JPH07309276A - Fuel tank breezer structure for riding-over type vehicle - Google Patents
Fuel tank breezer structure for riding-over type vehicleInfo
- Publication number
- JPH07309276A JPH07309276A JP10696494A JP10696494A JPH07309276A JP H07309276 A JPH07309276 A JP H07309276A JP 10696494 A JP10696494 A JP 10696494A JP 10696494 A JP10696494 A JP 10696494A JP H07309276 A JPH07309276 A JP H07309276A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- liquid separator
- fuel tank
- breezer
- breather pipe
- 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
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は跨座型車両用燃料タンク
のブリーザ構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved breather structure for a fuel tank for a straddle type vehicle.
【０００２】[0002]
【従来の技術】自動二輪車や自動三輪車に代表される跨
座型車両用燃料タンクは、給油口にキャップを備え、燃
料を補充する時以外はキャップは取付けた状態となって
いる。燃料の消費にともなって燃料タンク内部が負圧に
なることがないように、ブリーザ機構にて大気を補充し
てタンク内圧をほぼ大気圧に保つようにしている。ま
た、温度変化にてもタンクの内圧は変化するがこの場合
にも、ブリーザ機構はタンク内圧を一定に保つ作用をな
す。2. Description of the Related Art A fuel tank for a straddle type vehicle represented by a motorcycle and a motorcycle has a cap at a fuel filler port, and the cap is attached except when refueling. In order to prevent the inside of the fuel tank from becoming negative pressure due to fuel consumption, the breather mechanism supplements the atmosphere to keep the tank internal pressure at about atmospheric pressure. In addition, the internal pressure of the tank changes even when the temperature changes, and even in this case, the breather mechanism acts to keep the internal pressure of the tank constant.
【０００３】ブリーザ機構には、種々の形式のものが実
用化されており、例えば特開昭６２−１９９５７９号公
報の「自動二輪車等のフューエルタンクブリーザ回路」
は、商品外観性やメンテナンス性に優れたブリーザ回路
である。具体的には、同公報の第４図に示される通り、
フューエルタンク２１の底からブリーザチューブ２３を
内部に挿通し、そのチューブ２３の上端に気液セパレー
タ２２を取付け、この気液セパレータ２２をフューエル
タンク２１の内部上部に保持したものであり、目立たな
いところにブリーザチューブ２３を配設したことを特徴
とする。気液セパレータの別の具体例を次に示す。Various types of breather mechanisms have been put into practical use. For example, Japanese Patent Laid-Open No. 62-199579 discloses a "fuel tank breather circuit for motorcycles".
Is a breather circuit with excellent product appearance and maintainability. Specifically, as shown in FIG. 4 of the publication,
The breather tube 23 is inserted from the bottom of the fuel tank 21, the gas-liquid separator 22 is attached to the upper end of the tube 23, and the gas-liquid separator 22 is held in the upper inside of the fuel tank 21. The breather tube 23 is arranged in the above. Another specific example of the gas-liquid separator is shown below.
【０００４】図１３は従来の燃料タンクと気液セパレー
タとブリーザパイプとを示す図であり、燃料タンク１０
１の上部の給油口１０２を囲う位置に且つ燃料タンク１
０１の内部上部に気液セパレータ１０３が溶接にて取付
けられ、この気液セパレータ１０３にブリーザパイプ１
０５の上端を差込み、ブリーザパイプ１０５の下部を燃
料タンク１０１の底を貫通させた構造となっている。気
液セパレータ１０３は上部，下部にそれぞれ小孔１０３
ａ，１０３ｂが開けられているので、ブリーザパイプ１
０５及び小孔１０３ａ，１０３ｂを介して燃料タンク１
０１に外の空気を取込むことができる。また、万一、気
液セパレータ１０３に燃料が満たされた場合には、この
燃料は小孔１０３ｂから滴下し、替りに小孔１０３ａか
ら空気が気液セパレータ１０３を満たし、いわゆる気液
分離作用をなす。FIG. 13 is a view showing a conventional fuel tank, a gas-liquid separator and a breather pipe.
The fuel tank 1 at a position surrounding the fuel filler port 102 on the upper side of the fuel tank 1
The gas-liquid separator 103 is attached to the upper inside of 01 by welding, and the breather pipe 1 is attached to the gas-liquid separator 103.
