JPH0741859Y2 - Exhaust gas purification device for internal combustion engine - Google Patents
Exhaust gas purification device for internal combustion engineInfo
- Publication number
- JPH0741859Y2 JPH0741859Y2 JP1990094000U JP9400090U JPH0741859Y2 JP H0741859 Y2 JPH0741859 Y2 JP H0741859Y2 JP 1990094000 U JP1990094000 U JP 1990094000U JP 9400090 U JP9400090 U JP 9400090U JP H0741859 Y2 JPH0741859 Y2 JP H0741859Y2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- electric heater
- exhaust
- internal combustion
- combustion engine
- 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 - Lifetime
Links
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は内燃機関の排気浄化装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an exhaust gas purification apparatus for an internal combustion engine.
〈従来の技術〉 内燃機関、特にディーゼルエンジンでは排気中にカーボ
ンを主とする排気微粒子が含まれているため、大気汚染
防止の観点から、前記排気微粒子を排気通路にてフィル
タにより捕集する技術の開発が進められている。また、
排気微粒子の補集量が増加すると、フィルタが目詰まり
して排気圧力が上昇しエンジン性能が低下するため、所
定時期にフィルタに捕集された排気微粒子を燃焼・除去
してフィルタの再生を図るようにしている。この種の排
気浄化装置の従来例として第４図に示すようなものがあ
る（実開平61−74616号公報、実願平１−27247号参
照）。<Prior Art> In an internal combustion engine, especially a diesel engine, since exhaust particles mainly containing carbon are contained in exhaust gas, a technology for collecting the exhaust particles by a filter in an exhaust passage from the viewpoint of preventing air pollution. Is being developed. Also,
When the amount of exhaust particulates collected increases, the filter becomes clogged, the exhaust pressure rises, and the engine performance deteriorates.Therefore, the exhaust particulates collected by the filter at a predetermined time are burned and removed to regenerate the filter. I am trying. As a conventional example of this type of exhaust emission control device, there is one as shown in FIG. 4 (see Japanese Utility Model Laid-Open No. 61-74616 and Japanese Patent Application No. 1-27247).
すなわち、ディーゼルエンジン１の排気通路２にはフィ
ルタ３が介装され、フィルタ３により排気中の排気微粒
子を捕集するようになっている。前記フィルタ３は、セ
ラミック等の多孔性部材からなるハニカム状の隔壁によ
り排気流と略平行なセルが多数形成され、各セルの出口
と入口とが交互に封鎖材により目封じされている。そし
て、排気が隔壁を介して隣接するセルに流入するときに
排気微粒子を隔壁にて捕集するようにしている。That is, the filter 3 is interposed in the exhaust passage 2 of the diesel engine 1, and the filter 3 collects the exhaust particulates in the exhaust. In the filter 3, a large number of cells that are substantially parallel to the exhaust flow are formed by honeycomb-shaped partition walls made of a porous material such as ceramic, and the outlets and inlets of the cells are alternately sealed by a blocking material. Then, when the exhaust gas flows into the adjacent cell through the partition wall, the exhaust particle is collected by the partition wall.
また、前記フィルタ３の外周部にはヒータ（図示せず）
が巻回され、このヒータにはコントローラ４から通電さ
れるようになっている。Further, a heater (not shown) is provided on the outer peripheral portion of the filter 3.
Is wound, and the heater is energized by the controller 4.
そして、フィルタ３に排気微粒子が所定量補集されたと
きに、ヒータに通電してフィルタ３を加熱して排気微粒
子を燃焼・除去しフィルタ３の再生を図るようにしてい
る。When a predetermined amount of exhaust particles are collected in the filter 3, the heater is energized to heat the filter 3 to burn and remove the exhaust particles to regenerate the filter 3.
〈考案が解決しようとする課題〉 しかしながら、このような従来の排気浄化装置において
は、フィルタ３の外周部にヒータを巻回してフィルタ３
を加熱するようにしているので、再生時にフィルタ３の
中央部温度が特に上昇してフィルタ３の上流側端部及び
下流側端部の温度と中央部の温度に大きな温度差が発生
し、フィルタ３にクラックが発生するという不具合があ
る。<Problems to be Solved by the Invention> However, in such a conventional exhaust emission control device, a heater is wound around the outer peripheral portion of the filter 3 to filter the filter 3.
