JP2001259438A - Catalytic converter - Google Patents
Catalytic converterInfo
- Publication number
- JP2001259438A JP2001259438A JP2000080376A JP2000080376A JP2001259438A JP 2001259438 A JP2001259438 A JP 2001259438A JP 2000080376 A JP2000080376 A JP 2000080376A JP 2000080376 A JP2000080376 A JP 2000080376A JP 2001259438 A JP2001259438 A JP 2001259438A
- Authority
- JP
- Japan
- Prior art keywords
- sealing material
- catalytic converter
- metal shell
- holding
- catalyst
- 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
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 68
- 239000003566 sealing material Substances 0.000 claims abstract description 53
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 18
- 238000012856 packing Methods 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 5
- 238000000151 deposition Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development 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
- 238000005470 impregnation Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，触媒コンバーターに関し，特に
触媒担持体の保持シール材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic converter, and more particularly, to a seal for holding a catalyst carrier.
【０００２】[0002]
【従来技術】エンジンの排気系には，排気ガス中の炭化
水素，一酸化炭素，酸化窒素などの排ガス成分を浄化す
る触媒コンバーターが設けられている。触媒コンバータ
ーは，排ガス成分を浄化する触媒を担持したセラミック
製触媒担持体と，これを収容する金属シェルとからな
る。触媒担持体と金属シェルとの間には，触媒担持体を
保持するための保持シール材が介設している。ここで，
金属シェルとセラミック製触媒担持体とは熱膨張係数が
異なるため，高温時に熱膨張差が生じる。このため，熱
膨張差を吸収し得るクッション性のある保持シール材の
開発が望まれている。一方，クッション性を有する保持
シール材は，嵩高である。そのため，触媒担持体ととも
に金属シェル内に装着する際の保持シール材の装着作業
性が低下する。2. Description of the Related Art An exhaust system of an engine is provided with a catalytic converter for purifying exhaust gas components such as hydrocarbons, carbon monoxide and nitrogen oxide in exhaust gas. The catalytic converter is composed of a ceramic catalyst carrier carrying a catalyst for purifying exhaust gas components, and a metal shell accommodating the catalyst carrier. A holding sealing material for holding the catalyst support is interposed between the catalyst support and the metal shell. here,
Since the metal shell and the ceramic catalyst carrier have different coefficients of thermal expansion, a difference in thermal expansion occurs at high temperatures. Therefore, development of a holding sealing material having a cushioning property capable of absorbing a difference in thermal expansion is desired. On the other hand, a holding sealing material having cushioning properties is bulky. For this reason, the mounting workability of the holding sealing material when mounted in the metal shell together with the catalyst carrier is reduced.
【０００３】[0003]
【解決しようとする課題】本発明は，金属シェル内への
触媒保持体の装着作業がしやすく，クッション性に優れ
た触媒担持体用の保持シール材を用いた触媒コンバータ
ーを提供しようとするものである。An object of the present invention is to provide a catalytic converter using a holding sealing material for a catalyst carrier which is easy to mount a catalyst carrier in a metal shell and has excellent cushioning properties. It is.
【０００４】[0004]
【課題の解決手段】請求項１の発明は，触媒保持体と，
該触媒保持体の外方を覆う金属シェルと，上記触媒保持
体と上記金属シェルとの間に配置される保持シール材と
から構成される触媒コンバーターにおいて，上記保持シ
ール材は，１００ｃｍ２の中に５０〜３０００個の密度
でニードルパンチング処理がされた無機質繊維マットか
らなり，かつ有機質の含有量が０を超えて大きく且つ２
重量％以下であり，０．１５〜０．４５ｇ／ｃｍ３の充
填密度において３００〜１０００℃の間に加熱したとき
に５〜５００ｋＰａの面圧を発生することを特徴とする
触媒コンバーターである。The invention according to claim 1 comprises a catalyst holding body,
In a catalytic converter composed of a metal shell that covers the outside of the catalyst holding body and a holding sealing material disposed between the catalyst holding body and the metal shell, the holding sealing material has a size of 100 cm 2 . The inorganic fiber mat is needle-punched at a density of 50 to 3000 pieces, and the content of organic matter is larger than 0 and larger than 2.
It is a catalytic converter characterized by generating a surface pressure of 5 to 500 kPa when heated to 300 to 1000 ° C. at a packing density of 0.15 to 0.45 g / cm 3 .
【０００５】本発明において，保持シール材における有
機成分の含有量は，０を超えて大きく且つ２重量％以下
である。有機成分は保持シール材のバインダーとして働
き，保持シール材からの繊維の飛散を抑制する。また，
保持シール材の嵩高性をある程度抑制する。したがっ
て，触媒担持体とともに金属シェル内に装着する際の保
持シール材の装着性が改善される。[0005] In the present invention, the content of the organic component in the holding sealing material is larger than 0 and 2% by weight or less. The organic component acts as a binder for the holding seal material and suppresses scattering of fibers from the holding seal material. Also,
The bulkiness of the holding sealing material is suppressed to some extent. Therefore, the mountability of the holding sealing material when mounted in the metal shell together with the catalyst carrier is improved.
【０００６】一方，２重量％を超える場合には，排ガス
成分減量化のために金属シェルに収容後空焼きして有機
成分を焼失する工程が必要となり，製造工程数が複雑化
する。また，保持シール材の中の有機成分含有量が０，
即ち有機成分を含まない場合には，保持シール材から繊
維が飛散してしまう。そのため，触媒担持体とともに金
属シェルに装着するときの作業性が妨げられる。On the other hand, if it exceeds 2% by weight, a step of containing the metal shell and baking it to dry out the organic components is necessary to reduce the amount of exhaust gas components, which complicates the number of manufacturing steps. Further, the content of the organic component in the holding sealing material is 0,
That is, when no organic component is contained, the fibers are scattered from the holding sealing material. This hinders workability when the metal shell is mounted together with the catalyst carrier.
【０００７】無機質繊維マットにはニードルパンチング
処理が施されているため，繊維同士の絡まりが多くな
り，剛性力が高い。そのため，保持シール材の触媒担持
体を保持する力が大きい。また，保持シール材の嵩高性
を抑制し，触媒保持体とともに金属シェル内に装着する
際の保持シール材の装着性が改善される。[0007] Since the inorganic fiber mat has been subjected to the needle punching treatment, the fibers become entangled with each other and have high rigidity. Therefore, the holding sealing member has a large force for holding the catalyst carrier. In addition, the bulkiness of the holding seal material is suppressed, and the mountability of the holding seal material when mounted in the metal shell together with the catalyst holder is improved.
【０００８】上記保持シール材における有機成分の含有
量は０を超えて大きく且つ１重量％以下であることが好
ましい。１重量％を超える場合には，排ガス規制値をク
リアするために金属シェルに収容後空焼きして有機成分
を焼失する工程が必要となるおそれがある。保持シール
材に含まれる有機成分としては，バインダとしての機能
を有するものであれば特に限定はないが，たとえば，エ
マルジョンラテックスなどがある。無機質繊維マットに
有機成分を添加するにあたっては，浸漬法，スプレー掛
け法，ロールコータ法などがある。The content of the organic component in the holding sealing material is preferably larger than 0 and 1% by weight or less. If it exceeds 1% by weight, a step of accommodating in a metal shell and baking to remove organic components may be required in order to clear the exhaust gas regulation value. The organic component contained in the holding sealing material is not particularly limited as long as it has a function as a binder, and examples thereof include an emulsion latex. For adding an organic component to the inorganic fiber mat, there are a dipping method, a spraying method, a roll coater method and the like.
【０００９】請求項２の発明のように，上記保持シール
材は，少なくともアルミナまたはシリカを含む無機質繊
維からなることが好ましい。これにより，耐熱性が向上
する。As in the second aspect of the present invention, it is preferable that the holding sealing material is made of an inorganic fiber containing at least alumina or silica. Thereby, heat resistance is improved.
【００１０】上記保持シール材は，アルミナを７０重量
％以上含有していることが好ましい。これにより，耐熱
性が向上する。また，高温時の弾性力が高くなり，金属
シェルと触媒担持体との熱膨張差を吸収することがで
き，触媒担持体を保持する力が高まる。したがって，触
媒担持体のガタツキを防止でき，振動音の増大を抑制で
きる。また，９５０〜１０００℃もの高温下でも，これ
らの性質を十分に発揮でき，近年の内燃機関の高温化傾
向に十分に対応することができる。It is preferable that the holding sealing material contains 70% by weight or more of alumina. Thereby, heat resistance is improved. Further, the elastic force at a high temperature is increased, and the difference in thermal expansion between the metal shell and the catalyst carrier can be absorbed, and the force for holding the catalyst carrier increases. Therefore, rattling of the catalyst carrier can be prevented, and an increase in vibration noise can be suppressed. Further, even at a high temperature of 950 to 1000 ° C., these properties can be sufficiently exhibited, and it is possible to sufficiently cope with the recent tendency of the internal combustion engine to increase in temperature.
