JP2006076570A - Fuel supply device of motorcycle - Google Patents

Fuel supply device of motorcycle Download PDF

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JP2006076570A
JP2006076570A JP2005350762A JP2005350762A JP2006076570A JP 2006076570 A JP2006076570 A JP 2006076570A JP 2005350762 A JP2005350762 A JP 2005350762A JP 2005350762 A JP2005350762 A JP 2005350762A JP 2006076570 A JP2006076570 A JP 2006076570A
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fuel
fuel tank
motorcycle
suction
pump
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JP4211778B2 (en
JP2006076570A5 (en
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Yuji Sonoda
祐司 園田
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Suzuki Motor Corp
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Suzuki Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce the invalid residual quantity of a fuel tank to enlarge the capacity of the fuel tank, while improving a design property and layout property around the fuel tank. <P>SOLUTION: A suction in part 28 of a fuel pump 13 is provided in an external part of the fuel tank 11, a suction out part 31 communicating with a lowest part of the fuel tank 11 from the external part is provided in the external part of the fuel tank 11, and a section between the suction in part 28 and the suction out part 31 is connected by an external part pipe passage 32. The fuel tank 11 is provided across a pair of left and right frame structural members (an upper pipe 16) constituting a front half part of a vehicle body frame. The fuel pump 13 is provided on a bottom face 11b of the fuel tank 11 to position it between the left and right frame structural members 16 when viewed in the forward and backward directions of a vehicle. A lower part of the fuel pump 13 protrudes downward from the bottom face 11b, and the suction in part 28 is provided in a protruding part 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、燃料タンク内部に設置した燃料ポンプにより燃料タンク内部の燃料をエンジン側に供給する自動二輪車の燃料供給装置に関するものである。   The present invention relates to a fuel supply device for a motorcycle that supplies fuel in a fuel tank to an engine side by a fuel pump installed in the fuel tank.

自動二輪車においては、一般にエンジンの上方、かつハンドルバーと着座シートの間に燃料タンクが設置されている。この燃料タンク内の燃料を燃料ポンプにより気化器や燃料噴射装置に供給する場合には、限られたスペースの関係で燃料ポンプが燃料タンクの内部に設置されることが多い。この場合、燃料ポンプを燃料タンクの最低部に設置しないと燃料タンク内の燃料を全部使い切ることが出来なくなり、燃料の無効残量分が生じてしまう。燃料タンクの最底部に燃料ポンプを設置した自動二輪車に、特開２０００−７２０７４号公報（例えば、特許文献１参照）がある。
特開２０００−７２０７４号公報 In a motorcycle, a fuel tank is generally installed above an engine and between a handlebar and a seat. When the fuel in the fuel tank is supplied to the carburetor or the fuel injection device by the fuel pump, the fuel pump is often installed inside the fuel tank because of limited space. In this case, if the fuel pump is not installed at the lowest part of the fuel tank, the fuel in the fuel tank cannot be completely used up, resulting in an ineffective remaining amount of fuel. Japanese Unexamined Patent Publication No. 2000-72074 (see, for example, Patent Document 1) is a motorcycle having a fuel pump installed at the bottom of a fuel tank.
JP 2000-72074 A

従来の自動二輪車では、燃料ポンプを燃料タンクの最低部に設置しなければならないという制約があるため、燃料タンク回りのデザイン性やレイアウト性が低下しやすく、燃料ポンプの設置が自動二輪車の設計を困難にする原因となっていた。   In conventional motorcycles, there is a restriction that the fuel pump must be installed at the lowest part of the fuel tank, so the design and layout around the fuel tank are likely to deteriorate, and the installation of the fuel pump will make the design of the motorcycle It was a cause of difficulty.

特に、自動二輪車の車体フレーム前半部が左右一対のフレーム構造材により構成され、その上部に燃料タンクが設置されている場合には、燃料タンクの直下に位置するフレーム構造材に阻害されて燃料ポンプの設置が困難になるとともに、燃料タンクの容量が小さくなりやすい。また、燃料タンクの全高や全幅を大きくすることにより燃料タンクの容量を増大させようとすると、ライダーのライディングポジションが悪化したり、自動二輪車およびライダーの前面投影面積が増大して空気抵抗が増大するといった別な問題が生じる。   In particular, when the front half of the body frame of a motorcycle is composed of a pair of left and right frame structural members and a fuel tank is installed on the upper part, the fuel pump is obstructed by the frame structural member located directly below the fuel tank. Is difficult to install, and the capacity of the fuel tank tends to be small. Also, if the fuel tank capacity is increased by increasing the overall height and width of the fuel tank, the rider's riding position will be deteriorated, and the projected area of the motorcycle and the rider will increase, resulting in increased air resistance. Another problem arises.

