JP2007038714A - Fuel supply structure of swing tricycle - Google Patents

Fuel supply structure of swing tricycle Download PDF

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Publication number
JP2007038714A
JP2007038714A JP2005222208A JP2005222208A JP2007038714A JP 2007038714 A JP2007038714 A JP 2007038714A JP 2005222208 A JP2005222208 A JP 2005222208A JP 2005222208 A JP2005222208 A JP 2005222208A JP 2007038714 A JP2007038714 A JP 2007038714A
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Prior art keywords
fuel
fuel supply
supply pipe
vehicle body
pipe
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JP4584790B2 (en
JP2007038714A5 (en
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Katsuichi Yagisawa
勝一 八木澤
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2005222208A priority Critical patent/JP4584790B2/en
Priority to TW095117083A priority patent/TW200704876A/en
Priority to KR1020060046556A priority patent/KR100748201B1/en
Priority to CNB2006100917177A priority patent/CN100432421C/en
Publication of JP2007038714A publication Critical patent/JP2007038714A/en
Publication of JP2007038714A5 publication Critical patent/JP2007038714A5/ja
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0017—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/01—Arrangement of fuel conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J37/00—Arrangements of fuel supply lines, taps, or the like, on motor cycles or engine-assisted cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel supplying pipe of a swing tricycle absorbing bending and twisting due to vertical swing movement and lateral roll movement of a vehicle body, and having high pressure resistance. <P>SOLUTION: In the swing tricycle equipped with a power unit 17 composed of an engine 76 and a continuously variable transmission, a fuel pump 41 is provided to a fuel tank 36 disposed on a vehicle body side so as to supply fuel to the engine 76. A fuel injection valve 91 provided to the engine 76 side is connected to the fuel pump 41 through the fuel supplying pipe 92 made from a resinous pipe capable of elastically deforming. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、揺動三輪車の燃料供給構造の改良に関するものである。   The present invention relates to an improvement in a fuel supply structure of a rocking tricycle.

従来の揺動三輪車の燃料供給構造として、燃料配管を複数の部材から構成して燃料タンクとパワーユニットと接続したものが知られている（例えば、特許文献１参照。）。
また、燃料タンク内の燃料ポンプと、エンジンユニット側のインジェクタとを高圧用ゴム製のホースで接続したものが知られている（例えば、特許文献２参照。）。
実開昭５７−１２２４９２号公報 特開２００３−１７６７６２公報 2. Description of the Related Art As a conventional fuel supply structure for a swing tricycle, there is known a structure in which a fuel pipe is composed of a plurality of members and is connected to a fuel tank and a power unit (for example, see Patent Document 1).
In addition, a fuel pump in a fuel tank and an injector on the engine unit side connected by a high-pressure rubber hose is known (for example, see Patent Document 2).
Japanese Utility Model Publication No. 57-122492 JP 2003-176762 A

特許文献１の第１図には、前車体２にリンク１２、スイングシャフト１１及びシャフト１４を介して後車体１５をスイング自在且つローリング自在に取付けたことが記載されている。   FIG. 1 of Patent Document 1 describes that a rear vehicle body 15 is attached to a front vehicle body 2 via a link 12, a swing shaft 11 and a shaft 14 so as to be swingable and rollable.

また、特許文献１の第２図には、前車体に設けた燃料タンク１９にコック２０を介して連結管２１を接続し、この連結管２１に、フレームに取付けたジョイント２２を介して第１の可撓性連結管２３の一端を接続し、この第１の可撓性連結管２３の他端に金属パイプからなる中間連結管２４の一端を接続し、この中間連結管２４の他端に第２の可撓性連結管２５の一端を接続し、この第２の可撓性連結管２５の他端に後車体１５に固定したガイド連結管２６の一端を接続し、このガイド連結管２６の他端をゴムチューブ２８を介してパワーユニット１６側の気化器２７に接続したことが記載されている。   Further, in FIG. 2 of Patent Document 1, a connecting pipe 21 is connected to a fuel tank 19 provided on the front vehicle body via a cock 20, and the connecting pipe 21 is connected to the first via a joint 22 attached to a frame. One end of the flexible connecting tube 23 is connected, one end of the intermediate connecting tube 24 made of a metal pipe is connected to the other end of the first flexible connecting tube 23, and the other end of the intermediate connecting tube 24 is connected to the other end of the intermediate connecting tube 24. One end of the second flexible connecting tube 25 is connected, and the other end of the second flexible connecting tube 25 is connected to one end of a guide connecting tube 26 fixed to the rear vehicle body 15. Is connected to the vaporizer 27 on the power unit 16 side through a rubber tube 28.

前車体２に対して後車体１５が上下にスイングすれば、前車体２側のジョイント２２と後車体１５側のガイド連結管２６との間に位置する第１の可撓性連結管２３、中間連結管２４、第２の可撓性連結管２５が上下に撓む。また、前車体２に対して後車体１５が左右にロールすれば、第１の可撓性連結管２３、中間連結管２４、第２の可撓性連結管２５が捩れる。   If the rear vehicle body 15 swings up and down with respect to the front vehicle body 2, a first flexible connection tube 23 positioned between the joint 22 on the front vehicle body 2 side and the guide connection tube 26 on the rear vehicle body 15 side, The connecting tube 24 and the second flexible connecting tube 25 bend up and down. Further, when the rear vehicle body 15 rolls left and right with respect to the front vehicle body 2, the first flexible connection tube 23, the intermediate connection tube 24, and the second flexible connection tube 25 are twisted.

特許文献２の図２及び図７には、燃料タンク１０内に燃料ポンプを設け、車体フレーム３４にスイング自在にエンジンユニット１９を取付けるとともにエンジンユニット１９にインジェクタ５０を設け、燃料ポンプとインジェクタ５０とを高圧用ゴム製の燃料ホース６２で接続し、燃料ホース６２の途中を車体フレーム３４に取付けたスティ６３で支持したことが記載されている。   2 and 7 of Patent Document 2, a fuel pump is provided in the fuel tank 10, the engine unit 19 is swingably attached to the vehicle body frame 34, and an injector 50 is provided in the engine unit 19, and the fuel pump, the injector 50, Are connected by a rubber hose 62 made of high-pressure rubber, and the middle of the fuel hose 62 is supported by a stay 63 attached to the vehicle body frame 34.

特許文献１の燃料タンク１９から気化器２７に至る燃料配管には、特に燃料の大きな圧力が作用しないが、例えば、燃料タンクに燃料ポンプを設け、エンジン側に気化器に代えて燃料噴射弁を設けた場合には、これらの燃料ポンプと燃料噴射弁とを接続する燃料配管には、燃料の大きな圧力に耐えるとともに後車体１５の上下スイング動、左右ロール動による撓み、捩れを吸収するものが望まれる。   The fuel piping from the fuel tank 19 to the carburetor 27 in Patent Document 1 does not receive a particularly large fuel pressure. For example, a fuel pump is provided in the fuel tank, and a fuel injection valve is provided on the engine side instead of the carburetor. When provided, the fuel pipe connecting the fuel pump and the fuel injection valve can withstand the large pressure of the fuel and absorb the bending and twisting of the rear vehicle body 15 by the vertical swing movement and the horizontal roll movement. desired.

特許文献２では、揺動三輪車の場合は、上下のスイングに加えて、左右のロール方向の振動が加わる為、これまでの高圧用ゴム製の成形ホースでは、上下左右の振動と、必要な燃料供給量の両立を図ることは困難であった。   In Patent Document 2, in the case of a swinging tricycle, vibrations in the left and right roll directions are applied in addition to the up and down swings. Thus, in conventional high pressure rubber molded hoses, up and down vibrations and necessary fuel are required. It was difficult to achieve both supply amounts.

本発明の目的は、車体の上下スイング動及び左右ロール動による撓み、捩れを吸収するとともに高耐圧性を備えた揺動三輪車の燃料配管を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel pipe for an oscillating tricycle that absorbs bending and twisting caused by vertical swing movement and left / right roll movement of a vehicle body and has high pressure resistance.

請求項１に係る発明は、エンジン及び無段変速機からなるスイングユニットを備える揺動三輪車において、エンジンに燃料を供給するために車体側に配置した燃料タンクに燃料ポンプを設け、この燃料ポンプにエンジン側に設けた燃料噴射弁を、弾性変形可能な樹脂製パイプからなる燃料供給管を介して接続したことを特徴とする。   According to a first aspect of the present invention, in a swing tricycle including a swing unit including an engine and a continuously variable transmission, a fuel pump is provided in a fuel tank disposed on a vehicle body side to supply fuel to the engine. A fuel injection valve provided on the engine side is connected via a fuel supply pipe made of an elastically deformable resin pipe.

燃料供給管を樹脂製とすることにより、燃料ポンプと燃料噴射弁とを接続する燃料配管として高耐圧性を確保した上で弾性変形可能にすることにより、車体側に対するスイングユニットのスイング動に加えて、ロール動しても樹脂製パイプである燃料供給管が撓み、且つ燃料ポンプと燃料噴射弁とを備える揺動三輪車の燃料供給管を実現できる。   By making the fuel supply pipe made of resin, it can be elastically deformed while ensuring high pressure resistance as a fuel pipe connecting the fuel pump and the fuel injection valve. Thus, even if the roll is moved, the fuel supply pipe, which is a resin pipe, bends, and a fuel supply pipe for a swinging tricycle equipped with a fuel pump and a fuel injection valve can be realized.

請求項２に係る発明は、燃料供給管を熱可塑性樹脂材料から構成し、その外径を大きくとも７ｍｍに形成したことを特徴とする。
燃料供給配管が熱可塑性樹脂材料であるから、高圧用繊維材等の編み込みが必要なゴム性の高圧用の燃料供給管に比べて肉厚を小さく、また、内径も小さく製造することが可能になり、外径が小さくできる。これにより、揺動三輪車に必要な燃料供給量と充分な弾性を確保できる。 The invention according to claim 2 is characterized in that the fuel supply pipe is made of a thermoplastic resin material and has an outer diameter of at most 7 mm.
Because the fuel supply pipe is made of thermoplastic resin, it can be manufactured with a smaller wall thickness and smaller inner diameter than the rubber high-pressure fuel supply pipe that requires weaving of high-pressure fiber material, etc. Thus, the outer diameter can be reduced. As a result, the fuel supply amount and sufficient elasticity required for the swinging tricycle can be ensured.

請求項３に係る発明は、燃料供給管を、外径が大きくとも４ｍｍとし、この燃料供給管を支持するために車体側に取付けた支持部材の間隔を小さくとも１５０ｍｍとしたことを特徴とする。
支持部材の間隔を小さくとも１５０ｍｍとすることで、揺動三輪車のロール角が１８０°であっても、好適な燃料供給管とすることができる。 The invention according to claim 3 is characterized in that the fuel supply pipe has an outer diameter of at least 4 mm and the interval between the support members attached to the vehicle body side to support the fuel supply pipe is at least 150 mm. .
By setting the distance between the support members to at least 150 mm, a suitable fuel supply pipe can be obtained even if the roll angle of the swinging tricycle is 180 °.

請求項１に係る発明では、車体側の燃料ポンプとエンジン側の燃料噴射弁とを弾性変形可能な樹脂製パイプである燃料供給管で接続したので、燃料供給管を樹脂製とすることにより、燃料ポンプと燃料噴射弁とを接続する燃料配管として高耐圧性を確保した上で弾性変形可能にすることにより、車体側に対するスイングユニットのスイング動に加えて、ロール動しても樹脂製パイプである燃料供給管が撓み、且つ燃料ポンプと燃料噴射弁とを備える揺動三輪車の燃料供給管を実現できる。   In the invention according to claim 1, since the fuel pump on the vehicle body side and the fuel injection valve on the engine side are connected by a fuel supply pipe that is an elastically deformable resin pipe, the fuel supply pipe is made of resin, In addition to the swing movement of the swing unit with respect to the vehicle body side, in addition to the swing movement of the swing unit with respect to the vehicle body, it is possible to use a plastic pipe as a fuel pipe connecting the fuel pump and the fuel injection valve while ensuring high pressure resistance. It is possible to realize a fuel supply pipe of a swing tricycle including a certain fuel supply pipe bent and a fuel pump and a fuel injection valve.

請求項２に係る発明では、燃料供給管を熱可塑性樹脂材料から構成し、その外径を大きくとも７ｍｍに形成したので、燃料供給配管が熱可塑性樹脂材料であるから、高圧用繊維材等の編み込みが必要なゴム性の高圧用の燃料供給管に比べて肉厚を小さく、また、内径も小さく製造することが可能になり、外径が小さくできる。これにより、揺動三輪車に必要な燃料供給量と充分な弾性を確保できる。   In the invention according to claim 2, since the fuel supply pipe is made of a thermoplastic resin material and has an outer diameter of at most 7 mm, the fuel supply pipe is made of a thermoplastic resin material. Compared to a rubber-type high-pressure fuel supply pipe that requires braiding, it is possible to manufacture with a smaller wall thickness and a smaller inner diameter, and the outer diameter can be reduced. As a result, the fuel supply amount and sufficient elasticity required for the swinging tricycle can be ensured.

請求項３に係る発明では、燃料供給管を、外径が大きくとも４ｍｍとし、この燃料供給管の支持部材の間隔を小さくとも１５０ｍｍとしたので、例えば、揺動三輪車のロール角が１８０°であっても、好適な燃料供給管とすることができる。   In the invention according to claim 3, since the fuel supply pipe has an outer diameter of at least 4 mm and the interval between the support members of the fuel supply pipe is at least 150 mm, the roll angle of the oscillating tricycle is 180 °, for example. Even if it exists, it can be set as a suitable fuel supply pipe.

本発明を実施するための最良の形態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は本発明に係る揺動三輪車の側面図であり、揺動三輪車１０は、１つの前輪１１を操舵するバーハンドル１２、運転者が着座するシート１３を備えた前車体１４と、左右一対の後輪１６，１６、これらの後輪１６，１６を駆動するパワーユニット１７を備えた後車体１８とを揺動機構２１を介して連結することで、前車体１４に対して後車体１８を上下スイング自在及び左右ローリング自在に連結した車両である。 The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a swing tricycle according to the present invention. The swing tricycle 10 includes a bar handle 12 for steering one front wheel 11, a front vehicle body 14 having a seat 13 on which a driver sits, and a pair of left and right wheels. By connecting the rear wheels 16, 16 and the rear vehicle body 18 including the power unit 17 that drives these rear wheels 16, 16 via a swing mechanism 21, the rear vehicle body 18 is moved up and down with respect to the front vehicle body 14. It is a vehicle that is connected so as to be able to swing freely and to roll left and right.

前車体１４は、バーハンドル１２の前方にフロントカバー２３を設け、このフロントカバー２３の上部に、ワイパー２４を備えるウインドスクリーン２６を取付け、バーハンドル１２とシート１３との間の下方にステップフロア２７を設け、シート１３の後方から左右一対のポスト２８，２８（手前側の符号２８のみ示す。）を立ち上げ、ウインドスクリーン２６とポスト２８，２８とにルーフ３１を渡し、シート１３の後方に荷室３２を配置したものである。なお、３５は前輪１１の上方を覆うフロントフェンダ、３６はバックミラー、３７はヘッドランプ、３８はシート１３の下方に設けた燃料タンク、４１は燃料タンク３８内に設けた燃料ポンプ、４２は前車体１４側の車体フレームと揺動機構２１との間に渡した緩衝用のクッションユニットである。   The front vehicle body 14 is provided with a front cover 23 in front of the bar handle 12, and a wind screen 26 having a wiper 24 is attached to the top of the front cover 23, and a step floor 27 is provided below the bar handle 12 and the seat 13. A pair of left and right posts 28, 28 (only the reference numeral 28 on the front side is shown) is raised from the rear of the seat 13, a roof 31 is passed between the wind screen 26 and the posts 28, 28, and a load is placed behind the seat 13. The chamber 32 is arranged. 35 is a front fender that covers the upper side of the front wheel 11, 36 is a rearview mirror, 37 is a headlamp, 38 is a fuel tank provided below the seat 13, 41 is a fuel pump provided in the fuel tank 38, and 42 is a front This is a cushion unit for cushioning that is passed between the vehicle body frame on the vehicle body 14 side and the swing mechanism 21.

後車体１８は、パワーユニット１７に吸気装置５１及び排気装置５２を接続し、これらのパワーユニット１７、吸気装置５１、排気装置５２、他の機能部品及び後輪１６，１６を一体のカバー５３で覆ったものである。   In the rear vehicle body 18, an intake device 51 and an exhaust device 52 are connected to the power unit 17, and the power unit 17, the intake device 51, the exhaust device 52, other functional parts, and the rear wheels 16 and 16 are covered with an integrated cover 53. Is.

揺動機構２１は、前車体１４の車体フレーム下部に前後スイング自在に一端を取付けた取付けたリンク５５と、このリンク５５の他端に前端をスイング自在に取付けるとともに後端を後車体１８のパワーユニット１７にブラケット５６を介して取付けたジョイントケース５７とからなる。   The swing mechanism 21 has a link 55 attached at one end to the lower part of the body frame of the front vehicle body 14 so as to freely swing back and forth, a front end attached to the other end of the link 55 so as to swing freely, and a rear end as a power unit of the rear vehicle body 18. 17 and a joint case 57 attached to a bracket 17 via a bracket 56.

ジョイントケース５７は、ケース本体６１と、このケース本体６１内に回転自在に挿入するとともに後部をパワーユニット１７側に取付けたジョイント軸６２と、これらのケース本体６１及びジョイント軸６２のそれぞれの間に介在させたダンパ部６３とからなる。   The joint case 57 includes a case body 61, a joint shaft 62 that is rotatably inserted into the case body 61 and has a rear portion attached to the power unit 17 side, and is interposed between the case body 61 and the joint shaft 62. The damper part 63 is made to be.

ダンパ部６３は、ジョイント軸６２から径方向に延ばした複数の押圧部材とケース本体６１との間に複数の円柱状のラバーを介在させ、押圧部材とケース本体６１との相対回転によりラバーを押し縮めることでダンパ作用を発揮する、いわゆる「ナイトハルトダンパ」である。   The damper part 63 interposes a plurality of columnar rubbers between the plurality of pressing members extending in the radial direction from the joint shaft 62 and the case body 61, and pushes the rubber by relative rotation between the pressing members and the case body 61. It is a so-called “Nighthart damper” that exerts a damper action when contracted.

図２は本発明に係る揺動三輪車の後車体を示す側面図（一部断面図）であり、揺動機構２１を構成するジョイント軸６２にボルト６６，６６でブラケット５６を取付け、このブラケット５６にパワーユニット１７の下部をボルト６７，６７で取付け、パワーユニット１７を構成するシリンダヘッド６８の上部に吸気装置５１を取付け、シリンダヘッド６８の下部に排気装置５２を取付け、また、パワーユニット１７の上部に、カバー５３を支持するステー部材７１を取付けたことを示す。なお、図中の矢印（ＦＲＯＮＴ）は車両前方を表す（以下同じ。）。図中の７３はパワーユニット１７の右側面側に配置したラジエータである。   FIG. 2 is a side view (partially sectional view) showing the rear vehicle body of the swinging tricycle according to the present invention. A bracket 56 is attached to the joint shaft 62 constituting the swinging mechanism 21 with bolts 66, 66. The lower part of the power unit 17 is attached with bolts 67, 67, the intake device 51 is attached to the upper part of the cylinder head 68 constituting the power unit 17, the exhaust device 52 is attached to the lower part of the cylinder head 68, and the upper part of the power unit 17 is The stay member 71 that supports the cover 53 is attached. In addition, the arrow (FRONT) in a figure represents the vehicle front (the same is hereafter). Reference numeral 73 in the figure denotes a radiator disposed on the right side surface of the power unit 17.

パワーユニット１７は、エンジン７６と、このエンジン７６に一体的に連結した無段変速機７７とからなり、クランク軸８１の回転を、ベルト８２を介して従動軸８３に伝え、この従動軸８３から図示せぬギヤを介して出力軸８４に伝えて、出力軸８４に取付けた左右の後輪１６，１６（図１参照）を駆動する。なお、８６はヘッドカバー、８７はシリンダブロック、８８は変速機ケースである。   The power unit 17 includes an engine 76 and a continuously variable transmission 77 integrally connected to the engine 76. The rotation of the crankshaft 81 is transmitted to the driven shaft 83 via the belt 82. This is transmitted to the output shaft 84 via a gear (not shown) to drive the left and right rear wheels 16, 16 (see FIG. 1) attached to the output shaft 84. In addition, 86 is a head cover, 87 is a cylinder block, 88 is a transmission case.

シリンダヘッド６８は、吸気通路に燃料を噴射する燃焼噴射弁９１を固定した吸気管９５を取付けたものであり、燃料噴射弁９１には、燃料タンク３８（図１参照）の燃料ポンプ４１（図１参照）から延びる樹脂製の燃料供給管９２を接続する。   The cylinder head 68 is provided with an intake pipe 95 to which a combustion injection valve 91 that injects fuel into an intake passage is fixed. The fuel injection valve 91 includes a fuel pump 41 (see FIG. 1) of the fuel tank 38 (see FIG. 1). A resin fuel supply pipe 92 extending from 1) is connected.

吸気装置５１は、吸気管９５と、この吸気管９５の端部に接続したスロットルボディ９６と、このスロットルボディ９６の吸い込み口側に接続したコネクティングチューブ９７と、このコネクティングチューブ９７に接続したエアクリーナ９８とからなり、スロットルボディ９６、エアクリーナ９８共にパワーユニット１７の上方に位置し、エアクリーナ９８をステー部材７１で支持する。なお、１０１はスロットルボディ９６内に設けたスロットルバルブを開閉するためにバーハンドル１２（図１参照）側のスロットルグリップから延ばしたスロットルケーブルである。   The intake device 51 includes an intake pipe 95, a throttle body 96 connected to the end of the intake pipe 95, a connecting tube 97 connected to the suction port side of the throttle body 96, and an air cleaner 98 connected to the connecting tube 97. The throttle body 96 and the air cleaner 98 are both positioned above the power unit 17, and the air cleaner 98 is supported by the stay member 71. A throttle cable 101 extends from a throttle grip on the bar handle 12 (see FIG. 1) side to open and close a throttle valve provided in the throttle body 96.

排気装置５２は、シリンダヘッド６８の下部に一端をボルト１０４，１０４及びナット１０５，１０５で取付けるとともにシリンダヘッド６８の左側方をほぼ上方に延ばした前部排気管１０６と、この前部排気管１０６の他端に接続するとともにやや後下がりに後方へ延ばした触媒管１０７と、この触媒管１０７の後部に接続するとともに後方斜め下方に延ばした後部排気管１０８と、この後部排気管１０８の後端部に接続した消音器１１１と、この消音器１１１から後方斜め下方に延ばしたテールパイプ１１２とからなり、消音器１１１を触媒管１０７よりも低い位置に配置するとともに、変速機ケース８８から突出させた突出部８８ａにブラケット１１４を介して消音器１１１を取付けたものである。   The exhaust device 52 includes a front exhaust pipe 106 having one end attached to the lower portion of the cylinder head 68 with bolts 104 and 104 and nuts 105 and 105 and extending the left side of the cylinder head 68 substantially upward, and the front exhaust pipe 106. And a rear exhaust pipe 108 connected to the rear part of the catalyst pipe 107 and extending rearward and obliquely downward, and a rear end of the rear exhaust pipe 108. And a tail pipe 112 extending obliquely downward and rearward from the silencer 111. The silencer 111 is disposed at a position lower than the catalyst pipe 107 and protrudes from the transmission case 88. The silencer 111 is attached to the protruding portion 88a via the bracket 114.

前部排気管１０６のシリンダヘッド６８への取付部から後部排気管１０８までを一本の排気管と見なすと、前部排気管１０６はシリンダヘッド６８の下部からほぼ上方に延び、触媒管１０７はほぼ水平に後方へ延び、後部排気管１０８は後方斜め下方に延びるから、後車体１８におけるカバー５３内の限られたスペースで一本の排気管の全長、即ち排気管長をより大きくすることができる。   Assuming that the portion from the front exhaust pipe 106 attached to the cylinder head 68 to the rear exhaust pipe 108 is a single exhaust pipe, the front exhaust pipe 106 extends substantially upward from the lower part of the cylinder head 68, and the catalyst pipe 107 Since the rear exhaust pipe 108 extends rearward substantially horizontally and extends rearward and obliquely downward, the overall length of one exhaust pipe, that is, the exhaust pipe length can be increased in a limited space within the cover 53 in the rear vehicle body 18. .

ステー部材７１は、パワーユニット１７に取付けて立ち上げたステー本体１１７と、このステー本体１１７の上端部に取付けたフレーム部材１１８と、このフレーム部材１１８に取付けたカバー支持ブラケット１２１とからなる。   The stay member 71 includes a stay main body 117 attached to and raised from the power unit 17, a frame member 118 attached to the upper end portion of the stay main body 117, and a cover support bracket 121 attached to the frame member 118.

ステー本体１１７は、前部ステー１２４，１２５と、後部ステー１２７とからなり、後部ステー１２７は、エアクリーナ９８と消音器１１１との間に位置し、消音器１１１で発生する熱がエアクリーナ９８等に伝わらないように遮熱する遮熱板１２８を取付けた部材である。   The stay main body 117 includes front stays 124 and 125 and a rear stay 127. The rear stay 127 is located between the air cleaner 98 and the silencer 111, and heat generated by the silencer 111 is transmitted to the air cleaner 98 and the like. It is a member to which a heat shield plate 128 that shields heat so as not to be transmitted is attached.

カバー支持ブラケット１２１は、前部に設けた左右一対の前部ブラケット１３１，１３１（手前側の符号１３１のみ示す。）と、後部に設けた左右一対の後部ブラケット１３２，１３２（手前側の符号１３２のみ示す。）とからなり、一体のカバー５３をラバーを介してボルト１３３で取付けた部材である。   The cover support bracket 121 includes a pair of left and right front brackets 131 and 131 (only the front side reference 131 is shown) provided at the front and a pair of left and right rear brackets 132 and 132 (a front side reference 132) provided at the rear. This is a member in which an integral cover 53 is attached with a bolt 133 via a rubber.

カバー５３は、前部にヘッドカバー８６側を車体前方に臨ませる前部開口１３６を設け、カバー５３の内外を通気するために上部にラビリンス構造とした通気口１３７を設け、後部に後部開口１３８を設けた部材である。   The cover 53 is provided with a front opening 136 at the front so that the head cover 86 side faces the front of the vehicle body, a vent 137 having a labyrinth structure is provided at the top to vent the inside and outside of the cover 53, and a rear opening 138 is provided at the rear. It is a provided member.

上記した吸気装置５１の構成部品、排気装置５２の構成部品及び燃料噴射弁９１は、機能部品であり、これらの機能部品とパワーユニット１７（即ち、エンジン７６及び無段変速機７７）とは、後輪１６，１６を駆動する駆動部１３０を構成する。   The above-described components of the intake device 51, the components of the exhaust device 52, and the fuel injection valve 91 are functional components. These functional components and the power unit 17 (that is, the engine 76 and the continuously variable transmission 77) are A drive unit 130 that drives the wheels 16 and 16 is configured.

図３は本発明に係る揺動三輪車の要部平面図であり、左右の後輪１６，１６間にパワーユニット１７を配置し、吸気装置５１を構成するスロットルボディ９６を車体前後方向に延びる車体中心線１４０上に配置し、スロットルボディ９６の後方にエアクリーナ９８を配置し、排気装置５２を構成する触媒管１０７を車体前後方向に延ばすとともに消音器１１１を車幅方向に延ばすことで触媒管１０７の長手方向と消音器１１１の長手方向とを直角に配置したことを示す。なお、１４１Ａ，１４１Ｂは後輪１６，１６の車軸であり、これらの車軸１４１Ａ，１４１Ｂは差動機構（不図示）を介して連結する。
スロットルボディ９６は、シリンダヘッド６８から後方に延びる吸気管９５の後端に接続したものである。 FIG. 3 is a plan view of the main part of the swinging tricycle according to the present invention, in which the power unit 17 is disposed between the left and right rear wheels 16 and 16 and the throttle body 96 constituting the intake device 51 extends in the longitudinal direction of the vehicle body. The air cleaner 98 is arranged behind the throttle body 96, the catalyst pipe 107 constituting the exhaust device 52 is extended in the longitudinal direction of the vehicle body, and the silencer 111 is extended in the vehicle width direction. It shows that the longitudinal direction and the longitudinal direction of the silencer 111 are arranged at right angles. 141A and 141B are axles of the rear wheels 16 and 16, and these axles 141A and 141B are connected via a differential mechanism (not shown).
The throttle body 96 is connected to the rear end of the intake pipe 95 extending rearward from the cylinder head 68.

エアクリーナ９８は、井桁状に組んだフレーム部材１１８の後部に３箇所でボルト１４２にて取付けたものであり、エアクリーナ９８を構成する平面視で車体前後方向に短く車幅方向に長い四角形状のエアクリーナケース１４３内を隔壁１４４で平面視三角形状のダクト室１４６と浄化室１４７とに分離し、ダクト室１４４の上方の上壁に三角形状の吸気口１４８を設け、エアクリーナケース１４３の上壁に、ダクト室１４４と浄化室１４７とを連通させる上部ダクト１５１を設けたものである。なお、図中のＳ１はエアクリーナ９８の車体左右方向の幅、Ｓ２はエアクリーナ９８の車体前後方向の長さであり、Ｓ１＞Ｓ２の関係がある。１５２はコネクティングチューブ９７に一体に設けた延長部であり、浄化室１４７内に配置した部分である。   The air cleaner 98 is attached to the rear portion of the frame member 118 assembled in a cross-girder shape with three bolts 142, and is a rectangular air cleaner that is short in the longitudinal direction of the vehicle body and long in the vehicle width direction in a plan view of the air cleaner 98. The inside of the case 143 is separated into a triangular chamber duct 146 and a purification chamber 147 in a plan view by a partition wall 144. A triangular air inlet 148 is provided on the upper wall above the duct chamber 144, and the air cleaner case 143 has an upper wall on the upper wall. An upper duct 151 that connects the duct chamber 144 and the purification chamber 147 is provided. In the figure, S1 is the width of the air cleaner 98 in the lateral direction of the vehicle body, S2 is the length of the air cleaner 98 in the longitudinal direction of the vehicle body, and there is a relationship of S1> S2. Reference numeral 152 denotes an extension provided integrally with the connecting tube 97, which is a portion disposed in the purification chamber 147.

触媒管１０７と消音器１１１とは、四角形状のスペース１５５の２辺を形成する。
スペース１５５は四角いから、後輪１６，１６間でより大きな面積を得ることができ、このスペース１５５内にスロットルボディ９６、エアクリーナ９８及びその他の多くの機能部品（例えば、燃料噴射弁９１、電装品、バッテリ（不図示）等である。）を整然と密に並べて配置することが可能になり、コンパクト化を図ることができ、スペース１５５を有効に利用することができる。 The catalyst tube 107 and the silencer 111 form two sides of a rectangular space 155.
Since the space 155 is square, a larger area can be obtained between the rear wheels 16 and 16, and in this space 155, the throttle body 96, the air cleaner 98 and many other functional parts (for example, the fuel injection valve 91, electrical components). , Battery (not shown), etc.) can be arranged in an orderly and dense manner, and can be made compact, and the space 155 can be used effectively.

フレーム部材１１８は、車幅方向に延ばすととも触媒管１０７の前端部上方を横切る前フレーム１６１と、この前フレーム１６１の後方に且つ前フレーム１６１に平行に配置した後フレーム１６２と、これらの前フレーム１６１の左端部よりも車体内方に且つ前フレーム１６１及び後フレーム１６２に直交するように連結した左フレーム１６３と、この左フレーム１６３の右方に且つ左フレーム１６３に平行になるように前フレーム１６１及び後フレーム１６２のそれぞれに連結した右フレーム１６４とからなり、左フレーム１６３と右フレーム１６４とにエアクリーナ９８を取付けたものである。   The frame member 118 extends in the vehicle width direction and crosses over the front end portion of the catalyst pipe 107, a rear frame 162 disposed behind and parallel to the front frame 161, and the front frame 161 thereof. A left frame 163 that is connected to the inside of the vehicle body from the left end of the frame 161 so as to be orthogonal to the front frame 161 and the rear frame 162, and to the front of the left frame 163 to the right and parallel to the left frame 163 The right frame 164 is connected to each of the frame 161 and the rear frame 162, and an air cleaner 98 is attached to the left frame 163 and the right frame 164.

後フレーム１６２は、ほぼＶ字形状の後部ステー１２７で支持した部材である。
ラジエータ７３は、シリンダブロック８７及び変速機ケース８８の右側前部に図示せぬケースカバーを介して取付け、シリンダブロック８７側から右側の後輪１６の前方に突出するように配置したものである。なお、７３ａはラジエータキャップである。 The rear frame 162 is a member supported by a substantially V-shaped rear stay 127.
The radiator 73 is attached to the right front portion of the cylinder block 87 and the transmission case 88 via a case cover (not shown), and is disposed so as to protrude forward of the right rear wheel 16 from the cylinder block 87 side. Reference numeral 73a denotes a radiator cap.

二点鎖線で示したカバー５３は、パワーユニット１７、吸気装置５１、排気装置５２、後輪１６，１６、ステー部材７１、ラジエータ７３の上方を覆い、ラジエータ７３の前方に走行風をカバー５３の内部に取り入れる、特に走行風をラジエータ７３に当てるためのルーバー１６６を設けたものである。   The cover 53 indicated by a two-dot chain line covers the power unit 17, the intake device 51, the exhaust device 52, the rear wheels 16 and 16, the stay member 71, and the radiator 73, and the traveling wind is directed to the front of the radiator 73 inside the cover 53. In particular, a louver 166 for applying the traveling wind to the radiator 73 is provided.

燃料供給管９２は、燃料ポンプ４１から燃料タンク３８の上方を右方斜め後方に延び、そして後方に延び、更に、燃料タンク３８の下方を車体前方に延び、Ｕターンして後方に延びた後に揺動機構２１（図１参照）側に近づき、そして揺動機構２１に沿って後方に延びて吸気管９５に設けた燃料噴射弁９１に接続した部材であり、細径の樹脂製で弾性変形するので、揺動三輪車への組付け性を向上させることができ、車体の揺動に追従できるものである。なお、１６８は燃料タンク３８のフィラーキャップである。   The fuel supply pipe 92 extends from the fuel pump 41 to the upper side of the fuel tank 38 obliquely to the right and rearward, and further to the lower side of the fuel tank 38 to the front of the vehicle body. A member that approaches the swinging mechanism 21 (see FIG. 1) and extends rearward along the swinging mechanism 21 and is connected to a fuel injection valve 91 provided in the intake pipe 95. The member is made of a thin resin and elastically deformed. Therefore, the assembling property to the swinging tricycle can be improved, and the swinging of the vehicle body can be followed. Reference numeral 168 denotes a filler cap for the fuel tank 38.

図４は本発明に係る燃料供給管を示す揺動三輪車の要部側面図であり、燃料タンク３８は、車体フレーム２０１に設けた左右一対の上部ブラケット２０２，２０２（手前側の符号２０２のみ示す。）にフランジ部３８ａを取付け、車体フレーム２０１に設けた左右一対の下部ブラケット２０３，２０３（手前側の符号２０３のみ示す。）に当て板２０４を介して底部３８ｂを取付けたものであり、この燃料タンク３８の上部に内蔵型の燃料ポンプ４１を取付ける。   FIG. 4 is a side view of the main part of the swinging tricycle showing the fuel supply pipe according to the present invention. The fuel tank 38 includes a pair of left and right upper brackets 202, 202 provided on the body frame 201 (only the reference numeral 202 on the front side is shown). )) And a bottom portion 38b is attached to a pair of left and right lower brackets 203, 203 (only the reference numeral 203 on the front side) provided on the vehicle body frame 201 via a contact plate 204. A built-in fuel pump 41 is attached to the upper part of the fuel tank 38.

燃料供給管９２は、弾性変形可能な熱可塑性樹脂材料からなり、外径が大きくとも７ｍｍ、好ましくは、外径が大きくとも４ｍｍに形成したパイプであって、その一端をコネクタ２０６を介して燃料ポンプ４１に接続し、燃料タンク３８の後部上方を後方へ延ばし、燃料タンク３８の後方で下方に曲げて下方斜め前方へ車体フレーム２０１に沿って延ばし、車体フレーム２０１の屈曲部２０１ａの近傍で揺動機構２１のジョイントケース５７に沿わせ、ジョントケース５７の後端近傍で立ち上げ、先端をコネクタ２０８を介して燃料噴射弁９１に接続し、途中を車体フレーム２０１に取付けたクランプ２０９，２０９及びジョイントケース５７に取付けたクランプ２１０，２１０で支持したものである。   The fuel supply pipe 92 is made of an elastically deformable thermoplastic resin material and is a pipe having an outer diameter of at most 7 mm, preferably an outer diameter of at most 4 mm. One end of the pipe is connected to the fuel via the connector 206. Connected to the pump 41, the rear upper part of the fuel tank 38 extends rearward, bends downward at the rear of the fuel tank 38, extends downward and forward along the vehicle body frame 201, and swings in the vicinity of the bent part 201a of the vehicle body frame 201. Along with the joint case 57 of the moving mechanism 21, a clamp 209, 209 is raised near the rear end of the joint case 57, connected to the fuel injection valve 91 through the connector 208, and attached to the vehicle body frame 201 in the middle. It is supported by clamps 210 and 210 attached to the joint case 57.

燃料供給管９２は、可撓性を有するように外径を小さくしているから、屈曲の曲率半径を小さくすることができて、レイアウトの自由度が高く、パワーユニット１７が上下にスイング動したり後車体１８がロール動して、特に、燃料供給管９２の車体フレーム２０１からジョイントケース５７に渡した部分、ジョイントケース５７から燃料噴射弁９１までの部分に屈曲力、捩れ力が作用しても、容易に屈曲し、容易に捩れるため、この影響を受けにくく、また、大きな燃料圧力にも耐えることができる。また、レイアウトする際にも容易に屈曲させることができ、配管作業が簡単に行える。
図示しないが、燃料供給管９２は、車体フレーム２０１及びジョイントケース５７の少なくとも一方に複数箇所で固定する。 Since the fuel supply pipe 92 has a small outer diameter so as to have flexibility, the radius of curvature of bending can be reduced, the degree of freedom in layout is high, and the power unit 17 can swing up and down. Even when the rear vehicle body 18 rolls, bending force or torsional force acts on the portion of the fuel supply pipe 92 that extends from the vehicle body frame 201 to the joint case 57 and the portion from the joint case 57 to the fuel injection valve 91. Since it is easily bent and twisted easily, it is not easily affected by this, and can withstand a large fuel pressure. Further, it can be bent easily when laying out and piping work can be easily performed.
Although not shown, the fuel supply pipe 92 is fixed to at least one of the vehicle body frame 201 and the joint case 57 at a plurality of locations.

また、クランク２０９，２０９の間隔、クランプ２１０，２１０の間隔は、それぞれ小さくとも１５０ｍｍを確保した。これにより、車体のロール動によって燃料供給管９２が大きく捩れても（例えば、１８０°）、燃料供給管９２の燃料供給機能を果たすことができる。   In addition, the distance between the cranks 209 and 209 and the distance between the clamps 210 and 210 were each ensured at least 150 mm. Thereby, even if the fuel supply pipe 92 is largely twisted (for example, 180 °) by the roll movement of the vehicle body, the fuel supply function of the fuel supply pipe 92 can be achieved.

図５は本発明に係る燃料供給管の説明図であり、燃料供給管９２は、熱可塑性樹脂製材料（例えば、ナイロン）から形成した部材であり、ゴム等の弾性材料から形成する場合と比較して成形性が良好なもので、外周面を弾性部材（例えば、ゴム）からなる被覆層２１１によって被覆するようにしてもよく、このように燃料供給管９２を被覆層２１１によって被覆することで燃料供給管９２を、メンテナンス時におけるバッテリ液の付着、走行中における酸性雨の付着等から保護し、燃料供給管９２の長寿命化を図ることができる。被覆層２１１は、燃料供給管９２の一端から他端まで全体に設けるか、又は燃料供給管９２の一部に設けてもよい。   FIG. 5 is an explanatory view of a fuel supply pipe according to the present invention. The fuel supply pipe 92 is a member formed from a thermoplastic resin material (for example, nylon), and is compared with a case where it is formed from an elastic material such as rubber. The outer peripheral surface may be covered with a covering layer 211 made of an elastic member (for example, rubber), and the fuel supply pipe 92 is covered with the covering layer 211 in this way. The fuel supply pipe 92 can be protected from adhesion of battery liquid during maintenance, acid rain during travel, and the like, and the life of the fuel supply pipe 92 can be extended. The coating layer 211 may be provided entirely from one end of the fuel supply pipe 92 to the other end, or may be provided on a part of the fuel supply pipe 92.

また、燃料供給管９２に、その内周面を被覆するようにフッ素ゴム層を形成してもよい。 フッ素ゴム層によって、燃料供給管９２の内部に硫黄成分の含有量が多いガソリン（サワーガソリン）を流したときに、そのガソリンから燃料供給管９２を保護することでも燃料供給管９２の長寿命化を図ることができる。   Further, a fluorine rubber layer may be formed on the fuel supply pipe 92 so as to cover the inner peripheral surface thereof. When the gasoline (sour gasoline) containing a large amount of sulfur component is caused to flow inside the fuel supply pipe 92 by the fluororubber layer, the life of the fuel supply pipe 92 can be extended by protecting the fuel supply pipe 92 from the gasoline. Can be achieved.

燃料ポンプに設けた吐出側パイプ２１５に接続したコネクタ２０６は、ハウジング２１６と、このハウジング２１６の端部に係止したリテーナ２１８とからなる。
ハウジング２１６は、燃料供給管９２の端部９２ａに接続する接続部２２１と、この接続部２２１に設けた通孔２２２に連通し且つ吐出側パイプ２１５の端部２１５ａを挿入するパイプ挿入孔２２３と、端部に設けた環状部２２４と、側面に設けた開口部２２５，２２５とを備える。 A connector 206 connected to a discharge side pipe 215 provided in the fuel pump includes a housing 216 and a retainer 218 locked to an end of the housing 216.
The housing 216 includes a connection part 221 connected to the end part 92 a of the fuel supply pipe 92, a pipe insertion hole 223 that communicates with the through hole 222 provided in the connection part 221 and inserts the end part 215 a of the discharge side pipe 215. And an annular portion 224 provided at the end, and openings 225 and 225 provided on the side surfaces.

リテーナ２１７は、環状の基部２２６と、この基部２２６から先がすぼまるように延ばした弾性変形可能な複数の先端部２２７と、これらの先端部２２７の側面に設けた側面突出部２２８とからなり、先端部２２７を吐出側パイプ２１５の拡径部２１５ｂに突き当てるとともに側面突出部２２８をハウジング２１６の環状部２２４に係止することで、吐出側パイプ２１５にコネクタ２０６を接続する。なお、２３１，２３１はシール部材としてのＯリング、２３２はパイプ挿入穴２２３内に吐出側パイプ２１５の端部２１５ａを位置決めする位置決め部材である。   The retainer 217 includes an annular base portion 226, a plurality of elastically deformable tip portions 227 extending from the base portion 226 so as to be tapered, and side protrusions 228 provided on the side surfaces of the tip portions 227. Thus, the connector 206 is connected to the discharge side pipe 215 by abutting the tip end portion 227 against the enlarged diameter portion 215 b of the discharge side pipe 215 and engaging the side surface protrusion 228 with the annular portion 224 of the housing 216. Reference numerals 231 and 231 denote O-rings as seal members, and 232 denotes positioning members for positioning the end 215 a of the discharge side pipe 215 in the pipe insertion hole 223.

図６は本発明に係る燃料供給管の扁平率と要求曲げＲとの関係を示すグラフであり、縦軸は扁平率、横軸は要求曲げＲを表す。
図７は本発明に係る燃料供給管の扁平率及び要求曲げＲを説明する説明図である。
図７において、燃料供給管を曲げずに直線状に延ばした状態では、燃料供給管のＡ−Ａ線断面は円形となり、外径がＤ１、肉厚（板厚）がｔ１となる。また、燃料供給管を曲げた状態（中立位置の最小曲げ半径がＲ（要求曲げＲ））では、燃料供給管のＢ−Ｂ線断面はほぼ楕円形となり、楕円の外形の短径がＤ２、肉厚（板厚）がｔ２となる。
以上から、扁平率＝（短径側外径Ｄ２＋板厚ｔ２）／（初期外径Ｄ１＋板厚ｔ１）となる。 FIG. 6 is a graph showing the relationship between the flatness of the fuel supply pipe according to the present invention and the required bending R. The vertical axis represents the flatness and the horizontal axis represents the required bending R.
FIG. 7 is an explanatory view for explaining the flatness and required bending R of the fuel supply pipe according to the present invention.
In FIG. 7, in a state where the fuel supply pipe is linearly extended without bending, the cross section along the line AA of the fuel supply pipe is circular, the outer diameter is D1, and the wall thickness (plate thickness) is t1. In the state where the fuel supply pipe is bent (the minimum bending radius of the neutral position is R (required bending R)), the cross section of the fuel supply pipe along the line B-B is almost elliptical, and the minor axis of the outer shape of the ellipse is D2. The wall thickness (plate thickness) is t2.
From the above, the flatness ratio = (short diameter side outer diameter D2 + plate thickness t2) / (initial outer diameter D1 + plate thickness t1).

図６に戻って、グラフでは、燃料供給管の外径が４．０ｍｍ、５．０ｍｍ、７．０ｍｍ及び８．０ｍｍのものについての扁平率と要求曲げＲとの関係を示す。
要求曲げＲが所定値Ｍを上回り、且つ扁平率が許容扁平率を下回る領域は、要求曲げＲが大きくても、扁平率が小さくて燃料供給管のつぶれが大きいＮＧゾーンであり、外径が大きくとも７．０ｍｍ（即ち、４．０ｍｍ、５．０ｍｍ、７．０ｍｍ）では、ＮＧゾーンを外れているが、外径が８．０ｍｍのものでは、ＮＧゾーンに入る。
本実施形態の揺動三輪車では、扁平率を８０％以上、要求曲げＲを２５Ｒとしている。
従って、外径が大きくとも７ｍｍの燃料供給管では、スイング動及びロール動する揺動三輪車に必要な燃料供給量と充分な弾性を確保することができる。 Returning to FIG. 6, the graph shows the relationship between the flatness ratio and the required bending R for the fuel supply pipes having outer diameters of 4.0 mm, 5.0 mm, 7.0 mm, and 8.0 mm.
The region where the required bending R exceeds the predetermined value M and the flatness is less than the allowable flatness is an NG zone where the flatness is small and the fuel supply pipe is crushed even if the required bending R is large, and the outer diameter is small. At most 7.0 mm (that is, 4.0 mm, 5.0 mm, 7.0 mm), it is outside the NG zone, but when the outer diameter is 8.0 mm, it enters the NG zone.
In the swing tricycle of the present embodiment, the flatness is 80% or more and the required bending R is 25R.
Therefore, with a fuel supply pipe having an outer diameter of 7 mm at the maximum, the fuel supply amount and sufficient elasticity required for the swinging tricycle that swings and rolls can be ensured.

以上の図１、図３及び図４に示したように、本発明は、エンジン７６及び無段変速機７７からなるスイングユニットとしてのパワーユニット１７を備える揺動三輪車１０において、エンジン７６に燃料を供給するために車体側に配置した燃料タンク３８に燃料ポンプ４１を設け、この燃料ポンプ４１にエンジン７６側に設けた燃料噴射弁９１を、弾性変形可能な樹脂製パイプからなる燃料供給管９２を介して接続したことを特徴とする。   As shown in FIGS. 1, 3, and 4, the present invention supplies fuel to the engine 76 in the oscillating tricycle 10 including the power unit 17 as a swing unit including the engine 76 and the continuously variable transmission 77. Therefore, a fuel pump 41 is provided in a fuel tank 38 disposed on the vehicle body side, and a fuel injection valve 91 provided on the fuel pump 41 on the engine 76 side is connected via a fuel supply pipe 92 made of an elastically deformable resin pipe. It is characterized by being connected.

これにより、燃料供給管９２を樹脂製とすることにより、燃料ポンプ４１と燃料噴射弁９１とを接続する燃料配管として高耐圧性を確保した上で弾性変形可能にすることにより、車体側に対するパワーユニット１７のスイング動に加えて、ロール動しても樹脂製パイプである燃料供給管９２が撓み、且つ燃料ポンプ４１と燃料噴射弁９１とを備える揺動三輪車１０の燃料配管を実現できる。   As a result, the fuel supply pipe 92 is made of resin, and as a fuel pipe for connecting the fuel pump 41 and the fuel injection valve 91, high pressure resistance is ensured and elastic deformation is possible. In addition to the 17 swing motions, the fuel supply pipe 92 which is a resin pipe can be bent even if the roll motion is performed, and the fuel piping of the swinging tricycle 10 including the fuel pump 41 and the fuel injection valve 91 can be realized.

また、本発明は、燃料供給管９２を熱可塑性樹脂材料から構成し、その外径を大きくとも７ｍｍに形成したことを特徴とする。
これにより、燃料供給配管９２が熱可塑性樹脂材料であるから、高圧用繊維材等の編み込みが必要なゴム性の高圧用の燃料供給管に比べて肉厚を小さく、また、内径も小さく製造することが可能になり、外径が小さくできる。これにより、揺動三輪車１０に必要な燃料供給量と充分な弾性を確保できる。 Further, the present invention is characterized in that the fuel supply pipe 92 is made of a thermoplastic resin material and has an outer diameter of at most 7 mm.
Thus, since the fuel supply pipe 92 is made of a thermoplastic resin material, the thickness is smaller and the inner diameter is smaller than that of a rubber-type high-pressure fuel supply pipe that requires braiding of a high-pressure fiber material or the like. And the outer diameter can be reduced. Thereby, the fuel supply amount required for the swing tricycle 10 and sufficient elasticity can be ensured.

更に、本発明は、燃料供給管９２を、外径が大きくとも４ｍｍとし、この燃料供給管９２を支持するために車体側に取付けた支持部材としてのクランプ２０９，２０９（又はクランプ２１０，２１０）の間隔を小さくとも１５０ｍｍとしたことを特徴とする。   Furthermore, according to the present invention, the fuel supply pipe 92 has an outer diameter of at most 4 mm, and the clamps 209 and 209 (or clamps 210 and 210) as support members attached to the vehicle body side to support the fuel supply pipe 92 are provided. It is characterized by the fact that the interval is at least 150 mm.

これにより、例えば、揺動三輪車１０のロール角が１８０°であっても、好適な燃料供給管９２とすることができる。   Thereby, for example, even if the roll angle of the rocking tricycle 10 is 180 °, a suitable fuel supply pipe 92 can be obtained.

尚、本発明は、ユニットスイングの二輪車に適用できる。   The present invention can be applied to a unit swing two-wheeled vehicle.

本発明の揺動三輪車の燃料供給構造は、揺動三輪車に好適である。   The fuel supply structure for a swinging tricycle according to the present invention is suitable for a swinging tricycle.

本発明に係る揺動三輪車の側面図である。It is a side view of the rocking tricycle according to the present invention. 本発明に係る揺動三輪車の後車体を示す側面図である。It is a side view which shows the rear vehicle body of the rocking tricycle which concerns on this invention. 本発明に係る揺動三輪車の要部平面図である。It is a principal part top view of the rocking tricycle which concerns on this invention. 本発明に係る燃料供給管を示す揺動三輪車の要部側面図である。It is a principal part side view of the rocking tricycle which shows the fuel supply pipe | tube which concerns on this invention. 本発明に係る燃料供給管の説明図である。It is explanatory drawing of the fuel supply pipe | tube which concerns on this invention. 本発明に係る燃料供給管の扁平率と要求曲げＲとの関係を示すグラフである。It is a graph which shows the relationship between the flatness of the fuel supply pipe | tube which concerns on this invention, and the request | requirement bending R. 本発明に係る燃料供給管の扁平率及び要求曲げＲを説明する説明図である。It is explanatory drawing explaining the flatness and the request | requirement bending R of the fuel supply pipe | tube which concern on this invention.

符号の説明Explanation of symbols

１０…揺動三輪車、１７…スイングユニット（パワーユニット）、３８…燃料タンク、４１…燃料ポンプ、７６…エンジン、７７…無段変速機、９１…燃料噴射弁、９２…燃料供給管、２０９，２１０…支持部材（クランプ）。   DESCRIPTION OF SYMBOLS 10 ... Swing tricycle, 17 ... Swing unit (power unit), 38 ... Fuel tank, 41 ... Fuel pump, 76 ... Engine, 77 ... Continuously variable transmission, 91 ... Fuel injection valve, 92 ... Fuel supply pipe, 209, 210 ... support member (clamp).

Claims (3)

エンジン及び無段変速機からなるスイングユニットを備える揺動三輪車において、
前記エンジンに燃料を供給するために車体側に配置した燃料タンクに燃料ポンプを設け、この燃料ポンプに前記エンジン側に設けた燃料噴射弁を、弾性変形可能な樹脂製パイプからなる燃料供給管を介して接続したことを特徴とする揺動三輪車の燃料供給構造。 In a swing tricycle equipped with a swing unit comprising an engine and a continuously variable transmission,
In order to supply fuel to the engine, a fuel pump is provided in a fuel tank disposed on the vehicle body side, and a fuel injection valve provided on the engine side of the fuel pump is provided with a fuel supply pipe made of an elastically deformable resin pipe. A fuel supply structure for an oscillating tricycle characterized by being connected via 前記燃料供給管は、熱可塑性樹脂材料からなり、その外径が大きくとも７ｍｍに形成されることを特徴とする請求項１記載の揺動三輪車の燃料供給構造。   2. The fuel supply structure for a rocking tricycle according to claim 1, wherein the fuel supply pipe is made of a thermoplastic resin material and has an outer diameter of at most 7 mm. 前記燃料供給管は、外径が大きくとも４ｍｍであり、この燃料供給管を支持するために車体側に取付けた支持部材の間隔は小さくとも１５０ｍｍであることを特徴とする請求項２記載の揺動三輪車の燃料供給構造。   3. The vibration according to claim 2, wherein the fuel supply pipe has an outer diameter of at least 4 mm, and a distance between support members attached to the vehicle body side to support the fuel supply pipe is at least 150 mm. Fuel supply structure for moving tricycles.
JP2005222208A 2005-07-29 2005-07-29 Fuel supply structure for rocking tricycle Expired - Fee Related JP4584790B2 (en)

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TW095117083A TW200704876A (en) 2005-07-29 2006-05-15 Fuel supply tube structure of swing tricycle
KR1020060046556A KR100748201B1 (en) 2005-07-29 2006-05-24 Fuel supply structure of moveable three wheeled motor vehicle
CNB2006100917177A CN100432421C (en) 2005-07-29 2006-06-07 Fuel supply structure of rocking three-wheels vehicle

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JP2021066220A (en) * 2019-10-17 2021-04-30 本田技研工業株式会社 Saddle-ride type electric tricycle

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CN100432421C (en) 2008-11-12
TW200704876A (en) 2007-02-01

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