JPH05118211A - Exhaust emission control device for diesel engine - Google Patents
Exhaust emission control device for diesel engineInfo
- Publication number
- JPH05118211A JPH05118211A JP3305483A JP30548391A JPH05118211A JP H05118211 A JPH05118211 A JP H05118211A JP 3305483 A JP3305483 A JP 3305483A JP 30548391 A JP30548391 A JP 30548391A JP H05118211 A JPH05118211 A JP H05118211A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- exhaust
- diesel engine
- exhaust gas
- cell
- 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
Landscapes
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，フィルター再生率に優
れ，かつエンジン排圧の圧損を最小限に抑えることがで
きるディーゼルエンジン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 emission control system for a diesel engine, which has an excellent filter regeneration rate and can minimize the pressure loss of engine exhaust pressure.
【０００２】[0002]
【従来技術】ディーゼルエンジンの排気ガス中には排気
黒煙の原因として知られるパティキュレートが含まれて
いる。そこで，このようなパティキュレートが直接大気
中に排出されないようにするために，図６に示すごと
く，ディーゼルエンジン３の排気通路４９には，排気浄
化装置９が設けられている。また，排気通路４９の途中
には，排気浄化装置９を迂回してディーゼルエンジン３
とマフラー５を接続するバイパス４５が配管されてい
る。尚，排気通路４９とバイパス４５の接続部には，排
気切換弁４１が設けられている。2. Description of the Related Art Diesel engine exhaust gas contains particulates known as a cause of exhaust black smoke. Therefore, in order to prevent such particulates from being directly discharged to the atmosphere, an exhaust gas purification device 9 is provided in the exhaust passage 49 of the diesel engine 3 as shown in FIG. Further, in the middle of the exhaust passage 49, the exhaust gas purification device 9 is bypassed to bypass the diesel engine 3
A bypass 45 is connected to connect the muffler 5 and the muffler 5. An exhaust switching valve 41 is provided at the connection between the exhaust passage 49 and the bypass 45.
【０００３】該排気浄化装置９は，ディーゼルエンジン
３の排気ガス７中のパティキュレートを捕集するための
ハニカム型のフィルター８と，該フィルター８を装着す
るトラップ容器９１とを有する。また，フィルター８の
上流側８１には電気ヒータ８５を配設している。そし
て，該フィルター８の内部は，図７，８に示すごとく，
セラミック等で作製された多孔質の隔壁１９で区切られ
ており，ハニカム状の細長いセル６を形成している。該
セル６の両端である上流側８１と下流側８９は，互い違
いに，市松模様状に，セラミック等で作製した閉塞栓１
により閉塞されている。The exhaust gas purification device 9 has a honeycomb type filter 8 for collecting particulates in the exhaust gas 7 of the diesel engine 3 and a trap container 91 in which the filter 8 is mounted. Further, an electric heater 85 is arranged on the upstream side 81 of the filter 8. The inside of the filter 8 is, as shown in FIGS.
The cells are partitioned by porous partition walls 19 made of ceramic or the like to form the honeycomb elongated cells 6. The upstream side 81 and the downstream side 89, which are both ends of the cell 6, are staggered alternately in a checkered pattern and are made of a ceramic or the like.
Is blocked by.
【０００４】このような排気浄化装置の作用機構につい
て以下に説明する。まず，排気切換弁４１はバイパス４
５を封鎖しており，ディーゼルエンジン３の排気ガス７
は排気浄化装置９へと導入される。そして，排気ガス７
は，同図に矢印で示すごとく，排気浄化装置９内のフィ
ルター８に形成されたセル６に入り，次いで隔壁１９を
通過する。この時，排気ガス７に混入しているパティキ
ュレートは隔壁１９により捕集される。そして，パティ
キュレートが除去された排気ガス７は，マフラー５を通
り抜け大気中へ排出される。The operation mechanism of such an exhaust purification system will be described below. First, the exhaust switching valve 41 is the bypass 4
5 blockade, diesel engine 3 exhaust gas 7
Is introduced into the exhaust gas purification device 9. And exhaust gas 7
Enters the cell 6 formed in the filter 8 in the exhaust gas purification device 9, and then passes through the partition wall 19, as shown by the arrow in the figure. At this time, the particulates mixed in the exhaust gas 7 are collected by the partition wall 19. Then, the exhaust gas 7 from which the particulates have been removed passes through the muffler 5 and is discharged into the atmosphere.
