JP3598572B2 - Exhaust particulate purification equipment - Google Patents

Exhaust particulate purification equipment Download PDF

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Publication number
JP3598572B2
JP3598572B2 JP8919095A JP8919095A JP3598572B2 JP 3598572 B2 JP3598572 B2 JP 3598572B2 JP 8919095 A JP8919095 A JP 8919095A JP 8919095 A JP8919095 A JP 8919095A JP 3598572 B2 JP3598572 B2 JP 3598572B2
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Prior art keywords
filter
amount
exhaust
regeneration
collection
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JPH08284643A (en
Inventor
秀治 吉田
信史 保浦
恵一 加藤
尚治 森田
隆之 戸谷
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Denso Corp
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Denso Corp
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    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • 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)

Description

【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に含まれる排気微粒子（パティキュレート）をフィルタを用いて捕集し、その捕集した排気微粒子を燃焼させてフィルタを再生させる排気微粒子浄化装置に関する。
【０００２】
【従来の技術】
この排気微粒子浄化装置においては、ディーゼルエンジンの排気通路に配置されたセラミック製のフィルタにより排気ガス中の排気微粒子を捕集し、捕集した排気微粒子の量（捕集量）を検出して再生時期を判定するようにしている（特開平６ー２６３２７号公報）。そして、再生時期が判定されると、フィルタに付着した排気微粒子を燃焼してフィルタの再生を行う。
【０００３】
【発明が解決しようとする課題】
しかしながら、再生する捕集量が少ない場合は燃え残りなどが発生し不完全な再生となり、また捕集量が多い場合は再生温度が過度に上昇し、フィルタ割れ溶損などの問題が発生する。
従って、捕集量が所定範囲内の値になった時に、フィルタの再生を行う必要があるが、何らかの理由、例えば捕集量以外の再生開始条件を設けている時にその条件が長い間成立しない時あるいは再生を行う部品の故障で再生が出来なかったような場合には、過捕集状態で再生を開始してしまい、上記した再生温度の過度の上昇による問題が発生する。
【０００４】
本発明は上記問題に鑑みたもので、過捕集状態にあることを検出して、その時には再生を行わないようにすることを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するため、請求項１に記載の発明においては、ディーゼルエンジン（１）運転時の常時において上流側よりの全ての排気を内部通過させる排気流路に設けられ排気微粒子を捕集するフィルタ（７）と、このフィルタに捕集された排気微粒子を燃焼させて前記フィルタを再生する再生手段（８および図示しないエアポンプ）と、前記フィルタに捕集された排気微粒子の量に応じて前記再生手段を制御する制御手段（３）とを備えた排気微粒子浄化装置において、前記制御手段は、前記フィルタの微粒子捕集量を検出する捕集量検出手段（１０１〜１０４）を備え、この検出された微粒子捕集量が過捕集状態を示す値以上になった時に、前記再生手段による前記フィルタの再生を禁止する（１０５）ことを特徴としている。
【０００６】
請求項２に記載の発明では、ディーゼルエンジン（１）の排気流路に設けられ排気微粒子を捕集するフィルタ（７）と、このフィルタに捕集された排気微粒子を燃焼させて前記フィルタを再生する再生手段（８および図示しないエアポンプ）と、前記フィルタに捕集された排気微粒子の量に応じて前記再生手段を制御する制御手段（３）とを備えた排気微粒子浄化装置において、前記制御手段は、前記フィルタの微粒子捕集量を検出する捕集量検出手段（１０１〜１０４）と、前記再生手段による再生が可能な状態であることを判定する状態判定手段とを備え、前記検出された微粒子捕集量が再生を必要とする最低捕集量と最高捕集量の間の再生範囲内の値にあり、かつ前記状態判定手段により前記再生が可能な状態であることが判定されたときには、前記フィルタの再生を行うようにし、前記検出された微粒子捕集量が前記最高捕集量以上である過捕集状態を示す値以上になったときには、前記フィルタの再生を行わないようにすることを特徴としている。
【０００７】
請求項３に記載の発明では、請求項１または２に記載の排気微粒子浄化装置において、前記検出された微粒子捕集量が過捕集状態を示す値以上になった時に警告を行う警告手段（１６、１０８、１０９）を有することを特徴とする。なお、上記各手段のカッコ内の符号等は、後述する実施例記載の具体的手段との対応関係を示すものである。
【０００８】
【発明の作用効果】
請求項１乃至３に記載の発明によれば、フィルタの微粒子捕集量が過捕集状態を示す値以上になった時にそのフィルタの再生を禁止するようにしているから、過捕集状態時の再生を行わないようにして、再生温度の過度の上昇によるフィルタ割れ溶損などの問題をなくすことができる。
【０００９】
【実施例】
以下、本発明を図に示す実施例について説明する。
図１には、ディーゼルエンジンの排気浄化装置の全体構成を示す。
ディーゼルエンジン１の吸入側にはエアクリーナ２が設けられており、その吸入流量を検知するための熱線式流量センサ３がエアクリーナ２からディーゼルエンジン１への流路の途中に設けられている。
【００１０】
ディーゼルエンジン１の排気管４には排気浄化装置５が設けられている。排気浄化装置５は排気管４と連通するハウジング６を有しており、このハウジング６内を排気ガスが通過していく。
ハウジング６内にはフィルタ７が配置され、このフィルタ７はセラミック多孔からなり、それに排気ガスが通過することにより排気ガス中の排気微粒子が捕集される。また、このフィルタ７の上流端面には電気ヒータ８が設けられており、フィルタ７の再生時に排気微粒子に着火する。なお、フィルタ７の再生時には図示しないエアポンプから排気微粒子の燃焼に必要な空気が供給される。従って、電気ヒータ８およびエアポンプにて、フィルタ７に捕集された排気微粒子を燃焼させてフィルタ７を再生する再生手段を構成している。
【００１１】
さらに、排気浄化装置５には、フィルタ７のディーゼルエンジン１側の絶対圧力（前圧）を検知する圧力センサ９、フィルタ７の排気側の絶対圧力（後圧）を検知する圧力センサ１０が設けられている。また、ディーゼルエンジン１からフィルタ７に流れ込む排気温度を検出する温度センサ１１、フィルタ７から流出する排気温度を検出する温度センサ１２が設けられている。
【００１２】
そして、各センサからの信号は電子制御ユニット（ＥＣＵ）１３に入力される。このＥＣＵ１３内にはＣＰＵ１４が設けられており、各センサ信号は最終的にはＣＰＵ１４に入力される。このＣＰＵ１４は、排気微粒子の捕集量を演算して再生時期を判定し、この再生時期判定時にフィルタ７を再生させる演算処理を実行する。
【００１３】
また、ＣＰＵ１４は、フィルタ７の過捕集状態を判定した時には警告灯１５を点灯させ、運転者に警告を行う処理も行う。
上記構成において、その作動を、ＣＰＵ１４の演算処理を示す図２のフローチャートを基に説明する。
まず、センサ３、９〜１２からのセンサ値を取り込む（ステップ１０１）。この取り込んだセンサ値によりステップ１０２、１０３の処理を行う。すなわち、圧力センサ９にて検出した前圧Ｐ１から圧力センサ１０にて検出した後圧Ｐ２を引くことによりフィルタ７の差圧ΔＰ（＝Ｐ１−Ｐ２）を求め（ステップ１０２）、続いて熱線式流量センサ３にて検出した吸入空気質量流量Ｇ、上記前圧Ｐ１、および温度センサ１１にて検出した入ガス温度と温度センサ１２にて検出した出ガス温度の平均温度Ｔｅｘから、フィルタ７に流入する体積流量Ｖをｆ（Ｇ、Ｔｅｘ、Ｐ１）にて求める（ステップ１０３）。この関数ｆは、吸入空気質量流量を排気ガスの温度、圧力により排気体積流量換算するための関数である。
