JPS6282217A - Exhaust pipe device for motorcycle - Google Patents
Exhaust pipe device for motorcycleInfo
- Publication number
- JPS6282217A JPS6282217A JP22198885A JP22198885A JPS6282217A JP S6282217 A JPS6282217 A JP S6282217A JP 22198885 A JP22198885 A JP 22198885A JP 22198885 A JP22198885 A JP 22198885A JP S6282217 A JPS6282217 A JP S6282217A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust pipe
- engine
- motorcycle
- length
- pipe device
- 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
Links
Landscapes
- Exhaust Silencers (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は自動二輪車、特にスクータ、モベットなど、
アンダーボーン形の車両に好適な排気管装置に関するも
ので、前輪と後輪との間に配置さfた前傾形エンジンの
損気管装置に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to motorcycles, especially scooters, movettes, etc.
The present invention relates to an exhaust pipe device suitable for an underbone type vehicle, and relates to an exhaust pipe device for a forward-inclined engine arranged between a front wheel and a rear wheel.
従来、アンダービーフ形の車両にはシリンダの軸芯を水
平から10度前後上向きに設置した前傾形エンジンが用
いらnることが多く、その排気管はエンジンから車体の
下部側方へ向けて取り出さn1次いで後方へ向けて転向
させ、そのt\後部に設けた排気消音器へ接続さnてい
る。Conventionally, under-beef type vehicles often use forward-slanted engines in which the axis of the cylinder is installed upward by about 10 degrees from the horizontal, and the exhaust pipe is directed from the engine toward the lower side of the vehicle body. The exhaust n1 is then turned toward the rear and connected to an exhaust muffler installed at the rear.
他方、エンジンは効率よく運転するためには、比較的長
い排気管長を要するが、前傾形エンジンのように排気管
の接続部が地上に近い点に設置さnるものでは、所望の
排気通路長さ得んとす′nば、排気管が消音器よυ後方
へ突出してしまう。逆に排気管を短縮すれば所望のエン
ジン出力か得ら扛なくなる不具合がある。On the other hand, engines require a relatively long exhaust pipe length in order to operate efficiently, but in engines such as forward-leaning engines where the exhaust pipe connection is installed close to the ground, it is difficult to achieve the desired exhaust passage. If you don't get the length, the exhaust pipe will protrude to the rear of the muffler. On the other hand, if the exhaust pipe is shortened, the desired engine output may not be achieved.
この発明は上記不具合を排除し、排気通路の長さを十分
にとシ、なお排気管を車体後方へ長く伸ばす必要のない
排気管装置を得ることを目的とするもので、前輪と後輪
との間に位置して、車体フレームに支持さ牡たエンジン
から下方へ取り出された排気管を、そこから一旦後方へ
屈曲させ、次いで前方へ転向させて平面上を、大略一巻
きした後、車体フレームの下部側方に設けた消音器へ接
続したものである。The purpose of this invention is to eliminate the above-mentioned problems and provide an exhaust pipe device that has a sufficient length of the exhaust passage and does not require the exhaust pipe to extend long toward the rear of the vehicle. The exhaust pipe is taken out downward from the engine, which is supported by the car body frame, and is bent backwards, then turned forward, and wrapped around once on a flat surface, and then attached to the car body. It is connected to a silencer installed on the lower side of the frame.
排気管はエンジンの下面に沿って大略一巻きするように
形成しているから、通路の長さを長くすることができ、
然も車体の前後方向の長さを比較的短小に保つことがで
きる。The exhaust pipe is formed so that it wraps around the bottom of the engine, so the length of the passage can be increased.
Moreover, the length of the vehicle body in the longitudinal direction can be kept relatively short.
以下、図示の実施例によってこの発明を説明すると、図
中、1はモペットでアシ、アンダーボーン形車体フレー
ム2の前端には前フオーク3を介して前輪4が左右転向
自在に支持さnておシ、後方には後述するエンジン7と
後輪6とを連結する駆動軸(図示してない)の軸管を兼
ねたリヤアーム5が上下揺動自在に軸支さnlそのリヤ
アーム5の後端に後輪6が支持されている07は前輪4
と後輪6との間に懸架されたエンジンであシ、この例で
は前傾単気筒の空冷式2行程エンジンである。8はエン
ジン7の下面に接続された排気管であわ、エンジンTの
下面から下方へ取り出された後、一旦、後方へ屈曲させ
、次いで前方へ転向させてエンジン7の底面に沿って一
平面上を、「の」字形に大略一巻きした後、車体フレー
ム2の下部側方に設けた消音器9へ接続さnている0な
お「の」字形との形容は巻き方向を意味せず、巻回する
形状を意味する0
排気管8はエンジン7に接続された定断面積部分8aと
、定断面積部分8aの後端に溶着さn断面積が段階的に
増大する膨脹部分8bとを含んでおシ、定断面積部分8
鼻は鋼?#を屈曲させて作られ、膨脹部分8bは第5図
で示すように、プレス成形された2枚の鋼板からなる上
下の半部8A。The present invention will be explained below with reference to the illustrated embodiment. In the figure, reference numeral 1 denotes a moped, and a front wheel 4 is supported at the front end of an underbone type vehicle body frame 2 via a front fork 3 so as to be able to turn left and right. At the rear, a rear arm 5, which also serves as an axis tube for a drive shaft (not shown) that connects an engine 7 and a rear wheel 6, which will be described later, is pivotably supported so as to be able to swing up and down. 07 on which the rear wheel 6 is supported is the front wheel 4
The engine is suspended between the rear wheels 6 and the rear wheels 6, and in this example, it is a forward-inclined single-cylinder air-cooled two-stroke engine. 8 is an exhaust pipe connected to the bottom surface of the engine 7, and after being taken out from the bottom surface of the engine T, it is bent backwards, then turned forward, and is placed on one plane along the bottom surface of the engine 7. After approximately one winding in the shape of a "", it is connected to the silencer 9 provided on the lower side of the vehicle body frame 2. The exhaust pipe 8 includes a constant cross-sectional area portion 8a connected to the engine 7, and an expanding portion 8b whose cross-sectional area gradually increases, which is welded to the rear end of the constant cross-sectional area portion 8a. Deoshi, constant cross-sectional area part 8
Is the nose made of steel? As shown in FIG. 5, the expansion portion 8b is an upper and lower half portion 8A made of two press-formed steel plates.
