JPH0719035A - Partially heating type catalytic converter - Google Patents
Partially heating type catalytic converterInfo
- Publication number
- JPH0719035A JPH0719035A JP5149432A JP14943293A JPH0719035A JP H0719035 A JPH0719035 A JP H0719035A JP 5149432 A JP5149432 A JP 5149432A JP 14943293 A JP14943293 A JP 14943293A JP H0719035 A JPH0719035 A JP H0719035A
- Authority
- JP
- Japan
- Prior art keywords
- insulating layer
- metal
- region
- catalytic converter
- catalyst 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.)
- Withdrawn
Links
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 title claims abstract description 10
- 239000011888 foil Substances 0.000 claims abstract description 47
- 239000003054 catalyst Substances 0.000 claims abstract description 42
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 230000008646 thermal stress Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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】本発明はエンジンお排気通路に設
置される通電加熱式触媒コンバータ、特にエンジンから
排出される有害物質、例えば一酸化炭素（ＣＯ）、未燃
炭化水素（ＨＣ）、酸素酸化物等を炭酸ガス、酸素、あ
るいは水分等に変換するために使用される部分加熱式の
触媒コンバータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically heated catalytic converter installed in an exhaust passage of an engine, particularly to harmful substances emitted from an engine such as carbon monoxide (CO), unburned hydrocarbon (HC), oxygen. The present invention relates to a partial heating type catalytic converter used for converting oxides and the like into carbon dioxide gas, oxygen, water and the like.
【０００２】[0002]
【従来の技術】例えば米国特許第５，０７０，６９４号
に開示されているように、薄い金属箔（通常は波箔と平
箔から成る）と絶縁層とを互いに重ねて共に渦巻状に巻
回して形成した円筒状の触媒担体と、該触媒担体を収容
する円筒形の金属ケースと、前記金属箔を通電加熱する
電源供給手段とを備えた通電加熱式触媒コンバータは従
来既に知られている。2. Description of the Related Art As disclosed in, for example, US Pat. No. 5,070,694, a thin metal foil (usually a corrugated foil and a flat foil) and an insulating layer are superposed on each other and spirally wound together. An electrically heated catalytic converter having a cylindrical catalyst carrier that is formed by turning, a cylindrical metal case that accommodates the catalyst carrier, and a power supply unit that electrically heats the metal foil is already known. .
【０００３】また、特表平３−５００９１１号公報に
は、金属箔と絶縁箔とを重ねて巻回して形成した円柱状
の触媒担体に通電して加熱せしめる通電加熱式触媒コン
バータにおいて、絶縁層は触媒担体外周まで延び、触媒
担体を円筒状ケース内に挿入して触媒担体の外周をケー
スに接合せしめるようにした通電加熱式触媒装置が開示
されている。Further, Japanese Patent Publication No. 3-500911 discloses an electrically heated catalytic converter in which a cylindrical catalyst carrier formed by stacking and winding a metal foil and an insulating foil is energized and heated. Discloses an electrically heated catalyst device that extends to the outer periphery of the catalyst carrier and inserts the catalyst carrier into a cylindrical case so that the outer periphery of the catalyst carrier is joined to the case.
【０００４】[0004]
【発明が解決しようとする課題】排ガス規制強化に対応
するためには、エンジン始動時のＨＣ，ＣＯを浄化する
必要があり、そのためには、触媒担体を短時間に触媒活
性化温度に昇温させなければならない。しかしながら、
担体の外周部まで絶縁層が延びて電流路が形成され、担
体全体を通電加熱しようとする触媒担体においては、例
えば、１００cc程度の小さな容量を１０秒以内に４００
℃まで通電加熱しようとすると、２〜３kW以上の大きな
電力が必要になり、既存のバッテリーを含めた電源系の
大型化が必須となり、重量およびコストアップや燃費悪
化を避けられないという問題がある。In order to cope with the stricter exhaust gas regulations, it is necessary to purify HC and CO at the time of engine start. For that purpose, the temperature of the catalyst carrier is raised to the catalyst activation temperature in a short time. I have to let you. However,
In a catalyst carrier in which an insulating layer extends to the outer periphery of the carrier to form a current path and the entire carrier is to be energized and heated, for example, a small capacity of about 100 cc is applied within 10 seconds.
Attempting to heat up to ℃ requires a large amount of electric power of 2 to 3 kW or more, and it is essential to increase the size of the power supply system including the existing battery, and there is a problem that weight and cost increase and fuel consumption deterioration cannot be avoided. .