【００１４】
次に、上記求めたフィルタ差圧ΔＰ、フィルタ７に流入する体積流量Ｖから、排気微粒子の捕集量ＰＭｑをｇ（ΔＰ、Ｖ）にて求める（ステップ１０４）。この関数ｇは、基本的には差圧ΔＰを体積流量Ｖで割った値を求めるように設定されたものである。この関数を用いて求められた値は通気抵抗、すなわちフィルタの目詰まり量を示すものであり、それを捕集量としている。
【００１５】
この後、求められた捕集量ＰＭｑが、安定にフィルタを再生させることができる最低捕集量ＰＭｑ１と最高捕集量ＰＭｑ２の間の再生範囲内、すなわち再生判定領域内の値にあるか否かを判定する（ステップ１０５）。
捕集量がまだ少なく捕集量ＰＭｑが最低捕集量ＰＭｑ１に達していない場合には、ステップ１０５から１０７を介してステップ１０１に戻り、上記演算処理を繰り返し実行する。
【００１６】
その後、捕集量ＰＭｑが上記した再生判定領域内の値に入ると、ステップ１０５の判定がＹＥＳになり、続いて再生可能なシステム状態にあるか否かを判定する（ステップ１０６）。再生可能なシステム状態とは、例えば熱線式流量センサ３から算出されるエンジン回転数が所定値以上、温度センサ１１の入ガス温度から求められる再生直前のフィルタ温度が所定値以上、再生を行う部品（電気ヒータ８、エアポンプ等）が故障による再生禁止状態になっていない（この処理については図示してないがＣＰＵ１４において故障検出が行われている）こと等の状態をいう。
【００１７】
このステップ１０６の判定がＹＥＳになると、再生制御ルーチン２００にて再生制御を行う。この再生制御ルーチン２００では、電気ヒータ８および図示しないエアポンプを作動させて、フィルタ７に捕集された排気微粒子を燃焼させる公知の処理を行う。
なお、捕集量ＰＭｑがステップ１０５の再生判定領域内の値になった場合であっても、再生可能なシステム状態にない場合には、ステップ１０６の判定がＹＥＳにならないため、再生制御が行われない。このような再生不可能なシステム状態が長時間継続し、捕集量ＰＭｑが最高捕集量ＰＭｑ２を越えてしまうと、ステップ１０５の判定がＮＯになり、次のステップ１０７の判定がＹＥＳになり、過捕集と判定して警告灯１６を点灯させ、運転者に過捕集状態を知らせる。
【００１８】
この後は、捕集量ＰＭｑの値が大きくなっていくため、その値が上記した再生判定領域内の値にならず、フィルタ７の再生処理は行われない。すなわち、捕集量ＰＭｑが最高捕集量以上になった時に、フィルタ７の再生は禁止される。
なお、そのような再生の禁止状態になった場合には、フィルタ７の交換等を行う必要があるが、それが行われるまではフィルタの目詰まりがどんどん進行していってしまうため、一定時間後、エンジンへの燃料供給を停止させるなどしてエンジンを停止させるようにしてもよい。
【００１９】
なお、上記実施例では、捕集量以外の再生開始条件、すなわちステップ１０６のシステム状態判定処理が設けられているものを示したが、そのようなシステム状態判定処理がなく、捕集量のみによって再生開始を行うようにしたものにおいても、再生を行う部品の故障等で再生開始タイミングが遅れるような場合には、過捕集状態が生じ得るので、そのようなものにも本発明を適用することができる。
【００２０】
なお、上記実施例において、図２のフローチャートに示す各ステップは、それぞれの機能を実現する機能実現手段として把握されるものであり、それらの機能に対応させたハードロジック構成のものにて構成するようにしてもよい。
【図面の簡単な説明】
【図１】本発明の一実施例を示すディーゼルエンジンの排気浄化装置の全体構成図である。
【図２】図１中のＣＰＵ１４の演算処理を示すフローチャートである。
【符号の説明】
１…ディーゼルエンジン、２…エアクリーナ、３…熱線式流量センサ、
５…排気浄化装置、７…フィルタ、８…電気ヒータ、９、１０…圧力センサ、
１１、１２…温度センサ、１３…ＥＣＵ、１４…ＣＰＵ、１５…警告灯。[0001]
[Industrial applications]
The present invention relates to an exhaust particulate purification device that collects exhaust particulates (particulates) contained in exhaust gas of a diesel engine using a filter and burns the collected exhaust particulates to regenerate the filter.
[0002]
[Prior art]
In this exhaust particulate purification apparatus, exhaust particulates in exhaust gas are collected by a ceramic filter disposed in an exhaust passage of a diesel engine, and the amount (collected amount) of the collected exhaust particulates is detected and reproduced. The timing is determined (JP-A-6-26327). When the regeneration time is determined, the filter regenerates by burning the exhaust particulates attached to the filter.
[0003]
[Problems to be solved by the invention]
However, if the trapping amount to be regenerated is small, unburned residue and the like are generated, resulting in incomplete regeneration. If the trapping amount is large, the regenerating temperature rises excessively, causing problems such as filter cracking and erosion.
Therefore, it is necessary to regenerate the filter when the trapping amount becomes a value within a predetermined range. However, for some reason, for example, when a regeneration start condition other than the trapping amount is set, the condition is not satisfied for a long time. In the case where the reproduction cannot be performed due to a failure of the component to be reproduced or due to a failure of the component to be reproduced, the reproduction is started in an excessively collected state, and the above-described problem due to an excessive increase in the reproduction temperature occurs.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to detect an over-collection state and not to perform regeneration at that time.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the exhaust gas is provided in an exhaust passage through which all exhaust gas from the upstream side passes at all times during operation of the diesel engine (1). A filter (7), a regenerating means (8 and an air pump not shown) for regenerating the filter by burning the exhaust particulates collected by the filter, and the regenerating means (8 and an air pump not shown) according to the amount of the exhaust particulates collected by the filter. In the exhaust particulate cleaning apparatus provided with a control means (3) for controlling the regenerating means, the control means includes a trapped amount detecting means (101 to 104) for detecting a trapped amount of the filter. When the amount of collected fine particles becomes equal to or more than the value indicating the excessive collection state, the regeneration of the filter by the regeneration unit is prohibited (105).
[0006]
According to the second aspect of the present invention, the filter (7) provided in the exhaust passage of the diesel engine (1) for collecting the exhaust particulates, and the filter is regenerated by burning the exhaust particulates collected by the filter. And a control means (3) for controlling the regenerating means in accordance with the amount of exhaust particulates collected by the filter. It includes a collection amount detection means for detecting an amount of particulate matter trapped in the filter (101-104), and a state determining means determines that due to a possible state reproducing said reproducing means, is the detected There the value of the reproduction range between the minimum collection amount and the highest amount of collection of the particulate collection volume requires regeneration, and the to be reproduced is capable state is determined by the state determining means Kiniwa, to perform the regeneration of said filter, said when the detected particulate collection amount is equal to or greater than said maximum collection amount or more is shown an over-collecting state value does not perform regeneration of the filter It is characterized in that way.
[0007]
According to the third aspect of the present invention, in the exhaust particulate cleaning apparatus according to the first or second aspect , a warning unit that issues a warning when the detected amount of trapped particulates is equal to or greater than a value indicating an excessive trapping state. 16, 108, 109). The symbols in parentheses of the above-mentioned means indicate the correspondence with specific means described in the embodiments described later.
[0008]
Operation and Effect of the Invention
According to the first to third aspects of the present invention, the regeneration of the filter is prohibited when the amount of trapped fine particles of the filter is equal to or greater than the value indicating the over-collection state. By not performing the regeneration, it is possible to eliminate problems such as filter cracking and erosion due to an excessive increase in the regeneration temperature.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the overall configuration of an exhaust gas purification device for a diesel engine.
An air cleaner 2 is provided on the intake side of the diesel engine 1, and a hot-wire type flow sensor 3 for detecting the intake flow rate is provided in the middle of a flow path from the air cleaner 2 to the diesel engine 1.
[0010]
The exhaust pipe 4 of the diesel engine 1 is provided with an exhaust purification device 5. The exhaust gas purification device 5 has a housing 6 that communicates with the exhaust pipe 4, and the exhaust gas passes through the housing 6.
