JPS5919517A - Regeneration of particle collector - Google Patents
Regeneration of particle collectorInfo
- Publication number
- JPS5919517A JPS5919517A JP57129263A JP12926382A JPS5919517A JP S5919517 A JPS5919517 A JP S5919517A JP 57129263 A JP57129263 A JP 57129263A JP 12926382 A JP12926382 A JP 12926382A JP S5919517 A JPS5919517 A JP S5919517A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- battery
- electric heater
- particle collector
- predetermined value
- 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.)
- Granted
Links
- 239000002245 particle Substances 0.000 title claims abstract description 35
- 238000011069 regeneration method Methods 0.000 title claims abstract description 9
- 230000008929 regeneration Effects 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 3
- 239000003779 heat-resistant material Substances 0.000 abstract description 3
- 241000220317 Rosa Species 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000003601 intercostal effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
- 238000001926 trapping method Methods 0.000 description 1
Landscapes
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は自動車等の車輌に用いられるγイーげルエンジ
ン用の粒子捕集器の再生方法に係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for regenerating a particle collector for a gamma engine used in vehicles such as automobiles.
ディーピルエンジンに於て、その耕気系に排気ガス中の
炭素粒子の如き可燃性粒子を捕捉してこれが人気中へ故
山されることを防止りる粒子捕集器を設りることは従来
から知られている。In the Deep Pill engine, it is necessary to install a particle collector in the tillage system to capture combustible particles such as carbon particles in the exhaust gas and prevent them from being disposed of in the air. It has been known for a long time.
粒子捕集器は耐熱性の捕集材をイラし、捕集した粒子（
捕集物）の串が増大するに従ってその捕集材が詰まり、
正常な＋Ｊｌ気ガス流れに対し支障を与えるようになる
。このため、正常な排気カス流れに対し支障を与えるこ
となく粒子捕集器か使用されるためには、粒子捕集器に
捕捉さ４１だ粒子が定期的にこれより除去され、粒子捕
集器の再生か行われる必要がある。The particle collector irritates the heat-resistant collection material and collects the collected particles (
As the skewer of collected material increases, the collecting material becomes clogged,
It becomes a hindrance to the normal +Jl gas flow. For this reason, in order for the particle collector to be used without interfering with the normal exhaust gas flow, the particles trapped in the particle collector must be periodically removed from the particle collector. regeneration needs to be done.
この粒子捕集器の再生を行う一つの方法どして、粒子捕
集器の捕集材の上流側端面部に電気式に一タを配設し、
この電気式ヒータに通電を行い、該電気式ヒータの発熱
により前記捕集材が捕集している捕集物を焼失灰化させ
る方法が知られている。One method for regenerating this particle collector is to electrically arrange a cap on the upstream end of the collecting material of the particle collector,
A method is known in which the electric heater is energized and the collected material collected by the collection material is incinerated and incinerated by the heat generated by the electric heater.
電気式ヒータに対する電力の供給は自動車等の車輌に於
ては、バラ１りにより行われ、この電気代ヒータの電ツ
ノ消費は相当大きいものにイ【る。このためバラブリの
電圧が定格電圧以下であったり、まＩこ相当低い時に粒
子捕集器の再生のために前記電気式ヒータに通電が行ね
１すると、バラブリの電ｎ゛が過剰に低下し、所謂バラ
ラリ［りの状態が生じる虞れがある。In vehicles such as automobiles, electric power is supplied to electric heaters individually, and the electric power consumption of this electric heater is quite large. Therefore, if the electric heater is turned on to regenerate the particle collector when the voltage of the valve is below the rated voltage or is considerably low, the voltage of the valve will drop excessively. , there is a risk that a so-called inconsistent state may occur.
本発明は、電気代ヒータの電諒（゛あるバラ１りの電圧
を検出し、該電組に応じて電気式ヒータの通電を制御し
、バラｊり上りをＭｉ来り−ることなく粒子捕集器の再
生を行）再生方法を提供１にとを目的としている。The present invention detects the voltage of a certain voltage heater, controls the energization of the electric heater according to the voltage, and eliminates particles without causing the voltage to rise. The purpose of the present invention is to provide a regeneration method (1) for regenerating the collector.
かかる目的は、本発明によれば、捕集月の上流側端面部
にバラｊりより電流を１１ξ給されて作動りる複数個の
電気代ヒータ素子が配設された粒子捕集器の再生方法に
しく、予め定められたＣＩ生時期が到来した時、前記バ
ラ）りの電圧を検出し、該電圧が第一〜の所定値とこれ
より大きい第二の所定１ホ１の間にある時には前記複数
個の電気式ヒータ素子の各々に順次分割通電し、前記電
圧が前記第二の所定値以上の時には前記複数個の電気式
ヒータ素子に一斉に通電を行うことを特徴どづる粒子捕
集器の再生方法によって達成さ４する。According to the present invention, such an object is to regenerate a particle collector in which a plurality of electric heater elements are arranged on the upstream end face of the collecting plate and are operated by being supplied with a current of 11ξ from each other. According to the method, when a predetermined CI generation time arrives, the varying voltage is detected, and the voltage is between a first predetermined value and a second predetermined value larger than the first predetermined value. The particle trapping method is characterized in that sometimes each of the plurality of electric heater elements is sequentially dividedly energized, and when the voltage is equal to or higher than the second predetermined value, the plurality of electric heater elements are energized all at once. This is achieved by the collector regeneration method.
バッテリ電圧が第一の所定値と第二の所定値の間にある
時には、例えば定格電圧より少し低い時には複数個の電
気式ヒータ素子の各々に順次分割通電が行われることに
よりバッテリの消費電力か小さく抑えら４］、バッテリ
上りの琵ｑが回避される。When the battery voltage is between the first predetermined value and the second predetermined value, for example, if it is slightly lower than the rated voltage, each of the plurality of electric heater elements is sequentially energized separately, thereby reducing the power consumption of the battery. By keeping it small, a dead battery can be avoided.
バラｊり電圧が第二の所定値以上の時には、例えば定格
電圧である時にはバラ７りの電力に余裕があるから複数
個の電気式ヒータ素子に一斉に通電が行われ、バラアリ
上りを（？３来づることなく、粒ｉ’ １ｌｌｉ集器の
再生が素早く行われる。When the uneven voltage is equal to or higher than the second predetermined value, for example, when the voltage is at the rated voltage, there is enough power for the uneven voltage, so multiple electric heater elements are energized at the same time to prevent the uneven rise (? The regeneration of the grain i' 1lli collector is carried out quickly without any problems.
以下に添ｆ勺の図を参照して本発明４実施例について詳
細に説明する。A fourth embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第１図は本発明による再生方法か実施される粒子捕集器
の一つの実施例を示づ？１′断面図、第２図は第１図の
線ＩＩ−ＩＩに沿う断面図、第３図は第１図及び第２図
←二示された粒子捕集器の）ｒルタ要素の上流側端面を
示Ｊ端面図である。これらの図に於て、１は粒子（ｉ１
１集器のケーシングを示している。ケーシング１（Ｊそ
の一端にす）気カス人［１２及び接続用フランジ部３を
有し、また他端に活気ガス出口４及び接続用フランジ部
５を右し、ｆイー１ルエンジンの１７１気通路の途中に
取（＝Ｊりられる。FIG. 1 shows one embodiment of a particle collector in which the regeneration method according to the invention is implemented. 1' is a sectional view, FIG. 2 is a sectional view along the line II--II in FIG. 1, and FIG. 3 is a cross-sectional view of FIGS. It is a J end view showing an end surface. In these figures, 1 is the particle (i1
The casing of one collector is shown. The casing 1 (at one end thereof) has a gas outlet 4 and a connecting flange part 3, and has a gas outlet 4 and a connecting flange part 5 at the other end, and has a gas outlet 4 and a connecting flange part 5 at the other end, and has a gas outlet 4 and a connecting flange part 5 at the other end, and has a gas outlet 4 and a connecting flange part 5 at the other end, and has a gas outlet 4 and a connecting flange part 5 at the other end, It is taken in the middle of the passage.
ケーシング′１は排気ガス入ＬＪ ２どＩＪＩ気カス出
Ｄ ／１どの間に粒子捕東祠（・ある］ｆルタ要素６を
収納している。このノｒル′Ｉ要素６は、ハニカム状セ
ラミックス等の耐熱月（よりｔ＋＋成され、この実施例
に於ては、楕円形断面をイ１しくいる３、）ｒルタ要索
６の」−流側端面には複′ｅ！！個の、この実施例に於
ては、８個の電気式じ−９素子８１・〜Ｅ’３ ｅが分
散配設されている。この８個の電気ｊ、（ヒータ素子の
うち電気式ヒータ索子８１と８２．８３と８４．８５と
８ａ、８１ど８ｏとは番々ノイルタ要素６の上流側端面
の中心を対称点としく各々対をなして対称配置６されて
おり、これら電気式ヒータ素子は各々イの一端にで個別
の接続端Ｔ９ ＋〜９Ｂに接続され、また他端にてアー
ス要素１゛０にＪｔ通にアースされている。電気式ヒー
タ素子８＋−□８８はフィルタ要素６どこれＪ、リ−に
流側（こ設りら４′）たハニカム状セラミックス製のフ
ィルタ要素７との間に挾まれで保持され（いる。The casing '1 houses a particle trap element 6 between the exhaust gas inlet LJ2 and the gas outlet D/1.This norl element 6 has a honeycomb shape. A heat-resistant material such as ceramics (made of T++, and in this embodiment, has an elliptical cross section) is made of a heat-resistant material such as , In this embodiment, eight electric heater elements 81 to E'3 e are distributed. 81, 82, 83, 84. are each connected at one end of A to an individual connection terminal T9+ to 9B, and at the other end are grounded to the ground element 1'0 through Jt.The electric heater elements 8+-□88 are connected to the filter element 6 Both of them are sandwiched and held between a filter element 7 made of honeycomb-shaped ceramics located on the downstream side (here 4').
電気式ヒータ素子３３！〜８８には第１図に示されてい
る如く、バッテリ１２より電流がスイッチ１１１・〜ｌ
ｉｅを経て各々個別に選択的に供給され、スイッチ１１
１〜１１８の開閉は制御装置１３により行４つれる。Electric heater element 33! As shown in FIG. 1, current flows from the battery 12 to switches 111.
ie and are selectively supplied to each individually via the switch 11.
The opening/closing of numbers 1 to 118 is controlled by the control device 13 in four rows.
制御装置１３は土ンジン回転数ピンナ１１によりディー
ゼルエンジンの回転数に関する情報とハラアリ電圧検出
手段１５によりバッｉ−リ１２の電１１に関づる情報と
を与えられ、エンジン回転数の槓ｌ？値が所定値以上に
達したどき粒子捕集器の再生時＋１１］ ’Ｕ’あると
判定し、この時のバラＩす１２の電圧に応じでスイッ升
１１１〜ｌｌ’ｅの開閉４り１５図に於て示され（いる
如き）Ｄ−’ｆ−１・−１〜（、二従って制御りるよう
になっている。The control device 13 is given information regarding the rotation speed of the diesel engine by the engine rotation speed pinner 11 and information regarding the electric power 11 of the battery 12 by the voltage detection means 15, and determines the engine rotation speed. When the value reaches a predetermined value or more, when the particle collector is regenerated +11], it is determined that 'U' is present, and the switches 111 to ll'e are opened and closed according to the voltage of the rose 12 at this time. As shown in the figure, D-'f-1.-1~(, 2) is controlled accordingly.
次に第５図に示された）］コーチャー１へを参照して本
発明による粒子捕集器の再生方法の実施要領について説
明Ｊる。先ずスデップ１に於ては、粒子捕集器の再生時
期であるか否かのｒ１１別か行わ１′する。粒子捕集器
の再生時期の決定は、この実施例に於ては、ディーゼル
エンジンの回転数の積紳舶により決定される。スアップ
１に於Ｃ再生時＋１１１てイ【い時にはスｙツ７０へ進
み、このスフ−ツブに於ては、スイッチ１１＋・−・１
′１Ｂの全くが聞かれた状態が維持され、電気式ヒータ
素ｒε３Ｉ へ−８８に対りる通電が行われない。Next, with reference to Coach 1 (shown in FIG. 5), the procedure for carrying out the method for regenerating a particle collector according to the present invention will be explained. First, in step 1, r11 is determined to determine whether it is time to regenerate the particle collector or not. In this embodiment, the determination of when to regenerate the particle collector is determined by the revolution speed of the diesel engine. When playing C in step 1, switch 11+ to 111, then go to system 70.
'1B is maintained in a state in which all signals are heard, and no current is applied to the electric heater element rε3I -88.
スープツブ′１に７ｉ９て粒子捕集器の１」生時明であ
る時にはスラップ２へ進み、このスラップに於ては、バ
ラｊす１２の電１土Ｖの読込みが行われる。When the particle collector 7i9 is active in the soup tube '1', the program advances to slap 2, and in this slap, the reading of 12 electricity 1 soil V is performed.
次にスラップ３１＼進み、このスラップに於Ｃは、バラ
７り電源Ｖが所定１１ｉ′ｆ△以七であるか、イｉかの
判別が行われる。例えば、バラ１す１２の定格電圧が１
２Ｖある場合、このスラップ３に於（は、ハラ７り電圧
ＶがＩＯＶ以上であるが占かの’Ｅ別が行われる。■さ
八でない時に番よ、即ｌうバラフリ電Ｌ１−が１０Ｖに
満たない１１．１にはスーツツブ５〕へ進み、バッテリ
上りの発生を回避りｌ＼くス、イップ１１＋・〜・１１
Ｂの全乙が開かれた状態が組積され、電気代に−タ素子
８１〜８８の仝Ｕ １．１通電が？ｊわれることがない
。Next, the program proceeds to slap 31\, and in this slap, it is determined whether the power source V is equal to or greater than a predetermined value 11i'f△ or ii. For example, the rated voltage of rose 1 and 12 is 1
If there is 2V, in this slap 3, the voltage V is higher than IOV, but the fortune-telling 'E' is performed. If it is less than 11.1, proceed to suit 5] to avoid battery drain, 11+...11
When all parts of B are stacked in an open state, the electricity bill will be increased by energizing the elements 81 to 88. I don't get hurt.
■≧△である時には、即Ｉうバラｊり電ｎ二が１０Ｖ以
」二である時に（よスラップ４へ進み、このスラップに
於Ｃは、バラｊり電圧Ｖか所定値△Ｊ、り人さい所定値
］３以ｌＣあるか否かの判別か行われる。■When ≧△, when the current voltage is 10V or more (proceed to slap 4, and at this slap, C is either the voltage V or the predetermined value △J, A determination is made as to whether or not there is a predetermined value of 3 or more.
この所定値Ｂはバッテリ１２の定格ミルに相当りる。This predetermined value B corresponds to the rated mil of the battery 12.
■≧１３でない時には、即らバラ−ｊり電１１か１０Ｖ
以上ではあるが定格電圧１２Ｖに１ ／、二ないＯＮに
はスーツツブ６へ進む。スラップ６に於ては、先４゛ス
、イッヂ１１貫が所定時間開じられ、該スインｆ１１１
が聞いた後に次にスインｆ−１１２が所定肋間閉じられ
、以下同様にスインｆ−１１３ヘ−１１８が順次所定１
１′ｉ間だり閉じられる。これにより、最初に電気式ヒ
ータ素子８１に所定時間通電が行われ、該電気式ヒータ
素子（３１に対りる通電が終了した後に電気式ヒータ素
子８２に所定時間通電が行われ、以下同様に８３〜８Ｂ
に所定時間のみ順次通電が行われる。即ち分割通電が行
われる。このように電気代ヒータ素子８１〜８８の各々
に順次分割通電が行われることにより粒子捕集器の再生
が行われる。この場合にはバラｊす１２の消費電力は一
つの電気式ヒータ素子の定格電力ひあるの（、比較的低
く、ハラ−ｊす」りが生じることがない。■If it is not ≧13, then the rose voltage is 11 or 10V.
Although this is the above, if the rated voltage is 1/2V or less, proceed to suit part 6. In slap 6, the first 4 steps and the 11th switch are opened for a predetermined time, and the swing f111
After hearing, the swing f-112 is then closed at a predetermined intercostal space, and similarly the swing f-113 to f-118 is sequentially closed at a predetermined interval.
It is closed for 1'i. As a result, first, the electric heater element 81 is energized for a predetermined time, and after the electric heater element 31 is energized, the electric heater element 82 is energized for a predetermined time, and the same goes for the following. 83-8B
energization is performed sequentially only for a predetermined period of time. That is, divided energization is performed. In this way, the particle collector is regenerated by sequentially dividing and energizing each of the electricity heater elements 81 to 88. In this case, the power consumption of the heater element 12 is relatively low compared to the rated power of one electric heater element, and no problem occurs.
！≧１３である峙には、即しハラ１す７５圧が定格電Ｉ
Ｊ−以１−である時に（よスラップ８へ進み、このスミ
ツブに於−ではスイッチ１′１１・−１１８の仝゛Ｃが
一斉に閉じられる。これにより゛電気式じ一夕素子８１
〜８８に一斉に通電が行われ、これによ・）で粒子捕集
器の再生が県甲く行われる。バッテリ１２のＴｉ汀が定
格電圧ｒある１１．′ｌ（Ｊはハラｊりの電力に余裕が
ある時であるので、この時にｆＪｌ Ｆ述の如く複数個
の全ての電気式ヒータ索子に一斉に通７ＦＮが打われて
もバラ７り上りか生じることがない。! If ≧13, then the rated voltage I is equal to 175 voltage.
When J- is 1- (proceeds to Slap 8, in which the switches 1'11 and -118 are closed all at once. As a result, the electrical switch element 81
-88 are energized all at once, and as a result, the particle collectors are regenerated completely. 11. The Ti layer of the battery 12 has a rated voltage r. 'l (J is a time when there is enough power to spare, so at this time fJl F Even if all the electric heater cables are hit with 7FN at the same time as described above, it will not turn up at 7. or never occur.
以上に於Ｃは本発明を９Ｊｆ定の実施例について訂細に
説明したが、本発明はこれら（、：限定されるものぐは
なく本発明の範囲内にて種々の実施例が可能であること
が当ｔｉにとって明らか（゛あろ゛う。Above, the present invention has been described in detail with reference to specific embodiments, but the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. This is obvious to me.
第１図は本発明による土ンジン用粒子捕集器の再生方法
の実施に使用する粒子ｌ１１ｉ！４ｊ器の一実施例を承
り半断面図、第２図は第１図の線ＩＩ−Ｉｆに沿う断面
図、第３図は第１図及び第２図に示され／こ粒子捕集器
のノイルタ要素の上流側端面を示づ端面図、第４図は第
１図乃至第３図に示された粒子捕集器の電気式ヒータ素
子に対づる通電を制御する制御装置の回路図、第５図は
本発明による零〇子捕集器の再生方法の実施要領を承り
フローチト−（へＣある。
１・・・ケーシング、２・・・抽気ガス入［１，３・・
・接続用フランジ部、４・・・υ１気ガス出ロ、５・・
・接続用７ランジ部、６．７・・・フィルタ要素、８＋
〜８１．・・・電気式ヒータ素子、９＋ 〜９８・・・
接続端子、１０・・・アース要素、１１ｉ〜１１Ｂ・・
・ス、イツ１．１２・・・バッテリ、１３・・・制ｆｆ
１ｉ置、１４・・・１ンジン回転数センザ、１５・・・
バラブリ電圧しンリ特 訂 出 願 人 ｈヨタ自
動車株式会社代 理 人 弁理士 明石
昌毅第１図
第３図
第２図FIG. 1 shows particles l11i! used in carrying out the method for regenerating a dirt particle collector according to the present invention! FIG. 2 is a sectional view taken along line II-If in FIG. 1, and FIG. 3 is a half-sectional view of an embodiment of the particle collector shown in FIGS. FIG. 4 is an end view showing the upstream end surface of the Noirta element; FIG. Figure 5 shows the procedure for regenerating a particle collector according to the present invention.
・Connection flange, 4...υ1 gas outlet, 5...
・7 langes for connection, 6.7...filter element, 8+
~81. ...Electric heater element, 9+ ~98...
Connection terminal, 10... Earth element, 11i to 11B...
・S、Itsu 1.12...Battery、13...Controlff
1i setting, 14...1 engine rotation speed sensor, 15...
Discrete Voltage Shinri Special Edition Applicant: Yota Jidosha Co., Ltd. Representative: Masatake Akashi, Patent Attorney Figure 1 Figure 3 Figure 2
Claims (1)
作ＦＩＪする複数個の電気式ヒータ素子が配設された粒
子捕集器の再生方法にしで、予め定められた再生時期が
到来した時、前記バラｊりの宵月を検出し、該電圧が第
一の所定ｆ１１′ｉとこ′４１より大きい第二の所定値
の間にある時には前記複数個の電気式ヒータ素子の各々
に順次分割通電し、前配電圧がｆｌａ記第二の所定値以
上の時（こ；工前記複数個の電気式ヒータ素子に一斉に
通電を行うことを特徴とする粒子捕集器の再生方法。In a method for regenerating a particle collector in which a plurality of electric heater elements are arranged to perform FIJ by supplying current from a dispersion to the upstream end face of the collection material, a predetermined regeneration time has arrived. When the uneven evening temperature is detected and the voltage is between the first predetermined value and a second predetermined value greater than the second predetermined value, the voltage is applied to each of the plurality of electric heater elements in turn. A method for regenerating a particle collector, characterized in that the plurality of electric heater elements are energized at the same time when the pre-distributed voltage is equal to or higher than the second predetermined value as specified in the second predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57129263A JPS5919517A (en) | 1982-07-23 | 1982-07-23 | Regeneration of particle collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57129263A JPS5919517A (en) | 1982-07-23 | 1982-07-23 | Regeneration of particle collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5919517A true JPS5919517A (en) | 1984-02-01 |
| JPH0330407B2 JPH0330407B2 (en) | 1991-04-30 |
Family
ID=15005243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57129263A Granted JPS5919517A (en) | 1982-07-23 | 1982-07-23 | Regeneration of particle collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919517A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6210531A (en) * | 1985-07-08 | 1987-01-19 | Matsushita Electric Ind Co Ltd | Ventilation device |
| US4881959A (en) * | 1987-07-20 | 1989-11-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Exhaust emission purifier for diesel engines |
-
1982
- 1982-07-23 JP JP57129263A patent/JPS5919517A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6210531A (en) * | 1985-07-08 | 1987-01-19 | Matsushita Electric Ind Co Ltd | Ventilation device |
| US4881959A (en) * | 1987-07-20 | 1989-11-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Exhaust emission purifier for diesel engines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0330407B2 (en) | 1991-04-30 |
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