JPH0849527A - Exhaust emission controlling catalyst device - Google Patents
Exhaust emission controlling catalyst deviceInfo
- Publication number
- JPH0849527A JPH0849527A JP7001896A JP189695A JPH0849527A JP H0849527 A JPH0849527 A JP H0849527A JP 7001896 A JP7001896 A JP 7001896A JP 189695 A JP189695 A JP 189695A JP H0849527 A JPH0849527 A JP H0849527A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- energization
- catalyst device
- catalyst member
- 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
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
- F01N3/202—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means using microwaves
-
- 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
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
-
- 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)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、エンジンの排気中のＮ
ＯX 等の有害成分を低減させるための排気ガス浄化用触
媒装置に関する。BACKGROUND OF THE INVENTION The present invention relates to N in exhaust gas of an engine.
O X exhaust gas purifying catalyst device for reducing harmful components concerning.
【０００２】[0002]
【従来の技術】従来、排気ガス中のＮＯX 処理は、ガソ
リンエンジンの場合には、その排気を三元触媒に導入す
ることにより通常行われているが、ディーゼルエンジン
やリーンバーンガソリンエンジン等の場合には、排気ガ
ス中の酸素量が多いために三元触媒が使用できず、還元
触媒を用いることにより排気ガス中のＮＯX を低減させ
ている。2. Description of the Related Art Conventionally, in the case of a gasoline engine, the NO x treatment in the exhaust gas is usually carried out by introducing the exhaust gas into a three-way catalyst, but in a diesel engine or a lean burn gasoline engine, etc. case, the three-way catalyst for many amount of oxygen in the exhaust gas can not be used, thereby reducing the NO X in the exhaust gas by using a reducing catalyst.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、還元触
媒を用いる場合、化学反応によりＮＯX を選択的に除去
するが、その際に酸素、燃料中のＳ、オイル添加剤中の
Ｐ、Ｚｎ、Ｃａ、Ｍａ、Ｐｂおよび燃料添加剤中の被毒
物質が触媒上に吸着し、それが酸素気流中で脱離できな
いため触媒を被毒する。そこで、触媒に吸着した酸素を
炭化水素と反応させて除去する方法や、ＮＯX を選択的
に吸着できる触媒が研究されているが、十分な活性が得
られていない。However, when a reducing catalyst is used, NO X is selectively removed by a chemical reaction, in which case oxygen, S in the fuel, P, Zn, Ca in the oil additive are removed. , Ma, Pb and poisoning substances in the fuel additive are adsorbed on the catalyst, which poisons the catalyst because it cannot be desorbed in the oxygen stream. Therefore, a method of removing oxygen adsorbed on the catalyst by reacting it with a hydrocarbon and a catalyst capable of selectively adsorbing NO x have been studied, but sufficient activity has not been obtained.
【０００４】本発明は上記問題を解決するものであっ
て、エンジンの排気中のＮＯX を低減させるための触媒
装置において、触媒上に吸着した酸素等の被毒物質を除
去することができる排気ガス浄化用触媒装置を提供する
ことを目的とする。The present invention solves the above problems, and in a catalyst device for reducing NO x in exhaust gas of an engine, exhaust gas capable of removing poisonous substances such as oxygen adsorbed on the catalyst. An object is to provide a gas purification catalyst device.
【０００５】[0005]
【課題を解決するための手段】そのために本発明の請求
項１記載の排気ガス浄化用触媒装置は、エンジン１の排
気管２に配設される触媒装置３と、触媒装置３内に配設
され導電性材料からなる触媒部材７と、触媒部材７への
通電を制御する通電制御装置９とを備えたことを特徴と
する。また、本発明の請求項２記載の排気ガス浄化用触
媒装置は、エンジン１の排気管に配設される触媒装置３
と、触媒装置３内に配設され導電性材料からなる触媒部
材７と、触媒部材７表面に放電するためのマイクロ波発
生装置１９と、マイクロ波発生装置１９への通電を制御
する通電制御装置９とを備えたことを特徴とする。な
お、上記構成に付加した番号は、本発明の理解を容易に
するために図面と対比させるためのもので、これにより
本発明の構成が何ら限定されるものではない。To this end, an exhaust gas purifying catalyst device according to claim 1 of the present invention is provided in the exhaust pipe 2 of the engine 1, and in the catalyst device 3. The present invention is characterized by including a catalyst member 7 made of a conductive material and an energization control device 9 for controlling energization of the catalyst member 7. Further, the exhaust gas purifying catalyst device according to claim 2 of the present invention is a catalyst device 3 arranged in the exhaust pipe of the engine 1.
