JPH02130211A - Exhaust device for motor cycle - Google Patents

Exhaust device for motor cycle

Info

Publication number
JPH02130211A
JPH02130211A JP28145188A JP28145188A JPH02130211A JP H02130211 A JPH02130211 A JP H02130211A JP 28145188 A JP28145188 A JP 28145188A JP 28145188 A JP28145188 A JP 28145188A JP H02130211 A JPH02130211 A JP H02130211A
Authority
JP
Japan
Prior art keywords
exhaust
exhaust pipes
vehicle body
pipes
exhaust pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP28145188A
Other languages
Japanese (ja)
Other versions
JP2805482B2 (en
Inventor
Atsushi Ono
敦史 大野
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha 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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP28145188A priority Critical patent/JP2805482B2/en
Publication of JPH02130211A publication Critical patent/JPH02130211A/en
Application granted granted Critical
Publication of JP2805482B2 publication Critical patent/JP2805482B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Exhaust Silencers (AREA)

Abstract

PURPOSE:To make it possible to prevent an exhaust gas from oscillating, while enhancing the assembly ability of an exhaust pipe by arranging a support free intermediate section, vertically in the side part of a vehicle body, and by connecting adjacent exhaust pipes with the use of a coupling member. CONSTITUTION:Exhaust pipes 2 are held, in its intermediate section, in a support free condition, excepting their front and rear end parts 2f, 2e coupled to exhaust ports of an engine 1 and a muffler 3. The intermediate sections of the two exhaust pipes 2, 2 corresponding to the side part of a vehicle body are laid vertically, and accordingly, the width of the vehicle may be prevented from being increased. Further, the intermediate sections of the two exhaust pipes 2, 2 are coupled together with the use of a coupling member 6. With this arrangement, the exhaust pipes 2, 2 bind together so as to give a large rigidity as a whole of the exhaust pipe assembly. Accordingly, it is possible to prevent occurrence of oscillation even though the intermediate section is in a support free condition.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は多気筒エンジンを搭載した自動二輪車の排気装
置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an exhaust system for a motorcycle equipped with a multi-cylinder engine.

〔従来技術〕[Prior art]

多気筒エンジンを搭載した自動二輪車では、多数本の排
気管によってエンジン排気口から車体後部に設置した消
音器までの間を連結するようにしている。このように連
結された排気管は非常に長尺なものとなっているため、
その前後両端部を固定しただけでは中間部に振れを生じ
、走行中にフートレスト等の他部品と干渉する等の問題
を生ずる。
In motorcycles equipped with multi-cylinder engines, multiple exhaust pipes connect the engine exhaust port to a silencer installed at the rear of the vehicle body. Since the exhaust pipes connected in this way are extremely long,
If only the front and rear end portions are fixed, the intermediate portion will swing, causing problems such as interference with other parts such as the footrest during driving.

しかし、排気管の中間部を車体に支持固定するようにす
ると、製作上不可避的に発生する寸法誤差によって排気
管の組付性を悪くし、その組付性の悪化から生産性を低
下してしまう。特に、多気筒エンジンのように、排気管
の数が多くなればなるほど組付作業は繁雑になり、この
問題を大きくすることになる。また、排気管の中間部を
支持ステーで固定するようにすると、排気管の途中に配
設されたフートレストやブレーキレバーのレイアウト範
囲を制約したり、またブレーキレバーの操作範囲を制約
したりするなどの問題もある。
However, when the middle part of the exhaust pipe is supported and fixed to the vehicle body, the dimensional errors that inevitably occur during manufacturing make it difficult to assemble the exhaust pipe, and this poor assemblability reduces productivity. Put it away. Particularly, as in the case of a multi-cylinder engine, as the number of exhaust pipes increases, the assembly work becomes more complicated, which exacerbates this problem. In addition, if the middle part of the exhaust pipe is fixed with a support stay, the layout range of the footrest and brake lever placed in the middle of the exhaust pipe will be restricted, and the operating range of the brake lever will be restricted. There is also the problem of

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明の目的は、上述した従来の問題を解消し、多気筒
エンジンにおける排気管の組付性を向上しながら、しか
も排気管の振れ防止を可能にし、また他部品のレイアウ
トを制約しないようにする自動二輪車の排気装置を提供
することにある。
The purpose of the present invention is to solve the above-mentioned conventional problems, improve the ease of assembling an exhaust pipe in a multi-cylinder engine, and prevent the exhaust pipe from swinging, and also to avoid restricting the layout of other parts. An object of the present invention is to provide an exhaust system for a motorcycle.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成する本発明は、多気筒エンジンの排気口
から片側当たり少なくとも2本の排気管を車体側部に通
し、車体後部の消音器に連結するようにした自動二輪車
において、前記少なくとも2本の排気管を、エンジン排
気口に対する接続部から消音器に対する接続部までの間
を支持フリーの状態にし、この支持フリーの中間部を車
体側部において上下に配置すると共に、互いに隣接する
排気管同士を中空の連結部材で連結するようにしたこと
を特徴とするものである。
To achieve the above object, the present invention provides a motorcycle in which at least two exhaust pipes per side are passed from the exhaust port of a multi-cylinder engine to the side of the vehicle body and connected to a muffler at the rear of the vehicle body. The exhaust pipes are made free of support between the connection to the engine exhaust port and the connection to the muffler, and the free support intermediate parts are placed vertically on the side of the vehicle body, and adjacent exhaust pipes are placed in a free-support state. This feature is characterized in that the two are connected by a hollow connecting member.

〔実施例〕〔Example〕

以下、本発明を図に示す実施例によって説明する。 Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

第1図は本発明の排気装置を装備した自動二輪車を示し
、1は並列2気筒のエンジン、2はエンジン1の各気筒
毎に設けられた排気管、3は車体後部の片側に固定され
た消音器である。
Figure 1 shows a motorcycle equipped with the exhaust system of the present invention, where 1 is a parallel two-cylinder engine, 2 is an exhaust pipe provided for each cylinder of engine 1, and 3 is fixed to one side of the rear of the vehicle body. It's a silencer.

2本の排気管2,2は、それぞれ前端部2fをエンジン
排気口に連結され、車体の片側から車体側部を通り、後
端部2eを上記消音器3に連結するようにしている。そ
して、中間部は支持ステーなどによって車体に固定され
ることなくフリー状態になっている。すなわち、各排気
管2はエンジン排気口と消音器3とに前後端部2f、 
 2eを連結されるだけで、その中間部は支持フリーの
状態になっている。
The two exhaust pipes 2, 2 each have a front end 2f connected to an engine exhaust port, pass through the side of the vehicle from one side of the vehicle, and connect a rear end 2e to the muffler 3. The intermediate portion is not fixed to the vehicle body by a support stay or the like and is in a free state. That is, each exhaust pipe 2 has a front and rear end 2f at the engine exhaust port and the muffler 3,
2e are simply connected, and the intermediate portion is free from support.

4は足を載せるためのフートレストで、排気管2,2の
外側に位置するが、支持アームは排気管2,2の下側を
潜って車体フレームに固定されている。5はフートレス
ト4の外側に配置されたブレーキレバーである。これら
フートレスト4とブレーキレバー5の前後に、排気管2
゜2の外側を覆うようにしたプロテクタ7.8が配置さ
れている。9はタンデムフートレストである。
Reference numeral 4 denotes a footrest on which to place one's feet, which is located outside the exhaust pipes 2, 2, and a support arm that goes under the exhaust pipes 2, 2 and is fixed to the vehicle body frame. 5 is a brake lever arranged outside the footrest 4. Exhaust pipes 2 are installed before and after these footrests 4 and brake levers 5.
A protector 7.8 is arranged to cover the outside of the 2.degree. 9 is a tandem footrest.

第2図および第3図に詳細を示すように、2本の排気管
2,2は、車体側部に相当する中間部を上下に配置され
、それによって車体幅を拡げないようにしている。また
、この上下の排気管2.2は、それらの中間部を連結部
材6によって互いに連結されている。この連結部材6の
連結により、排気管2.2同士は互いに他方を拘束し合
い、排気管全体として大きな剛性を発揮し、中間部が支
持フリーでありながら振れを発生することがないように
なっている。
As shown in detail in FIGS. 2 and 3, the two exhaust pipes 2, 2 are arranged one above the other in the middle portion corresponding to the side portion of the vehicle body, thereby preventing the width of the vehicle body from increasing. Further, the upper and lower exhaust pipes 2.2 are connected to each other at their intermediate portions by a connecting member 6. By connecting the connecting member 6, the exhaust pipes 2 and 2 restrain each other, and the exhaust pipe as a whole exhibits great rigidity, and even though the middle part is free of support, no vibration occurs. ing.

第4図に示すように、上記連結部材6は、二つの板金が
最中状に合体して中空構造になっており、この中空構造
によって2本の排気管2゜2の内部同士を互いに連通ず
るようにしている。
As shown in FIG. 4, the connecting member 6 has a hollow structure made by combining two metal plates in the middle, and this hollow structure connects the insides of the two exhaust pipes 2. I'm trying to communicate.

また、図示の実施例では、連結部材6の中空横断面積が
排気管2のそれと実質的に同一になるようにしである。
Furthermore, in the illustrated embodiment, the hollow cross-sectional area of the connecting member 6 is substantially the same as that of the exhaust pipe 2.

すなわち、連結部材6の内径Daと排気管2の内径De
とが実質的に同一になっている。このように2本の排気
管2.2が互いに連通した状態となっていることにより
、一方の排気管の脈動波が他方の排気管に及び、いわゆ
る脈動効果によるエンジンの出力向上をもたらすように
している。
That is, the inner diameter Da of the connecting member 6 and the inner diameter De of the exhaust pipe 2
are substantially the same. With the two exhaust pipes 2.2 communicating with each other in this way, the pulsating waves from one exhaust pipe reach the other exhaust pipe, resulting in an increase in engine output due to the so-called pulsating effect. ing.

上述したように、上記自動二輪車に装備された排気装置
は、車体の片側当たり少なくとも2本配置するようにし
た排気管2,2を、エンジン排気口と車体後部の消音器
3とに連結するだけで、中間部を支持フリーの状態にし
ているので、その適度の撓みを利用することによってエ
ンジン排気口と消音器に対する組付性を容易にすること
ができる。また、中間部を支持フリーにして車体との間
に特別の支持ステーを設けないので、フートレストやブ
レーキレバーなどの他部品のレイアウト範囲を制約した
り、あるいはブレーキレバーの操作範囲を制約したりす
ることがない。
As described above, the exhaust system installed on the motorcycle simply connects the exhaust pipes 2, 2, which are arranged at least two per side of the vehicle body, to the engine exhaust port and the muffler 3 at the rear of the vehicle body. Since the intermediate portion is free from support, it is possible to easily assemble the engine exhaust port and the muffler by utilizing its appropriate flexure. In addition, since the middle part is free for support and no special support stay is provided between it and the vehicle body, the layout range of other parts such as the footrest and brake lever is restricted, or the operation range of the brake lever is restricted. Never.

また、2本の排気管は車体側部で上下に配設されている
ので、車体幅を拡げることがなく、コンパクトな構造に
することができる。
In addition, since the two exhaust pipes are arranged one above the other on the side of the vehicle body, the vehicle body width does not need to be increased and the structure can be made compact.

また、排気管の中間部を支持フリーの状態にしてあって
も、その中間部を連結部材で互いに連結しているため、
排気管同士の相互の拘束によって剛性を発揮し、中間部
に振れを発生しないようにしている。また、連結部材を
中空構造にし、排気管の内部同士を連通ずる関係にして
いるので、排気脈動波の脈動効果によってエンジンの出
力を向上をもたらすこともできる。
In addition, even if the middle part of the exhaust pipe is left unsupported, the middle part is connected to each other by the connecting member, so
The mutual restraint of the exhaust pipes provides rigidity and prevents vibrations in the middle. Furthermore, since the connecting member has a hollow structure so that the insides of the exhaust pipes communicate with each other, the output of the engine can be improved by the pulsating effect of the exhaust pulsating waves.

〔発明の効果〕〔Effect of the invention〕

上述したように本発明は、多気筒エンジンの排気口から
片側当たり少なくとも2本の排気管を車体側部に通し、
車体後部の消音器に連結するようにした自動二輪車にお
いて、前記少なくとも2本の排気管を、エンジン排気口
に対する接続部から消音器に対する接続部までの間を支
持フリーの状態にし、この支持フリーの中間部を車体側
部において上下に配置すると共に、互いに隣接する排気
管同士を中空の連結部材で連結するようにしたので、排
気管の組付性を向上しながら、しかも排気管の振れを防
止することができる。また、他部品のレイアウトや操作
範囲を制約することもない。
As described above, the present invention allows at least two exhaust pipes per side to pass from the exhaust port of a multi-cylinder engine to the side of the vehicle body,
In a motorcycle configured to be connected to a silencer at the rear of the vehicle body, the at least two exhaust pipes are free from support between the connection to the engine exhaust port and the connection to the silencer, and the support is free. The intermediate parts are arranged vertically on the side of the vehicle body, and adjacent exhaust pipes are connected with a hollow connecting member, which improves the ease of assembling the exhaust pipe and prevents the exhaust pipe from swinging out. can do. Furthermore, there is no restriction on the layout or operation range of other parts.

また、複数の排気管を設けながら、車体幅をコンパクト
にすることができる。
Further, the width of the vehicle body can be made compact while providing a plurality of exhaust pipes.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の排気装置を装備した自動二輪車を示す
側面図、第2図は同自動二輪車の車体の片側に配置され
た排気装置の側面図、第3図は同排気装置の平面図、第
4図は同排気装置の排気管中間部の連結部材部分を断面
にして示す拡大図である。 1・・・エンジン、2・・・排気管、3・・・消音器、
6・・・連結部材。
Fig. 1 is a side view of a motorcycle equipped with the exhaust system of the present invention, Fig. 2 is a side view of the exhaust system disposed on one side of the body of the motorcycle, and Fig. 3 is a plan view of the exhaust system. , and FIG. 4 is an enlarged cross-sectional view of a connecting member portion at the intermediate portion of the exhaust pipe of the same exhaust system. 1... Engine, 2... Exhaust pipe, 3... Silencer,
6...Connecting member.

Claims (1)

【特許請求の範囲】[Claims]  多気筒エンジンの排気口から片側当たり少なくとも2
本の排気管を車体側部に通し、車体後部の消音器に連結
するようにした自動二輪車において、前記少なくとも2
本の排気管を、エンジン排気口に対する接続部から消音
器に対する接続部までの間を支持フリーの状態にし、こ
の支持フリーの中間部を車体側部において上下に配置す
ると共に、互いに隣接する排気管同士を中空の連結部材
で連結するようにした自動二輪車の排気装置。
At least 2 per side from the exhaust port of a multi-cylinder engine
In a motorcycle in which an exhaust pipe is passed through the side of the vehicle body and connected to a silencer at the rear of the vehicle body, the at least two
The exhaust pipes of the main body are free from support between the connection to the engine exhaust port and the connection to the muffler, and the free support intermediate portions are arranged vertically on the side of the vehicle body, and the exhaust pipes are adjacent to each other. An exhaust system for a motorcycle that connects the two with a hollow connecting member.
JP28145188A 1988-11-09 1988-11-09 Exhaust system for motorcycle Expired - Fee Related JP2805482B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28145188A JP2805482B2 (en) 1988-11-09 1988-11-09 Exhaust system for motorcycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28145188A JP2805482B2 (en) 1988-11-09 1988-11-09 Exhaust system for motorcycle

Publications (2)

Publication Number Publication Date
JPH02130211A true JPH02130211A (en) 1990-05-18
JP2805482B2 JP2805482B2 (en) 1998-09-30

Family

ID=17639362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28145188A Expired - Fee Related JP2805482B2 (en) 1988-11-09 1988-11-09 Exhaust system for motorcycle

Country Status (1)

Country Link
JP (1) JP2805482B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100696881B1 (en) * 2006-05-01 2007-03-20 한창훈 The accessory of shoes string
JP2011156952A (en) * 2010-01-29 2011-08-18 Honda Motor Co Ltd Exhaust system for motorcycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100696881B1 (en) * 2006-05-01 2007-03-20 한창훈 The accessory of shoes string
JP2011156952A (en) * 2010-01-29 2011-08-18 Honda Motor Co Ltd Exhaust system for motorcycle

Also Published As

Publication number Publication date
JP2805482B2 (en) 1998-09-30

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