JPH08151919A - Particulated trap for diesel engine - Google Patents
Particulated trap for diesel engineInfo
- Publication number
- JPH08151919A JPH08151919A JP6294595A JP29459594A JPH08151919A JP H08151919 A JPH08151919 A JP H08151919A JP 6294595 A JP6294595 A JP 6294595A JP 29459594 A JP29459594 A JP 29459594A JP H08151919 A JPH08151919 A JP H08151919A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- heater
- particulate trap
- diesel engine
- trap
- 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.)
- Pending
Links
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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はディーゼルエンジンの排
気ガス中のカーボン等の微粒子(パティキュレート)を
捕集・除去するためのパティキュレートトラップに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particulate trap for collecting and removing fine particles (particulates) such as carbon in exhaust gas of a diesel engine.
【0002】[0002]
【従来の技術】自動車の排気ガスは、大気汚染の大きな
原因の一つで、排気ガスに含まれる有害成分を除去する
技術は極めて重要である。2. Description of the Related Art Exhaust gas from an automobile is one of the major causes of air pollution, and a technique for removing harmful components contained in the exhaust gas is extremely important.
【0003】特にディーゼルエンジン車においては、主
にNOxとカーボンを主体とする微粒子(パティキュレ
ート)の除去が重要な課題である。Particularly in diesel engine vehicles, the removal of fine particles (particulates) mainly composed of NOx and carbon is an important issue.
【0004】これらの有害成分を除去するために、EG
R(排気再循環)をかけたり、燃料噴射系の改善を行っ
たり、エンジン側での努力も行われているが、抜本的な
決め手がなく、排気通路に排気トラップを設置し、パテ
ィキュレートをトラップによって捕集し、後処理により
除去することが提案されている。現在まで、この後処理
法が最も実用的であると考えられ、検討が続けられてい
る。In order to remove these harmful components, EG
Although R (exhaust gas recirculation) is applied, the fuel injection system is improved, and efforts are being made on the engine side, there is no fundamental deciding factor, and an exhaust trap is installed in the exhaust passage to make particulates. It is proposed to collect by trap and remove by post-treatment. To date, this post-treatment method is considered to be the most practical and is being studied.
【0005】捕集したパティキュレートの後処理は、ト
ラップの繰り返し使用のために燃焼させるのが最もよ
い。その燃焼によるパティキュレートトラップの再生方
法としては、軽油バーナを利用したパティキュレート焼
却も検討されているが、安全性や制御のし易さなどの観
点から現状では電気ヒータによる燃焼再生が最も有望視
され、現にその電気ヒータを採用したパティキュレート
トラップが(1) 特開平5−22290号公報、(2) 同平
6−257422号公報、(3) 同じく平6−26472
2号公報などで提案されている。The post-treatment of the collected particulates is best burned for repeated use of the trap. As a method of regenerating the particulate trap by the combustion, particulate incineration using a light oil burner is also considered, but from the viewpoint of safety and ease of control, combustion regeneration by an electric heater is the most promising at present. A particulate trap that actually employs the electric heater is (1) JP-A-5-22290, (2) JP-A-6-257422, (3) The same as JP-A-6-26472.
It is proposed in Japanese Patent Publication No. 2 and the like.
【0006】[0006]
【発明が解決しようとする課題】前掲の公報のうち、
(2) の公報は700Wの、また(3) の公報は800Wの
電気ヒータ使用時の再生状況について触れているが、こ
のような高出力ヒータを採用したパティキュレートトラ
ップは、現状の自動車電装品(バッテリ、オルタネー
タ、リレー等)の容量から考えると、トラック、バス等
の大型車でなければその使用が許容されない。中、小型
車の場合、搭載バッテリの能力に限界があるため、ヒー
タの消費電力を下げて再生を行う必要がある。[Problems to be Solved by the Invention]
The publication of (2) mentions the regeneration status when using an electric heater of 700 W, and the publication of (3) mentions 800 W. However, the particulate trap adopting such a high output heater is used for the current automobile electrical equipment. Considering the capacity of the battery, alternator, relay, etc., its use is not allowed unless it is a large vehicle such as a truck or bus. In the case of medium-sized and small-sized vehicles, it is necessary to reduce the power consumption of the heater to perform regeneration because the capacity of the on-board battery is limited.
