JPH09296725A - Split exhaust manifold - Google Patents
Split exhaust manifoldInfo
- Publication number
- JPH09296725A JPH09296725A JP9013339A JP1333997A JPH09296725A JP H09296725 A JPH09296725 A JP H09296725A JP 9013339 A JP9013339 A JP 9013339A JP 1333997 A JP1333997 A JP 1333997A JP H09296725 A JPH09296725 A JP H09296725A
- Authority
- JP
- Japan
- Prior art keywords
- manifold
- annular
- exhaust manifold
- split
- members
- 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.)
- Pending
Links
Landscapes
- Joints Allowing Movement (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は複数のマニホルド部
材を連結した構造を有する自動車エンジン用の分割型排
気マニホルドに関し、特に入れ子式に連結したマニホル
ド部材の環状突出端部どうしが酸化腐食により固着する
のを防止して、排気マニホルドの亀裂や排気ガスの洩れ
等を防止した分割型排気マニホルドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split exhaust manifold for an automobile engine having a structure in which a plurality of manifold members are connected to each other, and in particular, annular protruding ends of the manifold members connected in a nested manner are fixed by oxidative corrosion. The present invention relates to a split type exhaust manifold that prevents cracks in the exhaust manifold and leakage of exhaust gas by preventing the above.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】多気筒
エンジンでの長尺な排気マニホルドでは、エンジンの運
転・停止の繰り返しにより熱変形や熱亀裂が起こるのを
防止するとともに排気ガスの漏れを防止するために、２
分割又は３分割した構造にすることがある。このような
分割型排気マニホルドでは、加熱・冷却に伴う熱膨張・
熱収縮に対応できるように分割部が伸縮自在にされてい
る。2. Description of the Related Art In a long exhaust manifold for a multi-cylinder engine, thermal deformation and thermal cracks are prevented from occurring due to repeated running and stopping of the engine, and exhaust gas leakage is prevented. 2 to prevent
The structure may be divided or divided into three. In such a split exhaust manifold, thermal expansion and
The split part is expandable so that it can cope with heat shrinkage.
【０００３】例えば実開昭55-163425 号は、図５に示す
ように、一方のマニホルド部材51の環状突出端部52の内
面53に他方のマニホルド部材54の環状突出端部55の外面
56を嵌め込むことにより各マニホルド部材51、54を連結
してなる分割型排気マニホルドを開示している。この分
割型排気マニホルドでは、嵌め込み側のマニホルド部材
54の環状突出端部55の外面56に数条の溝58が形成されて
おり、これにピストンリング状のシールリング59が装着
され、シールリング59がマニホルド部材51の環状突出端
部52の内面53に摺接することにより、排気ガスの漏洩が
防止されている。また実開昭55-163425 号には、図６に
示すように、環状突出端部内面53又は環状突出端部外面
56の一方又は双方に複数条の環条溝60を形成し、シール
リングを装着しないで排気ガスの洩れ防止対策を行う構
造の分割型排気マニホルドも開示している。For example, Japanese Utility Model Laid-Open No. 55-163425 discloses, as shown in FIG. 5, an inner surface 53 of an annular projecting end portion 52 of one manifold member 51 and an outer surface of an annular projecting end portion 55 of the other manifold member 54.
Disclosed is a split type exhaust manifold in which the manifold members 51 and 54 are connected by fitting 56. In this split exhaust manifold, the fitting side manifold member
A plurality of grooves 58 are formed on the outer surface 56 of the annular projecting end portion 55 of 54, and a piston ring-shaped seal ring 59 is attached to this, and the seal ring 59 is the inner surface of the annular projecting end portion 52 of the manifold member 51. The sliding contact with the 53 prevents the exhaust gas from leaking. Further, in Japanese Utility Model Laid-Open No. 55-163425, as shown in FIG. 6, the inner surface 53 of the annular protruding end or the outer surface of the annular protruding end is
There is also disclosed a split exhaust manifold having a structure in which a plurality of annular grooves 60 are formed in one or both of 56, and a measure for preventing leakage of exhaust gas is provided without mounting a seal ring.
【０００４】実開昭55-163425 号の分割型排気マニホル
ドは、図５及び図６に示すいずれの場合も、通常のエン
ジンの運転・停止に伴う熱応力や排気ガスのシール性等
に対しては優れているが、過給機（ターボチヤージヤ）
付エンジンや排気ブレーキ付エンジンでは、より高圧の
排気ガスが流れるので、環状突出端部内面53及び環状突
出端部外面56の隙間に排気ガスが浸入し易い。そこでマ
ニホルド部材51、54が耐熱鋳鉄材であると、エンジンの
長時間運転により排気ガスによる酸化や腐食が進行し、
図５の丸図に示すように酸化腐食層62が生成される。酸
化腐食層62が成長すると、環状突出端部内面53と環状突
出端部外面56が固着し、エンジンの加熱・冷却に伴う熱
膨張・熱収縮に対応して伸縮できなくなる。このため加
熱時にマニホルド全体が伸長し、取り付けボルトが損傷
するだけでなく、マニホルド部材51、54に亀裂が発生し
易くなり、排気ガスが洩れるおそれもある。In any of the cases shown in FIGS. 5 and 6, the split type exhaust manifold of Japanese Utility Model Laid-Open No. 55-163425 has a thermal stress and exhaust gas sealability associated with normal engine operation and shutdown. Is excellent, but supercharger (turbocharger)
In a diesel engine and an engine with an exhaust brake, higher-pressure exhaust gas flows, so that the exhaust gas easily enters the gap between the annular protruding end inner surface 53 and the annular protruding end outer surface 56. Therefore, if the manifold members 51, 54 are heat-resistant cast iron materials, oxidation and corrosion due to exhaust gas will progress due to long-term operation of the engine,
As shown in the circle diagram of FIG. 5, an oxidative corrosion layer 62 is formed. When the oxidative corrosion layer 62 grows, the inner surface 53 of the annular projecting end portion and the outer surface 56 of the annular projecting end portion adhere to each other, and cannot expand or contract in response to thermal expansion / contraction due to heating / cooling of the engine. For this reason, not only the mounting bolt is damaged due to the expansion of the entire manifold during heating, but also cracks are likely to occur in the manifold members 51 and 54, and exhaust gas may leak.