【００１１】上記無機質繊維マットへのニードルパンチ
ング処理は，１００ｃｍ２の中に５０〜３０００個の密
度のニードル跡が形成されるように行われている。５０
個未満の場合には，保持シール材が嵩高く，触媒保持体
とともに金属シェル内に装着できないことがある。３０
００個を超える場合には，触媒保持体の保持性能が低下
し，触媒保持体のずれが発生するおそれがある。The above-mentioned needle punching process is performed on the inorganic fiber mat so that needle marks having a density of 50 to 3000 needles are formed in 100 cm 2 . 50
If the number is less than the number, the holding sealing material may be bulky and may not be mounted in the metal shell together with the catalyst holder. 30
If the number exceeds 00, the holding performance of the catalyst holder may be reduced, and the catalyst holder may be displaced.
【００１２】金属シェル内における保持シール材の充填
密度は，０．１５〜０．４５ｇ／ｃｍ３であることが好
ましい。０．１５ｇ／ｃｍ３未満の場合には，触媒担持
体を保持する力が低下するおそれがあり，０．４５ｇ／
ｃｍ３を超える場合には，触媒保持体を破壊するおそれ
がある。The packing density of the holding sealing material in the metal shell is preferably 0.15 to 0.45 g / cm 3 . If it is less than 0.15 g / cm 3 , the force for holding the catalyst carrier may decrease,
If it exceeds cm 3 , the catalyst holder may be broken.
【００１３】上記金属シェル内に充填した上記保持シー
ル材は，０．１５〜０．４５ｇ／ｃｍ３の充填密度にお
いて，３００〜１０００℃に加熱したときに５ｋＰａ〜
５００ｋＰａの面圧を発生する。これにより，触媒担持
体を保持する力が増加し，触媒担持体をガタつかせるこ
となく安定して保持することができる。５ｋＰａ未満の
場合には，触媒担持体を保持する力が低下するおそれが
ある。５００ｋＰａを超える場合には，触媒保持体を破
壊するおそれがある。面圧を測定する温度が３００〜１
０００℃であるのは，触媒担持体は実車搭載時にこの温
度に晒されるからである。The holding sealing material filled in the metal shell has a packing density of 0.15 to 0.45 g / cm 3 , and when heated to 300 to 1000 ° C., 5 kPa to 5 kPa.
Generates a surface pressure of 500 kPa. Thereby, the force for holding the catalyst carrier increases, and the catalyst carrier can be stably held without rattling. If the pressure is less than 5 kPa, the force for holding the catalyst carrier may decrease. If it exceeds 500 kPa, there is a possibility that the catalyst holder may be broken. Temperature for measuring surface pressure is 300 ~ 1
The reason why the temperature is 000 ° C. is that the catalyst carrier is exposed to this temperature when mounted on an actual vehicle.
【００１４】請求項３の発明のように，上記金属シェル
は，圧入構造のものであることが好ましい。圧入構造と
は，金属シェルが，その中に触媒保持体を配置するにあ
たって，保持シール材により被覆された触媒保持体を，
金属シェルの中に加圧力によって押し入れるタイプのも
のであることをいう。かかる金属シェルの具体的形状
は，たとえば，筒状である。上記圧入構造によれば，装
着後に触媒保持体のガタつきを防止することができる。It is preferable that the metal shell has a press-fitting structure. The press-fitting structure means that the metal shell disposes the catalyst holding body covered with the holding sealing material when placing the catalyst holding body in it.
It means that it is a type that is pushed into the metal shell by pressing force. The specific shape of such a metal shell is, for example, cylindrical. According to the above-mentioned press-fitting structure, it is possible to prevent the catalyst holding body from rattling after the mounting.
【００１５】請求項４の発明のように，上記金属シェル
は，クラムシェル構造のものであることが好ましい。ク
ラムシェル構造は，たとえば，２分割されたシェル部材
からなり，その中に，保持シール材により被覆された触
媒保持体を装着し，その後シェル部材の合わせ目を溶
接，接着剤などにより接合してなる構造がある。かかる
構造によれば，金属シェル内への触媒保持体の装着が容
易である。It is preferable that the metal shell has a clamshell structure. The clam shell structure is composed of, for example, a shell member divided into two parts, in which a catalyst holding body covered with a holding sealing material is mounted, and then the joint of the shell members is joined by welding, adhesive or the like. There is a structure. According to such a structure, it is easy to mount the catalyst holder in the metal shell.
【００１６】請求項５の発明のように，上記金属シェル
は，巻き締め構造のものであることが好ましい。巻き締
め構造とは，保持シール材により被覆された触媒保持体
を準備し，その周囲に金属薄板を巻き締めることにより
金属シェルを形成するタイプのものである。かかる構造
によれば，触媒保持体の形状を問わず，容易に金属シェ
ル内へ装着することができる。It is preferable that the metal shell has a winding structure. The winding structure is a type in which a catalyst holding body covered with a holding sealing material is prepared, and a thin metal plate is wound around the holding body to form a metal shell. According to such a structure, regardless of the shape of the catalyst holder, it can be easily mounted in the metal shell.
【００１７】[0017]
【発明の実施の形態】実施形態例１ 本発明の実施形態に係る触媒コンバーターについて，図
１〜図４を用いて説明する。本例の触媒コンバーター５
は，図１に示すごとく，排ガス成分を浄化する触媒を担
持した触媒担持体３と，触媒担持体３の側面を被覆する
金属シェル２と，触媒担持体３と金属シェル２との間に
配置された無機質繊維マットからなる保持シール材１と
よりなる。保持シール材１における有機成分の含有量は
０〜８重量％である。保持シール材１を構成している無
機質繊維マットは，７０重量％のアルミナと，３０重量
％のシリカとからなり，ニードルパンチング処理が施さ
れている。金属シェル２内における保持シール材１の充
填密度は０．３５ｇ／ｃｍ３である。触媒コンバーター
５は，図２に示すごとく，自動車の車体９２の底部にお
いて，エンジン９の排気パイプ９１の途中に設けられて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A catalytic converter according to an embodiment of the present invention will be described with reference to FIGS. Catalytic converter 5 of this example
As shown in FIG. 1, a catalyst carrier 3 carrying a catalyst for purifying exhaust gas components, a metal shell 2 covering the side surface of the catalyst carrier 3, and a metal shell 2 disposed between the catalyst carrier 3 and the metal shell 2 And a holding sealing material 1 made of an inorganic fiber mat. The content of the organic component in the holding sealing material 1 is 0 to 8% by weight. The inorganic fiber mat constituting the holding sealing material 1 is made of 70% by weight of alumina and 30% by weight of silica, and has been subjected to a needle punching treatment. The packing density of the holding sealing material 1 in the metal shell 2 is 0.35 g / cm 3 . As shown in FIG. 2, the catalytic converter 5 is provided at the bottom of the vehicle body 92 of the automobile, in the middle of the exhaust pipe 91 of the engine 9.
【００１８】触媒担持体は，セラミックの一種であるコ
ーディエライト製である。図１に示すごとく，触媒担持
体３は，排気パイプ９１の上流側かまたは下流側の一方
が開口し，他方が閉塞された多数のセルの集合体からな
るハニカム構造体である。セル壁には微孔が多数開口し
ており，そこには排ガス成分を浄化する触媒（例えば，
白金，ロジウムなど）が付着している。したがって，触
媒担持体３は，上流側開口セル３１から下流側開口セル
３２へと，多孔性のセル壁を通じて排気ガスを通過させ
る。すると，セル壁内に担持されている触媒作用によ
り，排気ガスに含まれる排ガス成分が浄化される。The catalyst carrier is made of cordierite which is a kind of ceramic. As shown in FIG. 1, the catalyst carrier 3 is a honeycomb structure composed of an aggregate of a large number of cells in which one of the upstream and downstream sides of the exhaust pipe 91 is open and the other is closed. Many micropores are opened in the cell wall, and there is a catalyst (eg,
Platinum, rhodium, etc.). Therefore, the catalyst carrier 3 allows the exhaust gas to pass from the upstream open cells 31 to the downstream open cells 32 through the porous cell walls. Then, the exhaust gas component contained in the exhaust gas is purified by the catalytic action carried in the cell wall.
【００１９】次に，本例の触媒コンバーターの製造方法
について説明する。まず，無機質繊維は７０重量％のア
ルミナと３０重量％のシリカとからなり，ウェッブを形
成する。ウェッブにニードルパンチ装置を用いてニード
ルパンチング処理を施す。ニードルパンチ装置は，図３
に示すごとく，突き刺し方向に往復運動可能なニードル
ボード５１と，ウェッブ１０の表裏両面を支持する一対
の支持板５２とを有する。Next, a method for manufacturing the catalytic converter of this embodiment will be described. First, the inorganic fibers consist of 70% by weight of alumina and 30% by weight of silica to form a web. Needle punching is performed on the web using a needle punch device. Fig. 3
As shown in FIG. 1, the needle board 51 includes a needle board 51 that can reciprocate in the piercing direction, and a pair of support plates 52 that support the front and rear surfaces of the web 10.
【００２０】ニードルボード５１には，ウェッブ１０に
突き刺すための多数のニードル５３が固定されている。
ニードル５３は，ニードルボード１００ｃｍ２の中に５
００個の密度で固定されている。また，支持板５２に
は，ニードル用の通過穴５２０が設けられている。一対
の支持板５２の間にウェッブ１０を通過させるとともに
ニードルボード５１を往復運動させると，ウェッブ１０
にニードル５３が突き刺さり，ウェッブ１０内の繊維同
士に絡み合いが形成される。これにより，ニードル跡
が，１００ｃｍ２の中に５００個存在する無機質繊維マ
ットが形成される。A large number of needles 53 for piercing the web 10 are fixed to the needle board 51.
Needle 53, 5 in the needle board 100cm 2
It is fixed at a density of 00 pieces. Further, the support plate 52 is provided with a passage hole 520 for a needle. When the web 10 passes between the pair of support plates 52 and the needle board 51 is reciprocated, the web 10
The needle 53 penetrates into the web 10 and the fibers in the web 10 are entangled with each other. As a result, an inorganic fiber mat having 500 needle marks in 100 cm 2 is formed.
【００２１】次に，無機質繊維マットに，浸漬法により
有機成分を含浸させる。無機質繊維マット中の有機成分
の含浸量は，１．５重量％とする。有機成分としてはエ
マルジョンラテックスを用いる。これにより，保持シー
ル材を得る。次に，図４（ａ）に示すごとく，保持シー
ル材１に切断加工をして，長尺体とするとともに，その
両端に，触媒担持体３の外周を巻回したときに互いに係
合し合う凹部１１と凸部１２とを形成する。Next, the inorganic fiber mat is impregnated with an organic component by a dipping method. The impregnation amount of the organic component in the inorganic fiber mat is 1.5% by weight. Emulsion latex is used as the organic component. Thereby, a holding sealing material is obtained. Next, as shown in FIG. 4 (a), the holding sealing material 1 is cut into a long body, and the two ends are engaged with each other when the outer periphery of the catalyst carrier 3 is wound. A matching concave portion 11 and convex portion 12 are formed.
【００２２】次に，図４（ｂ）に示すごとく，保持シー
ル材１により触媒担持体３を巻回して，凹部１１と凸部
１２とを係合させる。次に，円筒状の金属シェル２の中
に，保持シール材１を巻回させた触媒担持体３を装着す
る。以上により，図４（ｃ）に示すごとく，本例の触媒
コンバーター５が得られる。Next, as shown in FIG. 4 (b), the catalyst carrier 3 is wound by the holding sealing material 1, and the concave portion 11 and the convex portion 12 are engaged. Next, the catalyst carrier 3 around which the holding sealing material 1 is wound is mounted in the cylindrical metal shell 2. As described above, the catalytic converter 5 of the present example is obtained as shown in FIG.
【００２３】保持シール材の面圧を測定するにあたって
は，１０００℃になるように３０分で昇温し，１０００
℃を１０分間保持した。１０分間の保持は，保持シール
材の温度が１０００℃になるようにした。測定治具など
の熱膨張を予め測定し補正後１０分間保持した後の荷重
（圧縮荷重）を測定した。保持シール材のサンプルサイ
ズは，２５ｍｍ×２５ｍｍとした。かかる方法により測
定した結果，保持シール材の面圧は１１０ｋＰａであっ
た。In measuring the surface pressure of the holding sealing material, the temperature was raised to 1000 ° C. in 30 minutes,
C was held for 10 minutes. The holding for 10 minutes was performed so that the temperature of the holding sealing material became 1000 ° C. The thermal expansion of the measuring jig and the like was measured in advance, and the load (compression load) after holding for 10 minutes after the correction was measured. The sample size of the holding sealing material was 25 mm × 25 mm. As a result of measurement by this method, the surface pressure of the holding sealing material was 110 kPa.
【００２４】また，触媒コンバーターを実車に搭載し，
走行試験を行った。その結果，走行時の振動によって
も，触媒担持体はガタつかず，安定して保持されてい
た。また，排気ガス浄化装置からの振動音も殆どなかっ
た。このことから，保持シール材は，高温下で，触媒担
持体を保持する力を発揮できることがわかる。Also, a catalytic converter is mounted on an actual vehicle,
A running test was performed. As a result, the catalyst carrier was stably held without rattling even by vibration during traveling. Also, there was almost no vibration noise from the exhaust gas purification device. This shows that the holding sealing material can exert a force for holding the catalyst carrier at a high temperature.
【００２５】本例においては，保持シール材に少量の有
機成分が含まれている。有機成分は保持シール材のバイ
ンダーとして働き，保持シール材の嵩高性をある程度抑
制する。したがって，保持シール材を巻回した触媒担持
体の金属シェル内への装着性が改善される。また，上記
のごとく保持シール材中の有機成分が少量であるため，
加熱時に発生する燃焼ガスが排ガス成分量を悪化させる
ことがない。In this embodiment, a small amount of an organic component is contained in the holding sealing material. The organic component acts as a binder for the holding sealing material and suppresses the bulkiness of the holding sealing material to some extent. Therefore, the mountability of the catalyst carrier around which the holding sealing material is wound into the metal shell is improved. In addition, as described above, since the organic component in the holding sealing material is small,
The combustion gas generated at the time of heating does not deteriorate the exhaust gas component amount.
【００２６】実施形態例２ 本例の触媒コンバーターにおいては，触媒保持体の外径
１３０ｍｍ，長さ１００ｍｍのハニカム状のコーディエ
ライト製モノリス体を用いた。この触媒保持体はあ，そ
の軸方向に沿って多数の角状穴が設けてあり，各穴の間
には白金などの触媒成分を担持した多孔質隔壁が配置し
ている。また，金属シェルは，ＳＵＳ３０４からなり，
クラムシェル構造を有する。Embodiment 2 In the catalytic converter of the present embodiment, a honeycomb-shaped cordierite monolith body having an outer diameter of 130 mm and a length of 100 mm of a catalyst holder was used. This catalyst support has a number of square holes along its axial direction, and a porous partition wall carrying a catalyst component such as platinum is arranged between the holes. The metal shell is made of SUS304,
It has a clamshell structure.
【００２７】本例の触媒コンバーターを製造するにあた
っては，実施形態例１と同様に触媒保持体の表面に保持
シール材を巻回し，次いで，これを，二分割されたシェ
ル部材の中に装着し，シェル部材を閉じて溶接により円
筒体の金属シェルとした。その他の点は実施形態例１と
同様である。本例においても，実施形態例１と同様の効
果を得ることができる。In manufacturing the catalytic converter of this embodiment, a holding sealing material is wound around the surface of the catalyst holding body in the same manner as in the first embodiment, and then mounted in a two-part shell member. Then, the shell member was closed to form a cylindrical metal shell by welding. Other points are the same as the first embodiment. Also in this example, the same effect as in the first embodiment can be obtained.
【００２８】実施形態例３ 本例の触媒コンバーターにおいては，金属シェルが巻き
締め構造である。触媒保持体の表面に保持シール材を巻
回した後，その表面に板厚１．５ｍｍ，幅１４１ｍｍ，
長さ１２０ｍｍの薄い金属板を複数回巻き締めた。その
他の点は実施形態例１と同様である。本例においても，
実施形態例１と同様の効果を得ることができる。Embodiment 3 In the catalytic converter of this embodiment, the metal shell has a winding structure. After the holding sealing material is wound on the surface of the catalyst holding body, a plate thickness of 1.5 mm, a width of 141 mm,
A thin metal plate having a length of 120 mm was wound several times. Other points are the same as the first embodiment. In this example,
The same effect as that of the first embodiment can be obtained.
【００２９】実験例１ 本例においては，保持シール材の中の有機成分の含有
量，ニードル跡の密度，無機質繊維マットの充填密度を
変えて，保持シール材の面圧，組み立て性，触媒保持体
の割れ，ずれの有無を測定し，また排気ガス試験を行っ
た。これらの結果を表１に示した。Experimental Example 1 In this example, the surface pressure of the holding sealing material, the assembling property, and the catalyst holding were changed by changing the content of the organic component in the holding sealing material, the density of the needle marks, and the packing density of the inorganic fiber mat. The body was checked for cracks and slippage, and an exhaust gas test was performed. The results are shown in Table 1.
【００３０】保持シール材の面圧を測定するにあたって
は，実施形態例１における面圧測定方法を用いた。触媒
保持体の割れ評価は，割れが生じた場合を×，生じなか
った場合を○とした。触媒保持体のずれ評価は，ずれが
生じた場合を×，生じなかった場合を○とした。In measuring the contact pressure of the holding sealing material, the contact pressure measuring method in the first embodiment was used. The evaluation of the crack of the catalyst support was evaluated as x when cracks occurred and as ○ when cracks did not occur. The evaluation of the shift of the catalyst holder was evaluated as x when the shift occurred, and as ○ when the shift did not occur.
【００３１】排気ガス試験は，触媒コンバーターの上流
側及び下流側に配設した酸素センサによる排気ガス制御
に対する異常の有無を評価した。無機質繊維マット中の
有機成分が多いと排気ガス制御に異常が生じ，有害ガス
が排出されてしまう。したがって，排気ガス制御に異常
が生じた場合を×，異常が生じなかった場合を○とし
た。In the exhaust gas test, the presence or absence of an abnormality in the exhaust gas control by the oxygen sensors disposed upstream and downstream of the catalytic converter was evaluated. If the amount of organic components in the inorganic fiber mat is large, an abnormality occurs in exhaust gas control, and harmful gas is discharged. Therefore, x indicates that an abnormality occurred in the exhaust gas control, and ○ indicates that no abnormality occurred.
【００３２】測定の結果，表１より明らかなように，無
機質繊維マットに，有機成分が０．１〜２重量％含まれ
ており，且つ１００ｃｍ２中に５０〜３０００個の密度
でニードルパンチング処理がされており，また充填密度
が０．１５〜０．４５ｇ／ｃｍ12である場合には，組み
立て性が良好で，また保持シール材由来の排気ガスも発
生しなかった。一方，表には示されていないが，有機成
分が０の場合には，保持シール材の繊維が飛散し，組み
立て性が悪化した。As a result of the measurement, as is apparent from Table 1, the inorganic fiber mat contains 0.1 to 2 % by weight of an organic component, and is subjected to needle punching at a density of 50 to 3000 pieces in 100 cm 2. When the packing density was 0.15 to 0.45 g / cm 12 , the assemblability was good and no exhaust gas derived from the holding sealing material was generated. On the other hand, although not shown in the table, when the organic component was 0, the fibers of the holding sealing material were scattered, and the assembling property was deteriorated.
【００３３】[0033]
【表１】 [Table 1]
【００３４】[0034]
【発明の効果】本発明によれば，金属シェル内への触媒
保持体の装着作業がしやすく，クッション性に優れた触
媒担持体用の保持シール材を用いた触媒コンバーターを
提供することができる。According to the present invention, it is possible to provide a catalytic converter using a holding sealing material for a catalyst carrier which is easy to mount the catalyst holder in the metal shell and has excellent cushioning properties. .
【図１】実施形態例１の触媒コンバーターの断面図。FIG. 1 is a cross-sectional view of a catalytic converter according to a first embodiment.
【図２】実施形態例１の触媒コンバーターの取り付け位
置を示す説明図。FIG. 2 is an explanatory diagram showing a mounting position of the catalytic converter according to the first embodiment.
【図３】実施形態例１における，ニードルパンチ装置の
説明図。FIG. 3 is an explanatory diagram of a needle punch device according to the first embodiment.
【図４】実施形態例１における，触媒コンバーターの製
造方法を示す説明図（ａ）〜（ｃ）。FIGS. 4A to 4C are diagrams illustrating a method for manufacturing a catalytic converter according to the first embodiment.
１．．．保持シール材， ２．．．金属シェル， ３．．．触媒担持体， ５．．．触媒コンバーター， 1. . . 1. holding sealing material, . . 2. metal shell; . . 4. catalyst carrier; . . Catalytic converter,
フロントページの続き Ｆターム(参考） 3G091 AA02 AB01 BA09 BA39 GA06 GB01X GB01Z GB06W GB10X GB10Z GB16Z GB17X GB19Z HA29 4D048 AA06 AA13 AA18 AB01 AB02 BA03X BA06X BA30X BA33X BA41X BA42X BB08 BB13 CA01 4G069 AA04 BA01A BA01B BA02A BA02B BA13B BC71B BC75B CA03 DA06 EA09 EA16 EA19 ED05 EE01 EE02 Continued on the front page F-term (reference) 3G091 AA02 AB01 BA09 BA39 GA06 GB01X GB01Z GB06W GB10X GB10Z GB16Z GB17X GB19Z HA29 4D048 AA06 AA13 AA18 AB01 AB02 BA03X BA06X BA30X BA33X BA41X BA42X BB08 BA01 BA01B01B01 BA03 BA01 BA03 BA01 ABA EA09 EA16 EA19 ED05 EE01 EE02
Claims (5)
う金属シェルと，上記触媒保持体と上記金属シェルとの
間に配置される保持シール材とから構成される触媒コン
バーターにおいて，上記保持シール材は，１００ｃｍ２
の中に５０〜３０００個の密度でニードルパンチング処
理がされた無機質繊維マットからなり，かつ有機質の含
有量が０を超えて大きく且つ２重量％以下であり，０．
１５〜０．４５ｇ／ｃｍ３の充填密度において３００〜
１０００℃の間に加熱したときに５〜５００ｋＰａの面
圧を発生することを特徴とする触媒コンバーター。1. A catalytic converter comprising: a catalyst holder; a metal shell that covers the outside of the catalyst holder; and a holding sealing material disposed between the catalyst holder and the metal shell. The holding sealing material is 100 cm 2
Is made of an inorganic fiber mat which has been subjected to a needle punching treatment at a density of 50 to 3000 pieces, and has a large organic content exceeding 0 and 2% by weight or less.
At a packing density of 15-0.45 g / cm 3 ,
A catalytic converter, which generates a surface pressure of 5 to 500 kPa when heated between 1000 ° C.
トは，少なくともアルミナまたはシリカを含む無機質繊
維からなることを特徴とする触媒コンバーター。2. The catalytic converter according to claim 1, wherein the inorganic fiber mat is made of an inorganic fiber containing at least alumina or silica.
ェルは，圧入構造のものであることを特徴とする触媒コ
ンバーター。3. The catalytic converter according to claim 1, wherein the metal shell has a press-fit structure.
ェルは，クラムシェル構造のものであることを特徴とす
る触媒コンバーター。4. The catalytic converter according to claim 1, wherein the metal shell has a clamshell structure.
ェルは，巻き締め構造のものであることを特徴とする触
媒コンバーター。5. The catalytic converter according to claim 1, wherein the metal shell has a winding structure.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000080376A JP2001259438A (en) | 2000-03-22 | 2000-03-22 | Catalytic converter |
| EP01915675A EP1267048B1 (en) | 2000-03-22 | 2001-03-21 | Holding and sealing mat material |
| CNB018069053A CN100386507C (en) | 2000-03-22 | 2001-03-21 | Catalyst converter and diesel particulate filter system |
| DE20122865U DE20122865U1 (en) | 1969-03-27 | 2001-03-21 | Holding and sealing mat material |
| PCT/JP2001/002248 WO2001071170A1 (en) | 2000-03-22 | 2001-03-21 | Catalyst converter and diesel particulate filter system |
| US10/221,788 US7572415B2 (en) | 2000-03-22 | 2001-03-21 | Catalyst converter and diesel, particulate filter system |
| DE60121555T DE60121555T8 (en) | 2000-03-22 | 2001-03-21 | Fixing and sealing mat material |
| KR10-2002-7012391A KR100518111B1 (en) | 2000-03-22 | 2001-03-21 | Catalyst converter and diesel particulate filter system |
| HK06104768A HK1084716A1 (en) | 2000-03-22 | 2006-04-21 | A holding and sealing mat material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000080376A JP2001259438A (en) | 2000-03-22 | 2000-03-22 | Catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001259438A true JP2001259438A (en) | 2001-09-25 |
Family
ID=18597486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000080376A Pending JP2001259438A (en) | 1969-03-27 | 2000-03-22 | Catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001259438A (en) |
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| KR100838546B1 (en) | 2006-03-10 | 2008-06-17 | 이비덴 가부시키가이샤 | Sheet member and exhaust gas purifying device |
| JP2009504968A (en) * | 2005-08-09 | 2009-02-05 | フォーレシア・システムズ・デシャップマン | Exhaust pipe |
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| CN103429865A (en) * | 2011-01-31 | 2013-12-04 | 3M创新有限公司 | Mounting member for pollution control element, manufacturing method thereof, and pollution control device |
| WO2017104642A1 (en) | 2015-12-16 | 2017-06-22 | イビデン株式会社 | Holding seal material and method for producing holding seal material |
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| WO2018235487A1 (en) * | 2017-06-23 | 2018-12-27 | 日本特殊陶業株式会社 | Gas sensor |
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| JPWO2003081001A1 (en) * | 2002-03-22 | 2005-07-28 | イビデン株式会社 | Honeycomb filter for exhaust gas purification |
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| CN103429865A (en) * | 2011-01-31 | 2013-12-04 | 3M创新有限公司 | Mounting member for pollution control element, manufacturing method thereof, and pollution control device |
| US9670814B2 (en) | 2011-01-31 | 2017-06-06 | 3M Innovative Properties Company | Mounting member for pollution control element, manufacturing method thereof, and pollution control device |
| WO2017104642A1 (en) | 2015-12-16 | 2017-06-22 | イビデン株式会社 | Holding seal material and method for producing holding seal material |
| WO2018096892A1 (en) * | 2016-11-25 | 2018-05-31 | 日本特殊陶業株式会社 | Gas sensor |
| WO2018235487A1 (en) * | 2017-06-23 | 2018-12-27 | 日本特殊陶業株式会社 | Gas sensor |
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