JPH0749021A - Diesel particulate filter - Google Patents
Diesel particulate filterInfo
- Publication number
- JPH0749021A JPH0749021A JP5212334A JP21233493A JPH0749021A JP H0749021 A JPH0749021 A JP H0749021A JP 5212334 A JP5212334 A JP 5212334A JP 21233493 A JP21233493 A JP 21233493A JP H0749021 A JPH0749021 A JP H0749021A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- holes
- diesel particulate
- particulate filter
- particulates
- 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
- F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
-
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Materials (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はディ−ゼルエンジンの排
気ガスに含まれるパティキュレ−トを補集するディ−ゼ
ルパティキュレ−トフィルタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diesel particulate filter which collects particulates contained in exhaust gas of a diesel engine.
【0002】[0002]
【従来の技術】ディ−ゼルエンジンは断熱圧縮による高
温度の圧気中に燃料が噴射されるヘトロジニアス燃焼の
ため、空気と燃料との混合が均一でなく、排気中に未燃
の炭化水素と、カ−ボンの集合によるパティキュレ−ト
が多く含まれて排出される。2. Description of the Related Art Since a diesel engine is a heterogeneous combustion in which fuel is injected into compressed air of high temperature by adiabatic compression, air and fuel are not mixed uniformly, and unburned hydrocarbons are contained in exhaust gas. A large amount of particulates due to the collection of carbon is contained and discharged.
【0003】そして、このようなパティキュレ−トの大
気への放出を防ぐため、これを捕集するフィルタとして
ハニカム構造のパティキュレ−トフィルタが通常、使用
されている。In order to prevent the release of such particulates to the atmosphere, a particulate filter having a honeycomb structure is usually used as a filter for collecting the particulates.
【0004】[0004]
【発明が解決しようとする課題】この種のハニカム型の
フィルタはその構造が複雑で、捕集したパティキュレ−
トを除去する方法に手数を要し、また、フィルタ素子の
通孔径が30〜50μm程度のため、フィルタの容積を
大にしないと排気抵抗が大きくなるという問題がある。The honeycomb type filter of this type has a complicated structure and the collected particulates.
There is a problem that the exhaust resistance becomes large unless the volume of the filter is increased because the method of removing the filter is troublesome and the through hole diameter of the filter element is about 30 to 50 μm.
【0005】本発明はこのような従来の問題を改善しよ
うとするもので、その目的は通孔径の大きな金属のフィ
ルタ素子を用い、通過したパティキュレ−トの微粒子の
性質を利用して効率よく捕集するとともに排気抵抗の小
さいディ−ゼルパティキュレ−トフィルタを提供しよう
とするものである。The present invention is intended to solve such a conventional problem, and an object thereof is to use a metal filter element having a large through-hole diameter and efficiently collect the particles by using the characteristics of fine particles of the passing particulates. An object of the present invention is to provide a diesel particulate filter which collects and has a low exhaust resistance.
【0006】[0006]
【課題を解決するための手段】上述の目的を達成するた
めに本発明によれば、多数の通孔を有するフィルタにデ
ィ−ゼルエンジンの排気ガスを流入させ、該排気ガスに
含まれるパティキュレ−ト捕集し焼却するディ−ゼルパ
ティキュレ−トフィルタにおいて、前記のフィルタは粗
目の通孔を有し櫛歯状の凹凸が連続して形成された薄板
と下流の空間との層を複数組積層したディ−ゼルパティ
キュレ−トフィルタが提供される。To achieve the above object, according to the present invention, exhaust gas of a diesel engine is introduced into a filter having a large number of through holes, and particulates contained in the exhaust gas are introduced. In a diesel particulate filter that collects and incinerates the filter, the filter has a plurality of sets of layers of a thin plate having a through hole and a comb-shaped concavo-convex pattern formed continuously and a downstream space. A diesel particulate filter is provided.
【0007】[0007]
【作用】比較的に粗目の通孔を有する櫛歯状の波状板の
フィルタと空間との層を複数組配置して排気ガスを流入
させるので、フィルタの粗目の通孔を通過した微粒子は
空間にて帯電のため集合して大粒子となり、次段のフィ
ルタの通孔にて捕集されて、この繰返えしによって微細
なものまで捕集できる。Since a plurality of layers of the filter and space of the comb-like corrugated plate having a relatively coarse through hole are arranged to allow the exhaust gas to flow in, the fine particles passing through the coarse through hole of the filter are left in the space. At, the particles are aggregated due to charging and become large particles, which are collected in the through holes of the filter in the next stage, and by repeating this, even minute particles can be collected.
【0008】[0008]
【実施例】つぎに本発明の実施例について図面を用いて
詳細に説明する。図1は本発明にかかるディ−ゼルパテ
ィキュレ−トフィルタの一実施例を示す構成図である。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a diesel particulate filter according to the present invention.
【0009】同図における1は主フィルタ素子で、ニッ
ケルとクロムと鉄との合金板の外面をアルミナまたはジ
ルコニアで被覆した薄板で、100〜300μmの多数
の通孔を有し、断面が図示のように櫛歯状の凹凸が連続
して形成された波状板に加工されており、該櫛歯状の傾
斜面は流路の方向に対して30度以内の角度に設定され
ている。Reference numeral 1 in FIG. 1 is a main filter element, which is a thin plate obtained by coating the outer surface of an alloy plate of nickel, chromium and iron with alumina or zirconia, and has a large number of through holes of 100 to 300 μm, and its cross section is shown in the drawing. As described above, it is processed into a wavy plate in which comb-shaped irregularities are continuously formed, and the comb-shaped inclined surface is set at an angle within 30 degrees with respect to the direction of the flow path.
【0010】そして、複数枚の主フィルタ素子1は後流
の所定の空間11を隔てて積層され、その外周部は電気
の絶縁性のある遮熱材12により覆われて主フィルタケ
−ス10の内部に格納されている。A plurality of main filter elements 1 are laminated with a predetermined space 11 in the wake, and the outer periphery of the main filter element 1 is covered with a heat insulating material 12 having electrical insulation. It is stored inside.
【0011】なお、主フィルタケ−ス10の上流および
下流方向は絞られて、それぞれ上流パイプ13および下
流パイプ14を介し、排気ガスが導入される上流口1
5、および排出される下流口16にそれぞれ連通されて
いる。The upstream and downstream sides of the main filter case 10 are narrowed, and the exhaust gas is introduced through the upstream pipe 13 and the downstream pipe 14, respectively.
5 and the downstream outlet 16 to be discharged, respectively.
【0012】17は主流路制御弁、18は該制御弁を開
閉操作するアクチュエ−タであり、コントロ−ラ3から
の指令によりフィルタ素子1への排気流路を開閉制御す
るものである。なお、19は通電端子で、直列接続され
た主フィルタ素子1の両端部に接続され、主フィルタ素
子1に通電して加熱時にはコントロ−ラ3から電力が供
給される端子である。Reference numeral 17 is a main flow path control valve, and 18 is an actuator for opening and closing the control valve, which controls the opening and closing of the exhaust flow path to the filter element 1 in response to a command from the controller 3. Reference numeral 19 is a current-carrying terminal, which is connected to both ends of the main filter element 1 connected in series and is a terminal to which power is supplied from the controller 3 when the main filter element 1 is energized and heated.
【0013】2は副フィルタ素子で、前記の主フィルタ
素子1と同様にニッケル、クロム、鉄の合金板がアルミ
ナまたはジルコニアで被覆されたもので、櫛歯状の凹凸
を連続して有する波板状に形成されている。なお、排気
ガスを通ずる通孔は前記よりやや小径のものが多数穿孔
され、副フィルタケ−ス20の内部には所定の空間21
を隔てて複数枚の副フィルタ素子2が内蔵されている。Reference numeral 2 denotes a sub-filter element, which is a corrugated plate having a comb-shaped concavo-convex pattern formed by coating an alloy plate of nickel, chromium and iron with alumina or zirconia as in the case of the main filter element 1. It is formed into a shape. In addition, a large number of holes having a diameter slightly smaller than those described above are bored through the exhaust gas, and a predetermined space 21 is provided inside the sub filter case 20.
A plurality of sub-filter elements 2 are built in at intervals.
【0014】また、27は副流路制御弁、28はそのア
クチュエ−タで、コントロ−ラ3の指令により制御され
るもの、29は通電端子で、該端子29に電力が供給さ
れると直列接続された副フィルタ素子2が発熱し推積物
が焼却されるように構成されている。Further, 27 is a sub-flow path control valve, 28 is an actuator thereof, which is controlled by a command of the controller 3, 29 is an energizing terminal, which is connected in series when electric power is supplied to the terminal 29. The sub filter element 2 connected thereto is configured to generate heat and incinerate the deposit.
【0015】つぎにこのように構成された本実施例の作
動を説明すると、主流路制御弁17が開かれて主フィル
タ素子1に排気ガスが導かれ、排気ガス中の大きな粒度
のパティキュレ−トは通孔を通れずに捕集される。そし
て、気体成分や微粒子は通孔を通過して後流に設けた空
間11に開放される。Next, the operation of the present embodiment thus constructed will be described. The main flow path control valve 17 is opened to introduce the exhaust gas to the main filter element 1, and the particulates of large particle size in the exhaust gas are introduced. Is collected without passing through the through hole. Then, the gas component and the fine particles pass through the through holes and are opened to the space 11 provided in the downstream.
【0016】この場合、所定の角度に傾斜した通孔を通
過する微粒子はその通過の際や、解放時に他の微粒子に
衝突して静電気を帯び、図1の拡大図に示すように解放
された空間11にて互いに突き当たるとともに微粒子が
互いに集合して大きな粒子となり、下流の主フィルタ素
子1に流入する。In this case, the fine particles passing through the through hole inclined at a predetermined angle collide with other fine particles at the time of the passage or at the time of releasing, and are charged with static electricity, and are released as shown in the enlarged view of FIG. The particles collide with each other in the space 11 and the particles aggregate with each other to become large particles, which flow into the downstream main filter element 1.
【0017】ここでのフィルタの通孔も粗目で同様のサ
イズであるが、集合して大粒子となったものは通孔を通
過できずに捕集され、微粒子のまつのものは通過する
が、前述のように帯電により次の空間にて大きな粒子に
集合していく。The through holes of the filter here are also coarse and of the same size, but the aggregated and large particles cannot be passed through the through holes and are collected, while the fine particles are passed through. , As described above, the particles are aggregated into large particles in the next space by charging.
【0018】したがって、複数組のフィルタ素子と空間
との層の経由により、比較的に粗目の通孔のフィルタに
しても、排気ガス中の微粒子が捕集されることになる。Therefore, even if the filter has a relatively coarse through hole, the fine particles in the exhaust gas are collected by way of the plurality of sets of the filter element and the space.
【0019】このようにして時間の経過により捕集され
たパティキュレ−トによって目が詰ると、コントロ−ラ
3からの指令により主流路制御弁17が閉弁、副流路制
御弁27が開弁されるとともに、通電端子19に電力が
供給されて堆積物の焼却による再生処理が行われること
になる。When the particulates thus collected with the passage of time clog the eyes, the main flow path control valve 17 is closed and the sub flow path control valve 27 is opened by a command from the controller 3. At the same time, electric power is supplied to the energizing terminal 19 to perform a regeneration process by burning the deposit.
【0020】以上、本発明を上述の実施例によって説明
したが、本発明の主旨の範囲内で種々の変形が可能であ
り、これらの変形を本発明の範囲から排除するものでは
ない。Although the present invention has been described with reference to the above embodiments, various modifications are possible within the scope of the gist of the present invention, and these modifications are not excluded from the scope of the present invention.
【0021】[0021]
【発明の効果】上述の実施例のように本発明によれば、
アルミナで覆った合金板の比較的に粗目のフィルタ板と
空間との層を複数組備えたフィルタに排気ガスを流入さ
せるので、排気ガス中の大きな粒子は捕集され、微粒子
は粗目を通過し下流の空間に開放されるが、その際、帯
電した微粒子は集合して大きな粒子になるため次段のフ
ィルタにより捕集され、この繰返えしによって粗目のフ
ィルタでも排気中の微粒子が効率よく捕集できるという
効果が得られ、また通孔を粗目にしたため排気抵抗の少
ないパティキュレ−トフィルタとなる利点がある。さら
に本発明では櫛歯状の傾斜をガス流方向に対し30°以
内として通過するガス流の混合を図ったので、微粒子同
士の衝突や集合が効率よく行われ、大粒子に成長した後
の捕集効果が向上する。According to the present invention as in the above embodiments,
Exhaust gas is made to flow through a filter that has a plurality of relatively coarse filter plates and layers of an alloy plate covered with alumina, so that large particles in the exhaust gas are collected and fine particles pass through the coarse particles. The particles are released to the space downstream, but at that time, the charged fine particles aggregate into large particles and are collected by the filter in the next stage.By repeating this, even the coarse filter efficiently collects the fine particles in the exhaust gas. The effect of being able to be collected is obtained, and since the through holes are made coarse, there is an advantage that the particulate filter has low exhaust resistance. Further, in the present invention, since the gas flow passing through the comb-shaped inclination within 30 ° with respect to the gas flow direction is mixed, the fine particles collide with each other and are aggregated efficiently, and the trapping after the growth into the large particles is performed. Collective effect is improved.
