-liquid separator 22 can be enhanced through a reduction in the amount of fuel reaching the gas-liquid separator 22.

また、本実施例の燃料蒸気流出装置10では、気液分離機22を有する気液分離ユニット20の他、気液分離機22にて分離した燃料をタンク内に戻すためのポンプ30についてもタンク内に設置した。よって、上記した端部管路部50により燃料漏洩の抑制効果を高めた燃料タンクTを容易に提供できる。   Further, in the fuel vapor outflow apparatus 10 of the present embodiment, in addition to the gas-liquid separation unit 20 having the gas-liquid separator 22, the pump 30 for returning the fuel separated by the gas-liquid separator 22 into the tank is also provided in the tank. Installed inside. Therefore, it is possible to easily provide the fuel tank T in which the effect of suppressing fuel leakage is enhanced by the end pipe line part 50 described above.

また、端部管路部50に嵌合装着する燃料遮蔽体52において、燃料の貯め置き機能を果たすに当たり、本実施例では遮蔽板54L、54Rを左側本体52L、52Rの壁面から斜め上方に向けて突出させた上で、これらを端部管路部50の管路方向に沿って上下にかつ交互に設置したに過ぎない。つまり、遮蔽板の斜め突出と上下の交互配置という簡便な構成で、燃料漏洩の高い抑制効果を備えた燃料蒸気流出装置10とできる。   Further, in the present embodiment, when the fuel shield 52 fitted to and attached to the end pipe section 50 performs the fuel storage function, the shield plates 54L and 54R are directed obliquely upward from the wall surfaces of the left main bodies 52L and 52R. These are merely installed vertically and alternately along the pipe line direction of the end pipe part 50. That is, the fuel vapor outflow device 10 having a high suppression effect of fuel leakage can be obtained with a simple configuration of oblique projections of the shielding plates and upper and lower alternate arrangements.

しかも、燃料遮蔽体52を端部管路部50に嵌合装着するだけで燃料漏洩の高い抑制効果を発揮できるので、燃料遮蔽体52の嵌合装着という簡便な手法で、燃料漏洩の抑制効果が高い燃料蒸気流出装置10を得ることができる。このことは、既存の燃料蒸気流出装置における蒸気導入管路40の先端を端部管路部50の様な形状にした上で燃料遮蔽体52を嵌合装着するという簡便な手法で、既存の燃料蒸気流出装置を燃料漏洩の抑制効果が高いものに改造することができることを意味する。   In addition, since the high fuel leakage suppression effect can be exhibited simply by fitting the fuel shield 52 to the end pipe portion 50, the fuel leakage suppression effect can be achieved by a simple method of fitting and mounting the fuel shield 52. Therefore, it is possible to obtain the fuel vapor outflow device 10 having a high value. This is a simple method of fitting and mounting the fuel shield 52 after the tip of the steam introduction pipe 40 in the existing fuel vapor outflow apparatus is shaped like the end pipe section 50. This means that the fuel vapor outflow device can be modified to one that has a high effect of suppressing fuel leakage.

次に変形例について説明する。図5は端部管路部50の形状を筒状とした上で遮蔽板を直接装着した変形例の端部管路部150を斜視と平面視にて説明する説明図、図6は図5に示す端部管路部150を断面視しつつその製造手法を説明するための説明図である。   Next, a modified example will be described. FIG. 5 is an explanatory view for explaining the end pipe section 150 of a modified example in which the end pipe section 50 has a cylindrical shape and is directly attached with a shielding plate in a perspective view and a plan view. FIG. It is explanatory drawing for demonstrating the manufacturing method, seeing the edge part pipeline part 150 shown in FIG.