A catalyst member 7 disposed in the catalyst device 3 and made of a conductive material; a microwave generator 19 for discharging on the surface of the catalyst member 7; and an energization controller for controlling energization of the microwave generator 19. And 9 are provided. It should be noted that the numbers added to the above-mentioned configurations are for comparison with the drawings in order to facilitate understanding of the present invention, and the configurations of the present invention are not limited thereby.
【０００６】[0006]
【作用】本発明においては、触媒表面に流れてくるＮＯ
は、触媒表面に吸着し、ＮとＯが解離して窒素Ｎ2 が形
成され脱離する。一方で酸素が触媒表面に吸着するが、
触媒部材への通電または放電により吸着した酸素を脱離
する。In the present invention, NO flowing on the catalyst surface
Is adsorbed on the surface of the catalyst, and N and O are dissociated to form nitrogen N 2 , which is desorbed. On the other hand, oxygen is adsorbed on the catalyst surface,
The adsorbed oxygen is desorbed by energizing or discharging the catalyst member.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。図１は、本発明の排気ガス浄化用触媒装置の１
実施例を示し、図１（Ａ）は全体構成図、図１（Ｂ）〜
図１（Ｅ）は触媒部材の各種例を示す図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an exhaust gas purifying catalyst device 1 according to the present invention.
An example is shown, FIG. 1 (A) is an overall configuration diagram, and FIG.
FIG. 1 (E) is a diagram showing various examples of the catalyst member.
【０００８】エンジン１に接続された排気管２には、本
発明に係わる触媒装置３が配設されている。触媒装置３
は、断熱材４で囲まれたチャンバー５と、断熱材４中に
埋設された電気ヒータ６と、チャンバー５内に配設され
た導電性材料からなる触媒部材７とから構成されてい
る。触媒部材７の外周縁には絶縁材８が挟着されてい
る。電気ヒータ６と触媒部材７は、通電制御装置９に接
続されている。電気ヒータ６には、チャンバー５内に設
けられた温度センサ１０により、チャンバー５内の温度
が例えば３００℃以下になったときに通電し、チャンバ
ー５内を高温にすることにより、ＮＯX の低減率を向上
させるようにしている。A catalyst device 3 according to the present invention is arranged in an exhaust pipe 2 connected to the engine 1. Catalyst device 3
Is composed of a chamber 5 surrounded by a heat insulating material 4, an electric heater 6 embedded in the heat insulating material 4, and a catalyst member 7 made of a conductive material and disposed in the chamber 5. An insulating material 8 is sandwiched on the outer peripheral edge of the catalyst member 7. The electric heater 6 and the catalyst member 7 are connected to the energization control device 9. The electric heater 6 is energized by the temperature sensor 10 provided in the chamber 5 when the temperature in the chamber 5 becomes, for example, 300 ° C. or less, and the temperature in the chamber 5 is increased to reduce NO X. I try to improve the rate.
【０００９】触媒部材７の材料としては、Ｐｔ等の貴金
属、Ｃｕ、Ａｌ、Ｆｅ、Ｚｎ等の卑金属、ペロブスカイ
ト系の複合化合物、その他半導体物質等の導電性材料を
使用する。As the material of the catalyst member 7, a noble metal such as Pt, a base metal such as Cu, Al, Fe and Zn, a perovskite complex compound, and other conductive materials such as semiconductor materials are used.