本発明に係る自動二輪車の燃料供給装置は、上述した事情を考慮したもので、燃料タンクの無効残量を減少させ、燃料タンク回りのデザイン性とレイアウト性を向上させるとともに、燃料タンクの容量拡大と、燃料残量が少ない時の急加速時における燃料切れを防止する自動二輪車の燃料供給装置を提供することを目的とする。   The fuel supply device for a motorcycle according to the present invention takes the above-mentioned circumstances into consideration, reduces the ineffective remaining amount of the fuel tank, improves the design and layout around the fuel tank, and expands the capacity of the fuel tank. Another object of the present invention is to provide a motorcycle fuel supply device that prevents fuel shortage during sudden acceleration when the remaining amount of fuel is low.

本発明に係る自動二輪車の燃料供給装置は、上述した課題を解決するために、請求項１に記載したように、燃料タンクの内部に設置した燃料ポンプにより燃料タンク内の燃料をエンジン側に供給するように構成された自動二輪車の燃料供給装置において、上記燃料ポンプの吸入部を燃料タンクの外部に開設する一方、外部から燃料タンクの最低部に通じる吸出部を燃料タンクの外部に開設し、上記吸入部と吸出部との間を外部管路で接続したことを特徴とするものである。   In order to solve the above-described problem, a fuel supply device for a motorcycle according to the present invention supplies the fuel in the fuel tank to the engine side by a fuel pump installed inside the fuel tank. In the motorcycle fuel supply device configured to be configured, the suction portion of the fuel pump is opened outside the fuel tank, while the suction portion communicating from the outside to the lowest portion of the fuel tank is opened outside the fuel tank, The suction part and the suction part are connected by an external conduit.

この構成によれば、燃料ポンプの配置場所に関わらず常に燃料タンクの最低部から燃料が吸い出されるため無効残量が減少し、しかも燃料ポンプの配置自由度が増すので燃料タンク回りのデザイン性とレイアウト性が向上する。   According to this configuration, the fuel is always drawn out from the lowest part of the fuel tank regardless of the location of the fuel pump, so the invalid remaining amount is reduced, and the degree of freedom in the arrangement of the fuel pump is increased. And layout is improved.

また、本発明に係る自動二輪車の燃料供給装置は、請求項２に記載したように、自動二輪車の車体フレーム前半部が左右一対のフレーム構造材により構成されている場合に、前記燃料タンクを上記フレーム構造材の上に跨設し、車両前後方向視で前記燃料ポンプを左右のフレーム構造材の間に位置するように燃料タンクの底面に設置するとともに、燃料ポンプの下部を燃料タンクの底面より下方に突出させ、この突出部に前記吸入部を設けたものである。   Further, according to the fuel supply device for a motorcycle according to the present invention, when the front half of the body frame of the motorcycle is constituted by a pair of left and right frame structural members, the fuel tank is provided as described above. The fuel pump is installed on the bottom surface of the fuel tank so as to be positioned between the left and right frame structure materials as viewed in the vehicle longitudinal direction, and the lower part of the fuel pump is disposed below the bottom surface of the fuel tank. It protrudes downward, and the suction part is provided in this protrusion.

上記構成とすれば、左右一対のフレーム構造材に阻害されることなく燃料タンクの底面に燃料ポンプを低い高さで設置できるので、燃料タンク回りのデザイン性とレイアウト性が向上する。また、フレーム構造材の上に跨設される燃料タンクにはフレーム構造材の両側方に位置するオーバーハング部が形成されるため、燃料タンクの全高や全幅を大きくすることなく容量を拡大することができる。   With the above configuration, the fuel pump can be installed at a low height on the bottom surface of the fuel tank without being obstructed by the pair of left and right frame structural members, so that the design and layout around the fuel tank can be improved. In addition, since the fuel tanks straddling the frame structure material are formed with overhangs located on both sides of the frame structure material, the capacity can be increased without increasing the overall height or width of the fuel tank. Can do.

さらに、本発明に係る自動二輪車の燃料供給装置は、請求項３に記載したように、前記燃料タンクの最後部を燃料タンクの最も低い部分の一つとし、この部分の底面上に上方に開口する集液カップを設置し、この集液カップの底部から燃料タンクの外部に通じるように前記吸出部を設けたものである。こうした場合、燃料残量が少ない時における急加速時には燃料タンク内の燃料が後方の集液カップへ流れるため、燃料切れが防止される。   Furthermore, in the motorcycle fuel supply device according to the present invention, the rearmost part of the fuel tank is one of the lowest parts of the fuel tank, and is opened upward on the bottom surface of this part. A liquid collecting cup is provided, and the suction portion is provided so as to communicate with the outside of the fuel tank from the bottom of the liquid collecting cup. In such a case, the fuel in the fuel tank flows to the liquid collecting cup at the rear at the time of rapid acceleration when the remaining amount of fuel is low.

そして、本発明に係る自動二輪車の燃料供給装置は、請求項４に記載したように、車体側面視で左右一対のフレーム構造材を燃料タンクの最後部よりも下方に配設し、この最後部の底面を略平面状にして前記集液カップを設置したものである。これにより、燃料タンク最後部の高さをより低くして集液カップへの燃料の流れを良くし、燃料残量が少ない時における燃料切れを防止することができる。   In the motorcycle fuel supply device according to the present invention, the pair of left and right frame structural members are disposed below the rearmost part of the fuel tank as viewed from the side of the vehicle body. The liquid collecting cup is installed with the bottom surface of the liquid crystal being substantially flat. Thereby, the height of the last part of the fuel tank can be lowered to improve the flow of fuel to the liquid collecting cup, and fuel shortage can be prevented when the remaining amount of fuel is low.

