JPH07247828A - Manufacture of exhaust emission control device for internal combustion engine and emission control device - Google Patents
Manufacture of exhaust emission control device for internal combustion engine and emission control deviceInfo
- Publication number
- JPH07247828A JPH07247828A JP6042233A JP4223394A JPH07247828A JP H07247828 A JPH07247828 A JP H07247828A JP 6042233 A JP6042233 A JP 6042233A JP 4223394 A JP4223394 A JP 4223394A JP H07247828 A JPH07247828 A JP H07247828A
- Authority
- JP
- Japan
- Prior art keywords
- molded body
- exhaust gas
- reaction tube
- internal combustion
- combustion engine
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- 238000007747 plating Methods 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 229910052878 cordierite Inorganic materials 0.000 claims description 31
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical group [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 2
- 238000002468 ceramisation Methods 0.000 claims 1
- 208000028659 discharge Diseases 0.000 abstract description 11
- 239000003054 catalyst Substances 0.000 abstract description 5
- 238000003851 corona treatment Methods 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 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 2
- 238000010438 heat treatment Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内燃機関の排気系に装備
される排ガス浄化装置の製造方法及び浄化装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an exhaust gas purifying apparatus and a purifying apparatus for an exhaust system of an internal combustion engine.
【０００２】[0002]
【従来の技術】内燃機関、特にディーゼル機関から排出
される排ガス中のＮＯｘ（ＮＯ，ＮＯ2）を浄化する技
術としては、アルミナやゼオライト系の還元触媒を用い
てＨＣ（還元剤）の共存下で還元除去しようとするもの
（例えば特開昭６３−２８３７２７号公報）、排ガスを
コロナ放電処理することでＮＯｘを分解除去しようとす
るもの（例えば特開平４−４７１１０号公報）、あるい
は、ＮＯｘを含有する被処理ガスをコロナ放電処理した
後に三元触媒等に接触させることでガス中のＮＯｘを除
去しようとするもの（特開昭６３−２４２３２３号公
報）が公知である。2. Description of the Related Art As a technique for purifying NOx (NO, NO 2 ) in exhaust gas discharged from an internal combustion engine, particularly a diesel engine, an alumina or zeolite-based reduction catalyst is used in the presence of HC (reducing agent). (For example, Japanese Unexamined Patent Publication No. 63-283727), NOx for decomposing and removing NOx by subjecting exhaust gas to corona discharge treatment (for example, Japanese Unexamined Patent Publication No. 4-47110), or NOx It is known that the contained gas to be treated is subjected to corona discharge treatment and then contacted with a three-way catalyst or the like to remove NOx in the gas (Japanese Patent Laid-Open No. 63-242323).
【０００３】図７はコロナ放電を利用する浄化装置の構
造を示す説明図である。全体を符号１０で示すコロナ放
電排ガス浄化装置は、略円錐形の排ガスＧが導入される
入口側ケーシング１２０と、出口側ケーシング１３０に
より挾まれた円筒形のケーシング１１０を有し、ケーシ
ング１１０の内部に断熱材１１２を介して固定されたコ
ロナ放電部２００を有する。コロナ放電部２００は、多
数の反応管２３０を、固定板２１０，２２０の間に所定
の間隔をおいて各々が平行に配置されるようにその両端
部で固定すると共に、各反応管２３０の中央には前記固
定板２１０に取り付けられた分電板２４０及び陰極板２
５０には各々リード線（図示せず）が接続され、各リー
ド線は、前記ケーシング１２０，１３０に開口されたリ
ード線引き出し口１２２，１３２からコロナ放電処理装
置の外部に引き出され、陽極側リード線は高電圧発生装
置に接続されると共に陰極側リード線はアースされてい
る。なお、陽極側と陰極側を逆に構成することもでき
る。FIG. 7 is an explanatory view showing the structure of a purifying device utilizing corona discharge. The corona discharge exhaust gas purifying apparatus generally designated by reference numeral 10 has an inlet side casing 120 into which the substantially conical exhaust gas G is introduced, and a cylindrical casing 110 sandwiched by an outlet side casing 130. It has a corona discharge part 200 fixed via a heat insulating material 112. The corona discharge unit 200 fixes a large number of reaction tubes 230 at both ends so that the reaction tubes 230 are arranged in parallel between the fixing plates 210 and 220 with a predetermined space therebetween, and the center of each reaction tube 230 is fixed. The distribution plate 240 and the cathode plate 2 attached to the fixed plate 210.
