JPH07189678A - Mounting method for exhaust emission control converter heat insulating seal member for automobile - Google Patents

Mounting method for exhaust emission control converter heat insulating seal member for automobile

Info

Publication number
JPH07189678A
JPH07189678A JP5347739A JP34773993A JPH07189678A JP H07189678 A JPH07189678 A JP H07189678A JP 5347739 A JP5347739 A JP 5347739A JP 34773993 A JP34773993 A JP 34773993A JP H07189678 A JPH07189678 A JP H07189678A
Authority
JP
Japan
Prior art keywords
ceramic fiber
shell
exhaust gas
catalyst holder
converter
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
Application number
JP5347739A
Other languages
Japanese (ja)
Other versions
JP3370410B2 (en
Inventor
Keiichi Sakashita
敬一 阪下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ibiden Co Ltd
Original Assignee
Ibiden Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ibiden Co Ltd filed Critical Ibiden Co Ltd
Priority to JP34773993A priority Critical patent/JP3370410B2/en
Publication of JPH07189678A publication Critical patent/JPH07189678A/en
Application granted granted Critical
Publication of JP3370410B2 publication Critical patent/JP3370410B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2839Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853Arrangements 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/28Construction of catalytic reactors
    • F01N3/2839Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853Arrangements 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
    • F01N3/2864Arrangements 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 comprising two or more insulation layers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2350/00Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02Fitting ceramic monoliths in a metallic housing
    • F01N2350/06Fitting ceramic monoliths in a metallic housing with means preventing gas flow by-pass or leakage
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

PURPOSE:To mount a seal layer at a low cost without any causing damage by arranging plate/cylindrical ceramic fiber on the outer circumference of a catalyst holding body, inserting them into an air tight sheet, and depressurizing the inside so as to reduce bulk density and thickness to the specified value. CONSTITUTION:A converter 1 consists of a catalyst holding body 4, a shell 2 covering the outside of the catalyst holding body 4, and a ceramic fiber layer 31 arranged between the catalyst holding body 4 and the shell 2, and the fiber layer 31 and the catalyst holding body 4 are coated by an air tight sheet 32. In assembly of the converter 1 in this way, the inside of the air tight sheet 32 is depressurized after the ceramic fiber 31 is arranged on the outer circumference of the catalyst holding body 4, so that the bulk density of the ceramic fiber 31 is set to 0.10-0.40g/cm<3>, while the thickness of the ceramic fiber 31 is set to be 1.0-2.5 times as thick as the thickness of a clearance between the catalyst holding body 4 and the shell 2 after assembly, and then, the air tight sheet 32 is sealed, and subsequently, assembly is finished by attaching the shell 2 from the outside.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、排気ガス浄化用コンバ
ーター及びその製造方法、特に触媒保持体周囲とシェル
との間のシール材の組付に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying converter and a method for manufacturing the same, and more particularly to assembling a sealing material between the periphery of a catalyst holder and a shell.

【0002】[0002]

【従来の技術】従来、図4に示すごとく、主として車両
に搭載する排気ガス浄化用コンバーター9においては、
触媒保持体94と該触媒保持体94の外方を覆う金属製
のシェル92と、両者の間に配置した緩衝シール材93
とよりなる。上記触媒保持体94には白金等の触媒が担
持されている。触媒保持体94としては、例えばその断
面をハニカム状に成形したコージェライト担体を用い
る。なお、図4において、符号910は排気パイプ95
取付用のフランジである。
2. Description of the Related Art Conventionally, as shown in FIG. 4, in an exhaust gas purifying converter 9 mainly mounted in a vehicle,
A catalyst holder 94, a metal shell 92 covering the outside of the catalyst holder 94, and a cushioning sealant 93 arranged between the two.
And consists of. The catalyst holder 94 carries a catalyst such as platinum. As the catalyst holder 94, for example, a cordierite carrier having a honeycomb cross section is used. In FIG. 4, reference numeral 910 is the exhaust pipe 95.
It is a mounting flange.

【0003】次に、上記緩衝シール材93は、図5に示
すごとく、金属ネット931により外周部分を補強した
無機シート932を用いる。無機シート932はバーミ
キュライトとセラミックファイバーとの混合物をシート
状に成形したものである。上記緩衝シール材93は、自
動車の走行中等において触媒保持体94が外周の金属製
のシェルと当接した際の損傷を防ぎ、また、シェル92
と触媒保持体94との間から排気ガスがリークすること
を防ぐために用いられている。また、近年金属ネット9
31を用いる事なく、無機シート932のみを用いたコ
ンバータも用いられている。
Next, as the cushioning sealing material 93, as shown in FIG. 5, an inorganic sheet 932 having an outer peripheral portion reinforced by a metal net 931 is used. The inorganic sheet 932 is formed by molding a mixture of vermiculite and ceramic fibers into a sheet. The cushioning sealing material 93 prevents damage when the catalyst holder 94 comes into contact with the metal shell on the outer periphery while the vehicle is running, etc.
It is used to prevent the exhaust gas from leaking from between the catalyst holder 94 and the catalyst holder 94. In addition, in recent years metal net 9
A converter using only the inorganic sheet 932 without using 31 is also used.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記緩
衝シール材93に使用されているバーミキュライトは、
排気ガスの高い温度において、その内部に含まれている
水分が徐々に蒸発していく。そのため、緩衝シール材は
長期間の使用中に、膨張圧力が低下してしまう。このた
め、シェル92と触媒保持体94との間に隙間ができ、
緩衝性及びシール性が低下してしまう。特に、バーミキ
ュライトは、850℃を越えると、上記の水分蒸発が著
しい。更に、近年燃費向上の為に普及しつつあるリーン
バーンエンジンにおいては、排気ガス温度が950℃を
越えることがある。このため、一層、バーミキュライト
の膨張圧力の低下が問題になる。
However, the vermiculite used in the buffer sealing material 93 is
At high temperature of the exhaust gas, the water contained therein gradually evaporates. Therefore, the expansion pressure of the cushioning sealant is lowered during long-term use. Therefore, a gap is formed between the shell 92 and the catalyst holder 94,
The cushioning property and the sealing property are deteriorated. Especially, in the case of vermiculite, when the temperature exceeds 850 ° C., the above water evaporation is remarkable. Further, in a lean burn engine which has been widely used for improving fuel efficiency in recent years, the exhaust gas temperature may exceed 950 ° C. Therefore, the decrease in the expansion pressure of vermiculite becomes a problem.

【0005】そこで、耐熱性に優れ、かつ膨張圧力の低
下のないセラミックファイバー層による緩衝シール材を
使用することが考えられる。この場合には、図6に示す
ごとく、セラミックファイバー層96により触媒保持体
94の周囲を布団のようにして覆い、これらを上シェル
921と下シェル922との間に埋没させようとするも
のである。しかし、セラミックファイバーは大変脆い物
質である。このため、図7に示すごとく、上シェル92
1及び下シェル922と触媒保持体94との間にセラミ
ックファイバー層96を組入れる際に、強い力を加えた
り、擦ったりすると、容易に粉体化してしまう。特に上
記のごとく、触媒保持体94の周囲をセラミックファイ
バー層96で覆ったものを、下シェル922と上シェル
921との間に無理に入れようとすると、両シェルの角
部920とセラミックファイバー層の当接部分961に
おいて著しい摩擦や押圧力が働き、その当接部分961
におけるセラミックファイバー層が崩れてしまい、緩衝
シール材としての役目を果たさなくなってしまう。
Therefore, it is conceivable to use a buffer seal material having a ceramic fiber layer which is excellent in heat resistance and does not lower the expansion pressure. In this case, as shown in FIG. 6, the periphery of the catalyst holder 94 is covered with a ceramic fiber layer 96 like a futon to bury them between the upper shell 921 and the lower shell 922. is there. However, ceramic fibers are very brittle materials. Therefore, as shown in FIG.
When the ceramic fiber layer 96 is assembled between the first and lower shells 922 and the catalyst support 94, if a strong force is applied or a rubbing is performed, the powder is easily pulverized. In particular, as described above, if the catalyst holder 94 covered with the ceramic fiber layer 96 is forcibly inserted between the lower shell 922 and the upper shell 921, the corner portions 920 of both shells and the ceramic fiber layer At the contact portion 961 of the
Therefore, the ceramic fiber layer in the above-mentioned collapses and cannot serve as a cushioning sealant.

【0006】そこで、従来のバーミキュライトを用いた
シール材((商品名:インタラムマット(3M社製)、
イビウールフレックス(イビデン社製))に於いては、
セラミックファイバーとバーミキュライトに、エマルジ
ョンラテックス等のバインダーを添加し湿式抄造成形
し、更に加圧プレス、乾燥といった複雑な工程をとり、
セットするときの厚みを薄くし、排気ガスコンバーター
に取り付け易いようにしていたが、前記耐熱性の問題の
みでなく、複雑な工程をとる為、製造コストが高いとい
う欠点があった。
Therefore, a conventional sealing material using vermiculite ((trade name: Interram Mat (manufactured by 3M),
In Ibi wool flex (made by Ibiden),
A binder such as emulsion latex is added to ceramic fiber and vermiculite to perform wet papermaking and molding, and a complicated process such as pressure pressing and drying is taken.
Although the thickness at the time of setting is thin so that it can be easily attached to the exhaust gas converter, there is a drawback that not only the heat resistance problem but also complicated manufacturing steps cause high manufacturing cost.

【0007】本発明は、かかる問題点に鑑み、シール層
が高温で劣化することなく、かつシール層を損傷させる
ことなく低コストで組付けることができる、排気ガス浄
化用コンバーター断熱シール材の取り付け方法を提供し
ようとするものである。
In view of the above problems, the present invention provides an exhaust gas purifying converter heat insulating seal member which can be assembled at a low cost without deterioration of the seal layer at high temperature and without damaging the seal layer. It is intended to provide a method.

【0008】[0008]

【課題を解決するための手段】本発明は、触媒保持体と
該触媒保持体の外方を覆うシェルと、両者の間に配置し
たセラミックファイバー層よりなる、自動車用排気ガス
浄化用コンバーター断熱シール材の取り付け方法に於い
て、板状または円筒状のセラミックファイバーを前記触
媒保持体の外周部に配置した後、気密シートの中に入
れ、内部を減圧する事により、該セラミックファイバー
の嵩密度を0.10〜0.40g/cm3 とするととも
に、該セラミックファイバーの厚みを前記触媒保持体と
前記シェルの組みたて後のクリアランスの1.0〜2.
5倍の厚みまで減少させたのち前記気密シートを密閉
し、その後、その外側からシェルをあてがい、加圧組付
けすることを特徴とする自動車用排気ガス浄化用コンバ
ーター断熱シール材の取り付け方法にある。さらに、前
記気密シートは、ポリ塩化ビニール、ポリエチレンアイ
オノマー樹脂等の有機合成シートよりなることを特徴と
する自動車用排気ガス浄化用コンバーター断熱シール材
の取り付け方法にある。
DISCLOSURE OF THE INVENTION The present invention is directed to an automobile exhaust gas purifying converter heat insulating seal comprising a catalyst holder, a shell covering the outside of the catalyst holder, and a ceramic fiber layer arranged between the two. In the method of attaching the material, after arranging the plate-shaped or cylindrical ceramic fibers on the outer peripheral portion of the catalyst holder, the ceramic fibers are put in an airtight sheet and the internal pressure is reduced to reduce the bulk density of the ceramic fibers. 0.10 to 0.40 g / cm 3, and the thickness of the ceramic fiber is 1.0 to 2 of the clearance after the catalyst holder and the shell are assembled.
A method for mounting a heat insulating sealing material for an automobile exhaust gas purifying, characterized in that after reducing the thickness to 5 times, the airtight sheet is hermetically sealed, and then a shell is applied from the outside of the airtight sheet and pressure is assembled. . Further, the airtight sheet is made of an organic synthetic sheet of polyvinyl chloride, polyethylene ionomer resin or the like.

【0009】まず、上記触媒保持体としては、例えばハ
ニカム状のものを用いる。また、上記触媒保持体は、例
えばコージェライト、アルミナまたはクロム系ステンレ
ス等により作成する。また、上記シェルは、例えば断面
が長円形、円形の筒である。また、上記シェルは、例え
ば金属製である。また、上記気密シートは、上記セラミ
ックファイバー層を触媒保持体と同時に被覆しているも
のであり、後述のごとく、セラミックファイバー層をシ
ェルの間に容易に埋没するため、あるいはセラミックフ
ァイバー層を触媒保持体に容易に巻き付けるために用い
られたものである。また、上記構造のコンバーターは、
自動車製造工場において排気ガスパイプに接続される。
そして、試運転の際には高温度の排気ガスによって、上
記気密シートは焼却されてしまう。或いは、上記気密シ
ートはコンバーターを排気ガスパイプに接続する前に焼
却しても良い。
First, for example, a honeycomb-shaped member is used as the catalyst holder. The catalyst holder is made of cordierite, alumina, chromium-based stainless steel, or the like. In addition, the shell is, for example, a cylinder having an oval or circular cross section. The shell is made of metal, for example. Further, the airtight sheet covers the ceramic fiber layer at the same time as the catalyst holder, and as described later, the ceramic fiber layer is easily embedded between the shells or the ceramic fiber layer holds the catalyst. It was used for easy wrapping around the body. Also, the converter with the above structure
Connected to an exhaust gas pipe in a car manufacturing plant.
Then, at the time of test operation, the airtight sheet is incinerated due to the high temperature exhaust gas. Alternatively, the airtight sheet may be incinerated before connecting the converter to the exhaust gas pipe.

