JPH01237311A - Diesel exhaust gas purifying device - Google Patents

Diesel exhaust gas purifying device

Info

Publication number
JPH01237311A
JPH01237311A JP63060995A JP6099588A JPH01237311A JP H01237311 A JPH01237311 A JP H01237311A JP 63060995 A JP63060995 A JP 63060995A JP 6099588 A JP6099588 A JP 6099588A JP H01237311 A JPH01237311 A JP H01237311A
Authority
JP
Japan
Prior art keywords
filter
exhaust gas
combustion
combustion heater
container
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
Application number
JP63060995A
Other languages
Japanese (ja)
Inventor
Takao Kusuda
楠田 隆男
Masaaki Yonemura
米村 正明
Hisanori Shimoda
下田 久則
Masuo Takigawa
瀧川 益生
Hiroki Kusakabe
弘樹 日下部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP63060995A priority Critical patent/JPH01237311A/en
Publication of JPH01237311A publication Critical patent/JPH01237311A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

  • Processes For Solid Components From Exhaust (AREA)

Abstract

PURPOSE:To relax thermal load speed applied to a filter in reproducing the same in a device having a ceramic filter housed in a container and a combustion heater disposed on the inlet side of the filter by providing an accumulator in the container between the filter and the combustion heater. CONSTITUTION:A ceramic honeycomb having rectangular cells 2a and 2b serving as many flow passages therein is used as a main body, and one end of the cells 2a and 2b are alternately blocked with plugs 3, thereby constituting a cylindrical ceramic filter 1. The filter 1 is housed in a container 4 made of heat resistant stainless steel via a wadding 3, and a combustion chamber 9 forwardly provided with a combustion heater 10 is connected forwardly from the filter 1 (on an exhaust gas flowing-in side), thereby constituting an exhaust gas purifying device. An accumulator 5 having a honeycomb construction made of heat resistant stainless steel is disposed in the container 4 between the filter 1 and the combustion chamber 9 so that, in reproducing the filter, heat in the combustion heater 10 can be temporarily absorbed so as to be cushioned.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はディーゼル機関の排ガスを浄化する、とりわけ
排ガス中に含まれるパティキュレート(スス)を除去す
る装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for purifying the exhaust gas of a diesel engine, particularly for removing particulates (soot) contained in the exhaust gas.

従来の技術 近年ディーゼル機関の排ガス中に含まれるパティキュレ
ートの環境に与える影響が懸念され、規制され始めてい
る。これに対応して、ディーゼル機関の排ガスを浄化す
るには、排気管の途中に耐熱性のセラミックハニカムを
改造したフィルタを取り付けてパーティキュレートを濾
過しようと試みられている。この方法の特徴は、パティ
キュレートが堆積したとき、これに火を付けて燃焼させ
、セラミックフィルタを再生、繰り返し使用することで
ある。このパティキュレートの焼却作業をリジェネレー
ションと呼んでいる。一般にディーゼル機関の排ガス温
度は低いので、パティキュレートはそのままでは燃えな
い。よってリジェネレーションは、何らかの手段によっ
てパティキュレートを着火温度まで高めてやらなければ
ならない。このリジェネレーションの一つとして、フィ
ルタの排ガス上流側に燃焼器を設け、その熱でもってパ
ティキュレートに着火する方式がある。
BACKGROUND OF THE INVENTION In recent years, there has been concern about the environmental impact of particulates contained in exhaust gas from diesel engines, and regulations have begun to be put in place. In response to this, attempts have been made to purify the exhaust gas from diesel engines by installing a filter made of a modified heat-resistant ceramic honeycomb in the middle of the exhaust pipe to filter particulates. A feature of this method is that when particulates accumulate, they are ignited and burned to regenerate and repeatedly use the ceramic filter. This particulate incineration process is called regeneration. Generally, the exhaust gas temperature of diesel engines is low, so particulates do not burn as they are. Therefore, in regeneration, particulates must be raised to the ignition temperature by some means. One type of regeneration is a method in which a combustor is provided upstream of the exhaust gas from the filter, and particulates are ignited with the heat of the combustor.

特開昭61−16221公報は、この方式に関して最初
は燃焼器の熱量を少なく、その抜栓々に増加するように
した排ガス浄化装置である。
JP-A-61-16221 discloses an exhaust gas purification device of this type in which the amount of heat in the combustor is initially small and increases each time the combustor is opened.

