JPH07197808A - Electric heating type catalytic device for controlling exhaust emission - Google Patents
Electric heating type catalytic device for controlling exhaust emissionInfo
- Publication number
- JPH07197808A JPH07197808A JP5352156A JP35215693A JPH07197808A JP H07197808 A JPH07197808 A JP H07197808A JP 5352156 A JP5352156 A JP 5352156A JP 35215693 A JP35215693 A JP 35215693A JP H07197808 A JPH07197808 A JP H07197808A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- catalyst
- catalyst carrier
- heating
- heat generating
- 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- Withdrawn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 abstract description 6
- 238000005485 electric heating Methods 0.000 title abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 77
- 239000004020 conductor Substances 0.000 claims abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 42
- 230000004913 activation Effects 0.000 abstract description 5
- 239000011888 foil Substances 0.000 description 14
- 230000002093 peripheral effect Effects 0.000 description 14
- 239000002184 metal Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003863 metallic catalyst Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
- F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は排気ガス浄化用電気加熱
式触媒装置に関する。この種の触媒装置は、排気ガス中
に含まれるＣＯ，ＨＣ等の有害成分を完全燃焼させて排
気ガスを浄化する場合において、内燃機関の冷間時に所
定温度以上で作用する触媒の機能を活性化するべく昇温
するのに使用される。特に、本発明は部分加熱式の触媒
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically heated catalytic converter for purifying exhaust gas. This type of catalyst device activates the function of the catalyst that operates at a predetermined temperature or higher when the internal combustion engine is cold when the exhaust gas is purified by completely burning harmful components such as CO and HC contained in the exhaust gas. It is used to raise the temperature to change. In particular, the present invention relates to a partially heated catalyst device.
【０００２】[0002]
【従来の技術】特開平５−１７９９３９号公報には、部
分加熱式触媒装置が開示され、両面に絶縁皮膜が形成さ
れた波箔と平箔とを重ねて巻き込んで円筒状の金属製触
媒担体を形成し、触媒担体の中心部領域及び外周部領域
では波箔と平箔とが通電可能に接合され、その他の領域
では非接合領域とされ、非接合領域における単位面積当
りの触媒担持量を接合領域における単位面積当りの触媒
担持量より増大せしめ、発熱領域において触媒活性化温
度まで昇温する時間を短縮すると共に加熱に必要な電力
量を低減し、触媒担持量の増大による大幅なコストアッ
プを防止するようにしている。2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 5-179939 discloses a partial heating type catalyst device, in which a corrugated foil having an insulating film formed on both sides and a flat foil are superposed and wound to form a cylindrical metal catalyst carrier. And the corrugated foil and the flat foil are electrically connected to each other in the central region and the outer peripheral region of the catalyst carrier, and are non-bonded regions in the other regions, and the catalyst loading amount per unit area in the non-bonded region is By increasing the amount of catalyst supported per unit area in the bonding area, shortening the time to heat up to the catalyst activation temperature in the heat generation area and reducing the amount of electric power required for heating, a large cost increase due to an increase in the amount of catalyst supported I try to prevent it.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
特開平５−１７９９３９号公報に記載の円筒状の金属製
触媒装置においては、円筒状に発熱部に流入する排気ガ
スはハニカム状の各通路に流入後、そのまま触媒装置の
下流から排出され、発熱部下流への熱伝達には優れてい
るものの、発熱部の径方向へは、加熱された排気の流れ
は無く、熱伝達が劣るという問題があった。However, in the cylindrical metallic catalyst device described in the above-mentioned Japanese Patent Laid-Open No. 5-179939, the exhaust gas flowing into the heat generating portion in a cylindrical shape is passed through each honeycomb-shaped passage. After flowing in, it is discharged from the downstream of the catalyst device as it is, and although it is excellent in heat transfer to the downstream of the heat generating part, there is no flow of heated exhaust gas in the radial direction of the heat generating part, resulting in poor heat transfer. there were.
【０００４】そこで、本発明は、触媒担体の発熱部から
非発熱部への熱伝達を向上させ、非発熱部にむける触媒
の活性化を促進するようにした排気ガス浄化用電気加熱
式触媒装置を提供することを目的とする。Therefore, the present invention provides an electrically heated catalyst device for purifying exhaust gas, which improves heat transfer from a heat generating portion to a non-heat generating portion of a catalyst carrier and promotes activation of the catalyst toward the non-heat generating portion. The purpose is to provide.
【０００５】[0005]
【課題を解決するための手段】請求項１によれば、導電
材料より成り、部分的に発熱部を形成した触媒担体を有
する電気加熱式触媒装置において、発熱部から非発熱部
に排気ガスを偏向する第１排気ガス流偏向手段を触媒担
体の内部に設けたことを特徴とする排気ガス浄化用電気
加熱式触媒装置が提供される。According to a first aspect of the present invention, there is provided an electrically heated catalytic device having a catalyst carrier which is made of a conductive material and partially has a heat generating portion, and exhaust gas is discharged from the heat generating portion to the non-heat generating portion. There is provided an electrically heated catalyst device for purifying exhaust gas, wherein a first exhaust gas flow deflecting means for deflecting is provided inside a catalyst carrier.
【０００６】請求項２によれば、請求項１において、発
熱部を触媒担体の排気上流端より下流に設けると共に、
発熱部より排気上流側に、排気ガスを発熱部に偏向する
第２排気ガス流偏向手段を触媒担体の内部に設けたこと
を特徴とする請求項１に記載の電気加熱式触媒装置が提
供される。According to a second aspect, in the first aspect, the heat generating portion is provided downstream from the exhaust upstream end of the catalyst carrier, and
The electrically heated catalyst device according to claim 1, wherein a second exhaust gas flow deflecting means for deflecting the exhaust gas to the heat generating portion is provided inside the catalyst carrier on the exhaust upstream side of the heat generating portion. It
【０００７】[0007]
【作用】請求項１によれば、部分的に形成された発熱部
が通電時には先に昇温する。尚、発熱部は部分的に形成
されるため昇温は速い。そして、第１排気ガス流偏向手
段により発熱部から非発熱部に向けて、排気ガスが流入
するので、発熱部の電気加熱による熱と、昇温活性化さ
れた触媒の反応熱の非発熱部への熱伝達が向上し、非発
熱部における触媒が活性化し易い。According to the first aspect of the present invention, the partially formed heat generating portion first rises in temperature when energized. Since the heat generating portion is partially formed, the temperature rise is fast. Then, since the exhaust gas flows from the heat generating part toward the non-heat generating part by the first exhaust gas flow deflecting means, the heat generated by the electric heating of the heat generating part and the non-heat generating part of the reaction heat of the temperature-activated catalyst are generated. Heat transfer to the catalyst is improved, and the catalyst in the non-heat generating portion is easily activated.
【０００８】請求項２によれば、更に、第２排気ガス流
偏向手段により、発熱部より排気上流側の非発熱部から
の排気ガスが偏向されて、発熱部に集中し、高温排気ガ
スによる発熱部の昇温作用が向上する。According to the second aspect, the exhaust gas from the non-heat generating portion on the exhaust upstream side of the heat generating portion is deflected by the second exhaust gas flow deflecting means and is concentrated on the heat generating portion. The temperature raising action of the heat generating portion is improved.
【０００９】[0009]
【実施例】図１（ａ）〜（ｄ）、図２、及び図３を参照
して本発明の第１の実施例について説明する。まず図１
（ａ）〜（ｄ）を参照すると棒状の正電極１に溶接した
金属製の薄い平板２ａと波板２ｂの対が重ねて巻きこま
れて、図１（ｄ）に示すような、渦巻状の層を形成しハ
ニカム状の金属製触媒担体２が形成される。この金属製
触媒担体２の上流端側の一部、即ち円筒状触媒担体２の
中心領域と外周領域との間のドーナツ状の中間領域には
加熱部３が形成される。EXAMPLE A first example of the present invention will be described with reference to FIGS. 1 (a) to 1 (d), FIG. 2 and FIG. Figure 1
Referring to (a) to (d), a pair of a metal thin flat plate 2a and a corrugated plate 2b welded to a rod-shaped positive electrode 1 are superposed and wound into a spiral shape as shown in FIG. 1 (d). The layers are formed to form the honeycomb-shaped metal catalyst carrier 2. A heating portion 3 is formed in a part of the upstream end side of the metallic catalyst carrier 2, that is, in a doughnut-shaped intermediate region between the central region and the outer peripheral region of the cylindrical catalyst carrier 2.
【００１０】このような加熱部３は前述の先行技術であ
る特開平５−１７９９３９号公報に開示されているよう
に、巻回した平板２ａ、波板２ｂから成る金属箔の積層
体において加熱しようとする領域にて相互に電気的導通
をとると共に、その他の非発熱領域では積層体を構成す
る金属箔が互いに酸化皮膜等で絶縁されるようにするこ
とによって形成できる。Such a heating unit 3 will be heated in a laminated body of metal foil composed of a rolled flat plate 2a and a corrugated plate 2b, as disclosed in the above-mentioned prior art Japanese Patent Laid-Open No. 5-179939. It can be formed by electrically connecting to each other in the region to be formed, and in the other non-heat generating regions, the metal foils constituting the laminate are insulated from each other by an oxide film or the like.
【００１１】触媒担体３の中心には、その軸線方向に沿
って棒状の正電極１が配置され、この正電極１は触媒担
体２に通電可能に接続される。触媒担体２は金属製の円
筒状ケース４内に挿入されて例えばロー付けによってケ
ース４に固定されており、これにより触媒担体２はグラ
ンド（負）電極を構成するケース４と通電可能とされて
いる。正電極１はケース４の排気上流側へ軸線方向に延
びた後Ｌ字状に曲げられてケース４の半径方向に延び、
ケース４側面を貫通している。正電極１は絶縁材５によ
ってケース４と電気的に絶縁される。触媒担体２を加熱
するときは、電極１，４間に電源７により電圧が印加さ
れる。At the center of the catalyst carrier 3, a rod-shaped positive electrode 1 is arranged along the axial direction thereof, and the positive electrode 1 is connected to the catalyst carrier 2 so as to be able to conduct electricity. The catalyst carrier 2 is inserted into a metal cylindrical case 4 and fixed to the case 4 by brazing, for example, so that the catalyst carrier 2 can be electrically connected to the case 4 constituting the ground (negative) electrode. There is. The positive electrode 1 extends in the axial direction toward the exhaust gas upstream side of the case 4 and is then bent in an L shape to extend in the radial direction of the case 4.
It penetrates the case 4 side surface. The positive electrode 1 is electrically insulated from the case 4 by the insulating material 5. When heating the catalyst carrier 2, a voltage is applied between the electrodes 1 and 4 by the power supply 7.
【００１２】ドーナツ状の加熱部３に対応する下流側の
領域であって、加熱部３と同じか又はそれより広い領域
（図１では加熱部３と同じ領域）Ａでは、図１（ｂ）及
び（ｃ）に示すように、平板２ａのみが巻回されて成
り、この領域Ａの平板２ａには箔の一部が折り返されて
成る複数のルーバ６ａ，６ｂが設けられている。領域Ａ
における外周側のルーバ６ａは、図１（ｂ）に示すよう
に、箔の一部が内側に折返されて内側セルの排気ガスの
流れを外側に誘導する様に、また内周側のルーバ６ｂ
は、図１（ｃ）に示すように、箔の一部が外側に折返さ
れて外側セルの排気ガスの流れを内側に誘導する様に設
けられている。In the downstream region corresponding to the doughnut-shaped heating unit 3, which is the same as or wider than the heating unit 3 (the same region as the heating unit 3 in FIG. 1) A, FIG. As shown in (c), only the flat plate 2a is wound, and the flat plate 2a in the region A is provided with a plurality of louvers 6a, 6b in which a part of the foil is folded back. Area A
As shown in FIG. 1 (b), the louver 6 a on the outer peripheral side of the louver 6 b on the inner peripheral side is configured so that a part of the foil is folded back to guide the exhaust gas flow of the inner cells to the outer side.