A filter 7 is disposed in the housing 6, and the filter 7 is made of a porous ceramic. Exhaust particulates in the exhaust gas are collected by passing the exhaust gas through the filter. An electric heater 8 is provided on the upstream end face of the filter 7, and ignites the exhaust particulates when the filter 7 is regenerated. At the time of regeneration of the filter 7, air necessary for combustion of exhaust particulates is supplied from an air pump (not shown). Therefore, the electric heater 8 and the air pump constitute a regenerating means for regenerating the filter 7 by burning the exhaust fine particles collected by the filter 7.
[0011]
Further, the exhaust gas purification device 5 is provided with a pressure sensor 9 for detecting an absolute pressure (front pressure) of the filter 7 on the diesel engine 1 side and a pressure sensor 10 for detecting an absolute pressure (back pressure) of the filter 7 on the exhaust side. Have been. Further, a temperature sensor 11 for detecting the temperature of exhaust gas flowing into the filter 7 from the diesel engine 1 and a temperature sensor 12 for detecting the temperature of exhaust gas flowing out of the filter 7 are provided.
[0012]
Then, signals from the sensors are input to an electronic control unit (ECU) 13. A CPU 14 is provided in the ECU 13, and each sensor signal is finally input to the CPU 14. The CPU 14 calculates a trapped amount of exhaust particulates to determine a regeneration timing, and executes a computation process for regenerating the filter 7 at the time of the regeneration timing determination.
[0013]
The CPU 14 also performs a process of turning on the warning lamp 15 when it is determined that the filter 7 is in the over-collection state, to warn the driver.
The operation of the above configuration will be described with reference to the flowchart of FIG.
First, sensor values from the sensors 3 and 9 to 12 are fetched (step 101). The processing of steps 102 and 103 is performed based on the acquired sensor values. That is, the pressure difference ΔP (= P1−P2) of the filter 7 is obtained by subtracting the pressure P2 detected by the pressure sensor 10 from the pressure P1 detected by the pressure sensor 9 (step 102). The gas flows into the filter 7 from the intake air mass flow rate G detected by the flow rate sensor 3, the pre-pressure P1, and the average temperature Tex of the incoming gas temperature detected by the temperature sensor 11 and the outgoing gas temperature detected by the temperature sensor 12. The volume flow rate V to be calculated is determined by f (G, Tex, P1) (step 103). This function f is a function for converting an intake air mass flow rate into an exhaust volume flow rate based on the temperature and pressure of exhaust gas.
[0014]
Next, the trapped amount PMq of exhaust particulates is calculated from g (ΔP, V) from the filter differential pressure ΔP and the volume flow rate V flowing into the filter 7 (step 104). This function g is basically set to obtain a value obtained by dividing the differential pressure ΔP by the volume flow rate V. The value obtained by using this function indicates the airflow resistance, that is, the amount of clogging of the filter, which is used as the trapping amount.
[0015]
Thereafter, it is determined whether or not the obtained trapping amount PMq is within a regeneration range between the minimum trapping amount PMq1 and the maximum trapping amount PMq2 at which the filter can be stably regenerated, that is, within a regeneration determination area. Is determined (step 105).
If the trapping amount is still small and the trapping amount PMq has not reached the minimum trapping amount PMq1, the process returns to step 101 via steps 105 to 107 and repeats the above-described arithmetic processing.
[0016]
Thereafter, when the trapping amount PMq falls within the above-described range of the regeneration determination area, the determination in step 105 is YES, and it is determined whether the system is in a reproducible system state (step 106). The regenerable system state is, for example, a component that performs regeneration when the engine speed calculated from the hot-wire flow sensor 3 is equal to or greater than a predetermined value, and the filter temperature immediately before regeneration determined from the gas input temperature of the temperature sensor 11 is equal to or greater than a predetermined value. (Electric heater 8, air pump, etc.) are not in a regeneration prohibited state due to a failure (this process is not shown, but failure detection is performed in CPU 14).
[0017]
When the determination in step 106 is YES, the reproduction control is performed in the reproduction control routine 200. In the regeneration control routine 200, a known process of operating the electric heater 8 and an air pump (not shown) to burn the exhaust fine particles collected by the filter 7 is performed.
Even if the trapping amount PMq has reached the value in the regeneration determination area in step 105, if the system is not in a reproducible system state, the determination in step 106 will not be YES, and the regeneration control will not be performed. I can't. If such an unreproducible system state continues for a long time and the trapping amount PMq exceeds the maximum trapping amount PMq2, the determination in step 105 becomes NO, and the determination in next step 107 becomes YES. , The warning light 16 is turned on to notify the driver of the over-collection state.
[0018]
After that, since the value of the trapping amount PMq increases, the value does not become a value in the above-described regeneration determination region, and the regeneration process of the filter 7 is not performed. That is, when the trapping amount PMq becomes equal to or more than the maximum trapping amount, the regeneration of the filter 7 is prohibited.
When the regeneration is prohibited, the filter 7 needs to be replaced or the like. However, until the filter is clogged, the clogging of the filter progresses rapidly. Thereafter, the engine may be stopped by stopping the fuel supply to the engine.
[0019]
In the above embodiment, the regeneration start condition other than the trapping amount, that is, the condition in which the system state determination process of step 106 is provided, is not provided. Even in the case where the reproduction is started, if the reproduction start timing is delayed due to a failure of a component to be reproduced, an over-collection state may occur, and the present invention is applied to such a case. be able to.
[0020]
In the above embodiment, each step shown in the flowchart of FIG. 2 is grasped as a function realizing means for realizing each function, and is configured with a hardware logic configuration corresponding to those functions. You may do so.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a diesel engine exhaust gas purification apparatus showing one embodiment of the present invention.
FIG. 2 is a flowchart showing a calculation process of a CPU 14 in FIG.
[Explanation of symbols]
1. Diesel engine, 2. Air cleaner, 3. Hot wire flow sensor,
5 exhaust gas purifier, 7 filter, 8 electric heater, 9, 10 pressure sensor,
11, 12: temperature sensor, 13: ECU, 14: CPU, 15: warning light.

Claims (3)

ディーゼルエンジン運転時の常時において上流側よりの全ての排気を内部通過させる排気流路に設けられ排気微粒子を捕集するフィルタと、このフィルタに捕集された排気微粒子を燃焼させて前記フィルタを再生する再生手段と、前記フィルタに捕集された排気微粒子の量に応じて前記再生手段を制御する制御手段とを備えた排気微粒子浄化装置において、
前記制御手段は、前記フィルタの微粒子捕集量を検出する捕集量検出手段を備え、この検出された微粒子捕集量が過捕集状態を示す値以上になった時に、前記再生手段による前記フィルタの再生を禁止することを特徴とする排気微粒子浄化装置。A filter provided in an exhaust passage through which all the exhaust gas from the upstream side passes at all times during operation of the diesel engine, and a filter for collecting exhaust particulates, and the filter is regenerated by burning the exhaust particulates collected by the filter. And a control means for controlling the regenerating means according to the amount of exhaust particulates collected by the filter,
The control means includes a trapping amount detecting means for detecting a trapping amount of the fine particles of the filter, and when the detected trapping amount of the filter becomes equal to or more than a value indicating an excessive collecting state, An exhaust particulate purification device characterized in that regeneration of a filter is prohibited. ディーゼルエンジンの排気流路に設けられ排気微粒子を捕集するフィルタと、このフィルタに捕集された排気微粒子を燃焼させて前記フィルタを再生する再生手段と、前記フィルタに捕集された排気微粒子の量に応じて前記再生手段を制御する制御手段とを備えた排気微粒子浄化装置において、
前記制御手段は、前記フィルタの微粒子捕集量を検出する捕集量検出手段と、前記再生手段による再生が可能な状態であることを判定する状態判定手段とを備え、前記検出された微粒子捕集量が再生を必要とする最低捕集量と最高捕集量の間の再生範囲内の値にあり、かつ前記状態判定手段により前記再生が可能な状態であることが判定されたときには、前記フィルタの再生を行うようにし、前記検出された微粒子捕集量が前記最高捕集量以上である過捕集状態を示す値以上になったときには、前記フィルタの再生を行わないようにすることを特徴とする排気微粒子浄化装置。 A filter provided in the exhaust passage of the diesel engine to collect exhaust particulates; a regeneration unit configured to burn the exhaust particulates collected by the filter to regenerate the filter; and a filter for exhaust particulates collected by the filter. Control means for controlling the regeneration means according to the amount, in the exhaust particulate purification device,
The control unit includes a trapping amount detecting unit that detects a trapping amount of the fine particles of the filter, and a state determining unit that determines that the filter can be regenerated by the regenerating unit. When the collection amount is within a regeneration range between the minimum collection amount and the maximum collection amount that require regeneration, and the state determination unit determines that the regeneration is possible, The filter is to be regenerated, and when the detected amount of trapped fine particles is equal to or more than the value indicating the excessive collection state that is equal to or more than the maximum collection amount, the filter is not regenerated. Exhaust particulate purification equipment. 前記検出された微粒子捕集量が過捕集状態を示す値以上になった時に警告を行う警告手段を有することを特徴とする請求項１または２に記載の排気微粒子浄化装置。 3. The exhaust particulate cleaning device according to claim 1, further comprising a warning unit that issues a warning when the detected particulate collection amount is equal to or greater than a value indicating an excessive collection state.
JP8919095A 1995-04-14 1995-04-14 Exhaust particulate purification equipment Expired - Fee Related JP3598572B2 (en)

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FR2774421B1 (en) * 1998-02-02 2000-04-21 Peugeot SYSTEM FOR MANAGING THE OPERATION OF A PARTICLE FILTER ASSOCIATED WITH A DIESEL ENGINE IN PARTICULAR OF A MOTOR VEHICLE
FR2804177B1 (en) * 2000-01-20 2002-09-20 Peugeot Citroen Automobiles Sa SYSTEM FOR AIDING THE REGENERATION OF A PARTICLE FILTER INTEGRATED IN AN EXHAUST LINE OF A DIESEL ENGINE OF A MOTOR VEHICLE
FR2807470B1 (en) * 2000-04-07 2002-10-18 Peugeot Citroen Automobiles Sa SYSTEM FOR AIDING THE REGENERATION OF A PARTICLE FILTER INTEGRATED IN AN EXHAUST LINE OF A DIESEL ENGINE OF A MOTOR VEHICLE
FR2833995B1 (en) 2001-12-26 2004-07-30 Renault METHOD FOR DETECTING THE UNCONTROLLED REGENERATION OF A PARTICLE FILTER IMPLANTED IN THE EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE
KR100489109B1 (en) * 2002-03-04 2005-05-12 현대자동차주식회사 a method for regeneration of diesel particulate filter
FR2836956B1 (en) 2002-03-08 2004-09-17 Renault PARTICULATE FILTER REGENERATION PROCESS FOR MOTOR VEHICLES
DE10247977A1 (en) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Method and system for checking the functionality of a particle detector
JP4580803B2 (en) * 2005-03-31 2010-11-17 キャタピラー エス エー アール エル Clogging notification device for exhaust gas purification device for internal combustion engine
EP1722082B1 (en) 2005-05-13 2008-10-29 HONDA MOTOR CO., Ltd. Exhaust emission control system for internal combustion engine and control method therefor
JP4609662B2 (en) * 2006-02-17 2011-01-12 三菱自動車工業株式会社 Limp home control equipment
JP5340114B2 (en) * 2009-11-02 2013-11-13 株式会社アイチコーポレーション Work vehicle control device
JP5931328B2 (en) * 2010-09-28 2016-06-08 三菱重工業株式会社 Engine exhaust gas purification device and purification method
CN110469403B (en) * 2019-09-20 2021-08-13 东风汽车集团有限公司 Delay diagnosis method for icing of gasoline engine particle catcher differential pressure pipeline

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