JP2003083062A - Exhaust manifold - Google Patents
Exhaust manifoldInfo
- Publication number
- JP2003083062A JP2003083062A JP2001280127A JP2001280127A JP2003083062A JP 2003083062 A JP2003083062 A JP 2003083062A JP 2001280127 A JP2001280127 A JP 2001280127A JP 2001280127 A JP2001280127 A JP 2001280127A JP 2003083062 A JP2003083062 A JP 2003083062A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- fan
- shaped cross
- pipes
- section
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、多気筒エンジンの
複数の排気ポートから延びる複数の排気単管の下流端を
扇状断面に形成し、それら複数の排気単管の下流端を円
形に組み合わせて溶接により一体化したエキゾーストマ
ニホールドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms the downstream ends of a plurality of exhaust single pipes extending from a plurality of exhaust ports of a multi-cylinder engine in a fan-shaped cross section, and combines the downstream ends of the plurality of exhaust single pipes in a circular shape. The present invention relates to an exhaust manifold integrated by welding.
【０００２】[0002]
【従来の技術】例えば、自動車用の多気筒エンジンに使
用されるエキゾーストマニホールドは、複数の排気ポー
トから延びる複数の排気単管を一体に集合させるもの
で、その集合部に排気管あるいは直下型の排気ガス浄化
装置が接続される。円形断面を有する排気管あるいは排
気ガス浄化装置に複数の排気単管を滑らかに接続するた
めに、例えば４気筒エンジン用のエキゾーストマニホー
ルドでは各々の排気単管の下流端が９０°の中心角を有
する扇状断面に加工され、４本の排気単管の下流端が円
形断面になるように束ねられて溶接により一体化され
る。2. Description of the Related Art For example, an exhaust manifold used in a multi-cylinder engine for an automobile is a system in which a plurality of exhaust single pipes extending from a plurality of exhaust ports are integrally assembled. An exhaust gas purification device is connected. In order to smoothly connect a plurality of single exhaust pipes to an exhaust pipe or an exhaust gas purifying device having a circular cross section, for example, in an exhaust manifold for a four-cylinder engine, the downstream end of each single exhaust pipe has a central angle of 90 °. It is processed into a fan-shaped cross section, and the four exhaust single pipes are bundled into a circular cross section at their downstream ends and integrated by welding.
【０００３】[0003]
【発明が解決しようとする課題】ところで、複数の排気
単管の下流端を円形断面になるように束ねて溶接により
一体化した部分は、エンジンの運転時に排出される排気
ガスの熱で各々の排気単管に熱歪みが発生し、特に扇状
断面に加工された排気単管の要に相当する部分がヒート
スポットになってクラックや座屈が発生し易いという問
題があった。By the way, the portions where the downstream ends of a plurality of exhaust single pipes are bundled into a circular cross section and integrated by welding are separated by the heat of the exhaust gas discharged during engine operation. There is a problem that thermal distortion occurs in the exhaust single pipe, and in particular, a portion corresponding to the essential point of the exhaust single pipe processed into a fan-shaped cross section becomes a heat spot, and cracks and buckling are likely to occur.
【０００４】本発明は前述の事情に鑑みてなされたもの
で、エキゾーストマニホールドの複数の排気単管を一体
に集合させる溶接部にクラックや座屈が発生するのを防
止することを目的とする。The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent cracks and buckling from occurring in a weld portion where a plurality of exhaust single pipes of an exhaust manifold are integrated together.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、請求項１に記載された発明によれば、多気筒エンジ
ンの複数の排気ポートから延びる複数の排気単管の下流
端を扇状断面に形成し、それら複数の排気単管の下流端
を円形に組み合わせて溶接により一体化したエキゾース
トマニホールドにおいて、各々の排気単管の扇状断面の
要に相当する部分の内面に剛性増加部を設けたことを特
徴とするエキゾーストマニホールドが提案される。In order to achieve the above object, according to the invention described in claim 1, the downstream ends of a plurality of exhaust single pipes extending from a plurality of exhaust ports of a multi-cylinder engine are fan-shaped in cross section. In the exhaust manifold in which the downstream ends of the plurality of exhaust single pipes are combined in a circular shape and integrated by welding, a rigidity increasing portion is provided on the inner surface of the portion corresponding to the essential part of the fan-shaped cross section of each exhaust single pipe. An exhaust manifold characterized by the above is proposed.
【０００６】上記構成によれば、エキゾーストマニホー
ルドの複数の排気単管の扇状断面に形成した下流端を円
形に組み合わせて溶接により一体化したものにおいて、
各々の排気単管の扇状断面の要に相当する部分の内面に
剛性増加部を設けたことにより、排気ガスの熱による熱
膨張で排気単管にクラックや座屈が生じるのを防止する
ことができ、エキゾーストマニホールドの耐久性および
信頼性の向上に寄与することができる。According to the above construction, in the exhaust manifold of the exhaust single pipe, the downstream ends formed in the fan-shaped cross section are combined in a circular shape and integrated by welding,
By providing the rigidity increasing part on the inner surface of the part corresponding to the essential of the fan-shaped cross section of each exhaust single pipe, it is possible to prevent cracks and buckling from occurring in the exhaust single pipe due to thermal expansion due to the heat of the exhaust gas. It is possible to contribute to the improvement of the durability and reliability of the exhaust manifold.
【０００７】また請求項２に記載された発明によれば、
請求項１の構成に加えて、排気単管の扇状断面の要に相
当する部分を溶接ビードで肉盛りして前記剛性増加部と
したことを特徴とするエキゾーストマニホールドが提案
される。Further, according to the invention described in claim 2,
In addition to the structure of claim 1, there is proposed an exhaust manifold in which a portion corresponding to the essential part of the fan-shaped cross section of the exhaust single pipe is padded with a weld bead to form the rigidity increasing portion.
【０００８】上記構成によれば、元々エキゾーストマニ
ホールドは複数の排気単管を溶接して組み立てられるの
で、その溶接時に溶接ビードによる肉盛りの量を調節す
るだけで剛性増加部の剛性を容易に設定することがで
き、エキゾーストマニホールドの耐久性および信頼性の
向上に寄与することができる。According to the above structure, since the exhaust manifold is originally assembled by welding a plurality of exhaust single pipes, the rigidity of the increased rigidity portion can be easily set only by adjusting the amount of buildup by the welding beads at the time of welding. It is possible to contribute to the improvement of durability and reliability of the exhaust manifold.
【０００９】また請求項３に記載された発明によれば、
請求項１の構成に加えて、排気単管の扇状断面の要に相
当する部分に厚肉部を形成して前記剛性増加部としたこ
とを特徴とするエキゾーストマニホールドが提案され
る。According to the invention described in claim 3,
In addition to the configuration of claim 1, there is proposed an exhaust manifold characterized in that a thick portion is formed in a portion corresponding to the essential part of a fan-shaped cross section of an exhaust single pipe to form the rigidity increasing portion.
【００１０】上記構成によれば、排気単管の扇状断面の
要に相当する部分に厚肉部を形成して剛性増加部とした
ので、排気単管の製造時に剛性増加部を形成することで
加工時間および加工コストを削減することができる。According to the above construction, since the thick portion is formed in the portion corresponding to the essential part of the fan-shaped cross section of the exhaust single pipe to form the rigidity increasing portion, the rigidity increasing portion is formed at the time of manufacturing the exhaust single pipe. Processing time and processing cost can be reduced.
【００１１】また請求項４に記載された発明によれば、
請求項１〜請求項３の何れか１項の構成に加えて、前記
剛性増加部の肉厚は排気単管の上流側から下流側に向け
て次第に増加することを特徴とするエキゾーストマニホ
ールドが提案される。According to the invention described in claim 4,
In addition to the structure according to any one of claims 1 to 3, an exhaust manifold is proposed in which the wall thickness of the rigidity increasing portion gradually increases from the upstream side to the downstream side of the single exhaust pipe. To be done.
【００１２】上記構成によれば、剛性増加部の肉厚が排
気単管の上流側から下流側に向けて次第に増加するの
で、クラックが始まり易い排気単管の下流端の肉厚を最
大にして補強効果を一層高めることができるだけでな
く、肉厚の急変による応力集中を回避して耐久性を一層
高めることができる。According to the above construction, the wall thickness of the rigidity increasing portion gradually increases from the upstream side to the downstream side of the exhaust single pipe, so that the wall thickness of the downstream end of the exhaust single pipe where cracks easily start is maximized. Not only can the reinforcing effect be further enhanced, but also stress concentration due to a sudden change in wall thickness can be avoided and durability can be further enhanced.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に示した本発明の実施例に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.
【００１４】図１〜図７は本発明の第１実施例を示すも
ので、図１はエキゾーストマニホールドの斜視図、図２
はエキゾーストマニホールドの分解斜視図、図３は溶接
前の排気単管の集合部の斜視図、図４は排気単管の斜視
図、図５は溶接後の排気単管の集合部の斜視図、図６は
図５の６−６線断面図、図７は図６の７部拡大図であ
る。1 to 7 show a first embodiment of the present invention. FIG. 1 is a perspective view of an exhaust manifold, and FIG.
Is an exploded perspective view of the exhaust manifold, FIG. 3 is a perspective view of an exhaust single pipe collecting portion before welding, FIG. 4 is a perspective view of an exhaust single pipe, FIG. 5 is a perspective view of an exhaust single pipe collecting portion after welding, 6 is a sectional view taken along line 6-6 of FIG. 5, and FIG. 7 is an enlarged view of part 7 of FIG.