Lead wires (not shown) are connected to the respective lead wires 50, and the lead wires are drawn out of the corona discharge treatment device through the lead wire outlets 122 and 132 formed in the casings 120 and 130, respectively, and the anode side leads are formed. The wire is connected to the high voltage generator and the cathode side lead wire is grounded. It should be noted that the anode side and the cathode side can be configured in reverse.
【０００４】このコロナ放電部は、例えば１８ＫＶ，２
０ＫＨｚ程度の高周波電圧、又は２０〜２５ＫＶ、２０
０〜３００Ｈｚの方形波パルス高電圧を印加する場合
に、陽極棒２４２の直径寸法は２〜３ｍｍ、反応管２３
０の内径寸法は１４〜２０ｍｍ程度に設定すると、コロ
ナ放電が安定して形成される。反応管２３０はコージュ
ライト製の管体とすることで、排ガスの浄化効率を向上
することができる。コージュライト材料がエンジンの排
ガス浄化用の触媒担体に適していることは、例えば特開
平２−２５５５７５６号公報にも開示されている。This corona discharge unit is, for example, 18 KV, 2
High frequency voltage of about 0 KHz or 20 to 25 KV, 20
When a square wave pulse high voltage of 0 to 300 Hz is applied, the diameter dimension of the anode rod 242 is 2 to 3 mm, the reaction tube 23
When the inner diameter of 0 is set to about 14 to 20 mm, the corona discharge is stably formed. When the reaction tube 230 is made of cordierite, the exhaust gas purification efficiency can be improved. The suitability of a cordierite material as a catalyst carrier for purifying exhaust gas of an engine is also disclosed in, for example, Japanese Patent Laid-Open No. 2555756/1990.
【０００５】図８は反応管２３０の取付構造を示し、固
定板２１０と２２０の間には多数の反応管２５０がとり
つけられ、両固定板２１０，２２０はロッド２２２とナ
ット２２３により皿ばね２２４を介して締付けられる。
皿ばね２２４を介して締付けるのは、固定板と反応管の
材質が異なるときには、両者の熱膨張の差を吸収するた
めに必要となる。反応管２３０を外筒２１０内にできる
だけ多く配設することで浄化効率を向上させることがで
きる。FIG. 8 shows the mounting structure of the reaction tube 230. A large number of reaction tubes 250 are mounted between the fixed plates 210 and 220, and both fixed plates 210 and 220 have a disc spring 224 by a rod 222 and a nut 223. Tightened through.
Tightening through the disc spring 224 is necessary to absorb the difference in thermal expansion between the fixing plate and the reaction tube when the materials are different. By disposing as many reaction tubes 230 as possible in the outer cylinder 210, purification efficiency can be improved.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、各反応
管２３０の外側にはステンレス箔製または銅箔製の陰極
電極２５０を巻きつける必要があり、また、各電極２５
０からリード線をとり出す必要がある。従来の技術では
限られたスペース内にコージュライト製の反応管を数多
く配設することができなかった。本発明はコージュライ
ト製の反応管を一定のスペースの内で数多く配設するこ
とができるコロナ放電装置の製造方法と装置を提供する
ものである。However, it is necessary to wind the cathode electrode 250 made of stainless steel foil or copper foil on the outside of each reaction tube 230, and each electrode 25.
It is necessary to take the lead wire from 0. In the conventional technology, it was not possible to arrange many cordierite reaction tubes in a limited space. The present invention provides a method and an apparatus for manufacturing a corona discharge device in which a large number of cordierite reaction tubes can be arranged within a fixed space.