【０００５】そこで、本発明は十分な耐久性、特に熱応
力に対する耐久性を有し、消費電力が少ないにもかかわ
らず、触媒加熱特性に優れた部分加熱式触媒コンバータ
を提供することを課題とする。Therefore, the present invention has an object to provide a partial heating type catalytic converter which has sufficient durability, particularly durability against thermal stress, and has excellent catalyst heating characteristics in spite of low power consumption. To do.
【０００６】[0006]
【課題を解決するための手段】上記問題点を解決するた
め請求項１によれば、エンジンの排気通路に設置される
部分加熱式触媒コンバータにおいて、中心電極の回りに
少なくとも１枚の金属箔を渦巻き状に巻回して金属触媒
担体を形成すると共に、前記中心電極から外周側に離れ
た第１領域と、該第１領域から更に外周側に離れた第２
領域の少なくとも２つの領域で前記金属箔間に絶縁層を
介在させて該絶縁層間の電流路でヒータ部を形成し、該
絶縁層の非介在領域では金属対金属で接触させて非ヒー
タ部を形成し、このようにして形成した金属触媒担体を
金属ケースに収容したことを特徴とする部分加熱式触媒
コンバータが提供される。According to a first aspect of the present invention, in a partially heated catalytic converter installed in an exhaust passage of an engine, at least one metal foil is provided around a center electrode. The metal catalyst carrier is spirally wound to form a metal catalyst carrier, and a first region separated from the center electrode to the outer peripheral side and a second region further separated from the first region to the outer peripheral side.
In at least two regions of the region, an insulating layer is interposed between the metal foils to form a heater portion in a current path between the insulating layers, and in a non-intervening region of the insulating layer, a metal-to-metal contact is made to form a non-heater portion. There is provided a partially heated catalytic converter characterized in that the formed metal catalyst carrier is housed in a metal case.
【０００７】また、請求項２によれば、第１領域におけ
る絶縁層を介した部分の絶縁層の重なり部と、第２領域
における絶縁層を介した部分の絶縁層の重なり部とを触
媒担体中心軸に対し、ほぼ対称に配置させたことを特徴
とする請求項１に記載の部分加熱式触媒コンバータが提
供される。According to a second aspect of the present invention, the catalyst carrier is provided with the overlapping portion of the insulating layer in the first region with the insulating layer interposed and the overlapping portion of the insulating layer in the second region with the insulating layer interposed. The partially heated catalytic converter according to claim 1, wherein the catalytic converter is arranged substantially symmetrically with respect to the central axis.
【０００８】[0008]
【作用】本発明によれば、触媒担体の中心部、外周部、
及び第１領域と第２領域との間の中間領域では絶縁層が
存在していないので、巻回された金属箔が金属箔どおし
で接触しており、通電すると電流が分散して電気抵抗は
非常に小さくなり、ほとんど加熱せず、非ヒータ部を形
成する。一方、絶縁層が介在している第１領域及び第２
領域では絶縁層間に電流路が形成され、電気抵抗が大き
く、これらの領域でバッテリーより供給される電力の大
部分が消費され、熱に変換されるので、ヒータ部を形成
する。このように絶縁層の介在するヒータ部を、第１領
域及び第２領域に特定することにより、熱容量が小さく
なり、消費電力／熱容量の比に比例して前記領域を急速
に加熱することができる。また、これらの第１領域及び
第２領域を互いに離すことにより、発熱が局部に集中す
るのを防止することができる。更に、大きな繰り返し熱
応力のかかる触媒担体外周部の耐熱疲労特性が向上し、
耐久性を確保することができる。According to the present invention, the central portion, outer peripheral portion, and
In addition, since the insulating layer does not exist in the intermediate region between the first region and the second region, the wound metal foil is in contact with the metal foil, and when energized, the current is dispersed and the electric current is distributed. The resistance becomes very small and hardly heats, forming a non-heater part. On the other hand, the first region and the second region in which the insulating layer is interposed
In the regions, a current path is formed between the insulating layers, the electric resistance is large, and most of the electric power supplied from the battery is consumed and converted into heat in these regions, so that the heater portion is formed. By thus specifying the heater portion with the insulating layer interposed between the first region and the second region, the heat capacity is reduced, and the region can be rapidly heated in proportion to the power consumption / heat capacity ratio. . Further, by separating the first region and the second region from each other, it is possible to prevent heat generation from concentrating locally. Furthermore, the thermal fatigue resistance of the outer periphery of the catalyst carrier, which is subjected to large cyclic thermal stress, is improved,
Durability can be secured.
【０００９】また、請求項２によれば、重なり部を対称
に位置させる為、発熱の偏りを小さくすることができ
る。Further, according to the second aspect, since the overlapping portions are positioned symmetrically, it is possible to reduce the deviation of heat generation.
【００１０】[0010]
【実施例】以下、添付図面を参照して本発明の実施例に
ついて詳細に説明する。図１及び図２は本発明によるハ
ニカム構造の部分加熱式触媒コンバータの一実施例を示
すものであって、図１はこの触媒コンバータを排気通路
の下流側より見た正面図、図２は側面図である。また、
図３は本発明による金属触媒担体を製造する方法を示し
た図である。Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show an embodiment of a partially heated catalytic converter having a honeycomb structure according to the present invention. FIG. 1 is a front view of the catalytic converter as seen from a downstream side of an exhaust passage, and FIG. 2 is a side view. It is a figure. Also,
FIG. 3 is a diagram showing a method for producing a metal catalyst carrier according to the present invention.
【００１１】棒状の中心電極１は金属棒から成り、後述
のように正の電極を構成する。図３に示すように、１枚
の薄い帯状の金属平箔２と同様に１枚の薄い帯状の金属
波板３とを互いに重ね、それらの一端を中心電極１に軸
方向にスポット溶接６等で結合される。平箔２および波
箔３は、例えば２０％Ｃｒ−５％Ａｌ−７５％Ｆｅの組
成を有し、その幅は約１７ｍｍ、板厚は約５０μｍであ
る。平箔２および各波箔３の中心電極１からの長さは等
しい。The rod-shaped center electrode 1 is made of a metal rod and constitutes a positive electrode as described later. As shown in FIG. 3, one thin strip-shaped metal flat foil 2 and one thin strip-shaped metal corrugated plate 3 are superposed on each other, and one end thereof is axially spot-welded to the center electrode 1 and the like 6. Are joined by. The flat foil 2 and the corrugated foil 3 have a composition of, for example, 20% Cr-5% Al-75% Fe, and have a width of about 17 mm and a plate thickness of about 50 μm. The flat foil 2 and each corrugated foil 3 have the same length from the center electrode 1.
【００１２】平箔２と波箔３とは互いに重ねて配列され
るが、中心電極１から外周側に離れた第１領域Ａと、こ
の第１領域Ａから更に外周側に離れた第２領域Ｂの少な
くとも２つの領域Ａ、Ｂでは、図３に示すように、平箔
２上に絶縁層４ａ、４ｂが配置される。これらの絶縁層
４ａ、４ｂも平箔２及び波箔３と同じ幅を有するが、長
さについては後述のように、巻回した状態で２巻分〜数
巻分とされる。The flat foil 2 and the corrugated foil 3 are arranged so as to be overlapped with each other, but a first area A separated from the center electrode 1 to the outer peripheral side and a second area further separated from the first area A to the outer peripheral side. In at least two regions A and B of B, insulating layers 4a and 4b are arranged on the flat foil 2 as shown in FIG. These insulating layers 4a and 4b also have the same width as the flat foil 2 and the corrugated foil 3, but the length is set to 2 to several windings in a wound state as described later.
【００１３】中心電極１を中心として平箔２及び波箔３
を、図３の矢印で示すように、巻き回すことによって図
１に示すようなハニカム構造の金属製触媒担体７を形成
する。前述のように、中心電極１から外周側に離れた第
１領域Ａと、この第１領域Ａから更に外周側に離れた第
２領域Ｂでは絶縁層４ａ、４ｂが配置されているので、
図１及び図２に示すように、中心電極１から外周側に離
れた内側リング状の第１領域Ａと、この第１領域Ａから
更に外周側に離れた外側リング状の第２領域Ｂでは、絶
縁層４ａ、４ｂに囲まれた平箔２及び波箔３の部分が渦
巻き状の電流路を形成し、ヒータ部Ａ及びＢとなる。一
方、領域Ａ及びＢ以外の領域、即ち中心電極１に近い中
心領域Ｃと、第１領域Ａ及び第２領域Ｂとの間の中間領
域Ｄと、外周領域Ｅでは、絶縁層は介在されていないた
めに、巻回された平箔２及び波箔３は直接接触した状態
で交互に巻回・積層されるので、電気抵抗は非常に小さ
な領域となり、非ヒータ部を形成する。A flat foil 2 and a corrugated foil 3 centered on the center electrode 1.