【０００５】一方，隔壁１９に堆積したパティキュレー
トは，隔壁１９の目詰りを生じるので，排気浄化装置９
内に装着された電気ヒーター８５の熱により燃焼除去さ
れる。即ち，まず，電気ヒーター８５付近の上流側８１
に付着したパティキュレートが，その熱により着火し，
次第に下流側８９へと伝播していく。なお，この時，排
気ガス７の流れによる燃焼の吹き消しがないようにする
ために，排気切換弁４１は，排気浄化装置９へ通じる排
気通路４９を封鎖し，排気ガス７をバイパス４５へ送流
している。On the other hand, the particulate matter deposited on the partition wall 19 causes the partition wall 19 to be clogged.
It is burnt and removed by the heat of the electric heater 85 mounted inside. That is, first, the upstream side 81 near the electric heater 85
The particulates adhering to the fire ignite due to the heat,
It gradually propagates to the downstream side 89. At this time, in order not to blow out the combustion due to the flow of the exhaust gas 7, the exhaust switching valve 41 blocks the exhaust passage 49 leading to the exhaust purification device 9 and sends the exhaust gas 7 to the bypass 45. It's flowing.
【０００６】[0006]
【解決しようとする課題】しかしながら，従来のフィル
ター８では次の問題点がある。即ち，フィルター８の再
生時には，その上流側８１に付着したパティキュレート
がまず着火し，燃焼が次第に下流側８９に伝播してい
く。しかし，フィルター８は，金属性のトラップ容器９
１に収められているので，燃焼熱が該トラップ容器９１
へ放熱され，そのために燃焼が途中で消えてしまうこと
がある。However, the conventional filter 8 has the following problems. That is, when the filter 8 is regenerated, the particulates adhering to the upstream side 81 are ignited first, and the combustion gradually propagates to the downstream side 89. However, the filter 8 has a metallic trap container 9
1 is stored in the trap container 91.
The heat may be dissipated into the heat, and the combustion may disappear on the way.
【０００７】そのため，パティキュレートの燃え残りに
よるフィルター８の目詰まりが生じ，フィルター８の再
生率が低下する。また，フィルター８の目詰まりは，排
気ガス７の通過を妨げ，ディーゼルエンジン３の排圧の
圧損を大きくする。また，そのため，燃費の悪化やエン
ジン効率の低下を招くことになる。そこで，上記トラッ
プ容器９１への放熱を少なくするために，フィルター８
の外周部のセル６を栓詰めして，その周辺部のセル６を
断熱層にすることが考えられる。この周辺セル断熱部を
設けることによって上記パティキュレート燃焼を促進
し，フィルター再生率を向上させることが考えられる。Therefore, the filter 8 is clogged due to the unburned particulates, and the regeneration rate of the filter 8 is lowered. Further, the clogging of the filter 8 hinders the passage of the exhaust gas 7 and increases the pressure loss of the exhaust pressure of the diesel engine 3. In addition, this leads to deterioration of fuel efficiency and engine efficiency. Therefore, in order to reduce the heat radiation to the trap container 91, the filter 8
It is conceivable to plug the cells 6 in the outer peripheral portion of the above and plug the cells 6 in the peripheral portion into a heat insulating layer. It is conceivable that by providing this peripheral cell heat insulating portion, the particulate combustion is promoted and the filter regeneration rate is improved.