【０００７】[0007]
【課題を解決するための手段】本発明の製造方法は、反
応管の内径形状に対応した芯部材を有する上部金型と、
芯部材を囲む中空部を有する壁部材を備える下部金型の
間に絶縁材料を充填して上部成形体を成型加工する工程
と、上部成形体の反応管が挿入される貫通穴を有する下
部成形体を成型加工する工程と、上部成形体と下部成形
体を結合する工程と、結合された成形体を焼成してセラ
ミックス化する工程とセラミックス化された成形体の外
周部を導電材料でメッキコーティングする工程とを備え
る。The manufacturing method of the present invention comprises an upper mold having a core member corresponding to the inner diameter of the reaction tube,
Filling an insulating material between lower molds having a wall member having a hollow portion surrounding a core member to mold an upper molded body, and lower molding having a through hole into which a reaction tube of the upper molded body is inserted. A step of molding the body, a step of joining the upper molded body and the lower molded body, a step of firing the combined molded body into a ceramic and a plating coating of the outer peripheral portion of the ceramicized molded body with a conductive material. And a step of performing.
【０００８】[0008]
【作用】この製造方法によれば、例えば、コージュライ
ト材料の反応管が高密度に形成された排ガス浄化装置を
得ることができる。According to this manufacturing method, for example, an exhaust gas purifying apparatus in which reaction tubes of cordierite material are formed with high density can be obtained.
【０００９】[0009]
【実施例】図１及び図２は本発明によるコロナ放電装置
の製造方法を示す。図１は上部金型３００と下部金型３
５０を組立てた状態で原料となるコージュライト４００
を両金型間に充填した状態を示す。上部金型３００は、
平板部材３１０に多数の芯部材３２０を立設したもので
ある。芯部材の断面形状は、丸形のほかに六角形、八角
形等適宜の形状が選択できる。下部金型３５０は、平板
部材３６０と、平板部材３６０上にあって上部金型３０
０の芯部材３２０を囲む中空部を有する中空壁部材３７
０を備える。下部金型３５０の平板部材３６０は、上部
金型３００の芯部材３２０の先端部が挿入される貫通穴
３６２が形成される。1 and 2 show a method of manufacturing a corona discharge device according to the present invention. Figure 1 shows upper mold 300 and lower mold 3
Cordierite 400, which is the raw material when 50 is assembled
Shows the state of filling between both molds. The upper mold 300 is
A large number of core members 320 are erected on the flat plate member 310. The cross-sectional shape of the core member may be a round shape, a hexagonal shape, an octagonal shape, or the like. The lower die 350 includes the flat plate member 360 and the upper die 30 on the flat plate member 360.
Hollow wall member 37 having a hollow portion surrounding the core member 320 of 0
Equipped with 0. The flat plate member 360 of the lower mold 350 has a through hole 362 into which the tip of the core member 320 of the upper mold 300 is inserted.
【００１０】上部金型３００の芯部材３２０と下部金型
３５０の中空壁部材との間には、反応管の内厚寸法に対
応する間隙が設けられる。そして、上部金型３００の平
板部材３１０の下面３１２と、下部金型３５０の中空壁
部材３７０の上面３７２との間には寸法Ｈの間隙が設け
られる。次に、このように組立てられた上部金型３００
と下部金型３５０に対して、間隙を利用してコージュラ
イト原料４００が充填される。コージュライト原料４０
０は、流動性を有する泥状のものであって、組立てられ
た金型の間隙に充填され、硬化する。Between the core member 320 of the upper mold 300 and the hollow wall member of the lower mold 350, a gap corresponding to the inner thickness of the reaction tube is provided. Then, a gap of dimension H is provided between the lower surface 312 of the flat plate member 310 of the upper mold 300 and the upper surface 372 of the hollow wall member 370 of the lower mold 350. Next, the upper mold 300 assembled in this way
The cordierite raw material 400 is filled in the lower die 350 using the gap. Cordierite raw material 40
0 is a fluid mud, which is filled in the gap of the assembled mold and hardened.
【００１１】以上の成形を完了した後に上部金型３００
と下部金型３５０を解体すると、図２の符号５１０で示
す上部コージュライト成形体が得られる。この上部コー
ジュライト成形体５１０は、コージュライトでつくられ
た平板部材５２０と、平板部材５２０から垂下する多数
の中空管部材５３０を有し、平板部材５２０には、中空
管部材５３０の内径と等しい貫通穴５２２が形成され
る。隣接する中空管部材５３０の間隔は従来の製造方法
のものより密にすることができる。After the above molding is completed, the upper die 300
When the lower die 350 is disassembled, an upper cordierite molded body indicated by reference numeral 510 in FIG. 2 is obtained. The upper cordierite molded body 510 has a flat plate member 520 made of cordierite and a large number of hollow tube members 530 hanging from the flat plate member 520. The flat plate member 520 has an inner diameter of the hollow tube member 530. Through hole 522 is formed. The space between adjacent hollow tube members 530 can be made closer than in the conventional manufacturing method.
【００１２】一方、下部コージュライト成形体５５０
は、コージュライトの平板部材５６０に中空管部材５３
０の外径に係合する貫通穴５７０を設けたもので、予め
適宜の成形手段によりつくられる。次に、上部コージュ
ライト成形体５１０と下部コージュライト成形体５５０
を結合して、コロナ放電装置用のコージュライト成形体
の素材を得る。このコージュライト成形体素材を炉内で
加熱焼成してセラミックス化し、コージュライト成形体
５００を得る。On the other hand, the lower cordierite molding 550
Is the hollow tube member 53 on the cordierite plate member 560.
A through hole 570 that engages with the outer diameter of 0 is provided, and is formed in advance by an appropriate molding means. Next, the upper cordierite molded body 510 and the lower cordierite molded body 550
Are combined to obtain a material for a cordierite molded body for a corona discharge device. The cordierite molded body 500 is obtained by heating and firing the cordierite molded body material into a ceramic by heating in a furnace.
【００１３】次に、図３に示すように、コージュライト
成形体を溶融金属７１０が充填されたメッキ槽７００内
に浸漬する。溶融金属７１０は、例えばニッケル、コバ
ルト、アルミ等の導電材料であって、この溶融金属７１
０により、浸漬部の外周面がメッキコーティングされ
る。Next, as shown in FIG. 3, the cordierite molded body is immersed in the plating bath 700 filled with the molten metal 710. The molten metal 710 is, for example, a conductive material such as nickel, cobalt, and aluminum.
By 0, the outer peripheral surface of the immersion portion is plated and coated.
【００１４】図４はコージュライト成形体の反応管５３
０の内周面に導電メッキがなされないように反応管の下
端部に埋栓６００を挿入してシールを施すことを示して
いる。この埋栓６００を各反応管５３０の下端開口部に
挿入し、メッキを施すことにより、外周面に導電層５８
０がコーティングされる。メッキ槽７００からコージュ
ライト成形体５００を引き上げ、埋栓６００をとり外す
と、反応管５３０の外周面及び下側の平板部材５６０の
両面に導電メッキ層５８０が形成される。そこで、この
平板部材５６０の外面の導電メッキ層５８０にリード線
５９０を連結し、このリード線５９０をアースに接続す
ることにより、反応管５３０の外周面を陰極の電極に形
成することができる。FIG. 4 shows a reaction tube 53 of a cordierite molding.
It is shown that the plug 600 is inserted into the lower end portion of the reaction tube so as to prevent the conductive plating from being applied to the inner peripheral surface of No. 0. This plug 600 is inserted into the lower end opening of each reaction tube 530 and plated to form a conductive layer 58 on the outer peripheral surface.
0 is coated. When the cordierite molded body 500 is pulled up from the plating bath 700 and the plug 600 is removed, conductive plating layers 580 are formed on the outer peripheral surface of the reaction tube 530 and both surfaces of the lower flat plate member 560. Therefore, by connecting the lead wire 590 to the conductive plating layer 580 on the outer surface of the flat plate member 560 and connecting the lead wire 590 to the ground, the outer peripheral surface of the reaction tube 530 can be formed as a cathode electrode.
【００１５】図５は本発明によるコージュライト成形体
の製造工程を示すフロー図である。ステップＳ１で上部
コージュライト成形体の成型加工するとともに、ステッ
プＳ２で下部コージュライト成形体を成型加工する。ス
テップＳ３では両成形体を結合してコージュライト成形
体の素材を完成し、ステップＳ４でこれを焼成炉で焼成
してセラミックス化する。ステップＳ５で金属溶融槽内
に成形体を浸漬し、外周部を導電金属でメッキし、電極
を形成する。FIG. 5 is a flow chart showing the manufacturing process of the cordierite molding according to the present invention. In step S1, the upper cordierite molded body is molded, and in step S2, the lower cordierite molded body is molded. In step S3, the two compacts are combined to complete the material of the cordierite compact, and in step S4 this is fired in a firing furnace to form a ceramic. In step S5, the molded body is immersed in the metal melting tank, and the outer peripheral portion is plated with a conductive metal to form an electrode.
【００１６】図６は以上の製造方法により完成したコー
ジュライト成形体５００に電極を配設して、コロナ放電
浄化装置１０のコロナ放電部２００に組込む状態を示
す。図６は排ガスの流入側の端面を示すもので、上部コ
ージュライト成形体の平板部材５２０は図７の固定板２
１０に対応する。反応筒の中空部５２２の中心に陽極棒
２４２を配設し、反応管の外周面のメッキコーティング
を陰極に連結して反応管２３０を得ることができる。FIG. 6 shows a state in which electrodes are arranged on the cordierite molded body 500 completed by the above manufacturing method and incorporated into the corona discharge portion 200 of the corona discharge purification device 10. FIG. 6 shows an end surface on the inflow side of the exhaust gas, and the flat plate member 520 of the upper cordierite molded body is the fixed plate 2 of FIG.
Corresponds to 10. The reaction tube 230 can be obtained by disposing the anode rod 242 at the center of the hollow portion 522 of the reaction tube and connecting the plating coating on the outer peripheral surface of the reaction tube to the cathode.
【００１７】本発明によれば、コージュライト製の反応
管を所定のスペース内に高密度に配設することができ
る。そして、反応管内に導入されるエンジンの排ガスを
コロナ放電処理することにより活性化し、効率良くＮＯ
ｘを還元処理することができる。なお、本実施例では、
コロナ放電反応管の材料としてコージュライトの場合を
説明したが、アルミナ等の材料も使用することができ
る。According to the present invention, cordierite reaction tubes can be arranged in a predetermined space with high density. Then, the exhaust gas of the engine introduced into the reaction tube is activated by corona discharge treatment to efficiently activate NO.
x can be reduced. In this example,
Although the case of cordierite has been described as the material of the corona discharge reaction tube, materials such as alumina can also be used.
【００１８】[0018]
【発明の効果】本発明は以上のように、内燃機関の排ガ
ス浄化に効果のあるコロナ放電装置における反応管を成
型手段により容易に作成することができる。コロナ放電
反応管は、絶縁材料製の管内に陽極を配設し、反応管の
外周面に陰極を設けて、高電圧を印加する。このため
に、各反応管の両端部は絶縁材料の固定板で支持すると
ともに、各反応管の外周面に電極を形成する必要があ
る。本発明によれば、固定板と反応管が一体となった成
形体を絶縁材料により効率良く生産することができる。
また、反応管の外面にもメッキにより容易に電極を設け
ることができる。そこで、外径寸法が規制される内燃機
関の排気系により多くの反応管を設けることができ、浄
化効率も向上する。固定板と反応管が同一材料で一体に
成形されるので、熱膨張の歪が発生しない。INDUSTRIAL APPLICABILITY As described above, according to the present invention, the reaction tube in the corona discharge device which is effective in purifying the exhaust gas of the internal combustion engine can be easily produced by the molding means. In the corona discharge reaction tube, an anode is provided in a tube made of an insulating material, and a cathode is provided on the outer peripheral surface of the reaction tube to apply a high voltage. Therefore, both ends of each reaction tube must be supported by fixing plates made of an insulating material, and electrodes must be formed on the outer peripheral surface of each reaction tube. According to the present invention, a molded body in which a fixed plate and a reaction tube are integrated can be efficiently produced with an insulating material.