Is wound as shown by the arrow in FIG. 3 to form a metal catalyst carrier 7 having a honeycomb structure as shown in FIG. As described above, since the insulating layers 4a and 4b are arranged in the first region A distant from the center electrode 1 on the outer peripheral side and the second region B further distant from the first region A on the outer peripheral side,
As shown in FIGS. 1 and 2, an inner ring-shaped first region A separated from the center electrode 1 to the outer peripheral side and an outer ring-shaped second region B further separated from the first region A to the outer peripheral side. The portions of the flat foil 2 and the corrugated foil 3 surrounded by the insulating layers 4a and 4b form a spiral current path and serve as heater portions A and B. On the other hand, in regions other than the regions A and B, that is, in the central region C near the central electrode 1, the intermediate region D between the first region A and the second region B, and the outer peripheral region E, the insulating layer is interposed. Since the wound flat foil 2 and the corrugated foil 3 are alternately wound and laminated in a state of being in direct contact with each other, the electric resistance becomes a very small area and forms a non-heater portion.
【００１４】このように形成した金属触媒担体７に活性
アルミナ等をコーティングし触媒成分である貴金属（例
えばＰｔ，Ｐｄ，Ｒｈ等）が担持されハニカム型の部分
加熱式触媒装置を得る。更に、金属触媒担体７を金属製
の円筒状ケース８内に挿入され、担体７の外周部を例え
ばロー付けによってケース８に接合・固定し、ケース８
との間で通電可能とする。また、非ヒータ部Ｃ，Ｄ，Ｅ
において、平箔２と波箔３を含む金属箔同士は部分的に
又は全領域にわたってロー付けされる。金属ケース８自
体には負電極９が設けられる。The thus formed metal catalyst carrier 7 is coated with activated alumina or the like to carry a noble metal (eg Pt, Pd, Rh, etc.) as a catalyst component to obtain a honeycomb type partially heated catalyst device. Further, the metal catalyst carrier 7 is inserted into a metal cylindrical case 8, and the outer peripheral portion of the carrier 7 is joined and fixed to the case 8 by brazing, for example.
It is possible to energize between and. In addition, the non-heater parts C, D, E
In, the metal foils including the flat foil 2 and the corrugated foil 3 are brazed to each other partially or entirely. A negative electrode 9 is provided on the metal case 8 itself.
【００１５】図１及び図２に示す通電加熱式触媒コンバ
ータは、排気ガスが触媒担体７ないしケース８の軸線方
向に流れるように内燃機関又はタービンエンジンの排気
通路に配置され、通常、この部分加熱式触媒コンバータ
の下流の排気通路に、通電式でない主触媒装置（図示せ
ず）が配置される。よく知られているように、触媒は活
性化温度以上にならないと排ガス浄化作用を奏すること
ができない。このため、始動時のような機関冷間時にお
いて、所定時間（例えば１０秒間）加熱式触媒装置に通
電して加熱し、短時間で触媒を活性化温度以上に昇温せ
しめて排ガス中の有害成分を浄化せしめるようにしてい
る。The electric heating type catalytic converter shown in FIGS. 1 and 2 is arranged in the exhaust passage of the internal combustion engine or turbine engine so that the exhaust gas flows in the axial direction of the catalyst carrier 7 or the case 8, and normally, this partial heating is performed. A non-energized main catalyst device (not shown) is arranged in the exhaust passage downstream of the catalytic converter. As is well known, the catalyst cannot exert the exhaust gas purifying action until the temperature exceeds the activation temperature. Therefore, when the engine is cold such as at the time of start-up, the heating catalyst device is energized and heated for a predetermined time (for example, 10 seconds), and the temperature of the catalyst is raised to a temperature higher than the activation temperature in a short time to prevent harmful effects in exhaust gas. I try to purify the ingredients.
【００１６】従って、中心電極１（正電極）と負電極９
との間に電圧を印加せしめると、電流は、図１において
中心電極１側から外周側へと流れるが、触媒担体７にお
ける非ヒータ部Ｃ，Ｄ，Ｅは絶縁層がないためにほとん
ど抵抗なく流れる一方で、ヒータ領域Ａ、Ｂにおいて
は、絶縁層４ａ、４ｂによって形成された渦巻き状の電
流路を矢印で示すように流れる。従って、絶縁層４ａ、
４ｂの介在されているリング状のヒータ領域Ａ，Ｂでは
電流路が比較的長くなるために電気抵抗値が大きくな
り、通電によって発熱する。一方、絶縁層が介在せしめ
られない、触媒担体７の中心部Ｃ、ヒータ領域Ａ，Ｂ間
の領域Ｄ、及び外周領域Ｅでは電気抵抗値は小さくな
り、このため通電してもほとんど発熱しない。Therefore, the center electrode 1 (positive electrode) and the negative electrode 9
When a voltage is applied between and, current flows from the central electrode 1 side to the outer peripheral side in FIG. 1, but the non-heater portions C, D, and E of the catalyst carrier 7 have almost no resistance because there is no insulating layer. While flowing, in the heater regions A and B, the spiral current paths formed by the insulating layers 4a and 4b flow as indicated by arrows. Therefore, the insulating layer 4a,
In the ring-shaped heater regions A and B in which 4b is interposed, the current path is relatively long, so that the electric resistance value becomes large and heat is generated by energization. On the other hand, in the central portion C of the catalyst carrier 7, the region D between the heater regions A and B, and the outer peripheral region E in which the insulating layer is not interposed, the electric resistance value becomes small, and therefore, even if electricity is applied, almost no heat is generated.
【００１７】このように、図１及び図２の実施例では、
触媒担体のリング状の領域Ｃ，Ｄ，Ｅでは絶縁層が存在
しないため、これらの領域では大きな繰り返し熱応力が
かかることはなく、特に外周部では相対的に熱疲労特性
の劣る絶縁層がないので、触媒担体７の外周部全体とケ
ース８とを強固に接合することができ、かくして触媒担
体７の耐久性を向上せしめることができる。即ち、領域
Ｅのように外周部で絶縁層を切除すれば、外周部で強固
に接合し、強度を向上させることができる。また、領域
Ｃのように中心部で絶縁層を切除すれば、金属箔が巻回
によりつぶれても中心電極近傍で絶縁層が無く、電気抵
抗値が近くなるため、電力ロスを低減できる。Thus, in the embodiment of FIGS. 1 and 2,
Since the insulating layer does not exist in the ring-shaped regions C, D, E of the catalyst carrier, a large repetitive thermal stress is not applied to these regions, and there is no insulating layer having relatively poor thermal fatigue properties particularly in the outer peripheral portion. Therefore, the entire outer peripheral portion of the catalyst carrier 7 and the case 8 can be firmly bonded, and thus the durability of the catalyst carrier 7 can be improved. That is, if the insulating layer is cut off at the outer peripheral portion like the region E, the outer peripheral portion can be firmly bonded and the strength can be improved. Further, if the insulating layer is cut off at the center portion like the region C, even if the metal foil is crushed by winding, there is no insulating layer in the vicinity of the center electrode and the electric resistance value becomes close, so that power loss can be reduced.
【００１８】図１〜図３に示した上述の実施例では、内
側の絶縁層４ａの長さを２巻き分よりやや長めにし、外
側の絶縁層４ｂの長さを４巻き分よりやや短いめとした
が、これらの絶縁層の長さは形成すべきヒータ部をどれ
程度の大きさにするかによって適宜選定することができ
る。即ち、絶縁層の長さをちょうど２巻き分とすること
により絶縁層間に１周分の電流路が形成される。即ち１
周分のリング状ヒータ部が得られることとなる。もっと
も、このようなヒータ部を設ける位置が外周側よ近いほ
ど１周分でも絶縁層自体の長さは長くする必要があるこ
とは勿論である。In the above-described embodiment shown in FIGS. 1 to 3, the length of the inner insulating layer 4a is slightly longer than two turns, and the length of the outer insulating layer 4b is slightly shorter than four turns. However, the length of these insulating layers can be appropriately selected depending on the size of the heater portion to be formed. That is, by making the length of the insulating layer exactly 2 turns, a current path for one round is formed between the insulating layers. Ie 1
A ring-shaped heater portion for the circumference can be obtained. However, it goes without saying that it is necessary to increase the length of the insulating layer itself for one round as the position where such a heater portion is provided is closer to the outer circumferential side.
【００１９】図４（ａ）〜（ｃ）は、内側の絶縁層４ａ
及び外側の絶縁層４ｂをともに２巻き分とした場合を示
す。図４（ａ）は内側の絶縁層４ａと外側の絶縁層４ｂ
とを両者ともちょうど２巻き分とし、このようにして形
成されたリング状ヒータ部Ａ、Ｂの継ぎ目部分１４ａ、
１４ｂが中心電極１に関して同じ側に位置するようにし
たものである。この場合は、内側及び外側にそれぞれち
ょうど１周分のヒータ部が形成されるので良好な熱分布
の部分加熱式触媒コンバータが得られる。4A to 4C show the inner insulating layer 4a.
The case where both the outer insulating layer 4b and the outer insulating layer 4b have two turns is shown. FIG. 4A shows an inner insulating layer 4a and an outer insulating layer 4b.
And 2 are exactly two turns, and the joint portions 14a of the ring-shaped heater portions A and B formed in this manner,
14b are located on the same side with respect to the center electrode 1. In this case, since the heater portions for exactly one turn are formed on the inner side and the outer side, respectively, a partial heating type catalytic converter having a good heat distribution can be obtained.
【００２０】図４（ｂ）は内側の絶縁層４ａと外側の絶
縁層４ｂとを両者とも２巻き分よりやや長いめとし、こ
のようにして形成されたリング状ヒータ部Ａ、Ｂが部分
的に重なる、即ち部分的に２周分のヒータとなるように
しているが、これらの重なった部分２４ａ、２４ｂが中
心電極１に関して互いに反対側にくるようにしたもので
ある。この場合は、重なり部分２４ａ、２４ｂで多少発
熱が集中する部分ができるものの、それらが互いに離れ
ているので、局部的に大きな熱応力を受けることとはな
らないため、良好な熱分布の部分加熱式触媒コンバータ
が得られる。In FIG. 4B, the inner insulating layer 4a and the outer insulating layer 4b are both slightly longer than two turns, and the ring-shaped heater portions A and B thus formed are partially formed. The heaters are overlapped with each other, that is, a heater for two rounds, but these overlapped portions 24a and 24b are on opposite sides with respect to the center electrode 1. In this case, the overlapping portions 24a and 24b have portions where heat generation is concentrated, but since they are separated from each other, a large thermal stress is not locally received. A catalytic converter is obtained.
【００２１】これに対し、図４（ｃ）は内側のリング状
ヒータ部Ａと外側のリング状ヒータ部Ｂが部分的に重な
った部分３４ａ、３４ｂが中心電極１に関して同じ側に
あるので、集中発熱部が接近することとなり、局部的に
大きな熱応力を受けるおそれがあるので、できる限り避
けた方が望ましい。また、図５（ａ）に示すように、内
側のリング状ヒータ部Ａを中心電極１に近接して配置し
たり、或いは図５（ｂ）に示すように、外側のリング状
ヒータ部Ｂを外周部に配置する実施例もありうる。On the other hand, in FIG. 4 (c), since the inner ring-shaped heater portion A and the outer ring-shaped heater portion B partially overlap with each other on the same side with respect to the center electrode 1, the portions 34a and 34b are concentrated. It is desirable to avoid it as much as possible, because the heat generating parts approach each other and there is a risk of receiving large thermal stress locally. Further, as shown in FIG. 5 (a), the inner ring-shaped heater portion A is arranged close to the center electrode 1, or as shown in FIG. 5 (b), the outer ring-shaped heater portion B is arranged. There may be an embodiment in which the outer peripheral portion is arranged.
【００２２】以上のように、局部的に大きな熱応力を受
けないように、絶縁層の数、長さ、位置等を選定するこ
とができる。絶縁層を３つ以上設ければ、３箇所以上の
ヒータ部を形成できることは勿論である。また、図１〜
図３に示した実施例では、１枚の平箔２と１枚の波箔３
とを重ねて巻回しているが、複数枚の平箔２と複数枚の
波箔３とそれぞれ交互に積層して中心電極１を中心に巻
回するようにしてもよい。この場合には、絶縁層間に規
定される電流路には複数対の平箔２と波箔３が存在する
こととなる。As described above, the number, length, position, etc. of the insulating layers can be selected so as not to receive a large thermal stress locally. Of course, if three or more insulating layers are provided, three or more heater parts can be formed. In addition,
In the embodiment shown in FIG. 3, one flat foil 2 and one corrugated foil 3 are used.
However, it is also possible that a plurality of flat foils 2 and a plurality of corrugated foils 3 are alternately laminated and wound around the center electrode 1. In this case, a plurality of pairs of flat foils 2 and corrugated foils 3 are present in the current path defined between the insulating layers.
【００２３】また、図３に示すように、上述の実施例で
は、中心電極１の１つの側に軸方向に、絶縁層４ａ、４
ｂを形成した平箔２と波箔３を接合しているが、中心電
極１の左右両側に軸方向に、絶縁層４ａ、４ｂを形成し
た平箔２と波箔３をそれぞれ接合するようにしてもよ
い。ただし、この場合は、絶縁層の数、長さ、位置等は
左右対称にする必要がある。このように、触媒担体７の
直径、長さやバッテリーを含む電源系の供給電力、電圧
などの使用条件に応じて、適切な金属箔の枚数や絶縁層
の数、長さ、位置等を選択することができる。Further, as shown in FIG. 3, in the above-mentioned embodiment, the insulating layers 4a and 4a are formed on one side of the center electrode 1 in the axial direction.
Although the flat foil 2 and the corrugated foil 3 having the b formed thereon are joined together, the flat foil 2 and the corrugated foil 3 having the insulating layers 4a and 4b formed thereon are joined to the left and right sides of the center electrode 1 in the axial direction. May be. However, in this case, the number, length, position, etc. of the insulating layers need to be symmetrical. As described above, the number of metal foils, the number of insulating layers, the length, the position, etc. are selected appropriately according to the usage conditions such as the diameter and length of the catalyst carrier 7, the power supply of the power supply system including the battery, and the voltage. be able to.
【００２４】[0024]
【発明の効果】以上、説明したように、本発明では、少
なくとも２つのリング状のヒータ部Ａ，Ｂが形成され、
しかもこれらのヒータ部Ａ，Ｂが触媒担体７の中心及び
外周から離れ、且つ相互間も離れているので、触媒担体
７を加熱するために必要な電力量を大幅に低減せしめる
ことができ、触媒担体７の絶縁層４ａ、４ｂの介在領
域、即ちヒータ部Ａ，Ｂを迅速に昇温せしめることがで
きる。また、発熱が局部に集中するのを防止でき、大き
な繰り返し熱応力が局部にかかるのを防止できるので、
触媒担体の耐熱疲労特性が向上し、耐久性を確保するこ
とができる。As described above, according to the present invention, at least two ring-shaped heater portions A and B are formed,
Moreover, since these heater parts A and B are separated from the center and outer periphery of the catalyst carrier 7 and are also separated from each other, the amount of electric power required to heat the catalyst carrier 7 can be greatly reduced, and the catalyst can be significantly reduced. It is possible to quickly raise the temperature of the intervening regions of the insulating layers 4a and 4b of the carrier 7, that is, the heater portions A and B. Also, it is possible to prevent the heat generation from concentrating locally, and to prevent large repeated thermal stress from being applied locally,
The thermal fatigue resistance of the catalyst carrier is improved, and the durability can be secured.
【図１】本発明によるハニカム構造の部分加熱式触媒コ
ンバータの一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of a partially heated catalytic converter having a honeycomb structure according to the present invention.
【図２】図１に示した部分加熱式触媒コンバータの側面
図である。FIG. 2 is a side view of the partially heated catalytic converter shown in FIG.
【図３】本発明による部分加熱式触媒コンバータの製造
方法を示す概略図である。FIG. 3 is a schematic view showing a method for manufacturing a partially heated catalytic converter according to the present invention.
【図４】（ａ）〜（ｃ）は２つの絶縁層４ａ、４ｂの配
置例を示すものである。FIGS. 4A to 4C show examples of arrangement of two insulating layers 4a and 4b.
【図５】（ａ）及び（ｂ）は２つの絶縁層４ａ、４ｂの
他の配置例を示すものである。5A and 5B show another arrangement example of two insulating layers 4a and 4b.
１…中心電極 ２…平箔 ３…波箔 ４（４ａ，４ｂ）…絶縁層 ６…スポット溶接 ７…金属触媒担体 ８…金属ケース ９…負電極 Ａ，Ｂ…ヒータ領域 Ｃ，Ｄ，Ｅ…非ヒータ領域 DESCRIPTION OF SYMBOLS 1 ... Center electrode 2 ... Flat foil 3 ... Corrugated foil 4 (4a, 4b) ... Insulating layer 6 ... Spot welding 7 ... Metal catalyst carrier 8 ... Metal case 9 ... Negative electrode A, B ... Heater area C, D, E ... Non-heater area
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｊ 35/04 ３２１ Ａ 8017−4Ｇ (72)発明者 加古 卓三 東京都千代田区大手町２−６−３ 新日本 製鐵株式会社内 (72)発明者 藤野 健二 千葉県君津市君津１番地 新日本製鐵株式 会社君津製鐵所内Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location B01J 35/04 321 A 8017-4G (72) Inventor Takuzo Kako 2-6-3 Otemachi, Chiyoda-ku, Tokyo New Nippon Steel Co., Ltd. (72) Inventor Kenji Fujino 1 Kimitsu, Kimitsu-shi, Chiba New Nippon Steel Co., Ltd. Kimitsu Steel Co., Ltd.