【０００８】しかし，栓詰め範囲を大きくしすぎるとエ
ンジンの排圧が上昇し，エンジン性能の低下を招く。逆
に，栓詰め範囲を小さくしすぎると，トラップ容器への
放熱が大きくなり，パティキュレートの燃え残りが生じ
る。本発明は，かかる問題点に鑑み，フィルター再生率
に優れ，かつエンジン排圧の圧損を最小限に抑えること
ができるディーゼルエンジン排気浄化装置を提供しよう
とするものである。However, if the plugging range is made too large, the exhaust pressure of the engine rises and the engine performance deteriorates. On the other hand, if the plugging range is too small, the amount of heat released to the trap container increases, and particulates remain unburned. In view of the above problems, the present invention aims to provide a diesel engine exhaust gas purification device that has an excellent filter regeneration rate and that can minimize the pressure loss of engine exhaust pressure.
【０００９】[0009]
【課題の解決手段】本発明は，ディーゼルエンジンの排
気ガス中のパティキュレートを捕集するためのハニカム
型のフィルターと，上記排気ガスの排気通路に設けられ
上記フィルターを装着するトラップ容器とを有するディ
ーゼルエンジンの排気浄化装置において，上記フィルタ
ーは，ほぼ平行に設けた複数のセルを有すると共に，フ
ィルターの周辺部には上記セルの上流側及び下流側を共
に閉塞栓により栓詰めした周辺セル断熱部を有してな
り，上記フィルターの直径方向の全断面積に対する周辺
セル断熱部の断面積の割合を示す栓詰率は，１０〜２０
％であることを特徴とするディーゼルエンジンの排気浄
化装置にある。The present invention has a honeycomb type filter for collecting particulates in exhaust gas of a diesel engine, and a trap container provided in the exhaust passage of the exhaust gas and equipped with the filter. In an exhaust emission control device for a diesel engine, the filter has a plurality of cells arranged substantially parallel to each other, and a peripheral cell heat insulation part in which the upstream side and the downstream side of the cell are both plugged with blocking plugs in the peripheral part of the filter. The plugging rate showing the ratio of the cross-sectional area of the peripheral cell heat insulation part to the total cross-sectional area of the filter in the diametrical direction is 10 to 20.
% In a diesel engine exhaust gas purification device.
【００１０】本発明において最も注目すべき点は，フィ
ルターの直径方向の全断面積に対する周辺セル断熱部の
断面積の割合，即ち栓詰率を１０〜２０％としたことで
ある。上記フィルターの内部は，従来と同様に，多孔質
の隔壁で細かく区切られており，ハニカム状の細長いセ
ルを形成している。そして，該セルの両端である上流側
と下流側は，互い違いに市松状に，閉塞栓により閉塞さ
れている。The most notable point in the present invention is that the ratio of the cross-sectional area of the peripheral cell heat insulating portion to the total cross-sectional area in the diameter direction of the filter, that is, the plugging rate is 10 to 20%. The inside of the filter is finely divided by porous partition walls as in the conventional case to form a honeycomb-shaped elongated cell. The upstream side and the downstream side, which are both ends of the cell, are alternately staggered in a checkered pattern and are closed by block plugs.
【００１１】また，フィルターにおける周辺部には，上
流側と下流側の両端を共に閉塞栓により閉塞している周
辺セル断熱部を有する。そして，この周辺セル断熱部の
上記栓詰率は，１０〜２０％である。１０％未満である
と，トラップ容器への放熱が大きくなり，パティキュレ
ートの燃え残りが生じる。一方，２０％を越えると，エ
ンジンの排圧が上昇し，エンジン性能の低下を招く。上
記周辺セル断熱部は，フィルターの周辺部分において，
通気セル部分の上流側と下流側を共に閉塞栓により栓詰
めして設ける。そして，一般には周辺セル断熱部のセル
も，通気セル部分と同じ大きさに形成されている（図１
参照）。しかし，周辺セル断熱部におけるセルの大きさ
は，通気セル部分よりも大きくしてもよい（図５参
照）。なお，上記通気セル部分とは，排気ガスが通過す
る部分のセルをいう。In addition, the peripheral portion of the filter has a peripheral cell heat insulating portion in which both upstream and downstream ends are closed by blocking plugs. The plugging rate of the peripheral cell heat insulation part is 10 to 20%. If it is less than 10%, the heat radiation to the trap container becomes large, and unburned particulates occur. On the other hand, when it exceeds 20%, the exhaust pressure of the engine rises and the engine performance is deteriorated. The above-mentioned peripheral cell heat insulation part is
Both the upstream side and the downstream side of the aeration cell portion are plugged with blocking plugs. In general, the cells of the peripheral cell heat insulation section are also formed to have the same size as the ventilation cell section (Fig. 1).
reference). However, the size of the cell in the peripheral cell heat insulating portion may be larger than that of the ventilation cell portion (see FIG. 5). In addition, the said ventilation cell part means the cell of the part through which exhaust gas passes.
【００１２】上記フィルターは，セラミック等を材料と
して製造する。フィルターは，例えばこれらの材料を粘
稠液に混合し，その混合液をハニカム型の押し出し器に
より押し出すことにより成形し，その後，フィルターの
両端のセル開口部を，閉塞栓により市松模様状に栓詰め
し，通気セル部分を形成する。次に，上記フィルターの
外周部を，フィルターの全断面積の１０〜２０％となる
ように閉塞栓により栓詰めし，閉塞して周辺セル断熱部
を形成する。更に，このフィルターを高温度で焼成し，
本発明にかかるフィルターを得る。上記閉塞栓として
は，例えばセラミック製のものを用いる。The filter is made of ceramic or the like. A filter is formed, for example, by mixing these materials in a viscous liquid and extruding the mixed liquid with a honeycomb-type extruder, and then plugging the cell openings at both ends of the filter in a checkerboard pattern with blocking plugs. Fill and form the ventilation cell part. Next, the outer peripheral portion of the filter is plugged with a blocking plug so as to be 10 to 20% of the total cross-sectional area of the filter and closed to form a peripheral cell heat insulating portion. Furthermore, this filter is fired at high temperature,
A filter according to the present invention is obtained. As the blocking plug, for example, a ceramic plug is used.
【００１３】[0013]
【作用及び効果】本発明の排気浄化装置においては，フ
ィルターの周辺部に両端を閉塞した周辺セル断熱部を設
けている。そのため，従来のごとく，フィルターの外周
部からトラップ容器への熱放散を防止することができ
る。また，上記栓詰率を１０〜２０％としている。その
ため，フィルター周辺部からの放熱が殆どなく，捕集さ
れたパティキュレートを効率よく燃焼除去でき，フィル
ター再生率に優れている。更に，エンジン排圧の圧損を
最小限に抑えることができ，エンジン性能の低下を招く
こともない。上記のごとく，本発明によれば，フィルタ
ー再生率に優れ，かつエンジン排圧の圧損を最小限に抑
えることができるディーゼルエンジンの排気浄化装置を
提供することができる。In the exhaust gas purifying apparatus of the present invention, the peripheral cell heat insulating portion whose both ends are closed is provided in the peripheral portion of the filter. Therefore, as in the conventional case, it is possible to prevent heat from being dissipated from the outer peripheral portion of the filter to the trap container. The plugging rate is set to 10 to 20%. Therefore, there is almost no heat radiation from the filter periphery, the collected particulates can be efficiently burned and removed, and the filter regeneration rate is excellent. Moreover, the pressure loss of the engine exhaust pressure can be minimized, and the engine performance will not be degraded. As described above, according to the present invention, it is possible to provide an exhaust emission control device for a diesel engine, which has an excellent filter regeneration rate and can minimize the pressure loss of engine exhaust pressure.
【００１４】[0014]
【実施例】 実施例１ 本発明の実施例にかかるディーゼルエンジンの排気浄化
装置につき，図１ないし図４を用いて説明する。本例の
排気浄化装置９に用いるフィルター８は，図１，図２に
示すごとく，ほぼ平行に設けた複数の細長いセル６を有
する。該セル６の両端である上流側８１及び下流側８９
は，閉塞栓１により互い違いに市松模様状に栓詰めされ
ている（図１，２左下り斜線部分）。また，フィルター
８の周辺部には，上記セルの上流側８１及び下流側８９
を共に閉塞栓１により栓詰めして閉塞した，周辺セル断
熱部６１を有する（図１，２網目状部分）。そして，フ
ィルターの直径方向の全断面積に対する周辺セル断熱部
の断面積の割合を示す栓詰率は，１０〜２０％である。
その他は，前記従来例と同様である。EXAMPLE 1 An exhaust emission control device for a diesel engine according to an example of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 and 2, the filter 8 used in the exhaust emission control device 9 of this example has a plurality of elongated cells 6 arranged substantially in parallel. The upstream side 81 and the downstream side 89 which are both ends of the cell 6.
Are alternately plugged in a checkered pattern by the obstruction plugs 1 (the hatched portions on the left and down in FIGS. 1 and 2). In addition, the upstream side 81 and the downstream side 89 of the cell are provided around the filter 8.
And a peripheral cell heat insulating portion 61, which is closed and closed by the closing plug 1 (see FIGS. 1 and 2). The plugging rate, which represents the ratio of the cross-sectional area of the peripheral cell heat insulating portion to the total cross-sectional area of the filter in the diameter direction, is 10 to 20%.
Others are the same as in the conventional example.
【００１５】次に，上記栓詰率に対して，フィルターに
パティキュレートを捕集した後，パティキュレートを燃
焼除去した際の重量再生率と栓詰率との関係，及びエン
ジン排圧の変化と栓詰率との関係につき，実験を行っ
た。図３は，上記周辺セル断熱部６１の栓詰率に対する
フィルターの重量再生率を示す線図である。該重量再生
率とは，（捕集量−再生後燃え残り量）×１００／捕集
量（％）のことである。この図より，周辺セル断熱部の
栓詰め率が１０％未満のときは，重量再生率は８０％未
満である。そして，栓詰率が２０％以上になると重量再
生率は８５％程度で，ほぼ飽和状態に達する。Next, with respect to the plugging rate, the relation between the weight regeneration rate and the plugging rate when the particulates are collected by the filter and then burned and removed, and the change of the engine exhaust pressure are shown. An experiment was conducted on the relationship with the plugging rate. FIG. 3 is a diagram showing the weight regeneration rate of the filter with respect to the plugging rate of the peripheral cell heat insulation section 61. The weight regeneration rate is (collected amount-burned amount after regeneration) x 100 / collected amount (%). From this figure, when the plugging rate of the peripheral cell heat insulation part is less than 10%, the weight regeneration rate is less than 80%. When the plugging rate is 20% or more, the weight regeneration rate is about 85%, which is almost saturated.
【００１６】次に，図４は，上記栓詰め率が２０％（直
線Ｙ）と４０％（直線Ｚ）の時の，エンジン排圧の変化
を経時的に示す線図である。この図より，２０分未満の
時はＹとＺとも排圧に顕著な差は見られない。そして，
ＹとＺも共に時間に比例して排圧が増加しているが，栓
詰率の大きいＺの排圧の増加率は，Ｙに比べてにかなり
高くなっている。上記より知られるごとく，栓詰率が１
０％未満では，図３に示すごとく，トラップ容器９１へ
の放熱が大きくなり，パティキュレートの燃え残りが生
じ，フィルター８の重量再生率が低下する。一方，２０
％を越えると，図４に示すごとく，エンジンの排圧がフ
ィルターの使用時間と共に大きく増加し，エンジン性能
の低下を招く。従って，栓詰率が１０〜２０％のとき
は，フィルター再生率に優れ，エンジン排圧の圧損が少
なく，エンジン性能の低下がない。Next, FIG. 4 is a diagram showing changes in engine exhaust pressure over time when the plugging rate is 20% (straight line Y) and 40% (straight line Z). From this figure, when the time is less than 20 minutes, there is no significant difference in the exhaust pressure between Y and Z. And
The exhaust pressures of both Y and Z increase in proportion to time, but the increase rate of the exhaust pressure of Z, which has a large plugging rate, is considerably higher than that of Y. As known from the above, the plugging rate is 1
If it is less than 0%, as shown in FIG. 3, the heat radiation to the trap container 91 becomes large, the unburned particulates occur, and the weight regeneration rate of the filter 8 decreases. On the other hand, 20
When it exceeds%, as shown in FIG. 4, the exhaust pressure of the engine greatly increases with the use time of the filter, which causes deterioration of engine performance. Therefore, when the plugging rate is 10 to 20%, the filter regeneration rate is excellent, the pressure loss of the engine exhaust pressure is small, and the engine performance is not deteriorated.
【００１７】なお，上記フィルター８の製造に当って
は，セラミック粉末材料を混合し，その混合液をハニカ
ム型の押し出し器により押し出すことにより成形し，そ
の後，フィルター８の両端のセル開口部を互い違いに市
松状に栓詰めし，通気セル部分６９を形成する。次に，
上記フィルター８の外周部を，フィルター８の全断面積
の１０〜２０％となるように，セラミック製の閉塞栓１
で栓詰め，閉塞して周辺セル断熱部６１を形成する。更
に，このフィルター８を高温で焼成し，本例にかかるフ
ィルター８を得る。本例のディーゼルエンジン排気浄化
装置においては，フィルター再生率に優れ，かつエンジ
ン排圧の圧損を最小限に抑えることができる。In the manufacture of the filter 8, the ceramic powder materials are mixed and the mixture is extruded by a honeycomb type extruder to form the mixture, and then the cell openings at both ends of the filter 8 are staggered. Then, it is plugged in a checkered pattern to form the ventilation cell portion 69. next,
The closure plug 1 made of ceramic so that the outer peripheral portion of the filter 8 becomes 10 to 20% of the total cross-sectional area of the filter 8.
Then, the peripheral cell heat insulating portion 61 is formed by plugging and closing. Further, the filter 8 is fired at a high temperature to obtain the filter 8 according to this example. In the diesel engine exhaust gas purification device of this example, the filter regeneration rate is excellent and the pressure loss of the engine exhaust pressure can be minimized.
【００１８】実施例２ 本例は，図５に示すごとく，実施例１のフィルターにお
いて，周辺セル断熱部６１のセル６６の幅を，通気セル
部分６９のセル６よりも大きく，２倍の幅としたもので
ある。その他は，実施例１と同様である。本例によれ
ば，周辺セル断熱部６１のセル６６のサイズを大きくす
ることにより，周辺セル断熱部６１の断熱効果を一層向
上させることができる。また，本例においても実施例１
と同様の効果が得られる。Example 2 In this example, as shown in FIG. 5, in the filter of Example 1, the width of the cell 66 of the peripheral cell heat insulating portion 61 is larger than that of the cell 6 of the aeration cell portion 69 and is twice as wide. It is what Others are the same as in the first embodiment. According to this example, by increasing the size of the cell 66 of the peripheral cell heat insulation part 61, the heat insulation effect of the peripheral cell heat insulation part 61 can be further improved. Also in this example, the first embodiment
The same effect as can be obtained.
【図１】実施例１における，排気浄化装置の断面図。FIG. 1 is a cross-sectional view of an exhaust emission control device according to a first embodiment.
【図２】実施例１における，フィルターの正面図。FIG. 2 is a front view of the filter according to the first embodiment.
【図３】実施例１におけるフィルターの栓詰め率とフィ
ルターの重量再生率との関係を示す線図。FIG. 3 is a graph showing the relationship between the filter plugging rate and the filter weight regeneration rate in Example 1.
【図４】実施例１における，フィルターの栓詰め率とエ
ンジン排圧との関係を示す線図。FIG. 4 is a diagram showing the relationship between the filter plugging rate and engine exhaust pressure in the first embodiment.
【図５】実施例２における，フィルターの断面図。FIG. 5 is a cross-sectional view of the filter according to the second embodiment.
【図６】従来例における，ディーゼルエンジンと排気浄
化装置の関係を示す説明図。FIG. 6 is an explanatory diagram showing a relationship between a diesel engine and an exhaust emission control device in a conventional example.
【図７】従来例における，フィルターの断面図。FIG. 7 is a sectional view of a filter in a conventional example.
【図８】従来例における，フィルターの一部切欠正面
図。FIG. 8 is a partially cutaway front view of a filter in a conventional example.
１．．．閉塞栓， １９．．．隔壁， ３．．．ディーゼルエンジン， ６，６６．．．セル， ６１．．．周辺セル断熱部， ６９．．．通気セル部分， ７．．．排気ガス， ８．．．フィルター， ９．．．排気浄化装置， ９１．．．トラップ容器， 1. ． ． Block plug, 19. ． ． Partition wall, 3. ． ． Diesel engine, 6,66. ． ． Cell, 61. ． ． Peripheral cell heat insulation part, 69. ． ． Ventilation cell part, 7. ． ． Exhaust gas, 8. ． ． Filter, 9. ． ． Exhaust purification device, 91. ． ． Trap container,
Claims (1)
ィキュレートを捕集するためのハニカム型のフィルター
と，上記排気ガスの排気通路に設けられ上記フィルター
を装着するトラップ容器とを有するディーゼルエンジン
の排気浄化装置において，上記フィルターは，ほぼ平行
に設けた複数のセルを有すると共に，フィルターの周辺
部には上記セルの上流側及び下流側を共に閉塞栓により
栓詰めした周辺セル断熱部を有してなり，上記フィルタ
ーの直径方向の全断面積に対する周辺セル断熱部の断面
積の割合を示す栓詰率は，１０〜２０％であることを特
徴とするディーゼルエンジンの排気浄化装置。1. Exhaust gas purification of a diesel engine, comprising a honeycomb type filter for collecting particulates in exhaust gas of a diesel engine, and a trap container provided in the exhaust passage of the exhaust gas and fitted with the filter. In the device, the filter has a plurality of cells arranged substantially parallel to each other, and a peripheral cell heat insulating part in which the upstream side and the downstream side of the cell are both plugged with blocking plugs in the peripheral part of the filter. An exhaust gas purification device for a diesel engine, wherein a plugging rate showing a ratio of a sectional area of a peripheral cell heat insulating portion to a total diametrical sectional area of the filter is 10 to 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3305483A JPH05118211A (en) | 1991-10-24 | 1991-10-24 | Exhaust emission control device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3305483A JPH05118211A (en) | 1991-10-24 | 1991-10-24 | Exhaust emission control device for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05118211A true JPH05118211A (en) | 1993-05-14 |
Family
ID=17945705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3305483A Pending JPH05118211A (en) | 1991-10-24 | 1991-10-24 | Exhaust emission control device for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05118211A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2845727A1 (en) * | 2002-10-15 | 2004-04-16 | Denso Corp | EXHAUST GAS CLEANING FILTER COMPRISING A REINFORCED PERIPHERAL AREA AND METHOD FOR THE PRODUCTION THEREOF |
| US6827754B2 (en) | 2001-09-13 | 2004-12-07 | Hitachi Metals, Ltd. | Ceramic honeycomb filter |
| JP2005270755A (en) * | 2004-03-24 | 2005-10-06 | Ngk Insulators Ltd | Honeycomb structure and its production method |
| WO2007033908A2 (en) * | 2005-09-21 | 2007-03-29 | Robert Bosch Gmbh | Honeycomb filter element and corresponding soot filter with improved thermal shock resistance |
| JP2009508683A (en) * | 2005-09-20 | 2009-03-05 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Filter elements and particulate filters with multiple geometrically similar passages |
| EP2364765A1 (en) | 2010-03-11 | 2011-09-14 | NGK Insulators, Ltd. | Honeycomb catalyst body |
-
1991
- 1991-10-24 JP JP3305483A patent/JPH05118211A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6827754B2 (en) | 2001-09-13 | 2004-12-07 | Hitachi Metals, Ltd. | Ceramic honeycomb filter |
| EP1733779A3 (en) * | 2001-09-13 | 2009-01-21 | Hitachi Metals, Ltd. | Ceramic honeycomb filter and method for producing the same |
| FR2845727A1 (en) * | 2002-10-15 | 2004-04-16 | Denso Corp | EXHAUST GAS CLEANING FILTER COMPRISING A REINFORCED PERIPHERAL AREA AND METHOD FOR THE PRODUCTION THEREOF |
| US7101601B2 (en) | 2002-10-15 | 2006-09-05 | Denso Corporation | Exhaust gas purifying filter with reinforced peripheral area and method for manufacturing the same |
| US7429285B2 (en) | 2004-03-24 | 2008-09-30 | Ngk Insulators, Ltd. | Honeycomb structure and method of manufacturing the same |
| JP2005270755A (en) * | 2004-03-24 | 2005-10-06 | Ngk Insulators Ltd | Honeycomb structure and its production method |
| JP2009508683A (en) * | 2005-09-20 | 2009-03-05 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Filter elements and particulate filters with multiple geometrically similar passages |
| JP4909352B2 (en) * | 2005-09-20 | 2012-04-04 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Filter elements and particulate filters with multiple geometrically similar passages |
| US8257460B2 (en) | 2005-09-20 | 2012-09-04 | Robert Bosch Gmbh | Filter element and soot filter having geometrically similar channels |
| WO2007033908A3 (en) * | 2005-09-21 | 2008-06-26 | Bosch Gmbh Robert | Honeycomb filter element and corresponding soot filter with improved thermal shock resistance |
| WO2007033908A2 (en) * | 2005-09-21 | 2007-03-29 | Robert Bosch Gmbh | Honeycomb filter element and corresponding soot filter with improved thermal shock resistance |
| JP2009508682A (en) * | 2005-09-21 | 2009-03-05 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Filter element and soot filter with improved thermal shock resistance |
| US8506663B2 (en) | 2005-09-21 | 2013-08-13 | Robert Bosch Gmbh | Filter element and soot filter having improved thermal shock resistance |
| EP2364765A1 (en) | 2010-03-11 | 2011-09-14 | NGK Insulators, Ltd. | Honeycomb catalyst body |
| US8603942B2 (en) | 2010-03-11 | 2013-12-10 | Ngk Insulators, Ltd. | Honeycomb catalyst body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3925154B2 (en) | Exhaust gas purification filter | |
| EP1450015B1 (en) | Honeycomb filter and exhaust gas purification system | |
| US4519820A (en) | Fitter apparatus for purifying exhaust gases | |
| EP0205755B1 (en) | Exhaust gas filter for diesel engine | |
| US6800107B2 (en) | Exhaust gas purifying filter | |
| US7524360B2 (en) | Method and apparatus for filtering exhaust particulates | |
| JP3303495B2 (en) | Exhaust gas purification device for internal combustion engine | |
| CA2070917A1 (en) | Heated cellular structures | |
| JPH02196120A (en) | Exhaust particulate processing equipment for internal combustion engine | |
| JP2008540933A (en) | Occlusion-free filter device with high efficiency | |
| CN106499478B (en) | Exhaust gas treatment device, method for raising temperature of catalyst, method for regenerating honeycomb structure, and method for removing ash | |
| JPH05118211A (en) | Exhaust emission control device for diesel engine | |
| JP4412641B2 (en) | Exhaust gas purification device and exhaust gas purification method | |
| JP2590943Y2 (en) | Exhaust gas purification device | |
| JP2003126629A (en) | Ceramic honeycomb filter | |
| JP2004108331A (en) | Particulate filter | |
| JP2004239199A (en) | Particulate filter | |
| US7716921B2 (en) | Exhaust particulate filter | |
| JP2004084502A (en) | Exhaust emission control filter | |
| JP2544659B2 (en) | Particulate trap device | |
| JPH05168834A (en) | Device for purifying fine particle in exhaust gas | |
| JP2924288B2 (en) | Filter regeneration device for internal combustion engine | |
| JPS61205315A (en) | Exhaust gas filter | |
| JPS61136412A (en) | Exhaust gas filter | |
| JPS637817A (en) | Exhaust gas filter |