【００１０】触媒部材７の構造としては、図１（Ｂ）に
示すように、６０〜８０メッシュ程度の円形状または多
角形状の金網や、図１（Ｃ）に示すように、フォーム状
の構造や、図１（Ｄ）に示すように、針金状の電極材を
縦横にブロック状に交差させた構造や、図１（Ｅ）に示
すように、コージェライトからなるハニカム構造１１に
おいて、内部のコージェライト層１２の表面に電極材１
３を薄膜状に形成した構造を用いる。なお、これらの触
媒部材７の複数を直列に並べるようにしてもよいし、触
媒部材７として異なる構造のものを組み合わせるように
してもよい。As the structure of the catalyst member 7, as shown in FIG. 1 (B), a circular or polygonal wire mesh of about 60 to 80 mesh or a foam-like structure as shown in FIG. 1 (C). Alternatively, as shown in FIG. 1 (D), a structure in which wire-shaped electrode materials are crossed vertically and horizontally in a block shape, or as shown in FIG. 1 (E), in a honeycomb structure 11 made of cordierite, Electrode material 1 on the surface of cordierite layer 12
A structure in which 3 is formed in a thin film is used. A plurality of these catalyst members 7 may be arranged in series, or the catalyst members 7 having different structures may be combined.
【００１１】図２は触媒部材７の他の例を示す図であ
る。図１（Ｂ）〜図１（Ｅ）の例は、触媒部材７に電流
を並列的に流すようにしているが、この場合には、最も
短い経路の抵抗が最小となるため集中的に電流が流れて
しまう問題がある。そこで、本例においては、触媒部材
７をコイル状として直列に接続し、電流を触媒部材７に
均等に流すようにしている。図２（Ａ）は、普通のコイ
ル状の例を示し、図２（Ｂ）は二重コイルの例を示し、
図２（Ｃ）は同心円状コイルを示し、図２（Ｄ）は、同
心円状コイルの複数を直列接続した例を示し、図２
（Ｅ）は絶縁性の２本のロッド１４間にコイルを巻き付
けた例を示し、図２（Ｆ）は図２（Ｅ）のコイルの複数
を交差させて配列した例を示している。FIG. 2 is a view showing another example of the catalyst member 7. In the example of FIGS. 1 (B) to 1 (E), the current is made to flow in parallel to the catalyst member 7, but in this case, the resistance of the shortest path becomes the minimum, so that the current is concentrated. There is a problem that is flowing. Therefore, in this example, the catalyst member 7 is formed in a coil shape and connected in series so that an electric current is evenly applied to the catalyst member 7. FIG. 2 (A) shows an example of an ordinary coil, and FIG. 2 (B) shows an example of a double coil.
2C shows a concentric coil, and FIG. 2D shows an example in which a plurality of concentric coils are connected in series.
(E) shows an example in which a coil is wound between two insulating rods 14, and FIG. 2 (F) shows an example in which a plurality of the coils in FIG. 2 (E) are crossed and arranged.
【００１２】図３は、本発明における触媒部材７への通
電の制御フローを示す図である。時間を積算してゆき、
時間カウンタ値Ｔ１が規定時間ｔ１（例えば３０分）を
越えた場合に、触媒部材７への通電をオンし、通電開始
からの経過時間Ｔ２が規定時間ｔ２（例えば１０秒）を
越えた場合に、触媒部材７への通電をオフし、時間カウ
ンタ値ＴをクリアしてステップＳ１に戻り、以後この処
理を繰り返すことにより規定時間毎に触媒部材７への通
電を制御するようにしている。FIG. 3 is a diagram showing a control flow for energizing the catalyst member 7 in the present invention. Accumulate time,
When the time counter value T1 exceeds the specified time t1 (for example, 30 minutes), the energization of the catalyst member 7 is turned on, and the elapsed time T2 from the start of the energization exceeds the specified time t2 (for example, 10 seconds). The power supply to the catalyst member 7 is turned off, the time counter value T is cleared, the process returns to step S1, and this process is repeated thereafter to control the power supply to the catalyst member 7 at regular time intervals.
【００１３】図４は、Ｐｔからなる図１（Ｂ）の触媒部
材７を用い、触媒装置３の入口側ＮＯX 濃度が６５４ｐ
ｐｍ、酸素濃度１５％、温度２９０℃の条件下で、時間
Ｔ１において触媒部材７に電流５Ａ、電圧１０．０９Ｖ
で１０秒間通電した場合の実験結果を示している。時間
Ｔ１以後、通電している間はＮＯX 低減率が低下する
が、やがて、ＮＯX 低減率は増加に転じ、触媒部材７が
再生されたことが判る。なお、ＮＯX 低減率（％）＝
〔（入口側ＮＯX 濃度−出口側ＮＯX 濃度）／入口側Ｎ
ＯX 濃度〕×１００である。[0013] Figure 4, using the catalyst member 7 shown in FIG. 1 (B) made of Pt, the inlet side concentration of NO X catalyst device 3 654P
Under conditions of pm, oxygen concentration 15%, and temperature 290 ° C., at time T1, the catalyst member 7 has a current of 5 A and a voltage of 10.09 V.
Shows the experimental result when energized for 10 seconds. After the time T1, the NO X reduction rate decreases while electricity is being supplied, but eventually the NO X reduction rate starts to increase and it is understood that the catalyst member 7 is regenerated. The NO X reduction rate (%) =
[(Inlet side NO X concentration - outlet NO X concentration) / inlet side N
O X concentration] is × 100.
【００１４】図５（Ａ）は本発明における酸素の脱離作
用を説明するための概念図、図５（Ｂ）は本発明におけ
る硫黄の脱離作用を説明するための概念図である。図５
（Ａ）において、ステップで触媒表面に流れてくるＮ
Ｏは、ステップで触媒表面に吸着し、ステップでＮ
とＯが解離し、ステップで窒素Ｎ2 が形成され、ステ
ップで窒素Ｎ2 が脱離する一方で酸素が触媒表面に吸
着するが、ステップで通電により吸着した酸素が脱離
する。上記ステップの化学反応式は下記の通りである。FIG. 5 (A) is a conceptual diagram for explaining the desorption action of oxygen in the present invention, and FIG. 5 (B) is a conceptual diagram for explaining the desorption action of sulfur in the present invention. Figure 5
In (A), N flowing on the catalyst surface in step
O is adsorbed on the catalyst surface in steps, and N is adsorbed in steps.
And O are dissociated, nitrogen N 2 is formed in the step, and nitrogen N 2 is desorbed in the step, while oxygen is adsorbed on the catalyst surface, but the adsorbed oxygen is desorbed by energization in the step. The chemical reaction formula of the above steps is as follows.
【００１５】ＮＯ→Ｎ＋Ｏ ２Ｎ→Ｎ2 ２Ｏ＋２ｅ→Ｏ2 また、排ガス中のＣやＨＣが還元剤の役目を果たし、触
媒表面で下記に示す反応式により無害なＣＯ2、Ｈ2Ｏに
変化するため、黒煙、ＨＣの同時低減も図ることができ
る。NO➝N + O 2N➝N 2 2O + 2e➝O 2 Further , C and HC in the exhaust gas serve as a reducing agent, and are converted into harmless CO 2 and H 2 O on the catalyst surface by the reaction formula shown below. Therefore, black smoke and HC can be simultaneously reduced.
【００１６】Ｃ＋Ｏ2 →ＣＯ2 ＣＨn ＋〔（４＋ｎ）／４〕Ｏ2 →ＣＯ2 ＋（ｎ／２）
Ｈ2Ｏ また、図５（Ｂ）において、触媒表面に吸着した酸素と
硫黄は、ＳＯ2 となって脱離する。C + O 2 → CO 2 CH n + [(4 + n) / 4] O 2 → CO 2 + (n / 2)
H 2 O In addition, in FIG. 5B, oxygen and sulfur adsorbed on the catalyst surface become SO 2 and are desorbed.
【００１７】図６および図７は本発明の他の実施例を示
し、図６は制御系の構成図、図７は触媒部材への通電の
制御フローを示す図である。本実施例においては、図６
に示すように、触媒装置３の入口側および出口側にそれ
ぞれＮＯX 濃度センサ１５Ａ、１５Ｂを設け、これらの
検出信号を通電制御装置９に入力するようにしている。6 and 7 show another embodiment of the present invention, FIG. 6 is a block diagram of a control system, and FIG. 7 is a diagram showing a control flow of energization to a catalyst member. In this embodiment, FIG.
As shown in, the catalytic converter 3 on the inlet side and the respective outlet NO X concentration sensor 15A, and 15B is provided, so that to enter these detection signals to the conduction control device 9.
【００１８】図７において、ステップＳ１、Ｓ２で入口
側ＮＯX 濃度ＤA、出口側ＮＯX 濃度ＤBを検出し、ステ
ップＳ３で入口側ＮＯX 濃度ＤAが規定値Ｄ0より大きい
場合には、ステップＳ４でＮＯX 低減率Ｐ（％）＝
〔（ＤA−ＤB）／ＤA〕×１００を算出し、ステップＳ
５でＮＯX 低減率Ｐが規定値Ｐ0以下の場合には、ステ
ップＳ６に進み、触媒部材７への通電をオンし、通電開
始からの経過時間Ｔ２が規定時間ｔ２（例えば１０秒）
を越えた場合に、触媒部材７への通電をオフし、以後こ
の処理を繰り返すことにより入口側ＮＯX 濃度ＤAとＮ
ＯX 低減率Ｐにより、触媒部材７への通電を制御するよ
うにしている。In FIG. 7, the inlet side NO x concentration D A and the outlet side NO x concentration D B are detected in steps S1 and S2, and when the inlet side NO x concentration D A is larger than the specified value D 0 in step S3. Is the NO X reduction rate P (%) =
[(D A −D B ) / D A ] × 100 is calculated, and step S
If the NO X reduction rate P is less than or equal to the specified value P 0 in step 5, the process proceeds to step S6, the energization of the catalyst member 7 is turned on, and the elapsed time T2 from the start of energization is the specified time t2 (eg, 10 seconds)
If it exceeds, turns off the power supply to the catalyst member 7, the inlet-side NO X concentration by subsequent repeat this process D A and N
The O X reduction rate P, so as to control the energization of the catalyst member 7.
【００１９】図８および図９は本発明の他の実施例を示
し、図８は制御系の構成図、図９（Ａ）は触媒部材への
通電の制御フローを示す図、図９（Ｂ）は制御用データ
の構成を示す図である。本実施例においては、図８に示
すように、エンジン１にエンジン回転数センサ１６およ
びエンジン負荷センサ１７を設け、これらの検出信号を
通電制御装置９に入力するようにしている。8 and 9 show another embodiment of the present invention, FIG. 8 is a block diagram of a control system, FIG. 9 (A) is a diagram showing a control flow of energization to a catalyst member, and FIG. 9 (B). 10] is a diagram showing a structure of control data. In the present embodiment, as shown in FIG. 8, the engine 1 is provided with an engine speed sensor 16 and an engine load sensor 17, and detection signals of these are input to the energization control device 9.
【００２０】図９（Ａ）において、ステップＳ１、Ｓ２
でエンジン回転数Ｎ、エンジン負荷Ｌを検出し、ステッ
プＳ３で図９（Ｂ）に示す制御用マップからそのときの
エンジン回転数Ｎとエンジン負荷Ｌに対応したＮＯX 排
出量を読み取り、ステップＳ４でＮＯX 積算値Ｑを演算
し、ステップＳ５でＮＯX 積算値Ｑが規定値Ｑ0以上の
場合には、ステップＳ６に進み、触媒部材７への通電を
オンし、通電開始からの経過時間Ｔ２が規定時間ｔ２
（例えば１０秒）を越えた場合に、触媒部材７への通電
をオフし、ＮＯX 積算値ＱをクリアしてステップＳ１に
戻り、以後この処理を繰り返すことにより、エンジン回
転数Ｎとエンジン負荷Ｌから求められるＮＯX 積算値に
より、触媒部材７への通電を制御するようにしている。In FIG. 9A, steps S1 and S2 are performed.
The engine speed N and the engine load L are detected in step S3, the NO x emission amount corresponding to the engine speed N and the engine load L at that time is read from the control map shown in FIG. 9B in step S3, and step S4 The NO X integrated value Q is calculated in step S5, and when the NO X integrated value Q is equal to or greater than the specified value Q 0 in step S5, the process proceeds to step S6, the energization of the catalyst member 7 is turned on, and the elapsed time from the start of energization. T2 is the specified time t2
When it exceeds (for example, 10 seconds), the energization to the catalyst member 7 is turned off, the NO X integrated value Q is cleared, and the process returns to step S1. By repeating this process thereafter, the engine speed N and the engine load are reduced. The energization to the catalyst member 7 is controlled by the NO X integrated value obtained from L.
【００２１】図１０は、本発明の排気ガス浄化用触媒装
置の他の実施例を示す全体構成図である。エンジン１に
接続された排気管２には、本発明に係わる触媒装置３が
配設されている。触媒装置３は、チャンバー５内に配設
された導電性材料からなる触媒部材７と、マイクロ波発
生装置１９に接続されたアンテナ２０から構成され、マ
イクロ波発生装置１９は、前記実施例と同様の通電制御
装置９に接続されている。本実施例では触媒部材７を一
枚のプレート状にしているが、間隔を置いて複数枚を配
設してもよく、また、プレート状に限定されるものでは
なく、図１および図２に示した触媒部材７を採用しても
よい。FIG. 10 is an overall configuration diagram showing another embodiment of the exhaust gas purifying catalyst device of the present invention. The exhaust pipe 2 connected to the engine 1 is provided with the catalyst device 3 according to the present invention. The catalyst device 3 is composed of a catalyst member 7 made of a conductive material, which is disposed in the chamber 5, and an antenna 20 connected to a microwave generator 19. The microwave generator 19 is the same as that in the above-mentioned embodiment. Is connected to the energization control device 9. In the present embodiment, the catalyst member 7 is in the form of a single plate, but a plurality of catalyst members may be arranged at intervals, and the present invention is not limited to the plate shape. The catalyst member 7 shown may be adopted.
【００２２】本実施例においては、マイクロ波発生装置
１９に接続されたアンテナ２０からマイクロ波が放電さ
れ、触媒部材７の表面に均一に電流を流すため、触媒部
材７上吸着した酸素をより効果的に脱離させることがで
きる。また、ＮＯX と反応する触媒部材７の形状を任意
のものにすることが可能となる。制御方法は前記実施例
と同様であるので説明を省略する。In the present embodiment, the microwave is discharged from the antenna 20 connected to the microwave generator 19 and a current is evenly applied to the surface of the catalyst member 7, so that the oxygen adsorbed on the catalyst member 7 is more effective. Can be desorbed. Further, it becomes possible to make the shape of the catalyst member 7 that reacts with NO X arbitrary. The control method is the same as that of the above-mentioned embodiment, and therefore its explanation is omitted.
【００２３】[0023]
【発明の効果】以上の説明から明らかなように本発明に
よれば、エンジンの排気中のＮＯX 等の有害成分を低減
させるための触媒装置において、触媒上に吸着した酸素
等の被毒物質を除去することができる。また、排ガス中
のＣやＨＣが還元剤の役目を果たし、触媒表面で無害な
ＣＯ2、Ｈ2Ｏに変化するため、黒煙、ＨＣの同時低減も
図ることができる。As is apparent from the above description, according to the present invention, a poisoning substance such as oxygen adsorbed on a catalyst is provided in a catalyst device for reducing harmful components such as NO x in engine exhaust gas. Can be removed. Further, since C and HC in the exhaust gas serve as a reducing agent and are converted into harmless CO 2 and H 2 O on the catalyst surface, it is possible to simultaneously reduce black smoke and HC.
【図１】本発明の排気ガス浄化用触媒装置の１実施例を
示し、図１（Ａ）は全体構成図、図１（Ｂ）〜図１
（Ｅ）は触媒部材の各種例を示す図である。1 shows an embodiment of an exhaust gas purifying catalyst device of the present invention, FIG. 1 (A) is an overall configuration diagram, and FIG. 1 (B) to FIG.
(E) is a figure which shows various examples of a catalyst member.
【図２】触媒部材の他の例を示す図である。FIG. 2 is a diagram showing another example of a catalyst member.