図示するように、この変形例の端部管路部150は、蒸気導入管路40の先端を拡張して筒状に賦形されており、端部管路部50における貫通孔51と同様に、上下の貫通孔151を対向して備える。また、貫通孔151の下側を基点として斜め上方に向けて突出した円盤状の遮蔽板154L、154Rを上下に備え、これらを既述したように交互に配置させている。これら遮蔽板154L、154Rは、端部管路部150の側壁にその外側から切欠形成された挿入溝152L、152Rに、端部管路部150の外部から挿入されて、水密に固定される。この場合、挿入溝152L、152Rの形成軌跡が斜め上方であることから、遮蔽板154L、154Rは端部管路部150の管路方向に沿って上下かつ交互に配置される。   As shown in the figure, the end pipe section 150 of this modification is formed in a cylindrical shape by expanding the tip of the steam introduction pipe 40, and is similar to the through hole 51 in the end pipe section 50. The upper and lower through-holes 151 are provided opposite to each other. Also, disk-shaped shielding plates 154L and 154R projecting obliquely upward from the lower side of the through hole 151 are provided on the upper and lower sides, and these are alternately arranged as described above. These shielding plates 154L and 154R are inserted from the outside of the end pipe section 150 into the insertion grooves 152L and 152R formed in the side wall of the end pipe section 150 from the outside, and are fixed in a watertight manner. In this case, since the formation trajectories of the insertion grooves 152L and 152R are obliquely upward, the shielding plates 154L and 154R are arranged vertically and alternately along the pipe line direction of the end pipe line part 150.

この端部管路部150にあっても、既述した端部管路部50と同様に、気液分離機22への燃料蒸気の導入を図りつつ、燃料については遮蔽板154L、154Rによる貯め置きや貫通孔151によるタンク内への戻りにより、気液分離機22に達する燃料量の低減を図ることができる。よって、燃料漏洩の抑制効果も高まる。   Even in the end pipe section 150, as with the end pipe section 50 described above, fuel is introduced into the gas-liquid separator 22 and fuel is stored by the shielding plates 154L and 154R. The amount of fuel that reaches the gas-liquid separator 22 can be reduced by placing or returning to the tank through the through-hole 151. Therefore, the effect of suppressing fuel leakage is also increased.

図7はまた別の変形例の端部管路部160を断面視して示す説明図、図8はこの端部管路部160で用いる遮蔽体170の概略斜視図である。この変形例では、遮蔽体170を端部管路部160の管路方向に上下に多段に重ねて配置した上で、遮蔽体170が頂上に有する開口172を重ならないようにした点に特徴がある。   FIG. 7 is an explanatory view showing a sectional view of an end pipe section 160 of another modification, and FIG. 8 is a schematic perspective view of a shield 170 used in the end pipe section 160. This modification is characterized in that the shielding body 170 is arranged in multiple stages in the upper and lower directions in the pipe line direction of the end pipe section 160 and the opening 172 on the top of the shielding body 170 is not overlapped. is there.

この変形例にあっては、端部管路部160は、蒸気導入管路40の先端を拡張して筒状に賦形されており、4つの貫通孔151を上下に並べて備え、各貫通孔の下方に環状の凹所162を多段に備える。遮蔽体170は、頂上部が中央から偏心した位置にある笠状をなし、笠頂上部にΦ1.5〜3mm程度の円形の開口172を備え、笠頂上からの傾斜面174の周縁に円形のフランジ部175を有する。この遮蔽体170は、樹脂成型品であることから、笠の高さが伸びるよう笠形状の変形が可能であるので、このように変形させた上で、端部管路部160のそれぞれの凹所162にフランジ部175を入り込ませて端部管路部160に装着される。それぞれの凹所162への遮蔽体170の装着に際しては、上下の遮蔽体170において開口172が重ならないようにされている。   In this modification, the end pipe section 160 is formed in a cylindrical shape by expanding the tip of the steam introduction pipe 40, and includes four through holes 151 arranged vertically, and each through hole Are provided with multi-stage annular recesses 162 below. The shield 170 is formed in a shade shape in which the top portion is eccentric from the center, is provided with a circular opening 172 having a diameter of about 1.5 to 3 mm in the top portion of the shade, and has a circular shape on the periphery of the inclined surface 174 from the top of the shade. A flange portion 175 is provided. Since this shield 170 is a resin molded product, it can be deformed in a shade shape so that the height of the shade is extended. The flange portion 175 is inserted into the place 162 and attached to the end pipe line portion 160. When the shields 170 are mounted in the respective recesses 162, the openings 172 are not overlapped in the upper and lower shields 170.

この端部管路部160では、その上端開口から入り込んだ燃料蒸気は、それぞれの段の遮蔽体170における開口172を順次通過して、蒸気導入管路40に達し、既述したように気液分離機22に支障なく導入される。つまり、燃料蒸気は、開口172にて屈曲した流路を流れて気液分離機22に導入される。その一方、燃料蒸気と一緒に上端開口から端部管路部160に入り込んだ燃料は、まず、最上段の遮蔽体170にて遮られて傾斜面174の斜面にて貯め置かれつつ、貫通孔151によりタンク内に戻される。そして、最上段の遮蔽体170の傾斜面174による貯め置き量を超える燃料が開口172を通過して次の段の遮蔽体170に流れる。この際、開口172は、上記したように上下の遮蔽体170において重ならないことから、開口172を通過した燃料は、下段の遮蔽体170の傾斜面174にて再度遮られ、各段ごとにこうしたことが繰り返される。よって、この端部管路部160を有する燃料蒸気流出装置にあっても、既述した効果を奏することができる。   In the end pipe section 160, the fuel vapor entering from the upper end opening sequentially passes through the openings 172 in the shields 170 of the respective stages and reaches the steam introduction pipe 40, as described above. The separator 22 is introduced without any trouble. That is, the fuel vapor flows through the flow path bent at the opening 172 and is introduced into the gas-liquid separator 22. On the other hand, the fuel that has entered the end pipe section 160 from the upper end opening together with the fuel vapor is first blocked by the uppermost shield 170 and stored on the slope of the inclined surface 174, while passing through the through hole. 151 returns to the tank. Then, the fuel exceeding the storage amount by the inclined surface 174 of the uppermost shield 170 passes through the opening 172 and flows to the next shield 170. At this time, since the opening 172 does not overlap in the upper and lower shields 170 as described above, the fuel that has passed through the opening 172 is again blocked by the inclined surface 174 of the lower shield 170, and this is done for each stage. Is repeated. Therefore, even in the fuel vapor outflow device having the end pipe line portion 160, the effects described above can be obtained.

図9は他の変形例の端部管路部180を断面視て平面視にて示す説明図である。この変形例では、板状の遮蔽体184を端部管路部180の管路を斜めに遮るよう管路方向に上下に多段に配置した上で、それぞれの遮蔽体184における列状の開口186が重ならないようにした点に特徴がある。   FIG. 9 is an explanatory view showing the end pipe line portion 180 of another modification in a cross-sectional view and in a plan view. In this modified example, the plate-like shields 184 are arranged in multiple stages in the pipeline direction so as to obliquely shield the pipe line of the end pipe part 180, and then the row of openings 186 in each shield 184. It is characterized by the fact that they do not overlap.

この変形例にあっては、端部管路部180は、蒸気導入管路40の先端を拡張して四角形に賦形されており、4つの貫通孔151を上下に並べて備え、各貫通孔の下方から他方側の側面に掛けて斜め上方に延びるスリット182を多列に備える。遮蔽体184は、板状であり、上記のスリット182に嵌め込み装着され、列状の開口186を備える。この場合、平面視にて判るように、それぞれの遮蔽体184における開口186は、重なることがないよう形成されており、最上段の遮蔽体184で貫通孔151に近い位置となるようにされている。この場合、列状の開口186の個々の開口の総面積は、即ち流路面積は、Φ1.5〜3mmの単一の円形開口の面積と同程度とされている。   In this modified example, the end pipe section 180 is formed into a quadrangle by extending the tip of the steam introduction pipe 40, and includes four through holes 151 arranged one above the other. Slits 182 extending diagonally upward from below to the other side are provided in multiple rows. The shield 184 has a plate shape, is fitted into the slit 182 and includes a row of openings 186. In this case, as can be seen in a plan view, the openings 186 in the respective shields 184 are formed so as not to overlap with each other, and the uppermost shield 184 is positioned close to the through hole 151. Yes. In this case, the total area of the individual openings of the row of openings 186, that is, the flow path area, is approximately the same as the area of a single circular opening having a diameter of Φ1.5 to 3 mm.

この端部管路部180では、その上端開口から入り込んだ燃料蒸気は、それぞれの段の遮蔽体184における開口186を順次通過して、蒸気導入管路40に達し、既述したように気液分離機22に支障なく導入される。つまり、燃料蒸気は、開口186にて屈曲した流路を流れて気液分離機22に導入される。その一方、燃料蒸気と一緒に上端開口から端部管路部180に入り込んだ燃料は、まず、最上段の遮蔽体184にて遮られて傾斜した当該遮蔽体自体にて貯め置かれつつ、貫通孔151によりタンク内に戻される。そして、最上段の遮蔽体184による貯め置き量を超える燃料が開口186を通過して次の段の遮蔽体184に流れる。この際、開口186は、上記したように上下の遮蔽体184において重ならないことから、開口186を通過した燃料は、下段の傾斜した遮蔽体184にて再度遮られ、各段ごとにこうしたことが繰り返される。よって、この端部管路部180を有する燃料蒸気流出装置にあっても、既述した効果を奏することができる。   In the end pipe section 180, the fuel vapor that has entered from the upper end opening sequentially passes through the openings 186 in the shields 184 of the respective stages and reaches the steam introduction pipe 40, as described above. The separator 22 is introduced without any trouble. That is, the fuel vapor flows through the flow path bent at the opening 186 and is introduced into the gas-liquid separator 22. On the other hand, the fuel that has entered the end pipe portion 180 from the upper end opening together with the fuel vapor is first blocked by the uppermost shielding body 184 and stored in the inclined shielding body itself, while penetrating. It is returned to the tank through the hole 151. Then, the fuel exceeding the storage amount by the uppermost shield 184 passes through the opening 186 and flows to the next shield 184. At this time, since the opening 186 does not overlap the upper and lower shields 184 as described above, the fuel that has passed through the opening 186 is blocked again by the lower inclined shield 184, and this is the case for each stage. Repeated. Therefore, even in the fuel vapor outflow device having the end pipe line portion 180, the effects described above can be obtained.

しかも、この端部管路部180では、最上段の遮蔽体184において開口186を貫通孔151の側にし、下方の遮蔽体184においては貫通孔151の側から開口186が離れるようにした。よって、上の段の遮蔽体184の開口186から下の段の遮蔽体184に流れ落ちてこの下の段の遮蔽体184により貯め置かれた燃料が、貯め置かれる前にこの下の段の遮蔽体184の開口186から流れることはない。このため、各段の遮蔽体184での燃料貯め置きが確実となる。   Moreover, in the end pipe section 180, the opening 186 is located on the through hole 151 side in the uppermost shield 184, and the opening 186 is separated from the through hole 151 side in the lower shield 184. Therefore, the fuel that has flowed down from the opening 186 of the upper shield 184 to the lower shield 184 and has been stored by the lower shield 184 is shielded by the lower shield before being stored. There is no flow from the opening 186 of the body 184. For this reason, fuel storage by the shield 184 at each stage is ensured.

以上、本発明の実施の形態を実施例にて説明したが、本発明は上記した実施例や変形例の実施形態に限られるものではなく、その要旨を逸脱しない範囲において種々の態様にて実施することが可能である。例えば、図2〜図3で示した四角形状の端部管路部50において、図6の端部管路部150の様に遮蔽板54L、54Rを端部管路部50にその外側から斜め上方に上下・交互に配置するようにもでき、図6や図7の端部管路部150、160において、端部管路部50に倣って別体の燃料遮蔽体52を嵌合装着するようにすることもできる。   As mentioned above, although the embodiment of the present invention has been described in the embodiments, the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the gist thereof. Is possible. For example, in the rectangular end pipe section 50 shown in FIGS. 2 to 3, the shielding plates 54 </ b> L and 54 </ b> R are slanted from the outside to the end pipe section 50 like the end pipe section 150 of FIG. 6. It is possible to arrange the upper and lower parts alternately in the upper and lower directions. In the end pipe line parts 150 and 160 shown in FIGS. 6 and 7, a separate fuel shield 52 is fitted and mounted following the end pipe line part 50. It can also be done.

この他、図1の燃料蒸気流出装置10では、蒸気導入管路40を2系統としたが、1系統(1本)の蒸気導入管路40を有する構成とすることもできる。   In addition, in the fuel vapor outflow apparatus 10 of FIG. 1, the two steam introduction conduits 40 are used, but a configuration having one (one) steam introduction conduit 40 may be employed.

また、図9に示した端部管路部180にあっては、開口186を列状にするほか、種々の態様とできる。図10は開口186の態様を説明する説明図である。図示するように、開口186は、それぞれの段の遮蔽体184において、単一の開口とできるほか(図10(A))、長孔形状の開口186とすることもできる(図10(B))。この他、図10(A)において、ある段の遮蔽体184では開口186を複数個としたり、図10(B)において、長孔形状の開口186を斜めに配置したりすることもできる。   In addition, the end pipe line portion 180 shown in FIG. 9 can take various forms in addition to the openings 186 being arranged in a line. FIG. 10 is an explanatory view for explaining the mode of the opening 186. As shown in the drawing, the opening 186 can be a single opening (FIG. 10A) in each stage of the shield 184 (FIG. 10A), or can be a long hole-shaped opening 186 (FIG. 10B). ). In addition, in FIG. 10A, a plurality of openings 186 can be provided in the shield 184 at a certain stage, or the long hole-shaped openings 186 can be arranged obliquely in FIG. 10B.

本発明の実施例としての燃料蒸気流出装置10の構成を模式的に説明する説明図である。It is explanatory drawing which illustrates typically the structure of the fuel vapor outflow apparatus 10 as an Example of this invention. 図1において符号Aを付した燃料蒸気流出装置10の要部を断面視して示す説明図である。It is explanatory drawing which shows the principal part of the fuel vapor outflow apparatus 10 which attached | subjected the code | symbol A in FIG. 本実施例の端部管路部50を分解して示す説明図である。It is explanatory drawing which decomposes | disassembles and shows the edge part pipe part 50 of a present Example. 端部管路部50における燃料および燃料蒸気の通過挙動を説明するための説明図である。It is explanatory drawing for demonstrating the passage behavior of the fuel and fuel vapor | steam in the edge part pipe part 50. FIG. 端部管路部50の形状を筒状とした上で遮蔽板を直接装着した変形例の端部管路部150を斜視と平面視にて説明する説明図である。It is explanatory drawing explaining the end part pipe line part 150 of the modification which mounted | worn with the shielding board directly after making the shape of the end pipe part 50 into a cylinder shape by a perspective view and planar view. 図5に示す端部管路部150を断面視しつつその製造手法を説明するための説明図である。It is explanatory drawing for demonstrating the manufacturing method, seeing the edge part pipeline part 150 shown in FIG. 5 in cross section. また別の変形例の端部管路部160を断面視して示す説明図である。It is explanatory drawing which shows the end part pipe line part 160 of another modification in sectional view. 端部管路部160で用いる遮蔽体170の概略斜視図である。4 is a schematic perspective view of a shield 170 used in an end pipe line section 160. FIG. 他の変形例の端部管路部180を断面視て平面視にて示す説明図である。It is explanatory drawing which shows the edge part pipeline part 180 of another modification by a cross sectional view and planar view. 変形例の端部管路部180が取り得る開口186の態様を説明する説明図である。It is explanatory drawing explaining the aspect of the opening 186 which the edge part pipe line part 180 of a modification can take.

符号の説明Explanation of symbols

10…燃料蒸気流出装置
20…気液分離ユニット
22…気液分離機
23…蒸気排出管路
24…蒸気遮断弁
26…管路開閉弁
28…逆止弁
30…ポンプ
31…排出管路
32…ポンプ排出ポート
40…蒸気導入管路
50…端部管路部
50a…蒸気流入開口
51…貫通孔
52…燃料遮蔽体
52L…左側本体
52R…右側本体
53…貫通孔
54L…遮蔽板
54R…遮蔽板
55…燃料貯留部
56…蒸気流路
150…端部管路部
151…貫通孔
152L、152R…挿入溝
154L…遮蔽板
160…端部管路部
162…凹所
170…遮蔽体
172…開口
174…傾斜面
175…フランジ部
T…燃料タンク
C…キャニスタ
FL…満水液位
TS…タンク上端側内壁
DESCRIPTION OF SYMBOLS 10 ... Fuel vapor outflow apparatus 20 ... Gas-liquid separation unit 22 ... Gas-liquid separator 23 ... Steam discharge pipe 24 ... Steam cutoff valve 26 ... Pipe on-off valve 28 ... Check valve 30 ... Pump 31 ... Discharge pipe 32 ... Pump discharge port 40 ... Steam introduction conduit 50 ... End conduit portion 50a ... Steam inlet opening 51 ... Through hole 52 ... Fuel shield 52L ... Left body 52R ... Right body 53 ... Through hole 54L ... Shield plate 54R ... Shield plate DESCRIPTION OF SYMBOLS 55 ... Fuel storage part 56 ... Steam flow path 150 ... End part pipe part 151 ... Through-hole 152L, 152R ... Insertion groove 154L ... Shielding plate 160 ... End part pipe part 162 ... Recess 170 ... Shielding body 172 ... Opening 174 ... Inclined surface 175 ... Flange part T ... Fuel tank C ... Canister FL ... Full liquid level TS ... Tank upper side inner wall

Claims (9)

燃料タンクの内部上端領域に滞留した燃料蒸気を気液分離機を経由してタンク外に流出する燃料蒸気流出装置であって、
前記滞留した燃料蒸気を前記気液分離機に導入するようタンク内に配置された蒸気導入管路を備え、
該蒸気導入管路は、
前記内部上端領域に蒸気流入開口を含む端部管路部を位置させ、該端部管路部において、前記蒸気流入開口から管路に入り込んだ液相の燃料を管路内に貯め置きつつ、前記蒸気流入開口から管路に入り込んだ気相の燃料蒸気については管路を通過させる燃料遮蔽機構と、
該燃料遮蔽機構により前記端部管路部の管路内に貯め置かれた燃料を燃料タンク内に排出する排出路とを有する
燃料蒸気流出装置。
A fuel vapor outflow device for flowing out fuel vapor staying in the upper end region inside the fuel tank to the outside of the tank via a gas-liquid separator,
A steam introduction line arranged in a tank to introduce the staying fuel vapor into the gas-liquid separator;
The steam inlet line is
An end pipe section including a steam inflow opening is positioned in the inner upper end region, and in the end pipe section, while storing liquid-phase fuel that has entered the pipe from the steam inflow opening in the pipe, A fuel shielding mechanism for allowing vapor phase fuel vapor entering the pipeline from the vapor inlet opening to pass through the pipeline;
A fuel vapor outflow device comprising: a discharge passage for discharging the fuel stored in the pipe of the end pipe section into the fuel tank by the fuel shielding mechanism.
前記排出路は、前記燃料遮蔽機構が前記燃料蒸気を通過させる蒸気流路よりも下方に配設されている請求項1に記載の燃料蒸気流出装置。   2. The fuel vapor outflow device according to claim 1, wherein the discharge path is disposed below a vapor flow path through which the fuel shielding mechanism allows the fuel vapor to pass. 前記燃料遮蔽機構が前記燃料蒸気を通過させる蒸気流路は、その流路面積が直径で1.5〜3mmの管状の流路面積に相当する面積となるようにされている請求項1に記載の燃料蒸気流出装置。   2. The steam flow path through which the fuel shielding mechanism allows the fuel vapor to pass is configured such that the flow path area corresponds to a tubular flow path area having a diameter of 1.5 to 3 mm. Fuel vapor spill device. 請求項1ないし請求項3いずれかに記載の燃料蒸気流出装置であって、
前記気液分離機を燃料タンク内に備えると共に、
前記気液分離器にて分離された気相の燃料蒸気を、前記気液分離器から燃料タンク外に流出させる蒸気流出管路と、
前記気液分離器にて分離された液相の燃料を、前記気液分離器から前記燃料タンクに排出する燃料排出系とを備える
燃料蒸気流出装置。
The fuel vapor outflow device according to any one of claims 1 to 3,
While providing the gas-liquid separator in a fuel tank,
A vapor outflow line for allowing the gas-phase fuel vapor separated by the gas-liquid separator to flow out of the fuel tank from the gas-liquid separator;
A fuel vapor outflow device comprising: a fuel discharge system that discharges liquid phase fuel separated by the gas-liquid separator from the gas-liquid separator to the fuel tank.
請求項1ないし請求項4いずれかに記載の燃料蒸気流出装置であって、
前記燃料遮蔽機構は、
前記端部管路部の管路を斜めに遮るよう斜め上方に向けて突出してた板状の遮蔽体を備え、該遮蔽体により燃料の流れを遮りつつ前記遮蔽体の上に燃料を貯め置くと共に、少なくとも2枚以上の前記遮蔽体を組み合わせて屈曲流路を形成し、該屈曲流路にて前記燃料蒸気を通過させる
燃料蒸気流出装置。
The fuel vapor outflow device according to any one of claims 1 to 4,
The fuel shielding mechanism includes:
A plate-shaped shield projecting obliquely upward so as to obliquely block the pipe line of the end pipe section is provided, and fuel is stored on the shield while blocking the flow of fuel by the shield. In addition, a fuel vapor outflow device that combines at least two or more of the shields to form a bent flow path and allows the fuel vapor to pass through the bent flow path.
前記板状の遮蔽体は、前記端部管路部の管路壁面から斜め上方に向けて突出し、前記端部管路部の管路方向に沿って上下に隔離しつつ交互に設置されている請求項5に記載の燃料蒸気流出装置。   The plate-like shields protrude obliquely upward from the pipe wall surface of the end pipe part, and are alternately installed while being separated vertically along the pipe direction of the end pipe part. The fuel vapor outflow device according to claim 5. 前記板状の遮蔽体のそれぞれは、開口を有し、該開口が重なり合うことなく前記端部管路部の管路方向に沿って多段に配設されている請求項5に記載の燃料蒸気流出装置。   6. The fuel vapor outflow according to claim 5, wherein each of the plate-shaped shields has an opening, and the openings are arranged in multiple stages along the pipe line direction of the end pipe part without overlapping the openings. apparatus. 請求項1ないし請求項4いずれかに記載の燃料蒸気流出装置であって、
前記燃料遮蔽機構は、
笠状をなして笠頂上部に開口を有する遮蔽体を複数備え、該複数の前記遮蔽体を前記開口が重なり合うことなく前記端部管路部の管路方向に沿って上下に配設した
燃料蒸気流出装置。
The fuel vapor outflow device according to any one of claims 1 to 4,
The fuel shielding mechanism includes:
A plurality of shields each having a shade shape and having an opening at the top of the shade top, wherein the plurality of shields are arranged vertically along the pipeline direction of the end pipeline portion without overlapping the openings. Steam spill device.
請求項5ないし請求項8いずれかに記載の燃料蒸気流出装置であって、
前記遮蔽体を有する前記燃料遮蔽機構を前記端部管路部とは別体に備え、該別体の前記燃料遮蔽機構を前記端部管路部の管路に挿入して備える
燃料蒸気流出装置。
A fuel vapor efflux device according to any one of claims 5 to 8,
The fuel shielding mechanism having the shielding body is provided separately from the end pipe section, and the separate fuel shielding mechanism is inserted into the pipe of the end pipe section. .
JP2007248506A 2007-09-26 2007-09-26 Fuel vapor outflow device Pending JP2009078648A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010196553A (en) * 2009-02-24 2010-09-09 Honda Motor Co Ltd Fuel tank system
CN105299981A (en) * 2015-12-01 2016-02-03 昆山方佳机械制造有限公司 Gas-liquid separating device and refrigeration cycle system using same
US20160229287A1 (en) * 2015-02-06 2016-08-11 United Technologies Corporation Splash resistant oil tank fill tube
JP2017036675A (en) * 2015-08-07 2017-02-16 京三電機株式会社 Liquid fuel capturing device
CN108248740A (en) * 2016-12-28 2018-07-06 本田技研工业株式会社 The gas-liquid separator arrangement of Straddle type vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010196553A (en) * 2009-02-24 2010-09-09 Honda Motor Co Ltd Fuel tank system
US20160229287A1 (en) * 2015-02-06 2016-08-11 United Technologies Corporation Splash resistant oil tank fill tube
US9981549B2 (en) * 2015-02-06 2018-05-29 United Technologies Corporation Splash resistant oil tank fill tube
JP2017036675A (en) * 2015-08-07 2017-02-16 京三電機株式会社 Liquid fuel capturing device
CN105299981A (en) * 2015-12-01 2016-02-03 昆山方佳机械制造有限公司 Gas-liquid separating device and refrigeration cycle system using same
CN108248740A (en) * 2016-12-28 2018-07-06 本田技研工业株式会社 The gas-liquid separator arrangement of Straddle type vehicle
JP2018108752A (en) * 2016-12-28 2018-07-12 本田技研工業株式会社 Gas-liquid separator arrangement structure of saddle-riding type vehicle
CN108248740B (en) * 2016-12-28 2020-01-07 本田技研工业株式会社 Gas-liquid separator arrangement structure for straddle-type vehicle

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