JPH0679181A - Metal carrier for exhaust gas cleaning catalyst - Google Patents
Metal carrier for exhaust gas cleaning catalystInfo
- Publication number
- JPH0679181A JPH0679181A JP4237196A JP23719692A JPH0679181A JP H0679181 A JPH0679181 A JP H0679181A JP 4237196 A JP4237196 A JP 4237196A JP 23719692 A JP23719692 A JP 23719692A JP H0679181 A JPH0679181 A JP H0679181A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- exhaust gas
- intermediate cylinder
- outer cylinder
- metal carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 27
- 239000003054 catalyst Substances 0.000 title claims description 12
- 238000004140 cleaning Methods 0.000 title 1
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 49
- 230000004323 axial length Effects 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 5
- 230000008646 thermal stress Effects 0.000 abstract description 20
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 9
- 238000005219 brazing Methods 0.000 description 9
- 230000035882 stress Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005096 rolling process 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]
【産業上の利用分野】本発明は、内燃機関の排気ガス浄
化触媒に用いられるメタル担体に関し、詳しくは、ハニ
カム体、中間筒及び外筒の３つの構成からなるメタル担
体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal carrier used for an exhaust gas purifying catalyst of an internal combustion engine, and more particularly to a metal carrier having a honeycomb structure, an intermediate cylinder and an outer cylinder.
【０００２】[0002]
【従来の技術】排気ガス浄化触媒用メタル担体として
は、平板及び波板が重ねられてロール状に巻回されたハ
ニカム体と、そのハニカム体を収納する外筒とからなる
ものが多く用いられている。このメタル担体では、ハニ
カム体の平板と波板、及び外筒とハニカム体とは、ロウ
付け接合や拡散接合によって一体的に接合されている。2. Description of the Related Art As a metal carrier for an exhaust gas purifying catalyst, there is often used a metal carrier comprising a honeycomb body in which a flat plate and a corrugated plate are stacked and wound in a roll shape, and an outer cylinder for housing the honeycomb body. ing. In this metal carrier, the flat plate and the corrugated plate of the honeycomb body, and the outer cylinder and the honeycomb body are integrally bonded by brazing or diffusion bonding.
【０００３】ところがメタル担体では、高温の排気ガス
との接触、触媒反応による発熱、外筒からの外部への熱
の放出、ハニカム体と外筒との熱容量の差などにより、
温度の分布が生じその結果ハニカム体に熱応力が発生し
て、ハニカム体に亀裂が生じる場合があった。そこで特
開平３−１５７１３９号公報には、ハニカム体と外筒の
間に、少なくとも一端部に撓み部をもつ中間筒を介在さ
せた構成のメタル担体が開示されている。このメタル担
体によれば、ハニカム体及び外筒の径方向の膨張・収縮
により発生する熱応力は中間筒の撓み部の変形によって
吸収される。またハニカム体は一端部のみが中間筒と接
合されているので、他端は自由端となり軸方向の膨張・
収縮の動きは規制されず熱応力の発生もほとんどない。
したがって、ハニカム体に亀裂が発生するのが防止され
ている。また、中間筒の熱膨張率を、ハニカム体と外筒
の中間程度とすることが好ましいことも開示されてい
る。However, in the metal carrier, due to contact with high-temperature exhaust gas, heat generation due to catalytic reaction, release of heat from the outer cylinder to the outside, difference in heat capacity between the honeycomb body and the outer cylinder, and the like,
A temperature distribution is generated, and as a result, thermal stress is generated in the honeycomb body, which may cause cracks in the honeycomb body. Therefore, Japanese Patent Laid-Open No. 3-157139 discloses a metal carrier having a structure in which an intermediate cylinder having a bending portion at at least one end is interposed between the honeycomb body and the outer cylinder. According to this metal carrier, the thermal stress generated by the radial expansion and contraction of the honeycomb body and the outer cylinder is absorbed by the deformation of the flexible portion of the intermediate cylinder. Also, since only one end of the honeycomb body is joined to the intermediate cylinder, the other end becomes a free end and expands in the axial direction.
The contraction movement is not regulated and thermal stress is hardly generated.
Therefore, the generation of cracks in the honeycomb body is prevented. It is also disclosed that it is preferable to set the coefficient of thermal expansion of the intermediate cylinder to about the middle of the honeycomb body and the outer cylinder.