The upper part of 05 is inserted, and the lower part of the breather pipe 105 penetrates the bottom of the fuel tank 101. The gas-liquid separator 103 has small holes 103 at the top and bottom, respectively.
Since a and 103b are opened, breather pipe 1
05 and the small holes 103a and 103b through the fuel tank 1
The outside air can be taken into 01. Further, if the gas-liquid separator 103 is filled with fuel, this fuel drips from the small hole 103b, and instead the air fills the gas-liquid separator 103 from the small hole 103a, which causes a so-called gas-liquid separation action. Eggplant
【０００５】図１４は図１３の燃料タンクの組立要領図
であり、中空ドーナツ状の気液セパレータ１０３にＳ字
形のブリーザパイプ１０５の上端を下から差込み、Ａで
示した箇所をろー付け固定したものを予め準備し、この
ブリーザパイプ１０５付き気液セパレータ１０３を、燃
料タンク１０１の上半体１０１ａに取付け（矢印，
）、Ｂ，Ｂ箇所で溶接止めする。次に、上半体１０１
ａに燃料タンク１０１の下半体１０１ｂを合せる（矢印
，）。この際に、ブリーザパイプ１０５の下部は下
半体１０１ｂを貫通させる（矢印）。そして図１３に
戻って、上半体１０１ａと下半体１０１ｂとをＣ，Ｃ箇
所で溶接接合し、更に下半体１０１ｂとブリーザパイプ
１０５とをＤ箇所でろー付け固定する。FIG. 14 is an assembly procedure diagram of the fuel tank of FIG. 13, in which the upper end of an S-shaped breather pipe 105 is inserted into the hollow donut-shaped gas-liquid separator 103 from below, and the portion indicated by A is fixed by filtering. The gas-liquid separator 103 with the breather pipe 105 is attached to the upper half 101a of the fuel tank 101 (arrow,
), B, B stop welding. Next, the upper half 101
The lower half 101b of the fuel tank 101 is aligned with a (arrow,). At this time, the lower part of the breather pipe 105 penetrates the lower half body 101b (arrow). Then, returning to FIG. 13, the upper half body 101a and the lower half body 101b are welded and joined at the C and C locations, and further, the lower half body 101b and the breather pipe 105 are fixed at the D location by rotting.
【０００６】[0006]
【発明が解決しようとする課題】図１３に示した燃料タ
ンク構造は、基本的に溶接構造であるため、気液セパレ
ータ１０３やブリーザパイプ１０５は炭素鋼等の金属製
でなければならない。軽量化やコストダウンを目的に気
液セパレータ１０３を樹脂化することは、溶接の関係で
困難である。しかも図１４の様に、Ａ，Ｂ，Ｃ，Ｄで示
した箇所を順にろー付け若しくは溶接しなければならな
いので、組立作業は容易でない。Since the fuel tank structure shown in FIG. 13 is basically a welded structure, the gas-liquid separator 103 and the breather pipe 105 must be made of metal such as carbon steel. It is difficult to make the gas-liquid separator 103 into resin for the purpose of weight reduction and cost reduction due to welding. Moreover, as shown in FIG. 14, the portions indicated by A, B, C, and D must be attached or welded in order, so that the assembling work is not easy.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に本発明は、燃料タンクの上部に給油口を開け、この給
油口を囲い且つ燃料タンクの内部に中空の気液セパレー
タを配置し、この気液セパレータにブリーザパイプの一
端を連結した跨座型車両用燃料タンクのブリーザ構造に
おいて、前記気液セパレータを締結部材にて燃料タンク
に固着したことを特徴とする。In order to solve the above-mentioned problems, the present invention is to open a refueling opening in the upper part of a fuel tank, and to arrange a hollow gas-liquid separator inside the fuel tank surrounding this refueling opening, In the breather structure of a straddle-type vehicle fuel tank in which one end of a breather pipe is connected to the gas-liquid separator, the gas-liquid separator is fixed to the fuel tank with a fastening member.
【０００８】気液セパレータは樹脂製セパレータであっ
てもよい。The gas-liquid separator may be a resin separator.
【０００９】更に、ブリーザパイプを気液セパレータに
嵌合結合する。Further, the breather pipe is fitted and connected to the gas-liquid separator.
【００１０】前記気液セパレータに、気液セパレータの
外圧が急増した時に弁が閉じ、それ以外の時に弁が開く
逆止弁を一体的に取付けることが望ましい。It is desirable to integrally attach a check valve to the gas-liquid separator, which closes the valve when the external pressure of the gas-liquid separator suddenly increases and opens the valve at other times.
【００１１】[0011]
【作用】気液セパレータをボルト等の締結部材で燃料タ
ンクに取付けることで、溶接結合を止める。[Operation] The welding connection is stopped by attaching the gas-liquid separator to the fuel tank with a fastening member such as a bolt.
【００１２】樹脂製セパレータを採用することで軽量化
などを可能にする。By using a resin separator, it is possible to reduce the weight.
【００１３】ブリーザパイプを気液セパレータに嵌合結
合することで、溶接結合を止める。The weld connection is stopped by fitting and connecting the breather pipe to the gas-liquid separator.
【００１４】気液セパレータに逆止弁を一体的に取付け
ることにより、燃料タンク内の液面変動が気液セパレー
タ内部に与える影響をより効果的に抑えることができ
る。By integrally mounting the check valve on the gas-liquid separator, it is possible to more effectively suppress the influence of the fluctuation of the liquid level in the fuel tank on the inside of the gas-liquid separator.
【００１５】[0015]
【実施例】本発明の実施例を添付図に基づいて以下に説
明する。なお、図面は符号の向きに見るものとする。図
１は本発明に係る自動二輪車の側面図であり、自動二輪
車１は車体フレーム２の前部のヘッドパイプ３にフロン
トフォーク４を介して前輪５を取付け、車体フレーム２
の中央上部に燃料タンク３０及びシート７を取付け、車
体フレーム２の中央にエンジン８及び気化器９，エアク
リーナ１１を収納し、車体フレーム２の後部にスイング
アーム１２及びリアクッション１３を介して後輪１４を
取付けたものである。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a side view of a motorcycle according to the present invention. In a motorcycle 1, a front wheel 5 is attached to a head pipe 3 at a front portion of a vehicle body frame 2 via a front fork 4, and a vehicle body frame 2 is provided.
The fuel tank 30 and the seat 7 are attached to the upper center of the vehicle body, the engine 8, the carburetor 9 and the air cleaner 11 are housed in the center of the vehicle body frame 2, and the rear wheel is provided at the rear portion of the vehicle body frame 2 via the swing arm 12 and the rear cushion 13. 14 is attached.
【００１６】図２は本発明に係る自動二輪車の背面図で
あり、自動二輪車１は背後から見た場合にステアリング
ハンドル１６、メータ類１７、バックミラー１８，１
８、燃料タンク３０、シート７、リアフェンダ１９、ナ
ンバー取付け部２１、リアウインカ２２，２２、リアク
ッション１３，１３、後輪１４及び集合型排気管２３が
見える。FIG. 2 is a rear view of the motorcycle according to the present invention. When the motorcycle 1 is viewed from behind, the steering wheel 16, the meters 17, the rearview mirrors 18, 1 are shown.
8, the fuel tank 30, the seat 7, the rear fender 19, the number mounting portion 21, the rear blinkers 22, 22, the rear cushions 13, 13, the rear wheels 14, and the collective exhaust pipe 23 can be seen.
【００１７】図３は本発明に係る自動二輪車の平面図で
あり、中央上部の燃料タンク３０の上部にキャップ２４
が取付けられていることを示す。その他、２５，２５は
フロントウインカ、２６はチェンジペダル、２７はブレ
ーキペダル、２８，２８はステップである。FIG. 3 is a plan view of the motorcycle according to the present invention, in which the cap 24 is provided on the upper part of the fuel tank 30 in the upper center part.
Indicates that is installed. In addition, 25 and 25 are front blinkers, 26 is a change pedal, 27 is a brake pedal, and 28 and 28 are steps.
【００１８】図４は本発明に係る燃料タンクの断面図で
あり、燃料タンク３０は上半体３１と下半体３２とを重
ねた容器であり、上半体３１の上部略中央に凹部３３及
び給油口３４を形成し、この給油口３４を囲う位置に且
つタンクの内部に気液セパレータ４０をボルト・ナット
などの締結部材で締結し、この気液セパレータ４０にブ
リーザパイプ３６の上端を差込み、ブリーザパイプ３６
の下端を下半体３２に貫通させたものである。３７は前
記凹部３３の溜り水を排出するためのドレーンパイプで
ある。FIG. 4 is a cross-sectional view of the fuel tank according to the present invention. The fuel tank 30 is a container in which an upper half body 31 and a lower half body 32 are overlapped with each other, and a recess 33 is formed substantially in the upper center of the upper half body 31. And the fuel filler port 34 is formed, and the gas-liquid separator 40 is fastened to the position surrounding the fuel filler port 34 and inside the tank with a fastening member such as a bolt and nut, and the upper end of the breather pipe 36 is inserted into the gas-liquid separator 40. , Breather Pipe 36
The lower end of is penetrated into the lower half 32. Reference numeral 37 is a drain pipe for discharging the accumulated water in the recess 33.
【００１９】図５は本発明に係る気液セパレータの平面
図、図６は図５の６−６線断面図であり、図６に示す通
り気液セパレータ４０は略円断面の中空ドーナツ状リン
グであり、実施例では樹脂製上半体４１と樹脂製下半体
４２とを接着接合したものであり、上半体４１の最上部
に少なくとも１個の小孔４３が開けられている。図７は
図５の７−７線断面図であり、下半体４２の下部に少な
くとも１個の液溜め部４４及び小孔４５を形成する。FIG. 5 is a plan view of the gas-liquid separator according to the present invention, and FIG. 6 is a sectional view taken along line 6-6 of FIG. 5. As shown in FIG. 6, the gas-liquid separator 40 is a hollow donut-shaped ring having a substantially circular cross section. In the embodiment, the resin upper half body 41 and the resin lower half body 42 are adhesively joined, and at least one small hole 43 is formed in the uppermost portion of the upper half body 41. FIG. 7 is a sectional view taken along line 7-7 of FIG. 5, in which at least one liquid reservoir portion 44 and a small hole 45 are formed in the lower portion of the lower half body 42.
【００２０】図８（ａ）は図５の８−８線断面図（ブリ
ーザパイプ挿入部）であり、下半体４２にアウタネック
部４７、通孔４８及びインナネック部４９を形成し、こ
のインナネック部４９にラバースリーブ５１をセットし
たものである。このラバースリーブ５１は内径が想像線
で示したブリーザパイプ３６の外径より所定寸法小さ
い。また、上半体４１に左右からリブ５２，５２（正し
くは左右前後の４枚リブ。図８（ｂ）で説明する。）を
張出し、これらリブ５２，５２間にラバースリーブ５３
をセットしたものである。ただし、一方のリブ５２にス
トッパ５４を設け、下から挿入するブリーザパイプ３６
の先端を当て止めする構造とし、且つ当て止めしたブリ
ーザパイプ３６の先端が閉塞しないように、上部に小さ
な空間５５を確保する。この小さな空間５５を十分に高
い位置にするべく、上半体４１に上へ膨出した凸部５６
を一体形成する。図８（ｂ）は図８（ａ）のｂ−ｂ線断
面図であり、ラバースリーブ５３は上半体４１に十字形
を呈するように膨出形成された４枚のリブ５２…にセッ
トされる。FIG. 8 (a) is a sectional view taken along line 8-8 of FIG. 5 (breather pipe insertion portion). An outer neck portion 47, a through hole 48 and an inner neck portion 49 are formed in the lower half body 42, and the inner neck portion 49 is formed. A rubber sleeve 51 is set on the neck portion 49. The rubber sleeve 51 has an inner diameter smaller than the outer diameter of the breather pipe 36 shown by an imaginary line by a predetermined dimension. Further, ribs 52, 52 (correctly, four ribs on the left, right, front and back, which will be described with reference to FIG. 8B) are extended from the left and right on the upper half body 41, and the rubber sleeve 53 is provided between these ribs 52, 52.
Is a set. However, one of the ribs 52 is provided with a stopper 54, and the breather pipe 36 to be inserted from below is inserted.
The structure is such that the tip of the breather pipe 36 is stopped, and a small space 55 is secured in the upper part so that the end of the breather pipe 36 that is stopped is not blocked. In order to set this small space 55 to a sufficiently high position, the convex portion 56 that bulges upward on the upper half body 41.
Are integrally formed. 8B is a sectional view taken along line bb of FIG. 8A, in which the rubber sleeve 53 is set on the four ribs 52 that are formed so as to have a cruciform shape on the upper half body 41. It
【００２１】図９は図５の９−９線断面図であり、ボル
ト孔５８の開けられた取付け部５９が径内方へ膨出形成
されている。６１は補強リブである。FIG. 9 is a sectional view taken along line 9-9 of FIG. 5, in which a mounting portion 59 having a bolt hole 58 is formed so as to bulge radially inward. Reference numeral 61 is a reinforcing rib.
【００２２】以上の構成からなる気液セパレータ４０の
組立方法を次に述べる。図１０は本発明に係る気液セパ
レータの取付け図であり、当該ボルト孔５８と同径のネ
ック部６２ａを備え且つめすねじ部６２ｂをも備えた締
結部材としてのネック付きボルト６２を準備し、このボ
ルト６２をボルト孔５８に挿通し、座金６３，ナット６
４を取付け、更にボルト６２をパッキン６５を介して凹
部３３のビス６６にて固定する。パッキン６５はタンク
内の燃料ガスが外に漏れることを防止する効果を発揮す
る。なお、締結部材としてのボルト６２は、ビス、リベ
ット、ホック、クランプ、面ファスナーなどの非溶接締
結手段であり、要は気液セパレータ４０を燃料タンク３
０に取付ける機械的手段であれば種類は問わない。A method of assembling the gas-liquid separator 40 having the above structure will be described below. FIG. 10 is a mounting view of a gas-liquid separator according to the present invention, in which a necked bolt 62 as a fastening member having a neck portion 62a having the same diameter as the bolt hole 58 and also a female screw portion 62b is prepared, The bolt 62 is inserted into the bolt hole 58, and the washer 63 and the nut 6 are inserted.
4 is attached, and further the bolt 62 is fixed by the screw 66 of the recess 33 through the packing 65. The packing 65 has an effect of preventing the fuel gas in the tank from leaking to the outside. The bolts 62 as fastening members are non-welding fastening means such as screws, rivets, hooks, clamps, surface fasteners, etc.
Any mechanical means can be used as long as it is attached to 0.
【００２３】次に気液セパレータを含む燃料タンクの組
立方法を説明する。図１１（ａ），（ｂ）は本発明に係
る燃料タンクの組立説明図であり、（ａ）の燃料タンク
の上半体３１に、図１０で説明した要領で気液セパレー
タ４０をボルト止めし（矢印，）、この気液セパレ
ータ４０にブリーザパイプ３６の上端を差込む（矢印
）。次に燃料タンクの下半体３２を上半体３１に重ね
（矢印，）、図１１（ｂ）のＥ，Ｅで溶接し、Ｆで
ろー付けする。この図１１（ｂ）と図１３を比較する
と、本発明の燃料タンク３０は気液セパレータ４０をボ
ルト等の締結部材にて燃料タンク３０に固定したこと、
及びブリーザパイプ３６の上端を気液セパレータ４０に
嵌合したことを特徴とする。この構成によって、気液セ
パレータ４０を樹脂化することが可能となった。Next, a method of assembling the fuel tank including the gas-liquid separator will be described. FIGS. 11A and 11B are assembly explanatory views of the fuel tank according to the present invention, in which the gas-liquid separator 40 is bolted to the upper half body 31 of the fuel tank of FIG. Then, the upper end of the breather pipe 36 is inserted into this gas-liquid separator 40 (arrow). Next, the lower half body 32 of the fuel tank is overlaid on the upper half body 31 (arrow), welded at E in FIG. Comparing FIG. 11 (b) and FIG. 13, the fuel tank 30 of the present invention has the gas-liquid separator 40 fixed to the fuel tank 30 by fastening members such as bolts.
Also, the upper end of the breather pipe 36 is fitted to the gas-liquid separator 40. With this configuration, the gas-liquid separator 40 can be made of resin.