Claims (2)
熱式触媒コンバータにおいて、中心電極の回りに少なく
とも１枚の金属箔を渦巻き状に巻回して金属触媒担体を
形成すると共に、前記中心電極の外周側の第１領域と、
該第１領域から更に外周側に離れた第２領域の少なくと
も２つの領域で前記金属箔間に絶縁層を介在させて該絶
縁層間の電流路でヒータ部を形成し、これらのヒータ部
を外周又は中心部から離し、該絶縁層の非介在領域では
金属対金属で接触させて非ヒータ部を形成し、このよう
にして形成した金属触媒担体を金属ケースに収容したこ
とを特徴とする部分加熱式触媒コンバータ。1. A partially heated catalytic converter installed in an exhaust passage of an engine, wherein at least one metal foil is spirally wound around a center electrode to form a metal catalyst carrier, and the center electrode The first region on the outer peripheral side,
An insulating layer is interposed between the metal foils in at least two regions of the second region further distant from the first region to the outer peripheral side to form a heater portion by a current path between the insulating layers, and these heater portions are surrounded by the outer periphery. Alternatively, it is separated from the central portion, and in the non-intervening region of the insulating layer, metal-to-metal contact is made to form a non-heater portion, and the metal catalyst carrier thus formed is housed in a metal case. Type catalytic converter.
絶縁層の重なり部と、第２領域における絶縁層を介した
部分の絶縁層の重なり部とを触媒担体中心軸に対し、ほ
ぼ対称に配置させたことを特徴とする請求項１に記載の
部分加熱式触媒コンバータ。2. The overlapping portion of the insulating layer in the portion where the insulating layer is interposed in the first area and the overlapping portion of the insulating layer in the portion where the insulating layer is interposed in the second area are substantially symmetrical with respect to the center axis of the catalyst carrier. The partial heating type catalytic converter according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5149432A JPH0719035A (en) | 1993-06-21 | 1993-06-21 | Partially heating type catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5149432A JPH0719035A (en) | 1993-06-21 | 1993-06-21 | Partially heating type catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0719035A true JPH0719035A (en) | 1995-01-20 |
Family
ID=15474988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5149432A Withdrawn JPH0719035A (en) | 1993-06-21 | 1993-06-21 | Partially heating type catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719035A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1218623A1 (en) * | 1999-10-05 | 2002-07-03 | Precision Combustion, Inc. | A catalytic reactor for promoting a chemical reaction on a fluid passing therethrough |
| US6491877B1 (en) | 1996-09-09 | 2002-12-10 | Framatome Anp Gmbh | Method and device for initiating a hydrogen/oxygen reaction in a reactor safety vessel |
| WO2014012174A1 (en) * | 2012-07-19 | 2014-01-23 | Vida Holdings Corp. Ltd. | Apparatus and method for engine backpressure reduction |
| US9101881B2 (en) | 2008-08-27 | 2015-08-11 | Vida Holdings Ltd. | Catalytic converter apparatus |
| CN115041017A (en) * | 2022-05-13 | 2022-09-13 | 南京都乐制冷设备有限公司 | Device and method for removing VOCs in closed area |
-
1993
- 1993-06-21 JP JP5149432A patent/JPH0719035A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6491877B1 (en) | 1996-09-09 | 2002-12-10 | Framatome Anp Gmbh | Method and device for initiating a hydrogen/oxygen reaction in a reactor safety vessel |
| KR100522558B1 (en) * | 1996-09-09 | 2005-10-19 | 프라마톰 아엔페 게엠베하 | Process and device for initiating a hydrogen-oxygen reaction in a reactor safety container |
| EP1218623A1 (en) * | 1999-10-05 | 2002-07-03 | Precision Combustion, Inc. | A catalytic reactor for promoting a chemical reaction on a fluid passing therethrough |
| EP1218623A4 (en) * | 1999-10-05 | 2002-10-24 | Precision Combustion Inc | A catalytic reactor for promoting a chemical reaction on a fluid passing therethrough |
| US9101881B2 (en) | 2008-08-27 | 2015-08-11 | Vida Holdings Ltd. | Catalytic converter apparatus |
| US9108156B2 (en) | 2008-08-27 | 2015-08-18 | Vida Holdings Ltd. | Catalytic converter apparatus |
| US9926824B2 (en) | 2008-08-27 | 2018-03-27 | Vida Fresh Air Corp. | Catalytic converter apparatus |
| WO2014012174A1 (en) * | 2012-07-19 | 2014-01-23 | Vida Holdings Corp. Ltd. | Apparatus and method for engine backpressure reduction |
| CN103917286A (en) * | 2012-07-19 | 2014-07-09 | 维达控股股份有限公司 | Apparatus and method for engine backpressure reduction |
| EP2874731A4 (en) * | 2012-07-19 | 2016-02-24 | Vida Holdings Corp Ltd | Apparatus and method for engine backpressure reduction |
| CN115041017A (en) * | 2022-05-13 | 2022-09-13 | 南京都乐制冷设备有限公司 | Device and method for removing VOCs in closed area |
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