JPH0541223Y2 - - Google Patents
Info
- Publication number
- JPH0541223Y2 JPH0541223Y2 JP6888987U JP6888987U JPH0541223Y2 JP H0541223 Y2 JPH0541223 Y2 JP H0541223Y2 JP 6888987 U JP6888987 U JP 6888987U JP 6888987 U JP6888987 U JP 6888987U JP H0541223 Y2 JPH0541223 Y2 JP H0541223Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner shell
- exhaust
- tube
- hole
- joined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、排気マニホールド構造に係り、特に
耐久性を有するように形成された断熱性の排気マ
ニホールド構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an exhaust manifold structure, and more particularly to an insulating exhaust manifold structure formed to have durability.
［従来の技術］
一般にターボ過給機を備えた内燃機関の場合、
そのターボ過給機のタービンには内燃機関から排
出される排気の熱損失をできるだけ抑えて、エネ
ルギ大の高温な排気を供給する方が望ましい。ま
た、可動ノズルベーン等を有した可変容量ターボ
過給機を装着する場合には、供給する排気流の脈
動等による圧力変動をできるだけ少なくするため
に、その上流側に位置するシリンダに接続された
排気マニホールドに、排気を一旦集合させるため
の排気室（チヤンバ）を形成しておく必要があ
る。[Prior Art] Generally, in the case of an internal combustion engine equipped with a turbocharger,
It is desirable to suppress heat loss of the exhaust gas discharged from the internal combustion engine as much as possible and supply high-temperature exhaust gas with a large amount of energy to the turbine of the turbocharger. In addition, when installing a variable capacity turbocharger with movable nozzle vanes, etc., in order to minimize pressure fluctuations due to pulsation of the supplied exhaust flow, the exhaust gas connected to the cylinder located upstream of the It is necessary to form an exhaust chamber in the manifold to temporarily collect the exhaust gas.
このため、第５図および第６図に示すように、
従来上記排気マニホールドａは、内燃機関の各気
筒から排気を直方体状の内殻ｂとして形成した排
気室ｃ内に集合させて、その脈動を緩衝した後
に、排出下流側、即ち、過給機タービン側へ流出
させるようになつている。 Therefore, as shown in FIGS. 5 and 6,
Conventionally, the exhaust manifold a collects exhaust gas from each cylinder of an internal combustion engine into an exhaust chamber c formed as a rectangular parallelepiped inner shell b, buffers its pulsation, and then transfers the exhaust gas to the downstream side, that is, the supercharger turbine. It is designed to flow out to the side.
排気室ｃは、ステンレス鋼板等の耐熱金属によ
り形成され、その一側には、内燃機関の各気筒か
ら排気を流入させるための流入口ｄがその長手方
向に沿つて形成されており、流入口ｄの外方には
シリンダヘツド（図示せず）に連絡するための流
入管ｅが設けられている。また他側には、排気室
ｃ内の排気を、排出下流側へ導くための排出管ｆ
が形成されている。 The exhaust chamber c is formed of a heat-resistant metal such as a stainless steel plate, and on one side thereof, an inlet d is formed along its longitudinal direction for allowing exhaust gas to flow in from each cylinder of the internal combustion engine. An inflow pipe e is provided outside d for communicating with a cylinder head (not shown). Also, on the other side, there is an exhaust pipe f for guiding the exhaust gas in the exhaust chamber c to the exhaust downstream side.
is formed.
そして、排気の高温を維持させるために、断熱
層ｇが排気室ｃを被覆して形成されており、アル
ミナ（Al2O3）維持等により、外方への放熱を遮
断するようになつている。さらに暖熱層ｇを囲繞
して鋳鉄製の外殻ｈが形成されており、流入管ｅ
の外周には、それを覆つて設けられた取付管ｉ
と、取付管ｉを挟んで挿通される取付ボルトｊを
支持するボルト支持部ｋとが設けられており、こ
れらにより各気筒との接続面を形成している。 In order to maintain the high temperature of the exhaust gas, a heat insulating layer g is formed to cover the exhaust chamber c, and by maintaining alumina (Al 2 O 3 ), etc., the heat radiation to the outside is blocked. There is. Furthermore, a cast iron outer shell h is formed surrounding the heating layer g, and an inflow pipe e is formed.
