JPH0226045B2 - - Google Patents
Info
- Publication number
- JPH0226045B2 JPH0226045B2 JP16369182A JP16369182A JPH0226045B2 JP H0226045 B2 JPH0226045 B2 JP H0226045B2 JP 16369182 A JP16369182 A JP 16369182A JP 16369182 A JP16369182 A JP 16369182A JP H0226045 B2 JPH0226045 B2 JP H0226045B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder block
- exhaust
- exhaust pipe
- pipe
- rear cylinder
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
本発明は、自動二輪車、特に車両の前後方向に
Ｖ字状に配列した前部シリンダブロツク及び後部
シリンダブロツクを有するＶ型内燃機関を車体フ
レームに搭載し、前記各シリンダブロツクの側面
に点火栓を配置すると共に前部シリンダブロツク
前面及び後部シリンダブロツク背面にそれぞれ排
気ポートを開口させた自動二輪車における排気管
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorcycle, particularly a V-type internal combustion engine having a front cylinder block and a rear cylinder block arranged in a V-shape in the longitudinal direction of the vehicle, which is mounted on a body frame. The present invention relates to an exhaust pipe device for a motorcycle in which a spark plug is arranged on the side surface of the block and exhaust ports are opened on the front surface of the front cylinder block and the rear surface of the rear cylinder block.
一般に、この種自動二輪車においては、後部シ
リンダブロツクの排気ポートが車両の後方下部に
配設される排気マフラに比較的近接しているた
め、これらの間を曲りの少ない排気管で接続すれ
ば、その排気管長が充分でなく機関の特に低速運
転時に所期の出力性能が発揮されない問題があ
る。 Generally, in this type of motorcycle, the exhaust port of the rear cylinder block is relatively close to the exhaust muffler located at the rear lower part of the vehicle, so if they are connected with an exhaust pipe with less bend, There is a problem in that the length of the exhaust pipe is insufficient and the desired output performance cannot be achieved, especially when the engine is operating at low speeds.
そこで本発明は、後部シリンダブロツクの排気
ポートに接続される排気管を、これが後部シリン
ダブロツクの側面を通過して後方へ屈曲するよう
に配設し、もつて後部シリンダブロツクの排気管
に充分な長さを与え、機関が所期の性能を確実に
発揮できるようにした前記排気管装置を提供する
ことを第１の目的とする。 Therefore, in the present invention, the exhaust pipe connected to the exhaust port of the rear cylinder block is arranged so that it passes through the side surface of the rear cylinder block and is bent rearward, so that the exhaust pipe of the rear cylinder block has sufficient space. A first object of the present invention is to provide the above-mentioned exhaust pipe device which has a long length so that the engine can reliably exhibit the desired performance.
ところで、後部シリンダブロツクの排気管を上
記のように配設すると、その排気管が後部シリン
ダブロツク側面の点火栓の近傍を通過するため、
排気管の放射熱が点火栓に影響し、点火栓の劣化
を多少とも早める不都合を生じる。 By the way, when the exhaust pipe of the rear cylinder block is arranged as described above, the exhaust pipe passes near the spark plug on the side of the rear cylinder block.
The radiant heat of the exhaust pipe affects the ignition plug, causing the inconvenience that the deterioration of the ignition plug is more or less accelerated.
そこで本発明は、前記排気管の、前記点火栓に
対面する外周面に遮熱板を取付けて、排気管の放
射熱が点火栓に影響しないようにした前記排気管
装置を提供することを第２の目的とする。 Therefore, a first object of the present invention is to provide the exhaust pipe device in which a heat shield plate is attached to the outer peripheral surface of the exhaust pipe facing the ignition plug so that the radiant heat of the exhaust pipe does not affect the ignition plug. 2 objectives.
以下、図面により本発明の一実施例について説
明すると、第１図においてオートバイの車体フレ
ームＦには、前、後輪Wf，Wrの中間部において
Ｖ型内燃機関Ｅが搭載される。この内燃機関Ｅ
は、車両の前後方向にＶ字状に配列した前部シリ
ンダブロツク１ｆ及び後部シリンダブロツク１ｒ
と、これ等の基端に結合した共通のクランクケー
ス２とを有し、前部シリンダブロツク１ｆの吸気
ポート３ｆ及び排気ポート４ｆはその背面及び前
面に開口し、また後部シリンダブロツク１ｒの吸
気ポート３ｒ及び排気ポート４ｒはその前面及び
背面にそれぞれ開口し、各吸気ポート３ｆ，３ｒ
に混合気を供給する気化器５ｆ，５ｒが両シリン
ダブロツク１ｆ，１ｒ間のＶ字状空間６に配設さ
れる。また各シリンダブロツク１ｆ，１ｒの左右
両側には点火栓７ｆ，７ｒがそれぞれ装着され
る。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a V-type internal combustion engine E is mounted on a body frame F of a motorcycle at an intermediate portion between front and rear wheels Wf and Wr. This internal combustion engine E
are a front cylinder block 1f and a rear cylinder block 1r arranged in a V-shape in the longitudinal direction of the vehicle.
and a common crankcase 2 connected to their base ends, the intake port 3f and exhaust port 4f of the front cylinder block 1f are open on the back and front sides thereof, and the intake port of the rear cylinder block 1r is open. 3r and exhaust port 4r are opened on the front and back sides respectively, and each intake port 3f, 3r
Carburetors 5f and 5r for supplying air-fuel mixture to the cylinder blocks 1f and 1r are arranged in a V-shaped space 6 between the two cylinder blocks 1f and 1r. Furthermore, spark plugs 7f and 7r are mounted on both left and right sides of each cylinder block 1f and 1r, respectively.
排気ポート４ｆ，４ｒには前部及び後部排気管
８ｆ，８ｒがそれぞれ接続され、前部排気管８ｆ
は、従来普通のように、前部シリンダブロツク１
ｆの前面を下方に通過して後方へ屈曲するように
配設され、そして車体フレームＦの下部右側に配
置される排気マフラ（図示せず）に接続され、後
部排気管８ｒは後部シリンダブロツク１ｒの背面
から左側面に向つて屈曲してから左側方を斜め下
方に通過し、その後左側ステツプ９を大きく迂回
して後方へ屈曲するように配設され、そして車体
フレームＦの下部左側に配置される排気マフラ１
０に接続される。 Front and rear exhaust pipes 8f and 8r are connected to the exhaust ports 4f and 4r, respectively, and the front exhaust pipe 8f
As usual, the front cylinder block 1
The rear exhaust pipe 8r is arranged so as to pass downward through the front surface of the vehicle body frame F and bend rearward, and is connected to an exhaust muffler (not shown) disposed on the lower right side of the vehicle body frame F, and the rear exhaust pipe 8r is connected to the rear cylinder block 1r. It is arranged so that it bends from the back side toward the left side, passes diagonally downward on the left side, then largely detours around the left side step 9 and bends backward, and is arranged on the left side of the lower part of the vehicle body frame F. Exhaust muffler 1
Connected to 0.
第２図に示すように、後部排気管８ｒは一重管
１１と二重管１２とより構成され、一重管１１は
排気ポート４ｒの開口部から始まつて後部シリン
ダブロツク１ｒの左側面途中で終る上部区間に配
設され、二重管１２は一重管１１の終端から始ま
つて排気マフラ１０の前端部で終る下部区間に配
設される。而して上部区間は屈曲部が比較的急で
あるが、曲げ加工の容易な一重管１１はこの区間
に容易に配管することができ、また下部区間は屈
曲部が比較的緩やかであるので、曲げ加工の困難
な二重管１２でもこの区間に容易に配管すること
ができる。 As shown in FIG. 2, the rear exhaust pipe 8r is composed of a single pipe 11 and a double pipe 12, and the single pipe 11 starts from the opening of the exhaust port 4r and ends midway on the left side of the rear cylinder block 1r. The double pipe 12 is arranged in the upper section, and the double pipe 12 is arranged in the lower section starting from the end of the single pipe 11 and ending at the front end of the exhaust muffler 10. Although the upper section has a relatively steep bend, the easily bendable single pipe 11 can be easily installed in this section, and the lower section has a relatively gentle bend. Even a double pipe 12 that is difficult to bend can be easily installed in this section.
二重管１２の内管１２ａ及び外管１２ｂは、両
端部を除いて断熱空隙１３を存して嵌合し、その
両端部は互いに密合して結合される。この二重管
１２の上端部に一重管１１の下端部が嵌入されて
から両者は溶接１４される。この溶接後、一重管
１１及び二重管１２、即ち後部排気管８ｒ全体が
メツキ処理される。 The inner tube 12a and the outer tube 12b of the double tube 12 fit together with a heat insulating gap 13 in between except for both ends, and the ends are tightly coupled to each other. The lower end of the single pipe 11 is fitted into the upper end of the double pipe 12, and then the two are welded 14. After this welding, the single pipe 11 and the double pipe 12, that is, the entire rear exhaust pipe 8r is plated.
第１図ないし第５図に示すように、一重管１１
には、点火栓７ｒとの対向面を含む外側面を覆う
遮熱板１５が次のように取付けられる。 As shown in FIGS. 1 to 5, the single pipe 11
A heat shield plate 15 is attached as follows to cover the outer surface including the surface facing the ignition plug 7r.
遮熱板１５は横断面が半円状をなしており、そ
の内面に二本の第１バンド１６1が多孔の間隔板
１７を介して固着されている。間隔板１７は第１
バンド１６1と遮熱板１５との間に一定の断熱間
隙１８を形成するもので、遮熱板１５と第１バン
ド１６1とにそれぞれ部分的に溶接される複数個
の凸部１９，２０を有する。第１バンド１６1の
一端には第２バンド１６2がフツク結合２１され、
第１及び第２バンド１６1，１６2は協働して一重
管１１の外周面を緊締するように、これらの連結
端片１６ａ，１６ｂがボルト２２及びナツト２３
により連結される。その際、遮熱板１５の位置決
めのために、一方の組のバンド１６1，１６2の連
結端片１６ａ，１６ｂは、一重管１１の外周面に
突設した位置決め突片２４を挟んでこれとも連結
される。 The heat shield plate 15 has a semicircular cross section, and two first bands 16 1 are fixed to the inner surface of the heat shield plate 15 via a porous spacer plate 17 . The spacing plate 17 is the first
A constant heat insulation gap 18 is formed between the band 16 1 and the heat shield plate 15, and a plurality of convex portions 19, 20 are partially welded to the heat shield plate 15 and the first band 16 1 , respectively. has. A second band 16 2 is hook-coupled 21 to one end of the first band 16 1 ;
These connecting end pieces 16a, 16b are connected to bolts 22 and nuts 23 so that the first and second bands 16 1 and 16 2 cooperate to tighten the outer peripheral surface of the single pipe 11.
connected by. At this time, in order to position the heat shield plate 15, the connecting end pieces 16a and 16b of one set of bands 16 1 and 16 2 are held together with the positioning protrusion 24 protruding from the outer peripheral surface of the single pipe 11 in between. It is also connected.
遮熱板１５の外面には長円形の化粧リング２５
が付設される。 An oval decorative ring 25 is provided on the outer surface of the heat shield plate 15.
is attached.
而して、点火栓７ｒと後部排気管８ｒとの間を
仕切るように配置された遮熱板１５は、後部排気
管８ｒの放射熱を遮つて点火栓７ｒへの影響を防
止し、また遮熱板１５は一重管１１の外面をも覆
うから、一重管１１が排気熱による過熱のために
外面に変色を起こしても、外観を損うことがな
い。一方、二重管１２は、内、外管１２ａ，１２
ｂの間に遮熱空隙１３を設けているから、外管１
２ｂが過熱されることはなく、したがつてその外
面に過熱による変色が現われることはない。 The heat shield plate 15 arranged to partition the spark plug 7r and the rear exhaust pipe 8r blocks the radiant heat of the rear exhaust pipe 8r to prevent it from affecting the spark plug 7r. Since the hot plate 15 also covers the outer surface of the single tube 11, even if the outer surface of the single tube 11 becomes discolored due to overheating due to exhaust heat, the appearance will not be damaged. On the other hand, the double pipe 12 has inner and outer pipes 12a, 12
Since the heat shielding gap 13 is provided between the outer tube 1
2b is not overheated and therefore no discoloration due to overheating appears on its outer surface.
また、第６図ないし第８図に示すように、二重
管１２の後端部及び排気マフラ１０の前端部に
は、これらの特に接続部を覆う化粧板２６が次の
ように取付けられる。 Further, as shown in FIGS. 6 to 8, a decorative plate 26 is attached to the rear end of the double pipe 12 and the front end of the exhaust muffler 10 in the following manner to cover especially the connecting portions thereof.
化粧板２６は二重管１２及び排気マフラ１０の
上面及び側面に沿うよう横断面が円弧状をなして
おり、その前部内面に二本の第１バンド２７1が
間隔片２８を介して固着されている。第１バンド
２７1の一端には第２バンド２７2がそれぞれ結合
され、これら第１及び第２バンド２７1，２７2は
協働して二重管１２の外周面を緊締するように、
これらの連結端片２７ａ，２７ｂがボルト３０及
びナツト３１により連結される。その際、化粧板
２６の位置決めのために、一方の組のバンド２７
１，２７2の連結端片２７ａ，２７ｂは、二重管１
２の外周面に突設した位置決め突片３２を挟んで
これとも連結される。化粧板２６の後部内面に
は、それとの間に支持孔３３を形成する支持板３
４が固着され、その支持孔３３に係合する係止爪
３５が排気マフラ１０の外周面に固着されてい
る。したがつて、化粧板２６は上記係止爪３５及
びバンド１６1，１６2によつて定位置に取付けら
れる。 The decorative board 26 has an arcuate cross section along the top and side surfaces of the double pipe 12 and the exhaust muffler 10, and two first bands 271 are fixed to the inner surface of the front part through the spacer pieces 28. has been done. A second band 27 2 is connected to one end of the first band 27 1, and these first and second bands 27 1 and 27 2 cooperate to tighten the outer peripheral surface of the double pipe 12.
These connecting end pieces 27a, 27b are connected by bolts 30 and nuts 31. At that time, in order to position the decorative board 26, one set of bands 27
The connecting end pieces 27a and 27b of 1 and 27 2 are connected to the double pipe 1
It is also connected to this via a positioning protrusion 32 protruding from the outer circumferential surface of 2. A support plate 3 forming a support hole 33 between the decorative plate 26 and the rear inner surface of the decorative plate 26 is provided.
4 is fixed to the exhaust muffler 10, and a locking pawl 35 that engages with the support hole 33 is fixed to the outer peripheral surface of the exhaust muffler 10. Therefore, the decorative plate 26 is fixed in position by the locking pawl 35 and the bands 16 1 and 16 2 .
以上のように本発明によれば、後部シリンダブ
ロツクの排気ポートに接続される排気管を、これ
が後部シリンダブロツクの側面を通過して後方へ
屈曲するように配設したので、後部シリンダブロ
ツクの排気ポートと排気マフラ間の距離が短くと
も、前記排気管に充分な長さを与えて機関に所期
の性能を発揮させることができ、しかも機関側面
の広い範囲を通過する前記排気管は機関側面を流
れる走行風により良好に冷却され、機関の性能を
更に向上させることができる。 As described above, according to the present invention, the exhaust pipe connected to the exhaust port of the rear cylinder block is arranged so that it passes through the side surface of the rear cylinder block and is bent rearward. Even if the distance between the port and the exhaust muffler is short, the exhaust pipe can be given sufficient length to allow the engine to exhibit the desired performance, and the exhaust pipe, which passes through a wide area on the side of the engine, The wind flowing through the engine cools the engine well, further improving engine performance.
また、前記排気管の、後部シリンダブロツク側
面に配置された点火栓に対面する外周面に遮熱板
を取付けたので、排気管の放射熱が点火栓に影響
することを防止し、点火栓の過熱による早期劣化
を予防することができる。 In addition, a heat shield plate is attached to the outer peripheral surface of the exhaust pipe facing the ignition plug located on the side of the rear cylinder block, which prevents the radiant heat of the exhaust pipe from affecting the ignition plug. Early deterioration due to overheating can be prevented.
図面は本発明の一実施例を示すもので、第１図
はオートバイの側面図、第２図はそのオートバイ
の排気管上部を遮熱板の離脱状態で示す部分縦断
側面図、第３図は遮熱板の装着状態で示す第２図
と同様の側面図、第４図はその平面図、第５図は
第３図の−線拡大断面図、第６図は排気管と
排気マフラとの接続部付近の部分縦断側面図、第
７図及び第８図は第６図の−線及び−線
断面図である。
Ｅ……内燃機関、Ｆ……車体フレーム、１ｆ，
１ｒ……前、後部シリンダブロツク、４ｒ……排
気ポート、７ｒ……点火栓、８ｒ……排気管、１
０……排気マフラ、１５……遮熱板。
The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a motorcycle, FIG. 2 is a partial vertical side view showing the upper part of the exhaust pipe of the motorcycle with the heat shield removed, and FIG. 3 is a side view of the motorcycle. FIG. 4 is a plan view, FIG. 5 is an enlarged sectional view taken along the - line in FIG. 3, and FIG. 6 is a side view similar to FIG. 7 and 8 are partial longitudinal sectional side views of the vicinity of the connecting portion, and are sectional views taken along the line - and - of FIG. 6, respectively. E...Internal combustion engine, F...Vehicle frame, 1f,
1r...front and rear cylinder block, 4r...exhaust port, 7r...ignition plug, 8r...exhaust pipe, 1
0...exhaust muffler, 15...heat shield plate.
Claims (1)
ンダブロツク及び後部シリンダブロツクを有する
Ｖ型内燃機関を車体フレームに搭載し、前記各シ
リンダブロツクの側面に点火栓を配置すると共に
前部シリンダブロツク前面及び後部シリンダブロ
ツク背面にそれぞれ排気ポートを開口させた自動
二輪車において、前記後部シリンダブロツクの排
気ポートに接続される排気管を、これが後部シリ
ンダブロツクの側面を通過して後方へ屈曲するよ
うに配設し、前記排気管の、前記点火栓に対面す
る外周面に遮熱板を取付けてなる、自動二輪車に
おける排気管装置。1. A V-type internal combustion engine is mounted on a vehicle body frame, and has a front cylinder block and a rear cylinder block arranged in a V-shape in the longitudinal direction of the vehicle, and spark plugs are arranged on the sides of each cylinder block, and the front cylinder block In a motorcycle in which exhaust ports are opened at the front and rear cylinder blocks, respectively, the exhaust pipe connected to the exhaust port of the rear cylinder block is arranged so that it passes through the side surface of the rear cylinder block and is bent rearward. An exhaust pipe device for a motorcycle, comprising: a heat shield plate attached to an outer circumferential surface of the exhaust pipe facing the spark plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16369182A JPS5953230A (en) | 1982-09-20 | 1982-09-20 | Exhaust pipe device for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16369182A JPS5953230A (en) | 1982-09-20 | 1982-09-20 | Exhaust pipe device for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5953230A JPS5953230A (en) | 1984-03-27 |
| JPH0226045B2 true JPH0226045B2 (en) | 1990-06-07 |
Family
ID=15778764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16369182A Granted JPS5953230A (en) | 1982-09-20 | 1982-09-20 | Exhaust pipe device for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6438949B1 (en) | 1999-10-25 | 2002-08-27 | Honda Giken Kogyo Kabushiki Kaisha | Cover member attachment structure |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612767A (en) * | 1985-03-01 | 1986-09-23 | Caterpillar Inc. | Exhaust manifold shield |
| JPH0297185U (en) * | 1989-01-19 | 1990-08-02 | ||
| JP2014070580A (en) * | 2012-09-28 | 2014-04-21 | Honda Motor Co Ltd | Exhaust system of saddle type vehicle |
| JP6648197B2 (en) * | 2018-06-26 | 2020-02-14 | 本田技研工業株式会社 | Exhaust system for motorcycle |
| US10974783B2 (en) | 2018-08-17 | 2021-04-13 | Harley-Davidson Motor Company Group, LLC | Exhaust shield assembly |
| FR3148777A1 (en) * | 2023-05-17 | 2024-11-22 | Renault S.A.S | Silencer device of a motor vehicle comprising a silencer and an aerodynamic deflector |
-
1982
- 1982-09-20 JP JP16369182A patent/JPS5953230A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6438949B1 (en) | 1999-10-25 | 2002-08-27 | Honda Giken Kogyo Kabushiki Kaisha | Cover member attachment structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5953230A (en) | 1984-03-27 |
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