また、本発明に係る自動二輪車の燃料供給装置は、請求項５に記載したように、車体側面視で前記集液カップを前後輪の略中間位置に配置した。こうすれば、走行時における車体の上下揺動量が最も少ない場所に集液カップが設置されるので、集液カップの燃料保持性が良くなり、燃料残量が少ない時における燃料切れが一層効果的に防止される。   In the motorcycle fuel supply apparatus according to the present invention, the liquid collection cup is disposed at a substantially intermediate position between the front and rear wheels in a side view of the vehicle body. In this way, since the liquid collection cup is installed in a place where the amount of vertical swing of the vehicle body when traveling is minimized, the fuel retention of the liquid collection cup is improved, and running out of fuel when the remaining amount of fuel is low is more effective. To be prevented.

さらに、本発明に係る自動二輪車の燃料供給装置は、請求項６に記載したように、前記フレーム構造材の両側方に位置する前記燃料タンクのオーバーハング部の少なくとも片方の最低部に吸出部を設け、この吸出部と燃料ポンプの吸入部との間を外部管路で接続し、上記外部管路をフレーム構造材の下方にくぐらせた。これにより、燃料タンク回りのデザイン性とレイアウト性が向上し、燃料タンクの容量拡大も可能になる。   Furthermore, the motorcycle fuel supply device according to the present invention is characterized in that, as described in claim 6, a suction portion is provided at least at one of the lowest portions of the overhang portion of the fuel tank located on both sides of the frame structure material. The suction part and the suction part of the fuel pump were connected by an external pipe, and the external pipe was passed under the frame structure material. As a result, the design and layout around the fuel tank are improved, and the capacity of the fuel tank can be expanded.

本発明に係る自動二輪車の燃料供給装置は、燃料タンクの内部に設置した燃料ポンプにより燃料タンク内の燃料をエンジン側に供給するように構成された自動二輪車の燃料供給装置において、上記燃料ポンプの吸入部を燃料タンクの外部に開設する一方、外部から燃料タンクの最低部に通じる吸出部を燃料タンクの外部に開設して上記吸入部と吸出部との間を外部管路で接続したものであり、このように構成すれば燃料タンクの無効残量を減少させるとともに燃料タンク回りのデザイン性とレイアウト性を大きく向上させることができる。   A fuel supply device for a motorcycle according to the present invention is a fuel supply device for a motorcycle configured to supply the fuel in the fuel tank to the engine side by a fuel pump installed inside the fuel tank. The suction part is opened outside the fuel tank, while the suction part that leads from the outside to the lowest part of the fuel tank is opened outside the fuel tank, and the suction part and the suction part are connected by an external pipe. With such a configuration, the ineffective remaining amount of the fuel tank can be reduced and the design and layout around the fuel tank can be greatly improved.

本発明に係る自動二輪車の燃料供給装置の実施の形態について、添付図面を参照しながら説明する。   An embodiment of a motorcycle fuel supply apparatus according to the present invention will be described with reference to the accompanying drawings.

図１は、本発明に係る燃料供給装置が適用された自動二輪車の一例を示す左側面図である。   FIG. 1 is a left side view showing an example of a motorcycle to which a fuel supply device according to the present invention is applied.

この自動二輪車１は、その車体フレーム２の前半部分にエンジン３が搭載され、その後方に燃料噴射装置４とエアクリーナー５が設置される一方、車体フレーム２の前頭部に前輪６を支持するフロントフォーク７がハンドルバー８と共に軸支され、車体フレーム２の中央下部に後輪９を支持するスイングアーム１０が軸支されている。そして、エンジン３の上方に燃料タンク１１が設置され、その後方に着座シート１２が載置されている。   The motorcycle 1 has an engine 3 mounted on the front half of a body frame 2, and a fuel injection device 4 and an air cleaner 5 are installed behind the engine 3, while a front wheel 6 is supported on the front head of the body frame 2. A front fork 7 is pivotally supported together with a handlebar 8, and a swing arm 10 that supports a rear wheel 9 is pivotally supported at the lower center of the body frame 2. A fuel tank 11 is installed above the engine 3, and a seating seat 12 is placed behind the fuel tank 11.

燃料タンク１１の内部には燃料ポンプ１３と集液カップ１４が設置され、燃料タンク１１内の燃料が燃料ポンプ１３によりエンジン３の燃料噴射装置４に供給される。本発明に係る第１実施形態の燃料供給装置は燃料タンク１１と燃料ポンプ１３と集液カップ１４を備えて構成されている。図２は燃料供給装置を拡大した左側面図であり、図３の（ａ）と（ｂ）はそれぞれ図２のＩＩＩａ−ＩＩＩａ線、ＩＩＩｂ−ＩＩＩｂ線に沿う縦断面図である。   A fuel pump 13 and a collecting cup 14 are installed inside the fuel tank 11, and fuel in the fuel tank 11 is supplied to the fuel injection device 4 of the engine 3 by the fuel pump 13. The fuel supply device according to the first embodiment of the present invention includes a fuel tank 11, a fuel pump 13, and a liquid collection cup 14. 2 is an enlarged left side view of the fuel supply device, and FIGS. 3A and 3B are longitudinal sectional views taken along lines IIIa-IIIa and IIIb-IIIb in FIG. 2, respectively.