Since the temperature of the central portion of the filter 3 is particularly increased during regeneration, a large temperature difference occurs between the temperature of the upstream end portion and the downstream end portion of the filter 3 and the central portion temperature. 3 has a problem that cracks occur.
本考案は、このような実状に鑑みてなされたもので、フ
ィルタの上流側端部及び下流側端部と中央部との温度差
を抑制してクラックの発生を防止できる排気浄化装置を
提供することを目的とする。The present invention has been made in view of such an actual situation, and provides an exhaust gas purification device capable of preventing the occurrence of cracks by suppressing the temperature difference between the upstream end portion and the downstream end portion of the filter and the central portion. The purpose is to
〈課題を解決するための手段〉 このため、本考案は、排気通路に介装されるフィルタの
外周を覆い前記フィルタと面接触する保持部材に電気ヒ
ータを埋込んで巻回すると共に、フィルタの上流側端部
及び下流側端部より上流側と下流側と夫々電気ヒータを
延設して配置し、フィルタ再生時に電気ヒータに通電手
段から通電するようにした。<Means for Solving the Problems> Therefore, according to the present invention, the electric heater is embedded in the holding member that covers the outer periphery of the filter provided in the exhaust passage and is in surface contact with the filter, and is wound. The electric heaters are arranged so as to extend from the upstream end and the downstream end, respectively, from the upstream end and the downstream end, and the electric heater is energized from the energizing means during filter regeneration.
〈作用〉 このようにして、フィルタの外周を覆い前記フィルタと
面接触する保持部材に埋込んで巻回された電気ヒータを
フィルタの上流側端部及び下流側端部より上流側及び下
流側に延設し、フィルタの上流側端部及び下流側端部の
温度を上昇させるようにした。<Operation> In this manner, the electric heater embedded in the holding member that covers the outer periphery of the filter and makes surface contact with the filter is wound around the upstream side and the downstream side of the upstream side end and the downstream side end of the filter. The filter was extended to raise the temperature of the upstream end and the downstream end of the filter.
〈実施例〉 以下に、本考案の一実施例を第１図〜第３図に基づいて
説明する。<Embodiment> An embodiment of the present invention will be described below with reference to FIGS.
第１図において、従来例と同様に形成されたフィルタ11
は排気通路12に介装されている。前記フィルタ11は中空
状の筒体13により支持され、筒体13の中空部にはフィル
タ11の外周部に巻回するように電気ヒータ14が設けられ
ている。前記電気ヒータ14の排気通路上流側はフィルタ
11の上流側端部より上流側にフィルタ11の全長lFの一割
だけ延設され、また電気ヒータ14の排気通路下流側はフ
ィルタ11の下流側端部より下流側にフィルタ11の全長lF
の一割だけ延設されている。In FIG. 1, a filter 11 formed similarly to the conventional example.
Is installed in the exhaust passage 12. The filter 11 is supported by a hollow cylindrical body 13, and an electric heater 14 is provided in the hollow portion of the cylindrical body 13 so as to be wound around the outer peripheral portion of the filter 11. A filter is provided on the upstream side of the exhaust passage of the electric heater 14.
The entire length l F of the filter 11 is extended upstream from the upstream end of the filter 11 by 10%, and the exhaust passage downstream side of the electric heater 14 is downstream of the downstream end of the filter 11 in the total length l of the filter 11. F
Only 10% is extended.
前記フィルタ11外周部の筒体13内には電気ヒータ保持部
材15が充填され、電気ヒータはフィルタと面接触して保
持されている。また、フィルタ13より上流側及び下流側
の筒体13内には断熱材16が夫々充填されている。An electric heater holding member 15 is filled in the cylindrical body 13 on the outer peripheral portion of the filter 11, and the electric heater is held in surface contact with the filter. A heat insulating material 16 is filled in each of the cylindrical bodies 13 on the upstream side and the downstream side of the filter 13.
前記電気ヒータ14近傍には温度センサ17が設けられ、フ
ィルタの通電を制御するための温度センサ17の検出信号
は通電手段としてのコントローラ（図示せず）に入力さ
れている。また、筒体13外周壁には電源端子18が取付け
られ、再生時にこの電源端子18を介して電気ヒータ14に
コントローラから通電するようになっている。A temperature sensor 17 is provided near the electric heater 14, and a detection signal of the temperature sensor 17 for controlling the energization of the filter is input to a controller (not shown) as an energizing means. A power supply terminal 18 is attached to the outer peripheral wall of the cylindrical body 13, and the electric heater 14 is energized from the controller via the power supply terminal 18 during reproduction.