As shown in FIG. 1C, a part of the foil is folded back to guide the exhaust gas flow in the outer cells to the inside.
【００１３】図１（ａ）に示す通電加熱式触媒装置は内
燃機関の排気通路２０に配置され、この通電加熱式触媒
装置下流の排気通路に主触媒装置が配置される。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、機関冷間時においては通電加
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 electrically heated catalyst device shown in FIG. 1 (a) is arranged in the exhaust passage 20 of the internal combustion engine, and the main catalyst device is arranged in the exhaust passage downstream of the electrically heated catalyst device. The catalyst cannot exert the exhaust gas purifying action unless it becomes higher than the activation temperature. For this reason, when the engine is cold, the electric heating type catalyst device is energized and heated to raise the temperature of the catalyst above the activation temperature in a short time to purify harmful components in the exhaust gas.
【００１４】図１に示す様に排気通路に配置された触媒
装置には、排気ガス５が流入し触媒担体２に到達する。
排気ガス５は、触媒担体２の部分より、断面積の小さい
通路２１から進入し、また正電極１が、触媒担体２の中
央部に配置されていることから、ケース４周辺部、及び
正電極１周辺部は、排気ガスの流れに対して淀み部とな
り、図１（ａ）の加熱部３に相当するドーナツ状の領域
を集中的に流れる。電源７より触媒装置に通電が始まる
と加熱部３が集中的に発熱する。加熱部３を通過した排
気ガスは、暖められルーバ６ａ，６ｂにより、図２に示
す様に触媒担体２内を領域９の様に内周側及び外周側へ
拡散していく。その結果、触媒担体２全体が、非常に暖
まり易くなる。As shown in FIG. 1, the exhaust gas 5 flows into the catalyst device arranged in the exhaust passage and reaches the catalyst carrier 2.
The exhaust gas 5 enters from the passage 21 having a smaller cross-sectional area than the portion of the catalyst carrier 2, and since the positive electrode 1 is arranged in the central portion of the catalyst carrier 2, the peripheral portion of the case 4 and the positive electrode. The first peripheral portion becomes a stagnation portion with respect to the flow of the exhaust gas, and intensively flows in a donut-shaped region corresponding to the heating portion 3 in FIG. When power is supplied to the catalyst device from the power source 7, the heating unit 3 intensively generates heat. The exhaust gas that has passed through the heating unit 3 is warmed and diffuses toward the inner peripheral side and the outer peripheral side in the catalyst carrier 2 as shown in FIG. As a result, the entire catalyst carrier 2 becomes very easy to warm.
【００１５】図３に示す様にルーバ６ａ，６ｂが設けら
れていない触媒担体２′では、加熱部３で加熱された排
気ガスは、領域８の様に、加熱部３に対応する部分しか
流れず、触媒担体２全体が暖まりにくくなる。以上の様
に本実施例によれば、部分的に形成された加熱部３が通
電時には先に昇温する。尚、加熱部３は部分的に形成さ
れるため昇温は速い。ルーバ６ａ，６ｂにより加熱部３
から非加熱部へ排気ガスが流れ、加熱部の電気加熱によ
る熱と、昇温活性化された触媒の反応熱が非加熱部へ伝
播し、加熱した排気ガスにより、有効に触媒担体２の全
体を暖めることができ触媒担体２への投入電力を下げ、
省電力化を達成することができる。In the catalyst carrier 2'without the louvers 6a and 6b as shown in FIG. 3, the exhaust gas heated in the heating part 3 flows only in the part corresponding to the heating part 3 like the region 8. Therefore, it becomes difficult for the entire catalyst carrier 2 to warm up. As described above, according to the present embodiment, the partially formed heating portion 3 is first heated when energized. Since the heating portion 3 is partially formed, the temperature rise is fast. Heating part 3 by louvers 6a and 6b
The exhaust gas flows from the heating section to the non-heating section, and the heat generated by the electric heating of the heating section and the reaction heat of the temperature-activated catalyst propagate to the non-heating section. Can be warmed and the power input to the catalyst carrier 2 can be lowered,
Power saving can be achieved.
【００１６】図４に本発明の第２の実施例を示す。第２
の実施例では、加熱部４′は第１の実施例と同様、触媒
担体２の外周部の中心部との中間にドーナツ状に設けら
れているが、触媒担体２の上流端から下流側の位置に、
即ち担体２の内部に設けられている。そして、加熱部
４′より上流側Ａ′の領域では、排気ガスの流れがハッ
チング部９′の様に、加熱部４′に集中させる為、加熱
部４′に対応する領域よりも広い領域Ａ′において、第
１の実施例ルーバ６ａ，６ｂとは逆の配置で、即ち外周
側には排気ガスの流れを内側に誘導し、内周側には排気
ガスの流れを外側に誘導するルーバを設ける。FIG. 4 shows a second embodiment of the present invention. Second
In the second embodiment, the heating section 4'is provided in a donut shape in the middle of the outer peripheral portion of the catalyst carrier 2 as in the first embodiment. position,
That is, it is provided inside the carrier 2. In the area A'upstream of the heating section 4 ', the exhaust gas flow is concentrated in the heating section 4'like the hatched section 9', so that the area A is wider than the area corresponding to the heating section 4 '. ′, The louvers that are arranged opposite to the louvers 6a and 6b of the first embodiment, that is, the louvers that guide the exhaust gas flow inward on the outer peripheral side and guide the exhaust gas flow outward on the inner peripheral side. Set up.
【００１７】一方、加熱部４′より下流側では、第１の
実施例と同様に流れがハッチング部９″の様に加熱部
４′から拡散させる為、第１の実施例のルーバ６ａ，６
ｂと同様の配置でルーバを設ける。この第２の実施例で
は、触媒担体の前面に当る流れを、加熱部４′に集中
させるため、第１実施例より多くのガスを加熱部４′に
流すことができる、加熱部４′が触媒担体２内部にあ
るため排気ガスからの被毒の影響を少くすることができ
る、等の有利点がある。On the other hand, on the downstream side of the heating section 4 ', since the flow diffuses from the heating section 4'like the hatched section 9 "as in the first embodiment, the louvers 6a, 6 of the first embodiment are provided.
The louver is provided in the same arrangement as b. In this second embodiment, since the flow hitting the front surface of the catalyst carrier is concentrated in the heating section 4 ', the heating section 4', which allows more gas to flow into the heating section 4'than in the first embodiment, is provided. Since it is inside the catalyst carrier 2, there is an advantage that the influence of poisoning from exhaust gas can be reduced.
【００１８】図５に第３の実施例を示す。第３の実施例
では、第１実施例のルーバ６ａ，６ｂの代わりに、逆ル
ーバ１０ａ，１０ｂを設置してある。即ち、外周側のル
ーバ１０ａは箔の一部が外側に折返され、内周側のルー
バ１０ｂは箔の一部が内側に折返されている。排ガス流
れを拡散する効果は、第１の実施例とほぼ同じである
が、排気ガスの流れに対して順応する方向の折り曲げ方
であるので、耐久性の点では第１実施例のルーバ６ａ，
６ｂより優れている。FIG. 5 shows a third embodiment. In the third embodiment, reverse louvers 10a and 10b are installed instead of the louvers 6a and 6b of the first embodiment. That is, a part of the foil of the louver 10a on the outer peripheral side is folded back to the outside, and a part of the foil of the louver 10b on the inner peripheral side is folded back to the inside. The effect of diffusing the exhaust gas flow is almost the same as that of the first embodiment, but since it is bent in the direction adapted to the flow of the exhaust gas, the louver 6a of the first embodiment, in terms of durability,
Better than 6b.
【００１９】図６に第４の実施例を示す。本実施例で
は、図５の実施例のような、逆ルーバ１０ａ′，１０
ｂ′を触媒担体２の全領域に配置してある。また逆ルー
バ１０ａ′，１０ｂ′を設けた平箔の保持のため、触媒
担体２の上流側の一部領域２Ａ、及び下流側の一部領域
２Ｂでは、図１（ｄ）のように、波箔２ｂが平箔２ａと
ともに巻き回されている。従って、これらの領域２Ａ及
び２Ｂには逆ルーバは設けられていない。また加熱領域
１１は、触媒担体の全領域１１となっている（即ち、部
分加熱方式ではない）。この様な構成にすることで、触
媒担体２全体を加熱しようとする際にも、逆ルーバ１０
ａ′，１０ｂ′を設けた事により、排気ガスが偏流し、
排気ガスの流れが乱流となるため、排気ガスから触媒担
体２への熱伝達効率が向上し、排気ガスのエネルギによ
って触媒担体２を効率的に暖めることができ、消費電力
の低減が可能となる。FIG. 6 shows a fourth embodiment. In the present embodiment, the reverse louvers 10a ', 10a as in the embodiment of FIG.
b'is arranged in the entire area of the catalyst carrier 2. Further, in order to hold the flat foil provided with the reverse louvers 10a 'and 10b', in the partial area 2A on the upstream side and the partial area 2B on the downstream side of the catalyst carrier 2, as shown in FIG. The foil 2b is wound together with the flat foil 2a. Therefore, no reverse louver is provided in these areas 2A and 2B. The heating region 11 is the entire region 11 of the catalyst carrier (that is, not the partial heating system). With such a configuration, the reverse louver 10 can be used even when trying to heat the entire catalyst carrier 2.
By providing a'and 10b ', the exhaust gas is unevenly distributed,
Since the flow of the exhaust gas becomes turbulent, the heat transfer efficiency from the exhaust gas to the catalyst carrier 2 is improved, the catalyst carrier 2 can be efficiently warmed by the energy of the exhaust gas, and the power consumption can be reduced. Become.
【００２０】図７に第５の実施例を示す。本実施例で
は、図６に示した第４の実施例における加熱領域１１
を、半径方向に関してのみ限定し、部分加熱領域１２
（中心領域を外周領域との間の中間領域の加熱）とした
ものである。従って、逆ルーバは触媒担体２の全域に設
けられている。本実施例においても、第１の実施例と同
様の効果を得ることができる。FIG. 7 shows a fifth embodiment. In this embodiment, the heating region 11 in the fourth embodiment shown in FIG. 6 is used.
Is limited only in the radial direction, and the partial heating region 12
(Heating of the intermediate region between the central region and the outer peripheral region). Therefore, the reverse louvers are provided in the entire area of the catalyst carrier 2. Also in this embodiment, the same effect as that of the first embodiment can be obtained.
【００２１】なお、第４、第５実施例において、排気ガ
スの偏流部材としての逆ルーバを、図１（ａ）の第１実
施例のような向きのルーバにしても、同様の効果を得る
ことができる。以上、本発明の種々の実施例について述
べたように、加熱部の配置や排気ガス流偏向手段（ルー
バ）の形態、配置等について種々選択しうるのはいうま
でもない。In the fourth and fifth embodiments, the same effect can be obtained even if the reverse louver as the exhaust gas drift member is oriented in the direction as in the first embodiment of FIG. 1 (a). be able to. As described above with respect to various embodiments of the present invention, it is needless to say that the arrangement of the heating portion, the form and arrangement of the exhaust gas flow deflecting means (louver), etc. can be variously selected.
【００２２】[0022]
【発明の効果】加熱部により暖められたガスを触媒担体
全体に拡散することができるため、触媒が排ガスの熱エ
ネルギーにより、暖まり易くなり、触媒担体への投入電
力を下げることができる。Since the gas warmed by the heating unit can be diffused over the entire catalyst carrier, the catalyst is easily warmed by the thermal energy of the exhaust gas, and the electric power supplied to the catalyst carrier can be reduced.
【図１】（ａ）は第１の実施例の触媒装置の断面図、
（ｂ），（ｃ），（ｄ）は触媒担体各部の断面図であ
る。FIG. 1A is a sectional view of a catalyst device according to a first embodiment,
(B), (c), (d) is sectional drawing of each part of a catalyst carrier.
【図２】第１の実施例による加熱された排気ガスの流れ
を示す図である。FIG. 2 is a diagram showing a flow of heated exhaust gas according to the first embodiment.
【図３】従来の触媒装置の加熱された排気ガスの流れを
示す図である。FIG. 3 is a diagram showing a flow of heated exhaust gas in a conventional catalyst device.
【図４】第２の実施例の触媒装置の断面図である。FIG. 4 is a sectional view of a catalyst device according to a second embodiment.
【図５】第３の実施例の触媒装置の断面図である。FIG. 5 is a sectional view of a catalyst device according to a third embodiment.
【図６】第４の実施例の触媒装置の断面図である。FIG. 6 is a sectional view of a catalyst device according to a fourth embodiment.
【図７】第５の実施例の触媒装置の断面図である。FIG. 7 is a sectional view of a catalyst device according to a fifth embodiment.
１…中心（正）電極 ２…触媒担体 ２ａ…平板 ２ｂ…波板 ３…発熱部 ４…金属ケース ５…排気ガス流 ６ａ，６ｂ；１０ａ，１０ｂ；１０ａ′，１０ｂ′…排
気ガス流偏向手段（ルーバ） ７…電源 ８，９，９″…加熱排気ガス流 ９′…排気ガス流DESCRIPTION OF SYMBOLS 1 ... Center (positive) electrode 2 ... Catalyst carrier 2a ... Flat plate 2b ... Corrugated plate 3 ... Heating part 4 ... Metal case 5 ... Exhaust gas flow 6a, 6b; 10a, 10b; 10a ', 10b' ... Exhaust gas flow deflecting means (Louver) 7 ... Power source 8, 9, 9 "... Heated exhaust gas flow 9 '... Exhaust gas flow
───────────────────────────────────────────────────── 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 Ｆ０１Ｎ 3/28 ３０１ Ｐ (72)発明者 永見 哲夫 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 渡辺 聖彦 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 吉永 融 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 井沢 明宏 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 藤城 修 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location F01N 3/28 301 P (72) Inventor Tetsuo Nagami 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Corporation Stock In-house (72) Inventor Yoshihiko Watanabe 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Research Institute (72) Inventor Toru Yoshinaga 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Co., Ltd. In-house (72) Inventor Akihiro Izawa 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Research Institute (72) Inventor Osamu Fujishiro 14 Iwatani, Shimohakaku-cho, Nishio-shi, Aichi Japan Auto Parts Co., Ltd. In the laboratory
Claims (2)
成した触媒担体を有する電気加熱式触媒装置において、
発熱部から非発熱部に排気ガスを偏向する第１排気ガス
流偏向手段を触媒担体の内部に設けたことを特徴とする
排気ガス浄化用電気加熱式触媒装置。1. An electrically heated catalyst device having a catalyst carrier which is made of a conductive material and partially has a heat generating portion,
An electrically heated catalyst device for purifying exhaust gas, wherein first exhaust gas flow deflecting means for deflecting exhaust gas from a heat generating portion to a non-heat generating portion is provided inside a catalyst carrier.
