JPH0261313A - Structure for purifying exhaust gas - Google Patents
Structure for purifying exhaust gasInfo
- Publication number
- JPH0261313A JPH0261313A JP63214041A JP21404188A JPH0261313A JP H0261313 A JPH0261313 A JP H0261313A JP 63214041 A JP63214041 A JP 63214041A JP 21404188 A JP21404188 A JP 21404188A JP H0261313 A JPH0261313 A JP H0261313A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic honeycomb
- exhaust gas
- cushioning material
- honeycomb
- buffer material
- 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
- 239000000919 ceramic Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000000746 purification Methods 0.000 claims description 9
- 239000012784 inorganic fiber Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052902 vermiculite Inorganic materials 0.000 claims description 3
- 235000019354 vermiculite Nutrition 0.000 claims description 3
- 239000010455 vermiculite Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 abstract description 14
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 210000002421 cell wall Anatomy 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
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)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は内燃機関の排気ガスを浄化する触媒コンバータ
やフィルタに利用する排気カス浄化用構造物に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an exhaust gas purifying structure used in a catalytic converter or filter for purifying exhaust gas from an internal combustion engine.
従来の技術
近年、内燃機関の排気ガスを浄化するため、ハニカム状
セラミックスを用いた触媒コンバータやフィルタを排気
管の途中に付けられるようになった。このセラミックハ
ニカムは、押し出し成形やコルゲート巻き上げ加工によ
りセラミックを蜂の巣状にしたものである。触媒コンバ
ータは主としてガソリンエンジンに用いられて排ガス中
の炭化水素や一酸化炭素を酸化するもので、比較的細か
いセル密度のセラミックハニカムに白金等の貴金属の触
媒を担持させたものである。フィルタは主としてディー
ゼルエンジンに用いられて排ガス中のパティキュレート
(煤)を除去するもので、空孔率が大きい素材で比較的
粗いセル密度のセラミックハニカムのセルの一端と相隣
り合うセルの他端をプラグで閉塞して、中に入った排ガ
スはセル壁を透過しなければ外部にでられない構造とし
たものである。いずれの場合にもセラミックハニカムは
、外周を緩衝材となる無機繊維マットや波状加工した金
属網で覆い、前後に排ガスの接続口を有する金属容器に
収納して使用される。BACKGROUND OF THE INVENTION In recent years, in order to purify exhaust gas from internal combustion engines, it has become possible to install catalytic converters and filters using honeycomb-shaped ceramics in the middle of exhaust pipes. This ceramic honeycomb is made of ceramic into a honeycomb shape by extrusion molding or corrugate rolling. Catalytic converters are mainly used in gasoline engines to oxidize hydrocarbons and carbon monoxide in exhaust gas, and are made by supporting a precious metal catalyst such as platinum on a ceramic honeycomb with relatively fine cell density. Filters are mainly used in diesel engines to remove particulates (soot) from exhaust gas, and are made of ceramic honeycomb cells made of a material with high porosity and relatively coarse cell density.One end of the cell and the other end of the adjacent cell. The cell is closed with a plug, and the exhaust gas that has entered the cell cannot escape unless it passes through the cell wall. In either case, the ceramic honeycomb is used by covering its outer periphery with an inorganic fiber mat or corrugated metal mesh that serves as a cushioning material, and storing it in a metal container that has exhaust gas connection ports at the front and rear.
発明が解決しようとする課題
このようなセラミックハニカム応用品が内燃機関の排気
ガス流内に置かれると、その通気抵抗のため背圧がかか
り、セラミックハニカムは後方に押し出されようとする
。そのため前記緩衝材は、単に外部からの機械的振動か
ら保護する目的だけでなく、セラミックハニカムをしっ
かり掴んで保持する役目をもつ。しかし背圧に抗する力
でセラミックハニカムを掴むためには、硬くて密度が高
い緩衝材を使用しなければならない。一方、セラミック
ハニカムに高温排ガスが流れたり、内部にパティキュレ
ートを溜めて燃焼させたりした場合、この緩衝材を伝っ
て外気に放熱され・、セラミックハニカムの中心部と外
周部分との間で大きな温度差が生じる。そのため外周部
分は内部の熱彫版によって大きな引っ張り応力を受ける
。そしてこの応力にセラミックは耐えきれず、外周部に
リングオフと呼ばれるリング状のクラックが入る。Problem to be Solved by the Invention When such a ceramic honeycomb application is placed in the exhaust gas flow of an internal combustion engine, back pressure is applied due to its ventilation resistance, and the ceramic honeycomb tends to be pushed rearward. Therefore, the cushioning material has the function of not only simply protecting the ceramic honeycomb from external mechanical vibrations, but also firmly gripping and holding the ceramic honeycomb. However, in order to grip the ceramic honeycomb with a force that resists back pressure, a hard and dense cushioning material must be used. On the other hand, when high-temperature exhaust gas flows through the ceramic honeycomb, or when particulates accumulate inside and burn, heat is radiated to the outside air through this cushioning material, causing a large temperature between the center and the outer periphery of the ceramic honeycomb. It makes a difference. Therefore, the outer periphery is subjected to large tensile stress due to internal thermal engraving. The ceramic cannot withstand this stress, and a ring-shaped crack called a ring-off occurs on the outer periphery.
本発明は、セラミックハニカムを容器の中でしっかり保
持し、かつ中心部が高温状態に加熱されても、リング状
のクラックが生じないようにして、構造体としての原形
を維持して有効な排気ガス浄化機能を果たせる排気ガス
浄化用構造物を提供することを目的とする。The present invention securely holds a ceramic honeycomb in a container, prevents ring-shaped cracks from occurring even when the center is heated to a high temperature, maintains the original shape of the structure, and effectively exhausts the honeycomb. The object of the present invention is to provide an exhaust gas purification structure that can perform a gas purification function.
課題を解決するための手段
無機繊維と有機バインダを主成分とし、表面に多数の小
さい穴や多数の細い溝のある厚いシートを作り、このシ
ートを排気ガス浄化機能を有するセラミックハニカムの
外周に緩衝材として巻き、このセラミックハニカムをシ
ートの上から半径方向に加圧してエンジン排気管に接続
される容器に収納した構成とする。Means to solve the problem: A thick sheet made of inorganic fibers and an organic binder as the main ingredients, with many small holes and many thin grooves on the surface, is made, and this sheet is buffered around the outer periphery of a ceramic honeycomb that has an exhaust gas purification function. The ceramic honeycomb is then radially pressurized from above the sheet and housed in a container connected to the engine exhaust pipe.
作用
上記の構成によれば、緩衝材の表面に施された多数の穴
や溝により、セラミックハニカムの外周表面との間の摩
擦力が大きくなって、エンジンがらの背圧によりセラミ
ックハニカムが下流に押し出されるのを防ぐ。また緩衝
材は多数の穴や溝加工されているので全体としての密度
が小さくなっている。よって相対的に外周方向への熱伝
導度が低くなって、エンジンの高温排ガスや高温燃焼ガ
スによりセラミックハニカムが加熱されても容器を伝っ
た外気への放熱が遮断されるので、内部に生じる温度差
は小さい。その結果、セラミックハニカムの外周部に発
生する熱応力も小さくなり、内部にクラックの生じるよ
うな変形はしない。Effect: According to the above configuration, the large number of holes and grooves formed on the surface of the cushioning material increase the frictional force between it and the outer peripheral surface of the ceramic honeycomb, and the back pressure from the engine causes the ceramic honeycomb to move downstream. Prevent it from being pushed out. Additionally, the cushioning material has a large number of holes and grooves, so its overall density is low. Therefore, the thermal conductivity toward the outer circumference is relatively low, and even if the ceramic honeycomb is heated by high-temperature engine exhaust gas or high-temperature combustion gas, heat radiation to the outside air that has passed through the container is blocked, so the temperature generated inside is reduced. The difference is small. As a result, the thermal stress generated on the outer periphery of the ceramic honeycomb is also reduced, and there is no deformation that would cause internal cracks.
実施例
以下1本発明の排気ガス浄化用構造物の一実施例を添付
図面にもとづいて説明する。EXAMPLE 1 An example of the exhaust gas purifying structure of the present invention will be described below with reference to the accompanying drawings.