【0010】次に、上記、自動車排気ガス浄化用コンバ
ーター断熱シール材の取り付け方法は、板状または円筒
形状のセラミックファイバーを触媒保持体の外周部に配
置した後、気密シートよりなる袋の中に入れ、内部を減
圧し、気密シートの開口部をホットメルトや接着剤等に
より貼り合わせ、完全密閉する。あるいは、上記気密シ
ートに熱融着フィルムを用い、上下から挟み、次いで内
部を減圧しながら該熱融着フィルムの周囲をホットメル
トにより貼り合わせ、完全密閉し、ファイバーシール体
となす。これにより上記ファイバーシール体の厚みが減
少する。
Next, in the method of mounting the converter heat insulating seal material for automobile exhaust gas purification described above, after arranging the plate-shaped or cylindrical ceramic fiber on the outer peripheral portion of the catalyst holding body, it is placed in a bag made of an airtight sheet. Then, the inside of the airtight sheet is depressurized, the opening of the airtight sheet is pasted with hot melt or an adhesive agent, and the sheet is completely sealed. Alternatively, a heat-sealing film is used for the airtight sheet, sandwiched from above and below, and then the periphery of the heat-sealing film is bonded by hot melt while depressurizing the inside, and completely sealed to form a fiber seal body. This reduces the thickness of the fiber seal body.

【0011】前記ファイバーシール体中のセラミックフ
ァイバー厚みは、触媒保持体とシェルとのクリアランス
の1.0〜2.5倍の厚さにしなけれはならない。上記
厚みが上記クリアランスの1倍未満、即ち薄いと、コン
バーター組立後の取り扱い、輸送時に、触媒保持体の位
置がずれてしまったり、セラミック製の触媒保持体の場
合、まれには、破損してしまう為である。また、2.5
倍を越える厚さの場合は前述した如く、組立ての作業性
が極めて悪くなるばかりか、セラミックファイバー層が
崩れてしまうからである。
The thickness of the ceramic fibers in the fiber seal body must be 1.0 to 2.5 times the clearance between the catalyst holder and the shell. If the thickness is less than 1 time the clearance, that is, if the thickness is thin, the position of the catalyst holder may be displaced during handling or transportation after the converter is assembled, or in the case of a ceramic catalyst holder, it may be damaged in rare cases. This is because it ends up. Also, 2.5
This is because when the thickness exceeds twice, not only the workability of assembling becomes extremely poor but also the ceramic fiber layer collapses as described above.

【0012】また、この減圧密閉時のセラミックファイ
バーの嵩密度は、0.10〜0.40g/cm3 の範囲
でなければならない。嵩密度が小さすぎると、セラミッ
クファイバーの復元力が弱く、自動車のエンジン振動ま
たは走行振動により、触媒保持体が踊り、セラミックフ
ァイバー層が粉化したり、摩滅するばかりでなく、排気
ガスが、セラミックファイバー層を貫通してしまうから
である。逆に、嵩密度が大きすぎると、後工程である加
圧組立時の圧力でセラミックファイバー自体が圧壊した
り、触媒保持体が、破損、変形してしまうからである。
Further, the bulk density of the ceramic fiber when sealed under reduced pressure must be in the range of 0.10 to 0.40 g / cm 3 . If the bulk density is too small, the restoring force of the ceramic fiber is weak, and the catalyst carrier dances due to the engine vibration or running vibration of the car, and the ceramic fiber layer is not only powdered or abraded, but also the exhaust gas is This is because it penetrates the layers. On the contrary, if the bulk density is too large, the ceramic fiber itself will be crushed by the pressure at the time of pressurizing and assembling in the subsequent step, or the catalyst holder will be damaged or deformed.

【0013】次に、上記ファイバーシール体に上シェル
と下シェルを当て、上下より加圧して、上シェルと下シ
ェルを密着させ、シェルの外周部をクリンチ加工した
り、ボルト・ナットにて固定する。
Next, the upper shell and the lower shell are applied to the above-mentioned fiber seal body, and pressure is applied from above and below to bring the upper shell and the lower shell into close contact, and the outer peripheral portion of the shell is clinched or fixed with bolts and nuts. To do.

【0014】次に、前記のごとく、上記気密シートは上
記排気ガス浄化用コンバーターの製作終了後に加熱焼却
することもできる。また、排気ガス浄化用コンバーター
が車両等へ組付けられた際においても、上記気密シート
の一部または全部が残留していても構わない。
Next, as described above, the airtight sheet may be heated and incinerated after the production of the exhaust gas purifying converter is completed. Further, even when the converter for purifying exhaust gas is assembled to a vehicle or the like, part or all of the airtight sheet may remain.