【図1】本発明の一実施例を示す構成図とその一部拡大
図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention and a partially enlarged view thereof.
1…主フィルタ素子 2…副フィルタ素子 11…空間 12…遮熱材 17…主流路制御弁 21…空間 1 ... Main filter element 2 ... Sub filter element 11 ... Space 12 ... Heat-shielding material 17 ... Main flow path control valve 21 ... Space
───────────────────────────────────────────────────── 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 39/20 ZAB A ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B01D 39/20 ZAB A
Claims (4)
エンジンの排気ガスを流入させ、該排気ガスに含まれる
パティキュレ−ト捕集し焼却するディ−ゼルパティキュ
レ−トフィルタにおいて、前記のフィルタは粗目の通孔
を有し櫛歯状の凹凸が連続して形成された薄板と下流の
空間との層を複数組積層したことを特徴とするディ−ゼ
ルパティキュレ−トフィルタ。1. A diesel particulate filter in which exhaust gas of a diesel engine is caused to flow into a filter having a large number of through holes to collect and incinerate particulates contained in the exhaust gas. A diesel particulate filter comprising a stack of a plurality of layers of a thin plate having coarse through holes and continuously formed with comb-like irregularities and a downstream space.
金板の外面にアルミナかジルコニアかのいずれかを被覆
し、100μm乃至300μmの通孔を多数穿孔したこ
とを特徴とする請求項1記載のディ−ゼルパティキュレ
−トフィルタ。2. The thin plate is characterized in that the outer surface of an alloy plate of nickel, chromium, and iron is coated with either alumina or zirconia, and a large number of through holes of 100 μm to 300 μm are perforated. The described diesel particulate filter.
対し30度以内の角度を備えていることを特徴とする請
求項1記載のディ−ゼルパティキュレ−トフィルタ。3. A diesel particulate filter according to claim 1, wherein said comb-shaped inclined surface of said thin plate has an angle within 30 degrees with respect to the flow path direction.
と、容量の小なる副フィルタと並列に接続し、流路の切
換えによりパティキュレ−トの捕集を行うとともに、副
フィルタの通孔は主フィルタの通孔径より小に形成した
ことを特徴とする請求項1記載のディ−ゼルパティキュ
レ−トフィルタ。4. A main filter having a large capacity and a sub filter having a small capacity are connected in parallel with each other to collect the particulates by switching the flow paths, and the through holes of the sub filter are provided. 2. The diesel particulate filter according to claim 1, wherein the diameter is smaller than the through hole diameter of the main filter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05212334A JP3131081B2 (en) | 1993-08-04 | 1993-08-04 | Diesel Particulate Filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05212334A JP3131081B2 (en) | 1993-08-04 | 1993-08-04 | Diesel Particulate Filter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0749021A true JPH0749021A (en) | 1995-02-21 |
JP3131081B2 JP3131081B2 (en) | 2001-01-31 |
Family
ID=16620824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05212334A Expired - Fee Related JP3131081B2 (en) | 1993-08-04 | 1993-08-04 | Diesel Particulate Filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3131081B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006126123A (en) * | 2004-11-01 | 2006-05-18 | Mitsubishi Electric Corp | Tritium monitor |
-
1993
- 1993-08-04 JP JP05212334A patent/JP3131081B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006126123A (en) * | 2004-11-01 | 2006-05-18 | Mitsubishi Electric Corp | Tritium monitor |
JP4515888B2 (en) * | 2004-11-01 | 2010-08-04 | 三菱電機株式会社 | Tritium monitor |
Also Published As
Publication number | Publication date |
---|---|
JP3131081B2 (en) | 2001-01-31 |
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