8Bをそnらの縁部8Dで重合し溶着したもので、その
直径は前端から段階的に拡大した後その後方に比較的長
く太い低断面積部分を有し、その後部は緩やかに絞ら牡
て消音器9に連結さnている。8B are polymerized and welded at their edges 8D, and the diameter gradually expands from the front end, and then has a relatively long, thick, low cross-sectional area at the rear, and the rear part gradually narrows to form a male. and is connected to a silencer 9.
下半部8Bは逆三角形の底部を有しその断面形状は略五
角形とさnる。よって、太い膨脹部分8bが、目の位置
から見える部分を少なくして細く見えるように配慮しで
ある。The lower half 8B has an inverted triangular bottom, and its cross-sectional shape is approximately pentagonal. Therefore, consideration has been given to making the thick inflated portion 8b appear thinner by reducing the portion visible from the eye position.
この発明は以上のように、エンジンから下方へ取り出さ
れた排気管を、エンジンの下面で略「の」字形に一巻き
した後、車体フレームの下部側方に設けた消音器へ接続
したものであるから、排気通路の長さを短縮することな
く、排気管の全長を短縮することができる。また、実施
例で示すように排気管によってエンジンの下面を覆うよ
うにすnば、車両が悪路を走行する際にも、跳ねた石や
土塊からエンジンを保護することができる等の効果があ
る。As described above, in this invention, the exhaust pipe taken out downward from the engine is wrapped around the bottom surface of the engine in a shape of approximately "2", and then connected to a silencer provided on the lower side of the vehicle body frame. Therefore, the total length of the exhaust pipe can be shortened without shortening the length of the exhaust passage. Furthermore, as shown in the example, by covering the bottom surface of the engine with the exhaust pipe, it is possible to protect the engine from flying stones and clods even when the vehicle is driving on rough roads. be.
図面はこの発明の実施例を示すもので、第1図は自動二
輪車の側面図、第2図は不要部を省略して示す■−■断
面図、第3図はその側面図、第4図は正面図、第5図は
第3図中のv−■断面図である。
7・・・・エンジン、8・・・・排気管、8亀・・・・
定断面積部分、Bb−・・・膨脹部分。The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the motorcycle, FIG. 2 is a sectional view taken along the line II--II with unnecessary parts omitted, FIG. 3 is a side view thereof, and FIG. 4 is a side view of the motorcycle. 5 is a front view, and FIG. 5 is a sectional view taken along line v-■ in FIG. 3. 7...engine, 8...exhaust pipe, 8 turtle...
Constant cross-sectional area part, Bb-... expansion part.
Claims (2)
持されたエンジンから下方へ取り出された排気管を一旦
後方へ屈曲させ、次いで前方へ転向させてそこから一平
面上を、大略一巻きした後、車体フレームの下部側方に
設けた消音器へ接続してなる自動二輪車の排気管装置。(1) The exhaust pipe, which is located between the front wheels and the rear wheels and is taken out downward from the engine supported by a single frame, is bent backwards, then turned forward, and from there on one plane, A motorcycle exhaust pipe device that is connected to a silencer installed on the lower side of the vehicle body frame after being wrapped approximately once.
、そこから断面積が増大する膨脹部分とを含んでいる特
許請求の範囲第1項記載の自動二輪車の排気管装置。(2) The exhaust pipe device for a motorcycle according to claim 1, wherein the exhaust pipe includes a constant cross-sectional area portion having a constant length from the engine, and an expanding portion whose cross-sectional area increases from there.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22198885A JPH0635823B2 (en) | 1985-10-07 | 1985-10-07 | Exhaust pipe device for motorcycles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22198885A JPH0635823B2 (en) | 1985-10-07 | 1985-10-07 | Exhaust pipe device for motorcycles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6282217A true JPS6282217A (en) | 1987-04-15 |
JPH0635823B2 JPH0635823B2 (en) | 1994-05-11 |
Family
ID=16775316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22198885A Expired - Lifetime JPH0635823B2 (en) | 1985-10-07 | 1985-10-07 | Exhaust pipe device for motorcycles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0635823B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7032709B2 (en) * | 2002-08-27 | 2006-04-25 | Andreas Stihl Ag & Co. Kg | Exhaust-gas muffler |
EP1710411A1 (en) * | 2005-03-31 | 2006-10-11 | Kawasaki Jukogyo Kabushiki Kaisha | Exhaust system of engine of motorcycle |
-
1985
- 1985-10-07 JP JP22198885A patent/JPH0635823B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7032709B2 (en) * | 2002-08-27 | 2006-04-25 | Andreas Stihl Ag & Co. Kg | Exhaust-gas muffler |
EP1710411A1 (en) * | 2005-03-31 | 2006-10-11 | Kawasaki Jukogyo Kabushiki Kaisha | Exhaust system of engine of motorcycle |
US7350351B2 (en) | 2005-03-31 | 2008-04-01 | Kawasaki Jukogyo Kabushiki Kaisha | Exhaust system of engine of motorcycle |
Also Published As
Publication number | Publication date |
---|---|
JPH0635823B2 (en) | 1994-05-11 |
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