【0007】この場合に問題となるのは、いかにして捕
集したパティキュレートの燃焼効率を高めるかである。
例えば、従来のトラップを用いて他の仕様を変えずにヒ
ータ出力だけを下げたとすると、加熱不足でパティキュ
レートがうまく燃焼せず、パティキュレート捕集によっ
て高まるフィルタ出入口間の差圧の回復率が低くなって
フィルタ性能が悪くなる。The problem in this case is how to increase the combustion efficiency of the collected particulates.
For example, if the conventional trap is used and only the heater output is lowered without changing the other specifications, the particulates will not burn well due to insufficient heating, and the recovery rate of the differential pressure between the filter inlet and outlet will increase due to particulate collection. It becomes low and the filter performance deteriorates.
【0008】また、従来のパティキュレートトラップの
サイズ、能力を何割か縮小する方法で消費電力を下げる
と、フィルタの差圧寿命やパティキュレート捕集効率に
問題が出る。Further, if the power consumption is reduced by a method of reducing the size and capacity of the conventional particulate trap by some percentage, there arises a problem in the differential pressure life of the filter and the particulate collection efficiency.
【0009】パティキュレートトラップは、フィルタの
差圧回復率が高いことは勿論、差圧寿命が長く、パティ
キュレートの捕集効率にも優れることが要求されるの
で、これ等の性能を維持してヒータの消費電力を下げる
工夫が必要である。The particulate trap is required not only to have a high differential pressure recovery rate of the filter, but also to have a long differential pressure life and an excellent particulate collection efficiency. Therefore, these performances are maintained. It is necessary to devise to reduce the power consumption of the heater.
【0010】本発明は、この要求に応えたパティキュレ
ートトラップを提供することを課題としている。An object of the present invention is to provide a particulate trap that meets this demand.
【0011】[0011]
【課題を解決するための手段】上記の課題を解決するた
め、本発明においては、耐熱性材料から成るフィルタの
排気ガス流入面に面状の再生用ヒータを所定間隔をあけ
て対面させた構造を持つディーゼルエンジン用パティキ
ュレートトラップにおいて、前記再生用ヒータの出力を
400W以下とし、さらに、ヒータとフィルタは、ヒー
タによる単位面積当りのフィルタ加熱量が0.60W/
cm2 以上となるところまで長さを縮め、かつ、それに
よるフィルタの表面積減少をフィルタ厚みの増加で補う
構造を採用したのである。In order to solve the above problems, in the present invention, a structure in which a sheet-like regeneration heater is faced with a predetermined interval on the exhaust gas inflow surface of a filter made of a heat resistant material. In the diesel engine particulate trap, the output of the regeneration heater is set to 400 W or less, and the heater and the filter have a filter heating amount of 0.60 W / unit area by the heater.
The structure was adopted in which the length was shortened to a value of cm 2 or more, and the decrease in the surface area of the filter due to it was compensated by the increase in the filter thickness.
【0012】なお、フィルタの材料は、三次元網状金属
多孔体、セラミックファイバ、金属不織布の中のどれか
一種、もしくはそれ等の組合わせ物が耐熱性に優れ、圧
損も小さくて好ましい。The filter material is preferably any one of a three-dimensional reticulated metal porous body, a ceramic fiber, a metal nonwoven fabric, or a combination thereof, because it has excellent heat resistance and a small pressure loss.
【0013】また、フィルタは穴の一端を行き止まりに
した一重の円筒状フィルタ、又は異径円筒状のフィルタ
を同心配置して筒の内外に生じる空間を一端側と他端側
で交互に行き止まりにした多重円筒状のフィルタ、もし
くは平板フィルタを平行に配して平板間の空間の一端側
と他端側を交互に行き止まりにした平行平板フィルタが
表面積(濾過面積)を広く確保できて好ましい。Further, the filter has a single cylindrical filter having one end of a hole as a dead end, or a cylindrical filter having a different diameter is concentrically arranged so that a space generated inside and outside the cylinder is alternately dead end at one end side and the other end side. It is preferable to use the above-mentioned multi-cylindrical filter or a parallel plate filter in which flat plate filters are arranged in parallel so that one end side and the other end side of the space between the flat plates are alternately dead ends because a large surface area (filtration area) can be secured.
【0014】さらに、フィルタを、排気ガス流入側ほど
目の粗い材料の積層材で形成すると、フィルタ厚みを厚
くしても厚み方向の全域でパティキュレートが平均的に
捕集され、目詰りによる差圧寿命の低下が起こり難い。Further, when the filter is formed of a laminated material of a material having a coarser material toward the exhaust gas inflow side, even if the filter thickness is increased, the particulates are collected evenly in the entire area in the thickness direction, resulting in a difference due to clogging. Pressure life is less likely to decrease.
【0015】このほか、ヒータ出力を400W以下に規
制した本発明のパティキュレートトラップは、諸性能を
バランスよく発揮させるため、フィルタの全長を220
mm以下、フィルタ厚みを4mm以上とするのが望まし
い。In addition, in the particulate trap of the present invention in which the heater output is regulated to 400 W or less, the total length of the filter is 220 in order to achieve various performances in a balanced manner.
It is desirable that the filter thickness is 4 mm or less and the filter thickness is 4 mm or more.
【0016】[0016]
【作用】ヒータとフィルタの全長を短くすることは、ヒ
ータ側から見れば、同一電力での加熱温度を高くする効
果がある。これにより、フィルタとヒータの温度差を大
きく採ることができ、結果としてヒータからフィルタへ
の伝熱効率が向上する。特に、輻射伝熱量は温度の4乗
に比例して増大するため、効果が大きい。The shortening of the total length of the heater and the filter has the effect of raising the heating temperature with the same electric power when viewed from the heater side. As a result, the temperature difference between the filter and the heater can be made large, and as a result, the efficiency of heat transfer from the heater to the filter is improved. In particular, the radiant heat transfer amount increases in proportion to the fourth power of the temperature, so that the effect is great.
【0017】また、フィルタの全長を短くすることは、
フィルタに移ってそこから外部に逃げる熱の放熱面を小
さくすることにもなり、熱損失も抑えられる。Also, shortening the total length of the filter is
It also reduces the heat dissipation surface of the heat that moves to the filter and escapes to the outside, and also suppresses heat loss.
【0018】一方、フィルタ長が短くなるとその分フィ
ルタ表面積が減少し、フィルタの目詰りが早まって差圧
寿命が短かくなるが、本発明ではフィルタ厚みの増加に
よって表面積減少を補っているので、差圧寿命が大きく
低下することが無い。特に、フィルタの目の粗さをフィ
ルタ厚み方向に変化させて厚み方向の全域でパティキュ
レートを平均的に捕集できるようにしたものは、この点
に関する効果が大きい。On the other hand, when the filter length is shortened, the filter surface area is reduced accordingly, and the filter is clogged earlier to shorten the differential pressure life. However, in the present invention, the increase in the filter thickness compensates for the decrease in the surface area. The differential pressure life is not significantly reduced. Particularly, the filter in which the roughness of the filter is changed in the thickness direction of the filter so that the particulates can be collected evenly in the entire thickness direction has a great effect on this point.
【0019】なお、本発明では先に述べた伝熱効率の向
上と熱損失の低減効果により、フィルタ厚みを厚くした
にもかかわらず、高い差圧回復率が得られる。According to the present invention, due to the above-described effect of improving the heat transfer efficiency and reducing the heat loss, a high differential pressure recovery rate can be obtained even though the filter thickness is increased.
【0020】[0020]
【実施例】以下に、本発明の実施例について述べる。EXAMPLES Examples of the present invention will be described below.
【0021】図1に実験装置を示す。この装置は、34
00cc、4気筒の直噴射式のディーゼルエンジン車と
シャシダイナモメータとダイリューショントンネルから
なる。FIG. 1 shows an experimental apparatus. This device is
00cc consists of a 4-cylinder direct injection diesel engine vehicle, chassis dynamometer and dilution tunnel.
【0022】図2は本発明のディーゼルエンジン用パテ
ィキュレートトラップの一具体例である。このパティキ
ュレートトラップは、異径の筒状のフィルタ1、2を同
心的に組合わせてそれ等の間に電気ヒータ3を配置し、
このヒータ付きフィルタエレメント10を図1に示す容
器11中に装着して構成される。図3は図2のヒータ付
きフィルタエレメント10の断面図である。排気ガスは
フィルタ1、2間に導入され、各フィルタを通過してフ
ィルタ1の外側とフィルタ2の内側に流れる。このガス
の流れを作るために、ガス流入側と反対側の端面はガス
ケットを介在させて鉄板4でシールしてある。FIG. 2 shows a specific example of the particulate trap for a diesel engine of the present invention. In this particulate trap, cylindrical filters 1 and 2 having different diameters are concentrically combined, and an electric heater 3 is arranged between them.
The heater-equipped filter element 10 is mounted in the container 11 shown in FIG. FIG. 3 is a sectional view of the filter element 10 with a heater shown in FIG. The exhaust gas is introduced between the filters 1 and 2, passes through each filter, and flows to the outside of the filter 1 and the inside of the filter 2. In order to create this gas flow, the end surface on the side opposite to the gas inflow side is sealed with an iron plate 4 with a gasket interposed.
【0023】(実験例1)図2、3に示すフィルタエレ
メントとして、住友電気工業(株)製のNi基3次元網
状構造多孔体(商品名:セルメット)をNi−Cr化し
た筒体を用いた。ヒータ3は、インコネル薄板を打ち抜
き、抵抗調整を行って筒状に加工し、これを直接通電に
より発熱させるようにした。(Experimental Example 1) As the filter element shown in FIGS. 2 and 3, a cylindrical body of Ni-Cr made of Ni-based three-dimensional network structure porous body (trade name: Celmet) manufactured by Sumitomo Electric Industries, Ltd. is used. I was there. The heater 3 was formed by punching out an Inconel thin plate, adjusting the resistance, and processing it into a tubular shape, which was directly energized to generate heat.
【0024】また、ここでの抵抗調整は、ヒータ長に関
係なく、12V印加時にヒータ電力が400Wとなるよ
うにした。なお、ヒータ3は、パンチングメタル、エキ
スパンドメタル、金網、或いは多孔質金属の筒を熱媒体
にしてこれにヒースヒータを巻付けたものなども考えら
れる。In addition, the resistance adjustment here is such that the heater power becomes 400 W when 12 V is applied regardless of the heater length. The heater 3 may be a punching metal, an expanded metal, a metal net, or a porous metal tube used as a heat medium and a heat heater wound around the heat medium.
【0025】このようにして表1に示す諸元(併せて図
6を参照)の比較例1〜3及び実施例1〜3のヒータ付
きフィルタエレメントを作製した。In this way, the filter elements with heaters of Comparative Examples 1 to 3 and Examples 1 to 3 having the specifications shown in Table 1 (see also FIG. 6) were produced.
【0026】次に、これ等の各試料の再生性能について
調べた。Next, the reproduction performance of each of these samples was examined.
【0027】実験は、図2に示す形状のヒータ付きフィ
ルタエレメント10を、図1の容器11内にセットし、
1800rpm、1/4負荷の運転条件でフィルタエレ
メントにパティキュレートをその堆積量が1.5gにな
るまで捕集させた。In the experiment, the heater-equipped filter element 10 having the shape shown in FIG. 2 was set in the container 11 shown in FIG.
Under the operating conditions of 1800 rpm and 1/4 load, particulate matter was collected in the filter element until the accumulated amount became 1.5 g.
【0028】その後、アイドリング運転条件による排気
ガス(酸素濃度18%、温度100℃、ノルマル流量2
0リットル/min)雰囲気下で低電圧電源より12V
の電圧をヒータに10分間印加してパティキュレート燃
焼によるフィルタ再生を行い、それぞれのフィルタエレ
メントにつき、次式で定義する差圧回復率を求めて再生
性能を比較した。 差圧回復率={1−A/B}×100(%) A=(再生後のフィルタ差圧)−(捕集前のフィルタ差
圧) B=(捕集後のフィルタ差圧)−(捕集前のフィルタ差
圧) その結果を表1に併せて示す。Then, the exhaust gas under the idling operation condition (oxygen concentration 18%, temperature 100 ° C., normal flow rate 2
0V / min) 12V from low voltage power supply in atmosphere
The voltage was applied to the heater for 10 minutes to perform filter regeneration by particulate combustion, and for each filter element, the differential pressure recovery rate defined by the following equation was determined and the regeneration performance was compared. Differential pressure recovery rate = {1-A / B} × 100 (%) A = (filter differential pressure after regeneration)-(filter differential pressure before collection) B = (filter differential pressure after collection)-( Filter differential pressure before collection) The results are also shown in Table 1.
【0029】[0029]
【表1】 [Table 1]
【0030】これから判るように、本発明品はいずれも
差圧回復率が80%を越えており、中、小型車用のパテ
ィキュレートトラップとして充分に通用する。As can be seen from the above, each of the products of the present invention has a differential pressure recovery rate of more than 80% and can be sufficiently used as a particulate trap for medium and small vehicles.
【0031】(実験例2)表2に示す材質のフィルタ材
で図4に示す一重のヒータ付き筒状フィルタエレメント
20(実施例7及び8)と、図5に示すように、平板フ
ィルタ5を平行に配して各平板フィルタ間の隙間の一端
と他端を交互に行き止まりにし、その隙間の両側は前述
の容器10で塞ぐ構造にしたヒータ付き平行平板フィル
タエレメント20(実施例9)と、図2、図3に示す二
重筒のヒータ付き筒状フィルタエレメント30(実施例
10)を作った。(Experimental Example 2) A single filter element 20 with a heater shown in FIG. 4 (Examples 7 and 8) made of the filter material shown in Table 2 and a flat plate filter 5 as shown in FIG. A parallel plate filter element with a heater 20 (Embodiment 9) having a structure in which one end and the other end of the gap between the flat plate filters are alternately arranged to be dead ends and both ends of the gap are closed with the container 10 described above, A double-walled tubular filter element with a heater 30 (Example 10) shown in FIGS. 2 and 3 was produced.
【0032】これ等は、いずれも12V印加時に表2に
示すヒータ電力となるようにインコネル薄板で作ったヒ
ータ3の抵抗調整を行った。また、フィルタとヒータの
サイズはフィルタの単位面積当りの加熱量が表2に示す
値となるように調整した。In each of these, the resistance of the heater 3 made of an Inconel thin plate was adjusted so that the heater power shown in Table 2 was obtained when 12 V was applied. The sizes of the filter and the heater were adjusted so that the heating amount per unit area of the filter was the value shown in Table 2.
【0033】この試料を用いて実験例1と同様の実験を
行った。その結果、差圧回復率は表2に併記した値が得
られ、フィルタ材質が一重の筒状、或いは平行平板タイ
プである場合にも優れた結果が得られることが証明され
た。An experiment similar to that of Experimental Example 1 was conducted using this sample. As a result, the differential pressure recovery rate was obtained as shown in Table 2, and it was proved that excellent results were obtained even when the filter material was a single cylinder or a parallel plate type.
【0034】[0034]
【表2】 [Table 2]
【0035】[0035]
【発明の効果】以上説明したように、本発明のパティキ
ュレートトラップは、ヒータとフィルタの長さを縮めて
伝熱効率を向上させると同時に熱損失を低減し、さら
に、フィルタ長の短縮によるフィルタ表面積の減少をフ
ィルタ厚みの増加で補う構造にしたので、捕集性能をさ
ほど低下させずに400W以下のヒータ電力で高い差圧
回復率を得ることができる。そのため、電装品の容量が
小さい中、小型のディーゼルエンジン車にもパティキュ
レートトラップを採用することが可能となり、環境浄化
に役立つ。As described above, the particulate trap of the present invention shortens the length of the heater and the filter to improve the heat transfer efficiency and at the same time reduces the heat loss, and further reduces the filter surface area by shortening the filter length. Since the structure is made up to compensate for the decrease in the filter thickness by increasing the filter thickness, it is possible to obtain a high differential pressure recovery rate with a heater power of 400 W or less without significantly lowering the collection performance. Therefore, it becomes possible to adopt a particulate trap even for a small diesel engine vehicle while the capacity of electric components is small, which is useful for environmental purification.
【図面の簡単な説明】[Brief description of drawings]
【図1】再生性能の評価に用いた実験装置の概要図FIG. 1 is a schematic diagram of an experimental device used for evaluation of reproduction performance.
【図2】本発明のパティキュレートトラップの主要素
(ヒータ付きフィルタエレメント)を示す斜視図FIG. 2 is a perspective view showing a main element (heater-equipped filter element) of the particulate trap of the present invention.
【図3】同上のヒータ付きフィルタエレメントの断面図FIG. 3 is a cross-sectional view of the filter element with a heater of the above.
【図4】本発明のトラップに用いるヒータ付きフィルタ
エレメントの他の例を示す斜視図FIG. 4 is a perspective view showing another example of a filter element with a heater used in the trap of the present invention.
【図5】本発明のトラップに用いるヒータ付きフィルタ
エレメントの他の例を示す斜視図FIG. 5 is a perspective view showing another example of a filter element with a heater used in the trap of the present invention.
【図6】実験に用いたフィルタエレメントの寸法諸元を
示す図FIG. 6 is a diagram showing dimensions of a filter element used in an experiment.
1、2 筒状フィルタ 3、13 ヒータ 4 鉄板 5 平板フィルタ 10、20、30 ヒータ付きフィルタエレメント 11 容器 1, 2 Cylindrical filter 3, 13 Heater 4 Iron plate 5 Flat plate filter 10, 20, 30 Heater-equipped filter element 11 Container
Claims (5)
流入面に面状の再生用ヒータを所定間隔をあけて対面さ
せた構造を持つディーゼルエンジン用パティキュレート
トラップにおいて、前記再生用ヒータの出力を400W
以下とし、さらに、ヒータとフィルタは、ヒータによる
単位面積当りのフィルタ加熱量が0.60W/cm2 以
上となるところまで長さを縮め、かつ、それによるフィ
ルタの表面積減少をフィルタ厚みの増加で補ったことを
特徴とするディーゼルエンジン用パティキュレートトラ
ップ。1. In a particulate trap for a diesel engine having a structure in which a sheet-like regeneration heater faces an exhaust gas inflow surface of a filter made of a heat-resistant material at a predetermined interval, the output of the regeneration heater is 400W
Furthermore, the heater and the filter are shortened to a point where the heating amount of the filter per unit area by the heater is 0.60 W / cm 2 or more, and the reduction of the surface area of the filter by the increase of the filter thickness A particulate trap for diesel engines, which has been supplemented.
体、セラミックファイバ、金属不織布の中のどれか一
種、もしくはそれ等の組合わせ物で構成した請求項1記
載のディーゼルエンジン用パティキュレートトラップ。2. The particulate trap for a diesel engine according to claim 1, wherein the filter is made of any one of a three-dimensional reticulated metal porous body, a ceramic fiber, a metal nonwoven fabric, or a combination thereof.
まりにした一重の円筒状フィルタ、又は異径円筒状のフ
ィルタを同心配置して筒の内外に生じる空間を一端側と
他端側で交互に行き止まりにした多重円筒状のフィル
タ、もしくは平板フィルタを平行に配して平板間の空間
の一端側と他端側を交互に行き止まりにした平行平板フ
ィルタのどれかを用いた請求項1又は2記載のディーゼ
ルエンジン用パティキュレートトラップ。3. As the filter, a single cylindrical filter in which one end of a hole is a dead end or a cylindrical filter having a different diameter is concentrically arranged so that spaces generated inside and outside the cylinder are alternately arranged on one end side and the other end side. 3. A dead-end multi-cylindrical filter, or a parallel plate filter in which plate filters are arranged in parallel and one end side and the other end side of the space between the flat plates are alternately made dead ends. Particulate trap for diesel engines.
の粗い材料の積層材で形成した請求項1、2又は3記載
のディーゼルエンジン用パティキュレートトラップ。4. The particulate trap for a diesel engine according to claim 1, 2 or 3, wherein the filter is formed of a laminated material made of a material having a coarser material toward the exhaust gas inflow side.
フィルタ厚みを4mm以上とした請求項1乃至4記載の
いずれかに記載のディーゼルエンジン用パティキュレー
トトラップ。5. The total length of the filter is 220 mm or less,
The particulate trap for a diesel engine according to claim 1, wherein the filter has a thickness of 4 mm or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6294595A JPH08151919A (en) | 1994-11-29 | 1994-11-29 | Particulated trap for diesel engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6294595A JPH08151919A (en) | 1994-11-29 | 1994-11-29 | Particulated trap for diesel engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08151919A true JPH08151919A (en) | 1996-06-11 |
Family
ID=17809803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6294595A Pending JPH08151919A (en) | 1994-11-29 | 1994-11-29 | Particulated trap for diesel engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08151919A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5782941A (en) * | 1996-09-23 | 1998-07-21 | Sumitomo Electric Industries, Ltd. | Particulate trap for diesel engine |
EP0879939A2 (en) * | 1997-05-21 | 1998-11-25 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
EP0837228A3 (en) * | 1996-10-18 | 1999-07-07 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
EP1652568A3 (en) * | 2004-10-27 | 2006-06-14 | Robert Bosch Gmbh | Filter device, in particular a particulate filter internal combustion engine exhaust gas |
JP2010013989A (en) * | 2008-07-02 | 2010-01-21 | Horiba Ltd | Evaluation device for exhaust gas after-treatment device |
WO2014034980A1 (en) * | 2012-08-31 | 2014-03-06 | 주식회사 알란텀 | Exhaust gas filtering device using tubular heater |
-
1994
- 1994-11-29 JP JP6294595A patent/JPH08151919A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5782941A (en) * | 1996-09-23 | 1998-07-21 | Sumitomo Electric Industries, Ltd. | Particulate trap for diesel engine |
EP0837228A3 (en) * | 1996-10-18 | 1999-07-07 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
EP0879939A2 (en) * | 1997-05-21 | 1998-11-25 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
EP0879939A3 (en) * | 1997-05-21 | 1999-02-03 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
US6102976A (en) * | 1997-05-21 | 2000-08-15 | Sumitomo Electric Industries, Ltd. | Exhaust gas purifier |
EP1652568A3 (en) * | 2004-10-27 | 2006-06-14 | Robert Bosch Gmbh | Filter device, in particular a particulate filter internal combustion engine exhaust gas |
JP2010013989A (en) * | 2008-07-02 | 2010-01-21 | Horiba Ltd | Evaluation device for exhaust gas after-treatment device |
WO2014034980A1 (en) * | 2012-08-31 | 2014-03-06 | 주식회사 알란텀 | Exhaust gas filtering device using tubular heater |
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