【0015】上記セラミックファイバー層はアルミナ繊
維、シリカ−アルミナ繊維、シリカ繊維の不織布から選
ばれる材料によりなることが好ましい。これらはいずれ
も耐熱性に優れた物質である。さらに、上記セラミック
ファイバーは材料コストを考慮して、高温となる触媒保
持体側に高価ではあるがより耐熱性に優れたアルミナ繊
維を配し、その外側の低温側に若干耐熱性に劣るが安価
なシリカ−アルミナ繊維を配する等の2層構造とするこ
とができる。
The ceramic fiber layer is preferably made of a material selected from alumina fibers, silica-alumina fibers, and silica fiber non-woven fabric. All of these are substances having excellent heat resistance. Further, in consideration of the material cost, the above ceramic fiber is provided with alumina fiber which is expensive but more excellent in heat resistance on the side of the catalyst support which becomes high temperature, and is slightly inferior in heat resistance but is inexpensive on the low temperature side outside thereof. It is possible to have a two-layer structure in which silica-alumina fibers are arranged.

【0016】また、上記気密シートは、シリコン樹脂、
ポリ塩化ビニル、ポリエチレン、アイオノマー樹脂等の
有機合成シートを用いる。特に、シェル内へのファイバ
ーシール体の組付けが更に容易に行われるためには、気
密シートの表面が良好な潤滑性を有することが好まし
い。即ち、上記気密シートは、表面の摩擦係数の低い材
料を用いることが好ましい。かかる点より、上記の気密
シートの材料の中でポリ塩化ビニル、ポリエチレン、ア
イオノマー樹脂が最も好ましい。また、上記気密シート
の外面に潤滑油等をコーティングし、潤滑性を増加させ
る事も効果的である。
The airtight sheet is made of silicone resin,
An organic synthetic sheet such as polyvinyl chloride, polyethylene, or ionomer resin is used. In particular, in order to more easily assemble the fiber seal body in the shell, it is preferable that the surface of the airtight sheet has good lubricity. That is, the airtight sheet is preferably made of a material having a low surface friction coefficient. From this point of view, polyvinyl chloride, polyethylene and ionomer resins are most preferable among the above materials for the airtight sheet. It is also effective to coat the outer surface of the airtight sheet with lubricating oil or the like to increase the lubricity.

【0017】[0017]

【作用及び効果】本発明の製造方法による排気ガス浄化
用コンバーターにおいては、触媒保持体とシェルとの間
にシール層としてセラミックファイバー層が設けられ
る。上記セラミックファイバー層は耐熱性に優れてい
る。このため、このセラミックファイバー層は、排気ガ
ス、特に高温のリーンバーン排気ガスに曝されても、従
来のバーミキュライト製の緩衝シール材のように膨張圧
力の低下による変形、品質の劣化を起こすことがない。
In the converter for purifying exhaust gas according to the manufacturing method of the present invention, the ceramic fiber layer is provided as the seal layer between the catalyst holder and the shell. The ceramic fiber layer has excellent heat resistance. Therefore, even if the ceramic fiber layer is exposed to exhaust gas, especially high-temperature lean burn exhaust gas, it may be deformed due to a decrease in expansion pressure and deteriorate in quality like a conventional buffer seal material made of vermiculite. Absent.

【0018】本発明の製造方法にあっては、上記排気ガ
ス浄化用コンバーターにおける上記セラミックファイバ
ーは、気密シートで被覆され、気密シート内部が減圧さ
れた状態にある。そのため、上記セラミックファイバー
はその厚みが減少し、シェルと触媒保持体との間の間隔
と同等乃至それより150%大きい厚みとなる。それ
故、上記セラミックファイバー層は複雑な工程を必要と
することなく、しかも確実容易にシェルと触媒保持体と
の間に組み付ける事ができるとともに、排気ガス浄化用
コンバーター組立て後の取り扱い、輸送時に於いても、
触媒保持体がシェルの内で動いたり、破損することがな
い。このように、脆いセラミックファイバー層は、これ
に損傷を与えることなく、容易にシェル内に組付けるこ
とができる。
In the manufacturing method of the present invention, the ceramic fiber in the converter for purifying exhaust gas is covered with an airtight sheet, and the inside of the airtight sheet is depressurized. Therefore, the thickness of the ceramic fiber is reduced to a thickness equal to or 150% larger than the distance between the shell and the catalyst holder. Therefore, the ceramic fiber layer can be reliably and easily assembled between the shell and the catalyst holder without requiring complicated steps, and can be handled and transported after the exhaust gas purifying converter is assembled. Even if
The catalyst support does not move or break within the shell. Thus, the brittle ceramic fiber layer can be easily assembled in the shell without damaging it.

【0019】上記のごとく、本発明によれば、シール層
が高温で劣化することのない排気ガス浄化用コンバータ
ーを、シール層を損傷させることなく低コストで確実容
易に組付けることができる。
As described above, according to the present invention, an exhaust gas purifying converter in which the seal layer does not deteriorate at high temperatures can be assembled easily at low cost without damaging the seal layer.

【0020】[0020]

【実施例】【Example】

(実施例1)まず、本発明の実施例により製造される排
気ガス浄化用コンバーターにつき、図1を用いて説明す
る。図1に示すごとく、本例の排気ガス浄化用コンバー
ター1は、触媒保持体4と、該触媒保持体4の外方を覆
うシェル2と、両者の間に配置したセラミックファイバ
ー層31とよりなり、上記セラミックファイバー層31
と触媒保持体4は、気密シート32により被覆されてい
る。そして、上記セラミックファイバー層31は、触媒
保持体4側をアルミナファイバー、シェル側をシリカ−
アルミナセラミックファイバーの2層構造、上記気密シ
ート32はポリエチレン、上記触媒保持体4はコージェ
ライトよりなる。なお、符号39は、上記セラミックフ
ァイバー層31を配置する際に生じた継目である。上記
シェル2は上シェル21と下シェル22とからなる。上
記上シェル21と下シェルと22は、共に断面が半長円
形の殻である。その両端には、ボルト穴211を有する
フランジ210、220が設けられている。また、上記
触媒保持体4は、断面が格子状のハニカム体である。上
記断面は長円で、その大きさは、長径が150mm、短
径が100mmである。本例の排気ガス浄化用コンバー
ター1においては、触媒保持体4とシェル2との間にシ
ール層として、セラミックファイバー層31を配設して
いる。また、上記セラミックファイバー層31と触媒保
持体4は気密シート32で被覆されている。これによ
り、耐熱性に優れてはいるが、脆く、摩擦等に弱い、セ
ラミックファイバー層31を損傷することなく、シェル
2内に組付けることができる。このため、本例のセラミ
ックファイバー層31は、排気ガス、特に高温のリーン
バーン排気ガスに曝されても、従来のバーミキュライト
製の緩衝シール材のように膨張圧力の低下による変形、
品質の劣化を起こすことがない。
(Embodiment 1) First, an exhaust gas purifying converter manufactured according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the exhaust gas purifying converter 1 of this example includes a catalyst holder 4, a shell 2 that covers the outside of the catalyst holder 4, and a ceramic fiber layer 31 disposed between the catalyst holder 4 and the shell 2. , The ceramic fiber layer 31
The catalyst holder 4 is covered with an airtight sheet 32. In the ceramic fiber layer 31, the catalyst holder 4 side is made of alumina fiber and the shell side is made of silica-
A two-layer structure of alumina ceramic fibers, the airtight sheet 32 is made of polyethylene, and the catalyst holder 4 is made of cordierite. Reference numeral 39 is a seam generated when the ceramic fiber layer 31 is arranged. The shell 2 includes an upper shell 21 and a lower shell 22. The upper shell 21 and the lower shell 22 are both shells having a semi-elliptical cross section. At both ends, flanges 210 and 220 having bolt holes 211 are provided. The catalyst holder 4 is a honeycomb body having a lattice-shaped cross section. The cross section is an ellipse, and the size is 150 mm in major axis and 100 mm in minor axis. In the exhaust gas purifying converter 1 of this example, a ceramic fiber layer 31 is provided as a seal layer between the catalyst holder 4 and the shell 2. The ceramic fiber layer 31 and the catalyst holder 4 are covered with an airtight sheet 32. As a result, the ceramic fiber layer 31 is excellent in heat resistance, but is fragile, weak against friction, etc., and can be assembled in the shell 2 without damaging the ceramic fiber layer 31. Therefore, the ceramic fiber layer 31 of the present example is deformed due to a decrease in expansion pressure like a conventional buffer seal material made of vermiculite even when exposed to exhaust gas, particularly high-temperature lean burn exhaust gas,
Does not cause quality deterioration.