【００２４】続いて本発明の燃料タンク３０及び気液セ
パレータ４０の作用を説明する。図４において、図示せ
ぬ燃料が消費されると油面が下がる。このままでは燃料
タンク３０の内部が負圧になるので、この時には外の空
気がブリーザパイプ３６、気液セパレータ４０の中空
部、図６，７の小孔４３，４５を介して燃料タンク３０
の内部に補給される。温度上昇等で燃料タンク３０の内
圧が上昇する場合には、その圧が前記小孔４３，４５、
気液セパレータ４０の中空部、ブリーザパイプ３６を介
して外へ逃される。Next, the operation of the fuel tank 30 and the gas-liquid separator 40 of the present invention will be described. In FIG. 4, when the fuel (not shown) is consumed, the oil level drops. Under this condition, the inside of the fuel tank 30 has a negative pressure, and at this time, the outside air passes through the breather pipe 36, the hollow portion of the gas-liquid separator 40, and the small holes 43 and 45 of FIGS.
Is replenished inside. When the internal pressure of the fuel tank 30 rises due to temperature rise or the like, the pressure is increased by the small holes 43, 45,
It is escaped to the outside through the breather pipe 36 and the hollow portion of the gas-liquid separator 40.
【００２５】自動二輪車のバンク操作等にて気液セパレ
ータ４０が燃料中に没することがある。燃料（含む燃料
ミスト）は小孔４３，４５を介して気液セパレータ４０
に侵入する。しかし、図８に示す通りブリーザパイプ３
６の上端が空間５５に臨み、この空間５５が高い位置に
あるため、簡単には気液セパレータ４０中の燃料がブリ
ーザパイプ３６に入ることはない。バンクが解消されれ
ば、燃料は下位の小孔４５を通って元の油面へ落下し、
気液セパレータ４０は空になる。The gas-liquid separator 40 may be submerged in the fuel due to bank operation or the like of the motorcycle. The fuel (including the fuel mist) passes through the small holes 43, 45 and the gas-liquid separator 40.
Break into. However, as shown in FIG. 8, the breather pipe 3
Since the upper end of 6 faces the space 55 and this space 55 is at a high position, the fuel in the gas-liquid separator 40 does not easily enter the breather pipe 36. If the bank is cleared, the fuel will pass through the lower small holes 45 and fall back to the original oil level,
The gas-liquid separator 40 becomes empty.
【００２６】図１２は本発明の気液セパレータの別実施
例図（図７の別実施例図）であり、図７の液溜め部４４
の替りに弁収納部６９を下半体４２に一体形成し、この
弁収納部６９に、特殊な逆止弁７０を取付けたことを特
徴とする。この逆止弁７０はリーク通路７１の付いた下
部弁座７２と、普通の上部弁座７３と、これら弁座７
２，７３の間に設けられた板状弁体７４とからなる。燃
料消費にともなって油面が下がる場合には、ブリーザパ
イプ３６、気液セパレータ４０の中空部、逆止弁７０の
リーク通路７１を介して外の空気が燃料タンク内に至
る。緩やかに燃料タンク３０の内圧が上がる場合も、リ
ーク通路７１を通じて圧が外へ逃される。バンク等で気
液セパレータ４０が急に燃料に没した時には、弁体７４
が上昇して上部弁座７３に当接し、逆止弁７０は閉状態
になる。従って、気液セパレータ４０への燃料の侵入速
度は著しく低下する。このことによって、燃料が気液セ
パレータ内に入ることは効果的に抑制される。FIG. 12 is a view of another embodiment of the gas-liquid separator of the present invention (another embodiment of FIG. 7).
Instead of the above, a valve housing portion 69 is integrally formed with the lower half body 42, and a special check valve 70 is attached to the valve housing portion 69. The check valve 70 includes a lower valve seat 72 having a leak passage 71, an ordinary upper valve seat 73, and these valve seats 7
And a plate-shaped valve element 74 provided between the two. When the oil level is lowered due to fuel consumption, outside air reaches the fuel tank through the breather pipe 36, the hollow portion of the gas-liquid separator 40, and the leak passage 71 of the check valve 70. Even when the internal pressure of the fuel tank 30 gradually rises, the pressure is released to the outside through the leak passage 71. When the gas-liquid separator 40 is suddenly submerged in fuel in a bank or the like, the valve element 74
Rises to come into contact with the upper valve seat 73, and the check valve 70 is closed. Therefore, the invasion speed of the fuel into the gas-liquid separator 40 is significantly reduced. This effectively prevents the fuel from entering the gas-liquid separator.
【００２７】尚、本発明の跨座型車両用燃料タンクのブ
リーザ構造は、自動二輪車以外の跨座型自動三輪車およ
び四輪車に適用できる。また、気液セパレータ４０は樹
脂の他、軽量非鉄金属が好適である。The breather structure for a fuel tank for a straddle-type vehicle according to the present invention can be applied to straddle-type motorcycles and four-wheeled vehicles other than motorcycles. In addition to the resin, the gas-liquid separator 40 is preferably a lightweight non-ferrous metal.
【００２８】[0028]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、気液セパレータをボルト等の締結部
材で燃料タンクに取付けることで、溶接結合を止めたこ
とを特徴とし、溶接作業をともなわないので組立作業が
簡単になるとともに気液セパレータを熱に比較的弱い非
鉄金属や樹脂で構成することが可能となり、燃料タンク
の構成部品の軽量化が可能となる。The present invention has the following effects due to the above configuration. Claim 1 is characterized in that the gas-liquid separator is attached to the fuel tank with a fastening member such as a bolt to stop the welding connection. Since no welding work is involved, the assembly work is simplified and the gas-liquid separator is heated. Since it can be made of a relatively weak non-ferrous metal or resin, the weight of the components of the fuel tank can be reduced.
【００２９】請求項２は、気液セパレータを樹脂化した
ので、気液セパレータの軽量化が可能となる。In the second aspect, since the gas-liquid separator is made of resin, it is possible to reduce the weight of the gas-liquid separator.
【００３０】請求項３は、ブリーザパイプを気液セパレ
ータに嵌合結合するものであり、溶接作業をともなわな
いので組立作業が簡単になるとともに気液セパレータを
樹脂で構成することが可能となり、燃料タンクの構成部
品の軽量化が可能となる。According to a third aspect of the present invention, the breather pipe is fitted and coupled to the gas-liquid separator, and since the welding work is not involved, the assembling work is simplified and the gas-liquid separator can be made of resin, and the fuel is used. The weight of the components of the tank can be reduced.
【００３１】請求項４は、気液セパレータに逆止弁を一
体的に取付けたので、燃料タンク内の液面変動が気液セ
パレータ内部に与える影響をより効果的に抑えることが
できる。更に、本発明によれば気液セパレータをボルト
等で締結するだけであるから、逆止弁を何時でも都合の
よい時に組付け可能であり、例えば気液セパレータ単体
に予め組込むようにすれば、逆止弁は極めて容易に組込
むことができる。According to the present invention, since the check valve is integrally attached to the gas-liquid separator, it is possible to more effectively suppress the influence of the liquid level fluctuation in the fuel tank on the gas-liquid separator. Furthermore, according to the present invention, since the gas-liquid separator is simply fastened with bolts or the like, the check valve can be assembled at any time at a convenient time, for example, by pre-assembling the gas-liquid separator alone, The check valve can be installed very easily.
【図１】本発明に係る自動二輪車の側面図FIG. 1 is a side view of a motorcycle according to the present invention.
【図２】本発明に係る自動二輪車の背面図FIG. 2 is a rear view of the motorcycle according to the present invention.
【図３】本発明に係る自動二輪車の平面図FIG. 3 is a plan view of the motorcycle according to the present invention.
【図４】本発明に係る燃料タンクの断面図FIG. 4 is a sectional view of a fuel tank according to the present invention.
【図５】本発明に係る気液セパレータの平面図FIG. 5 is a plan view of a gas-liquid separator according to the present invention.
【図６】図５の６−６線断面図6 is a sectional view taken along line 6-6 of FIG.
【図７】図５の７−７線断面図7 is a sectional view taken along line 7-7 of FIG.
【図８】（ａ）は図５の８−８線断面図、（ｂ）は図８
（ａ）のｂ−ｂ線断面図8A is a sectional view taken along line 8-8 of FIG. 5, and FIG.
(A) bb sectional view taken on the line
【図９】図５の９−９線断面図9 is a sectional view taken along line 9-9 of FIG.
【図１０】本発明に係る気液セパレータの取付け図FIG. 10 is a mounting view of a gas-liquid separator according to the present invention.
【図１１】本発明に係る燃料タンクの組立説明図FIG. 11 is an explanatory view of assembly of a fuel tank according to the present invention.
【図１２】本発明の気液セパレータの別実施例図（図７
の別実施例図）FIG. 12 shows another embodiment of the gas-liquid separator of the present invention (FIG. 7).
Another embodiment of
【図１３】従来の燃料タンクと気液セパレータとブリー
ザパイプとを示す図FIG. 13 is a view showing a conventional fuel tank, a gas-liquid separator, and a breather pipe.
【図１４】図１３の燃料タンクの組立要領図FIG. 14 is an assembly procedure diagram of the fuel tank of FIG.
１…跨座型車両（自動二輪車）、３０…燃料タンク、３
４…給油口、３６…ブリーザパイプ、４０…気液セパレ
ータ、４１…上半体、４２…下半体、４３，４５…小
孔、５１，５３…ラバースリーブ、６２…締結部材（ネ
ック付きボルト）、６９…弁収納部、７０…逆止弁、７
１…リーク通路、７４…弁体。1 ... Straddle type vehicle (motorcycle), 30 ... Fuel tank, 3
4 ... Refueling port, 36 ... Breather pipe, 40 ... Gas-liquid separator, 41 ... Upper half body, 42 ... Lower half body, 43, 45 ... Small hole, 51, 53 ... Rubber sleeve, 62 ... Fastening member (bolt with neck) ), 69 ... Valve housing, 70 ... Check valve, 7
1 ... Leak passage, 74 ... Valve body.
Claims (4)
給油口を囲い且つ燃料タンクの内部に中空の気液セパレ
ータを配置し、この気液セパレータにブリーザパイプの
一端を連結した跨座型車両用燃料タンクのブリーザ構造
において、前記気液セパレータは締結部材にて燃料タン
クに固着されたことを特徴とする跨座型車両用燃料タン
クのブリーザ構造。1. A straddle type in which an oil filler opening is opened in an upper portion of a fuel tank, a hollow gas-liquid separator is disposed inside the fuel tank and surrounds the oil filler, and one end of a breather pipe is connected to the gas-liquid separator. A breather structure for a vehicle fuel tank, wherein the gas-liquid separator is fixed to the fuel tank with a fastening member.
であることを特徴とする請求項１記載の跨座型車両用燃
料タンクのブリーザ構造。2. The breather structure for a fuel tank for a straddle-type vehicle according to claim 1, wherein the gas-liquid separator is a resin separator.
に嵌合結合されたことを特徴とする請求項１又は請求項
２記載の跨座型車両用燃料タンクのブリーザ構造。3. The breather structure for a fuel tank for a straddle type vehicle according to claim 1, wherein the breather pipe is fitted and connected to a gas-liquid separator.
の外圧が急増した時に弁が閉じ、それ以外の時に弁が開
く逆止弁を一体的に取付けたことを特徴とする請求項１
又は請求項２記載の跨座型車両用燃料タンクのブリーザ
構造。4. The check valve is integrally attached to the gas-liquid separator, the valve closing when the external pressure of the gas-liquid separator suddenly increases and opening the valve at other times.
Alternatively, the breather structure for a fuel tank for a straddle-type vehicle according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10696494A JP3558227B2 (en) | 1994-05-20 | 1994-05-20 | Breather structure of fuel tank for straddle type vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10696494A JP3558227B2 (en) | 1994-05-20 | 1994-05-20 | Breather structure of fuel tank for straddle type vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07309276A true JPH07309276A (en) | 1995-11-28 |
| JP3558227B2 JP3558227B2 (en) | 2004-08-25 |
Family
ID=14447011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10696494A Expired - Fee Related JP3558227B2 (en) | 1994-05-20 | 1994-05-20 | Breather structure of fuel tank for straddle type vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3558227B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076662A (en) * | 2008-09-26 | 2010-04-08 | Honda Motor Co Ltd | Motorcycle |
-
1994
- 1994-05-20 JP JP10696494A patent/JP3558227B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076662A (en) * | 2008-09-26 | 2010-04-08 | Honda Motor Co Ltd | Motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3558227B2 (en) | 2004-08-25 |
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