JPS6335802B2 - - Google Patents
Info
- Publication number
- JPS6335802B2 JPS6335802B2 JP2889081A JP2889081A JPS6335802B2 JP S6335802 B2 JPS6335802 B2 JP S6335802B2 JP 2889081 A JP2889081 A JP 2889081A JP 2889081 A JP2889081 A JP 2889081A JP S6335802 B2 JPS6335802 B2 JP S6335802B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical case
- cover
- cylindrical
- annular space
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
- F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
- F01N3/2867—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being placed at the front or end face of catalyst body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
- F01N2350/02—Fitting ceramic monoliths in a metallic housing
- F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Description
【発明の詳細な説明】
本発明は、結合構造に係わり、更に詳細には加
熱を受ける筒状ケースと該筒状ケースの端部に取
付けられるカバーとの結合構造に係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupling structure, and more particularly to a coupling structure between a cylindrical case to be heated and a cover attached to an end of the cylindrical case.
たとえば、エンジン排気系に組込まれる排気ガ
ス浄化用モノリス触媒コンバータは、一般にモノ
リス触媒を収納する筒状ケースと、前記筒状ケー
スの端部に取付けられるカバー（エンドキヤツ
プ）とを含んでいる。上述の如き筒状ケースとカ
バーとの気密結合は、その両者の接合端を突合わ
せ、該接合端の各々に設けられた環状フランジを
ガスケツトを挾んで接合し、これらを貫通するボ
ルトとナツトにより前記両者を互に締結すること
により行なわれている。 For example, a monolithic catalytic converter for exhaust gas purification that is incorporated into an engine exhaust system generally includes a cylindrical case that houses a monolithic catalyst, and a cover (end cap) that is attached to the end of the cylindrical case. The above-mentioned airtight connection between the cylindrical case and the cover is achieved by butting the joining ends of the two together, joining the annular flanges provided at each of the joining ends with a gasket in between, and using bolts and nuts passing through them. This is done by fastening the two together.
上述の如き結合構造に於ては、環状フランジの
環状面部にてシールを行なうため十分なシール効
果を得るためには所要のシール面積を得るべく環
状フランジは比較的大きい径にされなければなら
ず、またこの環状フランジの熱変形を避けるべく
該環状フランジは比較的厚いものになり、この環
状フランジがモノリス触媒コンバータの重量を増
大し、自動車搭載部品の軽量化の超勢に反する。
また、環状フランジによりモノリス触媒コンバー
タの熱容量が増大し、モノリス触媒コンバータの
暖機性が悪化するようになる。 In the above-mentioned coupling structure, since sealing is performed at the annular surface of the annular flange, in order to obtain a sufficient sealing effect, the annular flange must have a relatively large diameter in order to obtain the required sealing area. Moreover, in order to avoid thermal deformation of the annular flange, the annular flange is made relatively thick, which increases the weight of the monolithic catalytic converter, which goes against the trend of reducing the weight of automotive components.
Further, the annular flange increases the heat capacity of the monolith catalytic converter, and the warm-up performance of the monolith catalytic converter deteriorates.
本発明は上述の如き不具合に鑑みて重量ならび
に熱容量をさほど増大することなく、しかも確実
な気密結合を行なう新しい結合構造を提供するこ
とを目的としている。 SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a new joint structure that does not significantly increase the weight or heat capacity and yet provides a reliable airtight joint.
かかる目的は、本発明によれば、加熱を受ける
筒状ケースと該筒状ケースの端部に取付けられる
カバーとの結合構造にして、前記筒状ケースと前
記カバーとは互の接合端部にて入筒式に遊嵌合し
て該両者間に環状空間を構成し、該環状空間に熱
発泡性セラミツクフアイバが充填発泡されている
ことを特徴とする結合構造によつて達成される。 According to the present invention, such an object is achieved by providing a joint structure of a cylindrical case to be heated and a cover attached to an end of the cylindrical case, wherein the cylindrical case and the cover are attached to the joint ends of each other. This is achieved by a coupling structure characterized in that the two are loosely fitted in a cylindrical manner to form an annular space between them, and the annular space is filled and foamed with thermally foamable ceramic fibers.
以下に添付の図を参照して本発明を実施例につ
いて詳細に説明する。 The invention will now be described in detail by way of example embodiments with reference to the accompanying drawings.
第１図は本発明による結合構造が実施されたモ
ノリス触媒コンバータの一つの実施例を一部切欠
いて示す立面図、第２図及び第３図は各々第１図
の線―及び―に沿う拡大断面図である。
図に於て、１はモノリス触媒コンバータの円筒ケ
ースを示している。この円筒ケース１はその一端
にエンドキヤツプ部２を一体に有しており、また
該端部にガス出口３を有している。円筒ケース１
内には円柱状のモノリス触媒４が収納されてい
る。円筒ケース１の他端はモノリス触媒４の出入
が行なわれるよう開口しており、この開口端部に
はカバー５が取付けられている。カバー５はこの
実施例に於ては排気マニホールド６の一端部に一
体に成形されており、また該排気マニホールド６
はその他端にてエンジンのシリンダヘツド７に固
定的に接続されている。 FIG. 1 is an elevational view, partially cut away, of an embodiment of a monolithic catalytic converter in which a coupling structure according to the invention is implemented; FIGS. 2 and 3 are taken along the lines - and - of FIG. 1, respectively. It is an enlarged sectional view.
In the figure, 1 indicates a cylindrical case of a monolithic catalytic converter. This cylindrical case 1 integrally has an end cap portion 2 at one end thereof, and also has a gas outlet 3 at the end. Cylindrical case 1
A cylindrical monolithic catalyst 4 is housed inside. The other end of the cylindrical case 1 is open so that the monolithic catalyst 4 can be taken in and out, and a cover 5 is attached to this open end. In this embodiment, the cover 5 is integrally molded with one end of the exhaust manifold 6, and the cover 5 is integrally formed with one end of the exhaust manifold 6.
is fixedly connected at its other end to the cylinder head 7 of the engine.
カバー５はその接合端部に円筒ケース１の外周
部に入筒式に遊嵌合する円筒部８を有しており、
該円筒部８と円筒ケース１の外周部との間に円環
状空間９を構成している。カバー５の円筒ケース
１に対する入筒嵌合は該円筒部の先端が円筒ケー
ス１の外周に形成されたフランジ状のストツパ１
０に当接することにより規制されている。円環状
空間９には熱発泡性セラミツクフアイバ１１が充
填発泡され、これにより円筒ケース１とカバー５
とが気密に接続されている。熱発泡性セラミツク
フアイバ１１はひる石を含むものであり、住友ス
リーエム株式会社が発売している商品名「インタ
ーラム」であつて良い。この熱発泡性セラミツク
フアイバ１１は加熱されることにより発泡して体
積膨張し、一度発泡により体積膨張すると温度が
低下しても収縮せず良好な安定したシール作用を
行なうものである。 The cover 5 has a cylindrical portion 8 at its joint end that loosely fits into the outer circumference of the cylindrical case 1 in a cylindrical manner,
An annular space 9 is formed between the cylindrical portion 8 and the outer peripheral portion of the cylindrical case 1. The cover 5 is fitted into the cylindrical case 1 through a flange-like stopper 1 whose tip end is formed on the outer periphery of the cylindrical case 1.
It is regulated by contacting zero. The annular space 9 is filled with heat-foamable ceramic fibers 11 and foamed, thereby connecting the cylindrical case 1 and the cover 5.
are airtightly connected. The heat-foamable ceramic fiber 11 contains vermiculite, and may be the product name "Interum" sold by Sumitomo 3M Limited. The heat-foamable ceramic fiber 11 foams and expands in volume when heated, and once expanded in volume due to foaming, it does not shrink even when the temperature drops, providing a good and stable sealing effect.
円筒ケース１とカバー５との結合は、まず未発
泡の板体状をなす熱発泡性セラミツクフアイバ１
１を円筒ケース１の結合端部の外周部に巻付け、
この外周部にカバー５の円筒部８を嵌合し、その
後ボルト１２によつて円筒ケース１とカバー５と
を締結することにより行なわれる。熱発泡性セラ
ミツクフアイバ１１は使用中、モノリス触媒コン
バータ内を通過する排気ガスの熱によつて円環状
空間１１を埋めるように発泡し、円筒ケース１と
カバー５との間の気密シールを行なう。 The cylindrical case 1 and the cover 5 are joined together by first using a heat-foamable ceramic fiber 1 in the form of an unfoamed plate.
1 around the outer periphery of the joint end of the cylindrical case 1,
This is done by fitting the cylindrical portion 8 of the cover 5 to this outer peripheral portion, and then fastening the cylindrical case 1 and the cover 5 with bolts 12. During use, the thermally foamable ceramic fiber 11 foams to fill the annular space 11 due to the heat of the exhaust gas passing through the monolithic catalytic converter, thereby creating an airtight seal between the cylindrical case 1 and the cover 5.
ボルト１２はモノリス触媒コンバータがエンジ
ンにより加振されても熱発泡性セラミツクフアイ
バ１１と円筒ケース１及びカバー５との間で相対
運動が生じないよう、円筒ケース１とカバー５と
を締結する程度の締結力を有する比較的小さいも
のであつて良く、これがストツパ１０や円筒部８
の肉厚をさほど大きくすることはない。 The bolts 12 are designed to fasten the cylindrical case 1 and the cover 5 to prevent relative movement between the thermally foamable ceramic fiber 11 and the cylindrical case 1 and the cover 5 even when the monolithic catalytic converter is vibrated by the engine. It may be a relatively small piece that has a fastening force, and this is used for the stopper 10 and the cylindrical part 8.
It is not necessary to increase the thickness of the wall very much.
モノリス触媒４の交換等に際して円筒ケース１
よりカバー５を取外す場合はボルト１２を弛め、
発泡している熱発泡性セラミツクフアイバ１１を
破壊しながらカバー５の円筒部８を円筒ケース１
より抜出せば良い。この時、円筒ケース１とカバ
ー５の円筒部８が熱変形を生じていても、その両
者は遊嵌合するよう構成され、その間の空間が熱
発泡性セラミツクフアイバによつて埋められてシ
ールされるようになつているから、熱発泡性セラ
ミツクフアイバを交換するのみで円筒ケース１及
びカバー５を再使用することができる。 When replacing the monolithic catalyst 4, etc., remove the cylindrical case 1.
When removing the cover 5, loosen the bolt 12,
The cylindrical part 8 of the cover 5 is inserted into the cylindrical case 1 while destroying the foaming thermofoamable ceramic fiber 11.
It would be better to extract more. At this time, even if the cylindrical case 1 and the cylindrical portion 8 of the cover 5 are thermally deformed, they are configured to loosely fit together, and the space between them is filled and sealed by the heat-foamable ceramic fiber. Therefore, the cylindrical case 1 and cover 5 can be reused by simply replacing the heat-foamable ceramic fibers.
尚、モノリス触媒４は円筒ケース１の一端部に
設けられた円環状端壁１３とカバー５に形成され
た円環状端壁１４との間にスペーサ１５，１６等
を挾んでその間に固定的に支持され、またこれと
円筒ケース１との間に設けられる円環状空間には
ワイヤネツト１７が充填されている。 The monolithic catalyst 4 is fixedly mounted between an annular end wall 13 provided at one end of the cylindrical case 1 and an annular end wall 14 formed on the cover 5 by sandwiching spacers 15, 16, etc. therebetween. The annular space provided between the cylindrical case 1 and the cylindrical case 1 is filled with a wire net 17.
以上に於ては、本発明を特定の実施例について
詳細に説明したが、本発明は上述の実施例に限ら
れるものではなく、本発明の範囲内にて他の種々
の実施例が可能であることは当業者にとつて明ら
かであろう。 Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited to the above-mentioned embodiments, and various other embodiments are possible within the scope of the present invention. This will be obvious to those skilled in the art.
第１図は本発明による結合構造が用いられたモ
ノリス触媒コンバータの一つの実施例を一部切欠
いて示す立面図、第２図及び第３図は各々第１図
の線―及び―に沿う拡大断面図である。
１〜円筒ケース、２〜エンドキヤツプ部、３〜
ガス出口、４〜モノリス触媒、５〜カバー、６〜
排気マニホールド、７〜シリンダヘツド、８〜円
筒部、９〜円環状空間、１０〜ストツパ、１１〜
熱発泡性セラミツクフアイバ、１２〜ボルト、１
３，１４〜円環状端壁、１５，１６〜スペーサ、
１７〜ワイヤネツト。
FIG. 1 is an elevational view, partially cut away, of one embodiment of a monolithic catalytic converter in which a coupling structure according to the invention is used; FIGS. 2 and 3 are taken along the lines - and - of FIG. 1, respectively. It is an enlarged sectional view. 1~Cylindrical case, 2~End cap part, 3~
Gas outlet, 4~monolith catalyst, 5~cover, 6~
Exhaust manifold, 7 - cylinder head, 8 - cylindrical part, 9 - annular space, 10 - stopper, 11 -
Heat foamable ceramic fiber, 12~volts, 1
3, 14 - annular end wall, 15, 16 - spacer,
17~Wire net.
Claims (1)
部に取付けられるカバーとの結合構造にして、前
記筒状ケースと前記カバーとは互の接合端部にて
入筒式に遊嵌合して該両者間に環状空間を構成
し、該環状空間に熱発泡性セラミツクフアイバが
充填発泡されていることを特徴とする結合構造。1. A coupling structure of a cylindrical case to be heated and a cover attached to an end of the cylindrical case, wherein the cylindrical case and the cover are loosely fitted in a cylindrical manner at their joint ends. and forming an annular space between the two, the annular space being filled and foamed with thermally foamable ceramic fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2889081A JPS57143118A (en) | 1981-02-27 | 1981-02-27 | Conjoining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2889081A JPS57143118A (en) | 1981-02-27 | 1981-02-27 | Conjoining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143118A JPS57143118A (en) | 1982-09-04 |
| JPS6335802B2 true JPS6335802B2 (en) | 1988-07-18 |
Family
ID=12260985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2889081A Granted JPS57143118A (en) | 1981-02-27 | 1981-02-27 | Conjoining device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143118A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4995659B2 (en) * | 2007-07-26 | 2012-08-08 | 日野自動車株式会社 | Exhaust purification device |
-
1981
- 1981-02-27 JP JP2889081A patent/JPS57143118A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143118A (en) | 1982-09-04 |
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