かかる構成によれば、電気ヒータはフィルタに確実に保
持され、振動等で断線することを防止できる。また、電
気ヒータ14がフィルタ11の上流側端部及び下流側端部よ
り上流側及び下流側に所定量延設されているので、電気
ヒータ14に通電されるとフィルタ11の上流側端面及び下
流側端面が電気ヒータ14の延設部からの放射熱と、前記
電気ヒータ14の延設部の保持部材を介した伝導熱を受け
て第２図中実線示の如く従来例（第２図中破線示）より
温度上昇する。このため、フィルタ11の中央部と端部と
の温度差が第２図中実線示の如く、従来例のものより縮
小するので、フィルタ11のクラックの発生を防止でき
る。ここで、第２図中鎖線示は、フィルタ11の中央部温
度を従来例のものと同様になるように、電気ヒータへの
通電を高めるようにしたときの温度特性であり、このよ
うにすると再生時間の短縮化と再生効率の向上とを図れ
る。According to such a configuration, the electric heater is securely held by the filter, and it is possible to prevent disconnection due to vibration or the like. Further, since the electric heater 14 is extended by a predetermined amount upstream and downstream from the upstream end and the downstream end of the filter 11, when the electric heater 14 is energized, the upstream end face and the downstream end of the filter 11 The side end surface receives the radiant heat from the extended portion of the electric heater 14 and the conductive heat via the holding member of the extended portion of the electric heater 14, and as shown by the solid line in FIG. 2, a conventional example (in FIG. 2) The temperature rises from the broken line. Therefore, the temperature difference between the central portion and the end portion of the filter 11 becomes smaller than that of the conventional example as shown by the solid line in FIG. 2, so that the generation of cracks in the filter 11 can be prevented. Here, the chain line in FIG. 2 shows the temperature characteristics when the energization to the electric heater is increased so that the central temperature of the filter 11 becomes the same as that of the conventional example. The reproduction time can be shortened and the reproduction efficiency can be improved.
また、フィルタ11の全長lFと電気ヒータ14の全長lHとの
比（lH／lF）が大きくなるに従って、第３図に示すよう
に、フィルタ11の端面温度は上昇する。これに対し、電
気ヒータ14への投入電力Ｅとフィルタ11の昇温に寄与す
る電力EFとの比（EF/E）すなわち電力エネルギ効率は、
第３図に示すように、前記フィルタ11の全長と電気ヒー
タ14の全長との比が大きくなるに従って低下する。した
がって、電力を有効に使用すると共にフィルタ11の端面
温度を高める為には、フィルタ11及び電気ヒータ14の全
長の比を約1.2〜1.4の範囲に設定すれば、電力消費を節
減しつつクラックの発生を防止できる。Further, as the ratio (l H / l F ) of the total length l F of the filter 11 and the total length l H of the electric heater 14 increases, the end surface temperature of the filter 11 rises as shown in FIG. On the other hand, the ratio (E F / E) of the input power E to the electric heater 14 and the power E F that contributes to the temperature rise of the filter 11, that is, the power energy efficiency is
As shown in FIG. 3, it decreases as the ratio of the total length of the filter 11 and the total length of the electric heater 14 increases. Therefore, in order to effectively use the electric power and increase the end surface temperature of the filter 11, if the ratio of the total lengths of the filter 11 and the electric heater 14 is set in the range of about 1.2 to 1.4, the power consumption is reduced and cracks are generated. Occurrence can be prevented.
〈考案の効果〉 本考案は、以上説明したように、フィルタの外周部に面
接触する保持部材に埋込んで巻回される電気ヒータを、
フィルタの上流側端部及び下流側端部よりも上流側及び
下流側に延設するようにしたので、フィルタを電気ヒー
タからの放射熱と保持部材を介しての伝導熱により加熱
すると同時に、電気ヒータが振動などで断線することを
防止でき、また、フィルタの中央部を端部との温度差を
縮小できるため、クラックの発生を防止できると共に、
再生時間の短縮化及び再生効率の向上を図れる。<Effects of the Invention> As described above, the present invention includes an electric heater embedded in a holding member that is in surface contact with the outer peripheral portion of a filter and wound around it.
Since it is arranged to extend upstream and downstream of the upstream and downstream ends of the filter, the filter is heated by the radiant heat from the electric heater and the conductive heat through the holding member, and at the same time, the electric It is possible to prevent the heater from breaking due to vibrations, etc. Also, because the temperature difference between the center part of the filter and the end part can be reduced, it is possible to prevent the occurrence of cracks,
The reproduction time can be shortened and the reproduction efficiency can be improved.
第１図は本考案の一実施例を示す構成図、第２図〜第３
図は同上の作用を説明するための図、第４図は排気浄化
装置の従来例を示す構成図である。 11…フィルタ、12…排気通路、14…電気ヒータFIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS.
FIG. 4 is a diagram for explaining the operation of the above, and FIG. 4 is a configuration diagram showing a conventional example of an exhaust emission control device. 11 ... Filter, 12 ... Exhaust passage, 14 ... Electric heater
Claims (1)
路に介装するようにした内燃機関の排気浄化装置におい
て、前記フィルタの外周を覆い面接触する保持部材に電
気ヒータを埋込んで巻回すると共に、フィルタの上流側
端部及び下流側端部より上流側と下流側とに夫々電気ヒ
ータを延設して配置し、フィルタ再生時に電気ヒータに
通電手段から通電するようにしたことを特徴とする内燃
機関の排気浄化装置。1. An exhaust gas purifying apparatus for an internal combustion engine, wherein a filter for collecting exhaust particulates is provided in an exhaust passage, and an electric heater is embedded in a holding member that covers the outer periphery of the filter and is in surface contact with the filter. In addition to turning, the electric heaters are respectively extended and arranged on the upstream side and the downstream side of the upstream end portion and the downstream end portion of the filter, and the electric heater is energized from the energizing means during filter regeneration. An exhaust purification device for an internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990094000U JPH0741859Y2 (en) | 1990-09-10 | 1990-09-10 | Exhaust gas purification device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990094000U JPH0741859Y2 (en) | 1990-09-10 | 1990-09-10 | Exhaust gas purification device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452524U JPH0452524U (en) | 1992-05-06 |
| JPH0741859Y2 true JPH0741859Y2 (en) | 1995-09-27 |
Family
ID=31831608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990094000U Expired - Lifetime JPH0741859Y2 (en) | 1990-09-10 | 1990-09-10 | Exhaust gas purification device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741859Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3017225U (en) * | 1994-12-22 | 1995-10-24 | 株式会社二和技研 | Scissors with squeezing roller |
-
1990
- 1990-09-10 JP JP1990094000U patent/JPH0741859Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0452524U (en) | 1992-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2707049B2 (en) | Diesel particulate filter | |
| US4512786A (en) | Exhaust gas purifying device | |
| JPH04179818A (en) | Exhaust gas fine particles purifing device | |
| JP2590943Y2 (en) | Exhaust gas purification device | |
| JPH10121941A (en) | Exhaust emission control device | |
| JPH0741859Y2 (en) | Exhaust gas purification device for internal combustion engine | |
| JPH0115684B2 (en) | ||
| JP2888028B2 (en) | Diesel engine exhaust purification system | |
| JPH03294614A (en) | Exhaust emission purifier | |
| JPH0122449B2 (en) | ||
| JPH0634570Y2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP2516113Y2 (en) | Exhaust gas aftertreatment device | |
| JPH08100630A (en) | Spherical electric conductor charging type particulate collecting filter | |
| JPH0121127Y2 (en) | ||
| JPH11236813A (en) | Regeneration system for exhaust gas purifying device | |
| JP3201114B2 (en) | Exhaust particulate filter for internal combustion engine | |
| JP3401946B2 (en) | Exhaust particulate processing equipment for internal combustion engines | |
| JP2560293Y2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP3064322B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP3360437B2 (en) | Exhaust particulate processing equipment for internal combustion engines | |
| JP3111828B2 (en) | Exhaust particulate processing equipment for internal combustion engines | |
| JPS58214316A (en) | Filter for purifying exhaust gas | |
| JPH0352973Y2 (en) | ||
| JP4363074B2 (en) | Exhaust gas purification system | |
| JP3826661B2 (en) | Diesel particulate filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |