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JPH1016854A - Engine cooling structure for scooter vehicle - Google Patents

Engine cooling structure for scooter vehicle

Info

Publication number
JPH1016854A
JPH1016854A JP8167246A JP16724696A JPH1016854A JP H1016854 A JPH1016854 A JP H1016854A JP 8167246 A JP8167246 A JP 8167246A JP 16724696 A JP16724696 A JP 16724696A JP H1016854 A JPH1016854 A JP H1016854A
Authority
JP
Japan
Prior art keywords
step floor
wind
air guide
engine
undercover
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
Application number
JP8167246A
Other languages
Japanese (ja)
Other versions
JP4145370B2 (en
Inventor
Takeo Igari
武男 猪狩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP16724696A priority Critical patent/JP4145370B2/en
Priority to TW87219554U priority patent/TW584096U/en
Priority to IT97TO000480A priority patent/IT1293920B1/en
Priority to CN97112778A priority patent/CN1086653C/en
Publication of JPH1016854A publication Critical patent/JPH1016854A/en
Application granted granted Critical
Publication of JP4145370B2 publication Critical patent/JP4145370B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To sufficiently secure the flow passage area of a wind introducing passage provided in the lower surface of a step floor for supplying cooling wind to an engine and to prevent muddy water or the like splashed by a front wheel from entering the wind introducing passage. SOLUTION: A wind introducing passage 51 extended in the front and rear directions of a car body is formed between the step floor 10 and the undercover 11 of a scooter vehicle V, and an engine E is placed to face the rear end opening part of this wind introducing passage 51. A wind inlet 53 formed by bending the front end of the undercover 11 faces front upward and thus, cooling wind guided from the front face of a leg shield rear member 9 downward is efficiently introduced to the wing introducing passage 51 and muddy water or the like splashed by a front wheel Wf is effectively prevented from entering the wind introducing passage 51.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、フレームのダウン
チューブの後方を覆うレッグシールドと、レッグシール
ドの下端から後方に延びてライダーの足を支持するステ
ップフロアと、ステップフロアの下面を覆うアンダーカ
バーと、ステップフロアの後方に配置されたエンジンと
を備えたスクータ型車両に関し、特に、そのエンジンの
冷却構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg shield covering the rear of a down tube of a frame, a step floor extending rearward from a lower end of the leg shield to support a rider's feet, and an undercover covering a lower surface of the step floor. More particularly, the present invention relates to a scooter-type vehicle including an engine disposed behind a step floor, and more particularly, to a cooling structure for the engine.

【0002】[0002]

【従来の技術】ステップフロアの下面に車体前後方向に
延びる導風通路を形成し、車体前部から取り入れた冷却
風を前記導風通路を介して車体後部のエンジンに供給す
るものが、実公昭63−4713号公報により公知であ
る。
2. Description of the Related Art An air guide passage extending in the front-rear direction of a vehicle body is formed on the lower surface of a step floor, and cooling air taken in from the front of the vehicle body is supplied to an engine at the rear of the vehicle body through the air guide passage. It is known from JP 63-4713.

【0003】[0003]

【発明が解決しようとする課題】ところで、上記従来の
ものは、ステップフロアの下面中央部に設けたトンネル
状凹部を利用して導風通路を形成しているため、その導
風通路の流路断面積を充分に確保することができず、エ
ンジンを効果的に冷却することが難しいという問題があ
った。また導風通路の入口が前下方に向けて開口してい
るので前輪が跳ね上げた泥水等が導風通路に浸入し易
く、これを防止するために導風通路の入口にルーバーを
設ける必要があった。
In the above-mentioned conventional device, the air passage is formed using a tunnel-shaped recess provided in the center of the lower surface of the step floor. There was a problem that it was not possible to secure a sufficient cross-sectional area, and it was difficult to cool the engine effectively. In addition, since the entrance of the air guide passage is opened forward and downward, muddy water and the like that the front wheels jump up easily enter the air guide passage, and it is necessary to provide a louver at the entrance of the air guide passage to prevent this. there were.

【0004】本発明は前述の事情に鑑みてなされたもの
で、エンジンに冷却風を供給する導風通路の流路断面積
を充分に確保するとともに、泥水等が前記導風通路に浸
入するのを防止することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has a sufficient flow passage cross-sectional area of a wind guide passage for supplying cooling air to an engine, and prevents muddy water and the like from entering the wind guide passage. The purpose is to prevent.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に、請求項1に記載された発明は、フレームのダウンチ
ューブの後方を覆うレッグシールドと、レッグシールド
の下端から後方に延びてライダーの足を支持するステッ
プフロアと、ステップフロアの下面を覆うアンダーカバ
ーと、ステップフロアの後方に配置されたエンジンとを
備えたスクータ型車両において、ステップフロア及びア
ンダーカバー間にエンジンに冷却風を導く導風通路を形
成し、アンダーカバーの前端をダウンチューブの下端よ
りも前方で上向きに屈曲させることにより、前記導風通
路に冷却風を導く導風口をアンダーカバーの上端とレッ
グシールドの前面との間に上向きに形成したことを特徴
とする。
According to one aspect of the present invention, there is provided a leg shield for covering a rear portion of a down tube of a frame, and extending rearward from a lower end of the leg shield for a rider. In a scooter-type vehicle provided with a step floor for supporting feet, an undercover for covering a lower surface of the step floor, and an engine disposed behind the step floor, a guide for guiding cooling air to the engine between the step floor and the undercover. An air passage is formed, and the front end of the under cover is bent upward in front of the lower end of the down tube, so that a wind guide hole for guiding cooling air to the air guide passage is formed between the upper end of the under cover and the front surface of the leg shield. It is characterized in that it is formed upward.

【0006】また請求項2に記載された発明は、請求項
1の構成に加えて、前記導風口の前方に隣接するフロン
トフェンダーの下端を該導風口の下端よりも下方に位置
させたことを特徴とする。
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the lower end of the front fender adjacent to the front of the air guide port is positioned lower than the lower end of the air guide port. Features.

【0007】また請求項3に記載された発明は、請求項
1の構成に加えて、前記導風通路に燃料タンクを配置し
たことを特徴とする。
According to a third aspect of the present invention, in addition to the configuration of the first aspect, a fuel tank is disposed in the air guide passage.

【0008】[0008]

【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に示した本発明の実施例に基づいて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

【0009】図1〜図8は本発明の一実施例を示すもの
で、図1はスクータ型自動二輪車の全体側面図、図2は
車体中央部の拡大図、図3は車体後部の拡大図、図4は
図2の4方向矢視図、図5は図4の5−5線断面図、図
6は図4の6−6線断面図、図7は図4の7−7線断面
図、図8はスクータ型自動二輪車の全体平面図である。
1 to 8 show an embodiment of the present invention. FIG. 1 is an overall side view of a scooter type motorcycle, FIG. 2 is an enlarged view of a center portion of a vehicle body, and FIG. 3 is an enlarged view of a rear portion of the vehicle body. 4, FIG. 4 is a view in the direction of arrows in FIG. 2, FIG. 5 is a sectional view taken along line 5-5 in FIG. 4, FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG. 8 is an overall plan view of the scooter type motorcycle.

【0010】図1に示すように、スクータ型自動二輪車
Vの骨格を構成する鋼管溶接製フレームFは、車体前下
方に延びるヘッドパイプ1と、ヘッドパイプ1にガセッ
ト2,2を介して結合されて車体後下方に延びるダウン
チューブ3と、ダウンチューブ3の下端近傍から左右に
分岐して車体後上方に延び、後端においてU字状に湾曲
して一体に連なる左右のメインフレーム4,4とを備え
る。左右のメインフレーム4,4の前部とダウンチュー
ブ3の下端とは車体左右方向に延びる補強パイプ5によ
り連結され、また左右のメインフレーム4,4の前後方
向中間部及び後部はそれぞれ車体左右方向に延びる第1
クロスメンバ6及び第2クロスメンバ7により連結され
る。
As shown in FIG. 1, a steel pipe welded frame F which forms a skeleton of a scooter type motorcycle V is connected to a head pipe 1 extending downward in front of the vehicle body and to the head pipe 1 via gussets 2 and 2. A left and right main frames 4 and 4 that branch right and left from near the lower end of the down tube 3 and extend rearward and upward at the rear end, and are curved in a U-shape at the rear end. Is provided. The front portions of the left and right main frames 4 and 4 and the lower end of the down tube 3 are connected by a reinforcing pipe 5 extending in the left and right direction of the vehicle body. Extends to the first
They are connected by the cross member 6 and the second cross member 7.

【0011】フレームFに支持された合成樹脂製のボデ
ィBは、ヘッドパイプ1の前面を覆うレッグシールドフ
ロント部材8と、レッグシールドフロント部材8の後面
に結合されてヘッドパイプ1の後面及びダウンチューブ
3の後面を覆うレッグシールドリヤ部材9と、レッグシ
ールドリヤ部材9の下端に連なるステップフロア10
と、レッグシールドフロント部材8の下端に連なってス
テップフロア10の下面を覆うアンダーカバー11と、
車体後部を覆うリヤカバー12と、リヤカバー12の左
右前部からステップフロア10及びアンダーカバー11
の後端に連なる左右のサイドカバー13,13とから構
成される。ステップフロア10は中央の本体部37と、
その本体部37の左右両側縁に接続される一対の側壁部
38,38との3部材から構成される(図6及び図7参
照)。
A body B made of synthetic resin supported on the frame F includes a leg shield front member 8 for covering the front surface of the head pipe 1 and a rear surface of the head pipe 1 and a down tube connected to the rear surface of the leg shield front member 8. 3 and a step floor 10 connected to the lower end of the leg shield rear member 9.
And an undercover 11 connected to the lower end of the leg shield front member 8 and covering the lower surface of the step floor 10;
A rear cover 12 covering a rear portion of the vehicle body, and a step floor 10 and an under cover 11 from right and left front portions of the rear cover 12.
And right and left side covers 13, 13 connected to the rear end of the vehicle. The step floor 10 has a central main body 37,
It is composed of three members of a pair of side wall portions 38, 38 connected to left and right side edges of the main body portion 37 (see FIGS. 6 and 7).

【0012】ヘッドパイプ1に回転自在に支持されたフ
ロントフォーク14の下端に、上部をフロントフェンダ
ー15により覆われた前輪Wfが軸支される。レッグシ
ールドフロント部材8及びレッグシールドリヤ部材9の
上端開口部を覆うアッパーパネル16から上方に延出す
るハンドルポスト17の上面に、バーハンドル18の左
右方向中央部が結合される。後端に後輪Wrを軸支した
パワーユニットPの前端が第1クロスメンバ6に上下揺
動自在に支持されており、このパワーユニットPと第2
クロスメンバ7とがリヤクッション19により接続され
る。リヤカバー12の上面にライダーが座乗するシート
20が設けられる。
At the lower end of a front fork 14 rotatably supported by the head pipe 1, a front wheel Wf whose upper part is covered by a front fender 15 is pivotally supported. The left and right central portions of the bar handle 18 are joined to the upper surface of the handle post 17 extending upward from the upper panel 16 covering the upper end openings of the leg shield front member 8 and the leg shield rear member 9. The front end of a power unit P that supports the rear wheel Wr at the rear end is supported by the first cross member 6 so as to be vertically swingable.
The cross member 7 is connected by a rear cushion 19. A seat 20 on which a rider sits is provided on the upper surface of the rear cover 12.

【0013】図2及び図4〜図7に示すように、ステッ
プフロア10とアンダーカバー11とによって挟まれた
空間に配置される燃料タンク21は、アッパー部材22
及びロア部材23をフランジ部24により結合してな
り、その後部上面には燃料を補給するためのキャップ2
5が設けられる。左右一対のメインフレーム4,4の外
側面上部に沿って左右一対の燃料タンク取付ステー2
6,26が溶接W1 により固定される。燃料タンク21
のフランジ部24を貫通する左右各2本のボルト27…
を前記燃料タンク取付ステー26,26の下面に設けた
溶接ナット28…に螺入することにより、燃料タンク2
1がメインフレーム4,4に固定される(図2及び図5
参照)。
As shown in FIGS. 2 and 4 to 7, the fuel tank 21 arranged in the space sandwiched between the step floor 10 and the under cover 11 has an upper member 22.
And a lower member 23 are connected by a flange portion 24, and a cap 2 for refueling is provided on the rear upper surface.
5 are provided. A pair of left and right fuel tank mounting stays 2 along the upper outer surfaces of the pair of left and right main frames 4 and 4
6 and 26 are fixed by welding W 1. Fuel tank 21
Two bolts 27 each on the left and right that penetrate the flange 24
Are screwed into welding nuts 28 provided on the lower surfaces of the fuel tank mounting stays 26, 26 so that the fuel tank 2
1 is fixed to the main frames 4 and 4 (see FIGS. 2 and 5).
reference).

【0014】燃料タンク21の前部を固定する左右のボ
ルト27,27によりステップフロア取付ステー29が
共締めされる。ステップフロア取付ステー29は、燃料
タンク21の上部を跨ぐブリッジ部291 と、このブリ
ッジ部291 の左右両端から前方に延びる一対の脚部2
2 ,292 とを有して平面視コ字状に形成されてい
る。脚部291 ,291 の前端下面に設けた溶接ナット
30,30にステップフロア10の本体部37の左右前
部に上方から挿通された2本のボルト31,31が螺入
され、更にブリッジ部291 の中央下面に設けた溶接ナ
ット32にステップフロア10の本体部37の中央前部
に上方から挿通された1本のボルト33が螺入される
(図2及び図4参照)。前記燃料タンク取付ステー2
6,26の下面に設けた溶接ナット35,35にステッ
プフロア10の本体部37の左右後部に上方から挿通さ
れた2本のボルト36,36が螺入される(図2及び図
7参照)。而して、ステップフロア10の本体部37は
前記5本のボルト31,31,33,36,36により
メインフレーム4,4に固定される(図2、図4及び図
7参照)。
A step floor mounting stay 29 is fastened together by left and right bolts 27 for fixing the front portion of the fuel tank 21. Step floor mounting stay 29 includes a bridge portion 29 1 extending over the top of the fuel tank 21, the bridge portion 29 1 of the left and right end pair of leg portions 2 extending forward from
It is formed in a U-shape in plan view having 9 2 and 29 2 . Two bolts 31, 31 inserted from above into the left and right front portions of the main body portion 37 of the step floor 10 are screwed into welding nuts 30, 30 provided on the lower surfaces of the front ends of the leg portions 29 1 , 29 1 , and further a bridge. One bolt 33 inserted from above into the central front portion of the main body portion 37 of the step floor 10 is screwed into the welding nut 32 provided on the lower surface at the center of the portion 291 (see FIGS. 2 and 4). The fuel tank mounting stay 2
Two bolts 36, 36 inserted from above into the left and right rear portions of the main body 37 of the step floor 10 are screwed into the welding nuts 35, 35 provided on the lower surfaces of the steps 6, 26 (see FIGS. 2 and 7). . Thus, the main body 37 of the step floor 10 is fixed to the main frames 4, 4 by the five bolts 31, 31, 33, 36, 36 (see FIGS. 2, 4 and 7).

【0015】次に、アンダーカバー11の固定について
説明する。
Next, the fixing of the undercover 11 will be described.

【0016】図2及び図5から明らかなように、メイン
フレーム4,4の屈曲部の前面に左右一対のブラケット
41,41が溶接W2 されており、このブラケット4
1,41にアンダーカバー11の左右前端部がクリップ
42,42で固定される。図2及び図6から明らかなよ
うに、燃料タンク取付ステー26,26の前部下縁に切
り起こしにより形成した舌片261 ,261 と、アンダ
ーカバー11の左右側縁に形成した上向きの舌片1
1 ,111 とが、ボルト43,43及びナット44,
44で結合される。図2及び図7から明らかなように、
左右のメインフレーム4,4が上向きに立ち上がる部分
にパワーユニットPを支持するパワーユニット支持ブラ
ケット45,45が溶接W3 される。アンダーカバー1
1の左右側縁に形成した内向きの凹部112 ,11
2 が、前記パワーユニット支持ブラケット45,45に
設けた溶接ボルト46,46にボルト47,47で固定
される。
As apparent from FIGS. 2 and 5, a pair of left and right brackets 41, 41 are welded W 2 on the front surface of the bent portion of the main frame 4, 4, the bracket 4
The right and left front ends of the undercover 11 are fixed to the clips 1 and 41 with clips 42 and 42, respectively. As is clear from FIGS. 2 and 6, tongue pieces 26 1 and 26 1 formed by cutting and raising the front lower edges of the fuel tank mounting stays 26 and 26, and upward tongues formed on the left and right side edges of the under cover 11. Piece 1
1 1, 11 1 and is, bolts 43, 43 and nuts 44,
It is joined at 44. As is clear from FIGS. 2 and 7,
The power unit support brackets 45, 45 left and right main frames 4, 4 for supporting the power unit P in a portion rises upward is welded W 3. Under cover 1
Inward concave portions 11 2 , 11 formed on the left and right side edges of 1
2 is fixed to welding bolts 46, 46 provided on the power unit support brackets 45, 45 with bolts 47, 47.

【0017】上述のようにしてアンダーカバー11が固
定されると、そのアンダーカバー11の左右側縁とステ
ップフロア10の本体部37の左右側縁との隙間を塞ぐ
ように、ステップフロア10の左右の側壁部38,38
が固定される。図2、図6及び図7に示すように、ステ
ップフロア10の左右の側壁部38,38は、その上縁
に沿って形成した複数の突起48…を本体部37の側縁
に形成した複数の係止孔49…に係止し、更に側壁部3
8,38に形成した左右各2個の凹部381 …に挿通し
たボルト40…を燃料タンク取付ステー16,16の内
面に設けた溶接ナット39…に螺入することにより固定
される。
When the under cover 11 is fixed as described above, the left and right sides of the step floor 10 are closed so as to close the gap between the left and right side edges of the under cover 11 and the left and right side edges of the main body 37 of the step floor 10. Side walls 38, 38
Is fixed. As shown in FIGS. 2, 6, and 7, the left and right side walls 38, 38 of the step floor 10 have a plurality of projections 48 formed along the upper edge thereof on a side edge of the main body 37. Of the side wall 3
Are fixed by screwing bolts 40 inserted into two left and right recesses 38 1 formed on the right and left of the fuel tank mounting stays 16, 16.

【0018】而して、上側のステップフロア10と下側
のアンダーカバー11との間に前後両端が開口するトン
ネル状の導風通路51が形成され、この導風通路内51
に燃料タンク21が配置される。
Thus, between the upper step floor 10 and the lower under cover 11, a tunnel-shaped air guide passage 51 having both front and rear ends opened is formed.
The fuel tank 21 is disposed at the center.

【0019】図1及び図2に示すように、レッグシール
ドフロント部材8の下部は門形に切り欠かれて開口52
が形成されており、ダウンチューブ3の下端の前方位置
において、前端が上向きに湾曲したアンダーカバー11
の前縁部113 が前記開口52の下端部間に嵌合する。
このようにして、前記導風通路52の前端に、下側をア
ンダーカバー11の前縁部113 により区画され、上側
をレッグシールドリヤ部材9の下部前壁面により区画さ
れ、且つ左右両側をレッグシールドフロント部材8の下
部内壁面により区画された斜め上向きの導風口53が形
成される。前記パワーユニットPの上部及び左右両側部
を覆うリヤカバー12の内部空間に前記導風通路51の
後端開口部が連なっている。フロントフェンダー15の
下端の高さは、導風口53の下端の高さよりも距離Lだ
け低く形成されている(図2参照)。
As shown in FIGS. 1 and 2, the lower portion of the leg shield front member 8 is cut out in a gate shape to form an opening 52.
Is formed at the front position of the lower end of the down tube 3, the front end of which is curved upward.
The front edge portion 11 3 is fitted between the lower end of the opening 52.
In this way, the front end of the air guide passage 52 is partitioned by the front edge portion 11 3 of the under cover 11 and the lower is partitioned by the lower front wall of the leg shield the rear member 9 and the upper side, and the leg right and left sides An obliquely upward air guide port 53 defined by the lower inner wall surface of the shield front member 8 is formed. The rear end opening of the air guide passage 51 is continuous with the inner space of the rear cover 12 that covers the upper part and the left and right sides of the power unit P. The height of the lower end of the front fender 15 is formed lower than the height of the lower end of the air guide port 53 by a distance L (see FIG. 2).

【0020】図1及び図3に示すように、左右のメイン
フレーム4,4に溶接されたパワーユニット支持ブラケ
ット45,45に、リンク機構54を介してパワーユニ
ットPの前端が上下揺動自在に枢支される。パワーユニ
ットPは車体前後方向に延びて内部に伝動装置を収納す
る伝動ケース55を備えており、この伝動ケース55の
前端にシリンダブロックを後傾させたエンジンEが設け
られる。エンジンEのクランクシャフト56の右端に冷
却ファン57が設けられており、この冷却ファン57に
よってエンジンEを覆うシュラウド58内に冷却風が供
給される。
As shown in FIGS. 1 and 3, the front end of the power unit P is pivotally supported by power unit support brackets 45, 45 welded to the left and right main frames 4, 4 via a link mechanism 54 so as to be able to swing up and down. Is done. The power unit P includes a transmission case 55 that extends in the vehicle front-rear direction and houses a transmission therein. An engine E having a cylinder block inclined backward is provided at the front end of the transmission case 55. A cooling fan 57 is provided at the right end of the crankshaft 56 of the engine E, and the cooling fan 57 supplies cooling air into a shroud 58 that covers the engine E.

【0021】伝動ケース55の上部に支持したエアクリ
ーナ59から吸気ダクト60が前方に延びており、この
吸気ダクト60の前端に設けた吸気チャンバー61が左
側のサイドカバー13に形成した開口部131 に臨んで
いる。
The intake duct 60 from an air cleaner 59 which is supported on the top of the transmission case 55 extends forwardly, the opening 13 1 in which the intake chamber 61 provided at the front end of the intake duct 60 is formed on the left side of the side cover 13 I'm coming.

【0022】車体後部を覆うリヤカバー12の上部は円
弧状に湾曲しており、前端がヒンジ62を介して上下揺
動自在に枢支されたシート20は、その上下方向厚さが
前部及び後部において厚く、前後方向中間部において薄
くなっている。シート20の後部のリヤカバー12に、
空気が流通するルーバー63が設けられる。シート20
の下方にはヘルメットH等を収納する物入れ64が形成
される。
The upper portion of the rear cover 12 that covers the rear portion of the vehicle body is curved in an arc shape, and the front end of the seat 20 pivotally supported vertically via a hinge 62 has a vertical thickness of the front portion and the rear portion. , And thin at an intermediate portion in the front-rear direction. On the rear cover 12 at the rear of the seat 20,
A louver 63 through which air flows is provided. Sheet 20
A storage case 64 for storing the helmet H and the like is formed below the storage space.

【0023】而して、自動二輪車Vが走行すると、レッ
グシールドフロント部材8の下部に形成した開口52を
通過した走行風がレッグシールドリヤ部材9の前面に案
内されて下方に流れ、レッグシールドフロント部材8、
レッグシールドリヤ部材9及びアンダーカバー11間に
画成された導風口53から導風通路51に導かれる。こ
のとき、導風口53は前上方を向いて開口しており、且
つ導風口53の下端(即ち、アンダーカバー11の前縁
部113 )の高さはフロントフェンダー15の下端の高
さよりも高い位置にあるため、前輪Wfが後上方に跳ね
上げた泥水等が導風通路51に浸入し難くなっている。
When the motorcycle V travels, the traveling wind passing through the opening 52 formed below the leg shield front member 8 is guided to the front of the leg shield rear member 9 and flows downward, so that the leg shield front member 9 flows. Member 8,
The air is guided to the air guide passage 51 from the air guide port 53 defined between the leg shield rear member 9 and the under cover 11. At this time, the air guide port 53 is open forward and upward, and the height of the lower end of the air guide port 53 (that is, the front edge 11 3 of the under cover 11) is higher than the height of the lower end of the front fender 15. Because of this position, muddy water or the like that the front wheel Wf has jumped up rearward does not easily enter the air guide passage 51.

【0024】導風通路51内を車体後方に流れる冷却風
は燃料タンク21の周囲を通過するため、日照等により
温度上昇した燃料タンク21を効果的に冷却して燃料蒸
気の発生を抑制することができる。ステップフロア10
及びアンダーカバー11間に画成された導風通路51は
充分な流路断面積を有しているため、そこを流れる冷却
風の流速は燃料タンク21との干渉によって大きく低下
することはない。
Since the cooling air flowing rearward of the vehicle body in the air guide passage 51 passes around the fuel tank 21, it is necessary to effectively cool the fuel tank 21 whose temperature has risen due to sunshine or the like to suppress the generation of fuel vapor. Can be. Step floor 10
Since the air guide passage 51 defined between the under cover 11 and the under cover 11 has a sufficient flow passage cross-sectional area, the flow velocity of the cooling air flowing therethrough does not significantly decrease due to interference with the fuel tank 21.

【0025】導風通路51を通過した冷却風は、その後
端開口部からリヤカバー12内に流入する。ルーバー6
3が設けられたリヤカバー12の上面は円弧状に形成さ
れており、そこを通過する走行風の流速が増加してルー
バー63の外部に負圧が発生するため、導風通路51か
らリヤカバー12内に流入した冷却風は前記負圧に吸引
されてルーバー63から外部に排出される。このよう
に、導風通路51から導入された冷却風がリヤカバー1
2の内部をスムーズに流れることにより、パワーユニッ
トPの発熱により温度上昇したリヤカバー12の内部を
効果的に冷却することができる。
The cooling air that has passed through the air guide passage 51 flows into the rear cover 12 from the rear end opening. Louver 6
The upper surface of the rear cover 12 on which the rear cover 3 is provided is formed in an arc shape, and the flow velocity of the traveling wind passing therethrough increases to generate a negative pressure outside the louver 63. Is sucked by the negative pressure and discharged from the louver 63 to the outside. As described above, the cooling air introduced from the air guide passage 51 is supplied to the rear cover 1.
2, the inside of the rear cover 12 whose temperature has risen due to the heat generated by the power unit P can be effectively cooled.

【0026】特に、エンジンEのクランクシャフト56
に設けた冷却ファン57(図3参照)は導風通路51の
後端開口部の直後に位置しているため、その冷却風をシ
ュラウド58内にスムーズに導入してエンジンEの冷却
効果を高めることができる。しかも、車体前部から取り
入れられた冷却風は塵埃等を多く含まないため、エンジ
ンEのエアクリーナ59に清浄な空気を供給することが
できる。
In particular, the crankshaft 56 of the engine E
Since the cooling fan 57 (see FIG. 3) is located immediately after the rear end opening of the air guide passage 51, the cooling air is smoothly introduced into the shroud 58 to enhance the cooling effect of the engine E. be able to. In addition, since the cooling air taken in from the front of the vehicle body does not contain much dust and the like, clean air can be supplied to the air cleaner 59 of the engine E.

【0027】ところで、本実施例の自動二輪車Vは一般
の自動二輪車に比べて長大なバーハンドル18を備えて
いるため、図8に示すようにシート20を起立させて物
入れ64を開放した状態でバーハンドル18を操作する
と、そのバーハンドル18がシート20と干渉する虞が
ある。しかしながら、本実施例のシート20は、その下
面が円弧状に湾曲して前後方向中央部の肉厚が減少して
いるため(図1参照)、その円弧状凹部にバーハンドル
18の先端のグリップ部を回り込ませて前記干渉を回避
することができる。
By the way, the motorcycle V of this embodiment has a bar handle 18 which is longer than that of a general motorcycle. Therefore, as shown in FIG. When the bar handle 18 is operated, the bar handle 18 may interfere with the seat 20. However, since the lower surface of the seat 20 of this embodiment is curved in an arc shape and the thickness of the central portion in the front-rear direction is reduced (see FIG. 1), the grip of the tip of the bar handle 18 is provided in the arc-shaped concave portion. The interference can be avoided by wrapping around the part.

【0028】以上、本発明の実施例を詳述したが、本発
明はその要旨を逸脱しない範囲で種々の設計変更を行う
ことが可能である。
Although the embodiment of the present invention has been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

【0029】[0029]

【発明の効果】以上のように、請求項1に記載された発
明によれば、ステップフロア及びアンダーカバー間に導
風通路を形成したので、その導風通路の流路断面積を充
分に確保し、大量の冷却風をエンジンに供給して冷却効
果を高めることができる。しかもアンダーカバーの前端
をダウンチューブの下端よりも前方で上向きに屈曲させ
ることにより、導風通路に冷却風を導く導風口をアンダ
ーカバーの上端とレッグシールドの前面との間に上向き
に形成したので、レッグシールドによって下向きに案内
された冷却風を効率的に導風通路に導くことが可能とな
るばかりか、前輪により後上方に跳ね上げられた泥水等
が導風通路に浸入するのを阻止することができる。
As described above, according to the first aspect of the present invention, since the air guide passage is formed between the step floor and the under cover, a sufficient flow passage cross-sectional area of the air guide passage is ensured. In addition, a large amount of cooling air can be supplied to the engine to enhance the cooling effect. Moreover, by bending the front end of the undercover upward in front of the lower end of the down tube, the air guide opening for guiding the cooling air to the air guide passage is formed upward between the upper end of the under cover and the front surface of the leg shield. Not only can the cooling air guided downward by the leg shield be efficiently guided to the air guide passage, but also prevent muddy water and the like that has been splashed upward and rearward by the front wheels from entering the air guide passage. be able to.

【0030】また請求項2に記載された発明によれば、
導風口の前方に隣接するフロントフェンダーの下端を該
導風口の下端よりも下方に位置させたので、前輪が後上
方に跳ね上げた泥水等をフロントフェンダーで遮り、導
風通路への浸入を一層効果的に阻止することができる。
According to the second aspect of the present invention,
Since the lower end of the front fender adjacent to the front of the air guide port is positioned lower than the lower end of the air guide port, the front fender blocks muddy water and the like that the front wheel has jumped upward and rearward to further prevent intrusion into the air guide passage. It can be effectively blocked.

【0031】また請求項3に記載された発明によれば、
導風通路に燃料タンクを配置したので、日照等により温
度上昇した燃料タンクを導風通路を流れる冷却風で冷却
することができる。
According to the invention described in claim 3,
Since the fuel tank is disposed in the air guide passage, the fuel tank whose temperature has increased due to sunlight or the like can be cooled by the cooling air flowing through the air guide passage.

【図面の簡単な説明】[Brief description of the drawings]

【図1】スクータ型自動二輪車の全体側面図FIG. 1 is an overall side view of a scooter type motorcycle.

【図2】車体中央部の拡大図FIG. 2 is an enlarged view of a central portion of a vehicle body.

【図3】車体後部の拡大図FIG. 3 is an enlarged view of a rear portion of the vehicle body.

【図4】図2の4方向矢視図4 is a view in the direction of arrows in FIG. 2;

【図5】図4の5−5線断面図FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

【図6】図4の6−6線断面図FIG. 6 is a sectional view taken along line 6-6 in FIG. 4;

【図7】図4の7−7線断面図FIG. 7 is a sectional view taken along line 7-7 of FIG. 4;

【図8】スクータ型自動二輪車の全体平面図FIG. 8 is an overall plan view of the scooter type motorcycle.

【符号の説明】[Explanation of symbols]

3 ダウンチューブ 9 レッグシールドリヤ部材(レッグシール
ド) 10 ステップフロア 11 アンダーカバー 15 フロントフェンダー 21 燃料タンク 51 導風通路 53 導風口 F フレーム
Reference Signs List 3 down tube 9 leg shield rear member (leg shield) 10 step floor 11 under cover 15 front fender 21 fuel tank 51 air guide passage 53 air guide F frame

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 フレーム(F)のダウンチューブ(3)
の後方を覆うレッグシールド(9)と、レッグシールド
(9)の下端から後方に延びてライダーの足を支持する
ステップフロア(10)と、ステップフロア(10)の
下面を覆うアンダーカバー(11)と、ステップフロア
(10)の後方に配置されたエンジン(E)とを備えた
スクータ型車両において、 ステップフロア(10)及びアンダーカバー(11)間
にエンジン(E)に冷却風を導く導風通路(51)を形
成し、アンダーカバー(11)の前端をダウンチューブ
(3)の下端よりも前方で上向きに屈曲させることによ
り、前記導風通路(51)に冷却風を導く導風口(5
3)をアンダーカバー(11)の上端とレッグシールド
(9)の前面との間に上向きに形成したことを特徴とす
る、スクータ型車両におけるエンジン冷却構造。
1. A down tube (3) of a frame (F).
(9), a step floor (10) extending rearward from the lower end of the leg shield (9) to support a rider's feet, and an undercover (11) covering the lower surface of the step floor (10). And an engine (E) disposed behind the step floor (10), wherein the wind guides cooling air to the engine (E) between the step floor (10) and the undercover (11). A passage (51) is formed, and the front end of the undercover (11) is bent upward in front of the lower end of the down tube (3) to thereby guide the cooling air to the wind guide passage (51).
An engine cooling structure for a scooter-type vehicle, wherein 3) is formed upward between the upper end of the under cover (11) and the front surface of the leg shield (9).
【請求項2】 前記導風口(53)の前方に隣接するフ
ロントフェンダー(15)の下端を該導風口(53)の
下端よりも下方に位置させたことを特徴とする、請求項
1記載のスクータ型車両におけるエンジン冷却構造。
2. The front fender (15) adjacent to the front of the air guide port (53) has a lower end located below the lower end of the air guide port (53). Engine cooling structure for scooter type vehicles.
【請求項3】 前記導風通路(51)に燃料タンク(2
1)を配置したことを特徴とする、請求項1記載のスク
ータ型車両におけるエンジン冷却構造。
3. A fuel tank (2) is provided in the air guide passage (51).
The engine cooling structure for a scooter type vehicle according to claim 1, wherein (1) is arranged.
JP16724696A 1996-06-27 1996-06-27 Engine cooling structure for scooter type vehicles Expired - Fee Related JP4145370B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16724696A JP4145370B2 (en) 1996-06-27 1996-06-27 Engine cooling structure for scooter type vehicles
TW87219554U TW584096U (en) 1996-06-27 1997-05-19 Engine cooling structure for scooter-type motorbike
IT97TO000480A IT1293920B1 (en) 1996-06-27 1997-06-02 ENGINE COOLING SYSTEM FOR A SCOOTER.
CN97112778A CN1086653C (en) 1996-06-27 1997-06-19 Cooling structure for engine of small motorcycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16724696A JP4145370B2 (en) 1996-06-27 1996-06-27 Engine cooling structure for scooter type vehicles

Publications (2)

Publication Number Publication Date
JPH1016854A true JPH1016854A (en) 1998-01-20
JP4145370B2 JP4145370B2 (en) 2008-09-03

Family

ID=15846176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16724696A Expired - Fee Related JP4145370B2 (en) 1996-06-27 1996-06-27 Engine cooling structure for scooter type vehicles

Country Status (4)

Country Link
JP (1) JP4145370B2 (en)
CN (1) CN1086653C (en)
IT (1) IT1293920B1 (en)
TW (1) TW584096U (en)

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JP2002130440A (en) * 2000-10-25 2002-05-09 Yamaha Motor Co Ltd Vehicular v belt chamber cooling structure
JP2008280041A (en) * 2003-07-07 2008-11-20 Yamaha Motor Co Ltd Wind guide structure for motorcycle
WO2011037180A1 (en) * 2009-09-25 2011-03-31 ヤマハ発動機株式会社 Two-wheeled motor vehicle
JP2018535350A (en) * 2015-11-13 2018-11-29 ピアッジオ・アンド・シー.・エス.ピー.エー.Piaggio & C. S.P.A. Motorcycle engine cooling system

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* Cited by examiner, † Cited by third party
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JP3961801B2 (en) * 2001-10-01 2007-08-22 ヤマハ発動機株式会社 Scooter type motorcycle
JP4079430B2 (en) * 2003-07-11 2008-04-23 本田技研工業株式会社 Fuel cell vehicle
JP4351021B2 (en) * 2003-10-20 2009-10-28 ヤマハ発動機株式会社 Scooter type motorcycle
CN101624955B (en) * 2004-03-30 2012-11-28 雅马哈发动机株式会社 Saddle ride-type motor vehicle
JP4463639B2 (en) * 2004-08-06 2010-05-19 本田技研工業株式会社 Cooling structure for electric vehicles
JP4563883B2 (en) * 2005-07-14 2010-10-13 本田技研工業株式会社 Scooter-type vehicle body cover structure
JP5602506B2 (en) * 2010-06-11 2014-10-08 本田技研工業株式会社 Saddle riding
CN102225697A (en) * 2011-05-06 2011-10-26 重庆隆鑫机车有限公司 Wind deflector of motorcycle
TWI547392B (en) * 2012-04-16 2016-09-01 Kwang Yang Motor Co With the effect of cooling wind guide locomotive
TWI558583B (en) * 2014-05-30 2016-11-21 Kwang Yang Motor Co Locomotive engine cooling structure
CN105291819B (en) * 2014-06-10 2018-01-16 光阳工业股份有限公司 Heat radiation structure of motorcycle engine
US10569819B2 (en) * 2016-07-08 2020-02-25 Polaris Industries Inc. All-terrain vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445587A (en) * 1981-12-16 1984-05-01 Harley-Davidson Motor Co., Inc. Motorcycle cooling system
US4722412A (en) * 1985-03-01 1988-02-02 Honda Giken Kogyo Kabushiki Kaisha Motorcycle
US4793293A (en) * 1986-03-07 1988-12-27 Honda Giken Kogyo Kabushiki Kaisha Cooling air intake structure for small-sized vehicles
DE4330128C2 (en) * 1993-09-06 1997-08-28 Bayerische Motoren Werke Ag Motorcycle fairing
JPH0796878A (en) * 1993-09-29 1995-04-11 Suzuki Motor Corp Engine cooling device for motorcycle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130440A (en) * 2000-10-25 2002-05-09 Yamaha Motor Co Ltd Vehicular v belt chamber cooling structure
JP2008280041A (en) * 2003-07-07 2008-11-20 Yamaha Motor Co Ltd Wind guide structure for motorcycle
WO2011037180A1 (en) * 2009-09-25 2011-03-31 ヤマハ発動機株式会社 Two-wheeled motor vehicle
JP2018535350A (en) * 2015-11-13 2018-11-29 ピアッジオ・アンド・シー.・エス.ピー.エー.Piaggio & C. S.P.A. Motorcycle engine cooling system

Also Published As

Publication number Publication date
CN1170674A (en) 1998-01-21
JP4145370B2 (en) 2008-09-03
ITTO970480A1 (en) 1998-12-02
TW584096U (en) 2004-04-11
CN1086653C (en) 2002-06-26
ITTO970480A0 (en) 1997-06-02
IT1293920B1 (en) 1999-03-11

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