JPS645048Y2 - - Google Patents
Info
- Publication number
- JPS645048Y2 JPS645048Y2 JP1982187104U JP18710482U JPS645048Y2 JP S645048 Y2 JPS645048 Y2 JP S645048Y2 JP 1982187104 U JP1982187104 U JP 1982187104U JP 18710482 U JP18710482 U JP 18710482U JP S645048 Y2 JPS645048 Y2 JP S645048Y2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- exhaust
- temperature
- collection material
- electric heater
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 4
- 238000013021 overheating Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
本考案はデイーゼルエンジンの排気ガス浄化装
置に関し、更に詳しくは、排気ガス中に含まれる
カーボン粒子及びそれと同様な粒状物(排気微粒
子またはパテイキユレート)を物理的方法によつ
てフイルタエレメント等の適切な捕集材に捕集
し、捕集された排気微粒子を周期的に焼却し、捕
集材を再生するに適したパテイキユレートラツプ
の構造に関する。[Detailed Description of the Invention] The present invention relates to an exhaust gas purification device for a diesel engine, and more specifically, it removes carbon particles and similar particulate matter (exhaust particulates or particulates) contained in exhaust gas by a physical method. The present invention relates to a structure of a particulate trap suitable for collecting on a suitable collection material such as a filter element, periodically incinerating the collected exhaust particulates, and regenerating the collection material.
この種の排気微粒子はカーボン粒子のように可
燃性のものがほとんどで、このような可燃性の微
粒子を捕集し、捕集された微粒子を焼却して捕集
材を再生するデイーゼルパテイキユレートトラツ
プは種々公知である。そして捕集パテイキユレー
トを燃焼してトラツプを再生させる手段として一
般に電気ヒータが用いられている。即ち、電気ヒ
ータを捕集材の前端面に取り付け、このヒータに
より捕集材の表面に付着した排気微粒子を燃焼さ
せ、それを熱源として下流の微粒子を自燃させる
ものである。しかしながら従来の斯かるパテイキ
ユレートトラツプにおいては、いずれもヒータの
温度制御を行つているものはなかつた。一般に、
パテイキユレートを確実に着火燃焼させるために
はヒータを数百度の高温にする必要があるが、し
かしながらその温度条件は本来、トラツプを通る
排気ガスの流速、あるいは電源のバツテリ電圧の
変動により変化してしかるべきものである。さも
なければ、即ちヒータ温度を制御しなければ排気
ガス流速が低下したりあるいはバツテリ電圧が上
昇したりするとヒータ温度が当初の予定温度(設
計温度)より高くなりオーバヒートすることにな
る。にも拘らず従来はヒータ温度は最も一般的な
使用条件に合わせて設計され、一旦その設計値に
セツトされたら運転条件に応じて制御するという
ことは行つていなかつた。 Most of these types of exhaust particulates are flammable, such as carbon particles, and diesel particulates collect these flammable particulates and incinerate them to regenerate the collection material. Various traps are known. An electric heater is generally used as a means for burning the collected particulate and regenerating the trap. That is, an electric heater is attached to the front end surface of the collection material, and the heater burns the exhaust particulates adhering to the surface of the collection material, which is used as a heat source to cause the downstream particulates to self-combust. However, none of the conventional particulate traps controls the temperature of the heater. in general,
In order to reliably ignite and burn the particulate, it is necessary to heat the heater to a high temperature of several hundred degrees, but this temperature condition naturally changes depending on the flow rate of exhaust gas passing through the trap or fluctuations in the battery voltage of the power supply. It is something that should be done. Otherwise, if the heater temperature is not controlled, if the exhaust gas flow rate decreases or the battery voltage increases, the heater temperature will become higher than the originally planned temperature (design temperature), resulting in overheating. However, in the past, the heater temperature was designed according to the most general usage conditions, and once it was set to the designed value, it was not controlled according to the operating conditions.
本考案は斯かる点に鑑み絶えず電気ヒータの温
度もしくはそれを代表する物理量を検出し、その
検出信号に基いてヒータが所定の温度に達したら
ヒータへの通電を停止するようにすることにより
ヒータの外的あるいは内的要因の変化に関係なく
ヒータの温度が設定値を越えないようにし、それ
によりヒータの過熱を防止し以つてヒータの溶損
や劣化を防止せんとするものである。 In view of this, the present invention constantly detects the temperature of the electric heater or a physical quantity representing it, and stops power supply to the heater when the heater reaches a predetermined temperature based on the detection signal. The purpose is to prevent the temperature of the heater from exceeding a set value regardless of changes in external or internal factors, thereby preventing overheating of the heater and thereby preventing melting and deterioration of the heater.
以下、図面に従つて本考案の好ましい実施例に
つき説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
第1図は本考案に係るパテイキユレートトラツ
プの全体構造を示すものでトラツプ容器1内には
捕集材(トラツプ材)3がある。この捕集材3と
しては、公知の発泡セラミツクおよびこれに類似
する材料を用いることができる。即ち、捕集材3
は三次元の網目構造で、その内部を排気ガスが流
通可能でありかつ排気ガスに含まれている排気微
粒子をその網目間に捕集することができるように
なつている。 FIG. 1 shows the overall structure of a particulate trap according to the present invention, and a trap container 1 has a collection material (trap material) 3 therein. As the collection material 3, known foamed ceramic or similar materials can be used. That is, the collection material 3
has a three-dimensional mesh structure, through which exhaust gas can flow, and exhaust particulates contained in the exhaust gas can be collected between the meshes.
トラツプ容器1はデイーゼルエンジンの排気管
2中に配置される。排気ガスは第1図に矢印方向
に流れるものとする。 A trap container 1 is placed in an exhaust pipe 2 of a diesel engine. It is assumed that the exhaust gas flows in the direction of the arrow in FIG.
トラツプ容器1の入口側(上流側)端部には必
要に応じて捕集材3に捕集された排気パテイキユ
レートを着火燃焼してトラツプを再生するための
電気ヒータ10が設けられる。 An electric heater 10 is provided at the inlet side (upstream side) end of the trap container 1, if necessary, for igniting and burning the exhaust particulates collected by the collection material 3 to regenerate the trap.
ヒータ10は例えば第2図に示す如くジグザグ
状に折り曲げた2本のヒータ線をトラツプ入口全
体に亘つて広がるように配設したものでよいがヒ
ータの形状種類はそれに何ら限定されず、例えば
多数の貫通孔を有する多孔円板状のセラミツクヒ
ータ、あるいはPTC(正特性サーミスタ)ヒータ
等でもよい。 The heater 10 may be, for example, as shown in FIG. 2, in which two heater wires bent in a zigzag pattern are arranged so as to extend over the entire trap entrance; however, the shape and type of the heater is not limited thereto; It may also be a porous disk-shaped ceramic heater having through-holes, a PTC (positive characteristic thermistor) heater, or the like.
ヒータへの通電時期、即ちトラツプの再生時期
は公知の如くエンジンの回転数、負荷、エンジン
水温、背圧等の種々の制御パタメータ信号Sに基
いて制御装置ECU(第2図)により適切に制御さ
れる。 As is well known, the timing of energizing the heater, that is, the timing of trap regeneration, is appropriately controlled by the control unit ECU (Fig. 2) based on various control parameter signals S such as engine speed, load, engine water temperature, back pressure, etc. be done.
ヒータ10は一般には捕集材3の前端面に接触
せしめられるが第1図の如く捕集材3の前端面か
ら僅かに離される場合もある。 The heater 10 is generally brought into contact with the front end surface of the collecting material 3, but may be slightly separated from the front end surface of the collecting material 3 as shown in FIG.
本考案によればヒータ10にはヒータ10の温
度を測定する検出子13が設けられる。検出子1
3は例えばヒータ10に直接とり付けた熱電対で
よい。熱電対は好ましくは排気ガス流に直接さら
されないようにトラツプ容器1に近接したヒータ
上に設けられる。これは排気ガス流の中心から遠
い程ヒータが排気ガス流によつて冷却されにくい
のでヒータの最高温度をひろい易いためである。
これとは別に例えばPTCヒータを用いる場合に
はヒータの温度変化が抵抗(電圧)変化として代
表されるのでヒータ自身が検出子を内蔵している
と見ることができる。検出子13からの信号は
ECUに送られそれに基いてスイツチ手段17が
オン、オフ制御される。スイツチ手段17はヒー
タ10と電源(バツテリ)15とを接続する配線
中に設けられる。スイツチ手段は例えば通常のリ
レースイツチでよい。このリレースイツチはヒー
タが再びT℃以下になつたらオンになりヒータに
通電を開始する。 According to the present invention, the heater 10 is provided with a detector 13 for measuring the temperature of the heater 10. Detector 1
3 may be a thermocouple attached directly to the heater 10, for example. The thermocouple is preferably mounted on a heater close to the trap vessel 1 so as not to be directly exposed to the exhaust gas stream. This is because the further away from the center of the exhaust gas flow the heater is less likely to be cooled down by the exhaust gas flow, making it easier to reach the maximum temperature of the heater.
Apart from this, for example, when a PTC heater is used, the temperature change of the heater is represented by a resistance (voltage) change, so the heater itself can be considered to have a built-in detector. The signal from the detector 13 is
The signal is sent to the ECU, and the switch means 17 is controlled to turn on and off based on the signal. The switch means 17 is provided in the wiring connecting the heater 10 and the power source (battery) 15. The switching means may be, for example, a conventional relay switch. This relay switch is turned on when the temperature of the heater becomes below T° C. again, and starts supplying current to the heater.
以上の如く構成することにより本考案によれば
ヒータ10が所定温度T℃(第3図)に達する
と、たとえ他の条件、即ち制御パラメータ信号S
がすべてヒータへの通電命令条件を満足していた
としてもヒータへの通電はスイツチ手段17によ
り強制的に停止せしめられる。斯くしてヒータの
過熱は有効に防止せしめられ当初の目的を達成す
ることができる。 With the above configuration, according to the present invention, when the heater 10 reaches the predetermined temperature T° C. (FIG. 3), the control parameter signal S
Even if all of the conditions for energizing the heaters are satisfied, the energization to the heaters is forcibly stopped by the switch means 17. In this way, overheating of the heater is effectively prevented and the original purpose can be achieved.
第1図は本考案に係る排気微粒子浄化装置の全
体構成を一部破断して示す側面図、第2図は本考
案に係るヒータへの通電時期制御回路を示す図、
第3図は第1図に示す制御回路の要部のフローチ
ヤート図。
1……トラツプ容器、2……排気管、3……捕
集材、10……ヒータ、13……検出子、17…
…スイツチ手段。
FIG. 1 is a partially cutaway side view showing the overall configuration of the exhaust particulate purification device according to the present invention, and FIG. 2 is a diagram showing a circuit for controlling the energization timing to the heater according to the present invention.
FIG. 3 is a flowchart of the main parts of the control circuit shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Trap container, 2... Exhaust pipe, 3... Collection material, 10... Heater, 13... Detector, 17...
…Switch means.
Claims (1)
気微粒子捕集材の入口側端部に電気ヒータを取付
けると共に該電気ヒータを電源に接続して捕集材
により捕集した排気微粒子を所定時に着火燃焼せ
しめるようにした排気微粒子浄化装置において、
上記電気ヒータの温度を検出する検出子を排気ガ
ス流の中心から離れたヒータの外周部近傍に設
け、かつ上記ヒータと電源とを該検出子からの信
号に基いてヒータへの通電をオン、オフ制御する
スイツチ手段により接続することを特徴とするデ
イーゼルエンジンの排気微粒子浄化装置。 An electric heater is attached to the inlet side end of the exhaust particulate collection material installed in the exhaust pipe of the diesel engine, and the electric heater is connected to a power source to ignite and burn the exhaust particulates collected by the collection material at a predetermined time. In an exhaust particulate purification device designed to
a detector for detecting the temperature of the electric heater is provided near the outer periphery of the heater away from the center of the exhaust gas flow, and the heater and the power source are turned on based on a signal from the detector; An exhaust particulate purification device for a diesel engine, characterized in that it is connected by a switch means for off-controlling.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18710482U JPS5991413U (en) | 1982-12-13 | 1982-12-13 | Diesel engine exhaust particulate purification device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18710482U JPS5991413U (en) | 1982-12-13 | 1982-12-13 | Diesel engine exhaust particulate purification device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5991413U JPS5991413U (en) | 1984-06-21 |
JPS645048Y2 true JPS645048Y2 (en) | 1989-02-08 |
Family
ID=30403960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18710482U Granted JPS5991413U (en) | 1982-12-13 | 1982-12-13 | Diesel engine exhaust particulate purification device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5991413U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101439720B1 (en) * | 2010-04-27 | 2014-09-12 | 가부시키가이샤 니프코 | Member fastening structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0614018Y2 (en) * | 1987-02-27 | 1994-04-13 | 日野自動車工業株式会社 | Exhaust gas filter regeneration device |
JP2568510Y2 (en) * | 1992-01-13 | 1998-04-15 | 日産ディーゼル工業株式会社 | Particulate trap filter regeneration device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5438733B2 (en) * | 1973-06-19 | 1979-11-22 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5438733U (en) * | 1977-08-22 | 1979-03-14 |
-
1982
- 1982-12-13 JP JP18710482U patent/JPS5991413U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5438733B2 (en) * | 1973-06-19 | 1979-11-22 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101439720B1 (en) * | 2010-04-27 | 2014-09-12 | 가부시키가이샤 니프코 | Member fastening structure |
Also Published As
Publication number | Publication date |
---|---|
JPS5991413U (en) | 1984-06-21 |
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