ところで、車体フレーム２の前半部を構成するのは左右一対のアッパーパイプ１６であり、燃料タンク１１はこれら２本のアッパーパイプ１６の上を跨ぐように跨設されている。したがって、図３（ａ）に示すように燃料タンク１１の車両前後方向視での縦断面形状は略馬蹄形状をしており、燃料タンク１１の左右両側下部には左右のアッパーパイプ１６の外側方に位置するオーバーハング部１１ａがある。また、燃料タンク１１の頂部には給油キャップを設けるための給油開口部１７が形成されている。   By the way, it is a pair of left and right upper pipes 16 that constitutes the front half of the vehicle body frame 2, and the fuel tank 11 is straddled over the two upper pipes 16. Therefore, as shown in FIG. 3A, the longitudinal cross-sectional shape of the fuel tank 11 in the vehicle front-rear direction is substantially horseshoe-shaped, and the left and right lower portions of the fuel tank 11 are located outward of the left and right upper pipes 16. There is an overhang portion 11a located at the position. A fuel supply opening 17 for providing a fuel supply cap is formed at the top of the fuel tank 11.

燃料ポンプ１３は、車両前後方向視で左右のアッパーパイプ１６の間に位置するように燃料タンク１１の中間部の底面１１ｂに設置されている。この部分にはポンプ取付口１８が穿設されており、その周囲上面に環状のナットプレート１９が固着されている。一方、燃料ポンプ１３の縦長のポンプ本体２１の下寄りには取付フランジ２２が設けられており、この取付フランジ２２の下面に、上方に開口する椀状に形成されたロアーハウジング２３の取付フランジ２４が重ねられ、２枚の取付フランジ２２，２４がポンプ取付口１８の下部に当てがわれて下方から複数の取付ボルト２５がナットプレート１９のめねじに締結されることにより、燃料ポンプ１３全体が燃料タンク１１の中間部の底面１１ｂに固定される。   The fuel pump 13 is installed on the bottom surface 11b of the middle portion of the fuel tank 11 so as to be positioned between the left and right upper pipes 16 when viewed in the vehicle longitudinal direction. A pump mounting port 18 is formed in this portion, and an annular nut plate 19 is fixed to the upper surface around the pump mounting port 18. On the other hand, a mounting flange 22 is provided below the vertically long pump body 21 of the fuel pump 13, and a mounting flange 24 of a lower housing 23 formed in a bowl shape opening upward on the lower surface of the mounting flange 22. And the two mounting flanges 22 and 24 are applied to the lower part of the pump mounting port 18 and a plurality of mounting bolts 25 are fastened to the female screw of the nut plate 19 from below, whereby the entire fuel pump 13 is The fuel tank 11 is fixed to the bottom surface 11b of the middle part.

このため、燃料ポンプ１３の下部をなすロアーハウジング２３が燃料タンク１１の底面１１ｂより下方に突出して外部に露出しており、このロアーハウジング２３の内部にポンプ本体２１の吸入フィルター２６が入り込んでいる。なお、ロアーハウジング２３の内部空間は燃料タンク１１の内部空間から隔絶されている。   For this reason, the lower housing 23 which forms the lower part of the fuel pump 13 protrudes downward from the bottom surface 11 b of the fuel tank 11 and is exposed to the outside, and the suction filter 26 of the pump main body 21 enters the lower housing 23. . The inner space of the lower housing 23 is isolated from the inner space of the fuel tank 11.

また、ロアーハウジング２３の底部には、図３に示すように、燃料ポンプ１３の吸入部２８が開設されている。吸入部２８は例えばユニオン状に延出され、その先端が左斜め後方に指向している。なお、燃料タンク１１のポンプ取付口１８と燃料ポンプ１３の取付フランジ２２と取付フランジ２４との間には図示しないパッキン材が介装されて燃料漏れが防止される。   Further, a suction part 28 of the fuel pump 13 is opened at the bottom of the lower housing 23 as shown in FIG. The suction portion 28 extends, for example, in a union shape, and its tip is directed diagonally left rearward. A packing material (not shown) is interposed between the pump mounting opening 18 of the fuel tank 11 and the mounting flange 22 and mounting flange 24 of the fuel pump 13 to prevent fuel leakage.

一方、燃料タンク１１の最後部は、図２に示すように、オーバーハング部１１ａと共に燃料タンク１１の最も低い部分の一つとされている。車体側面視で左右一対のフレーム構造材は燃料タンク１１の最後部よりも下方を通るように配設されており、燃料タンク１１最後部の底面１１ｃは略平面状に形成され、この略平面状の部分の上に集液カップ１４が設置されている。図１に示すように、集液カップ１４は車体側面視で前輪６と後輪９の略中間位置に位置している。   On the other hand, as shown in FIG. 2, the rearmost portion of the fuel tank 11 is one of the lowest portions of the fuel tank 11 together with the overhang portion 11a. The pair of left and right frame structural members are disposed so as to pass below the rearmost part of the fuel tank 11 in a side view of the vehicle body, and the bottom surface 11c of the rearmost part of the fuel tank 11 is formed in a substantially planar shape. The liquid collection cup 14 is installed on the part. As shown in FIG. 1, the liquid collection cup 14 is located at a substantially intermediate position between the front wheel 6 and the rear wheel 9 in a side view of the vehicle body.

集液カップ１４は上方に開口するカップであり、ブラケット２９を介して燃料タンク１１最後部の底面１１ｃ上に固定され、その側面に縦長の燃料流入穴３０が穿設されている。また、集液カップ１４の底部からは燃料タンク１１の外部に通じるように吸出部３１が設けられている。この吸出部３１も燃料ポンプ１３の吸入部２８と同様にユニオン状に形成されており、その先端が左斜め前方に指向している。なお、車体側面視で吸出部３１は集液カップ１４底部の前寄りに位置付けられ、燃料流入穴３０は集液カップ１４の後寄りに位置付けられている。   The liquid collection cup 14 is a cup that opens upward, is fixed on the bottom surface 11c of the rearmost part of the fuel tank 11 via a bracket 29, and has a vertically long fuel inflow hole 30 formed in the side surface. A suction part 31 is provided from the bottom of the liquid collection cup 14 so as to communicate with the outside of the fuel tank 11. The suction part 31 is also formed in a union like the suction part 28 of the fuel pump 13, and its tip is directed obliquely left frontward. The suction part 31 is positioned in front of the bottom of the liquid collection cup 14 and the fuel inflow hole 30 is positioned in the rear of the liquid collection cup 14 in a side view of the vehicle body.

そして、この吸出部３１と燃料ポンプ１３の吸入部２８との間が外部管路３２で接続されている。外部管路３２は例えばゴムホースであり、左側のアッパーパイプ１６の左側方を通るように配設される。   The suction part 31 and the suction part 28 of the fuel pump 13 are connected by an external conduit 32. The external conduit 32 is a rubber hose, for example, and is disposed so as to pass through the left side of the left upper pipe 16.

第１実施形態の燃料供給装置は以上のように構成されている。燃料タンク１１の給油開口部１７から燃料が給油されると、燃料ポンプ１３のポンプ本体２１や集液カップ１４が燃料の液面下に没する。そして、燃料ポンプ１３が作動すると、吸引圧によりロアーハウジング２３の内部空間が負圧になるため、燃料タンク１１内の燃料が、図３（ａ）および（ｂ）に示すように、集液カップ１４→吸出部３１→外部管路３２→吸入部２８の順に流れてロアーハウジング２３内に流入し、吸入フィルター２６に濾過されてからポンプ本体２１に吸入され、ポンプ本体２１に設けられた図示しない吐出部から吐出されて燃料噴射装置４に圧送される。   The fuel supply device of the first embodiment is configured as described above. When fuel is supplied from the fuel supply opening 17 of the fuel tank 11, the pump body 21 and the liquid collection cup 14 of the fuel pump 13 are submerged below the fuel level. When the fuel pump 13 is activated, the internal space of the lower housing 23 becomes negative due to the suction pressure, so that the fuel in the fuel tank 11 flows into the liquid collection cup as shown in FIGS. 3 (a) and 3 (b). 14 → suction portion 31 → external pipe 32 → suction portion 28, flows into the lower housing 23, is filtered by the suction filter 26, is sucked into the pump body 21, and is provided in the pump body 21 (not shown) It is discharged from the discharge part and is pumped to the fuel injection device 4.

なお、燃料タンク１１内における燃料残量が少なくなり、燃料の液面が集液カップ１４の上縁を下回っても、残り少ない燃料が燃料流入穴３０から集液カップ１４内に流入するため、燃料切れが遅延される。また、この時に自動二輪車１が急減速して慣性の法則により燃料タンク１１内の燃料が前方に移動しても、集液カップ１４の内部に少量の燃料が保持されるため燃料切れが起きにくい。車体側面視で集液カップ１４の燃料流入穴３０は吸出部３１よりも後方に位置しているため、急減速時における集液カップ１４内の燃料は燃料流入穴３０から流出することなく吸出部３１から吸い出される。   Even if the remaining amount of fuel in the fuel tank 11 is reduced and the liquid level of the fuel falls below the upper edge of the collecting cup 14, the remaining fuel flows into the collecting cup 14 from the fuel inflow hole 30. Cutting is delayed. At this time, even if the motorcycle 1 decelerates suddenly and the fuel in the fuel tank 11 moves forward according to the law of inertia, a small amount of fuel is retained in the liquid collection cup 14 so that fuel shortage does not occur easily. . Since the fuel inflow hole 30 of the liquid collection cup 14 is located behind the suction part 31 in a side view of the vehicle body, the fuel in the liquid collection cup 14 at the time of sudden deceleration does not flow out of the fuel inflow hole 30. 31 is sucked out.

以上のように構成された燃料供給装置は、燃料ポンプ１３の吸入部２８を燃料タンク１１の外部に開設する一方、外部から燃料タンク１１の最低部に通じる吸出部３１を開設し、吸入部２８と吸出部３１との間を外部管路３２で接続したものであるため、燃料ポンプ１３が燃料タンク１１の最低部よりも高位置に設けられているにも関わらず、常に燃料タンク１１の最低部から燃料が吸い出されて燃料ポンプ１３に供給される。   The fuel supply apparatus configured as described above opens the suction portion 28 of the fuel pump 13 outside the fuel tank 11, and opens the suction portion 31 that communicates from the outside to the lowest portion of the fuel tank 11. Since the fuel pump 13 is provided at a position higher than the lowest part of the fuel tank 11, the lowest part of the fuel tank 11 is always provided. The fuel is sucked out from the section and supplied to the fuel pump 13.

このため、燃料タンク１１の無効残量を減少させることができる。しかも、燃料ポンプ１３を何処に設置しても良くなるため、燃料ポンプ１３の配置自由度が増し、燃料タンク１１回りのデザイン性とレイアウト性を飛躍的に向上させることができる。   For this reason, the invalid remaining amount of the fuel tank 11 can be reduced. In addition, since the fuel pump 13 can be installed anywhere, the degree of freedom of arrangement of the fuel pump 13 is increased, and the design and layout around the fuel tank 11 can be dramatically improved.

また、車体フレーム２の前半部を構成する左右一対のアッパーパイプ１６を跨ぐ形で燃料タンク１１を設置するとともに、車両前後方向視で燃料ポンプ１３を左右のアッパーパイプ１６の間に位置するように燃料タンク１１の底面１１ｂに設置し、燃料ポンプ１３の下部（ロアーハウジング２３）を燃料タンク１１の底面１１ｂより下方に突出させ、この部分に吸入部２８を設けたことから、アッパーパイプ１６に阻害されることなく燃料ポンプ１３を低い高さで設置して燃料タンク１１回りのデザイン性とレイアウト性を一層向上させることができる。   Further, the fuel tank 11 is installed so as to straddle the pair of left and right upper pipes 16 constituting the front half of the vehicle body frame 2, and the fuel pump 13 is positioned between the left and right upper pipes 16 when viewed from the front and rear of the vehicle. Since it is installed on the bottom surface 11 b of the fuel tank 11 and the lower part (lower housing 23) of the fuel pump 13 projects downward from the bottom surface 11 b of the fuel tank 11, and the suction part 28 is provided in this part, the upper pipe 16 is obstructed. Accordingly, the design and layout around the fuel tank 11 can be further improved by installing the fuel pump 13 at a low height.

しかも、燃料タンク１１にはアッパーパイプ１６の両側方に位置する一対のオーバーハング部１１ａが形成されるため、燃料タンク１１の全高や全幅を大きくすることなく燃料タンク１１の容量を拡大することができ、これにより自動二輪車１のデザイン性、空力特性、ライディング性等を大幅に向上させることができる。   Moreover, since the fuel tank 11 is formed with a pair of overhang portions 11a located on both sides of the upper pipe 16, the capacity of the fuel tank 11 can be increased without increasing the overall height or width of the fuel tank 11. Thus, the design, aerodynamic characteristics, riding performance, etc. of the motorcycle 1 can be greatly improved.

さらに、燃料タンク１１の最後部を燃料タンク１１の最も低い部分の一つとし、この部分の底面１１ｃ上に集液カップ１４を設置し、この集液カップ１４の底部から燃料タンク１１の外部に通じるように吸出部３１を設けたので、燃料を安定的に供給し続けることができるとともに、燃料残量が少ない時に自動二輪車１が急加速して燃料タンク１１内の燃料が後方に片寄っても、片寄った燃料が集液カップ１４内に流れ込むので燃料切れが防止される。   Furthermore, the last part of the fuel tank 11 is set as one of the lowest parts of the fuel tank 11, and a liquid collection cup 14 is installed on the bottom surface 11 c of this part, and from the bottom of the liquid collection cup 14 to the outside of the fuel tank 11. Since the suction portion 31 is provided so as to communicate with the fuel, the fuel can be stably supplied, and even when the remaining amount of fuel is low, the motorcycle 1 suddenly accelerates and the fuel in the fuel tank 11 is shifted backward. Since the offset fuel flows into the liquid collecting cup 14, fuel shortage is prevented.

また、車体側面視でアッパーパイプ１６を燃料タンク１１の最後部よりも下方に配設し、この最後部の底面１１ｃを略平面状にして集液カップ１４を設置したため、燃料タンク１１最後部の高さをより低くして集液カップ１４への燃料の流れを良くし、燃料残量が少ない時における燃料切れを一段と有効に防止することができる。   Further, the upper pipe 16 is disposed below the rearmost portion of the fuel tank 11 in a side view of the vehicle body, and the liquid collecting cup 14 is installed with the bottom surface 11c of the rearmost portion being substantially flat, so that the rearmost portion of the fuel tank 11 is disposed. The height can be further lowered to improve the flow of fuel to the liquid collection cup 14, and fuel shortage can be more effectively prevented when the amount of remaining fuel is low.

ところで、車体側面視で前後輪６，９の略中間位置は自動二輪車１の走行時における車体の上下揺動量が最小になる場所であるが、この場所に集液カップ１４を配置したため、集液カップ１４の揺動量を小さくしてその燃料保持性を向上させ、燃料残量が少ない時における燃料切れをより一層効果的に防止することができる。   By the way, a substantially intermediate position between the front and rear wheels 6 and 9 in a side view of the vehicle body is a place where the amount of vertical swing of the vehicle body when the motorcycle 1 is traveling is minimized. The amount of rocking of the cup 14 can be reduced to improve its fuel retention, and it is possible to more effectively prevent running out of fuel when the remaining amount of fuel is low.

図４は本発明に係る燃料供給装置の第２実施形態を示す縦断面図である。この図において、アッパーパイプ１６と燃料タンク１１と燃料ポンプ１３等の基本構造は第１実施形態のものと同様であるため、各部には同一符号を付して説明を省略する。この第２実施形態において、燃料タンク１１に設けられる吸出部３５は、少なくとも左右片方（両方でもよい）のオーバーハング部１１ａの最低部に設けられており、この吸出部３５と燃料ポンプ１３の吸入部２８との間を接続する外部管路３７が例えば左側のアッパーパイプ１６の下方をくぐるように配設されている。   FIG. 4 is a longitudinal sectional view showing a second embodiment of the fuel supply apparatus according to the present invention. In this figure, since the basic structure of the upper pipe 16, the fuel tank 11, the fuel pump 13, and the like is the same as that of the first embodiment, the same reference numerals are given to the respective parts and the description thereof is omitted. In the second embodiment, the suction part 35 provided in the fuel tank 11 is provided in at least the lowest part of the left and right (or both) overhang parts 11 a, and the suction part 35 and the suction of the fuel pump 13 are provided. An external pipe line 37 that connects the section 28 is disposed so as to pass under the left upper pipe 16, for example.

こうした場合も、第１実施形態の場合と同様に燃料ポンプ１３の配置場所が問われなくなるため、燃料タンク１１回りのデザイン性とレイアウト性を向上させるとともに、オーバーハング部１１ａを下方に延長して燃料タンク１１の容量を拡大することができる。   In such a case as well, in the same way as in the first embodiment, the arrangement location of the fuel pump 13 is not questioned. Therefore, the design and layout around the fuel tank 11 are improved, and the overhang portion 11a is extended downward. The capacity of the fuel tank 11 can be increased.

本発明に係る燃料供給装置が適用された自動二輪車の一例を示す左側面図。1 is a left side view showing an example of a motorcycle to which a fuel supply device according to the present invention is applied. 燃料供給装置を拡大した左側面図。The left view which expanded the fuel supply apparatus. 本発明に係る自動二輪車の燃料供給装置の第１実施形態を示すもので、（ａ）は図２のＩＩＩａ−ＩＩＩａ線に沿う縦断面図、（ｂ）は図２のＩＩＩｂ−ＩＩＩｂ線に沿う縦断面図。1 shows a first embodiment of a motorcycle fuel supply apparatus according to the present invention, in which (a) is a longitudinal sectional view taken along line IIIa-IIIa in FIG. 2, and (b) is taken along line IIIb-IIIb in FIG. FIG. 本発明に係る自動二輪車の燃料供給装置の第２実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 2nd Embodiment of the fuel supply apparatus of the motorcycle which concerns on this invention.

符号の説明Explanation of symbols

１ 自動二輪車
２ 車体フレーム
３ エンジン
４ 燃料噴射装置
６ 前輪
８ 後輪
１１ 燃料タンク
１１ａ オーバーハング部
１１ｂ，１１ｃ 燃料タンクの底面
１３ 燃料ポンプ
１４ 集液カップ
１６ 左右一対のフレーム構造材であるアッパーパイプ
２３ 燃料ポンプの下部をなすロアーハウジング
２８ 吸入部
３０ 燃料流入穴
３１，３５ 吸出部
３２ 外部管路 DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 3 Engine 4 Fuel injection apparatus 6 Front wheel 8 Rear wheel 11 Fuel tank 11a Overhang part 11b, 11c Bottom face of fuel tank 13 Fuel pump 14 Liquid collection cup 16 Upper pipe 23 which is a pair of left and right frame structural members Lower housing 28 forming lower part of fuel pump Suction part 30 Fuel inflow holes 31, 35 Suction part 32 External pipe

Claims (6)

燃料タンクの内部に設置した燃料ポンプにより燃料タンク内の燃料をエンジン側に供給するように構成された自動二輪車の燃料供給装置において、上記燃料ポンプの吸入部を燃料タンクの外部に開設する一方、外部から燃料タンクの最低部に通じる吸出部を燃料タンクの外部に開設し、上記吸入部と吸出部との間を外部管路で接続したことを特徴とする自動二輪車の燃料供給装置。 In a motorcycle fuel supply apparatus configured to supply fuel in a fuel tank to an engine side by a fuel pump installed inside the fuel tank, the suction part of the fuel pump is opened outside the fuel tank, A fuel supply device for a motorcycle, wherein a suction portion that leads from the outside to the lowest portion of the fuel tank is opened outside the fuel tank, and the suction portion and the suction portion are connected by an external conduit. 自動二輪車の車体フレーム前半部が左右一対のフレーム構造材により構成されている場合に、前記燃料タンクを上記フレーム構造材の上に跨設し、車両前後方向視で前記燃料ポンプを左右のフレーム構造材の間に位置するように燃料タンクの底面に設置するとともに、燃料ポンプの下部を燃料タンクの底面より下方に突出させ、この突出部に前記吸入部を設けた請求項１に記載の自動二輪車の燃料供給装置。 When the front half of the body frame of the motorcycle is composed of a pair of left and right frame structural members, the fuel tank is straddled over the frame structural members, and the fuel pump is viewed from the left and right as viewed in the vehicle longitudinal direction. The motorcycle according to claim 1, wherein the motorcycle is installed on the bottom surface of the fuel tank so as to be positioned between the members, and a lower portion of the fuel pump protrudes downward from the bottom surface of the fuel tank, and the suction portion is provided in the protruding portion. Fuel supply system. 前記燃料タンクの最後部を燃料タンクの最も低い部分の一つとし、この部分の底面上に上方に開口する集液カップを設置し、この集液カップの底部から燃料タンクの外部に通じるように前記吸出部を設けた請求項１に記載の自動二輪車の燃料供給装置。 Let the last part of the fuel tank be one of the lowest parts of the fuel tank, and install a liquid collection cup that opens upward on the bottom of this part, and communicate with the outside of the fuel tank from the bottom of this liquid collection cup The motorcycle fuel supply device according to claim 1, wherein the suction portion is provided. 車体側面視で左右一対のフレーム構造材を燃料タンクの最後部よりも下方に配設し、この最後部の底面を略平面状にして前記集液カップを設置した請求項３に記載の自動二輪車の燃料供給装置。 The motorcycle according to claim 3, wherein the pair of left and right frame structural members are disposed below the rearmost part of the fuel tank in a side view of the vehicle body, and the collecting cup is installed with the bottom surface of the rearmost part being substantially flat. Fuel supply system. 車体側面視で前記集液カップを前後輪の略中間位置に配置した請求項３または４に記載の自動二輪車の燃料供給装置。 The motorcycle fuel supply device according to claim 3 or 4, wherein the liquid collection cup is disposed at a substantially intermediate position between the front and rear wheels in a side view of the vehicle body. 前記フレーム構造材の両側方に位置する前記燃料タンクのオーバーハング部の少なくとも片方の最低部に吸出部を設け、この吸出部と燃料ポンプの吸入部との間を外部管路で接続し、上記外部管路をフレーム構造材の下方にくぐらせた請求項１または２に記載の自動二輪車の燃料供給装置。 A suction part is provided in at least one of the overhang parts of the fuel tank located on both sides of the frame structure material, and the suction part and the suction part of the fuel pump are connected by an external pipe, The fuel supply device for a motorcycle according to claim 1 or 2, wherein the external conduit is passed under the frame structural member.
JP2005350762A 2005-12-05 2005-12-05 Motorcycle fuel supply system Expired - Fee Related JP4211778B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101746452A (en) * 2008-12-01 2010-06-23 光阳工业股份有限公司 Fuel supply device of motor cycle
JP2011074768A (en) * 2009-09-29 2011-04-14 Honda Motor Co Ltd Fuel supply device for motorcycle
CN102285404A (en) * 2010-06-15 2011-12-21 本田技研工业株式会社 Fuel supply apparatus for vehicles
JP2015020592A (en) * 2013-07-19 2015-02-02 スズキ株式会社 Motor cycle
JPWO2018173958A1 (en) * 2017-03-24 2019-12-26 本田技研工業株式会社 Battery arrangement structure for saddle type vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101746452A (en) * 2008-12-01 2010-06-23 光阳工业股份有限公司 Fuel supply device of motor cycle
JP2011074768A (en) * 2009-09-29 2011-04-14 Honda Motor Co Ltd Fuel supply device for motorcycle
CN102285404A (en) * 2010-06-15 2011-12-21 本田技研工业株式会社 Fuel supply apparatus for vehicles
JP2012001052A (en) * 2010-06-15 2012-01-05 Honda Motor Co Ltd Fuel supply device of vehicle
JP2015020592A (en) * 2013-07-19 2015-02-02 スズキ株式会社 Motor cycle
JPWO2018173958A1 (en) * 2017-03-24 2019-12-26 本田技研工業株式会社 Battery arrangement structure for saddle type vehicle

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