JP2002129947A - Exhaust emission purifying device for internal combustion engine - Google Patents
Exhaust emission purifying device for internal combustion engineInfo
- Publication number
- JP2002129947A JP2002129947A JP2000319312A JP2000319312A JP2002129947A JP 2002129947 A JP2002129947 A JP 2002129947A JP 2000319312 A JP2000319312 A JP 2000319312A JP 2000319312 A JP2000319312 A JP 2000319312A JP 2002129947 A JP2002129947 A JP 2002129947A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- discharge
- internal combustion
- combustion engine
- discharge electrode
- 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- Withdrawn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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関より排出
される排ガス中の有害成分を浄化する内燃機関の排気浄
化装置に関し、特にプラズマ発生装置を利用した内燃機
関の排気浄化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for an internal combustion engine that purifies harmful components in exhaust gas discharged from the internal combustion engine, and more particularly to an exhaust gas purifying apparatus for an internal combustion engine using a plasma generator.
【０００２】[0002]
【従来の技術】近年、放電エネルギーを利用して排ガス
を浄化する新たな排ガス浄化技術が研究されている。こ
の技術は、例えばＵＳＰ５７４６０５１号公報に示すよ
うに、放電式の排ガス浄化装置内に複数の平板電極を配
置した積層構造の放電場を構成し、各放電電極間に交流
電圧を印加することで排ガス中の有害成分であるＨＣ、
ＣＯを浄化処理する技術が提案されている。2. Description of the Related Art In recent years, new exhaust gas purifying technologies for purifying exhaust gas using discharge energy have been studied. According to this technology, for example, as shown in US Pat. No. 5,746,051, a discharge field having a laminated structure in which a plurality of flat electrodes are arranged in a discharge type exhaust gas purifying apparatus, and an AC voltage is applied between the discharge electrodes to reduce exhaust gas HC, which is a harmful component in
Techniques for purifying CO have been proposed.
【０００３】[0003]
【発明が解決しようとする課題】しかし、ＵＳＰ５７４
６０５１号公報に開示されている内燃機関の排気浄化装
置の放電電極構成では、単に複数の平板電極を積層構造
に配置したのであって、構造的に静電容量が大きくなる
という特性がある。また、放電電極に高周波の高圧交流
電圧を印加してプラズマを発生させる本装置において、
この高圧交流電圧の周波数を高くすると静電容量が大き
い放電電極ほど、電気エネルギ損失が大きくなるという
特性がある。SUMMARY OF THE INVENTION However, US Pat.
In the discharge electrode configuration of the exhaust gas purifying apparatus for an internal combustion engine disclosed in Japanese Patent No. 6051, a plurality of flat electrodes are simply arranged in a laminated structure, and there is a characteristic that the capacitance is structurally large. Further, in the present apparatus for generating a plasma by applying a high-frequency high-voltage AC voltage to the discharge electrode,
When the frequency of the high-voltage AC voltage is increased, the discharge electrode having a larger capacitance has a characteristic that the electric energy loss increases.
【０００４】この状態を図６に示し、図６中（イ）は、
放電電極に印加される高周波の高圧交流電圧を示す。ま
た、図６中（ロ）は、この加えられた電圧により放電電
極に流れる放電電流を示す。この電流波形（ロ）におけ
るうねりは、静電容量が原因によるものであり、うねり
の中間ラインを境にマイナス、およびプラス側に電流が
流れてプラズマの発生に係わる事の無い無駄な電流が消
費され、エネルギ損失を発生させている。図６中（ハ）
は、対向する放電電極間に放電が発生している状態を示
す。FIG. 6 shows this state, and FIG.
3 shows a high-frequency high-voltage AC voltage applied to a discharge electrode. Further, (b) in FIG. 6 shows a discharge current flowing to the discharge electrode due to the applied voltage. The undulation in this current waveform (b) is due to the capacitance, and wasteful current is consumed that does not affect the generation of plasma due to the current flowing on the minus and plus sides at the middle line of the undulation. Is causing energy loss. (C) in FIG.
Indicates a state in which discharge occurs between the opposing discharge electrodes.
【０００５】このような静電容量が大きい放電電極では
低周波数の高圧交流電圧を加えることとなり、高周波数
の高圧交流電圧を加える事ができる静電容量が小さい放
電電極の場合と比較してプラズマの発生量が少なくな
る。よって、同流量の排ガスの浄化を行うには放電電極
を大型化する必要が生じ、装置の大型化およびコスト高
となって問題である。[0005] Such a discharge electrode having a large capacitance applies a low-frequency high-voltage AC voltage, and the plasma is compared with a discharge electrode having a small capacitance capable of applying a high-frequency high-voltage AC voltage. Generation amount is reduced. Therefore, in order to purify the exhaust gas at the same flow rate, it is necessary to increase the size of the discharge electrode, which causes a problem that the size and cost of the apparatus are increased.
【０００６】本発明の目的は上記の点に鑑み、放電電極
の静電容量を小さくして、装置を大型化することなく、
効率よく排ガスを浄化できるプラズマ発生装置を利用し
た内燃機関の排気浄化装置を提供することにある。SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to reduce the capacitance of a discharge electrode without increasing the size of a device.
An object of the present invention is to provide an exhaust gas purification device for an internal combustion engine using a plasma generation device that can efficiently purify exhaust gas.
【０００７】[0007]
【課題を解決するための手段】上述した課題を解決する
ために、本発明の請求項１記載の内燃機関の排気浄化装
置によると、放電電極を隙間状の電極構造としたことを
特徴とする。According to a first aspect of the present invention, there is provided an exhaust gas purifying apparatus for an internal combustion engine, wherein a discharge electrode has a gap-like electrode structure. .
【０００８】放電電極を隙間状の電極構造とすること
で、単なる平板の電極構造と比べて放電電極の静電容量
を小さくすることができ、放電電極に高周波の高圧交流
電圧を印加しても電気エネルギ損失は低く押さえられ
る。[0008] By forming the discharge electrode with a gap-like electrode structure, the capacitance of the discharge electrode can be reduced as compared with a simple plate electrode structure, and even if a high-frequency high-voltage AC voltage is applied to the discharge electrode. Electric energy loss is kept low.
【０００９】よって、放電電極に高周波の高圧交流電圧
を印加することができて、放電電極を大型化することな
く、つまり、装置を大型化することなく、効率よく排ガ
スを浄化できるプラズマ発生装置を利用した内燃機関の
排気浄化装置を提供できる。Therefore, a plasma generating apparatus capable of applying a high-frequency high-voltage AC voltage to the discharge electrode and efficiently purifying exhaust gas without increasing the size of the discharge electrode, that is, without increasing the size of the apparatus. An exhaust gas purification device for an internal combustion engine using the same can be provided.
【００１０】本発明の請求項２記載の内燃機関の排気浄
化装置によると、請求項１記載の内燃機関の排気浄化装
置において、放電電極を格子状に形成したことを特徴と
する。According to a second aspect of the present invention, there is provided the exhaust gas purifying apparatus for an internal combustion engine according to the first aspect, wherein the discharge electrodes are formed in a lattice shape.
【００１１】このように、放電電極を格子状に形成する
ことで、放電電極の静電容量を小さくすることができ
る。As described above, by forming the discharge electrodes in a grid pattern, the capacitance of the discharge electrodes can be reduced.
【００１２】また、格子状の放電電極により生成される
プラズマは、排ガス雰囲気中で格子状に発生して、排ガ
スとの接触分布を一様にさせる効果がある。Further, the plasma generated by the grid-like discharge electrodes is generated in a grid in an exhaust gas atmosphere, and has an effect of making the contact distribution with the exhaust gas uniform.
【００１３】よって、発生するプラズマが高率よく排ガ
スと反応するので、放電電極を大型化することなく、効
率よく排ガスを浄化できるプラズマ発生装置を利用した
内燃機関の排気浄化装置を提供できる。Therefore, the generated plasma reacts with the exhaust gas at a high rate, so that it is possible to provide an exhaust gas purifying apparatus for an internal combustion engine using a plasma generator capable of efficiently purifying the exhaust gas without increasing the size of the discharge electrode.
【００１４】本発明の請求項３記載の内燃機関の排気浄
化装置によると、請求項１記載の内燃機関の排気浄化装
置において、放電電極を櫛状に形成したことを特徴とす
る。According to a third aspect of the present invention, in the exhaust gas purifying apparatus for an internal combustion engine according to the first aspect, the discharge electrode is formed in a comb shape.
【００１５】このように、放電電極を櫛状に形成するこ
とで、放電電極の静電容量を小さくすることができる。As described above, by forming the discharge electrode in a comb shape, the capacitance of the discharge electrode can be reduced.
【００１６】また、櫛状の放電電極により生成されるプ
ラズマは、排ガス雰囲気中で櫛状に発生して、排ガスと
の接触分布を一様にさせる効果がある。The plasma generated by the comb-like discharge electrodes is comb-like in an exhaust gas atmosphere, and has an effect of making the contact distribution with the exhaust gas uniform.
【００１７】よって、発生するプラズマが高率よく排ガ
スと反応するので、放電電極を大型化することなく、効
率よく排ガスを浄化できるプラズマ発生装置を利用した
内燃機関の排気浄化装置を提供できる。Therefore, the generated plasma reacts with the exhaust gas at a high rate, so that it is possible to provide an exhaust gas purifying apparatus for an internal combustion engine using a plasma generator capable of efficiently purifying the exhaust gas without increasing the size of the discharge electrode.
【００１８】[0018]
【発明の実施の形態】（第１実施形態）以下、本発明の
一実施形態を図１及至４に基づいて詳細に説明する。な
お、図４に示すように排気浄化装置１は、内燃機関であ
るエンジン３０の排気管３１の途中に設けられている。
この排気浄化装置１は、排ガス上流側からプラズマ発生
装置１２、触媒装置３２の順に配設されている。この触
媒装置３２は、例えばＨＣ、ＣＯ、ＮＯXの３つの有害
成分を同時に処理する３元触媒層やＮＯXを処理する選
択還元触媒層等により構成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below in detail with reference to FIGS. In addition, as shown in FIG. 4, the exhaust gas purification device 1 is provided in the middle of an exhaust pipe 31 of an engine 30, which is an internal combustion engine.
This exhaust gas purification device 1 is disposed in the order of a plasma generator 12 and a catalyst device 32 from the exhaust gas upstream side. The catalyst device 32 is constituted, for example HC, CO, by selective reduction catalyst layer or the like for processing the three-way catalyst layer and NO X to simultaneously process the three harmful components NO X.
【００１９】次に、プラズマ発生装置１０の構成を図１
に基づいて説明する。図１は、本発明の第１実施形態の
プラズマ発生装置１０の概略構成図である。このプラズ
マ発生装置１０内には、複数の絶縁基板１１が所定間隔
で平行に配置され、各絶縁基板１１間に排ガスが流れる
偏平な流路１２が形成されている。各絶縁基板１１は、
放電の生じやすい誘電性のある耐熱性絶縁体（例えばア
ルミナ等のセラミック、ガラス等）で形成されている。
各絶縁基板１１内には、それぞれ印刷導体又は導電板に
よって形成された複数の放電電極１３が埋め込まれてい
る。各放電電極１３の一方は、高周波の高圧交流電圧を
発生する高圧電源発生装置１４に接続され、他方は、グ
ランド側に接続されている。このように、排ガスが流れ
る流路１２を挟んで各放電電極１３を対向させて配置し
ている。Next, the configuration of the plasma generator 10 is shown in FIG.
It will be described based on. FIG. 1 is a schematic configuration diagram of a plasma generator 10 according to a first embodiment of the present invention. In the plasma generator 10, a plurality of insulating substrates 11 are arranged in parallel at predetermined intervals, and a flat flow path 12 through which exhaust gas flows is formed between the insulating substrates 11. Each insulating substrate 11
It is formed of a dielectric heat-resistant insulator (for example, ceramic such as alumina, glass, or the like) which easily generates electric discharge.
A plurality of discharge electrodes 13 each formed by a printed conductor or a conductive plate are embedded in each insulating substrate 11. One of the discharge electrodes 13 is connected to a high-voltage power generator 14 for generating a high-frequency high-voltage AC voltage, and the other is connected to the ground. As described above, the discharge electrodes 13 are arranged to face each other with the flow path 12 through which the exhaust gas flows.
【００２０】次に、絶縁基板１１の構成を図２に基づい
て説明する。図２は、本発明の第１実施形態の絶縁基板
１１の詳細図である。図２（ａ）に示す絶縁基板１１
は、この絶縁基板１１内に埋め込まれた放電電極１３に
複数の隙間部２０を備えることで、排ガスが流れる流路
１２を挟んで対向する放電電極１３の面を格子状に形成
している。そして、放電電極１３の端部に形成された接
続端子部２１は、例えば高圧電源発生装置１４に接続さ
れている。Next, the configuration of the insulating substrate 11 will be described with reference to FIG. FIG. 2 is a detailed view of the insulating substrate 11 according to the first embodiment of the present invention. The insulating substrate 11 shown in FIG.