【０００４】[0004]
【発明が解決しようとする課題】ところでメタル担体に
流入する排気ガスは、乱流であり脈動も生じている。そ
のためハニカム体の上流側端面では、箔状の平板と波板
とに排気ガスからの応力による変形や破損が生じる恐れ
がある。これを防止するには、少なくともハニカム体の
上流側端面近傍では平板と波板とを接合して強度をもた
せることが好ましい。またハニカム体中央部では、熱応
力緩和の意味から、平板と波板とは未接合とすることが
望ましい。The exhaust gas flowing into the metal carrier is turbulent and also has pulsation. Therefore, on the upstream end face of the honeycomb body, the foil-shaped flat plate and the corrugated plate may be deformed or damaged due to stress from the exhaust gas. In order to prevent this, it is preferable to bond a flat plate and a corrugated plate at least in the vicinity of the upstream end face of the honeycomb body to have strength. In addition, in the central portion of the honeycomb body, it is desirable that the flat plate and the corrugated plate are not joined from the viewpoint of thermal stress relaxation.
【０００５】ところがこのようなメタル担体では、排気
ガスとの接触などにより熱が加わると、平板と波板とが
接合された接合部位の方が未接合部位よりハニカム体の
径方向の膨張量が大きくなることがわかっている。未接
合部位ではハニカム体は周方向へも変形可能なため、膨
張の方向が分散されるからである。したがって中間筒を
もつメタル担体においては、ハニカム体は接合部位であ
る上流側端面近傍で径方向に特に大きく膨張することと
なり、中間筒に接触して自由端としての有利さが解消さ
れるとともに、中間筒から応力を受けることとなって、
繰り返し熱応力が加わると亀裂などが生じる恐れがあっ
た。However, in such a metal carrier, when heat is applied due to contact with exhaust gas or the like, the amount of expansion in the radial direction of the honeycomb body is larger in the joined portion where the flat plate and the corrugated sheet are joined than in the unjoined portion. I know it will grow. This is because the honeycomb body can be deformed in the circumferential direction at the unbonded portion, and the expansion directions are dispersed. Therefore, in the metal carrier having the intermediate cylinder, the honeycomb body expands particularly greatly in the radial direction in the vicinity of the upstream end face which is the joining portion, and the advantage as the free end is eliminated by contacting the intermediate cylinder, The stress is received from the intermediate cylinder,
If thermal stress is repeatedly applied, cracks may occur.
【０００６】本発明はこのような事情に鑑みてなされた
ものであり、中間筒をもつメタル担体において、ハニカ
ム体に熱応力が加わるのを一層防止することを目的とす
る。The present invention has been made in view of the above circumstances, and an object thereof is to further prevent thermal stress from being applied to a honeycomb body in a metal carrier having an intermediate cylinder.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決する本発
明の排気ガス浄化触媒用メタル担体は、平板及び波板が
重ねられてロール状に巻回されたハニカム体と、ハニカ
ム体を収納する外筒と、ハニカム体と外筒の間に介在す
る中間筒と、からなる排気ガス浄化触媒用メタル担体で
あって、ハニカム体は少なくとも排気ガスの上流側に位
置する上流側端面近傍で平板と波板とが接合された上流
側端面近傍接合部をもち、中間筒は排気ガスの上流側に
位置する上流側端部が外筒と接合されるとともに下流側
端部がハニカム体と接合され、中間筒の軸方向の長さは
ハニカム体の軸方向の長さより短く、中間筒の上流側端
部における外筒との接合部は、ハニカム体の上流側端面
近傍接合部より下流側に位置していることを特徴とす
る。[MEANS FOR SOLVING THE PROBLEMS] An exhaust gas purifying catalyst metal carrier of the present invention which solves the above problems accommodates a honeycomb body in which a flat plate and a corrugated plate are stacked and wound in a roll shape, and a honeycomb body. A metal carrier for an exhaust gas purification catalyst, comprising an outer cylinder and an intermediate cylinder interposed between the honeycomb body and the outer cylinder, wherein the honeycomb body is a flat plate at least near an upstream end face located upstream of the exhaust gas. The corrugated plate has a joint near the upstream end face joined to the intermediate cylinder, the intermediate cylinder is joined to the outer cylinder at the upstream end located on the upstream side of the exhaust gas, and the downstream end is joined to the honeycomb body, The axial length of the intermediate cylinder is shorter than the axial length of the honeycomb body, and the joint portion with the outer cylinder at the upstream end portion of the intermediate cylinder is located on the downstream side of the upstream end face vicinity joint portion of the honeycomb body. It is characterized by