発明が解決しようとする課題 セラミックフィルタが燃焼加熱器が発生する高温燃焼ガ
ス流内に置かれて加熱された場合には、セラミックの中
心部分と外周部分とで、また前部と後部との間で大きな
温度差が生じる。このとき生じる熱応力によりセラミッ
クの外周部分に大きな引っ張り力が発生する。そしてこ
の引っ張り力にセラミックは耐えきれず、外周部に中心
軸と直角にリング状のクラックが入る。これを防ぐため
に特開昭61−16221号公報のような構成では燃焼
加熱器を制御して、フィルタに供給される熱量を最初は
小さ(抑える方法を用いている。これによると、フィル
タは徐々に加熱されるので上記のような問題は、和らげ
られる。しかし、この装置は複雑な制御装置を必要とし
、燃焼状態も初期の立ち上がり時は低燃焼量のため悪(
、C○やHCを大気に放出することにもなる。またリジ
ェネレーションを終えて燃焼器が止められた時は、エン
ジンからの低温排ガスによってフィルタが急激に冷却さ
れ、フィルタには上記とは逆の温度差がついてクラック
が発生していた。
Problem to be Solved by the Invention When a ceramic filter is heated by being placed in a high-temperature combustion gas flow generated by a combustion heater, there is A large temperature difference occurs. The thermal stress generated at this time generates a large tensile force in the outer peripheral portion of the ceramic. The ceramic cannot withstand this tensile force, and a ring-shaped crack appears on the outer periphery at right angles to the central axis. In order to prevent this, the configuration disclosed in JP-A-61-16221 uses a method in which the combustion heater is controlled to initially reduce the amount of heat supplied to the filter.According to this, the filter gradually However, this device requires a complicated control device, and the combustion condition is poor at the initial start-up due to the low combustion amount (
, C○ and HC are also released into the atmosphere. Furthermore, when the combustor was shut down after regeneration, the filter was rapidly cooled down by the low-temperature exhaust gas from the engine, creating a temperature difference in the filter that was opposite to that described above and causing cracks to form in the filter.

そこで本発明は、セラミックフィルタが急激に加熱され
たり、冷却されても、外周部にリング状のクラックが生
じないようにして、セラミックフィルタの構造体として
の原形を維持して有効なディーゼルエンジンの排ガス浄
化機能を果たせるようにするものである。
Therefore, the present invention aims to prevent ring-shaped cracks from occurring on the outer periphery even when the ceramic filter is rapidly heated or cooled, thereby maintaining the original shape of the ceramic filter structure and making it effective for use in diesel engines. This enables it to perform the exhaust gas purification function.

課題を解決するための手段 セラミックフィルタを収納する金属製容器の内部であっ
て、フィルタの排ガス上流側に蓄熱器を設置する。
Means for Solving the Problems A heat storage device is installed inside a metal container housing a ceramic filter on the exhaust gas upstream side of the filter.

作用 リジェネレーション時、燃焼加熱器からの高温燃焼ガス
の熱は一旦、セラミツフィルタの排ガス上流側に置かれ
た蓄熱器で吸収されるので、フィルタが時間的な遅れを
持って徐々に加熱される。
During regeneration, the heat of the high-temperature combustion gas from the combustion heater is first absorbed by the heat storage device placed upstream of the exhaust gas of the ceramic filter, so the filter is gradually heated with a time delay. Ru.

次にリジェネレーションが終わってエンジンからの比較
的低温の排ガスが流れ込むと、高温に保持されていた蓄
熱器が保有していた熱を排ガスに与える。このことによ
ってフィルタは、徐々に冷却される。これらの徐加熱・
徐冷却を通じてセラミックフィルタ内部の温度分布は比
較的穏やかになり、熱応力でクラックの生じるようなこ
とはない。
Next, when regeneration is finished and relatively low-temperature exhaust gas from the engine flows in, the heat stored in the heat storage device, which was kept at a high temperature, is transferred to the exhaust gas. This gradually cools the filter. These slow heating and
Through gradual cooling, the temperature distribution inside the ceramic filter becomes relatively gentle, and no cracks occur due to thermal stress.

実施例 以下、本発明のディーゼル排ガス浄化装置の一実施例を
添付図面にもとづいて説明する。
Embodiment Hereinafter, one embodiment of the diesel exhaust gas purification device of the present invention will be described based on the accompanying drawings.

図はディーゼル排ガス浄化装置の縦断面を示したもので
、図中1は円筒状セラミックフィルタである。セラミッ
クフィルタ1は、内部に多数の流路となる矩形のセル2
a、2bを有するセラミックハニカムを母体とし、その
セル2a、2bの一端を交互にプラグ3で閉塞して構成
しである。セラミックフィルタ1の外周には熱膨張性の
蛭石とセラミックファイバと有機バインダとを混合して
シート状にした緩衝材3を巻いた後、耐熱ステラレス製
の容器4に収納している。容器4内にはセラミックフィ
ルタ1の前方やや離れて耐熱ステンレス製のハニカム構
造の蓄熱器5が設置されている。また容器4の内側一端
には緩衝材3がセラミックフィルタと共に後方にズレな
いようにストッパ6が溶接されている。缶ケース4の前
後には耐熱ステンレス製でコーン状にテーパを持ったガ
ス導入口を取り付け、一方を処理ガス接続ロア、他方を
マフラー接続口8としている。処理ガス接続ロアの前方
には燃焼室9と接続してあり、その燃焼室9には処理ガ
ス接続ロアと対置して燃焼加熱器10を具備してる。燃
焼加熱器10は、空気霧化ノズル11を中心に置き、そ
の周辺から燃焼空気口12を経て空気が霧化ノズル11
の先端方向に流れる構造となっている。また霧化ノズル
11の前方には霧化された燃料に高圧放電アークで着火
させるための点火プラグ13を取り付けている。燃焼室
9の処理ガス接続ロアと燃焼器10との間には、エンジ
ン排ガス導入管14が接続されている。排ガス導入管1
4は、エンジン排気−〇 − 管15を排ガスバイパス管16とに分岐した一方である
。排ガスバイパス管16とマフラー接続口8は途中で合
流して排気マフラー(図示せず)に接続しである。排ガ
ス導入管14と排ガスバイパス管16の分岐点には、そ
れが矢印方向に回転することによりエンジンからの排ガ
スを排ガス導入管14や排ガスバイパス管16に切り替
える三方弁17を設けである。
The figure shows a longitudinal section of a diesel exhaust gas purification device, and numeral 1 in the figure is a cylindrical ceramic filter. Ceramic filter 1 has rectangular cells 2 with many flow paths inside.
A ceramic honeycomb having cells 2a and 2b is used as a base body, and one ends of the cells 2a and 2b are alternately closed with plugs 3. The outer periphery of the ceramic filter 1 is wrapped with a cushioning material 3 made of a sheet of a mixture of thermally expandable vermiculite, ceramic fibers, and an organic binder, and then stored in a container 4 made of heat-resistant Stellaless. Inside the container 4, a heat accumulator 5 having a honeycomb structure made of heat-resistant stainless steel is installed at a distance slightly in front of the ceramic filter 1. A stopper 6 is welded to one end of the inside of the container 4 to prevent the cushioning material 3 from shifting backward together with the ceramic filter. Gas inlet ports made of heat-resistant stainless steel and tapered into a cone shape are attached to the front and rear of the can case 4, with one end serving as a processing gas connection lower and the other end serving as a muffler connection port 8. The front of the processing gas connection lower is connected to a combustion chamber 9, and the combustion chamber 9 is equipped with a combustion heater 10 opposite to the processing gas connection lower. The combustion heater 10 has an air atomizing nozzle 11 in the center, and air flows from its periphery through a combustion air port 12 to the atomizing nozzle 11.
The structure is such that it flows toward the tip. Further, a spark plug 13 is installed in front of the atomization nozzle 11 for igniting the atomized fuel with a high-pressure discharge arc. An engine exhaust gas introduction pipe 14 is connected between the processing gas connection lower of the combustion chamber 9 and the combustor 10. Exhaust gas introduction pipe 1
4 is one side where the engine exhaust pipe 15 is branched into an exhaust gas bypass pipe 16. The exhaust gas bypass pipe 16 and the muffler connection port 8 join in the middle and are connected to an exhaust muffler (not shown). A three-way valve 17 is provided at the branch point of the exhaust gas introduction pipe 14 and the exhaust gas bypass pipe 16 to switch the exhaust gas from the engine to the exhaust gas introduction pipe 14 or the exhaust gas bypass pipe 16 by rotating it in the direction of the arrow.

次に、この実施例の構成における動作を説明する。まず
ディーゼルエンジンの通常運転時には三方弁17は図の
位置にあり、エンジンからの排ガスは排ガス導入管14
及び燃焼室9を経てセラミックフィルタ1の前面に到達
する。ここから排ガスはセラミックフィルタ1の燃焼室
9側に開口しているセル2aに入り、そこでセル壁を透
過してマフラー接続口S側に開口しているセル2bに入
る。このとき排ガスに含まれていたパティキュレートは
、セル壁を透過できずに燃焼室9側に開口しているセル
2a内にととまって堆積する。−方パティキュレートを
取り除かれクリーンになった排ガスは、マフラー接続口
8に入り、排気マフラーを経て大気に放出される。この
パティキュレートを堆積する作業は1時間から2時間か
けて、継続して行われる。そしてセラミックフィルタ1
内に十分にパティキュレートが溜まり、これ以上この作
業を継続すると上昇した背圧によってエンジンが悪影響
を受けるようになると、リジェネレーション作業に入る
Next, the operation of the configuration of this embodiment will be explained. First, during normal operation of a diesel engine, the three-way valve 17 is in the position shown in the figure, and the exhaust gas from the engine flows through the exhaust gas inlet pipe 14.
It then passes through the combustion chamber 9 and reaches the front surface of the ceramic filter 1 . From here, the exhaust gas enters the cell 2a of the ceramic filter 1 which is open to the combustion chamber 9 side, passes through the cell wall, and enters the cell 2b which is open to the muffler connection port S side. At this time, the particulates contained in the exhaust gas cannot pass through the cell walls, and stay and accumulate in the cells 2a that are open to the combustion chamber 9 side. The exhaust gas, which has been made clean by removing particulates, enters the muffler connection port 8 and is discharged to the atmosphere through the exhaust muffler. This work of depositing particulates is continuously carried out over a period of 1 to 2 hours. and ceramic filter 1
When sufficient particulates accumulate inside the engine and the engine will be adversely affected by the increased back pressure if this operation continues any longer, regeneration work will begin.

リジェネレーションは、まず三方弁17を図の上から見
て時計方向に約40度回転させ、排ガス導入管14に流
れていた排ガスを遮って、排ガスバイパス管16の方に
流れを切り替える。そして排ガスバイパス管16に流れ
込んだ排ガスは、排気マフラーを経て大気に放出される
。この三方弁17の切り替えと同時に、燃焼加熱器10
を作動させる。燃焼加熱器10の作動は、まず軽油と霧
化用空気を霧化ノズル11に送り込み、霧化した軽油を
先端から吐出する。また燃焼用空気口12から燃焼用空
気を送り込む。それと同時に点火プラグ13に約1万■
の高電圧を印加すると、先端て発生するスパークによっ
て霧化された軽油が着火して燃焼が始まる。
In the regeneration, first, the three-way valve 17 is rotated approximately 40 degrees clockwise when viewed from the top of the diagram to interrupt the exhaust gas flowing into the exhaust gas introduction pipe 14 and switch the flow to the exhaust gas bypass pipe 16. The exhaust gas that has flowed into the exhaust gas bypass pipe 16 is then discharged to the atmosphere through the exhaust muffler. At the same time as this switching of the three-way valve 17, the combustion heater 10
Activate. The combustion heater 10 operates by first feeding light oil and atomizing air into the atomizing nozzle 11, and then discharging the atomized light oil from the tip. Further, combustion air is sent in from the combustion air port 12. At the same time, about 10,000■
When a high voltage is applied, the spark generated from the tip ignites the atomized light oil and combustion begins.

燃焼加熱器10によって発生させられた高温燃焼ガスは
、燃焼室9で均一な温度分布にされ、セラミックフィル
タ1の前方に位置した/’tニカム状蓄熱器5に接触し
てこれを加熱する。この時、高温燃焼ガスが保有する熱
量は、蓄熱器5に奪われて、−旦低温のガスに変質され
る。これは蓄熱器5の温度が燃焼ガスの温度に近付いて
飽和するまでの間継続される。一方、蓄熱器5を通過し
た燃焼ガスは徐々に元の高温ガスに戻って行く。この燃
焼ガスはセラミックフィルタ1の内部に流入して加熱す
る。この間、燃焼加熱器11の出力は2000のkca
l/h〜4000kcal/hの間で間で変化させ、燃
焼室9内では常に約700℃付近に燃焼ガス温度が一定
になるように制御している。この状態で維持すると約5
分後には、セラミックフィルタ1の内部温度は600℃
以上になり、内部に堆積したパティキュレートは燃焼を
始める。そしてセラミックフィルタlの内部温度は入口
温度の700℃より高(なり、約800℃から1000
℃にまで達する。この状態で5分間維持すると、セラミ
ックフィルタ1内に堆積したパティキュレートは総て焼
き尽くされ、内部はクリーンな元の状態に戻る。そして
燃焼加熱器10の運転を停止する。
The high-temperature combustion gas generated by the combustion heater 10 has a uniform temperature distribution in the combustion chamber 9, contacts the nicum-shaped heat storage device 5 located in front of the ceramic filter 1, and heats it. At this time, the amount of heat held by the high-temperature combustion gas is taken away by the heat storage device 5 and transformed into low-temperature gas. This continues until the temperature of the heat storage device 5 approaches the temperature of the combustion gas and becomes saturated. On the other hand, the combustion gas that has passed through the heat storage device 5 gradually returns to the original high temperature gas. This combustion gas flows into the ceramic filter 1 and heats it. During this period, the output of the combustion heater 11 is 2000 kca.
The combustion gas temperature is controlled to vary between 1/h and 4000 kcal/h, and the combustion gas temperature in the combustion chamber 9 is always kept constant around 700°C. If maintained in this state, approximately 5
After minutes, the internal temperature of ceramic filter 1 is 600℃.
When this happens, the particulates that have accumulated inside begin to burn. The internal temperature of the ceramic filter l is higher than the inlet temperature of 700°C (approximately 800°C to 1000°C).
It reaches up to ℃. If this state is maintained for 5 minutes, all the particulates deposited within the ceramic filter 1 will be burned away, and the interior will return to its original clean state. Then, the operation of the combustion heater 10 is stopped.

その後、三方弁17を反時計回りに逆転させ、排ガスバ
イパス管16に流れていた排ガスの流れを切り替えて、
排ガス導入路14に流れ込ませ、通常の運転状態に戻す
。このときエンジン排ガスは約200℃から400℃で
推移しており、燃焼室9を経由して流れてきた排ガスに
は、容器4内で蓄熱器5を通過するとき、高温に加熱さ
れていた蓄熱器5の保有する熱が与えられる。そのため
排ガスは高温から徐々に温度が下げながらセラミックフ
ィルタ1内を流れ続ける。そして約2分経過してセラミ
ックフィルタ1は、排ガス温度まで冷却される。
After that, the three-way valve 17 is reversed counterclockwise to switch the flow of exhaust gas flowing into the exhaust gas bypass pipe 16,
The exhaust gas is allowed to flow into the exhaust gas introduction path 14, and the normal operating state is restored. At this time, the engine exhaust gas is changing at a temperature of approximately 200°C to 400°C, and the exhaust gas that has flowed through the combustion chamber 9 has heat storage that has been heated to a high temperature when passing through the heat storage device 5 in the container 4. The heat held by the vessel 5 is given. Therefore, the exhaust gas continues to flow through the ceramic filter 1 while the temperature gradually decreases from a high temperature. After approximately 2 minutes have elapsed, the ceramic filter 1 is cooled down to the exhaust gas temperature.

このようにリジェネレーションでセラミックフィルタ1
内に堆積したパティキュレートを焼却するとき、加熱手
段である燃焼加熱器10の熱を一時的に吸収して緩衝と
し、セラミックフィルタ1の内部で長手方向と半径外周
方向に温度差を付けさせない。また燃焼加熱器を停止さ
せた後、エンジンからの排ガスに一旦吸収した熱を与え
て、排ガス温度を徐々に下げて、セラミックフィルタ1
の内部で長手方向に温度差を付けさせない。
Ceramic filter 1 with regeneration like this
When incinerating the particulates deposited inside, the heat of a combustion heater 10 serving as a heating means is temporarily absorbed and used as a buffer to prevent a temperature difference between the longitudinal direction and the radial outer circumferential direction inside the ceramic filter 1. After the combustion heater is stopped, the heat that was once absorbed is given to the exhaust gas from the engine to gradually lower the exhaust gas temperature, and the ceramic filter 1
Do not allow temperature differences in the longitudinal direction inside the

発明の効果 本発明はセラミックフィルタの排ガス流入側前方に金属
製ハニカム等の蓄熱器を設置し、リジェネレーション時
にセラミックフィルタにかかる熱負荷速度を緩和し、セ
ラミックフィルタの中心部と外周部との温度差及び前部
と後部の温度差を小さくするものである。このことによ
ってセラミックフィルタの内部に発生する熱応力を小さ
(抑えることができ、セラミックフィルタの外周部にク
ラックを発生することが無(なった。よってディーゼル
排ガス浄化装置は、はぼエンジンの耐用年数に見合う耐
久性を確保することができた。
Effects of the Invention The present invention installs a heat storage device such as a metal honeycomb in front of the exhaust gas inflow side of a ceramic filter, reduces the rate of heat load applied to the ceramic filter during regeneration, and reduces the temperature between the center and outer periphery of the ceramic filter. This reduces the difference in temperature between the front and rear parts. As a result, the thermal stress generated inside the ceramic filter can be suppressed to a small level, and cracks do not occur on the outer periphery of the ceramic filter.Therefore, the diesel exhaust gas purification system We were able to ensure durability commensurate with that.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の一実施例のディーゼル排ガス浄化装置の縦
断面図である。 1・・・・セラミックフィルタ、3・・・・緩衝材、4
・・・・容器、5・・・・蓄熱器、9・・・・燃焼室、
10・・・・燃焼加熱器、11・・・・霧化ノズル、1
4・・・・排ガス導入管、16・・・・排ガスバイパス
管、17・・・・三方バルブ
The figure is a longitudinal sectional view of a diesel exhaust gas purification device according to an embodiment of the present invention. 1...Ceramic filter, 3...Buffer material, 4
... Container, 5 ... Heat storage device, 9 ... Combustion chamber,
10... Combustion heater, 11... Atomization nozzle, 1
4...Exhaust gas introduction pipe, 16...Exhaust gas bypass pipe, 17...Three-way valve

Claims (2)

【特許請求の範囲】[Claims] (1)セラミックハニカム構造体のセルの端部を交互に
閉塞してなるフィルタと、該フィルタの外周を緩衝材で
保護して収納する容器と、該フィルタの排ガス流入側に
位置した燃焼加熱器からなる排ガス浄化装置において、
該容器内でフィルタと燃焼加熱器との間に蓄熱器を装備
したことを特徴とするディーゼル排ガス浄化装置。
(1) A filter formed by alternately closing the ends of the cells of a ceramic honeycomb structure, a container in which the filter is stored with its outer periphery protected by a cushioning material, and a combustion heater located on the exhaust gas inflow side of the filter In an exhaust gas purification device consisting of
A diesel exhaust gas purification device characterized in that a heat storage device is installed between a filter and a combustion heater within the container.
(2)セラミックハニカム構造体をフィルタと燃焼加熱
器との間に置いて蓄熱器とした特許請求の範囲第1項記
載のディーゼル排ガス浄化装置。(3)金属の格子をフ
ィルタと燃焼加熱器との間に置いて蓄熱器とした特許請
求の範囲第1項記載のディーゼル排ガス浄化装置。
(2) The diesel exhaust gas purification device according to claim 1, wherein the ceramic honeycomb structure is placed between the filter and the combustion heater to serve as a heat storage device. (3) The diesel exhaust gas purification device according to claim 1, wherein a metal grid is placed between the filter and the combustion heater to serve as a heat storage.
JP63060995A 1988-03-15 1988-03-15 Diesel exhaust gas purifying device Pending JPH01237311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63060995A JPH01237311A (en) 1988-03-15 1988-03-15 Diesel exhaust gas purifying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63060995A JPH01237311A (en) 1988-03-15 1988-03-15 Diesel exhaust gas purifying device

Publications (1)

Publication Number Publication Date
JPH01237311A true JPH01237311A (en) 1989-09-21

Family

ID=13158522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63060995A Pending JPH01237311A (en) 1988-03-15 1988-03-15 Diesel exhaust gas purifying device

Country Status (1)

Country Link
JP (1) JPH01237311A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108024A1 (en) * 2010-03-02 2011-09-09 トヨタ自動車株式会社 Exhaust emission control device for internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108024A1 (en) * 2010-03-02 2011-09-09 トヨタ自動車株式会社 Exhaust emission control device for internal combustion engine
JPWO2011108024A1 (en) * 2010-03-02 2013-06-20 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
CN103502592A (en) * 2010-03-02 2014-01-08 丰田自动车株式会社 Exhaust purifying apparatus for internal combustion engine

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