【図３】本発明における触媒部材への通電の制御フロー
を示す図である。FIG. 3 is a diagram showing a control flow of energization to a catalyst member in the present invention.
【図４】本発明における実験結果を示す図である。FIG. 4 is a diagram showing an experimental result in the present invention.
【図５】本発明の作用を説明するための概念図である。FIG. 5 is a conceptual diagram for explaining the operation of the present invention.
【図６】本発明の他の実施例を示す制御系の構成図であ
る。FIG. 6 is a configuration diagram of a control system showing another embodiment of the present invention.
【図７】図６の実施例における触媒部材へ通電の制御フ
ローを示す図である。7 is a diagram showing a control flow of energizing the catalyst member in the embodiment of FIG.
【図８】本発明の他の実施例を示す制御系の構成図であ
る。FIG. 8 is a configuration diagram of a control system showing another embodiment of the present invention.
【図９】図９（Ａ）は図８の実施例における触媒部材へ
の通電の制御フローを示す図、図９（Ｂ）は制御用デー
タを示す図である。9 (A) is a diagram showing a control flow of energization to the catalyst member in the embodiment of FIG. 8, and FIG. 9 (B) is a diagram showing control data.
【図１０】本発明の排気ガス浄化用触媒装置の他の実施
例を示す全体構成図である。FIG. 10 is an overall configuration diagram showing another embodiment of the exhaust gas purifying catalyst device of the present invention.
１…エンジン、２…排気管、３…触媒装置、７…触媒部
材、９…通電制御装置 １５Ａ、１５Ｂ…ＮＯX 濃度センサ、１６…エンジン回
転数センサ １７…エンジン負荷センサ、１９…マイクロ波発生装
置、２０…アンテナDESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Exhaust pipe, 3 ... Catalyst device, 7 ... Catalyst member, 9 ... Energization control device 15A, 15B ... NO X concentration sensor, 16 ... Engine speed sensor 17 ... Engine load sensor, 19 ... Microwave generation Device, 20 ... Antenna
Claims (5)
と、該触媒装置内に配設され導電性材料からなる触媒部
材と、該触媒部材への通電を制御する通電制御装置とを
備えたことを特徴とする排気ガス浄化用触媒装置。1. A catalyst device arranged in an exhaust pipe of an engine, a catalyst member arranged in the catalyst device and made of a conductive material, and an energization control device for controlling energization of the catalyst member. An exhaust gas purifying catalyst device.
と、該触媒装置内に配設され導電性材料からなる触媒部
材と、該触媒部材表面に放電するためのマイクロ波発生
装置と、該マイクロ波発生装置への通電を制御する通電
制御装置とを備えたことを特徴とする排気ガス浄化用触
媒装置。2. A catalyst device arranged in an exhaust pipe of an engine, a catalyst member made of a conductive material arranged in the catalyst device, and a microwave generator for discharging to the surface of the catalyst member. An exhaust gas purifying catalyst device, comprising: an energization control device that controls energization of the microwave generator.
放電を制御するようにしたことを特徴とする請求項１ま
たは請求項２記載の排気ガス浄化用触媒装置。3. The exhaust gas purifying catalyst device according to claim 1, wherein energization or discharge to the catalyst member is controlled at regular time intervals.
ぞれＮＯX 濃度センサを設け、入口側ＮＯX 濃度とＮＯ
X 低減率により、触媒部材への通電または放電を制御す
るようにしたことを特徴とする請求項１または請求項２
記載の排気ガス浄化用触媒装置。4. A NO x concentration sensor is provided on each of an inlet side and an outlet side of the catalyst device, the inlet side NO x concentration and the NO x concentration sensor
3. The energization or discharge of the catalyst member is controlled according to the X reduction rate.
The exhaust gas purifying catalyst device described.
するセンサを設け、エンジン回転数とエンジン負荷から
求められるＮＯX 積算値により、触媒部材への通電また
は放電を制御するようにしたことを特徴とする請求項１
または請求項２記載の排気ガス浄化用触媒装置。5. A sensor for detecting an engine speed and an engine load is provided, and energization or discharge to a catalyst member is controlled by a NO x integrated value obtained from the engine speed and the engine load. Claim 1
Alternatively, the exhaust gas purifying catalyst device according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00189695A JP3960435B2 (en) | 1994-05-31 | 1995-01-10 | Exhaust gas purification catalyst device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11835094 | 1994-05-31 | ||
| JP6-118350 | 1994-05-31 | ||
| JP00189695A JP3960435B2 (en) | 1994-05-31 | 1995-01-10 | Exhaust gas purification catalyst device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0849527A true JPH0849527A (en) | 1996-02-20 |
| JP3960435B2 JP3960435B2 (en) | 2007-08-15 |
Family
ID=26335185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00189695A Expired - Lifetime JP3960435B2 (en) | 1994-05-31 | 1995-01-10 | Exhaust gas purification catalyst device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3960435B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19646025A1 (en) * | 1996-11-08 | 1998-05-20 | Heinrich Schuermann | Heating arrangement for a catalyst |
| JP2013113251A (en) * | 2011-11-30 | 2013-06-10 | Toyota Motor Corp | Electrically heated exhaust purifying system |
| JPWO2013035156A1 (en) * | 2011-09-06 | 2015-03-23 | トヨタ自動車株式会社 | Electric heating catalyst |
-
1995
- 1995-01-10 JP JP00189695A patent/JP3960435B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19646025A1 (en) * | 1996-11-08 | 1998-05-20 | Heinrich Schuermann | Heating arrangement for a catalyst |
| DE19646025C2 (en) * | 1996-11-08 | 1999-07-01 | Heinrich Schuermann | Heating arrangement for a catalyst |
| JPWO2013035156A1 (en) * | 2011-09-06 | 2015-03-23 | トヨタ自動車株式会社 | Electric heating catalyst |
| JP2013113251A (en) * | 2011-11-30 | 2013-06-10 | Toyota Motor Corp | Electrically heated exhaust purifying system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3960435B2 (en) | 2007-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102289646B1 (en) | Electrical Elements in Exhaust for NOx Storage Catalysts and SCR Systems | |
| KR101114167B1 (en) | Apparatus and method for regenerating catalyst for purifying exhaust gas | |
| US7207169B2 (en) | System and method for purifying an exhaust gas | |
| EP1544425B1 (en) | Exhaust gas treating apparatus | |
| JPH06262032A (en) | Gas purifier | |
| JP2009270560A (en) | Exhaust emission control device | |
| JPH11210451A (en) | Exhaust emission control catalyst device of internal combustion engine | |
| JP3094323B2 (en) | Method and catalyst device for reducing harmful substances in exhaust gas of an internal combustion engine | |
| JP2002089246A (en) | Exhaust emission control method and exhaust emission control device for internal combustion engine | |
| JP4591164B2 (en) | Exhaust gas purification method and exhaust gas purification device | |
| US20040216448A1 (en) | Method of desulfation of nox-adsorbers | |
| JP2011064161A (en) | Exhaust emission control device using plasma discharge | |
| JPH0849527A (en) | Exhaust emission controlling catalyst device | |
| JPH05285387A (en) | Catalyst for purification of exhaust gas and purification method | |
| US7181903B2 (en) | Exhaust gas purifying apparatus and method of using the same | |
| JPH0615141A (en) | Method and device for purifying exhaust emission containing harmful substance by heterogeneous catalust | |
| JP2003093887A (en) | Catalyst for cleaning exhaust gas and exhaust gas cleaning device | |
| JP2002138824A (en) | Exhaust emission control device for internal combustion engine | |
| JP3262148B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP4582806B2 (en) | Exhaust gas purification device | |
| US6908596B2 (en) | Exhaust gas processing system | |
| JP4114581B2 (en) | Exhaust purification device | |
| JP2002357120A (en) | Exhaust emission control device | |
| JP2002221027A (en) | Exhaust emission control device for internal combustion engine | |
| JPH0418916A (en) | Method for removing nitrogen oxides |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20051227 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060111 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060213 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060906 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060921 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070509 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070510 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110525 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110525 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120525 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120525 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130525 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130525 Year of fee payment: 6 |
|
| EXPY | Cancellation because of completion of term |