Has a plurality of gaps 20 in the discharge electrode 13 embedded in the insulating substrate 11 so that the surfaces of the discharge electrodes 13 opposed to each other across the flow path 12 through which the exhaust gas flows are formed in a lattice shape. The connection terminal 21 formed at the end of the discharge electrode 13 is connected to, for example, the high-voltage power generator 14.
【００２１】このように、放電電極１３に複数の隙間部
２０を備えることで、対向する放電電極１３間で挟まれ
る放電電極１３の外周枠で決まる面積よりも、対向する
放電電極の対向面にある実質的な電極面積の方が小さく
なるように構成している。As described above, the provision of the plurality of gaps 20 in the discharge electrode 13 makes it possible to reduce the area defined by the outer peripheral frame of the discharge electrode 13 sandwiched between the opposing discharge electrodes 13 on the opposing surface of the opposing discharge electrode. It is configured so that a certain substantial electrode area is smaller.
【００２２】ここで、図２（ｂ）に示す絶縁基板１１ａ
は、図２（ａ）に示す絶縁基板１１に埋め込まれた放電
電極１３での格子ピッチに比して、複数の隙間部２０ａ
を大きく形成することで、この格子ピッチを大きく形成
した放電電極１３ａを示している。このように、この格
子ピッチを変えることで放電面積を調整して放電電極１
３、１３ａの静電容量を電気エネルギ損失の発生しない
最適域に調整するとともに、発生させるプラズマ量の調
整をも可能としている。そして、例えばプラズマ発生装
置１０内において、浄化すべき排ガスの量、および濃度
等の分布にあわせて、最適な格子ピッチの放電電極１
３、１３ａが埋め込まれた絶縁基板１１、１１ａを組合
わせて配置させる構成としている。Here, the insulating substrate 11a shown in FIG.
Is smaller than the grid pitch of the discharge electrodes 13 embedded in the insulating substrate 11 shown in FIG.
The discharge electrode 13a in which the lattice pitch is formed large is shown by forming the large. Thus, by changing the grid pitch, the discharge area is adjusted and the discharge electrode 1 is changed.
The capacitance of the electrodes 3 and 13a is adjusted to an optimum range where electric energy loss does not occur, and the amount of generated plasma can be adjusted. Then, for example, in the plasma generator 10, the discharge electrode 1 having an optimum lattice pitch is adjusted according to the distribution of the amount and concentration of the exhaust gas to be purified.
Insulation substrates 11 and 11a in which 3, 13a are embedded are arranged in combination.
【００２３】つまり、図１に示す複数の絶縁基板１１の
全てを図２（ａ）に示す絶縁基板１１で構成してもよい
し、あるいは、図１に示す複数の絶縁基板１１の全てを
図２（ｂ）に示す絶縁基板１１ａで構成してもよい。更
には、図１に示す複数の絶縁基板１１を、図２（ａ）に
示す絶縁基板１１と図２（ｂ）に示す絶縁基板１１ａと
を組合わせて構成してもよい。That is, all of the plurality of insulating substrates 11 shown in FIG. 1 may be constituted by the insulating substrate 11 shown in FIG. 2A, or all of the plurality of insulating substrates 11 shown in FIG. It may be constituted by the insulating substrate 11a shown in FIG. Further, the plurality of insulating substrates 11 shown in FIG. 1 may be configured by combining the insulating substrate 11 shown in FIG. 2A and the insulating substrate 11a shown in FIG.
【００２４】図３は、この格子ピッチと静電容量との関
係を示し、流路１２を挟んで対向する放電電極１３、１
３ａの面において、全面を電極（格子無し）とした場合
に比して、放電電極１３、１３ａの対向面を格子状とし
そのピッチを小、そのピッチを大へと順に変化させて、
放電電極１３、１３ａの対向面にある実質的な電極面積
を小さくすることで、放電電極１３、１３ａの静電容量
を小さくなるように調整している。FIG. 3 shows the relationship between the grid pitch and the capacitance.
On the surface of 3a, the facing surfaces of the discharge electrodes 13 and 13a are formed in a grid shape, and the pitch is gradually changed to be smaller and the pitch is sequentially changed to be larger than in the case where the entire surface is provided with electrodes (without grid).
The capacitance of the discharge electrodes 13 and 13a is adjusted to be small by reducing the substantial electrode area on the surface facing the discharge electrodes 13 and 13a.
【００２５】また、格子状の放電電極１３、１３ａによ
り生成されるプラズマは、排ガス雰囲気中で格子状に発
生して、排ガスとの接触分布を一様にさせる効果があ
る。よって、発生するプラズマが高率よく排ガスと反応
するので、放電電極１３、１３ａを大型化することな
く、効率よく排ガスを浄化できる。The plasma generated by the grid-like discharge electrodes 13 and 13a is generated in a grid in an exhaust gas atmosphere, and has an effect of making the contact distribution with the exhaust gas uniform. Therefore, the generated plasma reacts with the exhaust gas at a high rate, so that the exhaust gas can be efficiently purified without increasing the size of the discharge electrodes 13 and 13a.
【００２６】以上のように構成した排気浄化装置１の作
用について、以下説明する。エンジン３０が始動されて
ＨＣ、ＣＯ、ＮＯX等の有害成分を含んだ排気ガスがプ
ラズマ発生装置１２に導かれる状態において、高圧電源
発生装置１４から各流路１２を挟んで対向する複数の格
子状の放電電極１３、１３ａに高周波の高圧交流電圧が
印加される。The operation of the exhaust gas purifying apparatus 1 configured as described above will be described below. Is started the engine 30 is HC, CO, in a state where the exhaust gas containing harmful components such as NO X is guided into the plasma generation device 12, a plurality of opposite sides of the respective flow paths 12 from the high voltage power supply generator 14 grid A high-frequency high-voltage AC voltage is applied to the discharge electrodes 13 and 13a in the shape of a circle.
【００２７】この高周波の高圧交流電圧が放電電極１
３、１３ａに印加される場合において、対向する放電電
極１３、１３ａ間で挟まれる放電電極１３の外周枠で決
まる面積を大きくして格子状の放電電極より生成される
プラズマと、この格子状の放電電極１３、１３ａ間で挟
まれる排ガスとの接触分布を一様にさせている。The high-frequency high-voltage AC voltage is applied to the discharge electrode 1
When the voltage is applied to the discharge electrodes 3 and 13a, the area generated by the outer peripheral frame of the discharge electrode 13 sandwiched between the opposing discharge electrodes 13 and 13a is increased, and the plasma generated from the discharge electrodes in the form of a lattice is formed. The contact distribution with the exhaust gas sandwiched between the discharge electrodes 13 and 13a is made uniform.
【００２８】そして、この大きくした放電電極１３の外
周枠で決まる面積よりも放電電極１３、１３ａの対向面
にある実質的な電極面積を小さく構成することで、電気
エネルギ損失無く放電電極１３、１３ａに高周波の高圧
交流電圧の印加を可能として、触媒装置３２との組み合
わせによってＨＣ、ＣＯ、ＮＯXの３つの有害成分を同
時に浄化処理している。By making the substantial electrode area on the facing surface of the discharge electrodes 13 and 13a smaller than the area determined by the enlarged outer peripheral frame of the discharge electrode 13, the discharge electrodes 13 and 13a have no electric energy loss. to the possible application of high frequency high alternating voltage, HC in combination with the catalytic converter 32, CO, and simultaneously purification treatment three harmful components NO X.
【００２９】このように、放電電極１３、１３ａの静電
容量を小さくして、放電電極１３、１３ａを大型化する
ことなく効率よく排ガスを浄化できる排気浄化装置１を
提供できる。As described above, it is possible to provide the exhaust gas purifying apparatus 1 in which the capacitance of the discharge electrodes 13 and 13a is reduced and the exhaust gas can be efficiently purified without increasing the size of the discharge electrodes 13 and 13a.
【００３０】（第２実施形態）本発明の第２実施形態を
図５（ａ）に示す。第１実施形態では、放電電極１３に
複数の隙間部２０を備えることで、放電電極１３の面を
格子状に形成したのに対し、本発明の第２実施形態の放
電電極５３では、複数の隙間部５０を備えることで、放
電電極５３の面を櫛状に形成した。(Second Embodiment) FIG. 5A shows a second embodiment of the present invention. In the first embodiment, the surface of the discharge electrode 13 is formed in a lattice shape by providing a plurality of gaps 20 in the discharge electrode 13, whereas the discharge electrode 53 of the second embodiment of the present invention has a plurality of gaps 20. By providing the gap 50, the surface of the discharge electrode 53 was formed in a comb shape.
【００３１】この放電電極５３の面を櫛状に形成するこ
とで、放電電極５３の静電容量を小さくすることができ
る。By forming the surface of the discharge electrode 53 in a comb shape, the capacitance of the discharge electrode 53 can be reduced.
【００３２】また、櫛状の放電電極５３により生成され
るプラズマは、排ガス雰囲気中で櫛状に発生して、排ガ
スとの接触分布を一様にさせる効果がある。よって、発
生するプラズマが高率よく排ガスと反応するので、放電
電極５３を大型化することなく、効率よく排ガスを浄化
できる。The plasma generated by the comb-like discharge electrode 53 is generated in a comb-like manner in an exhaust gas atmosphere, and has an effect of making the contact distribution with the exhaust gas uniform. Therefore, the generated plasma reacts with the exhaust gas at a high rate, so that the exhaust gas can be efficiently purified without increasing the size of the discharge electrode 53.
【００３３】そして、放電電極１３の端部に形成された
接続端子部５１は、例えば高圧電源発生装置１４に接続
されている。５２は、絶縁基板である。The connection terminal 51 formed at the end of the discharge electrode 13 is connected to, for example, the high-voltage power generator 14. 52 is an insulating substrate.
【００３４】このように、放電電極５３に複数の隙間部
５０を備えることで、対向する放電電極５３間で挟まれ
る放電電極１３の外周枠で決まる面積よりも、対向する
放電電極５３の対向面にある実質的な電極面積を小さく
構成している。As described above, the provision of the plurality of gaps 50 in the discharge electrode 53 allows the opposing surface of the opposing discharge electrode 53 to be smaller than the area determined by the outer peripheral frame of the discharge electrode 13 sandwiched between the opposing discharge electrodes 53. Is substantially reduced.
【００３５】ここで、図５（ｂ）に示す絶縁基板５３ａ
は、図５（ａ）に示す絶縁基板５２に埋め込まれた放電
電極５３での櫛間ピッチに比して、複数の隙間部５０ａ
を大きく形成することで、この櫛間ピッチを大きく形成
した放電電極５３ａを示している。このように、この櫛
間ピッチを変えることで放電面積を調整して放電電極５
３、５３ａの静電容量を電気エネルギ損失の発生しない
最適域に調整するとともに、発生させるプラズマ量の調
整をも可能としている。そして、例えばプラズマ発生装
置１０内において、浄化すべき排ガスの量、および濃度
等の分布にあわせて、最適な櫛間ピッチの放電電極５
３、５３ａが埋め込まれた絶縁基板５２、５２ａを組合
わせて配置させる構成としている。Here, the insulating substrate 53a shown in FIG.
Is smaller than the inter-comb pitch of the discharge electrodes 53 embedded in the insulating substrate 52 shown in FIG.
Is formed, the discharge electrode 53a having a large inter-comb pitch is shown. As described above, the discharge area is adjusted by changing the pitch between the combs, and the discharge electrode 5
The capacitance of 3, 53a is adjusted to an optimum range where electric energy loss does not occur, and the amount of plasma to be generated can be adjusted. Then, for example, in the plasma generator 10, the discharge electrodes 5 having the optimum inter-comb pitch are adjusted according to the distribution of the amount and concentration of the exhaust gas to be purified.
The structure is such that the insulating substrates 52, 52a in which 3, 53a are embedded are arranged in combination.
【図１】本発明の第１実施形態のプラズマ発生装置の概
略構成図である。FIG. 1 is a schematic configuration diagram of a plasma generator according to a first embodiment of the present invention.
【図２】本発明の第１実施形態の絶縁基板の詳細図であ
る。 （ａ）格子ピッチ小の放電電極を埋め込んだ絶縁基板の
横断面図である。 （ｂ）格子ピッチ大の放電電極を埋め込んだ絶縁基板の
横断面図である。FIG. 2 is a detailed view of the insulating substrate according to the first embodiment of the present invention. FIG. 3A is a cross-sectional view of an insulating substrate in which discharge electrodes having a small grid pitch are embedded. (B) is a cross-sectional view of an insulating substrate in which discharge electrodes having a large grid pitch are embedded.
【図３】本発明の第１実施形態の放電電極における格子
ピッチと静電容量との関係を示す特性図である。FIG. 3 is a characteristic diagram illustrating a relationship between a grid pitch and a capacitance in a discharge electrode according to the first embodiment of the present invention.
【図４】本発明の第１実施形態の排気浄化装置システム
全体を示す概略構成図である。FIG. 4 is a schematic configuration diagram illustrating the entire exhaust gas purification apparatus system according to the first embodiment of the present invention.
【図５】本発明の第２実施形態の絶縁基板の詳細図であ
る。 （ａ）櫛間ピッチ小の放電電極を埋め込んだ絶縁基板の
横断面図である。 （ｂ）櫛間ピッチ大の放電電極を埋め込んだ絶縁基板の
横断面図である。FIG. 5 is a detailed view of an insulating substrate according to a second embodiment of the present invention. FIG. 3A is a cross-sectional view of an insulating substrate in which discharge electrodes having a small inter-comb pitch are embedded. (B) is a cross-sectional view of an insulating substrate in which discharge electrodes having a large inter-comb pitch are embedded.
【図６】静電容量による電気エネルギ損失の発生を示す
説明図である。FIG. 6 is an explanatory diagram showing generation of electric energy loss due to capacitance.
１ 排気浄化装置 １２ プラズマ発生装置 １９ 隙間部 ３２ 放電電極 DESCRIPTION OF SYMBOLS 1 Exhaust purification device 12 Plasma generator 19 Gap part 32 Discharge electrode
Claims (3)
複数の放電電極を対向させ、前記流路内で放電を発生さ
せることで、排ガスを浄化する内燃機関の排気浄化装置
において、 前記放電電極を隙間状の電極構造としたことを特徴とす
る内燃機関の排気浄化装置。1. An exhaust gas purifying apparatus for an internal combustion engine for purifying exhaust gas by causing a plurality of discharge electrodes to face each other across a flow path through which exhaust gas of the internal combustion engine flows and generating discharge in the flow path. An exhaust purification device for an internal combustion engine, wherein the electrodes have a gap-like electrode structure.
特徴とする請求項１に記載の内燃機関の排気浄化装置。2. The exhaust gas purifying apparatus for an internal combustion engine according to claim 1, wherein said discharge electrodes are formed in a grid.
徴とする請求項１に記載の内燃機関の排気浄化装置。3. The exhaust gas purifying apparatus for an internal combustion engine according to claim 1, wherein said discharge electrode is formed in a comb shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000319312A JP2002129947A (en) | 2000-10-19 | 2000-10-19 | Exhaust emission purifying device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000319312A JP2002129947A (en) | 2000-10-19 | 2000-10-19 | Exhaust emission purifying device for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002129947A true JP2002129947A (en) | 2002-05-09 |
Family
ID=18797795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000319312A Withdrawn JP2002129947A (en) | 2000-10-19 | 2000-10-19 | Exhaust emission purifying device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002129947A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005001249A1 (en) * | 2003-06-27 | 2005-01-06 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma reactor, and exhaust gas cleaner |
| EP1638377A1 (en) * | 2003-06-20 | 2006-03-22 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| EP1638376A1 (en) * | 2003-06-20 | 2006-03-22 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| JP2007258090A (en) * | 2006-03-24 | 2007-10-04 | Ngk Insulators Ltd | Plasma generation electrode, plasma reactor, and exhaust gas clarification device |
| WO2008123357A1 (en) * | 2007-03-30 | 2008-10-16 | Kyocera Corporation | Plasma generating body and reaction apparatus |
| JP2017107717A (en) * | 2015-12-09 | 2017-06-15 | 日本特殊陶業株式会社 | Plasma reactor and plasma electrode plate |
| EP3383144A4 (en) * | 2015-11-24 | 2019-05-08 | NGK Spark Plug Co., Ltd. | Plasma reactor |
| CN110505772A (en) * | 2018-05-18 | 2019-11-26 | 蒋亮健 | Box electrostatic field generator device |
-
2000
- 2000-10-19 JP JP2000319312A patent/JP2002129947A/en not_active Withdrawn
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7638103B2 (en) | 2003-06-20 | 2009-12-29 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying device |
| EP1638377A1 (en) * | 2003-06-20 | 2006-03-22 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| EP1638376A1 (en) * | 2003-06-20 | 2006-03-22 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| JPWO2004114728A1 (en) * | 2003-06-20 | 2006-08-03 | 日本碍子株式会社 | Plasma generating electrode, plasma generating apparatus, and exhaust gas purification apparatus |
| EP1638376A4 (en) * | 2003-06-20 | 2008-04-02 | Ngk Insulators Ltd | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| EP1638377A4 (en) * | 2003-06-20 | 2008-04-02 | Ngk Insulators Ltd | Plasma generating electrode, plasma generation device, and exhaust gas purifying apparatus |
| JP4746986B2 (en) * | 2003-06-20 | 2011-08-10 | 日本碍子株式会社 | Plasma generating electrode, plasma generating apparatus, and exhaust gas purification apparatus |
| US7635824B2 (en) | 2003-06-20 | 2009-12-22 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma generation device, and exhaust gas purifying device |
| WO2005001249A1 (en) * | 2003-06-27 | 2005-01-06 | Ngk Insulators, Ltd. | Plasma generating electrode, plasma reactor, and exhaust gas cleaner |
| JP2007258090A (en) * | 2006-03-24 | 2007-10-04 | Ngk Insulators Ltd | Plasma generation electrode, plasma reactor, and exhaust gas clarification device |
| JPWO2008123357A1 (en) * | 2007-03-30 | 2010-07-15 | 京セラ株式会社 | Plasma generator and reactor |
| WO2008123357A1 (en) * | 2007-03-30 | 2008-10-16 | Kyocera Corporation | Plasma generating body and reaction apparatus |
| KR101117144B1 (en) * | 2007-03-30 | 2012-05-31 | 쿄세라 코포레이션 | Plasma generating body and reaction apparatus |
| US8349266B2 (en) | 2007-03-30 | 2013-01-08 | Kyocera Corporation | Plasma generator and reaction apparatus |
| EP3383144A4 (en) * | 2015-11-24 | 2019-05-08 | NGK Spark Plug Co., Ltd. | Plasma reactor |
| JP2017107717A (en) * | 2015-12-09 | 2017-06-15 | 日本特殊陶業株式会社 | Plasma reactor and plasma electrode plate |
| CN110505772A (en) * | 2018-05-18 | 2019-11-26 | 蒋亮健 | Box electrostatic field generator device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6464945B1 (en) | Non-thermal plasma exhaust NOx reactor | |
| US6423190B2 (en) | Pulse density modulation for uniform barrier discharge in a nonthermal plasma reactor | |
| JP4746986B2 (en) | Plasma generating electrode, plasma generating apparatus, and exhaust gas purification apparatus | |
| JP4104627B2 (en) | Plasma generating electrode, plasma generating apparatus, and exhaust gas purification apparatus | |
| KR20030075472A (en) | Plasma reactor and method of manufacturing the same and apparatus for decreasing exhaust gas using the same | |
| US7648683B2 (en) | Plasma generating electrode, plasma generator, and exhaust gas purifying device | |
| JP2002129947A (en) | Exhaust emission purifying device for internal combustion engine | |
| JP2001193441A (en) | Exhaust emission control device for internal combustion engine | |
| EP3318735B1 (en) | Plasma generating electrode, electrode panel, and plasma reactor | |
| US20050079112A1 (en) | Surface discharge non-thermal plasma reactor and method | |
| KR20010041264A (en) | A component for gas treatment | |
| JP2005098134A (en) | Exhaust emission control device | |
| JP3863701B2 (en) | Plasma reactor | |
| JP4299019B2 (en) | Plasma reactor | |
| JP2008251521A (en) | Plasma-generating body, plasma-generating apparatus, ozone-generating apparatus, and exhaust gas treatment apparatus | |
| US6800256B2 (en) | Scaleable inter-digitized tine non-thermal plasma reactor | |
| JP2002256851A (en) | Exhaust gas purifier of internal combustion engine | |
| KR100600756B1 (en) | Surface discharge type air cleaning device | |
| JP2002213228A (en) | Exhaust emission control device for internal combustion engine | |
| KR100875882B1 (en) | Exhaust gas treatment system | |
| JP2017016814A (en) | Electrode for plasma generation, electrode panel and plasma reactor | |
| JP2001193442A (en) | Exhaust emission control device for internal combustion engine | |
| US6946793B1 (en) | Plasma reactor design for treating auto emissions—durable and low cost | |
| KR100692141B1 (en) | Plasma reactor and apparatus for decreasing exhausting gas of a vehicle including the same | |
| KR100462188B1 (en) | Mass-producible, Multi-perpose Plate-to-Plate Type Plasma Reactor Using Thin Ceramic Plates and Fabricating Method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20080108 |