JPH057532B2 - - Google Patents
Info
- Publication number
- JPH057532B2 JPH057532B2 JP58140210A JP14021083A JPH057532B2 JP H057532 B2 JPH057532 B2 JP H057532B2 JP 58140210 A JP58140210 A JP 58140210A JP 14021083 A JP14021083 A JP 14021083A JP H057532 B2 JPH057532 B2 JP H057532B2
- Authority
- JP
- Japan
- Prior art keywords
- expansion chamber
- exhaust
- pipe
- welding
- wall
- 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 - Lifetime
Links
- 238000003466 welding Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000011491 glass wool Substances 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 1
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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers
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】
本発明は内燃機関の排気装置に関し、さらに詳
しくは多気筒の内燃機関用に好適な排気装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust system for an internal combustion engine, and more particularly to an exhaust system suitable for a multi-cylinder internal combustion engine.
多気筒エンジンを搭載した自動二輪車等の車輛
に設ける排気装置として、複数本の排気管を板金
製の箱状膨脹室にいつたん集束し、この膨脹室の
排気側から別の排気管を介して大気中へ排気する
ようにしたものがある。上記膨脹室は板金製であ
るため、そのままの構成では排気脈動により壁面
が振動し、大きなシエル音を発生する。従来、こ
のシエル音を無くすため膨脹室内面にグラスウー
ルをパンチメタルで固定したり、あるいは上下に
渡る支柱を固定するなどの手段が講ぜられている
が、前者のグラスウールを固定する手段は重量増
加を招き、またコスト高になる欠点があり、また
後者は支柱が排気に流動抵抗を与え、エンジン出
力の低下を招く欠点がある。 As an exhaust system installed in a vehicle such as a motorcycle equipped with a multi-cylinder engine, multiple exhaust pipes are converged into a box-shaped expansion chamber made of sheet metal, and the exhaust pipe is connected from the exhaust side of this expansion chamber to another exhaust pipe. Some are designed to exhaust air into the atmosphere. Since the expansion chamber is made of sheet metal, if it is configured as is, the wall surface will vibrate due to exhaust pulsation, and a loud shell noise will be generated. Conventionally, measures have been taken to eliminate this shell noise, such as fixing glass wool to the inside of the expansion chamber with punched metal, or fixing struts that extend above and below, but the former method of fixing glass wool increases the weight. In the latter case, the struts provide flow resistance to the exhaust gas, resulting in a reduction in engine output.
本発明の目的は上述のような問題に鑑み、重量
増加を招いたり、あるいは排気に抵抗を与えるよ
うなことのない、低コストで製作可能にする内燃
機関の排気装置を提供せんとすることにある。 SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an exhaust system for an internal combustion engine that does not increase weight or provide resistance to exhaust gas and can be manufactured at low cost. be.
上記目的を達成する本発明は、内燃機関に接続
される複数本の排気管を板金製の箱状の膨脹室に
集束し、該膨脹室の排気側から別の排気管を介し
て大気側へ排気すべくした排気装置において、前
記複数本の排気管を前記膨脹室の内側へ深く挿入
し、この排気管の挿入部の外壁と膨脹室の内壁と
の間を溶接固定したことを特徴とするものであ
る。 The present invention achieves the above object by converging a plurality of exhaust pipes connected to an internal combustion engine into a box-shaped expansion chamber made of sheet metal, and from the exhaust side of the expansion chamber to the atmosphere side via another exhaust pipe. In the exhaust device for exhausting air, the plurality of exhaust pipes are deeply inserted into the expansion chamber, and the outer wall of the insertion portion of the exhaust pipes and the inner wall of the expansion chamber are fixed by welding. It is something.
以下、本発明を図に示す実施例により説明す
る。 Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.
第1図は、4気筒エンジンを搭載した自動二輪
車用の本発明による排気装置を示すものである。 FIG. 1 shows an exhaust system according to the present invention for a motorcycle equipped with a four-cylinder engine.
4本の排気管1,1,1,1は屈曲した前端側
を、図示しないエンジンの各気筒にそれぞれ接続
されるようになつており、後端側を排気管の一部
となるデフユーザ管5,5,5,5を介して板金
製の箱状の膨脹室2に接続集束されている。排気
管1とデフユーザ管5とはバンド6により締付固
定されている。膨脹室2の他端側には別の排気管
3,3が接続され、消音器4を介して大気中に連
通している。 The four exhaust pipes 1, 1, 1, 1 have their bent front ends connected to respective cylinders of an engine (not shown), and their rear ends connected to a differential user pipe 5 which becomes a part of the exhaust pipes. , 5, 5, 5 to a box-shaped expansion chamber 2 made of sheet metal. The exhaust pipe 1 and the differential user pipe 5 are fastened and fixed by a band 6. Another exhaust pipe 3, 3 is connected to the other end of the expansion chamber 2 and communicates with the atmosphere via a muffler 4.
第2,3図は膨脹室2部分の詳細を示すもので
ある。膨脹室2は半割状にした板金製の上板2a
と下板2bとが合体し、その継目が溶接されて箱
状になつている。この膨脹室2の表面には補強用
リブ8が設けられている。排気管の一部を構成す
るデフユーザ管5は、膨脹室2の入口端において
周囲が溶接固定されると共に、後端側を奥深く内
側へ挿入されており、その挿入部の外壁と膨脹室
2の内壁との間をプラグ溶接され、第4図に示す
ような溶接部7を有する固定構造になつている。
排気側の排気管3は膨脹室2の出口端において周
囲を溶接固定されるが、必要により上記デフユー
ザ管5と同様に前端側を膨脹室2内に奥深く挿入
し、その挿入部を膨脹室2の内壁との間でプラグ
溶接してもよい。 Figures 2 and 3 show details of two parts of the expansion chamber. The expansion chamber 2 is made of a half-split sheet metal upper plate 2a.
and the lower plate 2b are combined and their joints are welded to form a box shape. A reinforcing rib 8 is provided on the surface of the expansion chamber 2. The differential user pipe 5, which constitutes a part of the exhaust pipe, has its periphery fixed by welding at the entrance end of the expansion chamber 2, and its rear end side is inserted deep inside, so that the outer wall of the insertion part and the expansion chamber 2 It is plug welded to the inner wall and has a fixed structure having a welded portion 7 as shown in FIG.
The exhaust pipe 3 on the exhaust side is fixed by welding around the periphery at the outlet end of the expansion chamber 2, but if necessary, the front end side is inserted deep into the expansion chamber 2 in the same way as the differential user pipe 5, and the inserted part is inserted into the expansion chamber 2. Plug welding may be performed between the inner wall of the
上記膨脹室2の上下板2a,2bとデフユーザ
管5と排気管3との組立ては、まず全体を組付け
状態にして上板2aと下板2bとの継目に沿つて
溶接を行い、デフユーザ管5及び排気管3に対し
ては上板2a又は下板2bに沿う一方の半周分を
まず溶接し、次いで最後の残りの半周分を溶接す
るようにすればよい。 To assemble the upper and lower plates 2a and 2b of the expansion chamber 2, the differential user pipe 5, and the exhaust pipe 3, first, the entire assembly is assembled, welding is performed along the joint between the upper plate 2a and the lower plate 2b, and the differential user pipe is assembled. 5 and the exhaust pipe 3, one half of the circumference along the upper plate 2a or the lower plate 2b may be welded first, and then the remaining half of the circumference may be welded.
上述した排気装置によると、排気管の一部を構
成する複数本のデフユーザ管5の後端が、膨脹室
2の内側へ深く挿入され、その挿入部が膨脹室2
の内壁との間で溶接固定されているため、このデ
フユーザ管5の挿入部が膨脹室2の強度メンバー
として作用し、薄い板金製の膨脹室2の剛性を向
上する。そのため、膨脹室2が排気脈動によつて
振動を行つて大きなシエル音を発生することがな
い。また、膨脹室内面にグラスウールを厚く貼着
する従来構造のように重量増加を招くことがな
く、かつ低コストであり、さらに上下に掛け渡さ
れた支柱のように排気の流動抵抗を増大すること
もない。 According to the above-described exhaust system, the rear ends of the plurality of differential user tubes 5 constituting a part of the exhaust pipe are deeply inserted into the inside of the expansion chamber 2, and the insertion portion is inserted into the expansion chamber 2.
Since the insertion portion of the differential user tube 5 acts as a strength member of the expansion chamber 2, it improves the rigidity of the expansion chamber 2 made of a thin sheet metal. Therefore, the expansion chamber 2 does not vibrate due to the exhaust pulsation and generate a loud shell noise. In addition, unlike the conventional structure in which glass wool is pasted thickly on the inside of the expansion chamber, it does not increase the weight and is low cost. Furthermore, it does not increase the flow resistance of the exhaust air like struts that are stretched over the top and bottom. Nor.
なお、上記実施例では膨脹室2の内壁面とデフ
ユーザ管5の挿入部外壁面との溶接をプラグ溶接
で行つているが、この溶接を他の溶接法によつて
行つてもよい。また、溶接個所は実施例では上下
2個所であるが、さらに溶接個所を多くすること
も差し支えない。 In the above embodiment, the inner wall surface of the expansion chamber 2 and the outer wall surface of the insertion portion of the differential user tube 5 are welded together by plug welding, but this welding may be performed by other welding methods. Furthermore, although the number of welding locations is two, upper and lower, in the embodiment, there is no problem in increasing the number of welding locations.
上述したように本発明は、内燃機関に接続され
る複数本の排気管を板金製の箱状の膨脹室に集束
し、該膨脹室の排気側から別の排気管を介して大
気側へ排気すべくした排気装置において、前記複
数本の排気管を前記膨脹室の内側へ深く挿入し、
この排気管の挿入部の外壁と膨脹室の内壁との間
を溶接固定したので、排気管の挿入部が膨脹室の
強度メンバーとして作用し、板金製膨脹室の剛性
を向上させるため、排気脈動により膨脹室が振動
して大きなシエル音を発生することがない。しか
も、従来のグラスウールを貼着した構造のように
重量増加を招くことがなく、かつ低コストで製作
することができる。また、支柱を設ける場合のよ
うに排気に流動抵抗を与えることもないので、エ
ンジンの出力低下を招くこともない。 As described above, the present invention converges a plurality of exhaust pipes connected to an internal combustion engine into a box-shaped expansion chamber made of sheet metal, and exhausts from the exhaust side of the expansion chamber to the atmosphere side via another exhaust pipe. In the desired exhaust system, inserting the plurality of exhaust pipes deep into the expansion chamber,
Since the outer wall of the insertion part of the exhaust pipe and the inner wall of the expansion chamber are fixed by welding, the insertion part of the exhaust pipe acts as a strength member of the expansion chamber, and in order to improve the rigidity of the sheet metal expansion chamber, the exhaust pulsation This prevents the expansion chamber from vibrating and producing loud cries. Furthermore, unlike the conventional structure in which glass wool is pasted, there is no increase in weight, and it can be manufactured at low cost. Furthermore, unlike the case where struts are provided, there is no flow resistance to the exhaust gas, so there is no reduction in engine output.
第1図は4気筒エンジンを搭載した自動二輪車
用の本発明の実施例による排気装置の平面図、第
2図は同排気装置の膨脹室部分の平面図、第3図
は第2図の−矢視断面図、第4図は第3図の
−矢視断面図である。
1,3…排気管、2…膨脹室、5…デフユーザ
管(排気管)、7…溶接部。
FIG. 1 is a plan view of an exhaust system according to an embodiment of the present invention for a motorcycle equipped with a four-cylinder engine, FIG. 2 is a plan view of an expansion chamber portion of the same exhaust system, and FIG. FIG. 4 is a sectional view taken along the - arrow in FIG. 3. 1, 3... Exhaust pipe, 2... Expansion chamber, 5... Differential user pipe (exhaust pipe), 7... Welded part.
Claims (1)
製の箱状の膨脹室に集束し、該膨脹室の排気側か
ら別の排気管を介して大気側へ排気すべくした排
気装置において、前記複数本の排気管を前記膨脹
室の内側へ深く挿入し、この排気管の挿入部の外
壁と膨脹室の内壁との間を溶接固定したことを特
徴とする内燃機関の排気装置。1. An exhaust system in which a plurality of exhaust pipes connected to an internal combustion engine are converged into a box-shaped expansion chamber made of sheet metal, and the exhaust is discharged from the exhaust side of the expansion chamber to the atmosphere through another exhaust pipe, An exhaust system for an internal combustion engine, characterized in that the plurality of exhaust pipes are deeply inserted into the expansion chamber, and the outer wall of the insertion portion of the exhaust pipes and the inner wall of the expansion chamber are fixed by welding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14021083A JPS6032920A (en) | 1983-07-30 | 1983-07-30 | Exhauster of internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14021083A JPS6032920A (en) | 1983-07-30 | 1983-07-30 | Exhauster of internal-combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6032920A JPS6032920A (en) | 1985-02-20 |
JPH057532B2 true JPH057532B2 (en) | 1993-01-29 |
Family
ID=15263475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14021083A Granted JPS6032920A (en) | 1983-07-30 | 1983-07-30 | Exhauster of internal-combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6032920A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07109170B2 (en) * | 1985-11-26 | 1995-11-22 | ヤマハ発動機株式会社 | Exhaust system for multi-cylinder engine |
JPH0778370B2 (en) * | 1985-11-26 | 1995-08-23 | ヤマハ発動機株式会社 | 4-stroke engine controller |
US4840029A (en) * | 1986-03-07 | 1989-06-20 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust gas control means for engine |
US4999999A (en) * | 1987-09-14 | 1991-03-19 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust gas control device for motorcycles |
JP2966554B2 (en) * | 1991-02-22 | 1999-10-25 | ヤマハ発動機株式会社 | O2 sensor arrangement structure for exhaust system for motorcycle |
US5351481A (en) * | 1992-06-26 | 1994-10-04 | Flowmaster, Inc. | Muffler assembly with balanced chamber and method |
DE19645619A1 (en) * | 1996-11-06 | 1998-05-07 | Emitec Emissionstechnologie | Exhaust pipe system for removing exhaust gas from an internal combustion engine |
JP2004195193A (en) | 2002-10-22 | 2004-07-15 | Noritaka Kimura | Wheelchair with automatic brake |
JP2007162653A (en) * | 2005-12-16 | 2007-06-28 | Kawasaki Heavy Ind Ltd | Exhaust device for vehicle and motorcycle having exhaust device |
WO2010064256A1 (en) * | 2008-12-04 | 2010-06-10 | Rajeev Madhukar Ranadive | Automotive exhaust system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5722017B2 (en) * | 1975-07-17 | 1982-05-11 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5722017U (en) * | 1980-07-14 | 1982-02-04 |
-
1983
- 1983-07-30 JP JP14021083A patent/JPS6032920A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5722017B2 (en) * | 1975-07-17 | 1982-05-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS6032920A (en) | 1985-02-20 |
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