JP4809563B2 - Catalyst support with microstructured expandable sleeve - Google Patents

Catalyst support with microstructured expandable sleeve Download PDF

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Publication number
JP4809563B2
JP4809563B2 JP2001553511A JP2001553511A JP4809563B2 JP 4809563 B2 JP4809563 B2 JP 4809563B2 JP 2001553511 A JP2001553511 A JP 2001553511A JP 2001553511 A JP2001553511 A JP 2001553511A JP 4809563 B2 JP4809563 B2 JP 4809563B2
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sleeve
honeycomb body
plate
metal
contact
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JP2003520133A (en
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ナーゲル、トーマス
マウス、ヴォルフガング
ファウスト、ハンス‐ギュンター
ヴィーレス、ルートヴィッヒ
Original Assignee
エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング
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Priority claimed from PCT/EP2001/000315 external-priority patent/WO2001053668A1/en
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    • 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
    • F01N3/2842Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • 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
    • F01N3/2803Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807Metal other than sintered metal
    • F01N3/281Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • 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
    • F01N2330/00Structure of catalyst support or particle filter
    • F01N2330/02Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F01N2330/00Structure of catalyst support or particle filter
    • F01N2330/30Honeycomb supports characterised by their structural details
    • F01N2330/42Honeycomb supports characterised by their structural details made of three or more different sheets, foils or plates stacked one on the other
    • 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
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02Fitting monolithic blocks into the 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
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • 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
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/28Methods or apparatus for fitting, inserting or repairing different elements by using adhesive material, e.g. cement

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  • 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)
  • Catalysts (AREA)

Description

【0001】
本発明は、ハニカム体と、外被管と、両者間に配置されたスリーブとを備えた触媒コンバータ用の触媒担体とその製造方法に関する。そのような触媒コンバータは、内燃機関、特に自動車の排気装置に賞用されている。
【0002】
国際特許出願公表99/37896号明細書に、外被形ハニカム体の製造方法が記載されている。その外被形ハニカム体は、ハニカム体が排気ガスの貫流可能な通路を備えるよう、積層および/又は巻回により形成され、少なくとも部分的に微細構造化された板状金属層を有している。ハニカム体は外被管により包囲されている。ハニカム体と外被管は、それらの異なる材料特性および運転中の互いに異なる温度に基づき、異なる熱膨張挙動を示す。従って、ハニカム体の少なくとも片側終端範囲で、ハニカム体と外被管との固い結合を避けるよう配慮している。この理由から、外被形ハニカム体にスリーブが設けられている。該スリーブは、外被管とハニカム体の製造上の公差にも係らず、ハニカム体の少なくとも片側終端範囲におけるハニカム体と外被管との直接ろう付け結合が確実に避けられるようにしている。この種ハニカム体の製造時、ハニカム体とスリーブ間の幾つかの接触個所は、多少はたまたま相互に結合されても、大半の接触個所は結合されないままである。そのようにして確かに、外被管とハニカム体の間の熱応力は避けられるが、ハニカム体のスリーブへの所定の結合が達成されない。
【0003】
排気装置で触媒担体として利用されるこの種外被形ハニカム体は、熱的負荷だけでなく、動的荷重をも受ける。これは、ハニカム体の移動可能に配置された終端範囲が振動することを意味する。強固に固定されていない接触個所は緩み、固定されていない板状金属端は自由にふらつき、その結果、触媒作用層が剥離してしまう。更に、ハニカム体のこの自由にふらつく部分範囲が緩み、隣接する通路を塞いだり、隣接する排気装置の構成要素を損傷したりする危険がある。
【0004】
本発明の課題は、大きな熱的交番荷重の下でさえ外被管とハニカム体の間の熱応力を回避し、且つ例えば脈動する排気ガス流による動的荷重下での板状金属自由端や波形板状金属のふらつきを回避できる触媒担体を提供することにある。
【0005】
本発明の課題は、更にそのような触媒担体の製造方法を提供することにある。
【0006】
本発明は、この課題を請求項1に記載の触媒担体および請求項14に記載の製造方法によって解決する。有利な実施態様は各従属請求項に示す。
【0007】
本発明に基づく触媒担体は、板状金属層から成るハニカム体を備え、この板状金属層は、ハニカム体が排気ガスの貫流可能な通路を形成するよう、少なくとも一部が微細構造化される。ハニカム体は、少なくとも部分的に外被管で包囲される。その外被管は、少なくとも1つの軸方向部分範囲だけでハニカム体に接合法で結合される。なお、接合法での結合とは、接着、ろう付け、溶接等による物質的な結合を意味する。ハニカム体の軸方向長さより短寸のスリーブが、外被管の内側壁の部分に接触する。スリーブは、ハニカム体外周の端面近傍に配置する。スリーブの内周面は、本発明に基づき、その円周にわたり、ハニカム体の板状金属層の端面側半径方向外側に位置する終端範囲に、この終端範囲のふらつきを防止すべく接合法で結合する。板状金属層の半径方向外側に位置する終端範囲は、スリーブとの結合に基づき、個別の振動を生じない。この結果、大きな動的荷重下でも、触媒作用層はじっと動かないでいる。この終端範囲のハニカム体からの緩みを阻止し、この結果、触媒担体は、有害物の発生に関して最良の効果を発揮し、大きな寿命を示す。
【0008】
本発明の他の実施態様で、触媒コンバータの触媒担体は、ハニカム体が外被管に対し熱膨張した際、スリーブが移動可能な点で優れている。かくして、触媒担体の熱的負荷の下での、外被管とハニカム体の異なる熱膨張を補償する。
【0009】
スリーブを少なくともハニカム体の端面迄延ばし、板状金属層の終端範囲に結合するとよい。この結果、板状金属層の終端範囲を特に強固に固定できる。
【0010】
本発明の有利な実施態様では、スリーブが外被管の縁より突出し、スリーブの辺が、外被管の縁に鍔状に接するよう、半径方向外側に折り曲げる。かくしてハニカム体を挿入する際および/又は触媒担体の運転中に、ハニカム体が所定の挿入深さを越えて外被管内に侵入するのを阻止するストッパが生ずる。
【0011】
本発明の他の実施形態では、スリーブは少なくとも1つの微細構造を持つ。この結果、スリーブは外被管との小さな接触面を示す。これは特に、ハニカム体が熱膨張した際、スリーブが外被管に対し小さな摩擦力のため容易に移動でき、外被管とハニカム体との間の熱応力を特に良好に阻止できる点で有利である。この微細構造は、スリーブの軸方向長さにわたり少なくとも部分的に延び、好適にはその全長にわたって形成される。
【0012】
本発明の他の実施態様では、微細構造を環状に形成する。これは、微細構造をスリーブに円周方向、軸縦方向又はスパイラル状に配置することを意味する。この種微細構造は、例えばヨーロッパ特許第454712号明細書で公知である。
【0013】
本発明の他の実施態様では、例えば国際特許出願公表96/09892号明細書で知られているように、複数の微細構造が交差している。
【0014】
特に、少なくとも1つの微細構造が、半径方向外側のみ、即ち外被管にしか向かないようスリーブを形成するとよい。こうすると、部分的に単に点状の非常に小さな接触面しか生じないので、外被管へのスリーブの固着を防止できる。加えて、少なくとも部分的にハニカム体とスリーブの線状接触面が生じるので、スリーブの内周面はハニカム体に良好にろう付けできる。
【0015】
板状金属層が両側板状金属端を備えた少なくとも1つの板状金属を有し、その少なくとも1つの板状金属の少なくとも片側板状金属端がスリーブの内周面に接触する触媒担体において、本発明の他の実施態様に基づき、スリーブの内周面をそれに接する少なくとも片側板状金属端に接合法で結合する。スリーブの内周面は、それに接する全ての板状金属端に接合法で結合するとよい。
【0016】
ハニカム体の他の実施態様では、板状金属層が***部付きの構造化された少なくとも1つの板状金属を有し、その少なくとも1つの板状金属が、その***部でスリーブの内周面に接触する。本発明に基づき、スリーブの内周面に、それに接する***部を接合法で結合する。
【0017】
本発明の他の実施態様では、スリーブとハニカム体との結合部は、製造条件に伴いスリーブと外被管の間に生ずる結合より大きな強度を示す。この大きな強度は、異なる熱膨張に基づき生ずる応力を、まずスリーブと外被管との結合を断つことによって無くすることを保障する。スリーブと外被管との結合は、触媒担体の製造時、特に外被管内におけるスリーブの予備固定或いは意図しない点状の固着によって、意図的に或いは意図なしに生ずる。
【0018】
本発明の他の実施態様で、ハニカム体と外被管との間の接合による結合はろう付け結合である。特にハニカム体を外被管に高温真空ろう付けするとよい。この結合は、自動車の内燃機関の排気装置、特にエンジン近くに据え付けられた触媒担体に生ずる、極端な熱的および機械的状態にも耐える点で優れている。
【0019】
本発明は他の観点から、ハニカム体と外被管とスリーブとを備えた触媒担体の製造方法を提案する。まず、ハニカム体を、排気ガスが貫流する通路を形成するように、少なくとも部分的に構造化した板状金属層の積層および/又は巻回により公知のように形成する。続いて、外被管内にスリーブを入れ、スリーブの外周面を外被管の内側壁の部分に接触させる。その場合、スリーブが組立状態においてハニカム体の端面範囲の近くに存在するよう、スリーブを外被管内に配置するとよい。続いて、外被管の内側壁とスリーブの内周面の少なくとも1つの環状円周範囲にろう材を付ける。次に、ハニカム体を外被管とスリーブ内に入れ、ハニカム体の端面をスリーブ近傍で外被管の縁から突出させる。ハニカム体の突出した端面とその突出端面近傍の外側範囲に接着剤を着ける。ハニカム体の軸方向突出部分は、接着剤の塗布を容易にする。続いて、ハニカム体を外被管とスリーブ内に完全に入れる。そして、ハニカム体の端面側にろう材料、特にろう粉末を付着させ、ろう材を付ける。特にこの工程後、スリーブとハニカム体間でハニカム体の端面近傍の外側範囲にろう粉末が存在すると有利である。その後、ハニカム体と外被管およびハニカム体とスリーブをろう付け結合する。
【0020】
本発明に基づく方法の有利な実施態様では、スリーブをハニカム体の板状金属層の終端範囲に高温真空ろう付けする。
【0021】
本発明に基づく方法の他の実施態様では、スリーブを、ハニカム体の挿入前に外被管の内側壁に接着剤で接着する。そのために用いる接着剤は、ろう付け中に少なくとも部分的に気化する。かくして、ハニカム体と外被管の異なる熱膨張に基づき、スリーブが外被管の内側壁上を滑るのを保障する。
【0022】
特に、スリーブの辺をまず半径方向外側に曲げ、その曲げた辺を、ハニカム体を外被管とスリーブ内に完全に挿入した後、外被管の縁に接触させるとよい。これに伴い、外被管内でのハニカム体の、特に正確な軸方向固定が行える。
【0023】
以下図示の特に有利な実施例を参照して、本発明に基づく触媒担体とその製造方法の他の利点および詳細を説明する。
【0024】
図1は、端面12と軸方向長さ9を持つハニカム体1を示す。ハニカム体1の外側範囲11に軸方向部分範囲6があり、該範囲でハニカム体1は外被管5と接合法で結合している。また該外側範囲11に、板状金属端17が見えている。
【0025】
更に、スリーブ7を示している。スリーブ7の軸方向長さ8は、ハニカム体1の軸方向長さ9より短い。スリーブ7は、外周面10と内周面13と辺19とを有している。スリーブ7をハニカム体1にその端面12の近くで固定するため、スリーブ7の円周範囲20を利用する。
【0026】
外被管4は、内側壁5と端面側縁14を持つ。外被管4は、接合状態では、スリーブ7付きのハニカム体1を包囲する。
【0027】
上述した触媒担体の製造は、第1工程で、ハニカム体1を板状金属層12(図2参照)の積層および/又は巻回により製造することから始まる。スリーブ7を外被管4内に入れ、その際、スリーブ7の外周面10を外被管4の内側壁5に接触させる。外被管4の内側壁5およびスリーブ7の環状円周範囲20に、ろう材を付ける。そして、ハニカム体1を外被管4およびスリーブ7内に入れる。その場合、外被管4内でのスリーブ7の位置は、できるだけ不変であるようにせねばならない。ハニカム体1は部分的に外被管4の縁14から軸方向に突出する。ハニカム体1の突出した端面12および該端面12近傍における外側範囲11に接着剤を付ける。接着剤は、端面12並びに該端面12近くにおける板状金属端17の十分な固着を保障する。そしてハニカム体1を、外力を加えることで外被管4およびスリーブ7内に完全に入れる。特に、ハニカム体1の端面12がスリーブ7の辺19と面一に続いていると有利である。次の工程で、ハニカム体1と外被管4との間並びにハニカム体1とスリーブ7との間接合する。結合は、高温真空ろう付けにより実行するのが好ましい。
【0028】
図2は、外被管4と、スリーブ7と、板状金属層2から製造したハニカム体1とから成る本発明に基づく触媒担体を端面図で示す。金属層2は、ハニカム体1が排気ガスの貫流する通路3を形成すべく、積層および/又は巻回され、少なくとも部分的に構造化された板状金属層2を備える。この金属層2は、例えば板状金属16で形成する。その幾つかの板状金属16は***部18を有し、代表的には通常のハニカム体と同様に波形板状金属の波山を持つ。板状金属層2は、その半径方向外側に位置する終端範囲15でスリーブ7に接している。図示の実施例では、板状金属16はその板状金属端17がスリーブ7に接している。特に高温真空ろう付け過程後に、全ての板状金属端17がスリーブ7に結合していると有利である。
【0029】
このように形成した触媒担体は、熱的負荷時のハニカム体1と外被管4の異なる熱膨張を、スリーブ7がハニカム体1の端面側終端範囲15で外被管4の内側壁5上を滑ることより補償する。終端範囲15とスリーブ7との接合法による結合に基づき、板状金属層2のふらつきを防止できる。この結果、特にエンジン近傍に据え付けた際に、特に荷重の印加が可能な触媒担体が生ずる。
【0030】
図3は、微細構造21を備えたスリーブ7を製造するための板状金属22を示す。板状金属22をスリーブ7状に成形することで、互いに平行に延びる微細構造21を適当に方向付け、膨張方向を任意に定めることができる。
【0031】
図4および図5は、互いに相異なる微細構造21を備えたスリーブ用板状金属22の、別個の実施例を示す。図6は、交差微細構造22を備えたスリーブ用板状金属22を斜視図で示す。
【図面の簡単な説明】
【図1】 本発明に基づく触媒担体のハニカム体、スリーブおよび外被管の分解斜視図。
【図2】 接合された状態にある本発明に基づく触媒担体の断面図。
【図3】 微細構造を備えた板状金属の部分正面図。
【図4】 微細構造を備えた板状金属の実施例の断面図。
【図5】 微細構造を備えた板状金属の異なった実施例の断面図。
【図6】 公差する微細構造を備えたスリーブ用板状金属の部分斜視図。
【符号の説明】
1 ハニカム体
2 板状金属層
3 通路
4 外被管
5 内側壁
6 部分範囲
7 スリーブ
8 スリーブ長さ
9 ハニカム体の軸方向長さ
10 スリーブの外周面
11 ハニカム体の外側範囲
12 ハニカム体の端面
13 スリーブの内周面
14 外被管の縁
15 ハニカム体の終端範囲
16 板状金属
17 板状金属端
18 ***部
19 スリーブの辺
20 円周範囲
21 微細構造
22 スリーブ板状金属
[0001]
The present invention relates to a catalyst carrier for a catalytic converter including a honeycomb body, a jacket tube, and a sleeve disposed therebetween, and a manufacturing method thereof. Such catalytic converters are used in internal combustion engines, particularly automobile exhaust systems.
[0002]
International Patent Application Publication No. 99/37896 describes a method for manufacturing a sheath-shaped honeycomb body. The envelope-shaped honeycomb body has a plate-shaped metal layer that is formed by stacking and / or winding so that the honeycomb body has a passage through which exhaust gas can flow, and is at least partially microstructured. . The honeycomb body is surrounded by an outer tube. Honeycomb bodies and jacket tubes exhibit different thermal expansion behavior based on their different material properties and different temperatures during operation. Accordingly, consideration is given to avoiding a firm bond between the honeycomb body and the outer tube in at least one side end range of the honeycomb body. For this reason, a sleeve is provided on the envelope-shaped honeycomb body. The sleeve ensures that direct brazing connection between the honeycomb body and the jacket tube in at least one end region of the honeycomb body is avoided regardless of manufacturing tolerances of the jacket tube and the honeycomb body. During the manufacture of this type of honeycomb body, some contact points between the honeycomb body and the sleeve remain somewhat uncoupled even if they happen to be somewhat connected to each other. In this way, indeed, thermal stresses between the jacket tube and the honeycomb body are avoided, but the predetermined connection to the sleeve of the honeycomb body is not achieved.
[0003]
This kind of envelope-shaped honeycomb body used as a catalyst carrier in an exhaust device receives not only a thermal load but also a dynamic load. This means that the end range where the honeycomb body is movably disposed vibrates. The contact portion that is not firmly fixed is loosened, and the unfixed plate-like metal edge is free to flutter, and as a result, the catalytic action layer is peeled off. In addition, this free-floating partial area of the honeycomb body is loosened, and there is a risk of blocking adjacent passages and damaging adjacent exhaust system components.
[0004]
The object of the present invention is to avoid the thermal stress between the jacket tube and the honeycomb body even under a large thermal alternating load, and for example, a plate-shaped metal free end under a dynamic load due to a pulsating exhaust gas flow or An object of the present invention is to provide a catalyst carrier capable of avoiding wobbling of corrugated plate metal.
[0005]
Another object of the present invention is to provide a method for producing such a catalyst carrier.
[0006]
The present invention solves this problem by the catalyst carrier according to claim 1 and the production method according to claim 14. Advantageous embodiments are given in the respective dependent claims.
[0007]
The catalyst carrier according to the present invention comprises a honeycomb body composed of a plate-like metal layer, and this plate-like metal layer is at least partially microstructured so that the honeycomb body forms a passage through which exhaust gas can flow. . The honeycomb body is at least partially surrounded by a jacket tube. The jacket tube is joined to the honeycomb body by a joining method only in at least one axial subrange. In addition, the coupling | bonding by the joining method means the physical coupling | bonding by adhesion | attachment, brazing, welding, etc. A sleeve shorter than the axial length of the honeycomb body contacts the inner wall portion of the jacket tube. The sleeve is disposed in the vicinity of the end face on the outer periphery of the honeycomb body. In accordance with the present invention, the inner peripheral surface of the sleeve is bonded to the terminal range located radially outside the end surface side of the plate-like metal layer of the honeycomb body by the joining method over the circumference in order to prevent the terminal range from wobbling. To do. The terminal area located outside the plate-like metal layer in the radial direction does not cause individual vibrations based on the coupling with the sleeve. As a result, the catalytic action layer does not move even under a large dynamic load. This loosening of the end range from the honeycomb body is prevented, and as a result, the catalyst carrier exhibits the best effect with respect to the generation of harmful substances and exhibits a long life.
[0008]
In another embodiment of the present invention, the catalyst carrier of the catalytic converter is excellent in that the sleeve can move when the honeycomb body thermally expands with respect to the jacket tube. Thus, the different thermal expansion of the jacket tube and the honeycomb body under the thermal load of the catalyst carrier is compensated.
[0009]
The sleeve may be extended to at least the end face of the honeycomb body and bonded to the end region of the plate-like metal layer. As a result, the end range of the plate-like metal layer can be particularly firmly fixed.
[0010]
In an advantageous embodiment of the invention, the sleeve projects from the edge of the envelope tube and the side of the sleeve is bent radially outward so that it touches the edge of the envelope tube. Thus, when inserting the honeycomb body and / or during operation of the catalyst carrier, a stopper is created that prevents the honeycomb body from entering the jacket tube beyond a predetermined insertion depth.
[0011]
In other embodiments of the invention, the sleeve has at least one microstructure. As a result, the sleeve exhibits a small contact surface with the jacket tube. This is particularly advantageous in that when the honeycomb body is thermally expanded, the sleeve can be easily moved due to a small frictional force against the outer tube, and the thermal stress between the outer tube and the honeycomb body can be particularly well prevented. It is. This microstructure extends at least partially over the axial length of the sleeve and is preferably formed over its entire length.
[0012]
In another embodiment of the invention, the microstructure is formed in an annular shape. This means that the fine structure is arranged on the sleeve in a circumferential direction, an axial longitudinal direction or a spiral shape. Such a microstructure is known, for example, in EP 454712.
[0013]
In other embodiments of the present invention, a plurality of microstructures intersect, as is known, for example, in International Patent Application Publication No. 96/09892.
[0014]
In particular, the sleeve may be formed such that at least one microstructure is directed only radially outward, i.e. only to the jacket tube. In this way, only a very small contact surface in the form of a dot is produced in part, so that the sleeve can be prevented from sticking to the jacket tube. In addition, since the linear contact surface of the honeycomb body and the sleeve is generated at least partially, the inner peripheral surface of the sleeve can be satisfactorily brazed to the honeycomb body.
[0015]
In the catalyst carrier in which the plate-like metal layer has at least one plate-like metal provided with both-side plate-like metal ends, and at least one side plate-like metal end of the at least one plate-like metal contacts the inner peripheral surface of the sleeve, According to another embodiment of the present invention, the inner peripheral surface of the sleeve is bonded to at least one side plate-like metal end in contact with the inner peripheral surface by a joining method. The inner peripheral surface of the sleeve may be bonded to all the plate-like metal ends in contact with the sleeve by a bonding method.
[0016]
In another embodiment of the honeycomb body has at least one sheet metal plate-like metal layer is structured with ridges, at least one plate-shaped metal, the inner peripheral surface of the sleeve at the ridges To touch. In accordance with the present invention, the ridges in contact with the inner peripheral surface of the sleeve are joined by a joining method.
[0017]
In another embodiment of the present invention, the joint between the sleeve and the honeycomb body exhibits greater strength than the bond that occurs between the sleeve and the jacket tube with the manufacturing conditions. This great strength ensures that stresses resulting from different thermal expansions are eliminated by first breaking the connection between the sleeve and the jacket tube. The coupling between the sleeve and the jacket tube occurs intentionally or unintentionally during the production of the catalyst carrier, in particular by pre-fixing of the sleeve in the jacket tube or unintentional point sticking.
[0018]
In another embodiment of the present invention, the joint by bonding between the honeycomb body and the jacket tube is a brazed joint. In particular, the honeycomb body is preferably brazed at a high temperature in a jacket tube. This connection is excellent in withstanding the extreme thermal and mechanical conditions that occur in the exhaust systems of automotive internal combustion engines, particularly in the catalyst carrier installed near the engine.
[0019]
From another point of view, the present invention proposes a method of manufacturing a catalyst carrier including a honeycomb body, a jacket tube, and a sleeve. First, the honeycomb body, so that the exhaust gas to form a passage for flow, formed as known by lamination and / or wound at least partially structured the sheet metal layers. Subsequently, the sleeve is put in the jacket tube, and the outer peripheral surface of the sleeve is brought into contact with the inner wall portion of the jacket tube. In that case, the sleeve may be disposed in the jacket tube so that the sleeve exists in the vicinity of the end face range of the honeycomb body in the assembled state. Subsequently, a brazing material is applied to at least one annular circumferential range of the inner wall of the jacket tube and the inner peripheral surface of the sleeve. Next, the honeycomb body is put in the jacket tube and the sleeve, and the end face of the honeycomb body is projected from the edge of the jacket tube in the vicinity of the sleeve. Adhesive is applied to the projecting end face of the honeycomb body and the outer area in the vicinity of the projecting end face. The axially protruding portion of the honeycomb body facilitates application of the adhesive. Subsequently, the honeycomb body is completely placed in the jacket tube and the sleeve. Then, a brazing material, particularly a brazing powder is adhered to the end face side of the honeycomb body, and a brazing material is attached. In particular, after this step, it is advantageous if wax powder is present in the outer region in the vicinity of the end face of the honeycomb body between the sleeve and the honeycomb body. Thereafter, the honeycomb body and the jacket tube and the honeycomb body and the sleeve are brazed and joined.
[0020]
In a preferred embodiment of the method according to the invention, the sleeve is hot vacuum brazed to the end region of the plate-like metal layer of the honeycomb body.
[0021]
In another embodiment of the method according to the invention, the sleeve is glued to the inner wall of the jacket tube before insertion of the honeycomb body. The adhesive used for this is at least partially vaporized during brazing. Thus, it is ensured that the sleeve slides on the inner wall of the jacket tube based on the different thermal expansion of the honeycomb body and the jacket tube.
[0022]
In particular, the side of the sleeve is first bent radially outward, and the bent side is preferably brought into contact with the edge of the jacket tube after the honeycomb body is completely inserted into the jacket tube and the sleeve. Along with this, it is possible to fix the honeycomb body in the jacket tube particularly accurately in the axial direction.
[0023]
In the following, other advantages and details of the catalyst carrier and its production method according to the invention will be explained with reference to the particularly advantageous embodiments shown in the drawings.
[0024]
FIG. 1 shows a honeycomb body 1 having an end face 12 and an axial length 9. There is an axial direction partial range 6 in the outer range 11 of the honeycomb body 1, and the honeycomb body 1 is bonded to the jacket tube 5 by the joining method in this range. A plate-like metal edge 17 is visible in the outer area 11.
[0025]
Furthermore, a sleeve 7 is shown. The axial length 8 of the sleeve 7 is shorter than the axial length 9 of the honeycomb body 1. The sleeve 7 has an outer peripheral surface 10, an inner peripheral surface 13, and a side 19. In order to fix the sleeve 7 to the honeycomb body 1 near the end face 12, the circumferential range 20 of the sleeve 7 is used.
[0026]
The outer tube 4 has an inner wall 5 and an end face side edge 14. The outer tube 4 surrounds the honeycomb body 1 with the sleeve 7 in the joined state.
[0027]
In the first step, the above-described catalyst carrier is manufactured by manufacturing the honeycomb body 1 by laminating and / or winding the plate-like metal layer 12 (see FIG. 2). The sleeve 7 is placed in the jacket tube 4, and the outer peripheral surface 10 of the sleeve 7 is brought into contact with the inner wall 5 of the jacket tube 4. A brazing material is applied to the inner wall 5 of the outer tube 4 and the annular circumferential region 20 of the sleeve 7. Then, the honeycomb body 1 is placed in the jacket tube 4 and the sleeve 7. In that case, the position of the sleeve 7 in the jacket tube 4 must be as constant as possible. The honeycomb body 1 partially protrudes from the edge 14 of the outer tube 4 in the axial direction. Adhesive is applied to the projecting end face 12 of the honeycomb body 1 and the outer area 11 in the vicinity of the end face 12. The adhesive ensures sufficient fixing of the end surface 12 and the plate-like metal end 17 in the vicinity of the end surface 12. The honeycomb body 1 is completely put into the jacket tube 4 and the sleeve 7 by applying an external force. In particular, it is advantageous if the end face 12 of the honeycomb body 1 is flush with the side 19 of the sleeve 7. In the next step, the honeycomb body 1 and the outer tube 4 and the honeycomb body 1 and the sleeve 7 are joined. Bonding is preferably performed by high temperature vacuum brazing.
[0028]
FIG. 2 shows, in an end view, a catalyst carrier according to the invention consisting of a jacket tube 4, a sleeve 7 and a honeycomb body 1 manufactured from a plate-like metal layer 2. Metal layer 2, to form a passage 3 for the honeycomb body 1 flows through the exhaust gas, it turned stacked and / or wound, comprising a plate-like metal layer 2 which is at least partially structured. The metal layer 2 is formed of, for example, a plate metal 16. Some of the plate-like metals 16 have ridges 18 and typically have corrugated plate-like metal undulations similar to ordinary honeycomb bodies. The plate-like metal layer 2 is in contact with the sleeve 7 in the terminal area 15 located on the radially outer side. In the illustrated embodiment, the plate-like metal 16 has its plate-like metal end 17 in contact with the sleeve 7. It is advantageous if all the sheet metal ends 17 are connected to the sleeve 7, especially after the high temperature vacuum brazing process.
[0029]
The catalyst carrier thus formed causes different thermal expansions of the honeycomb body 1 and the outer tube 4 during thermal load, and the sleeve 7 is located on the inner wall 5 of the outer tube 4 in the end face side end range 15 of the honeycomb body 1. Compensate by sliding. Based on the joining of the end range 15 and the sleeve 7 by the joining method, the plate-like metal layer 2 can be prevented from wobbling. As a result, a catalyst carrier capable of applying a load is generated particularly when installed near the engine.
[0030]
FIG. 3 shows a plate-like metal 22 for producing a sleeve 7 with a microstructure 21. By forming the plate-like metal 22 into the shape of the sleeve 7, the microstructures 21 extending in parallel with each other can be appropriately oriented, and the expansion direction can be arbitrarily determined.
[0031]
4 and 5 show different embodiments of the sleeve metal plate 22 with different microstructures 21 from each other. FIG. 6 shows a perspective view of a sleeve plate metal 22 having a cross microstructure 22.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a honeycomb body, a sleeve and a jacket tube of a catalyst carrier according to the present invention.
FIG. 2 is a cross-sectional view of a catalyst carrier according to the present invention in a joined state.
FIG. 3 is a partial front view of a plate-like metal having a fine structure.
FIG. 4 is a cross-sectional view of an embodiment of a plate metal having a fine structure.
FIG. 5 is a cross-sectional view of different embodiments of a plate metal with a microstructure.
FIG. 6 is a partial perspective view of a plate metal for a sleeve having a fine structure for tolerance.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Honeycomb body 2 Plate-shaped metal layer 3 Channel | path 4 Outer tube 5 Inner side wall 6 Partial range 7 Sleeve 8 Sleeve length 9 Honeycomb body axial direction length 10 Sleeve outer peripheral surface 11 Honeycomb body outer range 12 End surface of honeycomb body 13 Inner peripheral surface of sleeve 14 Edge of outer tube 15 End range 16 of honeycomb body Plate metal 17 Plate metal end 18 Raised portion 19 Sleeve side 20 Circumferential range 21 Fine structure 22 Sleeve plate metal

Claims (12)

板状金属層(2)から成るハニカム体(1)と、ハニカム体(1)を少なくとも部分的に包囲する外被管(4)と、ハニカム体(1)の軸方向長さ(9)より短い軸方向長さ(8)のスリーブ(7)とを備え、板状金属層(2)の少なくとも一部は、ハニカム体(1)が排気ガスの貫流可能な通路(3)を形成するよう構成され、スリーブ(7)の外周面(10)が外被管(4)の内側壁(5)の部分に接触し、この接触部分を除いた少なくとも1つの軸方向部分範囲(6)だけで外被管(4)がハニカム体(1)に接合法で結合される触媒担体において、
スリーブ(7)がハニカム体(1)の外側範囲(11)に、その端面(12)に近接して配置され、スリーブ(7)の内周面(13)が、ハニカム体(1)の端面側半径方向外側に位置する板状金属層(2)の終端範囲(15)に、この終端範囲(15)のふらつきを防止すべく接合法で結合され、更に
スリーブ(7)が外被管(4)と点状又は線状に接触する少なくとも1つの微細構造(21)を有し、スリーブ(7)と外被管(4)とが小さな接触面積を有することを特徴とする触媒担体。
From a honeycomb body (1) made of a plate-like metal layer (2), an outer tube (4) that at least partially surrounds the honeycomb body (1), and an axial length (9) of the honeycomb body (1) A sleeve (7) having a short axial length (8), and at least a part of the plate-like metal layer (2) forms a passage (3) through which the honeycomb body (1) can flow exhaust gas. is configured, the outer circumferential surface of the sleeves (7) (10) is in contact with the inner portion of the wall (5) of the enveloping tube (4), by at least one axial partial region excluding the contact portions (6) In the catalyst carrier in which the outer tube (4) is bonded to the honeycomb body (1) by the joining method ,
The sleeve (7) is disposed in the outer range (11) of the honeycomb body (1) in the vicinity of the end face (12), and the inner peripheral surface (13) of the sleeve (7) is the end face of the honeycomb body (1). Bonded to the terminal area (15) of the plate-like metal layer (2) located on the outer side in the radial direction by a joining method to prevent the terminal area (15) from wobbling ,
The sleeve (7) has at least one microstructure (21) in contact with the jacket tube (4) in the form of dots or lines, and the sleeve (7) and the jacket tube (4) have a small contact area. A catalyst carrier characterized by the above.
ハニカム体(1)が外被管(4)に対して伸びた際、スリーブ(7)が移動することを特徴とする請求項1記載の担体。  The carrier according to claim 1, characterized in that the sleeve (7) moves when the honeycomb body (1) extends relative to the jacket tube (4). スリーブ(7)が、少なくともハニカム体(1)の端面(12)迄延びることを特徴とする請求項1又は2記載の担体。  The carrier according to claim 1 or 2, characterized in that the sleeve (7) extends at least to the end face (12) of the honeycomb body (1). スリーブ(7)が外被管(4)の縁(14)から突出し、スリーブ(7)の辺(19)が、外被管(4)の縁(14)に鍔状に接するように折り曲げられたことを特徴とする請求項1から3の1つに記載の担体。  The sleeve (7) protrudes from the edge (14) of the jacket tube (4), and the side (19) of the sleeve (7) is bent so as to come into contact with the edge (14) of the jacket tube (4). The carrier according to one of claims 1 to 3, characterized in that 少なくとも1つの微細構造(21)が環状に形成されたことを特徴とする請求項1から4の1つに記載の担体。5. Support according to one of claims 1 to 4, characterized in that at least one microstructure ( 21 ) is annularly formed. 複数の微細構造(21)が交差することを特徴とする請求項1から5の1つに記載の担体。6. The carrier according to claim 1, wherein a plurality of microstructures ( 21 ) intersect. 少なくとも1つの微細構造(21)が、半径方向外方のみに外被管(4)に向かうことを特徴とする請求項1から6の1つに記載の担体。7. Carrier according to one of the preceding claims, characterized in that at least one microstructure ( 21 ) is directed radially outwardly towards the envelope tube (4). 板状金属層(2)が両側板状金属端(17)を備えた少なくとも1つの板状金属(16)を有し、その少なくとも1つの板状金属(16)の少なくとも片側板状金属端(17)が、スリーブ(7)の内周面(13)に接触する請求項1から7の1つに記載の担体において、スリーブ(7)の内周面(13)が、それに接する少なくとも片側板状金属端(17)に接合法で結合されたことを特徴とする担体。The plate-like metal layer (2) has at least one plate-like metal (16) provided with both-side plate-like metal ends (17), and at least one side plate-like metal end (of the at least one plate-like metal (16) ( The carrier according to one of claims 1 to 7, wherein 17) contacts the inner peripheral surface (13) of the sleeve (7), and the inner peripheral surface (13) of the sleeve (7) is at least one side plate in contact with it. carrier, characterized in that coupled with contact legal to Jo metal end (17). 板状金属層が***部(18)付きの構造化された少なくとも1つの板状金属(16)を有し、その少なくとも1つの板状金属(16)がその***部(18)でスリーブ(7)の内周面(13)に接触する請求項1から8の1つに記載の触媒担体において、スリーブ(7)の内周面(13)が、それに接する***部(18)に接合法で結合されたことを特徴とする担体。Sheet metal layer ridge has a (18) with a structured been at least one sheet metal (16), the sleeve (7 in that at least one sheet metal (16) is the ridge (18) The catalyst carrier according to one of claims 1 to 8, wherein the inner peripheral surface (13) of the sleeve (7) is in contact with the raised portion (18) in contact with the inner peripheral surface (13). A carrier characterized by being bound. スリーブ(7)とハニカム体(1)の結合が、製造上条件づけられるスリーブ(7)と外被管(4)の間の結合よりも大きな強度を有することを特徴とする請求項1から9の1つに記載の担体。A honeycomb body sleeve (7) is coupled in (1), claim 1, characterized in that it has a greater strength than the bond between the sleeve is marked manufacturing the condition (7) and enveloping tube (4) 10. The carrier according to one of nine. ハニカム体(1)が外被管(4)にろう付けされたことを特徴とする請求項1から10の1つに記載の担体。Carrier according to one of claims 1 to 10 in which the honeycomb body (1) is characterized in that it morning brazing to the outer casing tube (4). 板状金属層(2)の端面側半径方向外側に位置する終端範囲(15)が、スリーブ(7)にその辺(19)の近くで、スリーブ内周面(13)の少なくとも1つの環状円周範囲(20)においてろう付けされたことを特徴とする請求項1から11の1つに記載の担体。At least one annular circle of the sleeve inner peripheral surface (13) has a terminal area (15) located radially outward of the end face side of the plate-like metal layer (2), near the side (19) of the sleeve (7). carrier according to one of claims 1 to 11, characterized in that that morning brazing in the circumferential range (20).
JP2001553511A 2000-01-17 2001-01-12 Catalyst support with microstructured expandable sleeve Expired - Fee Related JP4809563B2 (en)

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DE10001639.1 2000-01-17
DE10001639 2000-01-17
DE10017839.1 2000-04-11
DE10017839A DE10017839A1 (en) 2000-01-17 2000-04-11 Catalyst carrier body with a stretch sleeve with microstructures
PCT/EP2001/000315 WO2001053668A1 (en) 2000-01-17 2001-01-12 Catalyst support comprising an expandable collar provided with microstructures

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DE10328812A1 (en) * 2003-06-20 2005-01-20 Volkswagen Ag Method for manufacture of exhaust gas catalyser entails interconnecting or gluing together housing jacket, metal bed and/or metal foils, whereby metal foils are glued together and then wound into metal bed
DE102004015814A1 (en) * 2004-03-31 2005-10-20 Volkswagen Ag Exhaust gas purifying device for an internal combustion engine has an exhaust gas treatment unit (EGTU) and a tubular jacket made from a sheet metal plate for mounting the EGTU inside the jacket
DE102008016148A1 (en) * 2008-03-28 2009-10-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Honeycomb body and method for producing a soldered honeycomb body

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