JPH0526005B2 - - Google Patents
Info
- Publication number
- JPH0526005B2 JPH0526005B2 JP6373683A JP6373683A JPH0526005B2 JP H0526005 B2 JPH0526005 B2 JP H0526005B2 JP 6373683 A JP6373683 A JP 6373683A JP 6373683 A JP6373683 A JP 6373683A JP H0526005 B2 JPH0526005 B2 JP H0526005B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- heater element
- diesel engine
- solid particles
- exhaust 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.)
- Expired - Lifetime
Links
- 239000002245 particle Substances 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims 2
- 238000013459 approach Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000953 kanthal Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F01N3/027—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
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)
Description
【発明の詳細な説明】
技術分野
本発明はデイーゼルエンジンの排気ガスの浄化
に係り、より詳しくは、デイーゼルエンジン排気
ガスに含まれる黒煙粒子のような固形粒子を捕集
するための捕集器に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to the purification of diesel engine exhaust gas, and more particularly, to a collector for collecting solid particles such as black smoke particles contained in diesel engine exhaust gas. Regarding.
背景技術
デイーゼルエンジン排気ガスに含まれる固形粒
子（排気黒煙の粒子など）を捕集するためセラミ
ツク等の多孔質フイルタを用いた捕集装置が知ら
れている。第１図を参照して従来の捕集装置を説
明するに、１０はデイーゼルエンジン、１２は排
気マニホルド、１４，１６は排気管、１８は捕集
器である。捕集器１８のハウジング２０内にはた
とえば三次元網目構造を持つた多孔質セラミツク
から成るモノリス状のフイルタ２２が収蔵してあ
り、排気ガス中の固形粒子を主として衝突捕集の
原理により捕集し得るようになつている。装置の
使用に伴い捕集された粒子がフイルタ内に蓄積す
るとフイルタの目詰りにより通気抵抗が増大する
ので、フイルタは適当な時期にまたは定期的に再
生しなければならない。このため、フイルタ２２
の上流側端部に接触させまたは近接して固形粒子
点火用の電熱ヒータ２４（第１図には模式的に示
してある）を設け、制御回路２６により適当な時
期にリレー等から成る断続器２８を閉成して一定
時間電熱ヒータ２４に通電してこれを加熱するこ
とにより、フイルタに捕集された固形粒子に着火
させ、固形粒子の主成分であるカーボンを燃焼さ
せてフイルタを再生している。BACKGROUND ART A collection device using a porous filter made of ceramic or the like is known for collecting solid particles (exhaust black smoke particles, etc.) contained in diesel engine exhaust gas. A conventional collection device will be described with reference to FIG. 1. 10 is a diesel engine, 12 is an exhaust manifold, 14 and 16 are exhaust pipes, and 18 is a collector. A monolithic filter 22 made of, for example, porous ceramic with a three-dimensional network structure is housed in the housing 20 of the collector 18, and collects solid particles in the exhaust gas mainly by the principle of collision collection. It is becoming possible to do so. As particles collected during use of the device accumulate in the filter, the filter becomes clogged and airflow resistance increases, so the filter must be regenerated at appropriate times or periodically. For this reason, the filter 22
An electric heater 24 (schematically shown in FIG. 1) for igniting solid particles is provided in contact with or in close proximity to the upstream end of 28 is closed and electricity is supplied to the electric heater 24 for a certain period of time to heat it, the solid particles collected by the filter are ignited, the carbon that is the main component of the solid particles is burned, and the filter is regenerated. ing.
第２図は第１図の−矢視拡大断面図で、従
来の電熱ヒータの一例の一部分を示したものであ
る。電熱ヒータ２４は例えば捕集器ハウジング２
０の断面を二以上（第２図の例では６つ）のセク
ターに分け、各セクターに１個のヒータエレメン
ト３０を配置して構成される。ヒータエレメント
３０はニクロム線、カンタル線、または炭化珪素
系の発熱用抵抗材料の線材から成り、硝子等で出
来た一対の絶縁性支持部材３２，３４に保持さ
れ、その一端３６は断続器（第１図）を介してバ
ツテリに接続されその他端３８は接地された金属
製の硝子押え４０に接続されている。 FIG. 2 is an enlarged sectional view taken along the - arrow in FIG. 1, showing a portion of an example of a conventional electric heater. The electric heater 24 is, for example, the collector housing 2
The cross section of 0 is divided into two or more sectors (six in the example shown in FIG. 2), and one heater element 30 is arranged in each sector. The heater element 30 is made of a wire made of a nichrome wire, a Kanthal wire, or a silicon carbide-based heating resistance material, and is held by a pair of insulating support members 32 and 34 made of glass or the like, and one end 36 of the heater element 1), and the other end 38 is connected to a grounded metal glass presser 40.
各ヒータエレメント３０の平面形状は第２図に
視るようにセクターの両辺を画定する支持部材３
２，３４間で蛇行する如くなつている。しかし
て、従来の捕集器では、第３図に示したようにヒ
ータエレメント３０はフイルタ２２の端面に平行
な同一平面内で延長しているため、通電により発
熱し高温になると熱膨張を起こし自ら変形する。
この変形の方向はフイルタ端面に対してランダム
であるから、変形によりヒータエレメントが浮上
つてフイルタから離れ、固形粒子の着火性が損な
われるという問題があつた。 The planar shape of each heater element 30 is as shown in FIG.
It seems to meander between 2 and 34. However, in the conventional collector, as shown in FIG. 3, the heater element 30 extends in the same plane parallel to the end surface of the filter 22, so when it generates heat due to electricity and reaches a high temperature, it causes thermal expansion. It transforms itself.
Since the direction of this deformation is random with respect to the end face of the filter, there is a problem that the heater element floats up and separates from the filter due to the deformation, impairing the ignitability of the solid particles.
発明の開示
本発明は従来技術の叙上の問題点に鑑み案出さ
れたもので、フイルタ再生に当たり捕集固形粒子
に確実に且つ安定して着火させ得るような捕集器
を提供することを目的とするものである。DISCLOSURE OF THE INVENTION The present invention was devised in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a collector that can reliably and stably ignite collected solid particles during filter regeneration. This is the purpose.
上記目的を達成するため、本発明は、ヒータエ
レメントの熱膨張による変形を利用してヒータエ
レメントとフイルタとの接触を確保しようという
もので、このため、ヒータエレメントの側面形状
は、少なくとも非通電状態において、該ヒータエ
レメントのうち絶縁性支持部材間に延びる部分が
絶縁性支持部材に支持される部分よりも、フイル
タ端部に対して間〓を有してフイルタ側に変位す
るようになつていることを特徴とするものであ
る。このような配置・形状にすれば、非通電時に
は、エンジン振動に伴うフイルタとヒータエレメ
ントとの接触摩耗を少なくでき、通電加熱された
時には、ヒータエレメントは熱膨張によりフイル
タ端部により接近するため固形粒子への着火性が
向上する。 In order to achieve the above object, the present invention aims to ensure contact between the heater element and the filter by utilizing deformation due to thermal expansion of the heater element. In the heater element, the portion extending between the insulating support members is displaced toward the filter side with a distance from the end of the filter, compared to the portion supported by the insulating support members. It is characterized by this. With this arrangement and shape, it is possible to reduce contact wear between the filter and the heater element due to engine vibration when the power is not energized, and when the heater element is energized and heated, the heater element moves closer to the end of the filter due to thermal expansion, so it becomes solid. The ignitability of particles is improved.
実施例
第４図を参照して本発明の実施例を説明する。
第４図は、第３図同様、第２図の−線に沿つ
たヒータエレメントの側面図である。本発明の捕
集器はヒータエレメントの側面形状において従来
の捕集器と異なるのみであり、他の構成は第１図
および第２図に例示した従来のものと基本的に異
なるところがない。よつて相違点のみを説明す
る。Embodiment An embodiment of the present invention will be described with reference to FIG.
Like FIG. 3, FIG. 4 is a side view of the heater element taken along the - line in FIG. 2. The collector of the present invention differs from the conventional collector only in the side shape of the heater element, and other configurations are basically the same as the conventional collector illustrated in FIGS. 1 and 2. Therefore, only the differences will be explained.
この実施例では、ヒータエレメント３０はニク
ロム線から成り、その側面形状においてこのヒー
タエレメントはプレス加工等によりフイルタ２２
の側に弯曲している。このため、ヒータエレメン
ト３０のうち支持部材３２，３４間にある中間部
分４２は支持部材３２，３４の溝４４，４６に
夫々嵌合された側方部分４８，５０に比してフイ
ルタ側に突出している。プレス加工により折曲げ
部が縮径して溶断しやすくなるのを防ぐため、折
曲げ部分には適当なアールを持たせるのが好まし
い。 In this embodiment, the heater element 30 is made of nichrome wire, and in its side shape, the heater element 30 is formed by press working or the like to form the filter 22.
It is curved to the side. Therefore, the intermediate portion 42 of the heater element 30 located between the support members 32 and 34 protrudes toward the filter side compared to the side portions 48 and 50 that are fitted into the grooves 44 and 46 of the support members 32 and 34, respectively. ing. In order to prevent the bent portion from shrinking in diameter due to press working and becoming susceptible to fusing, it is preferable to provide the bent portion with an appropriate radius.
通電により発熱するに伴いヒータエレメントは
フイルタ方向のみに熱膨張し、その中間部分４２
はフイルタ２２の端面に接近あるいは密着する。
通電しない時は発熱しないのでヒータエレメント
は元の位置に戻り、ヒータエレメントとフイルタ
との間に間〓ができるため、ヒータエレメントの
摩耗が防止される。 As the heater element generates heat due to energization, the heater element thermally expands only in the direction of the filter, and the intermediate portion 42
comes close to or in close contact with the end face of the filter 22.
Since no heat is generated when electricity is not applied, the heater element returns to its original position, creating a gap between the heater element and the filter, thereby preventing wear on the heater element.
なお、本発明は前記実施例に限定されるもので
はなく、ヒータエレメントの数ならびに平面形状
は適宜変更することができる。また、ヒータエレ
メントは金属系または非金属系の種々の発熱用抵
抗材料で形成することができる。 Note that the present invention is not limited to the above embodiments, and the number and planar shape of the heater elements can be changed as appropriate. Further, the heater element can be formed of various metal-based or non-metal-based heat generating resistance materials.
発明の効果
以上から明らかなように、本発明は、ヒータエ
レメントのうち絶縁性支持部材間に延びる部分が
絶縁性支持部材に支持される部分よりもフイルタ
側に変位するような形状にヒータエレメントを成
形し、熱膨張によりヒータエレメントがフイルタ
に密着し得るようにしたから、フイルタ再生時に
捕集固形粒子に確実かつ安定して着火させること
ができる。また、ヒータエレメントの非通電状態
では、絶縁性支持部材間に延びるヒータエレメン
ト部分は、フイルタ端部に対して間〓を有して配
置されるため、エンジン振動によるヒータエレメ
ントやフイルタの接触摩耗が防止される。また、
本発明の捕集器は従来装置のヒータエレメントを
プレス加工等により塑性変形させるだけで極めて
簡単に得ることができる。Effects of the Invention As is clear from the above, the present invention provides a heater element in such a shape that the portion of the heater element extending between the insulating support members is displaced toward the filter side relative to the portion supported by the insulating support members. Since the heater element is shaped so that it can be brought into close contact with the filter by thermal expansion, the collected solid particles can be reliably and stably ignited when the filter is regenerated. In addition, when the heater element is not energized, the heater element portion extending between the insulating support members is placed with a gap from the end of the filter, so contact wear of the heater element and filter due to engine vibration is avoided. Prevented. Also,
The collector of the present invention can be obtained extremely easily by simply plastically deforming the heater element of the conventional device by press working or the like.
第１図は従来の捕集装置の模式図、第２図は第
１図の−矢視拡大断面図、第３図は第２図の
−矢視断面図、第４図は第３図同様の側面図
で本発明の捕集器のヒータエレメントの側面形状
を図解したものである。
１０……デイーゼルエンジン、１８……捕集
器、２０……捕集器ハウジング、２２……フイル
タ、２４……電熱ヒータ、３０……ヒータエレメ
ント、３２，３４……絶縁性支持部材、４０……
硝子押え、４２……ヒータエレメント中間部分、
４８，５０……ヒータエレメント側方部分。
Fig. 1 is a schematic diagram of a conventional collection device, Fig. 2 is an enlarged sectional view taken in the - arrow direction of Fig. 1, Fig. 3 is a sectional view taken in the - arrow direction of Fig. 2, and Fig. 4 is the same as Fig. 3. 2 is a side view illustrating the side shape of the heater element of the collector of the present invention. DESCRIPTION OF SYMBOLS 10... Diesel engine, 18... Collector, 20... Collector housing, 22... Filter, 24... Electric heater, 30... Heater element, 32, 34... Insulating support member, 40... …
Glass presser, 42... middle part of heater element,
48, 50...Heater element side portion.
Claims (1)
集器ハウジング内にデイーゼルエンジン排気ガス
中の固形粒子を捕集するための耐熱性フイルタを
収容し、該フイルタに捕集された固形粒子に所定
時期に点火してフイルタを再生するための発熱用
抵抗材料から成る少なくとも１つの線状のヒータ
エレメントをフイルタの端部に近接して絶縁性保
持部材間に支持して成る、フイルタ再生式のデイ
ーゼルエンジン排気ガス固形粒子捕集器であつ
て、 前記ヒータエレメントは、少なくとも非通電状
態において、ヒータエレメントのうち絶縁性支持
部材間に延びる部分が絶縁性支持部材に支持され
る部分よりも、フイルタ端部に対して間〓を有し
てフイルタ側に変位するような形状に成形され、
ヒータエレメント通電状態においてヒータエレメ
ント非通電状態よりもヒータエレメント自体の熱
膨張によりフイルタ端部に接近することを特徴と
するデイーゼルエンジン排気ガス固形粒子捕集
器。[Claims] 1. A heat-resistant filter for collecting solid particles in the diesel engine exhaust gas is housed in a collector housing connected to the exhaust system of the diesel engine, and the solid particles collected by the filter are A filter comprising at least one linear heater element made of a heat-generating resistive material for regenerating the filter by igniting solid particles at a predetermined timing and supported between insulating holding members in the vicinity of an end of the filter. A regenerative diesel engine exhaust gas solid particle collector, wherein the heater element is arranged such that, at least in a non-energized state, a portion of the heater element extending between the insulating support members is smaller than a portion supported by the insulating support members. is also formed into a shape that is displaced toward the filter side with a gap from the end of the filter,
A diesel engine exhaust gas solid particle collector characterized in that when the heater element is energized, the heater element approaches the end of the filter due to thermal expansion of the heater element itself than when the heater element is not energized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58063736A JPS59190418A (en) | 1983-04-13 | 1983-04-13 | Exhaust-gas solid particle collector for diesel-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58063736A JPS59190418A (en) | 1983-04-13 | 1983-04-13 | Exhaust-gas solid particle collector for diesel-engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59190418A JPS59190418A (en) | 1984-10-29 |
| JPH0526005B2 true JPH0526005B2 (en) | 1993-04-14 |
Family
ID=13237984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58063736A Granted JPS59190418A (en) | 1983-04-13 | 1983-04-13 | Exhaust-gas solid particle collector for diesel-engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59190418A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57179316A (en) * | 1981-04-28 | 1982-11-04 | Nippon Soken Inc | Particulate catcher with electric heating unit |
| JPS5937224A (en) * | 1982-08-24 | 1984-02-29 | Ngk Spark Plug Co Ltd | Filtering device for removing inflammable fine particle |
-
1983
- 1983-04-13 JP JP58063736A patent/JPS59190418A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57179316A (en) * | 1981-04-28 | 1982-11-04 | Nippon Soken Inc | Particulate catcher with electric heating unit |
| JPS5937224A (en) * | 1982-08-24 | 1984-02-29 | Ngk Spark Plug Co Ltd | Filtering device for removing inflammable fine particle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59190418A (en) | 1984-10-29 |
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