Further, the electrode can be easily provided on the outer surface of the reaction tube by plating. Therefore, more reaction tubes can be provided in the exhaust system of the internal combustion engine whose outer diameter dimension is restricted, and the purification efficiency is also improved. Since the fixing plate and the reaction tube are integrally formed of the same material, distortion due to thermal expansion does not occur.
【図１】本発明による成型工程を示す説明図。FIG. 1 is an explanatory view showing a molding process according to the present invention.
【図２】本発明による成型工程を示す説明図。FIG. 2 is an explanatory view showing a molding process according to the present invention.
【図３】メッキコーティング工程を示す説明図。FIG. 3 is an explanatory view showing a plating coating process.
【図４】埋栓処理を示す説明図。FIG. 4 is an explanatory view showing a plugging process.
【図５】本発明の製造方法のフロー図。FIG. 5 is a flowchart of the manufacturing method of the present invention.
【図６】本発明の製造方法により製造された排ガス浄化
装置の正面図。FIG. 6 is a front view of an exhaust gas purifying apparatus manufactured by the manufacturing method of the present invention.
【図７】排ガス浄化装置の構造を示す説明図。FIG. 7 is an explanatory diagram showing the structure of an exhaust gas purifying apparatus.
【図８】従来の構造を示す説明図。FIG. 8 is an explanatory view showing a conventional structure.
１０ コロナ放電排ガス浄化装置 ２００ コロナ放電部 ２１０，２２０ 固定板 ２３０ 反応管 ２４２ 陽極棒 ３００ 上部金型 ３２０ 芯金 ３５０ 下部金型 ３７０ 中空壁部材 ４００ コージュライト ５００ 成形体 ５１０ 上部成形体 ５２０ 固定板 ５３０ 反応管 ５５０ 下部成形体 ６００ 埋栓 ７００ 溶融金属槽 10 Corona Discharge Exhaust Gas Purification Device 200 Corona Discharge Unit 210, 220 Fixing Plate 230 Reaction Tube 242 Anode Rod 300 Upper Mold 320 Core Metal 350 Lower Mold 370 Hollow Wall Member 400 Cordierite 500 Molded Body 510 Upper Molded Body 520 Fixed Plate 530 Reaction tube 550 Lower molded body 600 Closure 700 Molten metal tank
───────────────────────────────────────────────────── 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 Ｂ０１Ｄ 53/86 ＺＡＢ 53/94 Ｂ０１Ｊ 19/08 Ｃ 8822−4Ｇ 35/02 ３０１ Ａ Ｂ０１Ｄ 53/36 １０１ Ｂ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location B01D 53/86 ZAB 53/94 B01J 19/08 C 8822-4G 35/02 301 A B01D 53/36 101 B
Claims (6)
外筒の内部に排ガスの流れに直交する方向に対向して配
設される絶縁材料製の１対の固定板と、１対の固定板の
間に支持される絶縁材料製の多数の反応管と、反応管の
内部に設けられる第１の電極と、反応管の外周部に設け
られる第２の電極を備え、第１の電極と第２の電極間に
高電圧を印加してコロナ放電を発生させ、反応管内の排
ガスを浄化する内燃機関の排ガス浄化装置の製造方法に
おいて、反応管の内径形状に対応した芯部材を有する上
部金型と、芯部材を囲む中空部を有する壁部材を備える
下部金型の間に絶縁材料を充填して上部成形体を成型加
工する工程と、上部成形体の反応管が挿入される貫通穴
を有する下部成形体を成型加工する工程と、上部成形体
と下部成形体を結合する工程と、結合された成形体を焼
成してセラミックス化する工程と、セラミックス化され
た成形体の外周部を導電材料でメッキコーティングする
工程と、を備える内燃機関の排ガス浄化装置の製造方
法。1. An outer cylinder arranged in an exhaust system of an internal combustion engine,
A pair of fixing plates made of an insulating material and arranged inside the outer cylinder so as to face each other in a direction orthogonal to the flow of the exhaust gas; and a plurality of reaction tubes made of an insulating material supported between the pair of fixing plates, A first electrode provided inside the reaction tube and a second electrode provided on the outer periphery of the reaction tube are provided, and a high voltage is applied between the first electrode and the second electrode to generate corona discharge. In a method for manufacturing an exhaust gas purifying apparatus for an internal combustion engine for purifying exhaust gas in a reaction tube, an upper die having a core member corresponding to an inner diameter shape of the reaction tube, and a lower metal having a wall member having a hollow portion surrounding the core member. Filling an insulating material between the molds to mold the upper molded body, molding a lower molded body having a through hole into which a reaction tube of the upper molded body is inserted, upper molded body and lower molded body The process of joining the bodies and firing the joined shaped bodies to make a ceramic Process and method of manufacturing the exhaust gas purifying apparatus of an internal combustion engine comprising the steps of: plating coating an outer periphery of a conductive material Ceramization the moldings, the to of.
部金型の平板部の下面と、下部金型の上面との間に間隔
が形成されるように両金型をセットする工程と、間隔部
に絶縁材料を充填することにより、固定板と反応管が一
体である上部成形体を成型加工する工程と、を備える請
求項１記載の内燃機関の排ガス浄化装置の製造方法。2. A step of setting both dies such that a space is formed between a lower surface of a flat plate portion of an upper die having a flat plate member having a core member implanted therein and an upper surface of a lower die. 2. The method for manufacturing an exhaust gas purifying apparatus for an internal combustion engine according to claim 1, further comprising a step of molding an upper molded body in which the fixing plate and the reaction tube are integrated by filling the gap portion with an insulating material.
ティングする工程は、成形体を導電材料の溶融金属槽に
浸漬させてメッキする工程である請求項１記載の内燃機
関の排ガス浄化装置の製造方法。3. The exhaust gas purifying apparatus for an internal combustion engine according to claim 1, wherein the step of plating the outer periphery of the molded body with a conductive material is a step of plating the molded body by immersing the molded body in a molten metal bath of a conductive material. Production method.
に、下部成形体の貫通穴を埋栓する工程を備える請求項
３記載の内燃機関の排ガス浄化装置の製造方法。4. The method for manufacturing an exhaust gas purifying apparatus for an internal combustion engine according to claim 3, further comprising a step of plugging the through hole of the lower molded body before the step of immersing the molded body in the molten metal tank.
ュライトである請求項１乃至４記載の内燃機関の排ガス
浄化装置の製造方法。5. The method for manufacturing an exhaust gas purifying apparatus for an internal combustion engine according to claim 1, wherein the insulating material used as the material of the molded body is cordierite.
つくられた成形体において、反応管の中心に配設される
第１の電極と、反応管の外周部のメッキコーティング部
に接続される第２の電極を備えてなる内燃機関の排ガス
浄化装置。6. A molded body produced by the manufacturing method according to any one of claims 1 to 5, which is connected to a first electrode arranged at the center of the reaction tube and a plating coating portion on the outer peripheral portion of the reaction tube. An exhaust gas purifying apparatus for an internal combustion engine, comprising a second electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04223394A JP3235328B2 (en) | 1994-03-14 | 1994-03-14 | Method of manufacturing exhaust gas purifying apparatus for internal combustion engine and purifying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04223394A JP3235328B2 (en) | 1994-03-14 | 1994-03-14 | Method of manufacturing exhaust gas purifying apparatus for internal combustion engine and purifying apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07247828A true JPH07247828A (en) | 1995-09-26 |
| JP3235328B2 JP3235328B2 (en) | 2001-12-04 |
Family
ID=12630323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04223394A Expired - Fee Related JP3235328B2 (en) | 1994-03-14 | 1994-03-14 | Method of manufacturing exhaust gas purifying apparatus for internal combustion engine and purifying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3235328B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101461870B1 (en) * | 2011-06-28 | 2014-11-20 | 현대자동차주식회사 | Exhaust gas purification set |
-
1994
- 1994-03-14 JP JP04223394A patent/JP3235328B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101461870B1 (en) * | 2011-06-28 | 2014-11-20 | 현대자동차주식회사 | Exhaust gas purification set |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3235328B2 (en) | 2001-12-04 |
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