【０００５】また特開平5-86855 号は、図７に示すよう
に、一方のマニホルド部材71の環状突出端部72の内面73
と他方のマニホルド部材75の環状突出端部76の内面77の
内側にインナパイプ78が嵌入されて連結部を構成し、双
方のマニホルド部材71，75の外面に、内側に屈曲した筒
部81ａ、81ｂを両側に有する蛇腹部82からなるフレキシ
ブル管80が装着され、連結部を密封した構造の分割型排
気マニホルドを開示している。このフレキシブル管80の
筒部81ａ，81ｂの外周には、当て金84ａ，84ｂが装着さ
れており、フレキシブル管80と当て金84ａ，84ｂはマニ
ホルド部材71，75の外面に一体に溶接されている。溶接
部86ａ，86ｂにより連結部が密封されて排気ガスの洩れ
が防止されるとともに、フレキシブル管80が当て金84
ａ，84ｂの角部に当たって傷つくのも防止される。Further, Japanese Patent Laid-Open No. 5-86855 discloses an inner surface 73 of an annular projecting end 72 of one manifold member 71, as shown in FIG.
An inner pipe 78 is fitted inside the inner surface 77 of the annular projecting end portion 76 of the other manifold member 75 to form a connecting portion, and on the outer surfaces of both of the manifold members 71 and 75, a cylindrical portion 81a bent inward, Disclosed is a split type exhaust manifold having a structure in which a flexible pipe 80 including a bellows portion 82 having 81b on both sides is mounted and a connecting portion is sealed. Pads 84a and 84b are attached to the outer peripheries of the tubular portions 81a and 81b of the flexible pipe 80, and the flexible pipe 80 and the pads 84a and 84b are integrally welded to the outer surfaces of the manifold members 71 and 75. . The welded portions 86a and 86b seal the connecting portion to prevent the exhaust gas from leaking, and the flexible pipe 80 is attached to the pad 84.
It is also prevented from hitting the corners of a and 84b and being damaged.
【０００６】しかしながら、特開平5-86855 号の分割型
排気マニホルドでは、連結部がインナパイプ78とフレキ
シブル管80のみからなるので、剛性が低く、エンジンへ
の取り付けの際に作業性が悪いという問題がある。また
マニホルド部材71，75の各環状突出端部72、76の内面7
3，77とこれらの中に嵌入されるインナパイプ78との間
に酸化腐食層（図示せず）が生成され、酸化腐食層が成
長すると、環状突出端部72、76の内面73，77とインナパ
イプ78が固着し、エンジンの加熱・冷却に伴う熱膨張・
熱収縮に対応して伸縮できなくなる。このためマニホル
ド部材71，75及びインナパイプ78に亀裂が発生し易くな
り、排気ガスが洩れるおそれがある。However, in the split exhaust manifold of Japanese Patent Laid-Open No. 5-86855, since the connecting portion is composed only of the inner pipe 78 and the flexible pipe 80, the rigidity is low and the workability is poor when mounting on the engine. There is. Also, the inner surface 7 of each annular projecting end 72, 76 of the manifold members 71, 75
When an oxidative corrosion layer (not shown) is generated between 3, 77 and the inner pipe 78 fitted therein, and the oxidative corrosion layer grows, the inner surface 73, 77 of the annular protruding ends 72, 76 becomes Inner pipe 78 sticks and causes thermal expansion due to engine heating and cooling.
It will not be able to expand and contract in response to heat shrinkage. Therefore, cracks are likely to occur in the manifold members 71, 75 and the inner pipe 78, and the exhaust gas may leak.
【０００７】従って本発明の目的は、複数のマニホルド
部材により構成される連結部が酸化腐食してもマニホル
ド部材が固着することが実質的になく、エンジンの加熱
・冷却に伴う熱膨張・熱収縮に対応して連結部が伸縮す
ることによりマニホルド部材の亀裂発生を防止するとと
もに、連結部からの排気ガスの洩れも防止した構造を有
する分割型排気マニホルドを提供することである。Therefore, an object of the present invention is to substantially prevent the manifold members from sticking to each other even if the connecting portion formed by the plurality of manifold members is oxidized and corroded, and the thermal expansion and contraction associated with the heating and cooling of the engine. Accordingly, it is an object of the present invention to provide a split exhaust manifold having a structure in which the occurrence of cracks in the manifold member due to expansion and contraction of the connecting portion is prevented, and leakage of exhaust gas from the connecting portion is also prevented.
【０００８】[0008]
【課題を解決するための手段】上記目的に鑑み鋭意研究
の結果、本発明者は、両マニホルド部材の環状突出端部
の間に滑動部材を配置するとともに、マニホルド部材の
連結部全体を覆うようにフレキシブル管をマニホルド部
材の外面に連続的に溶接することにより、連結部の酸化
腐食による固着を防止するとともに、連結部からの排気
ガスの洩れも防止することができることを発見し、本発
明を完成した。As a result of earnest research in view of the above object, the present inventor has arranged a sliding member between the annular projecting end portions of both manifold members and covers the entire connecting portion of the manifold members. By continuously welding the flexible pipe to the outer surface of the manifold member, it is possible to prevent sticking due to oxidative corrosion of the connecting portion and also to prevent leakage of exhaust gas from the connecting portion, and the present invention is provided. completed.