There is a mounting pipe i provided on the outer periphery of the
and a bolt support part k that supports a mounting bolt j inserted through the mounting pipe i are provided, and these form a connection surface with each cylinder.
第７図に示すように、取付ボルトｊは、内殻ｂ
のシリンダヘツド側からその反対側である排出下
流側に形成された貫通孔ｌに挿通されて排気室ｃ
内を横断すると共に、排気マニホールドａをシリ
ンダヘツドに取付けるようになつている。貫通孔
ｌには、取付ボルトｊの挿通を案内する管体ｍが
挿入されており、その端部は内殻ｂに形成された
貫通孔ｌの周縁部ｎに面接続されている。周縁部
ｎは管体ｍの挿入方向へ、即ち貫通孔ｌの外径を
囲むように折り曲げられ、溶接により接合されて
排気室ｃを密閉するようになつている。 As shown in FIG. 7, the mounting bolt j is attached to the inner shell b.
The exhaust chamber C is inserted through a through hole l formed from the cylinder head side of the cylinder head to the exhaust downstream side, which is the opposite side.
The exhaust manifold a is attached to the cylinder head. A tube m for guiding the insertion of a mounting bolt j is inserted into the through hole l, and its end is surface-connected to a peripheral edge n of the through hole l formed in the inner shell b. The peripheral edge part n is bent in the insertion direction of the tube m, that is, so as to surround the outer diameter of the through hole l, and is joined by welding to seal the exhaust chamber c.
［考案が解決しようとする問題点］
ところで、この排気マニホールドａの下流側
に、排気の排気管を閉じる排気ブレーキが設けら
れている場合には、排気室ｃ内の圧力は、排気ブ
レーキ作動時で最高６Kg／cm2に達する。[Problems to be solved by the invention] By the way, if an exhaust brake that closes the exhaust pipe is provided downstream of the exhaust manifold a, the pressure in the exhaust chamber c will be lower than that when the exhaust brake is activated. reaches a maximum of 6Kg/ cm2 .
内殻ｂは、この内圧により断熱層ｇを押しのけ
るように膨脹して、前出第７図中、破線Ａのよう
に変形される。 The inner shell b expands due to this internal pressure so as to push away the heat insulating layer g, and is deformed as indicated by the broken line A in FIG. 7 above.
第８図に示すように、この変形は特に管体ｍの
接合箇所に影響を与える。即ち、管体ｍの外周端
部と貫通孔ｌの周縁部ｎとが剥離されて排気室ｃ
内の排気が漏出するおそれが生ずる。 As shown in FIG. 8, this deformation particularly affects the joints of the tube m. That is, the outer peripheral end of the tube m and the peripheral edge n of the through hole l are separated, and the exhaust chamber c
There is a risk that the exhaust gas inside will leak.
そこで本考案は、上記変形による接合の劣化を
防止して、耐久性のある断熱性排気マニホールド
構造を提供すべく創案されたものである。 Therefore, the present invention was devised to prevent the deterioration of the joint due to the above deformation and to provide a durable heat insulating exhaust manifold structure.
［問題点を解決するための手段］
本考案は、シリンダヘツドに接続されて各気筒
からの排気を集合させて排出するための排気室を
区画する内殻を形成し、該内殻の上記シリンダヘ
ツド側から反対側に取付ボルトを挿通するための
貫通孔を形成し、該貫通孔に管体を挿入すると共
に、該管体の両端部を外方に折り返して内殻に接
合し、上記管体および内殻の外側に、順次断熱
層、外殻を被覆したものである。[Means for Solving the Problems] The present invention forms an inner shell that is connected to a cylinder head and defines an exhaust chamber for collecting and discharging exhaust gas from each cylinder, A through hole for inserting a mounting bolt is formed from the head side to the opposite side, a tube body is inserted into the through hole, and both ends of the tube body are folded back outward and joined to the inner shell. The outside of the body and inner shell are covered with a heat insulating layer and an outer shell.
［作用］
排気室は、各気筒からの排気を集合させて排出
下流側へ導く。管体は取付ボルトを内殻を横断さ
せて挿通させ、シリンダヘツドへの取付けを案内
する。[Operation] The exhaust chamber collects exhaust gas from each cylinder and guides it to the exhaust downstream side. The tube allows the mounting bolt to pass across the inner shell and guides its attachment to the cylinder head.
そして管体の両端部は、内殻の外側に接合して
内殻の接合部分の変形を抑止する。また断熱層
は、高温な排気の熱が外殻へ伝達されるのを遮断
する。 Both ends of the tube are joined to the outside of the inner shell to prevent deformation of the joined portion of the inner shell. The insulation layer also blocks heat from the high-temperature exhaust gas from being transferred to the outer shell.
［実施例］
以下、本考案の実施例を添付図面に従つて説明
する。[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.
第１図および第２図は、本考案に係る排気マニ
ホールド構造の一実施例を示したものであり、排
気マニホールド１は従来と同様に、シリンダヘツ
ドに接続されて各気筒からの排気を集合させて排
出するために、直方体状に形成された内殻２によ
り区画された排気室３と、内殻２の外壁を被覆す
る断熱層４と、さらに断熱層４を被覆する外殻５
とにより形成されている。 Figures 1 and 2 show an embodiment of the exhaust manifold structure according to the present invention, and the exhaust manifold 1 is connected to the cylinder head and collects exhaust gas from each cylinder, as in the conventional case. In order to discharge air, there is an exhaust chamber 3 partitioned by an inner shell 2 formed in the shape of a rectangular parallelepiped, a heat insulating layer 4 covering the outer wall of the inner shell 2, and an outer shell 5 further covering the heat insulating layer 4.
It is formed by
内殻２の一側、即ち、シリンダヘツド側６に
は、流入口７および流入管８が備えられており、
他側、即ち、排気の排出下流側９には排出管１０
が形成されている。また外殻５には流入管８を覆
う取付管１１と、取付ボルト１２を支持するため
のボルト支持部１３とが備えられている。 One side of the inner shell 2, that is, the cylinder head side 6, is provided with an inlet 7 and an inlet pipe 8.
On the other side, that is, on the exhaust downstream side 9, there is a discharge pipe 10.
is formed. Further, the outer shell 5 is provided with a mounting pipe 11 that covers the inflow pipe 8 and a bolt support portion 13 for supporting the mounting bolt 12.
第３図に示すように、ボルト支持部１３の内殻
２には、シリンダヘツド側６から排出下流９へと
貫ぬく貫通孔１４が開口されて形成されており、
貫通孔１４には排気室３内を横断して取付ボルト
１２の挿通を案内するための管体１５が挿入され
ている。 As shown in FIG. 3, a through hole 14 is formed in the inner shell 2 of the bolt support portion 13, and extends from the cylinder head side 6 to the discharge downstream 9.
A tube body 15 is inserted into the through hole 14 for guiding the insertion of the mounting bolt 12 across the interior of the exhaust chamber 3 .
そして本考案の特長となる管体１５と内殻２と
の接合し、管体１５の両端部１６が径方向外方に
折り返されることによりなされている。 The joining of the tubular body 15 and the inner shell 2, which is a feature of the present invention, is achieved by folding both ends 16 of the tubular body 15 radially outward.
第４図に示すように、本実施例にあつては、管
体１５は、内殻２とともにステンレス鋼板によつ
て成形されており、内殻２が外側に変形した時に
あつても容易に剥離しないように、貫通孔１４の
周縁部１７に所定長さだけ重ね合わされて、溶接
により接合されている。 As shown in FIG. 4, in this embodiment, the tube body 15 is formed of a stainless steel plate together with the inner shell 2, and can be easily peeled off even when the inner shell 2 is deformed outward. In order to prevent this from happening, it is overlapped by a predetermined length on the peripheral edge 17 of the through hole 14 and joined by welding.
このように接合されている箇所は、両側６，９
の内殻２の、取付ボルト１２が挿通される位置に
なるが、開口箇所である流入口７を兼ねる位置１
８においては、管体５の端部は折り返されておら
ず、従来と同様に流入管８の端部と同一方向に重
ね合されて接合されている。 The points joined in this way are 6 and 9 on both sides.
This is the position where the mounting bolt 12 is inserted in the inner shell 2, but the position 1 which also serves as the inlet port 7
8, the end of the tubular body 5 is not folded back, but is overlapped and joined in the same direction as the end of the inflow pipe 8, as in the conventional case.
また、管体１５の内壁１９には、内殻２と同様
に、断熱層４と外殻５とが順次被覆されており、
取付ボルト１２は、外殻５と断熱層４とにより囲
繞されて、管体１５内に挿通されることになる。 Further, the inner wall 19 of the tube body 15 is sequentially coated with a heat insulating layer 4 and an outer shell 5, similar to the inner shell 2.
The mounting bolt 12 is surrounded by the outer shell 5 and the heat insulating layer 4, and is inserted into the pipe body 15.
次に本実施例の作用を説明する。 Next, the operation of this embodiment will be explained.
排気室３は、各気筒からの排気を集合させて、
排気流の脈動等のよる圧力変動を抑制する。管体
１５は、内殻２に設けられて貫通孔１４に挿入さ
れ取付ボルト１２を挿通させて、シリンダヘツド
への取付けを案内する。 The exhaust chamber 3 collects exhaust gas from each cylinder,
Suppresses pressure fluctuations caused by exhaust flow pulsation, etc. The tubular body 15 is provided in the inner shell 2 and inserted into the through hole 14, and the mounting bolt 12 is inserted therethrough to guide the mounting to the cylinder head.
排気ブレーキの作動等により、排気室３内の圧
力が高まり、内殻２が外側へ移動するように変形
されると、接合された管体１５と内殻２とが剥離
されるような力が加えられるが、折り返された管
体１５の両端部１６が貫通孔１４の周縁部１７を
外方から支えるように接合しているので、この部
分の変形は抑制されることになる。 When the pressure inside the exhaust chamber 3 increases due to the operation of the exhaust brake, etc., and the inner shell 2 is deformed to move outward, a force that causes the joined pipe body 15 and the inner shell 2 to separate is generated. However, since both ends 16 of the folded tube body 15 are joined to support the peripheral edge 17 of the through hole 14 from the outside, deformation of this portion is suppressed.
なお、本考案の上記変形抑制作用は、ボルトの
熱膨脹を抑えるための断熱層が、その内壁に形成
されない管体を有する排気マニホールドであつて
も、発揮される。 Note that the deformation suppressing effect of the present invention is exerted even in the case of an exhaust manifold having a pipe body in which a heat insulating layer for suppressing thermal expansion of the bolt is not formed on its inner wall.
さらに、本考案者らは、従来および本考案の構
成による内殻に、排気ブレーキ作動時の内圧と同
様の荷重を加えて、鋼板が管体との接合面に発生
する応力を測定してみたが、貫通孔の周縁部に発
生する、溶接を破損させるような応力（引張応
力）は、本考案によつて半分程度に減ぜられると
の結果を得ている。 Furthermore, the present inventors applied a load similar to the internal pressure when the exhaust brake is activated to the inner shells of the conventional and present invention configurations, and measured the stress generated at the interface between the steel plate and the pipe body. However, the present invention has shown that the stress (tensile stress) generated at the peripheral edge of the through-hole that can damage the weld can be reduced to about half.
［考案の効果］
以上要するに本考案によれば、次のような優れ
た効果を発揮する。[Effects of the invention] In summary, the present invention provides the following excellent effects.
従来、管体が、内殻の折り曲げられた貫通孔周
縁部に面接合するようにしていたのを、管体の両
端部を外方に折り返して、内殻の外側に接合する
ようにしたので、内圧による接合箇所の内殻の変
形を抑制して、排気が漏出するおそれのない耐久
性の向上を計つた断熱性の排気マニホールド構造
を得ることができる。 Conventionally, the tube body was face-to-face connected to the bent peripheral edge of the through hole in the inner shell, but now both ends of the tube body are folded back outward and joined to the outside of the inner shell. Therefore, it is possible to obtain a heat-insulating exhaust manifold structure that suppresses deformation of the inner shell at the joint portion due to internal pressure and improves durability without fear of exhaust gas leaking.
第１図は本考案に係る排気マニホールド構造の
一実施例を示した部分破断側面図、第２図はその
上面図、第３図は第２図中の−線断面図、第
４図はその要部拡大図、第５図は従来の排気マニ
ホールド構造を示した部分破断側面図、第６図は
その上面図、第７図は第６図中の−線断面
図、第８図はその要部拡大図である。
図中、１は排気マニホールド、２は内殻、３は
排気室、４は断熱層、５は外殻、１４は貫通孔、
１５は管体、１６はその両端部である。
Fig. 1 is a partially cutaway side view showing one embodiment of the exhaust manifold structure according to the present invention, Fig. 2 is a top view thereof, Fig. 3 is a cross-sectional view taken along the line - - in Fig. 2, and Fig. 4 is its top view. 5 is a partially cutaway side view showing a conventional exhaust manifold structure, FIG. 6 is a top view thereof, FIG. 7 is a sectional view taken along the line - in FIG. 6, and FIG. 8 is a main part thereof. It is an enlarged view of the part. In the figure, 1 is an exhaust manifold, 2 is an inner shell, 3 is an exhaust chamber, 4 is a heat insulation layer, 5 is an outer shell, 14 is a through hole,
15 is a tube body, and 16 is its both ends.
Claims (1)
気を集合させて排出するための排気室を区画す
る内殻を形成し、該内殻の上記シリンダヘツド
側から反対側に取付ボルトを挿通するための貫
通孔を形成し、該貫通孔に管体を挿入すると共
に、該管体の両端部を外方に折り返して内殻に
接合し、上記管体および内殻の外側に、順次断
熱層、外殻を被覆してなることを特徴とする排
気マニホールド構造。 (2) 上記内殻および上記管体がステンレス鋼板に
より成形されて接合された上記実用新案登録請
求の範囲第１項に記載の排気マニホールド構
造。 (3) 上記管体の両端部が径方向外方に折り返され
て、上記内殻に形成される貫通孔の周縁部に所
定長さ重ね合わされて接合された上記実用新案
登録請求の範囲第１項または第２項に記載の排
気マニホールド構造。[Scope of Claim for Utility Model Registration] (1) Forms an inner shell that is connected to a cylinder head and defines an exhaust chamber for collecting and discharging exhaust gas from each cylinder, and from the cylinder head side of the inner shell. A through hole for inserting a mounting bolt is formed on the opposite side, a tube is inserted into the through hole, and both ends of the tube are folded back outward and joined to the inner shell, and the tube and the inner The exhaust manifold structure is characterized by sequentially covering the outside of the shell with a heat insulating layer and an outer shell. (2) The exhaust manifold structure according to claim 1, wherein the inner shell and the tube body are molded from stainless steel plates and joined together. (3) Claim 1 of the above-mentioned utility model registration, in which both ends of the tube body are folded back radially outward and overlapped and joined by a predetermined length to the peripheral edge of the through-hole formed in the inner shell. The exhaust manifold structure according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6888987U JPH0541223Y2 (en) | 1987-05-11 | 1987-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6888987U JPH0541223Y2 (en) | 1987-05-11 | 1987-05-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63183319U JPS63183319U (en) | 1988-11-25 |
| JPH0541223Y2 true JPH0541223Y2 (en) | 1993-10-19 |
Family
ID=30909122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6888987U Expired - Lifetime JPH0541223Y2 (en) | 1987-05-11 | 1987-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0541223Y2 (en) |
-
1987
- 1987-05-11 JP JP6888987U patent/JPH0541223Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63183319U (en) | 1988-11-25 |
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