に設けると共に、発熱部より排気上流側に、排気ガスを
発熱部に偏向する第２排気ガス流偏向手段を触媒担体の
内部に設けたことを特徴とする請求項１に記載の電気加
熱式触媒装置。2. A heat generating portion is provided downstream of an exhaust upstream end of the catalyst carrier, and second exhaust gas flow deflecting means for deflecting exhaust gas to the heat generating portion is provided inside the catalyst carrier, on the exhaust upstream side of the heat generating portion. The electrically heated catalyst device according to claim 1, wherein
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5352156A JPH07197808A (en) | 1993-12-29 | 1993-12-29 | Electric heating type catalytic device for controlling exhaust emission |
| US08/201,972 US5582805A (en) | 1992-12-21 | 1994-02-25 | Electrically heated catalytic apparatus |
| US08/471,446 US5582803A (en) | 1992-12-21 | 1995-06-06 | Electrically heated catalytic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5352156A JPH07197808A (en) | 1993-12-29 | 1993-12-29 | Electric heating type catalytic device for controlling exhaust emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07197808A true JPH07197808A (en) | 1995-08-01 |
Family
ID=18422166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5352156A Withdrawn JPH07197808A (en) | 1992-12-21 | 1993-12-29 | Electric heating type catalytic device for controlling exhaust emission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07197808A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005017348A1 (en) * | 2003-08-15 | 2005-02-24 | Hitachi, Ltd. | Spark ignition engine and method of controlling combustion of the engine |
| JP2015502244A (en) * | 2011-11-04 | 2015-01-22 | 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 | Exhaust gas treatment equipment |
| CN114929365A (en) * | 2019-10-25 | 2022-08-19 | Ecc技术股份有限公司 | Exhaust system and features thereof |
-
1993
- 1993-12-29 JP JP5352156A patent/JPH07197808A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005017348A1 (en) * | 2003-08-15 | 2005-02-24 | Hitachi, Ltd. | Spark ignition engine and method of controlling combustion of the engine |
| US7377261B2 (en) | 2003-08-15 | 2008-05-27 | Hitachi, Ltd. | Spark ignition engine and method of controlling combustion of the engine |
| JP2015502244A (en) * | 2011-11-04 | 2015-01-22 | 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 | Exhaust gas treatment equipment |
| US9610539B2 (en) | 2011-11-04 | 2017-04-04 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Exhaust-gas treatment device |
| CN114929365A (en) * | 2019-10-25 | 2022-08-19 | Ecc技术股份有限公司 | Exhaust system and features thereof |
| CN114929365B (en) * | 2019-10-25 | 2024-04-12 | Ecc技术股份有限公司 | Exhaust system and features thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2935327B2 (en) | Secondary air supply device for internal combustion engine and gas heating device therefor | |
| JP3334898B2 (en) | Exhaust gas purification device | |
| JPH0754644A (en) | Electric heating-type catalyst device | |
| JPH0540251Y2 (en) | ||
| JP3334897B2 (en) | Exhaust gas purification device | |
| JP3393299B2 (en) | Catalyzer | |
| JPH07197808A (en) | Electric heating type catalytic device for controlling exhaust emission | |
| JP3130354B2 (en) | Electric heating type catalyst device | |
| JPH08284652A (en) | Structure of electrically heating catalyst | |
| JPH0719035A (en) | Partially heating type catalytic converter | |
| JP3260898B2 (en) | Electrically heated catalytic converter | |
| JPH05253491A (en) | Catalyst converter for purifying exhaust gas | |
| JPH06254404A (en) | Self-heating catalyst converter | |
| JPH0780321A (en) | Electric heating metal honeycomb body | |
| JP3193426B2 (en) | Exhaust gas purification device | |
| JPH06170243A (en) | Production of metallic catalyst carrier | |
| JPH078802A (en) | Catalytic carrier for electro-exothermic catalytic convertor | |
| JPH05228373A (en) | Metal monolithic carrier of electrically-heated catalytic converter | |
| JPH05168946A (en) | Energized thermal catalytic device | |
| JPH081011A (en) | Self-heating type catalyst convertor | |
| JP2960015B2 (en) | Catalytic converter for exhaust gas purification | |
| JPH074230A (en) | Electrically heated catalyst device | |
| JP2005052797A (en) | Electrically heating catalyst carrier | |
| JPH0611838U (en) | Electrode structure of electrothermal catalyst carrier | |
| JPH06218290A (en) | Metal catalyst carrier structural body for waste gas capable of being electrically heated |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |