JPH06117218A - Filter regenerative device for internal combustion engine - Google Patents
Filter regenerative device for internal combustion engineInfo
- Publication number
- JPH06117218A JPH06117218A JP4263324A JP26332492A JPH06117218A JP H06117218 A JPH06117218 A JP H06117218A JP 4263324 A JP4263324 A JP 4263324A JP 26332492 A JP26332492 A JP 26332492A JP H06117218 A JPH06117218 A JP H06117218A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- exhaust gas
- particulates
- internal combustion
- gas
- 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
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0233—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 using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
-
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
- F01N3/028—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means using microwaves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- 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
- 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)
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から
排出される排気ガス中に含まれるパティキュレート（粒
子状物質）を捕集する内燃機関用フィルタをマイクロ波
エネルギを利用して再生する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for regenerating an internal combustion engine filter for collecting particulates (particulate matter) contained in exhaust gas discharged from a diesel engine by utilizing microwave energy. Is.
【０００２】[0002]
【従来の技術】地球環境保全に関して、今日では地球温
暖化対策すなわちＣＯ2 低減対策が大きくクローズアッ
プされているが、森林破壊を招く酸性雨の対策も無視で
きない。2. Description of the Related Art With respect to global environmental protection, measures against global warming, that is, CO2 reduction measures have been greatly emphasized today, but measures against acid rain causing deforestation cannot be ignored.
【０００３】酸性雨は硫黄酸化物や窒素酸化物などの大
気汚染物質が汚染源となって生じる自然現象であり、近
年世界各国でこのような大気汚染物質の排出規制がコ・
ジェネレーションなどの固定発生源や自動車などの移動
発生源に対して強化される動きにある。特に、自動車の
排気ガスに関する規制は従来の濃度規制から総量規制へ
移行され規制値自体も大幅な削減がなされようとしてい
る。Acid rain is a natural phenomenon in which air pollutants such as sulfur oxides and nitrogen oxides are sources of pollution. In recent years, emission regulations of such air pollutants have become common in countries around the world.
There are moves to strengthen fixed sources such as generation and mobile sources such as automobiles. In particular, regulations on exhaust gas from automobiles are shifting from the conventional concentration regulations to total amount regulations, and the regulation values themselves are about to be significantly reduced.
【０００４】自動車の中でもディーゼル車は窒素酸化物
と同時にパティキュレートの排出規制の強化が行われ
る。燃料噴射時期遅延などの燃焼改善による従来の排気
ガス中の汚染物質低減対策だけでは排出ガス規制値を達
成することは不可能とされ、現状では排気ガスの後処理
装置の付設が不可欠である。この後処理装置はパティキ
ュレートを捕集するフィルタを有するものである。Among automobiles, diesel vehicles are subject to stricter emission control of particulates as well as nitrogen oxides. It is not possible to achieve the exhaust gas regulation value only by conventional measures for reducing pollutants in exhaust gas by improving combustion such as delay of fuel injection timing, and at present it is indispensable to attach an exhaust gas aftertreatment device. This post-treatment device has a filter for collecting particulates.
【０００５】ところが、パティキュレートが捕集され続
けるとフィルタは目詰まりを生じて捕集能力が大幅に低
下するとともに排気ガスの流れが悪くなってエンジン出
力の低下あるいはエンジンの停止といったことに至る。
したがって、現在世界中でフィルタの捕集能力を再生さ
せるための技術開発が進められている。However, if the particulates continue to be collected, the filter will be clogged, the collecting ability will be greatly reduced, and the exhaust gas flow will be deteriorated, leading to a reduction in engine output or engine stop.
Therefore, technical development for regenerating the trapping ability of the filter is currently underway all over the world.
【０００６】パティキュレートは６００℃程度から燃焼
することが知られている。パティキュレートをこの高温
度域に昇温するためのエネルギを発生する手段として、
バーナ加熱、電気ヒータ加熱あるいはマイクロ波加熱な
どが考えられている。It is known that particulates burn from about 600 ° C. As a means for generating energy to raise the particulates to this high temperature range,
Burner heating, electric heater heating, microwave heating, etc. have been considered.
【０００７】本発明者らは昇温効率の良さ、安全性、装
置構成の容易さあるいは再生制御性の良さなどを考慮し
てマイクロ波を利用したフィルタ再生装置を開発してき
た。The present inventors have developed a filter regenerator utilizing microwaves in consideration of good efficiency of temperature rise, safety, easiness of device configuration, good reproducibility control and the like.
【０００８】マイクロ波方式によるフィルタ再生装置と
しては、たとえば特開昭５９−１２６０２２号公報があ
る。同公報に開示されている装置を図７に示す。図７に
おいて、１はエンジン、２は排気マニホールド、３は排
気管、４は排気分岐管、５はフィルタ、６はフィルタ５
を収納した加熱室、７はマイクロ波発生手段、８はマイ
クロ波発生手段７の発生したマイクロ波を加熱室６に導
く導波管、９はマイクロ波反射板、１０は空気ポンプ、
１１は空気供給路、１２はマイクロ波発生手段７の駆動
電源、１３はマフラー、１４は空気切換バルブ、１５は
排気ガス流切換バルブである。An example of a filter reproducing device using a microwave system is disclosed in Japanese Patent Laid-Open No. 59-126022. The device disclosed in this publication is shown in FIG. In FIG. 7, 1 is an engine, 2 is an exhaust manifold, 3 is an exhaust pipe, 4 is an exhaust branch pipe, 5 is a filter, and 6 is a filter 5.
A heating chamber accommodating therein, 7 is a microwave generating means, 8 is a waveguide for guiding the microwave generated by the microwave generating means 7 to the heating chamber 6, 9 is a microwave reflection plate, 10 is an air pump,
Reference numeral 11 is an air supply path, 12 is a drive power source for the microwave generation means 7, 13 is a muffler, 14 is an air switching valve, and 15 is an exhaust gas flow switching valve.
【０００９】上記した構成において、エンジンの排気ガ
スは排気ガス流切換バルブ１５によってフィルタ５に導
かれたり、直接大気へ排出されたりする。パティキュレ
ート捕集サイクルにおいて、排気ガスはフィルタ５に導
かれ排気ガス中に含まれるパティキュレートはフィルタ
５に捕集されるが前述したようにフィルタ５の捕集能力
は有限である。捕集能力が限界に達すると排気ガス流切
換バルブ１５が制御され排気管３への排気ガスは遮断さ
れ排気ガスのすべては排気分岐管４を経て大気に排出さ
れる。この間にフィルタ５の再生が行われる。このフィ
ルタ再生サイクルにおいてパティキュレートを加熱する
エネルギはマイクロ波発生手段７からまた燃焼に必要な
空気が空気ポンプ１０より同時に供給される。所定の時
間を経てフィルタ再生が完了すると排気ガス流切換バル
ブ１５が再び制御されてフィルタ５に排気ガスが導かれ
る。この捕集と再生のサイクルがくり返される。In the above structure, the exhaust gas of the engine is guided to the filter 5 by the exhaust gas flow switching valve 15 or directly discharged to the atmosphere. In the particulate collection cycle, the exhaust gas is guided to the filter 5 and the particulates contained in the exhaust gas are collected by the filter 5, but the collection capacity of the filter 5 is finite as described above. When the collection capacity reaches the limit, the exhaust gas flow switching valve 15 is controlled so that the exhaust gas to the exhaust pipe 3 is shut off and all the exhaust gas is discharged to the atmosphere via the exhaust branch pipe 4. During this time, the filter 5 is regenerated. In this filter regeneration cycle, the energy for heating the particulates is supplied from the microwave generating means 7 and the air required for combustion is supplied from the air pump 10 at the same time. When the filter regeneration is completed after a predetermined time, the exhaust gas flow switching valve 15 is controlled again to guide the exhaust gas to the filter 5. This cycle of collection and regeneration is repeated.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら上記従来
の構成において、パティキュレートの燃焼用空気はフィ
ルタへの流入に際して、パティキュレートが燃焼可能温
度に達していない領域ではマイクロ波加熱によるパティ
キュレートの昇温を妨げるように作用する。特にフィル
タの空気流入端面では上述の空気による冷却によりその
領域に捕集されたパティキュレートを燃焼除去させるこ
とができない課題を有していた。このためパティキュレ
ート捕集と再生との繰り返しにおいて端面付近部のパテ
ィキュレート堆積が増大しフィルタ効率が低下したり、
フィルタの目詰まりにより排気ガス流入が不可能にな
り、エンジン停止に至る課題があった。However, in the above-mentioned conventional structure, when the air for burning the particulates flows into the filter, the temperature of the particulates is raised by microwave heating in the region where the particulates have not reached the combustible temperature. Acts to prevent. In particular, on the air inflow end surface of the filter, there is a problem that the particulates trapped in the area cannot be burned and removed by the cooling by the air. Therefore, in the repetition of particulate collection and regeneration, particulate accumulation near the end face increases and the filter efficiency decreases,
There was a problem that the exhaust gas could not flow in due to the clogging of the filter and the engine stopped.
【００１１】本発明は上記課題を解決するもので、フィ
ルタの端面部付近に堆積するパティキュレートを効果的
に除去し、再生率の高い内燃機関用フィルタ再生装置を
提供することを目的としたものである。The present invention has been made to solve the above problems, and an object of the present invention is to provide a filter regeneration device for an internal combustion engine, which is capable of effectively removing particulates deposited near the end face portion of the filter and having a high regeneration rate. Is.
【００１２】[0012]
【課題を解決するための手段】本発明は上記目的を達成
するため、内燃機関の排気ガス中に含まれるパティキュ
レートを捕集するフィルタと、前記フィルタを収納する
加熱室と、前記加熱室に給電されるマイクロ波を発生す
るマイクロ波発生手段と、前記フィルタに酸素を含む気
体を供給する送風手段を備え、前記送風手段は排気ガス
流通方向と同じ方向に気体を流す順方向送風手段と、排
気ガス流通方向と反対方向に気体を流す逆方向送風手段
とを備えたものである。In order to achieve the above object, the present invention provides a filter for collecting particulates contained in exhaust gas of an internal combustion engine, a heating chamber for accommodating the filter, and a heating chamber. Microwave generating means for generating a microwave to be fed, and a blower means for supplying a gas containing oxygen to the filter, the blower means is a forward blower means for flowing the gas in the same direction as the exhaust gas flow direction, It is provided with a reverse air blower for flowing gas in a direction opposite to the exhaust gas flow direction.
【００１３】また、送風の方向を変えるために、フィル
タの排気ガス流通方向と同じ方向または反対方向に気体
の流れを切り換える空気流路切り換え手段をそなえた送
風手段を備えたものである。Further, in order to change the direction of air flow, there is provided an air flow means having an air flow path switching means for switching the flow of gas in the same direction as the exhaust gas circulation direction of the filter or in the opposite direction.
【００１４】さらに、端面部の再生を効率よく行うため
に、フィルタに捕集されたパティキュレートは前記マイ
クロ波発生手段によりマイクロ波で加熱され前記送風手
段により供給される空気で燃焼し、フィルタを再生する
構成で、前記送風手段の送風方向はパティキュレートの
再生開始時の方向と終了時の方向では逆方向に送風する
構成としたものである。Further, in order to efficiently regenerate the end surface portion, the particulates collected by the filter are heated by the microwave by the microwave generating means and burned by the air supplied by the blower means, so that the filter is filtered. The air is blown by the blowing means in a direction opposite to the direction in which the particulates start to be played and the direction in which the particulates are played.
【００１５】[0015]
【作用】本発明は上記した構成により、マイクロ波でフ
ィルタを加熱し、燃焼用気体を供給して加熱する際に、
気体のフィルタへの流入方向を逆転させ、フィルタの気
体流入端面に生じるパティキュレートの不燃部分を減少
させフィルタの再生効率を高くする。また、燃焼用空気
の送風方向を逆転することで、燃焼熱の発散を少なく
し、再生装置の効率を向上させる。According to the present invention, with the above-described structure, when the filter is heated by the microwave and the combustion gas is supplied and heated,
By reversing the inflow direction of the gas into the filter, the incombustible portion of the particulates generated on the gas inflow end surface of the filter is reduced and the regeneration efficiency of the filter is increased. Further, by reversing the blowing direction of the combustion air, the divergence of combustion heat is reduced and the efficiency of the regenerator is improved.
【００１６】この結果、フィルタの端面およびその近傍
のパティキュレートが除去されフィルタの機能を効率よ
く永続させることができるとともに、排気ガス流入端面
部の目詰まりの心配もない。As a result, the particulates on the end surface of the filter and in the vicinity thereof can be removed, and the function of the filter can be efficiently perpetuated, and there is no concern about clogging of the exhaust gas inflow end surface.
【００１７】[0017]
【実施例】以下本発明の実施例を図面を参照して説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】図１において、１６はエンジン、１７は内
燃機関の排気ガスを排出する排気管、１８は排気管１７
の途中に設けられた加熱室、１９は加熱室内に収納され
排気ガスが通過する間に排気ガス中に含まれるパティキ
ュレートを捕集するフィルタ、２０は加熱室１８に給電
するマイクロ波を発生させるマイクロ波発生手段、２１
はマイクロ波発生手段２０の発生したマイクロ波を加熱
室１８に伝送する導波管、２２および２３は加熱室１８
に酸素を含む気体を供給する送風供給手段である。この
２つの送風手段のうち２２はエンジン１からの排気ガス
と同じ方向に気体を供給する順方向送風手段であり、２
３はそれと反対方向に気体を供給する逆方向送風手段で
ある。図中の矢印ａが順方向、矢印ｂが逆方向を示す。
２４はフィルタ１９の再生時に、排気ガスをバイパスさ
せる排気分岐管、２５はマフラーである。エンジン１か
らの排気ガスは切り換えバルブ２６により、通常パティ
キュレート捕集フィルタを通過し、フィルタの再生時に
排気管２４を通過する。送風手段２２，２３からの空気
を含む気体は、切り換えバルブ２７，２８，２９の開閉
により送風経路が切り換わり流れる方向を制御される。In FIG. 1, 16 is an engine, 17 is an exhaust pipe for discharging exhaust gas of an internal combustion engine, and 18 is an exhaust pipe 17.
, 19 is a heating chamber provided in the middle of the heating chamber, 19 is a filter for collecting particulates contained in the exhaust gas while the exhaust gas passes through the heating chamber, and 20 is a microwave for supplying power to the heating chamber 18. Microwave generation means, 21
Is a waveguide for transmitting the microwave generated by the microwave generation means 20 to the heating chamber 18, and 22 and 23 are heating chambers 18.
It is a blower supply means for supplying a gas containing oxygen to. Of these two blowers, 22 is a forward blower that supplies gas in the same direction as the exhaust gas from the engine 1.
Reference numeral 3 is a backward air blowing means for supplying gas in the opposite direction. The arrow a in the figure indicates the forward direction, and the arrow b indicates the reverse direction.
Reference numeral 24 is an exhaust branch pipe that bypasses exhaust gas when the filter 19 is regenerated, and 25 is a muffler. Exhaust gas from the engine 1 is normally passed through the particulate collection filter by the switching valve 26, and is passed through the exhaust pipe 24 when the filter is regenerated. The direction of flow of the gas containing air from the air blowing means 22 and 23 is controlled by opening and closing the switching valves 27, 28 and 29 to switch the air blowing path.
【００１９】３０はフィルタ１８の外周と加熱室内壁と
の間に設けられた断熱材であり、加熱室内へのフィルタ
支持をも兼ねている。Reference numeral 30 denotes a heat insulating material provided between the outer periphery of the filter 18 and the wall of the heating chamber, which also serves as a filter support in the heating chamber.
【００２０】排気ガスはエンジン１より排気管１７を流
れフィルタ１９に流入される。フィルタ１９は、排気ガ
スに含まれるパティキュレートを捕集する機能を有して
いる。このフィルタ１９に捕集されたパティキュレート
の量が増大すると、フィルタ１９の圧損が増大し内燃機
関であるエンジン１の負荷が増加するとともに最悪の場
合にはエンジン停止に至る。Exhaust gas flows from the engine 1 through the exhaust pipe 17 and into the filter 19. The filter 19 has a function of collecting particulates contained in the exhaust gas. When the amount of particulates collected by the filter 19 increases, the pressure loss of the filter 19 increases, the load of the engine 1 which is an internal combustion engine increases, and in the worst case, the engine stops.
【００２１】したがって適当な時期にフィルタ１９に捕
集されたパティキュレートを除去する必要がある。この
適当な時期の判断手段としては、フィルタ１９の圧損レ
ベル検出、電気的手段によるパティキュレート捕集量の
検出あるいはエンジン１の動作時間と状態の積算値など
によってなされる。Therefore, it is necessary to remove the particulates collected by the filter 19 at an appropriate time. As means for determining the appropriate time, the pressure loss level of the filter 19 is detected, the particulate collection amount is detected by electric means, or the operating time of the engine 1 and the integrated value of the state are used.
【００２２】次にフィルタ再生の基本プロセスを説明す
る。フィルタ１９が捕集したパティキュレート捕集量が
フィルタ再生を実行すべき捕集量領域に達すると、フィ
ルタ再生プロセスが開始する。この再生制御指令は本装
置の一構成要素である制御部より発せられる。この制御
部の指令に基づいて、まず切り換えバルブ２６が動作
し、排気ガスを排気分岐管２４に導く。次に、マイクロ
波発生手段２０に駆動電力が供給される。マイクロ波発
生手段２０が発生するマイクロ波は導波管２１を伝送し
てフィルタ１９の排気ガス下流側の端より加熱室内に給
電される。これにより、フィルタ１９の排気ガス下流側
近傍に捕集されたパティキュレートが他の領域のパティ
キュレートに比べて強くマイクロ波加熱される。適当な
時間経過後、フィルタ１９の排気ガス下流側に存在する
パティキュレートは燃焼可能温度に到達する。Next, the basic process of filter regeneration will be described. The filter regeneration process begins when the particulate collection volume collected by the filter 19 reaches the collection volume region where filter regeneration should be performed. This reproduction control command is issued from the control unit, which is a component of this apparatus. Based on the command from the control unit, the switching valve 26 first operates to guide the exhaust gas to the exhaust branch pipe 24. Next, drive power is supplied to the microwave generation means 20. The microwave generated by the microwave generation means 20 is transmitted through the waveguide 21 and is fed from the end of the filter 19 on the exhaust gas downstream side into the heating chamber. As a result, the particulate matter collected in the vicinity of the exhaust gas downstream side of the filter 19 is microwave-heated more strongly than the particulate matter in other regions. After an appropriate time has elapsed, the particulates present on the exhaust gas downstream side of the filter 19 reach the combustible temperature.
【００２３】この後に、送風手段２２，２３が動作はじ
め、同時にバルブ２７，２８，２９が制御される。その
結果、適当な流量の酸素を含む気体が送風手段２２，２
３より加熱室１８へ供給される。この気体によってフィ
ルタ１９に捕集され、マイクロ波で高温化されたパティ
キュレートが燃焼状態に移行する。この燃焼領域は酸素
を含む気体の流通方向に移動しつつフィルタ径方向に拡
大していき、適当な時間を経てフィルタ１９のパティキ
ュレートが燃焼し除去される。 図２、図３、図４は、
加熱室１８部の断面図で、送風手段による気体の供給方
向とパティキュレートの燃焼状態を示す。図２、図３、
図４において、フィルタ１９の網かけ部分３１は、捕集
されたパティキュレートを示し、それ以外の網かけがな
いフィルタ部分は、パティキュレートが燃焼再生された
領域である。After this, the blowing means 22 and 23 start to operate, and at the same time, the valves 27, 28 and 29 are controlled. As a result, the gas containing oxygen at an appropriate flow rate is blown by the blowing means 22, 2.
3 is supplied to the heating chamber 18. The particulates trapped by the gas in the filter 19 and heated to a high temperature by microwaves are transferred to a combustion state. This combustion region expands in the filter radial direction while moving in the flow direction of the gas containing oxygen, and the particulates of the filter 19 are burned and removed after an appropriate time. 2, FIG. 3, and FIG.
FIG. 3 is a cross-sectional view of the heating chamber 18 showing the gas supply direction by the blowing means and the particulate combustion state. 2, 3,
In FIG. 4, the shaded portion 31 of the filter 19 shows the collected particulates, and the other filter portions without the shaded areas are areas where the particulates are burned and regenerated.
【００２４】図２は、フィルタ再生時の送風制御の一例
で、酸素を含んだ気体の送風方向を排ガス流入と逆方向
ｂより供給したときのパティキュレートの燃焼状態を示
す。上から順番にパティキュレートの燃焼再生が進んで
いく様子を示している。FIG. 2 shows an example of ventilation control at the time of filter regeneration, and shows a combustion state of particulates when the ventilation direction of the gas containing oxygen is supplied from the direction b opposite to the exhaust gas inflow. It shows how the combustion and regeneration of particulates proceed in order from the top.
【００２５】マイクロ波発生手段２０によるマイクロ波
で加熱されたパティキュレートは、逆方向送風手段によ
り酸素を供給されると酸化燃焼を始める。燃焼を始める
位置はマイクロ波を給電する側の近傍からであるが、フ
ィルタ１９の端面部分は送風手段の気体が燃焼に必要な
温度でなく、パティキュレートを冷却するため燃焼しな
い。したがって、図２に示すように、フィルタ１９の端
面部を残してパティキュレートの燃焼が進行する。The particulates heated by the microwave of the microwave generating means 20 start oxidative combustion when oxygen is supplied by the backward air blowing means. The position where the combustion starts is from the vicinity of the side to which the microwave is fed, but the end face portion of the filter 19 does not burn because the gas of the blowing means does not have the temperature required for burning and cools the particulates. Therefore, as shown in FIG. 2, the combustion of particulates proceeds while leaving the end surface portion of the filter 19.
【００２６】パティキュレートが燃焼を始めると、その
燃焼熱とマイクロ波発生手段２０から供給されるマイク
ロ波により残りのパティキュレートが加熱され、酸素供
給側の反対方向へ燃え広がり、やがて反対側まで燃焼し
再生が完了する。このような再生では、送風側のパティ
キュレートが燃え残ってしまいフィルタの再生率はあま
り高くすることができない。この結果、短期間に再生サ
イクルを繰り返す必要があり、システムの効率の低い排
ガス浄化装置となる。When the particulates start burning, the heat of combustion and the microwaves supplied from the microwave generating means 20 heat the remaining particulates, spread in the opposite direction to the oxygen supply side, and eventually burn to the opposite side. Playback is complete. In such regeneration, the particulates on the blower side are still burned and the regeneration rate of the filter cannot be made too high. As a result, it is necessary to repeat the regeneration cycle in a short period of time, and the exhaust gas purifying apparatus has a low system efficiency.
【００２７】図３は、本発明の排ガス浄化装置におい
て、フィルタ再生時の送風手段による送風手段の制御シ
ーケンスを示す。酸素を含んだ空気を再生の開始時は排
ガス流入と同方向ａより順方向送風手段２２により供給
し、再生の後半において反対の逆方向ｂに逆方向送風手
段２３により供給しフィルタ１９の再生を行う本発明の
例である。図２と同様、上から順にパティキュレートの
燃焼再生が進む状態を示している。FIG. 3 shows a control sequence of the blowing means by the blowing means at the time of filter regeneration in the exhaust gas purifying apparatus of the present invention. At the start of the regeneration, the air containing oxygen is supplied by the forward blower 22 from the same direction a as the exhaust gas inflow, and in the latter half of the regeneration, it is supplied by the reverse blower 23 to the reverse blower 23 to regenerate the filter 19. It is an example of the present invention to be performed. Similar to FIG. 2, the state in which the combustion regeneration of particulates proceeds from the top is shown.
【００２８】このように酸素を供給した場合、再生の開
始時はマイクロ波発生手段２０側の近傍からパティキュ
レートが燃焼開始する。これは、パティキュレートの加
熱がマイクロ波給電付近で大きいことによる。続いて、
燃焼は風下に広がりフィルタ１９のマイクロ波給電側の
端面３２まで達する。その後、酸素供給を反対方向にす
ると、残りのパティキュレートが燃焼を開始し、逆方向
に燃え広がる。そして、フィルタ１９の反対側の端面３
３まで燃焼し、再生が完了する。When oxygen is supplied in this way, the particulates start burning from the vicinity of the microwave generating means 20 side at the start of regeneration. This is because the particulate heating is large near the microwave power supply. continue,
The combustion spreads leeward and reaches the end surface 32 of the filter 19 on the microwave feeding side. Then, when the oxygen supply is reversed, the remaining particulates start burning and spread in the opposite direction. Then, the end surface 3 on the opposite side of the filter 19
Burns up to 3 and regeneration is complete.
【００２９】このように再生の途中で送風方向を反転さ
せると、フィルタ１９の両端面部の再生が可能なため、
効率の高いフィルタ再生装置を実現できる。By reversing the blowing direction during the regeneration as described above, the both end portions of the filter 19 can be regenerated.
A highly efficient filter regeneration device can be realized.
【００３０】図４には、図３とは逆に再生の初期に逆方
向ｂ、再生の終わりには順方向ａに気体を送風手段によ
り供給した場合のパティキュレート燃焼状態を示したも
のである。Contrary to FIG. 3, FIG. 4 shows a particulate combustion state in which gas is supplied in the reverse direction b at the beginning of regeneration and in the forward direction a at the end of regeneration by the blowing means. .
【００３１】なお、マイクロ波発生手段２０の動作はフ
ィルタ１９のパティキュレート燃焼が完了するまで継続
する必要はなく、供給気体の下流側に存在するパティキ
ュレートが燃焼状態に移行した後、適当な時期に停止さ
せたりマイクロ波パワーを低下させたりすることができ
る。The operation of the microwave generating means 20 does not have to be continued until the particulate combustion of the filter 19 is completed, and after the particulates present on the downstream side of the supply gas have transitioned to the combustion state, an appropriate time is required. It can be stopped or the microwave power can be reduced.
【００３２】図５に本発明の排ガス浄化装置の他の実施
例の構成図を示す。図１と同じ構成要素は同符号を付し
て説明を省略する。FIG. 5 shows a block diagram of another embodiment of the exhaust gas purifying apparatus of the present invention. The same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
【００３３】図５において、３２は送風手段であり、送
風方向切り換えバルブ３３により、順方向ａと逆方向ｂ
を切り換えている。このような構成にすることで、気体
を送るための装置であるコンプレッサまたはファンが一
つで、フィルタ１９に捕集されたパティキュレートへ２
方向から酸素を供給可能である。前述のようにパティキ
ュレート再生の過程で切り換えバルブで送風方向を制御
することで、フィルタの再生率を向上することができ
る。In FIG. 5, reference numeral 32 denotes an air blowing means, which is a forward air direction a and a reverse direction b by a ventilation direction switching valve 33.
Is being switched. With such a configuration, one device for sending the gas, that is, the compressor or the fan, is provided to the particulates trapped by the filter 19.
Oxygen can be supplied from the direction. As described above, the regeneration rate of the filter can be improved by controlling the blowing direction with the switching valve in the process of particulate regeneration.
【００３４】図６は、本発明の実施例における送風手段
の他の構成である。図１と同じ構成要素は同符号を付し
て説明を省略する。FIG. 6 shows another structure of the blowing means in the embodiment of the present invention. The same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
【００３５】図６において送風手段３４は双方向に、気
体を流すことが可能なものである。すなわち、送風用の
モータを正転および逆転させて、送風方向を順方向ａお
よび逆方向ｂに切り換える。このような構成にすると送
風方向を反転させる装置が簡単になる。ただし、逆方向
送風の際に燃焼直後の気体が送風手段３４に流入するの
で送風手段３４の耐熱設計が必要である。In FIG. 6, the blowing means 34 is capable of flowing gas in both directions. That is, the air blowing motor is rotated in the forward and reverse directions to switch the air blowing direction between the forward direction a and the backward direction b. With such a configuration, the device for reversing the blowing direction becomes simple. However, since the gas immediately after combustion flows into the blower means 34 during the backward blow, the heat-resistant design of the blower means 34 is required.
【００３６】上述のように、フィルタに送風する気体の
供給方向を切り換えることで、フィルタの機能はより完
全に再生され、フィルタの初期性能を永続させることが
できる。As described above, by switching the supply direction of the gas blown to the filter, the function of the filter is more completely regenerated and the initial performance of the filter can be made permanent.
【００３７】[0037]
【発明の効果】以上説明したように本発明の内燃機関用
フィルタ再生装置によれば、以下の効果が得られる。As described above, according to the filter regenerating apparatus for an internal combustion engine of the present invention, the following effects can be obtained.
【００３８】（１）パティキュレート燃焼に必要な酸素
を含む気体の供給をフィルタの両端面部のどちらからで
も可能な構成のため、フィルタの端面部に捕集されたパ
ティキュレートも燃焼再生することが可能であるため、
フィルタの全領域においての再生ができ効率の高い装置
を実現できる。(1) Since the gas containing oxygen necessary for particulate combustion can be supplied from either end face of the filter, the particulates collected on the end face of the filter can also be regenerated by combustion. Because it is possible
It is possible to realize a highly efficient device capable of reproducing in all areas of the filter.
【００３９】（２）フィルタに送風する方向を流路切り
換えバルブにより反対方向に替える構成なので空気ポン
プ、コンプレッサ、ファンなどの送風手段が一つで、フ
ィルタに送る空気の順方向と逆方向に切り換えることが
でき、低コストで装置の再生率を向上できる。(2) Since the direction in which air is blown to the filter is changed to the opposite direction by the flow path switching valve, there is only one blowing means such as an air pump, a compressor, a fan, and the air is sent to the filter in the forward and reverse directions. Therefore, the regeneration rate of the device can be improved at low cost.
【００４０】（３）フィルタの再生開始時と終了時で、
酸素を含む気体をフィルタに供給する方向を逆にしてい
るので、フィルタの端面の両側のパティキュレートを再
生することができフィルタ全域のより完全な再生を実行
することができる。(3) At the start and end of filter regeneration,
Since the direction in which the gas containing oxygen is supplied to the filter is reversed, the particulates on both sides of the end surface of the filter can be regenerated, and more complete regeneration of the entire area of the filter can be performed.
【図１】本発明の第１の実施例における内燃機関用フィ
ルタ再生装置の構成図FIG. 1 is a configuration diagram of a filter regeneration device for an internal combustion engine according to a first embodiment of the present invention.
【図２】従来の装置によるフィルタの再生状態を示す断
面図FIG. 2 is a cross-sectional view showing a regenerated state of a filter by a conventional device.
【図３】本発明の装置によるフィルタの再生状態を示す
断面図FIG. 3 is a sectional view showing a regenerated state of a filter by the device of the present invention.
【図４】本発明の第２の実施例におけるフィルタの再生
状態を示す断面図FIG. 4 is a sectional view showing a regenerated state of a filter according to a second embodiment of the present invention.
【図５】本発明の第２の実施例における内燃機関用フィ
ルタ再生装置の構成図FIG. 5 is a configuration diagram of an internal combustion engine filter regenerating apparatus according to a second embodiment of the present invention.
【図６】本発明の第３の実施例における内燃機関用フィ
ルタ再生装置の構成図FIG. 6 is a configuration diagram of an internal combustion engine filter regenerating apparatus according to a third embodiment of the present invention.
【図７】従来の内燃機関用フィルタ再生装置の構成図FIG. 7 is a configuration diagram of a conventional filter regeneration device for an internal combustion engine.
１８ 加熱室 １９ フィルタ ２０ マイクロ波発生手段 ２２、２３、３２、３４ 送風手段 ２２ 順方向送風手段 ２３ 逆方向送風手段 ３３ 空気流路切り換え手段 18 heating chamber 19 filter 20 microwave generation means 22, 23, 32, 34 blower means 22 forward blower means 23 reverse blower means 33 air flow path switching means
Claims (3)
ュレートを捕集するフィルタと、前記フィルタを収納す
る加熱室と、前記加熱室に給電されるマイクロ波を発生
するマイクロ波発生手段と、前記フィルタに酸素を含む
気体を供給する送風手段を備え、前記送風手段は排気ガ
ス流通方向と同じ方向に気体を流す順方向送風手段と、
排気ガス流通方向と反対方向に気体を流す逆方向送風手
段とからなる内燃機関用フィルタ再生装置。1. A filter for collecting particulates contained in exhaust gas of an internal combustion engine, a heating chamber for accommodating the filter, and microwave generation means for generating microwaves supplied to the heating chamber. The filter includes a blower that supplies a gas containing oxygen, and the blower is a forward blower that causes the gas to flow in the same direction as the exhaust gas flow direction.
A filter regeneration device for an internal combustion engine, comprising a reverse air blower for flowing gas in a direction opposite to the exhaust gas flow direction.
たは反対方向に気体の流れを切り換える空気流路切り換
え手段をそなえた送風手段を備えた請求項１記載の内燃
機関用フィルタ再生装置。2. A filter regenerating apparatus for an internal combustion engine according to claim 1, further comprising an air blowing means having an air flow passage switching means for switching the flow of gas in the same direction as or a direction opposite to the exhaust gas flow direction of the filter.
再生開始時の方向と終了時の方向では逆方向に送風する
請求項１または請求項２記載の内燃機関用フィルタ再生
装置。3. A filter regenerating apparatus for an internal combustion engine according to claim 1 or 2, wherein the blowing means blows air in opposite directions to the direction at the beginning and end of regeneration of the particulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4263324A JPH06117218A (en) | 1992-10-01 | 1992-10-01 | Filter regenerative device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4263324A JPH06117218A (en) | 1992-10-01 | 1992-10-01 | Filter regenerative device for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06117218A true JPH06117218A (en) | 1994-04-26 |
Family
ID=17387895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4263324A Pending JPH06117218A (en) | 1992-10-01 | 1992-10-01 | Filter regenerative device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06117218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108350779A (en) * | 2015-09-15 | 2018-07-31 | Fsx设备股份有限公司 | Device and method for cleaning diesel particulate filter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04259619A (en) * | 1991-02-12 | 1992-09-16 | Matsushita Electric Ind Co Ltd | Regenerating device for filter of internal combustion engine and regeneration controlling method |
-
1992
- 1992-10-01 JP JP4263324A patent/JPH06117218A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04259619A (en) * | 1991-02-12 | 1992-09-16 | Matsushita Electric Ind Co Ltd | Regenerating device for filter of internal combustion engine and regeneration controlling method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108350779A (en) * | 2015-09-15 | 2018-07-31 | Fsx设备股份有限公司 | Device and method for cleaning diesel particulate filter |
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