JP4397779B2 - Exhaust manifold - Google Patents

Exhaust manifold Download PDF

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JP4397779B2
JP4397779B2 JP2004293764A JP2004293764A JP4397779B2 JP 4397779 B2 JP4397779 B2 JP 4397779B2 JP 2004293764 A JP2004293764 A JP 2004293764A JP 2004293764 A JP2004293764 A JP 2004293764A JP 4397779 B2 JP4397779 B2 JP 4397779B2
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branch pipes
downstream
upstream
exhaust manifold
container
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JP2006105044A (en
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進 小川
直人 児玉
信行 吉田
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Honda Motor Co Ltd
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Description

本発明は、排気マニホールドに関し、特に内燃機関の各気筒の排気ポートに接続される複数の枝管と、それらの複数の枝管が接続される集合部容器とを備えるものに関する。   The present invention relates to an exhaust manifold, and more particularly, to an exhaust manifold including a plurality of branch pipes connected to exhaust ports of respective cylinders of an internal combustion engine and a collecting portion container to which the plurality of branch pipes are connected.

特許文献１には、図６に示すように、２本のパイプ１０１を溶接部１０３にて溶接して上流側排気管１０２を構成し、上流側排気管１０２と下流側排気管１０４とを嵌合させ、溶接部１０５にて溶接することにより構成される排気集合部の構造が開示されている。   In Patent Document 1, as shown in FIG. 6, two pipes 101 are welded at a welded portion 103 to form an upstream exhaust pipe 102, and the upstream exhaust pipe 102 and the downstream exhaust pipe 104 are fitted. In addition, a structure of an exhaust collecting portion configured by welding at a welding portion 105 is disclosed.

特許第３４５７７８２号公報Japanese Patent No. 3457778

特許文献１に示された排気集合部の構造においては、上流側排気管１０２と下流側排気管１０４との溶接部１０５と、上流側排気管の溶接部１０３とが重なるため、接合強度が低下する場合があった。   In the structure of the exhaust collecting portion disclosed in Patent Document 1, the welded portion 105 between the upstream exhaust pipe 102 and the downstream exhaust pipe 104 overlaps with the welded portion 103 of the upstream exhaust pipe. There was a case.

本発明はこの点に着目してなされたものであり、溶接部の接合強度をより高めて耐久性を向上させた排気マニホールドを提供することを目的とする。   This invention is made paying attention to this point, and it aims at providing the exhaust manifold which raised the joint strength of the welding part and improved durability.

上記目的を達成するため請求項１に記載の発明は、上流側が多気筒内燃機関の排気ポートに接続されるパイプ状の複数の枝管（１，２，３）と、前記複数の枝管（１，２，３）の下流側が接続される集合部容器（４）とを備えた排気マニホールドにおいて、前記集合部容器（４）は、それぞれ一体に形成され、排気の流れの上流側に位置する上流側部材（５）と、下流側に位置する下流側部材（６）とからなり、前記上流側部材（５）は、前記複数の枝管（１〜３）の各軸線（１ａ〜３ａ）が前記集合部容器（４）内部の所定位置（Ｐ１）にて略交わる向きに前記枝管（１，２，３）が挿入される複数の接続孔（５ａ，５ｂ，５ｃ）を有し、前記複数の枝管（１，２，３）を構成する各枝管の下流側端部には、前記集合部容器（４）内部で少なくとも他の２つの前記枝管とそれぞれ接触する下流側端部接触部（１ｂ，２ｂ，３ｂ）が設けられており、前記下流側端部接触部（１ｂ，２ｂ，３ｂ）は互いに平面で接触するように構成されていることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of pipe-like branch pipes (1, 2, 3) whose upstream side are connected to an exhaust port of a multi-cylinder internal combustion engine, and the plurality of branch pipes ( 1, 2, 3), and an exhaust manifold provided with a collective vessel (4) to which the downstream side is connected, the collective vessel (4) is formed integrally and positioned upstream of the exhaust flow It consists of an upstream member (5) and a downstream member (6) located on the downstream side, and the upstream member (5) is an axis (1a-3a) of the plurality of branch pipes (1-3). Has a plurality of connection holes (5a, 5b, 5c) into which the branch pipes (1, 2, 3) are inserted in a direction substantially intersecting at a predetermined position (P1) inside the assembly container (4), The downstream end of each branch pipe constituting the plurality of branch pipes (1, 2, 3) has a small amount inside the collecting section container (4). Kutomo downstream end contact portion for contacting respectively the other two of said branch pipes (1b, 2b, 3b) is provided, wherein the downstream end contact portion (1b, 2b, 3b) each other in a plane It is comprised so that it may contact .

請求項２に記載の発明は、請求項１に記載の排気マニホールドにおいて、前記上流側部材（５）と前記下流側部材（６））との接続部（Ｗ２）、及び前記複数の枝管（１，２，３）と前記複数の接続孔（５ａ，５ｂ，５ｃ）との接続部（Ｗ１）は、前記集合部容器（４）外側から溶接されていることを特徴とする。   According to a second aspect of the present invention, in the exhaust manifold according to the first aspect, the connection portion (W2) between the upstream side member (5) and the downstream side member (6)) and the plurality of branch pipes ( 1, 2 and 3) and the connection portions (W1) between the plurality of connection holes (5a, 5b and 5c) are welded from the outside of the assembly container (4).

請求項１に記載の発明によれば、集合部容器が、それぞれ一体に形成された上流側部材と下流側部材とで形成されるので、上流側部材と下流側部材の溶接部と、複数の枝管の溶接部とが重なることが無く、接合強度を向上させることができる。また、複数の枝管を構成する各枝管の下流側端部には、集合部容器内部で少なくとも他の２つの枝管とそれぞれ平面で相互に接触する下流側端部接触部が設けられているので、複数の枝管の境界付近の排気流れを整えることができる。 According to the first aspect of the present invention, since the collecting portion container is formed by the upstream member and the downstream member that are integrally formed, respectively, the welded portion of the upstream member and the downstream member, The welded portion of the branch pipe does not overlap and the joint strength can be improved. The downstream end of each branch pipe constituting the plurality of branch pipes is provided with a downstream end contact portion that is in contact with at least the other two branch pipes in a plane in the assembly container. Therefore, it is possible to arrange the exhaust flow near the boundary between the plurality of branch pipes.

請求項２に記載の発明によれば、上流側部材と下流側部材との接続部、及び複数の枝管と複数の接続孔部との接続部は、いずれも集合部容器の外側から溶接されているので、排気マニホールド内部にスパッタ等の異物が残留することが無く、除去の手間を省くことができる。   According to the second aspect of the present invention, the connection part between the upstream member and the downstream member and the connection part between the plurality of branch pipes and the plurality of connection holes are all welded from the outside of the assembly container. As a result, foreign matter such as spatter does not remain inside the exhaust manifold, and the time and effort for removal can be saved.

以下本発明の実施の形態を図面を参照して説明する。
図１は本発明の一実施形態にかかる排気マニホールドの斜視図、図２は、図１に示す排気マニホールドの要部の縦断面図である。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of an exhaust manifold according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a main part of the exhaust manifold shown in FIG.

図１に示す排気マニホールドは、上流側が多気筒内燃機関の排気ポートに接続されるパイプ状の枝管１，２，及び３と、枝管１〜３の下流側が接続される集合部容器４とを備えている。集合部容器４は、それぞれ一体に形成され、排気の流れの上流側に位置する上流側部材５と、下流側に位置する下流側部材６とからなる。なお、図２に示す断面図では、枝管３は手前側に位置するため、図示されていない。   The exhaust manifold shown in FIG. 1 includes pipe-like branch pipes 1, 2, and 3 whose upstream side is connected to an exhaust port of a multi-cylinder internal combustion engine, and a collective container 4 to which downstream sides of the branch pipes 1 to 3 are connected. It has. The collecting portion container 4 is integrally formed, and includes an upstream member 5 positioned on the upstream side of the exhaust flow and a downstream member 6 positioned on the downstream side. In the cross-sectional view shown in FIG. 2, the branch pipe 3 is not shown because it is located on the near side.

図３は、上流側部材５の斜視図であり、図４は、下流側部材６の斜視図であり、上流側部材５は枝管１〜３が接続（挿入）される接続孔５ａ，５ｂ，及び５ｃを有する。また図５は、上流側部材５の接続孔５ａ〜５ｃに枝管１〜３が挿入された状態を、図２に示す状態で下方（集合部容器４の内部の側）から見た平面図である。以下、これらの図も合わせて参照する。   3 is a perspective view of the upstream member 5, FIG. 4 is a perspective view of the downstream member 6, and the upstream member 5 has connection holes 5a and 5b to which branch pipes 1 to 3 are connected (inserted). , And 5c. 5 is a plan view of the state in which the branch pipes 1 to 3 are inserted into the connection holes 5a to 5c of the upstream member 5 as viewed from below (inside the collecting container 4) in the state shown in FIG. It is. Hereinafter, these drawings are also referred to.

上流側部材５の接続孔５ａ〜５ｃは、枝管１〜３の各軸線１ａ，２ａ，及び３ａ（軸線３ａは図示せず）が、集合部容器４の内部の所定位置Ｐ１にて略交わる向きに、枝管１〜３が接続されるように設けられている。また各枝管１〜３の下流側端部には、集合部容器４の内部で他の２つの枝管とそれぞれ接触する下流側端部接触部１ｂ，２ｂ，及び３ｂが設けられている。図２には、枝管２の接触部２ｂを構成する、枝管３の接触部３ｂと接触する平面が示されている。すなわち、枝管１の接触部１ｂは、枝管２の接触部２ｂと接触する平面、及び枝管３の接触部３ｂと接触する平面からなり、枝管２の接触部２ｂは、枝管１の接触部１ｂと接触する平面、及び枝管３の接触部３ｂと接触する平面からなり、枝管３の接触部３ｂは、枝管２の接触部２ｂと接触する平面、及び枝管１の接触部１ｂと接触する平面からなり、これらの接触平面は、図５に示す状態で図面に垂直の方向に延びている。
図２に示すＷ１〜Ｗ３が溶接部であり、いずれの溶接部Ｗ１〜Ｗ３も集合容器４の外部に位置している。 In the connection holes 5 a to 5 c of the upstream member 5, the axes 1 a, 2 a, and 3 a (the axis 3 a is not shown) of the branch pipes 1 to 3 substantially intersect at a predetermined position P <b> 1 inside the assembly container 4. It is provided so that branch pipes 1-3 may be connected in the direction. Further, downstream end contact portions 1b, 2b, and 3b that are in contact with the other two branch pipes inside the collecting portion container 4 are provided at the downstream end portions of the branch pipes 1 to 3, respectively. FIG. 2 shows a plane that contacts the contact portion 3 b of the branch pipe 3 and that constitutes the contact portion 2 b of the branch pipe 2. That is, the contact portion 1b of the branch pipe 1 includes a plane that contacts the contact portion 2b of the branch pipe 2, and a plane that contacts the contact portion 3b of the branch pipe 3. The contact portion 2b of the branch pipe 2 The contact portion 1b of the branch pipe 3 and the contact portion 3b of the branch pipe 3 are in contact with each other. The contact portion 3b of the branch pipe 3 is in contact with the contact portion 2b of the branch pipe 2 and It consists of a plane which contacts the contact part 1b, and these contact planes are extended in the direction perpendicular | vertical to drawing in the state shown in FIG.
W1 to W3 shown in FIG. 2 are welded portions, and any of the welded portions W1 to W3 are located outside the collecting container 4.

このように本実施形態では、集合部容器４が、それぞれ一体に形成された上流側部材５と下流側部材６とで形成されるので、上流側部材５と下流側部材６の溶接部Ｗ２と、複数の枝管の溶接部Ｗ１とが重なることが無く、接合強度を向上させることができる。また、３つの枝管１〜３の下流側端部には、集合部容器４の内部で他の２つの枝管とそれぞれ接触する下流側端部接触部１ｂ〜３ｂが設けられているので、枝管１〜３の境界付近の排気流れを整えることができる。   Thus, in this embodiment, since the gathering part container 4 is formed by the upstream member 5 and the downstream member 6 that are integrally formed, the welded portion W2 of the upstream member 5 and the downstream member 6 and The welded portions W1 of the plurality of branch pipes do not overlap with each other, and the joint strength can be improved. In addition, since the downstream end portions of the three branch pipes 1 to 3 are provided with downstream end contact portions 1b to 3b that are in contact with the other two branch pipes inside the collecting portion container 4, respectively. The exhaust flow near the boundary between the branch pipes 1 to 3 can be arranged.

また、上流側部材５と下流側部材６との接続部（溶接部Ｗ２）、及び枝管１〜３と接続孔５ａ〜５ｃとの接続部（溶接部Ｗ１）は、いずれも集合部容器４の外側から溶接されているので、排気マニホールド内部にスパッタ等の異物が残留することが無く、除去の手間を省くことができる。   Moreover, the connection part (welding part W2) of the upstream side member 5 and the downstream side member 6, and the connection part (welding part W1) of the branch pipes 1-3 and the connection holes 5a-5c are all gathering part containers 4. Therefore, foreign matter such as spatter does not remain in the exhaust manifold, and the labor for removal can be saved.

本実施形態では、集合部容器４（上流側部材５及び下流側部材６）は、ステンレス材をプレス加工することにより製造したが、ロストワックス（LOST-WAX）製法により製造するようにしてもよい。   In the present embodiment, the collecting section container 4 (upstream member 5 and downstream member 6) is manufactured by pressing a stainless material, but may be manufactured by a lost wax (LOST-WAX) manufacturing method. .

なお本発明は上述した実施形態に限るものではなく、種々の変形が可能である。例えば、枝管の数は３つに限るものではなく、４以上であってもよい。   The present invention is not limited to the embodiment described above, and various modifications can be made. For example, the number of branch pipes is not limited to three and may be four or more.

本発明の一実施形態にかかる排気マニホールドの全体構成を示す斜視図である。It is a perspective view showing the whole exhaust manifold composition concerning one embodiment of the present invention. 図１に示す排気マニホールドの要部の縦断面図である。It is a longitudinal cross-sectional view of the principal part of the exhaust manifold shown in FIG. 図１に示す上流側部材の斜視図である。It is a perspective view of the upstream member shown in FIG. 図１に示す下流側部材の斜視図である。It is a perspective view of the downstream member shown in FIG. 図２に示す状態で下方から、集合部容器の内部を見た平面図である。It is the top view which looked at the inside of a gathering part container from the bottom in the state shown in FIG. 従来の排気マニホールドの一構成例を示す図である。It is a figure which shows one structural example of the conventional exhaust manifold.

符号の説明Explanation of symbols

１，２，３ 枝管
１ａ，２ａ 軸線
１ｂ，２ｂ，３ｂ 下流側端部接触部
４ 集合部容器
５ 上流側部材
５ａ，５ｂ，５ｃ 接続孔
６ 下流側部材 1, 2 and 3 Branch pipes 1a, 2a Axis 1b, 2b, 3b Downstream end contact portion 4 Collecting portion container 5 Upstream member 5a, 5b, 5c Connection hole 6 Downstream member

Claims (2)

上流側が多気筒内燃機関の排気ポートに接続されるパイプ状の複数の枝管と、前記複数の枝管の下流側が接続される集合部容器とを備えた排気マニホールドにおいて、
前記集合部容器は、それぞれ一体に形成され、排気の流れの上流側に位置する上流側部材と、下流側に位置する下流側部材とからなり、
前記上流側部材は、前記複数の枝管の各軸線が前記集合部容器内部の所定位置にて略交わる向きに前記枝管が挿入される複数の接続孔を有し、
前記複数の枝管を構成する各枝管の下流側端部には、前記集合部容器内部で少なくとも他の２つの前記枝管とそれぞれ接触する下流側端部接触部が設けられており、
前記下流側端部接触部は互いに平面で接触するように構成されていることを特徴とする排気マニホールド。 In an exhaust manifold comprising a plurality of pipe-like branch pipes whose upstream side is connected to an exhaust port of a multi-cylinder internal combustion engine, and a collecting vessel that is connected to the downstream side of the plurality of branch pipes,
Each of the assembly containers is formed integrally, and is composed of an upstream member located on the upstream side of the exhaust flow and a downstream member located on the downstream side,
The upstream member has a plurality of connection holes into which the branch pipes are inserted in a direction in which the axes of the plurality of branch pipes substantially intersect at predetermined positions inside the collecting portion container,
The downstream end of each branch pipe constituting the plurality of branch pipes is provided with a downstream end contact portion that comes into contact with at least the other two branch pipes inside the assembly container ,
The exhaust manifold is configured such that the downstream end contact portions are in contact with each other in a plane . 前記上流側部材と前記下流側部材との接続部、及び前記複数の枝管と前記複数の接続孔との接続部は、前記集合部容器外側から溶接されていることを特徴とする請求項１に記載の排気マニホールド。   The connection part between the upstream member and the downstream member and the connection part between the plurality of branch pipes and the plurality of connection holes are welded from the outside of the collecting part container. Exhaust manifold as described in
JP2004293764A 2004-10-06 2004-10-06 Exhaust manifold Expired - Fee Related JP4397779B2 (en)

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0615817B2 (en) * 1985-05-14 1994-03-02 本田技研工業株式会社 Exhaust manifold of a multi-cylinder internal combustion engine
JPH0482314U (en) * 1990-11-28 1992-07-17
JPH0783049A (en) * 1993-09-16 1995-03-28 Toyota Motor Corp Exhaust manifold and exhaust device of engine
JP3457782B2 (en) * 1995-11-20 2003-10-20 株式会社ユタカ技研 Exhaust assembly structure
JP2002276356A (en) * 2001-03-19 2002-09-25 Mazda Motor Corp Exhaust structure for on-vehicle engine
JP2004278401A (en) * 2003-03-14 2004-10-07 Mazda Motor Corp Engine exhaust-emission cleaning device

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