第1図はディーゼルエンジンの排ガスに含まれるパティ
キュレートを除去するフィルタとして応用した排気ガス
浄化用構造物で、それをエンジンく図示せず)の排気管
に接続した時の縦断面図を示したものである。図中1は
円筒状セラミックハニカムである。セラミックハニカム
1は、内部に矩形の流路となるセル2 (2a、2b)
を構成するセル壁3からなる構造体である。セル2aの
一端及び相隣り合うセル2bの他端とは交互にプラグ4
により封じられている。セラミックハニカム1の外周に
は緩衝材5を巻いた後、耐熱ステンレス製の容器6に収
納している。緩衝材5は熱膨張性の蛭石と無機繊維と有
機バインダとを混合して表面に多数の穴7を有するシー
トに湿式成型したものである。よって、この構成で全体
を約400℃に加熱して緩衝材5に含まれる蛭石を彫版
させ、半径方向にセラミックハニカム1を圧縮をしてい
る。容器6の両端はコーン状にテーバをつけて絞り込み
、一端はエンジン接続口8、他端はマフラー接続口9と
している。容器6の内側には、セラミックハニカム1の
前後に緩衝材5を固定するようにストッパ10a、10
bを溶接している。Figure 1 shows an exhaust gas purification structure applied as a filter to remove particulates contained in the exhaust gas of a diesel engine, and shows a vertical cross-sectional view when it is connected to the exhaust pipe of an engine (not shown). It is something. In the figure, 1 is a cylindrical ceramic honeycomb. Ceramic honeycomb 1 has cells 2 (2a, 2b) that form rectangular flow paths inside.
It is a structure consisting of cell walls 3 that constitute a. Plugs 4 are connected alternately to one end of the cell 2a and the other end of the adjacent cell 2b.
It is sealed by. After wrapping a cushioning material 5 around the outer periphery of the ceramic honeycomb 1, it is stored in a container 6 made of heat-resistant stainless steel. The cushioning material 5 is a mixture of thermally expandable vermiculite, inorganic fibers, and an organic binder, which is wet-molded into a sheet having a large number of holes 7 on the surface. Therefore, with this configuration, the whole is heated to about 400° C. to engrave the vermiculite contained in the buffer material 5, and the ceramic honeycomb 1 is compressed in the radial direction. Both ends of the container 6 are tapered into a cone shape, and one end is an engine connection port 8 and the other end is a muffler connection port 9. Stoppers 10a and 10 are provided inside the container 6 to fix the cushioning material 5 before and after the ceramic honeycomb 1.
b is welded.
次に、この一実施例の構成における動作を説明する。ま
ずディーゼルエンジンの通常運転時について説明する。Next, the operation of the configuration of this embodiment will be explained. First, the normal operation of the diesel engine will be explained.
ディーゼルエンジンの排気管に接続された上記エンジン
接続口8には、機関の運転によりパティキュレートを含
んだ排ガスが流れ込む。そこから排ガスは、エンジン接
続口8側に開口しているセル2aに入り、そこでセル壁
3を透過してマフラー接続口9に開口しているセル2b
に入る。このとき排ガス中に含まれているパティキュレ
ートはセル壁3を透過できずにエンジン接続口9側に開
口しているセル2a内にとどまって堆積する。一方、パ
ティキュレートを取り除かれてクリーンになった排ガス
は、マフラー接続口9に入り、排気マフラーを経て大気
に放出される。Exhaust gas containing particulates flows into the engine connection port 8 connected to the exhaust pipe of the diesel engine due to engine operation. From there, the exhaust gas enters the cell 2a that is open to the engine connection port 8, and there, it passes through the cell wall 3 to the cell 2b that opens to the muffler connection port 9.
to go into. At this time, particulates contained in the exhaust gas cannot pass through the cell wall 3, and remain and accumulate within the cell 2a that is open to the engine connection port 9 side. On the other hand, the exhaust gas, which has been made clean by removing particulates, enters the muffler connection port 9 and is discharged to the atmosphere through the exhaust muffler.
このようにパティキュレートを堆積する作業を継続して
いる間、セラミックハニカム1の通気抵抗はパティキュ
レートの目詰まりにより徐々に太き(なり、増大した背
圧でもってセラミックハニカム1を後方に押し出そうと
する。しかし、セラミックハニカム1の外周と緩衝材5
の多数の穴のあいた表面との大きな摩擦力でもってその
力に抗してセラミックハニカム1を保持し続ける。そし
てセラミックハニカム1内に十分にパティキュレートが
溜まり、これ以上溜まるとエンジンに悪影響を与える段
階になるとりジェネレーションに入る。リジェネレーシ
ョンには、まずディーゼルエンジンの吸気口を絞り、エ
ンジンを過負荷の状態にする。この状態で5分間はど維
持すると、排ガス温度は600℃以上になる。そしてセ
ラミックハニカム1の内部も約600℃の温度に上昇し
、内部に堆積していたパティキュレートは燃焼を始める
。そして、セラミックハニカム1の内部温度は燃焼熱に
よって800℃から1000℃にまで達する。またセラ
ミックハニカム1の外周は、緩衝材5を通じて容器6か
ら外部に放熱するが、緩衝材5の多数の穴の空気断熱に
よってその量が比較的低(抑えられる。よって、セラミ
ックハニカム1の中心部と外周部との温度差は200℃
以内に保ち、中心部の熱彫版による外周部に生じる機械
的な変位を小さく抑える。While the work of depositing particulates continues, the ventilation resistance of the ceramic honeycomb 1 gradually increases due to clogging of the particulates, and the increased back pressure pushes the ceramic honeycomb 1 backward. However, the outer periphery of the ceramic honeycomb 1 and the buffer material 5
The ceramic honeycomb 1 continues to be held against the large perforated surface by a large frictional force against that force. Then, a sufficient amount of particulates accumulates in the ceramic honeycomb 1, and if any more particulates accumulate, it will enter a generation stage where it will adversely affect the engine. For regeneration, the diesel engine's intake port is first throttled and the engine is overloaded. If this state is maintained for 5 minutes, the exhaust gas temperature will rise to 600°C or higher. The temperature inside the ceramic honeycomb 1 also rises to about 600° C., and the particulates deposited inside begin to burn. The internal temperature of the ceramic honeycomb 1 reaches from 800°C to 1000°C due to the heat of combustion. Further, the outer periphery of the ceramic honeycomb 1 radiates heat from the container 6 to the outside through the buffer material 5, but the amount of heat is relatively low (reduced) by the air insulation of the many holes in the buffer material 5. The temperature difference between and the outer periphery is 200℃
The mechanical displacement that occurs on the outer periphery due to thermal engraving at the center is kept to a minimum.
この結果、セラミックハニカム1が容器6の下流に押し
出されて破壊することはない。またセラミックハニカム
1の外周部においてクラックが生じなくなり、内燃機関
の排気ガスに置かれ繰り返し急加熱が与えられるような
使用条件でも破壊されることはない。As a result, the ceramic honeycomb 1 will not be pushed downstream of the container 6 and will not be destroyed. In addition, cracks do not occur on the outer periphery of the ceramic honeycomb 1, and it will not be destroyed even under usage conditions such as being placed in the exhaust gas of an internal combustion engine and repeatedly subjected to rapid heating.
尚、緩衝材5は第2図のように表面に多数の細い溝11
をセラミックハニカム1の軸と傾斜して施した形状によ
って、上記と同様な効果を奏することができる。The cushioning material 5 has many thin grooves 11 on its surface as shown in FIG.
The same effect as described above can be achieved by the shape of the ceramic honeycomb 1 being inclined with respect to the axis of the ceramic honeycomb 1.
発明の効果
本発明によれば、セラミックハニカムとそれを収納する
容器との間に介在する緩衝材の表面に多数の穴や細い溝
を設けることにより、排ガスによる背圧に対しても十分
絶えられる握力を呈することができる。また緩衝材の断
面に生じる空気断熱によって、外気に放熱する熱量を小
さ(抑え、セラミックハニカムの内部と外周部に生じる
温度差を小さ(し、内部の熱膨張により外周部が受ける
軸方向の引っ張り力による変位を最小に抑え、外周部に
発生するクラックを無(することができる。Effects of the Invention According to the present invention, by providing a large number of holes and thin grooves on the surface of the cushioning material interposed between the ceramic honeycomb and the container housing it, back pressure caused by exhaust gas can be sufficiently eliminated. Can exhibit grip strength. In addition, air insulation generated in the cross section of the cushioning material reduces the amount of heat radiated to the outside air, reduces the temperature difference between the inside and the outer periphery of the ceramic honeycomb, and reduces the axial tension that the outer periphery receives due to internal thermal expansion. Displacement due to force can be minimized and cracks generated on the outer periphery can be eliminated.
第1図は本発明の一実施例の排気ガス浄化用構造物の縦
断面図、第2図は本発明の他の一実施例の排気ガス浄化
用構造物の組立途中の状態を示す斜視図である。
1・・・・セラミックハニカム、4・・・・プラグ、5
・・・・緩衝材、6・・・・容器、7・・・・穴、11
・・・・溝。FIG. 1 is a vertical sectional view of an exhaust gas purification structure according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in the middle of assembly of an exhaust gas purification structure according to another embodiment of the present invention. It is. 1...Ceramic honeycomb, 4...Plug, 5
...Buffer material, 6...Container, 7...Hole, 11
····groove.
Claims (4)
該セラミックハニカムの外周に巻いた緩衝材、該緩衝材
を包み前記セラミックハニカムの前後に面した排ガス導
入口をもつ金属製の容器とを備えた排ガス浄化用構造物
において、少なくとも前記緩衝材のセラミックハニカム
に接触する面に凹凸加工を施したことを特徴とする排気
ガス浄化用構造物。(1) Ceramic honeycomb with a large number of cells inside,
In an exhaust gas purification structure comprising a buffer material wrapped around the outer periphery of the ceramic honeycomb, and a metal container enclosing the buffer material and having an exhaust gas inlet facing the front and rear sides of the ceramic honeycomb, at least the ceramic of the buffer material An exhaust gas purifying structure characterized by having a textured surface that contacts the honeycomb.
主成分とした特許請求の範囲第1項記載の排気ガス浄化
用構造物。(2) The exhaust gas purifying structure according to claim 1, the main component of which is a mixed composition of inorganic fibers, vermiculite, and an organic binder.
する特許請求の範囲第1項記載の排気ガス浄化用構造物
。(3) The structure for exhaust gas purification according to claim 1, characterized in that a large number of holes are formed in the plane of the buffer material.
する特許請求の範囲第1項記載の排気ガス浄化用構造物
。(4) The structure for exhaust gas purification according to claim 1, characterized in that a large number of grooves are provided within the plane of the buffer material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63214041A JPH0261313A (en) | 1988-08-29 | 1988-08-29 | Structure for purifying exhaust gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63214041A JPH0261313A (en) | 1988-08-29 | 1988-08-29 | Structure for purifying exhaust gas |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0261313A true JPH0261313A (en) | 1990-03-01 |
Family
ID=16649297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63214041A Pending JPH0261313A (en) | 1988-08-29 | 1988-08-29 | Structure for purifying exhaust gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0261313A (en) |
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US7896943B2 (en) | 2008-02-07 | 2011-03-01 | Bgf Industries, Inc. | Frustum-shaped insulation for a pollution control device |
US7950148B2 (en) * | 2006-03-10 | 2011-05-31 | Ibiden Co., Ltd. | Holding sealer and exhaust gas purifying device |
US8652599B2 (en) | 2003-01-22 | 2014-02-18 | 3M Innovative Properties Company | Molded three-dimensional insulator |
WO2015056652A1 (en) * | 2013-10-15 | 2015-04-23 | イビデン株式会社 | Exhaust gas purification device |
US20150260075A1 (en) * | 2012-11-16 | 2015-09-17 | Reinz-Dichtungs-Gmbh | Heat shield |
US9494071B2 (en) | 2003-06-30 | 2016-11-15 | 3M Innovative Properties Company | Mounting mat for mounting monolith in a pollution control device |
-
1988
- 1988-08-29 JP JP63214041A patent/JPH0261313A/en active Pending
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WO1999025964A1 (en) * | 1997-11-17 | 1999-05-27 | Minnesota Mining And Manufacturing Company | Surface tension relieved mounting material |
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