【００１５】図１および図２に示すように、直列４気筒
エンジンのエキゾーストマニホールドＥＭは、エンジン
のシリンダヘッドに結合される板状の取付フランジ１１
と、取付フランジ１１に上流端を溶接された４本の排気
単管１２〜１５と、４本の排気単管１２〜１５の下流端
１２ａ〜１５ａが集合する部分に挟まれる２枚の仕切り
板１６，１７と、４本の排気単管１２〜１５の下流端１
２ａ〜１５ａに接続される排気集合管１８と、排気集合
管１８を排気管あるいは排気ガス浄化装置に接続する取
付フランジ１９とを備える。As shown in FIGS. 1 and 2, an exhaust manifold EM of an in-line four-cylinder engine has a plate-shaped mounting flange 11 which is connected to a cylinder head of the engine.
And four partition plates sandwiched between the four exhaust single pipes 12 to 15 having their upstream ends welded to the mounting flange 11 and the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15 gathering together. 16, 17 and the downstream end 1 of the four exhaust single pipes 12-15
An exhaust collecting pipe 18 connected to 2a to 15a and a mounting flange 19 for connecting the exhaust collecting pipe 18 to an exhaust pipe or an exhaust gas purifying device are provided.
【００１６】４本の排気単管１２〜１５は相互に異なる
長さおよび形状を有しているが、それらの下流端１２ａ
〜１５ａは９０°の中心角を有する同一の扇状断面に形
成されており、それらの下流端１２ａ〜１５ａは扇状断
面の要ｐに相当する部分を互いに対向させて円形断面と
なるように組み合わされる。このとき、各々に形成した
切欠１６ａ，１７ａにより十字状に組み合わされた２枚
の仕切り板１６，１７が、４本の排気単管１２〜１５の
下流端１２ａ〜１５ａに挟まれるように固定される。The four exhaust single pipes 12 to 15 have different lengths and shapes from each other, but their downstream ends 12a.
.About.15a are formed in the same fan-shaped cross section having a central angle of 90.degree., And the downstream ends 12a to 15a thereof are combined so as to have a circular cross section with parts corresponding to the essential point p of the fan-shaped cross section facing each other. . At this time, the two partition plates 16 and 17 combined in a cross shape by the notches 16a and 17a formed in each are fixed so as to be sandwiched between the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15. It
【００１７】♯１シリンダおよび♯２シリンダから延び
る２本の排気単管１２，１３と、♯３シリンダおよび♯
４シリンダから延びる２本の排気単管１４，１５との間
を仕切る第１仕切り板１６は短く形成され、その排気ガ
スの流れ方向下流側の端縁１６ｂは排気単管１２〜１５
の下流端１２ａ〜１５ａの端縁と面一に配置される。一
方、♯１シリンダおよび♯４シリンダから延びる２本の
排気単管１２，１５と、♯２シリンダおよび♯３シリン
ダから延びる２本の排気単管１３，１４との間を仕切る
第２仕切り板１７は長く形成され、その排気ガスの流れ
方向下流側の隔壁部１７ｂは第２仕切り板１７排気単管
１２〜１５の下流端１２ａ〜１５ａの端縁から突出す
る。この第２仕切り板１７の隔壁部１７ｂによって爆発
順序が近いシリンダから出た排気ガスの干渉を回避する
ことができる。Two exhaust single pipes 12 and 13 extending from the # 1 cylinder and # 2 cylinder, and the # 3 cylinder and #
The first partition plate 16 for partitioning between the two single exhaust pipes 14 and 15 extending from the four cylinders is formed short, and the end edge 16b on the downstream side in the exhaust gas flow direction is the single exhaust pipes 12 to 15.
Are arranged flush with the edges of the downstream ends 12a to 15a. On the other hand, the second partition plate 17 for partitioning between the two exhaust single pipes 12 and 15 extending from the # 1 cylinder and the # 4 cylinder and the two exhaust single pipes 13 and 14 extending from the # 2 cylinder and the # 3 cylinder. The partition wall 17b on the downstream side in the exhaust gas flow direction projects from the end edges of the downstream ends 12a to 15a of the second partition plate 17 exhaust single pipes 12 to 15a. By the partition wall portion 17b of the second partition plate 17, it is possible to avoid the interference of the exhaust gas emitted from the cylinder whose explosion order is near.
【００１８】第２仕切り板１７の隔壁部１７ｂの両側縁
に一対のエッジ１７ｃ，１７ｃが形成されており、これ
らのエッジ１７ｃ，１７ｃは４本の排気単管１２〜１５
の下流端１２ａ〜１５ａに接続される排気集合管１８に
形成した一対のスリット１８ａ，１８ａに嵌合する。そ
して排気集合管１８は、４本の排気単管１２〜１５の下
流端１２ａ〜１５ａの外周に嵌合する上流側開口部１８
ｂにおいて溶接により固定されるとともに、スリット１
８ａ，１８ａにおいて第２仕切り板１７のエッジ１７
ｃ，１７ｃに溶接により固定される。このとき、４本の
排気単管１２〜１５の下流端１２ａ〜１５ａの外周に嵌
合して溶接される排気集合管１８は、その上流側開口部
１８ｂが第１仕切り板１６および第２仕切り板１７の両
端に突設した突起１６ｃ，１６ｃ；１７ｄ，１７ｄに当
接して位置決めされる。排気集合管１８の外周に嵌合す
る取付ブラケット１９は、その上流側開口部１９ａが前
記突起１６ｃ，１６ｃ；１７ｄ，１７ｄに当接して位置
決めされた状態で、排気集合管１８に溶接により固定さ
れる。A pair of edges 17c, 17c are formed on both side edges of the partition wall portion 17b of the second partition plate 17, and these edges 17c, 17c are four exhaust single pipes 12-15.
Are fitted into a pair of slits 18a, 18a formed in the exhaust collecting pipe 18 connected to the downstream ends 12a to 15a of the. The exhaust collecting pipe 18 is fitted with the upstream opening 18 that fits on the outer circumference of the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15.
It is fixed by welding at b and the slit 1
Edges 17 of the second partition plate 17 at 8a and 18a
It is fixed to c and 17c by welding. At this time, in the exhaust collecting pipe 18 that is fitted and welded to the outer circumferences of the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15, the upstream opening 18b of the exhaust collecting pipe 18 has the first partition plate 16 and the second partition plate. The protrusions 16c, 16c; 17d, 17d provided at both ends of the plate 17 are brought into contact with each other and positioned. The mounting bracket 19 fitted to the outer circumference of the exhaust gas collecting pipe 18 is fixed to the exhaust gas collecting pipe 18 by welding in a state where the upstream opening 19a thereof is positioned in contact with the protrusions 16c, 16c; 17d, 17d. It
【００１９】次に、エキゾーストマニホールドＥＭの組
立手順を説明する。Next, a procedure for assembling the exhaust manifold EM will be described.
【００２０】先ず、図４に示すように、各々の排気単管
１２〜１５の扇状断面に形成された下流端１２ａ〜１５
ａの要ｐに相当する部分の内面に、溶接ビード２０で肉
盛りすることにより剛性増加部を形成する。続いて、４
本の排気単管１２〜１５の上流端を取付ブラケット１１
に溶接した後、図３に示すように、円形に集合した下流
端１２ａ〜１５ａの間隙に十字状に組み合わせた第１仕
切り板１６および第２仕切り板１７を嵌合させる。続い
て、図５および図６に示すように、円形に束ねた４本の
排気単管１２〜１５の下流端１２ａ〜１５ａおよび第
１、第２仕切り板１６，１７を一体に溶接２１する。First, as shown in FIG. 4, the downstream ends 12a to 15 formed in the fan-shaped cross section of each of the exhaust single tubes 12 to 15 are formed.
A welded bead 20 is built up on the inner surface of a portion corresponding to the point p of a to form a rigidity increasing portion. Then 4
The upstream ends of the single exhaust pipes 12 to 15 are attached to the mounting bracket 11
After welding, as shown in FIG. 3, the first partition plate 16 and the second partition plate 17 combined in a cross shape are fitted in the gaps of the downstream ends 12a to 15a gathered in a circle. Subsequently, as shown in FIGS. 5 and 6, the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15 bundled in a circle and the first and second partition plates 16 and 17 are integrally welded 21.
【００２１】このように、円形に束ねた４本の排気単管
１２〜１５の下流端１２ａ〜１５ａと第１、第２仕切り
板１６，１７とを溶接２１した部分、特に排気単管１２
〜１５の下流端１２ａ〜１５ａの要ｐに相当する部分に
エンジンの排気ガスの熱による熱応力が作用しても、剛
性増加部としての溶接ビード２０の補強作用により、４
本の排気単管１２〜１５の下流端１２ａ〜１５ａにクラ
ックや座屈が発生するのを防止し、エキゾーストマニホ
ールドＥＭの耐久性および信頼性の向上に寄与すること
ができる（図７（Ａ）参照）。しかも、溶接ビード２０
による肉盛りの量を調節することで、剛性の高さを任意
に設定できるため、信頼性および耐久性が一層向上す
る。As described above, the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15 which are bundled in a circular shape and the first and second partition plates 16 and 17 are welded 21, especially the exhaust single pipe 12.
Even if the thermal stress due to the heat of the exhaust gas of the engine acts on the portion corresponding to the point p of the downstream ends 12a to 15a of -15, the reinforcing action of the weld bead 20 as the rigidity increasing portion causes 4
It is possible to prevent cracks and buckling from occurring at the downstream ends 12a to 15a of the exhaust single pipes 12 to 15 of the book, and contribute to improvement in durability and reliability of the exhaust manifold EM (FIG. 7 (A)). reference). Moreover, the welding bead 20
The height of rigidity can be set arbitrarily by adjusting the amount of padding due to, so that reliability and durability are further improved.
【００２２】それに対して、図７（Ｂ）に示すように、
排気単管１２〜１５の下流端１２ａ〜１５ａに溶接ビー
ド２０による補強を施していない従来のものでは、排気
ガスの熱による排気単管１２〜１５の熱膨張で、その下
流端１２ａ〜１５ａの溶接２１部の近傍にクラックｃが
発生したり、座屈ｂが発生したりする問題がある。On the other hand, as shown in FIG.
In the conventional one in which the downstream ends 12a to 15a of the exhaust single pipes 12 to 15 are not reinforced by the weld beads 20, thermal expansion of the exhaust single pipes 12 to 15 due to the heat of the exhaust gas causes the downstream ends 12a to 15a of the exhaust single pipes 12 to 15a to expand. There are problems that a crack c is generated in the vicinity of the welded portion 21 and a buckling b is generated.
【００２３】そして最後に、円形に束ねた４本の排気単
管１２〜１５の下流端１２ａ〜１５ａに排気集合管１８
および取付フランジ１９を溶接してエキゾーストマニホ
ールドＥＭを完成する。Finally, the exhaust collecting pipe 18 is provided at the downstream ends 12a to 15a of the four exhaust single pipes 12 to 15 which are bundled in a circle.
And the mounting flange 19 is welded to complete the exhaust manifold EM.
【００２４】次に、図８に基づいて本発明の他の実施例
を説明する。Next, another embodiment of the present invention will be described with reference to FIG.
【００２５】上述した第１実施例では、排気単管１２〜
１５の下流端１２ａ〜１５ａの要ｐに相当する部分に溶
接ビード２０を設けて剛性を増加させているが、図８
（Ａ）に示す第２実施例では、要ｐに相当する部分に肉
厚を増加させた厚肉部２２を設けて剛性を増加させてい
る。この第２実施例によれば、排気単管１２〜１５の製
造時に同時に厚肉部２２を形成することができるので、
加工工数を一層削減してコストダウンに寄与することが
できる。In the above-mentioned first embodiment, the exhaust single pipe 12-
Although a weld bead 20 is provided in a portion of the downstream ends 12a to 15a of 15 corresponding to the point p, the rigidity is increased.
In the second embodiment shown in (A), the rigidity is increased by providing the thick portion 22 having an increased thickness in the portion corresponding to the required p. According to the second embodiment, the thick portion 22 can be formed at the same time when the exhaust single pipes 12 to 15 are manufactured.
The number of processing steps can be further reduced to contribute to cost reduction.
【００２６】図８（Ｂ）および図８（Ｃ）に示す第３実
施例および第４実施例は、それぞれ前記第１実施例およ
び第２実施例の変形であって、第１実施例の溶接ビード
２０および第２実施例の厚肉部２２が長手方向に一定の
肉厚を有しているのに対し、第３実施例の溶接ビード２
０および第４実施例の厚肉部２２は排気単管１２〜１５
の上流側から下流側に向けて肉厚が次第に増加してい
る。これにより、強度的に最も辛い排気単管１２〜１５
の下流端１２ａ〜１５ａの端面の剛性を効果的に高める
とともに、溶接ビード２０および厚肉部２２が設けられ
ていない部分との間で剛性が急激に変化するのを防止し
て、エキゾーストマニホールドＥＭの耐久性および信頼
性を一層向上させることができる。The third embodiment and the fourth embodiment shown in FIGS. 8B and 8C are modifications of the first embodiment and the second embodiment, respectively, and are the welding of the first embodiment. While the bead 20 and the thick portion 22 of the second embodiment have a constant thickness in the longitudinal direction, the weld bead 2 of the third embodiment is used.
0 and the thick portion 22 of the fourth embodiment are the single exhaust pipes 12 to 15
The wall thickness gradually increases from the upstream side to the downstream side. With this, the exhaust single pipe 12 to 15 which is the most difficult in terms of strength
The rigidity of the end faces of the downstream ends 12a to 15a of the exhaust gas is effectively increased, and the rigidity is prevented from abruptly changing between the weld bead 20 and the portion where the thick portion 22 is not provided, and the exhaust manifold EM The durability and reliability of can be further improved.
【００２７】以上、本発明の実施例を詳述したが、本発
明はその要旨を逸脱しない範囲で種々の設計変更を行う
ことが可能である。Although the embodiments of the present invention have been described in detail above, the present invention can be modified in various ways without departing from the scope of the invention.
【００２８】例えば、第１実施例では各々の排気単管１
２〜１５の下流端１２ａ〜１５ａに溶接ビード２０を形
成した後に、排気単管１２〜１５の下流端１２ａ〜１５
ａおよび第１、第２仕切り板１６，１７を溶接２１して
いるが、排気単管１２〜１５の下流端１２ａ〜１５ａお
よびと第１、第２仕切り板１６，１７を溶接２１した後
に下流端１２ａ〜１５ａに溶接ビード２０を形成しても
良い。For example, in the first embodiment, each exhaust single pipe 1
After forming the weld bead 20 on the downstream ends 12a to 15a of the exhaust pipes 2 to 15, the downstream ends 12a to 15 of the exhaust single pipes 12 to 15 are formed.
a and the first and second partition plates 16 and 17 are welded 21, but the downstream ends 12a to 15a of the exhaust single pipes 12 to 15 and the first and second partition plates 16 and 17 are welded to each other, and then downstream. The weld beads 20 may be formed on the ends 12a to 15a.
【００２９】また実施例のエキゾーストマニホールドＥ
Ｍは、排気単管１２〜１５の集合部に排気ガスの分離効
果を持たない第１仕切り板１６と排気ガスの分離効果を
持つ第２仕切り板１７とを設けているが、第１、第２仕
切り板１６，１７を共に排気ガスの分離効果を持たない
ものにしても良く、また第１、第２仕切り板１６，１７
を廃止しても良い。Further, the exhaust manifold E of the embodiment
M is provided with a first partition plate 16 having no exhaust gas separation effect and a second partition plate 17 having an exhaust gas separation effect at the collecting portion of the exhaust single pipes 12 to 15. The second partition plates 16 and 17 may not both have the effect of separating exhaust gas, and the first and second partition plates 16 and 17 may be used.
May be abolished.
【００３０】[0030]
【発明の効果】以上のように請求項１に記載された発明
によれば、エキゾーストマニホールドの複数の排気単管
の扇状断面に形成した下流端を円形に組み合わせて溶接
により一体化したものにおいて、各々の排気単管の扇状
断面の要に相当する部分の内面に剛性増加部を設けたこ
とにより、排気ガスの熱による熱膨張で排気単管にクラ
ックや座屈が生じるのを防止することができ、エキゾー
ストマニホールドの耐久性および信頼性の向上に寄与す
ることができる。As described above, according to the invention described in claim 1, in the exhaust manifold, a plurality of exhaust single pipes are combined in a circular shape by combining downstream ends formed in a fan-shaped cross section, and integrated by welding. By providing the rigidity increasing part on the inner surface of the part corresponding to the essential of the fan-shaped cross section of each exhaust single pipe, it is possible to prevent cracks and buckling from occurring in the exhaust single pipe due to thermal expansion due to the heat of the exhaust gas. It is possible to contribute to the improvement of the durability and reliability of the exhaust manifold.
【００３１】また請求項２に記載された発明によれば、
元々エキゾーストマニホールドは複数の排気単管を溶接
して組み立てられるので、その溶接時に溶接ビードによ
る肉盛りの量を調節するだけで剛性増加部の剛性を容易
に設定することができ、エキゾーストマニホールドの耐
久性および信頼性の向上に寄与することができる。According to the invention described in claim 2,
Originally, the exhaust manifold is assembled by welding multiple exhaust single pipes, so at the time of welding, it is possible to easily set the rigidity of the increased rigidity part by adjusting the amount of buildup by the welding beads, which makes the exhaust manifold durable. It can contribute to the improvement of the reliability and the reliability.
【００３２】また請求項３に記載された発明によれば、
排気単管の扇状断面の要に相当する部分に厚肉部を形成
して剛性増加部としたので、排気単管の製造時に剛性増
加部を形成することで加工時間および加工コストを削減
することができる。According to the invention described in claim 3,
Since a thickened portion was formed in the portion corresponding to the corner of the fan-shaped cross section of the exhaust single pipe to form the rigidity increasing portion, it is possible to reduce the processing time and processing cost by forming the rigidity increasing portion at the time of manufacturing the exhaust single pipe. You can
【００３３】また請求項４に記載された発明によれば、
剛性増加部の肉厚が排気単管の上流側から下流側に向け
て次第に増加するので、クラックが始まり易い排気単管
の下流端の肉厚を最大にして補強効果を一層高めること
ができるだけでなく、肉厚の急変による応力集中を回避
して耐久性を一層高めることができる。According to the invention described in claim 4,
Since the wall thickness of the rigidity increasing part gradually increases from the upstream side to the downstream side of the exhaust single pipe, it is not only possible to maximize the wall thickness of the downstream end of the exhaust single pipe where cracks are likely to start and further enhance the reinforcing effect. In addition, stress concentration due to a sudden change in wall thickness can be avoided and durability can be further improved.
【図１】エキゾーストマニホールドの斜視図FIG. 1 is a perspective view of an exhaust manifold.
【図２】エキゾーストマニホールドの分解斜視図FIG. 2 is an exploded perspective view of an exhaust manifold
【図３】溶接前の排気単管の集合部の斜視図FIG. 3 is a perspective view of a collecting portion of the exhaust single pipe before welding.
【図４】排気単管の斜視図FIG. 4 is a perspective view of an exhaust single pipe.
【図５】溶接後の排気単管の集合部の斜視図FIG. 5 is a perspective view of a collecting portion of the exhaust single pipe after welding.
【図６】図５の６−６線断面図6 is a sectional view taken along line 6-6 of FIG.
【図７】図６の７部拡大図FIG. 7 is an enlarged view of part 7 of FIG.
【図８】本発明の第２〜第４実施例に係る排気単管の斜
視図FIG. 8 is a perspective view of a single exhaust pipe according to second to fourth embodiments of the present invention.
１２〜１５ 排気単管 １２ａ〜１５ａ 下流端 ２０ 溶接ビード ２１ 溶接 ２２ 厚肉部 ｐ 要 12 to 15 single exhaust pipe 12a to 15a Downstream end 20 weld beads 21 welding 22 Thick part p required
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宗村 岳 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 藤森 浩一 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 中田 真 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 Ｆターム(参考） 3G004 AA01 BA00 BA05 DA02 FA04 GA02 GA06 3H111 AA01 BA01 CA29 CC19 CC22 DB11 DB20 EA14 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Mt. Somura 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory (72) Inventor Koichi Fujimori 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory (72) Inventor Makoto Nakata 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory F-term (reference) 3G004 AA01 BA00 BA05 DA02 FA04 GA02 GA06 3H111 AA01 BA01 CA29 CC19 CC22 DB11 DB20 EA14
Claims (4)
延びる複数の排気単管（１２〜１５）の下流端（１２ａ
〜１５ａ）を扇状断面に形成し、それら複数の排気単管
（１２〜１５）の下流端（１２ａ〜１５ａ）を円形に組
み合わせて溶接（２１）により一体化したエキゾースト
マニホールドにおいて、 各々の排気単管（１２〜１５）の扇状断面の要（ｐ）に
相当する部分の内面に剛性増加部を設けたことを特徴と
するエキゾーストマニホールド。1. A downstream end (12a) of a plurality of exhaust single pipes (12-15) extending from a plurality of exhaust ports of a multi-cylinder engine.
15a) are formed in a fan-shaped cross section, and the downstream ends (12a-15a) of the plurality of exhaust single pipes (12-15) are combined in a circular shape and integrated by welding (21). An exhaust manifold, characterized in that a rigidity increasing portion is provided on an inner surface of a portion of the pipes (12 to 15) corresponding to the point (p) of the fan-shaped cross section.
（ｐ）に相当する部分を溶接ビード（２０）で肉盛りし
て前記剛性増加部としたことを特徴とする、請求項１に
記載のエキゾーストマニホールド。2. The rigidity increasing portion is characterized in that a portion corresponding to the point (p) of the fan-shaped cross section of the exhaust single pipe (12 to 15) is built up with a weld bead (20) to form the rigidity increasing portion. The exhaust manifold according to 1.
（ｐ）に相当する部分に厚肉部（２２）を形成して前記
剛性増加部としたことを特徴とする、請求項１に記載の
エキゾーストマニホールド。3. The rigidity increasing portion is formed by forming a thick portion (22) at a portion corresponding to a point (p) of a fan-shaped cross section of the exhaust single pipe (12 to 15). The exhaust manifold according to 1.
〜１５）の上流側から下流側に向けて次第に増加するこ
とを特徴とする、請求項１〜請求項３の何れか１項に記
載のエキゾーストマニホールド。4. The exhaust single pipe (12) has a wall thickness of the rigidity increasing portion.