【０００９】すなわち本発明の分割型排気マニホルド
は、少なくとも２つのマニホルド部材からなり、一方の
マニホルド部材の環状突出端部内に他方のマニホルド部
材の環状突出端部が挿入されて連結部を構成する構造を
有するもので、(a) 前記一方のマニホルド部材の環状突
出端部と前記他方のマニホルド部材の環状突出端部との
間に配置された滑動部材と、(b) 蛇腹部とその両側に一
体的に延在する筒部とからなり、前記連結部全体を覆う
ように軸方向に延在するフレキシブル管とを有し、前記
フレキシブル管の前記筒部は前記マニホルド部材の外面
に連続的に溶接されており、もって前記連結部は前記フ
レキシブル管により完全に密封されていることを特徴と
する。That is, the split exhaust manifold of the present invention comprises at least two manifold members, and the annular projecting end portion of the other manifold member is inserted into the annular projecting end portion of the other manifold member to form a connecting portion. (A) a sliding member arranged between the annular projecting end of the one manifold member and the annular projecting end of the other manifold member, and (b) the bellows part and both sides thereof integrally. A flexible pipe extending in the axial direction so as to cover the entire connecting portion, and the flexible pipe is continuously welded to the outer surface of the manifold member. Therefore, the connecting portion is completely sealed by the flexible tube.
【００１０】[0010]
【発明の実施の形態】本発明の好ましい実施態態を添付
の図１乃至図４を参照して、以下詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below in detail with reference to the accompanying FIGS.
【００１１】[1] 第一実施態様 図１(a) は本発明の第一実施態様による分割型排気マニ
ホルド１の全体を示す側面図であり、図１(b) はその平
面図である。この分割型排気マニホルド１は直列６気筒
の過給機付き大型貨物自動車用ディーゼルエンジンに使
用するものである。分割型排気マニホルド１は、複数の
マニホルド部材２，３と、隣接するマニホルド部材間の
連結部５とを有する。各マニホルド部材２，３はエンジ
ンの各気筒に連通する排気ガス吸入口７を有し、各吸入
口７が連通する連通路10は左右に分離していて、それぞ
れ排気口11に連通している。吸入口７の周囲にはフラン
ジ部８が形成され、各フランジ部８にはネジ穴８ａが形
成されている。[1] First Embodiment FIG. 1 (a) is a side view showing the whole of the split type exhaust manifold 1 according to the first embodiment of the present invention, and FIG. 1 (b) is a plan view thereof. This split type exhaust manifold 1 is used for a diesel engine for a large truck with an in-line 6-cylinder supercharger. The split exhaust manifold 1 has a plurality of manifold members 2 and 3 and a connecting portion 5 between adjacent manifold members. Each of the manifold members 2 and 3 has an exhaust gas intake port 7 that communicates with each cylinder of the engine, and a communication passage 10 that communicates with each intake port 7 is divided into left and right and communicates with an exhaust port 11 respectively. . A flange portion 8 is formed around the suction port 7, and each flange portion 8 is formed with a screw hole 8a.
【００１２】図２は、図１の分割型排気マニホルド１の
連結部５の詳細を示す部分断面図である。分割型排気マ
ニホルド１は、エンジン（図示せず）の各気筒から排出
される排気ガスを、マニホルド部材２，３の連通路10を
矢印Ａで示す方向に通し、排気口11を経て過給機（図示
せず）に導く。マニホルド部材２は連通路10より大きい
内径を有する環状突出端部12を有し、またマニホルド部
材３は連通路10と同じ内径を有するともに環状突出端部
12内に適当な空隙をもって嵌入する環状突出端部13を有
する。環状突出端部12，13は、熱亀裂や変形が起こらな
いように、適当な肉厚を有するのが好ましい。FIG. 2 is a partial sectional view showing details of the connecting portion 5 of the split type exhaust manifold 1 of FIG. The split type exhaust manifold 1 allows exhaust gas discharged from each cylinder of an engine (not shown) to pass through a communication passage 10 of the manifold members 2 and 3 in a direction indicated by an arrow A, and through a discharge port 11 to a supercharger. (Not shown). The manifold member 2 has an annular projecting end 12 having an inner diameter larger than that of the communicating passage 10, and the manifold member 3 has the same inner diameter as the communicating passage 10 and an annular projecting end.
It has an annular projecting end 13 which fits within 12 with a suitable gap. The annular protruding ends 12, 13 preferably have a suitable wall thickness so that thermal cracking and deformation do not occur.
【００１３】図２に示すように、環状突出端部12と環状
突出端部13との空隙に滑動部材15が挿入されている。滑
動部材15は耐熱性及び耐酸化性を有する材質からなるの
が好ましく、例えばステンレススチール製とするのが好
ましい。滑動部材15は両環状突出端部12，13の間に遊嵌
していても、又は環状突出端部12，13の一方に固定して
いても良い。滑動部材15の肉厚は0.2 〜１mm程度、特に
0.3 〜0.7 mm程度が好ましく、また長さは各環状突出端
部12，13と同程度か、滑動できる範囲で短くても良い。As shown in FIG. 2, a sliding member 15 is inserted in a gap between the annular protruding end 12 and the annular protruding end 13. The sliding member 15 is preferably made of a material having heat resistance and oxidation resistance, and is preferably made of stainless steel, for example. The sliding member 15 may be loosely fitted between the annular protruding ends 12 and 13 or may be fixed to one of the annular protruding ends 12 and 13. The thickness of the sliding member 15 is about 0.2 to 1 mm, especially
It is preferably about 0.3 to 0.7 mm, and the length thereof may be the same as that of the annular projecting end portions 12 and 13, or may be short within a slidable range.
【００１４】図４に示すように、滑動部材15は、(a) ス
リットのない円筒体、(b) 両端面間に延在する直線状の
スリット15ｂを有する円筒体、(c) 排気ガスが通過しに
くいようにジグザグ状で傾斜したスリット15ｃを有する
円筒体等の形状にするのが好ましい。As shown in FIG. 4, the sliding member 15 includes (a) a cylindrical body having no slits, (b) a cylindrical body having linear slits 15b extending between both end surfaces, and (c) exhaust gas. It is preferable to have a shape such as a cylindrical body having a zigzag-shaped slanted slit 15c so as to prevent passage through.
【００１５】(a) の場合、滑動部材15は両環状突出端部
12，13の間に遊嵌され、環状突出端部12の内面12ａ及び
環状突出端部13の外面13ａに対して摺動可能である。
(b) の場合、滑動部材15の内外径の大きさに応じて、環
状突出端部12の内面12ａに固定されるか、環状突出端部
13の外面13ａに固定される。具体的には、滑動部材15の
外径が環状突出端部12の内面12ａより僅かに大きいと、
スリット15ｂを縮小して挿入することにより滑動部材15
は環状突出端部12の内面12ａに固定される。また滑動部
材15の内径が環状突出端部13の外面13ａにより僅かに小
さいと、スリット15ｂを拡開して挿入することにより滑
動部材15は環状突出端部13の外面13ａに固定される。
(c) の場合は基本的に(b) の場合と同じである。In the case of (a), the sliding member 15 has both annular protruding end portions.
It is loosely fitted between 12 and 13 and slidable with respect to the inner surface 12a of the annular protruding end 12 and the outer surface 13a of the annular protruding end 13.
In the case of (b), depending on the inner and outer diameters of the sliding member 15, the sliding member 15 is fixed to the inner surface 12a of the annular protruding end portion 12, or the annular protruding end portion is fixed.
It is fixed to the outer surface 13a of 13. Specifically, when the outer diameter of the sliding member 15 is slightly larger than the inner surface 12a of the annular projecting end portion 12,
The sliding member 15 is formed by reducing the slit 15b and inserting it.
Is fixed to the inner surface 12a of the annular protruding end 12. When the inner diameter of the sliding member 15 is slightly smaller than the outer surface 13a of the annular protruding end portion 13, the sliding member 15 is fixed to the outer surface 13a of the annular protruding end portion 13 by expanding and inserting the slit 15b.
Case (c) is basically the same as case (b).
【００１６】各マニホルド部材２，３の連結部５を密封
するために、その周囲にフレキシブル管20が設けられて
いる。フレキシブル管20は、中央の蛇腹部22と、その軸
方向両側に位置する筒部24ａ，24ｂとからなる。フレキ
シブル管20の蛇腹部22の軸方向両側に位置する各筒部24
ａ，24ｂは、蛇腹部22を半径方向外側に屈曲することに
より形成することができる。In order to seal the connecting portion 5 of each of the manifold members 2 and 3, a flexible tube 20 is provided around it. The flexible tube 20 includes a central bellows portion 22 and tubular portions 24a and 24b located on both sides in the axial direction thereof. Each tubular portion 24 located on both sides in the axial direction of the bellows portion 22 of the flexible pipe 20.
The a and 24b can be formed by bending the bellows portion 22 outward in the radial direction.
【００１７】各筒部24ａ，24ｂの先端部は、各マニホル
ド部材２，３の外面２ａ，３ａに形成された環状段部2
6，28に当接されている。フレキシブル管20を固定する
ために、筒部24ａ，24ｂの先端部の外周に当て金30を配
置するのが好ましい。当て金30を配置した場合、図２の
参照番号32で示すように、フレキシブル管20の筒部24
ａ，24ｂ及び当て金30は各マニホルド部材２，３の外面
２ａ，３ａの全周に溶接される。この構造により、各マ
ニホルド部材２，３にフレキシブル管20が密封状態で溶
接されることとなる。The tip ends of the tubular portions 24a and 24b are annular step portions 2 formed on the outer surfaces 2a and 3a of the manifold members 2 and 3, respectively.
It is in contact with 6, 28. In order to fix the flexible tube 20, it is preferable to dispose a pad 30 on the outer circumference of the tip portions of the tubular portions 24a and 24b. When the pad 30 is arranged, as shown by the reference numeral 32 in FIG.
The a and 24b and the pad 30 are welded to the entire outer surfaces 2a and 3a of the manifold members 2 and 3, respectively. With this structure, the flexible pipe 20 is welded in a sealed state to the manifold members 2 and 3.
【００１８】図２には、フレキシブル管20の筒部24ａ，
24ｂが環状段部26，28に当接した例が示されているが、
当て金30も環状段部26，28に当接するように、環状段部
26，28の高さを大きくしてもよい。また入れ子式に嵌め
あったマニホルド部材２，３の環状突出端部12，13の軸
方向間隔（環状突出端部12の根元と環状突出端部13の端
面との間隔）Ｌは、分割型排気マニホルド１の熱膨張と
熱収縮の差の最大値より僅かに大きく設定するのが好ま
しい。これにより、各マニホルド部材２，３の端面が相
互に干渉するのが防止される。In FIG. 2, the tubular portion 24a of the flexible tube 20,
An example in which 24b abuts on the annular step portions 26, 28 is shown,
Make sure that the stopper plate 30 also comes into contact with the annular steps 26 and 28,
The height of 26, 28 may be increased. Further, the axial distance between the annular projecting end portions 12 and 13 of the manifold members 2 and 3 fitted in a telescopic manner (the distance between the root of the annular projecting end portion 12 and the end face of the annular projecting end portion 13) is a split type exhaust. It is preferable to set the value slightly larger than the maximum value of the difference between the thermal expansion and the thermal contraction of the manifold 1. This prevents the end faces of the manifold members 2 and 3 from interfering with each other.
【００１９】[2] 第二実施態様 図３は、本発明の第二実施態様による分割型排気マニホ
ルド１の連結部５を示す。この実施態様の分割型排気マ
ニホルド１の構造は、環状溝14及びそこに挿入するシー
ルリング16を除いて、第一実施態様の分割型排気マニホ
ルド１と全く同じである。従って、環状溝14及びシール
リング16についてのみ説明する。[2] Second Embodiment FIG. 3 shows a connecting portion 5 of the split exhaust manifold 1 according to a second embodiment of the present invention. The structure of the split exhaust manifold 1 of this embodiment is exactly the same as that of the split exhaust manifold 1 of the first embodiment except for the annular groove 14 and the seal ring 16 inserted therein. Therefore, only the annular groove 14 and the seal ring 16 will be described.
【００２０】少なくとも１条（図示の例では２条）の環
状溝14が環状突出端部13の外面13ａに形成され、それに
装着されるシールリング16はピストンリング状である。
この実施態様では、滑動部材15はマニホルド部材２の環
状突出端部12の内面に固定されていて、シールリング16
の外面が滑動部材15の内面と摺接する。滑動部材15とし
ては図４(b) に示す形状のものが好ましい。At least one (two in the illustrated example) annular groove 14 is formed in the outer surface 13a of the annular projecting end portion 13, and the seal ring 16 attached thereto has a piston ring shape.
In this embodiment, the sliding member 15 is fixed to the inner surface of the annular projecting end 12 of the manifold member 2 and the sealing ring 16
The outer surface of the sliding contact with the inner surface of the sliding member 15. The sliding member 15 preferably has a shape shown in FIG. 4 (b).
【００２１】上記分割型排気マニホルド１のいずれの場
合も、滑動部材15が耐熱性及び耐酸化性を有する材質か
らなるので、長期間の使用によりマニホルド部材２，３
が酸化腐食しても、滑動部材15によりマニホルド部材
２，３の固着が防止される。またエンジンの加熱・冷却
に伴う熱膨張・熱収縮に対応して連結部が伸縮すること
により、亀裂発生を防止するとともに、連結部からの排
気ガスの洩れを防止することができる。In either case of the split exhaust manifold 1, since the sliding member 15 is made of a material having heat resistance and oxidation resistance, the manifold members 2 and 3 can be used for a long period of time.
Even if oxidative corrosion occurs, the sliding member 15 prevents the manifold members 2 and 3 from sticking to each other. Further, expansion and contraction of the connecting portion in response to thermal expansion and contraction associated with heating and cooling of the engine can prevent cracking and prevent exhaust gas from leaking from the connecting portion.
【００２２】本発明を以下の具体的実施例によりさらに
詳細に説明するが、本発明はそれらに限定されるもので
はない。The present invention will be described in more detail with reference to the following specific examples, but the present invention is not limited thereto.
【００２３】実施例１ 図１及び図２に示す構造の分割型排気マニホルドを作製
した。吸入口７の間隔は170 mmで、連通路10の内径は55
mmであった。 Example 1 A split type exhaust manifold having the structure shown in FIGS. 1 and 2 was produced. The distance between the suction ports 7 is 170 mm, and the inner diameter of the communication passage 10 is 55 mm.
It was mm.
【００２４】マニホルド部材２，３はそれぞれ高Si球状
黒鉛鋳鉄材により形成し、マニホルド部材２の環状突出
端部12（長さ34mm）の内面12ａを66mm（寸法公差：＋0.
030mm〜０mm）に機械加工し、またマニホルド部材３の
環状突出端部13（長さ34mm）の外面13ａを65mm（寸法公
差：−0.030 mm〜−0.060 mm）に機械加工した。さらに
マニホルド部材２，３の外面２ａ，３ｂ上の段部26，28
を80mm（寸法公差：＋０mm〜−0.3 mm）の外径となるよ
うに機械加工した。The manifold members 2 and 3 are each formed of a high Si spheroidal graphite cast iron material, and the inner surface 12a of the annular projecting end portion 12 (length 34 mm) of the manifold member 2 is 66 mm (dimensional tolerance: +0.
030 mm to 0 mm) and the outer surface 13a of the annular protruding end 13 (length 34 mm) of the manifold member 3 was machined to 65 mm (dimensional tolerance: -0.030 mm to -0.060 mm). Further, the step portions 26, 28 on the outer surfaces 2a, 3b of the manifold members 2, 3
Was machined to have an outer diameter of 80 mm (dimensional tolerance: +0 mm to −0.3 mm).
【００２５】図４(a) の形状を有する滑動部材15［外径
66mm（寸法公差：−0.030 mm〜−0.060 mm）、内径65mm
（寸法公差：＋0.030 mm〜０mm）］をステンレス磨鋼
（JISSUS430）から形成し、マニホルド部材２の環状突
出端部12内に挿入した。またマニホルド部材２，３の長
手方向の熱膨張による干渉を防止するために、端面間隔
Ｌを４mmとした。The sliding member 15 having the shape shown in FIG.
66 mm (Dimensional tolerance: −0.030 mm to −0.060 mm), inner diameter 65 mm
(Dimensional tolerance: +0.030 mm to 0 mm)] made of stainless polished steel (JISSUS430) and inserted into the annular protruding end 12 of the manifold member 2. Further, in order to prevent interference due to thermal expansion in the longitudinal direction of the manifold members 2 and 3, the end face distance L is set to 4 mm.
【００２６】次に厚さ0.6 mmのステンレススチール製磨
鋼（JIS SUS403）を、図２(b) に示すように、内径が8
0.4mm（寸法公差：＋０mm〜−0.3 mm）で外径が100 mm
の蛇腹状となるように加工して、蛇腹部22とするととも
に、蛇腹部22の両側を軸方向外側に屈曲して筒部24ａ，
24ｂとした。このようにして得られたフレキシブル管20
は５山（図２(b) では簡略化のために「３山」として示
してある。）の蛇腹部22を有する形状であった。また厚
さ0.6 mmのステンレス磨鋼（JIS SUS403）を内径81.6mm
（寸法公差：＋0.3 mm〜＋0.5 mm）、幅７mmのバンド状
に加工し、環状の当て金30を形成した。Next, as shown in FIG. 2 (b), a stainless steel polished steel (JIS SUS403) having a thickness of 0.6 mm has an inner diameter of 8 mm.
0.4 mm (Dimensional tolerance: +0 mm to -0.3 mm) with an outer diameter of 100 mm
The bellows portion 22 is processed to have a bellows shape, and both sides of the bellows portion 22 are bent outward in the axial direction to form a tubular portion 24a,
24b. Flexible tube 20 thus obtained
Was a shape having five bellows (in FIG. 2B, shown as “three peaks” for simplification). Also, a 0.6 mm thick stainless polished steel (JIS SUS403) is used with an inner diameter of 81.6 mm.
(Dimensional tolerance: +0.3 mm to +0.5 mm) and processed into a band shape having a width of 7 mm to form an annular backing plate 30.
【００２７】図２(b) に示すにように、分割型排気マニ
ホルド１のマニホルド部材２，３、フレキシブル管20及
び当て金30を同軸的に配置し、矢印Ｂの方向にマニホル
ド部材３移動させて、組立てを行った。この際、まずフ
レキシブル管20の筒部24ａ，24ｂをマニホルド部材２，
３の外面上の段部26，28に当接させた後で、当て金30を
装着した。この状態でマニホルド部材２，３にフレキシ
ブル管20の筒部24ａ，24ｂ及び当て金30を連続的に隙間
なく溶接した。As shown in FIG. 2 (b), the manifold members 2, 3 of the split type exhaust manifold 1, the flexible pipe 20, and the pad 30 are coaxially arranged, and the manifold member 3 is moved in the direction of arrow B. And assembled. At this time, first, the tube portions 24a and 24b of the flexible pipe 20 are connected to the manifold member 2,
After contacting the stepped portions 26 and 28 on the outer surface of 3, the pad 30 was attached. In this state, the tubular portions 24a and 24b of the flexible pipe 20 and the metal plate 30 were continuously welded to the manifold members 2 and 3 without any gap.
【００２８】上記構造を有する分割型排気マニホルド１
を、直列６気筒の過給機付き大型貨物自動車用ディーゼ
ルエンジンの各気筒に取り付け、2000rpm ×全負荷での
300時間連続耐久テストを行った。さらに2000rpm ×全
負荷で５分間、500rpm×無負荷を５分間（アイドリン
グ）の１サイクル10分間の冷熱サイクルテストを1800回
（300 時間）行い、分割型排気マニホルド１のマニホル
ド部材２，３が固着するか否かを調べた。その結果、マ
ニホルド部材２，３の内面に酸化腐食が生じても連結部
５での固着は起こらなかった。Split type exhaust manifold 1 having the above structure
Is attached to each cylinder of a diesel engine for large trucks with an inline 6-cylinder supercharger at 2000 rpm × full load.
A continuous durability test was performed for 300 hours. Further, a cooling / heating cycle test of 2000 rpm x full load for 5 minutes and 500 rpm x no load for 5 minutes (idling) for 10 minutes per cycle was performed 1800 times (300 hours), and the manifold members 2 and 3 of the split exhaust manifold 1 were fixed. I checked whether or not to do it. As a result, even if oxidative corrosion occurred on the inner surfaces of the manifold members 2 and 3, the fixing at the connecting portion 5 did not occur.
【００２９】実施例２ 図１及び図３に示す構造の分割型排気マニホルドを作製
した。吸入口７の間隔は170 mmで、連通路10の内径は55
mmであった。 Example 2 A split type exhaust manifold having the structure shown in FIGS. 1 and 3 was produced. The distance between the suction ports 7 is 170 mm, and the inner diameter of the communication passage 10 is 55 mm.
It was mm.
【００３０】実施例１と同じマニホルド部材２，３及び
滑動部材15を作製した。マニホルド部材３の環状突出端
部13の外面13ａに２条の環状溝14（深さ2.5 mm、幅2.0
mm）を形成した。また各環状溝14に装着するステンレス
スチール（JIS SUS403）製ピストンリング状シールリン
グ16（外径66mm、内径61mm、幅1.8 mm）を作製した。The same manifold members 2 and 3 and sliding member 15 as in Example 1 were produced. On the outer surface 13a of the annular protruding end 13 of the manifold member 3, two annular grooves 14 (depth 2.5 mm, width 2.0
mm) formed. Further, a stainless steel (JIS SUS403) piston ring seal ring 16 (outer diameter 66 mm, inner diameter 61 mm, width 1.8 mm) to be mounted in each annular groove 14 was produced.
【００３１】環状溝14内にシールリング16を装着した
後、実施例１と同じようにして、分割型排気マニホルド
１のマニホルド部材２，３、フレキシブル管20及び当て
金30を同軸的に配置し、矢印Ｂの方向にマニホルド部材
３移動させて、組立てを行った。組み立てた後、マニホ
ルド部材２，３にフレキシブル管20の筒部24ａ，24ｂ及
び当て金30を連続的に隙間なく溶接した。After mounting the seal ring 16 in the annular groove 14, the manifold members 2 and 3 of the split exhaust manifold 1, the flexible pipe 20 and the backing plate 30 are coaxially arranged in the same manner as in the first embodiment. , The manifold member 3 was moved in the direction of arrow B to assemble. After assembling, the tubular members 24a and 24b of the flexible pipe 20 and the pad 30 were continuously welded to the manifold members 2 and 3 without any gap.
【００３２】上記構造を有する分割型排気マニホルド１
に対して、実施例１と同じテストを行ったところ、マニ
ホルド部材２，３の内面に酸化腐食が生じても連結部５
での固着が起こらないことが分かった。Split type exhaust manifold 1 having the above structure
On the other hand, when the same test as in Example 1 was performed, even if oxidative corrosion occurred on the inner surfaces of the manifold members 2 and 3, the connecting portion 5
It was found that sticking did not occur in.
【００３３】[0033]
【発明の効果】以上詳述したとおり、本発明の分割型排
気マニホルドは、隣接するマニホルド部材の環状突出端
部の間に滑動部材を挿入するとともに、マニホルド部材
の外面にフレキシブル管を連続的に溶接することによ
り、連結部を完全に密封した構造を有する。滑動部材は
耐熱性及び耐酸化性を有する材質からなるので、長期間
の使用によりマニホルド部材２，３が酸化腐食しても、
マニホルド部材２，３の固着は防止される。またフレキ
シブル管のマニホルド部材外面への連続的溶接により連
結部が完全に密封されているので、滑動部材が挿入され
た環状突出端部間に隙間があっても、排気ガスが外部に
漏洩することはない。さらに、エンジンの加熱・冷却に
伴う熱膨張・熱収縮に対応して連結部が伸縮自在である
ので、亀裂発生を防止することができる。As described above in detail, in the split type exhaust manifold of the present invention, the sliding member is inserted between the annular protruding ends of the adjacent manifold members, and the flexible pipe is continuously provided on the outer surface of the manifold member. It has a structure in which the joint is completely sealed by welding. Since the sliding member is made of a material having heat resistance and oxidation resistance, even if the manifold members 2 and 3 are oxidatively corroded due to long-term use,
Sticking of the manifold members 2, 3 is prevented. Also, since the connecting portion is completely sealed by continuous welding of the flexible pipe to the outer surface of the manifold member, even if there is a gap between the annular protruding ends into which the sliding member is inserted, exhaust gas will not leak to the outside. There is no. Furthermore, since the connecting portion can expand and contract in response to thermal expansion and contraction associated with heating and cooling of the engine, cracking can be prevented.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例による分割型排気マニホルド
の全体形状を示し、(a) は側面図であり、(b) は平面図
である。FIG. 1 shows an overall shape of a split type exhaust manifold according to an embodiment of the present invention, (a) is a side view and (b) is a plan view.
【図２】本発明の一実施例による分割型排気マニホルド
の連結部を示し、(a) は拡大断面図であり、(b) は部分
端面図である。FIG. 2 shows a connecting portion of a split exhaust manifold according to an embodiment of the present invention, (a) is an enlarged sectional view, and (b) is a partial end view.
【図３】本発明の別の実施例による分割型排気マニホル
ドの連結部を示し、(a) は拡大断面図であり、(b) は部
分端面図である。FIG. 3 shows a connecting portion of a split type exhaust manifold according to another embodiment of the present invention, (a) is an enlarged sectional view, and (b) is a partial end view.
【図４】種々の滑動部材を示す斜視図であり、(a) は円
筒状の滑動部材を示し、(b) は直線状のスリットを有す
る円筒状滑動部材を示し、(c) はジグザグ状のスリット
を有する円筒状滑動部材を示す。FIG. 4 is a perspective view showing various sliding members, (a) showing a cylindrical sliding member, (b) showing a cylindrical sliding member having a linear slit, and (c) showing a zigzag shape. 3 shows a cylindrical sliding member having a slit.
【図５】従来の分割型排気マニホルドの連結部の一例を
示す断面図である。FIG. 5 is a cross-sectional view showing an example of a connecting portion of a conventional split exhaust manifold.
【図６】従来の分割型排気マニホルドの連結部の他の例
を示す断面図である。FIG. 6 is a cross-sectional view showing another example of the connecting portion of the conventional split type exhaust manifold.
【図７】従来の分割型排気マニホルドの連結部のさらに
他の例を示す部分断面側面図である。FIG. 7 is a partial cross-sectional side view showing still another example of the connecting portion of the conventional split type exhaust manifold.
１・・ ・分割型排気マニホルド ２，３・・マニホルド部材 ５・・・・連結部 ７・・・・吸入口 ８・・・・フランジ部 10・・・・連通路 12，13・・環状突出端部 14・・・・環状溝 16・・・・シールリング 15・・・・滑動部材 20・・・・フレキシブル管 22・・・・蛇腹部 24ａ，24ｂ・・筒部 26、28・・段部 30・・・・当て金 32・・・・溶接部 1 ・ ・ ・ Split exhaust manifold 2,3 ・ ・ Manifold member 5 ・ ・ ・ ・ Connecting part 7 ・ ・ ・ ・ ・ ・ Suction port 8 ・ ・ ・ ・ ・ ・ Flange part 10 ・ ・ ・ ・ ・ ・ Communicating passage 12,13 ・ ・ Ring End 14 ・ ・ ・ ・ Annular groove 16 ・ ・ ・ ・ ・ ・ Seal ring 15 ・ ・ ・ ・ Sliding member 20 ・ ・ ・ ・ Flexible tube 22 ・ ・ ・ ・ Bellows 24a, 24b ・ ・ Cylinders 26, 28 ・ ・ Steps Part 30 ・ ・ ・ ・ Piece 32 ・ ・ ・ ・ Welded part
Claims (6)
り、一方のマニホルド部材の環状突出端部内に他方のマ
ニホルド部材の環状突出端部が挿入されて連結部を構成
する構造の分割型排気マニホルドにおいて、(a) 前記一
方のマニホルド部材の環状突出端部と前記他方のマニホ
ルド部材の環状突出端部との間に配置された滑動部材
と、(b) 蛇腹部とその両側に一体的に延在する筒部とか
らなり、前記連結部全体を覆うように軸方向に延在する
フレキシブル管とを有し、前記フレキシブル管の前記筒
部は前記マニホルド部材の外面に連続的に溶接されてお
り、もって前記連結部は前記フレキシブル管により完全
に密封されていることを特徴とする分割型排気マニホル
ド。1. A split exhaust manifold having a structure comprising at least two manifold members, wherein the annular projecting end of one manifold member is inserted into the annular projecting end of the other manifold member to form a connecting portion. a) a sliding member arranged between the annular projecting end of the one manifold member and the annular projecting end of the other manifold member, and (b) a bellows part and a cylinder integrally extending on both sides thereof. And a flexible pipe extending in the axial direction so as to cover the entire connecting portion, and the tubular portion of the flexible pipe is continuously welded to the outer surface of the manifold member, The split exhaust manifold, wherein the connecting portion is completely sealed by the flexible pipe.
において、前記滑動部材は耐熱性及び耐酸化性を有する
金属材料からなる円環状の部材であることを特徴とする
分割型排気マニホルド。2. The split type exhaust manifold according to claim 1, wherein the sliding member is an annular member made of a metal material having heat resistance and oxidation resistance.
において、前記滑動部材に両端間を延在するスリットが
設けられており、前記滑動部材はその弾発力により前記
一方のマニホルド部材の環状突出端部の内面又は前記他
方のマニホルド部材の環状突出端部の外面に固定されて
いることを特徴とする分割型排気マニホルド。3. The split exhaust manifold according to claim 2, wherein the sliding member is provided with a slit extending between both ends, and the sliding member has an annular shape of the one manifold member due to its elastic force. A split exhaust manifold, wherein the split exhaust manifold is fixed to the inner surface of the projecting end or the outer surface of the annular projecting end of the other manifold member.
排気マニホルドにおいて、前記フレキシブル管の前記筒
部の外面に環状の当て金が設けられており、前記フレキ
シブル管及び前記当て金はともに前記マニホルド部材の
外面に溶接されていることを特徴とする分割型排気マニ
ホルド。4. The split type exhaust manifold according to claim 1, wherein an annular pad is provided on an outer surface of the cylindrical portion of the flexible pipe, and the flexible pipe and the pad are provided. A split exhaust manifold, characterized in that both are welded to the outer surface of the manifold member.
排気マニホルドにおいて、前記他方のマニホルド部材の
環状突出端部の外面に形成された複数の環状溝にシール
リングが設けられおり、前記滑動部材と前記シールリン
グとの摺接により前記連結部から排気ガスが洩れるのを
低減することを特徴とする分割型排気マニホルド。5. The split exhaust manifold according to claim 1, wherein a seal ring is provided in a plurality of annular grooves formed on the outer surface of the annular protruding end of the other manifold member, A split exhaust manifold, wherein exhaust gas is prevented from leaking from the connecting portion due to sliding contact between the sliding member and the seal ring.
気マニホルドにおいて、前記マニホルド部材の各々には
外周に環状の段部が形成されており、前記フレキシブル
管の前記筒部は前記段部に当接された状態で溶接されて
いることを特徴とする分割型排気マニホルド。6. The split exhaust manifold according to claim 1, wherein each of the manifold members is formed with an annular step portion on an outer periphery thereof, and the tubular portion of the flexible pipe is formed by the step portion. A split type exhaust manifold, which is welded while being in contact with a step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013339A JPH09296725A (en) | 1996-01-11 | 1997-01-09 | Split exhaust manifold |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP288396 | 1996-01-11 | ||
| JP4709296 | 1996-03-05 | ||
| JP8-2883 | 1996-03-05 | ||
| JP8-47092 | 1996-03-05 | ||
| JP9013339A JPH09296725A (en) | 1996-01-11 | 1997-01-09 | Split exhaust manifold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09296725A true JPH09296725A (en) | 1997-11-18 |
Family
ID=27275568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9013339A Pending JPH09296725A (en) | 1996-01-11 | 1997-01-09 | Split exhaust manifold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09296725A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100534979B1 (en) * | 2002-09-13 | 2005-12-08 | 현대자동차주식회사 | hose of an intake air system of automobile engine |
| JP2011122594A (en) * | 2009-12-14 | 2011-06-23 | Benteler Automobiltechnik Gmbh | Exhaust manifold having baffle plate |
| DE102011106242A1 (en) * | 2011-06-27 | 2012-12-27 | Tenneco Gmbh | Modular manifold for motor vehicles |
| CN106640314A (en) * | 2016-12-30 | 2017-05-10 | 中国第汽车股份有限公司 | Multi-segment type exhaust pipe structure |
| US20210088291A1 (en) * | 2019-09-23 | 2021-03-25 | Mahle International Gmbh | Tubular body arrangement for a temperature-control device |
-
1997
- 1997-01-09 JP JP9013339A patent/JPH09296725A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100534979B1 (en) * | 2002-09-13 | 2005-12-08 | 현대자동차주식회사 | hose of an intake air system of automobile engine |
| JP2011122594A (en) * | 2009-12-14 | 2011-06-23 | Benteler Automobiltechnik Gmbh | Exhaust manifold having baffle plate |
| US8549851B2 (en) | 2009-12-14 | 2013-10-08 | Benteler Automobiltechnik Gmbh | Exhaust manifold with baffle plate |
| DE102011106242A1 (en) * | 2011-06-27 | 2012-12-27 | Tenneco Gmbh | Modular manifold for motor vehicles |
| WO2013000919A1 (en) | 2011-06-27 | 2013-01-03 | Tenneco Gmbh | Modular manifold for motor vehicles |
| DE202012104051U1 (en) | 2011-06-27 | 2013-03-04 | Tenneco Gmbh | Modular manifold for motor vehicles |
| DE102011106242B4 (en) * | 2011-06-27 | 2015-07-23 | Tenneco Gmbh | Modular manifold for automotive and manufacturing processes |
| DE102011106242B9 (en) * | 2011-06-27 | 2015-12-24 | Tenneco Gmbh | Modular manifold for automotive and manufacturing processes |
| US9745885B2 (en) | 2011-06-27 | 2017-08-29 | Tenneco Gmbh | Modular manifold for motor vehicles |
| CN106640314A (en) * | 2016-12-30 | 2017-05-10 | 中国第汽车股份有限公司 | Multi-segment type exhaust pipe structure |
| US20210088291A1 (en) * | 2019-09-23 | 2021-03-25 | Mahle International Gmbh | Tubular body arrangement for a temperature-control device |
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