【0021】次に、本発明である排気ガス浄化用コンバ
ーターの製作方法を示す。図2(A)に示すごとく、短
辺100mm、長辺400mm、厚さ25mm、嵩密度
0.10g/cm3 の板状のセラミックファイバー31
を準備する。上記セラミックファイバー31には端部に
凹状係合部310、及び該凹状係合部310に噛合させ
る凸状係合部311を設ける。一方、図2(B)に示す
ごとく、ポリエチレンよりなる熱融着フィルム32を準
備する。次に、図3(A)に示すごとく、触媒保持体4
を上記セラミックファイバー31の上に載置する。次い
で、図3(B)に示すごとく、該セラミックファイバー
31を触媒保持体4の周囲に環状に被覆する。この時、
上記セラミックファイバー層31の両端の凹状係合部3
10と凸状係合部311を互いに噛合させる。この部分
が継目39である。次いで、図3(C)に示すごとく、
熱融着フィルム32をセラミックファイバー31の外側
より挟み、内部を減圧した後、周囲のフィルムをホット
メルトにより貼り合わせ(33)完全密閉することによ
り、ファイバーシール体3のセラミックファイバー31
の部分は厚み10mm、嵩密度0.25g/cm3 とな
る。この後、ファイバーシール体3の外面に潤滑油をコ
ーティングした。次いで、図3(D)に示すごとく、上
記ファイバーシール体3を下シェル22の上部に置く。
更にファイバーシール体3の上に上シェル21を載置す
る。次いで、上シェル21と下シェル22を加圧し、そ
の後、フランジのボルト穴にボルトを挿入し、上シェル
21と下シェル22とを固定する(図1)。上記のごと
く、本例によれば、セラミックファイバー層31に損傷
を与えることなく、セラミックファイバー層31を容易
にシェル2と触媒保持体4との間に取付けることがで
き、排気ガス浄化用コンバーター1を容易に製作するこ
とができる。尚、このときの、触媒保持体4とシェル2
のクリアランスは6mmである。
Next, a method of manufacturing the exhaust gas purifying converter of the present invention will be described. As shown in FIG. 2A, a plate-shaped ceramic fiber 31 having a short side of 100 mm, a long side of 400 mm, a thickness of 25 mm, and a bulk density of 0.10 g / cm 3.
To prepare. The ceramic fiber 31 is provided at its end with a concave engaging portion 310 and a convex engaging portion 311 to be engaged with the concave engaging portion 310. On the other hand, as shown in FIG. 2B, a heat fusion film 32 made of polyethylene is prepared. Next, as shown in FIG. 3 (A), the catalyst holder 4
Is placed on the ceramic fiber 31. Next, as shown in FIG. 3B, the ceramic fiber 31 is annularly coated around the catalyst holder 4. This time,
Recessed engaging portions 3 at both ends of the ceramic fiber layer 31
10 and the convex engaging portion 311 are meshed with each other. This portion is the seam 39. Then, as shown in FIG.
After sandwiching the heat-sealing film 32 from the outside of the ceramic fiber 31 and depressurizing the inside, the surrounding films are bonded by hot melt (33) to completely seal the ceramic fiber 31 of the fiber seal body 3.
The portion has a thickness of 10 mm and a bulk density of 0.25 g / cm 3 . Then, the outer surface of the fiber seal body 3 was coated with a lubricating oil. Then, as shown in FIG. 3D, the fiber seal body 3 is placed on the upper portion of the lower shell 22.
Further, the upper shell 21 is placed on the fiber seal body 3. Next, the upper shell 21 and the lower shell 22 are pressurized, and then a bolt is inserted into the bolt hole of the flange to fix the upper shell 21 and the lower shell 22 (FIG. 1). As described above, according to this example, the ceramic fiber layer 31 can be easily attached between the shell 2 and the catalyst holder 4 without damaging the ceramic fiber layer 31, and the exhaust gas purifying converter 1 Can be easily manufactured. At this time, the catalyst holder 4 and the shell 2
Has a clearance of 6 mm.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明により製造される排気ガス浄化用コンバ
ーターの断面斜視図。
FIG. 1 is a sectional perspective view of an exhaust gas purifying converter manufactured according to the present invention.

【図2】実施例1の製作方法の説明図。FIG. 2 is an explanatory diagram of a manufacturing method according to the first embodiment.

【図3】図2に続く、実施例1の製作方法の説明図。FIG. 3 is an explanatory view of the manufacturing method of Example 1 following FIG.

【図4】従来における排気ガス浄化用コンバーターの縦
断面図。
FIG. 4 is a vertical cross-sectional view of a conventional exhaust gas purification converter.

【図5】従来における排気ガス浄化用コンバーターの緩
衝シール材の構成図。
FIG. 5 is a configuration diagram of a buffer seal material of a conventional exhaust gas purification converter.

【図6】従来における緩衝シール材の取付に関する説明
図。
FIG. 6 is an explanatory diagram relating to conventional attachment of a cushioning seal material.

【図7】図6に続く、緩衝シール材の取付に関する問題
点の説明図。
FIG. 7 is an explanatory view of a problem regarding attachment of a cushioning seal material, following FIG. 6;

【符号の説明】[Explanation of symbols]

1:排気ガス浄化用コンバーター 2:シェル 21:
上シェル 22:下シェル 3:ファイバーシール体
31:セラミックファイバー層 32:気密シート 3
3:気密シートのホットメルト部 4:触媒保持体
1: Exhaust gas purification converter 2: Shell 21:
Upper shell 22: Lower shell 3: Fiber seal
31: Ceramic fiber layer 32: Airtight sheet 3
3: Hot melt part of airtight sheet 4: Catalyst holder

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 触媒保持体と該触媒保持体の外方を覆う
シェルと、両者の間に配置したセラミックファイバー層
よりなる、自動車用排気ガス浄化用コンバーター断熱シ
ール材の取り付け方法に於いて、 板状または円筒状のセラミックファイバーを前記触媒保
持体の外周部に配置した後、気密シートの中に入れ、内
部を減圧する事により、該セラミックファイバーの嵩密
度を0.10〜0.40g/cm3 とするとともに、該
セラミックファイバーの厚みを前記触媒保持体と前記シ
ェルの組みたて後のクリアランスの1.0〜2.5倍の
厚みまで減少させたのち前記気密シートを密閉し、 その後、その外側からシェルをあてがい、加圧組付けす
ることを特徴とする自動車用排気ガス浄化用コンバータ
ー断熱シール材の取り付け方法。
1. A method of mounting a heat insulating seal material for an exhaust gas purifying converter for an automobile, comprising a catalyst holder, a shell covering the outside of the catalyst holder, and a ceramic fiber layer arranged between the two. After arranging a plate-shaped or cylindrical ceramic fiber on the outer peripheral portion of the catalyst holder, it is put in an airtight sheet and the inside pressure is reduced to give a bulk density of 0.10 to 0.40 g / cm 3 and the thickness of the ceramic fiber is reduced to 1.0 to 2.5 times the clearance after the catalyst holder and the shell have been assembled, and then the airtight sheet is sealed, and A method for mounting a heat insulating sealing material for a converter for purifying exhaust gas for automobiles, characterized in that a shell is applied from the outside and pressure is applied.
【請求項2】 請求項1に於いて、上記気密シートは、
ポリ塩化ビニール、ポリエチレンアイオノマー樹脂等の
有機合成シートよりなることを特徴とする自動車用排気
ガス浄化用コンバーター断熱シール材の取り付け方法。
2. The airtight sheet according to claim 1,
A method for mounting a heat insulating seal material for an automobile exhaust gas purifying converter, which comprises an organic synthetic sheet such as polyvinyl chloride or polyethylene ionomer resin.
JP34773993A 1993-12-24 1993-12-24 How to install a converter heat-insulating sealing material for automotive exhaust gas purification Expired - Fee Related JP3370410B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34773993A JP3370410B2 (en) 1993-12-24 1993-12-24 How to install a converter heat-insulating sealing material for automotive exhaust gas purification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34773993A JP3370410B2 (en) 1993-12-24 1993-12-24 How to install a converter heat-insulating sealing material for automotive exhaust gas purification

Publications (2)

Publication Number Publication Date
JPH07189678A true JPH07189678A (en) 1995-07-28
JP3370410B2 JP3370410B2 (en) 2003-01-27

Family

ID=18392262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34773993A Expired - Fee Related JP3370410B2 (en) 1993-12-24 1993-12-24 How to install a converter heat-insulating sealing material for automotive exhaust gas purification

Country Status (1)

Country Link
JP (1) JP3370410B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810353A1 (en) * 1996-05-29 1997-12-03 Ibiden Co, Ltd. Method of manufacturing a catalytic converter for the purification of exhaust gas
EP1207281A3 (en) * 2000-11-17 2004-01-21 J. Eberspächer GmbH & Co. KG Method for fixing a carrier mat on a monolith
KR100489135B1 (en) * 2002-09-02 2005-05-17 현대자동차주식회사 Mat for catalytic converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810353A1 (en) * 1996-05-29 1997-12-03 Ibiden Co, Ltd. Method of manufacturing a catalytic converter for the purification of exhaust gas
US5862590A (en) * 1996-05-29 1999-01-26 Ibiden Co., Ltd. Method of manufacturing catalytic converter for the purification of exhaust gas
KR100417641B1 (en) * 1996-05-29 2004-05-14 이비덴 가부시키가이샤 Manufacturing method of catalytic converter for purification of exhaust gas
EP1207281A3 (en) * 2000-11-17 2004-01-21 J. Eberspächer GmbH & Co. KG Method for fixing a carrier mat on a monolith
KR100489135B1 (en) * 2002-09-02 2005-05-17 현대자동차주식회사 Mat for catalytic converter

Also Published As

Publication number Publication date
JP3370410B2 (en) 2003-01-27

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