To 15), the exhaust manifold gradually increases from the upstream side to the downstream side.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001280127A JP3509796B2 (en) | 2001-09-14 | 2001-09-14 | exhaust manifold |
| TW91120493A TW542873B (en) | 2001-09-14 | 2002-09-09 | Exhaust manifold |
| MYPI20023434 MY127569A (en) | 2001-09-14 | 2002-09-14 | Exhaust manifold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001280127A JP3509796B2 (en) | 2001-09-14 | 2001-09-14 | exhaust manifold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003083062A true JP2003083062A (en) | 2003-03-19 |
| JP3509796B2 JP3509796B2 (en) | 2004-03-22 |
Family
ID=19104180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001280127A Expired - Fee Related JP3509796B2 (en) | 2001-09-14 | 2001-09-14 | exhaust manifold |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3509796B2 (en) |
| MY (1) | MY127569A (en) |
| TW (1) | TW542873B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1413719A3 (en) * | 2002-10-23 | 2004-09-22 | Zeuna-Stärker Gmbh & Co Kg | Exhaust manifold for a combustion engine driven vehicle and an exhaust gas system assembly comprising such an exhaust manifold |
| US6837044B2 (en) | 2002-03-13 | 2005-01-04 | Yumex Corporation | Structure of an exhaust manifold branch collecting portion |
| JP2007009836A (en) * | 2005-07-01 | 2007-01-18 | Toyota Motor Corp | Exhaust manifold |
| WO2008010390A1 (en) | 2006-07-19 | 2008-01-24 | Calsonic Kansei Corporation | Collecting portion structure of exhaust manifold |
| WO2008056591A1 (en) * | 2006-11-06 | 2008-05-15 | Calsonic Kansei Corporation | Collecting portion structure for exhaust manifold |
| US8127539B2 (en) | 2006-07-10 | 2012-03-06 | Calsonic Kansei Corporation | Exhaust manifold |
| CN104481661A (en) * | 2014-11-25 | 2015-04-01 | 镇江利奥排气技术有限公司 | Exhaust manifold with good exhaust performance |
| CN104564294A (en) * | 2014-11-03 | 2015-04-29 | 镇江利奥排气技术有限公司 | Novel sector-shaped opening manifold branch of exhausting pipe |
| CN104690108A (en) * | 2015-03-30 | 2015-06-10 | 西峡县内燃机进排气管有限责任公司 | Manufacturing method for tubular stainless steel manifold |
| US9347361B2 (en) | 2012-10-15 | 2016-05-24 | Toyota Jidosha Kabushiki Kaisha | Exhaust manifold mounting structure for internal combustion engine |
-
2001
- 2001-09-14 JP JP2001280127A patent/JP3509796B2/en not_active Expired - Fee Related
-
2002
- 2002-09-09 TW TW91120493A patent/TW542873B/en not_active IP Right Cessation
- 2002-09-14 MY MYPI20023434 patent/MY127569A/en unknown
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6837044B2 (en) | 2002-03-13 | 2005-01-04 | Yumex Corporation | Structure of an exhaust manifold branch collecting portion |
| EP1413719A3 (en) * | 2002-10-23 | 2004-09-22 | Zeuna-Stärker Gmbh & Co Kg | Exhaust manifold for a combustion engine driven vehicle and an exhaust gas system assembly comprising such an exhaust manifold |
| JP4539465B2 (en) * | 2005-07-01 | 2010-09-08 | トヨタ自動車株式会社 | exhaust manifold |
| JP2007009836A (en) * | 2005-07-01 | 2007-01-18 | Toyota Motor Corp | Exhaust manifold |
| US8127539B2 (en) | 2006-07-10 | 2012-03-06 | Calsonic Kansei Corporation | Exhaust manifold |
| EP2065579A1 (en) * | 2006-07-19 | 2009-06-03 | Calsonic Kansei Corporation | Collecting portion structure of exhaust manifold |
| JP2008025387A (en) * | 2006-07-19 | 2008-02-07 | Calsonic Kansei Corp | Aggregation structure of exhaust manifold |
| EP2065579A4 (en) * | 2006-07-19 | 2011-04-27 | Calsonic Kansei Corp | Collecting portion structure of exhaust manifold |
| CN101490377B (en) * | 2006-07-19 | 2011-06-22 | 康奈可关精株式会社 | Collecting portion structure of exhaust manifold |
| US8061130B2 (en) | 2006-07-19 | 2011-11-22 | Calsonic Kansei Corporation | Collecting part structure of exhaust manifold |
| WO2008010390A1 (en) | 2006-07-19 | 2008-01-24 | Calsonic Kansei Corporation | Collecting portion structure of exhaust manifold |
| WO2008056591A1 (en) * | 2006-11-06 | 2008-05-15 | Calsonic Kansei Corporation | Collecting portion structure for exhaust manifold |
| JP2008115797A (en) * | 2006-11-06 | 2008-05-22 | Calsonic Kansei Corp | Aggrigate part structure of exhaust manifold |
| US9347361B2 (en) | 2012-10-15 | 2016-05-24 | Toyota Jidosha Kabushiki Kaisha | Exhaust manifold mounting structure for internal combustion engine |
| CN104564294A (en) * | 2014-11-03 | 2015-04-29 | 镇江利奥排气技术有限公司 | Novel sector-shaped opening manifold branch of exhausting pipe |
| CN104481661A (en) * | 2014-11-25 | 2015-04-01 | 镇江利奥排气技术有限公司 | Exhaust manifold with good exhaust performance |
| CN104690108A (en) * | 2015-03-30 | 2015-06-10 | 西峡县内燃机进排气管有限责任公司 | Manufacturing method for tubular stainless steel manifold |
Also Published As
| Publication number | Publication date |
|---|---|
| MY127569A (en) | 2006-12-29 |
| JP3509796B2 (en) | 2004-03-22 |
| TW542873B (en) | 2003-07-21 |
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