JPH027222Y2 - - Google Patents
Info
- Publication number
- JPH027222Y2 JPH027222Y2 JP10633187U JP10633187U JPH027222Y2 JP H027222 Y2 JPH027222 Y2 JP H027222Y2 JP 10633187 U JP10633187 U JP 10633187U JP 10633187 U JP10633187 U JP 10633187U JP H027222 Y2 JPH027222 Y2 JP H027222Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- exhaust pipe
- pipe
- base
- inner diameter
- 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
- 239000000463 material Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、板材と管材を別個に成形加工してフ
ランジと排気管を作り、これらを溶接によつて組
立てる形式の排気マニホルドに関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an exhaust manifold in which a flange and an exhaust pipe are formed by separately forming a plate material and a pipe material, and these are assembled by welding.
（従来の技術）
組立式の排気マニホルドは、例えば特開昭61−
250326によつて知られており、この排気マニホル
ドは、鍛造品のヘツド側フランジに管材から作つ
た排気管を溶接して組立てたもので、一般の鋳造
排気マニホルドに比べてエンジン又は車両の軽量
化に役立つている。(Prior art) A prefabricated exhaust manifold is, for example, disclosed in Japanese Patent Application Laid-open No. 1983-
250326, this exhaust manifold is assembled by welding an exhaust pipe made of pipe material to a forged head side flange, which reduces the weight of the engine or vehicle compared to general cast exhaust manifolds. are helpful.
また、本出願人がさきに実願昭62−63519とし
て出願したものは、第３図に示すようにヘツド側
フランジａを板材から成形し、その接続短管ｂに
管材製の排気管ｃを嵌合溶接して軽量化をはかつ
ている。 In addition, in the application previously filed by the present applicant as Utility Application No. 62-63519, as shown in Fig. 3, the head side flange a is formed from a plate material, and the connecting short pipe b is connected to an exhaust pipe c made of pipe material. Welded together to reduce weight.
（考案が解決しようとする問題点）
前記の従来技術において、鍛造フランジを用い
るものは、フランジ各部の肉厚をそれぞれ必要に
応じた厚さにして充分な強度をもたせることはで
きるが、鍛造設備、穴ぐり設備等を必要とすると
共にこれらの設備による加工は生産能率がよくな
い。また、前記の板材から成形する形式のもの
は、排気マニホルドの温度変化により、接続短管
の基部に比較的大きな熱応力が発生すると想定さ
れる。(Problems to be solved by the invention) In the above-mentioned conventional technology, those using forged flanges can have sufficient strength by adjusting the wall thickness of each part of the flange as necessary, but the forging equipment , drilling equipment, etc. are required, and processing using these equipment does not have good production efficiency. Furthermore, in the case of the above-mentioned type formed from a plate material, it is assumed that a relatively large thermal stress will be generated at the base of the connecting short pipe due to temperature changes in the exhaust manifold.
（問題点を解決するための手段）
本考案はこれらの点を解決したもので、その手
段は、ヘツド側フランジに排気管接続用の接続短
管をバーリング加工により突設し、該接続短管に
排気管を嵌合して溶接するようにした排気マニホ
ルドにおいて、接続短管の基部の内径をシリンダ
ヘツドの排気口内径に近似する寸法に形成し、排
気管嵌合部の内径を排気管の肉厚相当量だけ大径
にして前記基部から排気管嵌合部にかけて一連の
湾曲部を形成したことを特徴とする。(Means for solving the problems) The present invention solves these problems, and the means is to protrude a short connecting pipe for connecting the exhaust pipe from the head side flange by burring, and to connect the short connecting pipe to the head side flange. In an exhaust manifold in which an exhaust pipe is fitted and welded, the inner diameter of the base of the connecting short pipe is formed to approximate the inner diameter of the exhaust port of the cylinder head, and the inner diameter of the exhaust pipe fitting part is formed to approximate the inner diameter of the exhaust port of the cylinder head. It is characterized in that the diameter is increased by an amount corresponding to the wall thickness, and a series of curved parts are formed from the base part to the exhaust pipe fitting part.
（作用）
以上の手段により、熱膨張による接続管部及び
排気管の伸縮の一部は、接続短管における基部と
拡径部で形成される湾曲部によつて吸収されて大
きな応力は生じない。また基部と排気管の内径は
略一致するから、絞りのない排気通路が形成され
て排気抵抗が少ない。(Function) With the above means, part of the expansion and contraction of the connecting pipe section and exhaust pipe due to thermal expansion is absorbed by the curved section formed by the base and expanded diameter section of the connecting short pipe, and no large stress is generated. . Furthermore, since the inner diameters of the base and the exhaust pipe are substantially the same, an exhaust passage without a restriction is formed, resulting in less exhaust resistance.
（実施例）
以下本考案の実施例を図面によつて説明する。
第１図において１は排気マニホルドで、２はヘツ
ド側フランジ、３，３…は排気管、４は排気集合
管、５は触媒容器であり、排気管３は耐食製金属
の管材で作られ、その他の部分は同様の金属の板
材から作られる。(Example) Examples of the present invention will be described below with reference to the drawings.
In Fig. 1, 1 is an exhaust manifold, 2 is a head side flange, 3, 3... are exhaust pipes, 4 is an exhaust manifold pipe, 5 is a catalyst container, and the exhaust pipe 3 is made of corrosion-resistant metal pipe material. Other parts are made from similar sheet metal.
ヘツド側フランジ２は、第２図に示すようにエ
ンジンのシリンダヘツド６の排気口７部にガスケ
ツト８を介してねじ９で固定されている。このヘ
ツド側フランジ２には、気筒数に応じた数の接続
短管１０が突設されており、前記排気口７と略同
一内径の管部をバーリング加工により突出させ、
基部１１はそのままにして、先端側を拡径具によ
り拡径して排気管嵌合部１２を形成し、この基部
１１と排気管嵌合部１２によつて曲り方向が反転
した湾曲部１３が形成されている。排気管嵌合部
１２の半径は、基部１１の半径より排気管３の肉
厚分だけ大きくしてあり、これにより同一内径の
一連の排気通路が形成される。 The head side flange 2 is fixed to the exhaust port 7 of the cylinder head 6 of the engine with a gasket 8 and screws 9, as shown in FIG. A number of connection short pipes 10 corresponding to the number of cylinders are protruded from the head side flange 2, and a pipe portion having approximately the same inner diameter as the exhaust port 7 is protruded by burring.
The base 11 is left as it is, and the diameter of the distal end is expanded using a diameter expander to form the exhaust pipe fitting part 12.The base 11 and the exhaust pipe fitting part 12 form a curved part 13 whose bending direction is reversed. It is formed. The radius of the exhaust pipe fitting part 12 is larger than the radius of the base part 11 by the thickness of the exhaust pipe 3, thereby forming a series of exhaust passages having the same inner diameter.
ヘツド側フランジ２の外周には、補強のための
リブ１４が曲折形成され、その内側に前記ねじ９
挿通用の取付穴１５が設けられ、排気管嵌合部１
２内に排気管３を挿入して溶接部１６により固着
される。 A rib 14 for reinforcement is bent and formed on the outer periphery of the head side flange 2, and the screw 9 is provided inside the rib 14 for reinforcement.
A mounting hole 15 for insertion is provided, and the exhaust pipe fitting part 1
The exhaust pipe 3 is inserted into the exhaust pipe 2 and fixed by the welded part 16.
以上の構成により、フランジ２の基部１１と排
気管３は、前記のように同一内径となるため排気
抵抗が小さく、反転した湾曲部１３が形成される
ため、比較的撓み易い。そのため、伝熱性の劣る
耐食製金属を使用しても熱応力の発生が抑えられ
る。 With the above configuration, the base 11 of the flange 2 and the exhaust pipe 3 have the same inner diameter as described above, so the exhaust resistance is small, and since the inverted curved part 13 is formed, it is relatively easy to bend. Therefore, even if a corrosion-resistant metal with poor heat conductivity is used, the generation of thermal stress can be suppressed.
（考案の効果）
以上のとおり、本考案は、シリンダヘツドから
排気管まで略等径の排気通路が形成できて排気抵
抗を少なくすることができ、また湾曲部が形成さ
れるため変形し易く熱応力が小さく、急速に加熱
又は冷却されても無理な力が加わらない効果をも
つ軽量の排気マニホルドが得られる。(Effects of the device) As described above, the device of the present invention can form an exhaust passage with a substantially equal diameter from the cylinder head to the exhaust pipe, thereby reducing exhaust resistance.Also, since a curved portion is formed, it is easy to deform and heat up. A lightweight exhaust manifold with low stress and no excessive force applied even when rapidly heated or cooled can be obtained.
第１図は本考案の実施例の正面図、第２図は第
１図−線矢視図、第３図は従来例の断面図で
ある。
２…ヘツド側フランジ、３…排気管、１０…接
続短管、１１…基部、１２…排気管嵌合部、１３
…湾曲部。
FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a view taken along the line shown in FIG. 1, and FIG. 3 is a sectional view of a conventional example. 2... Head side flange, 3... Exhaust pipe, 10... Connection short pipe, 11... Base, 12... Exhaust pipe fitting part, 13
...Curved section.
Claims (1)
バーリング加工により突設し、該接続短管に排気
管を嵌合して溶接するようにした排気マニホルド
において、接続短管の基部の内径をシリンダヘツ
ドの排気口内径に近似する寸法に形成し、排気管
嵌合部の内径を排気管の肉厚相当量だけ大径にし
て前記基部から排気管嵌合部にかけて一連の湾曲
部を形成したことを特徴とする、排気マニホル
ド。 In an exhaust manifold in which a connecting short pipe for connecting the exhaust pipe is protruded from the head side flange by burring processing, and the exhaust pipe is fitted and welded to the connecting short pipe, the inner diameter of the base of the connecting short pipe is set to the cylinder. A series of curved parts are formed from the base to the exhaust pipe fitting part by increasing the inner diameter of the exhaust pipe fitting part by an amount equivalent to the wall thickness of the exhaust pipe. An exhaust manifold featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10633187U JPH027222Y2 (en) | 1987-07-13 | 1987-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10633187U JPH027222Y2 (en) | 1987-07-13 | 1987-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6413222U JPS6413222U (en) | 1989-01-24 |
| JPH027222Y2 true JPH027222Y2 (en) | 1990-02-21 |
Family
ID=31339740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10633187U Expired JPH027222Y2 (en) | 1987-07-13 | 1987-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027222Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0738647Y2 (en) * | 1989-05-22 | 1995-09-06 | カルソニック株式会社 | Exhaust pipe assembly structure |
| JP2533040Y2 (en) * | 1990-11-26 | 1997-04-16 | カルソニック株式会社 | exhaust manifold |
| JP5543423B2 (en) * | 2011-12-16 | 2014-07-09 | 本田技研工業株式会社 | Exhaust pipe structure of internal combustion engine |
-
1987
- 1987-07-13 JP JP10633187U patent/JPH027222Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6413222U (en) | 1989-01-24 |
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