【０００８】ハニカム体は、平板と波板とを重ねた状態
でロール状に巻いて形成されている。波板は、通常平板
を波形状に曲折して形成され、通常平板と同材質で略同
一板厚を有している。この平板及び波板は、従来と同様
に例えばＡｌ−Ｃｒ−Ｆｅ合金、ステンレス鋼などから
形成される。そして限られた体積中にできるだけ多くの
ハニカム通路の面積を確保することが好ましいことか
ら、板厚は例えば０．０５ｍｍなど比較的薄いものが用
いられる。このハニカム体は、例えば波板の頂部にロウ
材が塗布された状態で平板と重ねてロール状に巻かれて
形成され、その後加熱によりロウ付けされて一体的に接
合される。また、拡散接合により一体化することもでき
る。The honeycomb body is formed by rolling a flat plate and a corrugated plate in a roll shape. The corrugated plate is usually formed by bending a flat plate into a corrugated shape, and is made of the same material as the normal flat plate and has substantially the same plate thickness. The flat plate and the corrugated plate are made of, for example, an Al—Cr—Fe alloy, stainless steel, or the like as in the conventional case. Since it is preferable to secure as many honeycomb passage areas as possible in a limited volume, a relatively thin plate having a thickness of 0.05 mm is used. This honeycomb body is formed by, for example, being rolled on a flat plate in a state where a brazing material is applied to the top of a corrugated plate, and then being brazed by heating to be integrally joined. Also, they can be integrated by diffusion bonding.
【０００９】外筒は、例えばステンレス鋼製など従来と
同様のものを用いることができ、その板厚は従来と同様
に通常１〜２ｍｍ程度である。中間筒はハニカム体と同
程度の熱膨張率を有し、ハニカム体に発生する熱応力を
吸収可能であれば、その形状は特に制限されない。例え
ば一端部または両端部に撓み部をもつ構成とすることが
できる。この撓み部としては、周方向に溝が列設された
櫛歯状の構成、あるいは周方向にスリットが列設された
構成などとすることができる。The outer cylinder may be made of stainless steel, for example, which is the same as the conventional one, and its plate thickness is usually about 1 to 2 mm as in the conventional case. The shape of the intermediate cylinder is not particularly limited as long as it has a coefficient of thermal expansion similar to that of the honeycomb body and can absorb the thermal stress generated in the honeycomb body. For example, it may be configured to have a bending portion at one end or both ends. The flexible portion may have a comb-like configuration in which grooves are arranged in the circumferential direction, or a configuration in which slits are arranged in the circumferential direction.
【００１０】中間筒は、上流側端部が外筒と接合される
とともに下流側端部がハニカム体と接合されている。こ
れによりハニカム体の径方向の膨張の応力、あるいは外
筒の収縮の応力は、中間筒の変形で吸収でき、熱応力の
発生が防止できる。本発明の最大の特徴は、中間筒の軸
方向の長さはハニカム体の軸方向の長さより短く、中間
筒の上流側端部における外筒との接合部は、ハニカム体
の上流側端面近傍接合部より下流側に位置しているとこ
ろにある。すなわちハニカム体の上流側端面近傍接合部
の外周側には中間筒は存在せず、ハニカム体は間隔を隔
てて外筒と直接対向している。これによりハニカム体と
外筒との間のクリアランスを大きく確保することがで
き、ハニカム体の径方向の膨張が規制されないので熱応
力の発生が一層防止できる。The upstream end of the intermediate cylinder is joined to the outer cylinder and the downstream end is joined to the honeycomb body. Thereby, the expansion stress in the radial direction of the honeycomb body or the contraction stress of the outer cylinder can be absorbed by the deformation of the intermediate cylinder, and the generation of thermal stress can be prevented. The greatest feature of the present invention is that the axial length of the intermediate cylinder is shorter than the axial length of the honeycomb body, and the joint between the upstream end of the intermediate cylinder and the outer cylinder is near the upstream end face of the honeycomb body. It is located downstream from the joint. That is, there is no intermediate cylinder on the outer peripheral side of the joined portion near the upstream end face of the honeycomb body, and the honeycomb body directly faces the outer cylinder with a gap. As a result, a large clearance can be secured between the honeycomb body and the outer cylinder, and the radial expansion of the honeycomb body is not regulated, so that the generation of thermal stress can be further prevented.
【００１１】[0011]
【作用】ハニカム体の排気ガス上流側に位置する上流側
端面近傍は、排気ガスの脈動などによる応力を受けるた
め、平板と波板とを接合して強度をもたせる必要があ
る。しかしこのように接合すると、平板及び波板の熱膨
張は周方向への変形では吸収されず、ほとんどが径方向
の膨張となるため、接合されていない部位に比べて径方
向の膨張量が大きい。In the vicinity of the upstream end face of the honeycomb body located on the upstream side of the exhaust gas, stress due to pulsation of the exhaust gas or the like is required. Therefore, it is necessary to join the flat plate and the corrugated plate to have strength. However, when bonded in this way, the thermal expansion of the flat plate and the corrugated plate is not absorbed by the deformation in the circumferential direction, and most of the expansion is in the radial direction. Therefore, the amount of expansion in the radial direction is larger than that in the unbonded portion. .
【００１２】そこで本発明の排気ガス浄化触媒用メタル
担体では、ハニカム体は少なくとも排気ガスの上流側に
位置する上流側端面近傍で平板と波板とが接合された上
流側端面近傍接合部をもち、中間筒の軸方向の長さはハ
ニカム体の軸方向の長さより短く、中間筒の上流側端部
における外筒との接合部は、ハニカム体の上流側端面近
傍接合部より下流側に位置するように構成されている。Therefore, in the metal carrier for an exhaust gas purifying catalyst of the present invention, the honeycomb body has a joining portion near the upstream end face where the flat plate and the corrugated plate are joined at least near the upstream end face located upstream of the exhaust gas. The axial length of the intermediate cylinder is shorter than the axial length of the honeycomb body, and the joint between the upstream end of the intermediate cylinder and the outer cylinder is located on the downstream side of the vicinity of the upstream end face of the honeycomb body. Is configured to.
【００１３】このように構成することにより、ハニカム
体の上流側端面近傍接合部の外周には中間筒が存在しな
いため、ハニカム体と外筒との間のクリアランスを大き
く確保することができる。したがって上流側端面近傍接
合部が径方向に大きく熱膨張しても、外筒との接触を回
避することができ、上流側端面近傍接合部に熱応力が作
用するのが防止される。With this structure, since the intermediate cylinder does not exist on the outer periphery of the upstream end face vicinity bonding portion of the honeycomb body, a large clearance can be secured between the honeycomb body and the outer cylinder. Therefore, even if the upstream side end face vicinity joint part is greatly thermally expanded in the radial direction, contact with the outer cylinder can be avoided, and thermal stress is prevented from acting on the upstream side end face vicinity joint part.
【００１４】また本発明の排気ガス浄化触媒用メタル担
体では、特開平３−１５７１３９号公報に開示されたも
のと同様に、ハニカム体は外筒に対して基本的に１箇所
のみの接合であるため、軸方向の熱膨張が妨げられず、
軸方向の熱応力の発生も防止されている。Further, in the exhaust gas purifying catalyst metal carrier of the present invention, the honeycomb body is basically joined to the outer cylinder at only one location, as in the case disclosed in JP-A-3-157139. Therefore, thermal expansion in the axial direction is not hindered,
Generation of thermal stress in the axial direction is also prevented.
【００１５】[0015]
【実施例】以下、実施例により具体的に説明する。図１
に本発明の一実施例のメタル担体の断面図を示す。この
メタル担体は、板厚０．０５ｍｍのＦｅ−Ｃｒ−Ａｌ合
金製の平板と波板とが重ねられロール状に巻かれて形成
されたハニカム体１と、ハニカム体１と同程度の熱膨張
率を有し板厚０．３〜１ｍｍの中間筒２と、板厚１〜２
ｍｍのフェライト系ステンレス鋼製の外筒３とから構成
されている。EXAMPLES The present invention will be specifically described below with reference to examples. Figure 1
A sectional view of a metal carrier according to an embodiment of the present invention is shown in FIG. This metal carrier has a honeycomb body 1 formed by laminating a flat plate made of a Fe—Cr—Al alloy having a plate thickness of 0.05 mm and a corrugated plate and wound in a roll shape, and a thermal expansion of the same degree as that of the honeycomb body 1. And an intermediate cylinder 2 having a thickness of 0.3 to 1 mm and a thickness of 1 to 2
mm of ferritic stainless steel outer cylinder 3.
【００１６】ハニカム体１は、排気ガスの上流側に位置
する上流側端面近傍に、平板と波板とが接合された上流
側端面近傍接合部１０が形成され、下流側端面近傍に下
流側端面近傍接合部１１が形成されている。これらの中
間の中央部では、平板と波板とは接合されておらず、熱
応力が作用するのが防止されている。中間筒２は、図２
に示すように両端に周方向に間隔を隔てて列設された軸
方向に延びる複数の撓み溝２０をもち、この撓み溝２０
の存在により両端に撓み部２１が形成されている。撓み
部２１では、撓み溝２０の幅の拡大・縮小により拡径・
縮径が容易となっている。In the honeycomb body 1, an upstream end face vicinity joint 10 in which a flat plate and a corrugated plate are joined is formed near the upstream end face located upstream of the exhaust gas, and a downstream end face is formed near the downstream end face. The near junction 11 is formed. In the middle part between these, the flat plate and the corrugated plate are not joined, and thermal stress is prevented from acting. The intermediate cylinder 2 is shown in FIG.
As shown in FIG. 3, the plurality of axially extending bending grooves 20 are provided at both ends of the bending groove 20 at intervals in the circumferential direction.
Due to the existence of the above, the flexible portions 21 are formed at both ends. In the bending portion 21, the diameter of the bending groove 20 is increased or decreased by increasing or decreasing the width of the bending groove 20.
The diameter can be easily reduced.
【００１７】そして、中間筒２の上流側端部２２の外周
面（図２斜線部）と外筒３の内周面とが、上流側ロウ付
け部４０により接合され、ハニカム体１の下流側端面近
傍接合部１１の外周面と中間筒２の下流側端部２３の内
周面とが、下流側ロウ付け部４１により接合されてい
る。このように片持ち状に接合することで、ハニカム体
１の膨張・収縮の動きが妨げられず、熱応力の発生が防
止されている。The outer peripheral surface of the upstream end 22 of the intermediate cylinder 2 (the hatched portion in FIG. 2) and the inner peripheral surface of the outer cylinder 3 are joined by the upstream brazing portion 40, and the downstream side of the honeycomb body 1 is joined. The outer peripheral surface of the end surface vicinity joint portion 11 and the inner peripheral surface of the downstream end portion 23 of the intermediate cylinder 2 are joined by the downstream brazing portion 41. By joining in a cantilever manner in this way, the expansion and contraction movements of the honeycomb body 1 are not hindered, and the generation of thermal stress is prevented.
【００１８】ハニカム体１と外筒３の軸長は同一であ
り、中間筒２の軸長はハニカム体１より短くされてい
る。そして中間筒２の下流側端部２３の端面とハニカム
体１及び外筒３の下流側端面とは同一平面にあって一致
している。すなわち、中間筒２の上流側端部２２の端面
は、ハニカム体１及び外筒２の上流側端面より内部に位
置し、ハニカム体１の上流側端面近傍接合部１０の外周
には中間筒２が存在せず、ハニカム体１と外筒３の間に
筒状の空間５が形成されている。The honeycomb body 1 and the outer cylinder 3 have the same axial length, and the intermediate cylinder 2 has an axial length shorter than that of the honeycomb body 1. The end surface of the downstream end 23 of the intermediate cylinder 2 and the downstream end surfaces of the honeycomb body 1 and the outer cylinder 3 are on the same plane and coincide with each other. That is, the end surface of the upstream end portion 22 of the intermediate cylinder 2 is located inside the upstream end surfaces of the honeycomb body 1 and the outer cylinder 2, and the intermediate cylinder 2 is provided on the outer periphery of the upstream end face vicinity bonding portion 10 of the honeycomb body 1. Does not exist, and a cylindrical space 5 is formed between the honeycomb body 1 and the outer cylinder 3.
【００１９】この空間５におけるハニカム体１と外筒３
との距離は、中間筒２の厚さに上流側ロウ付け部４０と
下流側ロウ付け部４１の厚さを加えたものとなり、使用
時にハニカム体１の上流側端面近傍接合部１０の径が熱
膨張しても、外筒３との当接が生じない充分な大きさと
なっている。すなわち本実施例のメタル担体によれば、
ハニカム体１は上流側端面近傍接合部１０により排気ガ
スの脈動などの外力に対抗する充分な強度を有してい
る。そして上流側端面近傍接合部１０が径方向に大きく
熱膨張しても、空間５の存在により外筒３との当接が防
止されているので、上流側端面近傍接合部１０に熱応力
が作用するのが防止されている。The honeycomb body 1 and the outer cylinder 3 in this space 5
Is the sum of the thickness of the intermediate cylinder 2 and the thicknesses of the upstream brazing portion 40 and the downstream brazing portion 41, and the diameter of the upstream end face vicinity bonding portion 10 of the honeycomb body 1 when used is It is of a sufficient size that it does not come into contact with the outer cylinder 3 even if it thermally expands. That is, according to the metal carrier of this embodiment,
The honeycomb body 1 has sufficient strength against the external force such as pulsation of exhaust gas due to the joint portion 10 near the upstream end surface. Even if the upstream end face vicinity joint 10 is greatly expanded in the radial direction, contact with the outer cylinder 3 is prevented by the presence of the space 5, so that thermal stress acts on the upstream end face vicinity joint 10. Is prevented.
【００２０】またハニカム体１の中央部分は、平板と波
板とが未接合であるため、たとえ膨張して中間筒２に当
接したとしても熱応力は平板と波板の相対移動などで吸
収される。さらに、下流側端面近傍接合部１１は中間筒
２に接合されているが、下流側端面近傍接合部１１の熱
膨張は、撓み部２１の変形により吸収され熱応力の発生
が防止される。Further, in the central portion of the honeycomb body 1, since the flat plate and the corrugated plate are not joined, the thermal stress is absorbed by the relative movement of the flat plate and the corrugated plate even if they expand and come into contact with the intermediate cylinder 2. To be done. Further, the downstream end face vicinity joint portion 11 is joined to the intermediate cylinder 2, but the thermal expansion of the downstream end face vicinity joint portion 11 is absorbed by the deformation of the bending portion 21 and the generation of thermal stress is prevented.
【００２１】そしてハニカム体１は下流側ロウ付け部４
１でのみ中間筒２に接合され、中間筒２は上流側ロウ付
け部４０でのみ外筒３に接合されている。したがってハ
ニカム体１は軸方向に自由に伸縮可能であるため、軸方
向の熱応力の発生も防止されている。Then, the honeycomb body 1 has a downstream brazing portion 4
1 is joined to the intermediate cylinder 2, and the intermediate cylinder 2 is joined to the outer cylinder 3 only at the upstream brazing portion 40. Therefore, since the honeycomb body 1 can freely expand and contract in the axial direction, generation of thermal stress in the axial direction is also prevented.
【００２２】[0022]
【発明の効果】すなわち本発明の排気ガス浄化触媒用メ
タル担体によれば、従来のメタル担体に比べて熱応力の
発生が一段と防止されているため、ハニカム体の亀裂の
発生などを一層防止することができ、さらに長寿命とな
る。According to the metal carrier for exhaust gas purifying catalyst of the present invention, the generation of thermal stress is further prevented as compared with the conventional metal carrier, so that the generation of cracks in the honeycomb body is further prevented. It is possible to have a longer life.
【図１】本発明の一実施例の排気ガス浄化触媒用メタル
担体の縦断面図である。FIG. 1 is a vertical sectional view of a metal carrier for an exhaust gas purification catalyst according to an embodiment of the present invention.
【図２】本発明の一実施例の排気ガス浄化触媒用メタル
担体の構成を説明する斜視図である。FIG. 2 is a perspective view illustrating the configuration of an exhaust gas purification catalyst metal carrier according to an embodiment of the present invention.
１：ハニカム体 ２：中間筒
３：外筒 １０：上流側端面近傍接合部 ４０，４１：ロウ付
け部1: Honeycomb body 2: Intermediate tube
3: Outer cylinder 10: Upstream side end face vicinity joining part 40, 41: Brazing part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 敬三 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Keizo Tanaka 1 Toyota-cho, Toyota-shi, Aichi Toyota Automobile Co., Ltd.
Claims (1)
回されたハニカム体と、該ハニカム体を収納する外筒
と、該ハニカム体と該外筒の間に介在する中間筒と、か
らなる排気ガス浄化触媒用メタル担体であって、 該ハニカム体は少なくとも排気ガスの上流側に位置する
上流側端面近傍で該平板と該波板とが接合された上流側
端面近傍接合部をもち、 該中間筒は排気ガスの上流側に位置する上流側端部が該
外筒と接合されるとともに下流側端部が該ハニカム体と
接合され、 該中間筒の軸方向の長さは該ハニカム体の軸方向の長さ
より短く、該中間筒の該上流側端部における該外筒との
接合部は、該ハニカム体の該上流側端面近傍接合部より
下流側に位置していることを特徴とする排気ガス浄化触
媒用メタル担体。1. A honeycomb body in which flat plates and corrugated plates are stacked and wound in a roll shape, an outer cylinder for housing the honeycomb body, and an intermediate cylinder interposed between the honeycomb body and the outer cylinder. A metal carrier for an exhaust gas purification catalyst, which comprises a honeycomb body having a joint near the upstream end face where the flat plate and the corrugated plate are joined at least near the upstream end face located upstream of the exhaust gas. The upstream end of the intermediate cylinder, which is located on the upstream side of the exhaust gas, is joined to the outer cylinder and the downstream end is joined to the honeycomb body, and the axial length of the intermediate cylinder is the honeycomb. It is shorter than the axial length of the body, and the joint between the upstream end of the intermediate cylinder and the outer cylinder is located downstream of the vicinity of the upstream end face of the honeycomb body. A metal carrier for an exhaust gas purification catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23719692A JP3271716B2 (en) | 1992-09-04 | 1992-09-04 | Metal carrier for exhaust gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23719692A JP3271716B2 (en) | 1992-09-04 | 1992-09-04 | Metal carrier for exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0679181A true JPH0679181A (en) | 1994-03-22 |
| JP3271716B2 JP3271716B2 (en) | 2002-04-08 |
Family
ID=17011799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23719692A Expired - Fee Related JP3271716B2 (en) | 1992-09-04 | 1992-09-04 | Metal carrier for exhaust gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3271716B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851496A (en) * | 1996-01-26 | 1998-12-22 | Toyota Jidosha Kabushiki Kaisha | Catalytic device for cleaning exhaust gases of an internal combustion engine |
| JP2008110336A (en) * | 2006-10-05 | 2008-05-15 | Cataler Corp | Metallic honeycomb carrier for catalyst for cleaning exhaust gas |
| JP2008533371A (en) * | 2005-03-16 | 2008-08-21 | 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 | Housing with enhanced bushing for exhaust treatment components |
| WO2020209225A1 (en) * | 2019-04-11 | 2020-10-15 | 本田技研工業株式会社 | Catalyst device |
-
1992
- 1992-09-04 JP JP23719692A patent/JP3271716B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851496A (en) * | 1996-01-26 | 1998-12-22 | Toyota Jidosha Kabushiki Kaisha | Catalytic device for cleaning exhaust gases of an internal combustion engine |
| JP2008533371A (en) * | 2005-03-16 | 2008-08-21 | 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 | Housing with enhanced bushing for exhaust treatment components |
| US8110153B2 (en) | 2005-03-16 | 2012-02-07 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Housing for an exhaust gas treatment component with a reinforcing sleeve, exhaust gas treatment component, exhaust system and motor vehicle |
| JP2008110336A (en) * | 2006-10-05 | 2008-05-15 | Cataler Corp | Metallic honeycomb carrier for catalyst for cleaning exhaust gas |
| WO2020209225A1 (en) * | 2019-04-11 | 2020-10-15 | 本田技研工業株式会社 | Catalyst device |
| JPWO2020209225A1 (en) * | 2019-04-11 | 2020-10-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3271716B2 (en) | 2002-04-08 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |