JP2638912B2 - Exhaust chamber of underbone type motorcycle - Google Patents
Exhaust chamber of underbone type motorcycleInfo
- Publication number
- JP2638912B2 JP2638912B2 JP8928888A JP8928888A JP2638912B2 JP 2638912 B2 JP2638912 B2 JP 2638912B2 JP 8928888 A JP8928888 A JP 8928888A JP 8928888 A JP8928888 A JP 8928888A JP 2638912 B2 JP2638912 B2 JP 2638912B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust chamber
- exhaust pipe
- exhaust
- type motorcycle
- muffler
- 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.)
- Expired - Fee Related
Links
Landscapes
- Exhaust Silencers (AREA)
- Characterised By The Charging Evacuation (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、アンダーボーン型自動二輪車の排気チャ
ンバーに関する。Description: TECHNICAL FIELD The present invention relates to an exhaust chamber of an underbone type motorcycle.
〔従来の技術とその問題点〕 自動二輪車は、車体の前部に搭載したエンジンに連結
した排気管を車体の下側から側方に導きながら後方に伸
し、後端に筒形のマフラを連結し、マフラを車体側方下
部に沿って後側に伸し、後端から排気ガスを放出するよ
うにして、排気ガスが後方に排出されるようにしてい
る。排気ガスは、回転速度によって周波数が変化し、マ
フラを常に出力に良好に対応させるのが難しい。一般
に、マフラの前部に排気管の後端を深く挿入し、挿入し
た排気管部分に出力調整孔を設けて、高低速の出力をバ
ランスさせるようにしている。しかし、小型のアンダー
ボーン型自動二輪車では、車体の大きさが小さく、しか
もエンジンのシリンダーが前方に向けて倒してあるの
で、排気管とマフラの全長が小さくなり、マフラ前端の
ディフューザー室も狭く、出力調整高孔がカーボン詰り
を起すようになって効果が低減する不都合がある。又、
オートバイ型のものでは、排気管に排気チャンバーを取
付けたものがある。例えば、特開昭60−101221号公報参
照。しかし、アンダーボーン型では、エンジンの前部及
び上部をレッグシールドでカバーしていて取付けが困難
である。[Conventional technology and its problems] Motorcycles extend rearward while guiding the exhaust pipe connected to the engine mounted on the front of the vehicle body from the lower side to the side, and a cylindrical muffler at the rear end The muffler is extended rearward along the lower side of the vehicle body so that the exhaust gas is discharged from the rear end, so that the exhaust gas is discharged rearward. The frequency of the exhaust gas changes depending on the rotation speed, and it is difficult to always make the muffler properly correspond to the output. Generally, the rear end of the exhaust pipe is inserted deep into the front of the muffler, and an output adjustment hole is provided in the inserted exhaust pipe to balance high-speed and low-speed outputs. However, in a small underbone type motorcycle, the body size is small and the cylinder of the engine is tilted forward, so the total length of the exhaust pipe and muffler is small, and the diffuser room at the front end of the muffler is narrow, There is a disadvantage that the output adjusting high holes cause the carbon to be clogged and the effect is reduced. or,
In some motorcycle types, an exhaust pipe is provided with an exhaust chamber. For example, see JP-A-60-101221. However, in the underbone type, the front and upper parts of the engine are covered with leg shields, and it is difficult to mount the engine.
この発明は、エンジンのシリンダーに前端を連結し側
方から後方に伸するように配置した排気管の前部を前方
に突出させて箱型の排気チャンバーを連結し、レッグシ
ールドに関係なく設置でき、生産性もよいアンダーボー
ン型自動二輪車の排気チャンバーを得ることを目的とす
る。This invention connects the front end to the engine cylinder and connects the box-shaped exhaust chamber by projecting the front part of the exhaust pipe that extends rearward from the side to the front, and can be installed regardless of the leg shield. It is an object of the present invention to obtain an exhaust chamber of an underbone type motorcycle having high productivity.
以下、本発明を図面に示す実施例によって説明する。 Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.
アンダーボーン型自動二輪車はフレーム１の前部が低
い位置にしてあって、シート２の前側に低い部分があっ
て、足が跨げるようにしてある。エンジン３は、フレー
ム１の低くした部分の下側に搭載し、シリンダー４が略
水平に傾けて前方に向けて連結してある。そして、シリ
ンダー４の側方は、レッグシールド５でカバーし、レッ
グシールド５の前部は、左右側方に拡がっていて、走行
による風を防ぐようになっている。排気管６は、前端を
シリンダー４に連結する。排気管６は、前端から車体の
側方に向って伸し後方に曲げて、車体下部一側を後方に
通し、後端にマフラ７を連結する。マフラ７は、車体の
下部側方を後方に向って伸る筒形のものである。排気管
６の前部には、前方に突出させて排気チャンバー８を溶
着する。排気チャンバー８は、箱形にプレス成型した鋼
板を、最中状に合せて溶着した箱型にしてある。排気管
６の排気チャンバー８を連結した部分には、前部に干渉
孔９を穿設して排気チャンバー８の内部と連通させる。
又、後端には、小孔10を穿設する。排気チャンバー８
は、左右のレッグシールド５の内側で、排気管６の下側
に余り突出いないように設ける。図示のものより、もう
少し位置を高くして、排気管６の下部と下面が水平にな
るようにしてもよい。In the underbone type motorcycle, the front portion of the frame 1 is at a low position, and there is a low portion on the front side of the seat 2 so that the foot can be straddled. The engine 3 is mounted below the lowered portion of the frame 1, and a cylinder 4 is inclined substantially horizontally and connected forward. The side of the cylinder 4 is covered with a leg shield 5, and the front of the leg shield 5 extends to the left and right sides to prevent wind from traveling. The exhaust pipe 6 has a front end connected to the cylinder 4. The exhaust pipe 6 extends from the front end toward the side of the vehicle body and bends backward, passes the lower part of the vehicle body rearward, and connects the muffler 7 to the rear end. The muffler 7 has a cylindrical shape extending rearward on the lower side of the vehicle body. An exhaust chamber 8 is welded to the front of the exhaust pipe 6 so as to project forward. The exhaust chamber 8 is formed in a box shape in which a steel plate press-molded in a box shape is welded in the middle. An interference hole 9 is formed at the front of the portion of the exhaust pipe 6 to which the exhaust chamber 8 is connected so as to communicate with the inside of the exhaust chamber 8.
A small hole 10 is formed at the rear end. Exhaust chamber 8
Are provided so as not to protrude much below the exhaust pipe 6 inside the left and right leg shields 5. The lower portion and the lower surface of the exhaust pipe 6 may be leveled slightly higher than those shown.
排気チャンバー８は、干渉孔９で排気管６と連通し、
排気チャンバー８の容積で、排気の脈動波を干渉する。
排気チャンバー８の容積は、エンジン出力が、低速高速
時のバランスが保てるように設定し、乗り易くできる。
排気管６は表面をメッキ仕上げするが、そのとき、排気
チャンバー８内に入るメッキ液は、干渉孔９と小孔10か
ら抜取ることができ、作業性がよい。排気チャンバー８
は、左右のレッグシールド５の間に位置し、合成樹脂製
のレッグシールド５に排気熱の影響が及ばないようにで
きる。そして、排気チャンバー８は、排気管６の前方に
突出させて連結してあるので、ロードクリアランスも確
保できる。The exhaust chamber 8 communicates with the exhaust pipe 6 through an interference hole 9,
The volume of the exhaust chamber 8 interferes with the exhaust pulsating wave.
The volume of the exhaust chamber 8 is set so that the engine output can maintain a balance at low speeds and high speeds, and can be easily driven.
The surface of the exhaust pipe 6 is plated. At this time, the plating solution entering the exhaust chamber 8 can be extracted from the interference holes 9 and the small holes 10 and the workability is good. Exhaust chamber 8
Are located between the left and right leg shields 5 so that the exhaust heat does not affect the leg shields 5 made of synthetic resin. Since the exhaust chamber 8 is connected to the exhaust pipe 6 by protruding forward from the exhaust pipe 6, a load clearance can be secured.
以上説明したように、この発明は、フレーム前部を低
い位置に下げ、該フレームの下部にシリンダーを前方に
向けたエンジンを懸架したものに於て、シリンダーに前
端を連結する排気管を車体の一側に曲げて後方に伸し、
後端にマフラを連結し、排気管の一側に曲げた部分の前
側に箱型の排気チャンバーを前方に向けて溶着し、排気
管の排気チャンバーを溶着した前部に干渉孔を穿設し、
後端に小孔を穿設したので、排気チャンバーで排気ガス
の脈動波を干渉させ、エンジン出力を高低速バランスさ
せることができ、短い排気管とマフラで、乗り易いバラ
ンスのとれた出力にできる。そして、排気管はメッキ仕
上げのとき、干渉孔と小孔からメッキ液が抜けて作業性
がよい。又、排気チャンバーは中央近くに配置できて左
右のレッグシールドの内側にあって、レッグシールドに
熱害を与えることがなく、排気チャンバーを排気管の前
方に突出させて連結してあるので、ロードクリアランス
も確保できる。As described above, the present invention lowers the front part of the frame to a low position and suspends the engine with the cylinder facing forward at the lower part of the frame. Bend to one side and extend backward,
A muffler is connected to the rear end, a box-shaped exhaust chamber is welded forward on the front side of the part bent to one side of the exhaust pipe, and an interference hole is drilled in the front part where the exhaust chamber of the exhaust pipe is welded. ,
With a small hole at the rear end, pulsating waves of exhaust gas can interfere in the exhaust chamber, engine output can be balanced at high and low speeds, and a short exhaust pipe and muffler can provide a balanced output that is easy to ride. . When the exhaust pipe is plated, the plating solution escapes from the interference holes and the small holes, and the workability is good. In addition, the exhaust chamber can be located near the center and is inside the left and right leg shields, does not cause heat damage to the leg shields, and the exhaust chamber is projected forward and connected to the exhaust pipe, so load Clearance can be secured.
図は本発明の一実施例を示し、第１図は全体の左側面
図、第２図は要部を拡大した右側面図、第３図は排気管
の一部縦断平面図、第４図は第３図Ａ−Ａ矢視横断面
図、第５図は排気管の左側面図である。 １……フレーム、３……エンジン、４……シリンダー、
６……排気管、７……マフラ、８……排気チャンバー、
９……干渉孔、10……小孔。1 shows an embodiment of the present invention, FIG. 1 is a left side view of the whole, FIG. 2 is a right side view in which main parts are enlarged, FIG. 3 is a partially vertical plan view of an exhaust pipe, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 5 is a left side view of the exhaust pipe. 1 ... frame, 3 ... engine, 4 ... cylinder,
6 ... exhaust pipe, 7 ... muffler, 8 ... exhaust chamber,
9 ... interference hole, 10 ... small hole.
Claims (1)
ムの下部にシリンダーを前方に向けたエンジンを懸架し
たものに於て、シリンダーに前端を連結する排気管を車
体の一側に曲げて後方に伸し、後端にマフラを連結し、
排気管の一側に曲げた部分の前側に箱型の排気チャンバ
ーを前方に向けて溶着し、排気管の排気チャンバーを溶
着した前部に干渉孔を穿設し、後端に小孔を穿設したこ
とを特徴とするアンダーボーン型自動二輪車の排気チャ
ンバー。An exhaust pipe connecting a front end to a cylinder is bent toward one side of a vehicle body when an engine having a cylinder facing forward is suspended at a lower portion of the frame. Extend backward, connect the muffler to the rear end,
A box-shaped exhaust chamber is welded forward on the front side of the bent part of the exhaust pipe, an interference hole is drilled at the front of the exhaust pipe where the exhaust chamber is welded, and a small hole is drilled at the rear end. An exhaust chamber for an underbone-type motorcycle, characterized by being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8928888A JP2638912B2 (en) | 1988-04-13 | 1988-04-13 | Exhaust chamber of underbone type motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8928888A JP2638912B2 (en) | 1988-04-13 | 1988-04-13 | Exhaust chamber of underbone type motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01262312A JPH01262312A (en) | 1989-10-19 |
| JP2638912B2 true JP2638912B2 (en) | 1997-08-06 |
Family
ID=13966511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8928888A Expired - Fee Related JP2638912B2 (en) | 1988-04-13 | 1988-04-13 | Exhaust chamber of underbone type motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2638912B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5608530B2 (en) * | 2010-12-08 | 2014-10-15 | 本田技研工業株式会社 | Saddle riding |
-
1988
- 1988-04-13 JP JP8928888A patent/JP2638912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01262312A (en) | 1989-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2161187A1 (en) | Motorcycle | |
| JP4092134B2 (en) | Front turn signal mounting structure for motorcycles | |
| JP2638912B2 (en) | Exhaust chamber of underbone type motorcycle | |
| KR20020071749A (en) | Step holder system of motorcycle | |
| JP2002284067A (en) | Pillion step holder structure for motorcycle | |
| JP2008056008A (en) | Cover structure for motorcycle | |
| CN213594080U (en) | Rear suspension arrangement structure of engine rear extension type | |
| JPH0144555B2 (en) | ||
| JPS60176876A (en) | Frame for motorcycle | |
| JP2777617B2 (en) | Motorcycle frame | |
| JPS5979483U (en) | Scooter engine cooling system | |
| JPH01212683A (en) | Frame for motorcycle | |
| JPH0466380A (en) | Front fender for motorcycle | |
| JP2995194B2 (en) | Motorcycle | |
| JPH0347993Y2 (en) | ||
| JPS60105582U (en) | Motorcycle front fender | |
| JPH0228077A (en) | Intake air introducing device for motorcycle | |
| JP2538605Y2 (en) | Motorcycle frame cover | |
| JPH10305792A (en) | Traveling wind intake device for motorcycle | |
| JP2629202B2 (en) | Motorcycle engine suspension | |
| JPH03128787A (en) | Motorcycle | |
| JP2991209B2 (en) | Dry sump lubrication system for motorcycles | |
| JP2784180B2 (en) | Motorcycle | |
| JP3020183B2 (en) | Motorcycle air intake system | |
| JP2869795B2 (en) | Motorcycle body frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |