JPH04504603A - Diesel soot filter with auxiliary equipment for reducing nitrogen oxides and/or oxidizing carbon monoxide - Google Patents

Diesel soot filter with auxiliary equipment for reducing nitrogen oxides and/or oxidizing carbon monoxide

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Publication number
JPH04504603A
JPH04504603A JP50411789A JP50411789A JPH04504603A JP H04504603 A JPH04504603 A JP H04504603A JP 50411789 A JP50411789 A JP 50411789A JP 50411789 A JP50411789 A JP 50411789A JP H04504603 A JPH04504603 A JP H04504603A
Authority
JP
Japan
Prior art keywords
honeycomb body
soot filter
diesel soot
exhaust gas
filter according
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.)
Pending
Application number
JP50411789A
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Japanese (ja)
Inventor
ブロイエル、ハンス―ユルゲン
ブリユツク、ロルフ
Original Assignee
エミテツク　ゲゼルシヤフト　フユア　エミツシオンス　テクノロギー　ミツト　ベシユレンクテル　ハフツング
Priority date (The priority date 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 date listed.)
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Application filed by エミテツク　ゲゼルシヤフト　フユア　エミツシオンス　テクノロギー　ミツト　ベシユレンクテル　ハフツング filed Critical エミテツク　ゲゼルシヤフト　フユア　エミツシオンス　テクノロギー　ミツト　ベシユレンクテル　ハフツング
Publication of JPH04504603A publication Critical patent/JPH04504603A/en
Pending legal-status Critical Current

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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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/306—Preheating additional air
    • 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • 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
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/02—Exhaust filters
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Ceramic Engineering (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 窒素酸化物を還元し及び／又は−酸化炭素を酸化する補助装置を有するディーゼ ル煤用フィルタ本発明はディーゼル煤層フィルタ、すなわち燃料の不完全燃焼に より排ガス中に含まれて連行されまた大気及びそれと共に呼吸気中に達した際に 、健康を損なう作用ををする煤粒子を保留するのに適した、自動点火内燃機関の 排ガスダクト内の装置に関する。多くの場合セラミック材料から製造されている ハニカム体のフィルタを用いることにより煤の排出量を約２／３に低下させるこ とは可能である。＠止された煤粒子は比較的短時間でハニカム体中の溝を埋め、 その結果次ぎに生しる圧力損失により機関の性能は低下するか又は出力が変わら ない場合には燃料消費量が問題になるほど高くなる。従ってフィルタ内に蓄積さ れた煤粒子は一定の時間間隔で酸化することにより、すなわち燃焼により再び除 去しなければならない、この場合煤の点火温度は通常得られる排ガス温度以上の ５４０℃の範囲にあり、従ってこの温度を得るためには補助的な熱供給が必要で ある。この目的で提案された装置に関する概要（例えば燃料で運転されるバーナ による加熱又は王！＃から給電される電熱器による加熱）は、１９８５年２月２ ５日〜３月１日に催された米国デトロイトでの博覧会における国際会議で行われ た講演に基づくラオその他による論文「熱的及び触媒的ディーゼル粒子捕集再生 のための応用技術」　（ニスニーイー・テクニカル・ベーパー・シリーズに掲載 ）から明かである。これによれば安全上及び処理上の見地からは電熱が好ましい が、機関自体によって駆動される発電機による発電は効率が悪いことから無視し 得ない燃料の浪費を伴うことになる。触媒作用物質を燃料に添加することによっ て煤の点火温度を下げ得る場合には、必要とされる線条電力を」＝記の提案に基 づいて下げることができる。ドイツ連邦共和国特許出願公開第３７１１１０１号 明細書から、この点火温度を得るために必要な熱の供給を、必然的に排ガス中に 含まれる他の物質例えば−酸化炭素及び炭化水素の酸化から獲得する方法が公知 である。この酸化は、ガソリン機関の排ガス中の有害物質分を還元するのにも使 用されているような、上記形式の例えば白金被覆を備えたハニカム体の表面で触 媒的に行われる。上記の文献には、酸化に必要な酸素を提供するために吹き込ま れだ掃気を、排ガスと熱交換させることにより余熱することも記載されている。[Detailed description of the invention] Diesel with auxiliary equipment for reducing nitrogen oxides and/or oxidizing carbon oxides Diesel Soot Filter This invention is a diesel soot layer filter, that is, for incomplete combustion of fuel. When it is entrained in exhaust gas and reaches the atmosphere and breathing air with it, , for automatic ignition internal combustion engines, suitable for retaining soot particles that have harmful effects on health. Concerning equipment in exhaust gas ducts. often manufactured from ceramic materials By using a honeycomb filter, the amount of soot emitted can be reduced by about 2/3. is possible. @The stopped soot particles fill the grooves in the honeycomb body in a relatively short time, As a result, the resulting pressure loss may reduce engine performance or change output. Without it, fuel consumption becomes problematically high. Therefore, it is accumulated in the filter. The soot particles removed are removed again by oxidation at regular intervals, that is, by combustion. In this case, the ignition temperature of the soot must be higher than the normally available exhaust gas temperature. in the range of 540°C, therefore supplementary heat supply is required to obtain this temperature. be. An overview of devices proposed for this purpose (e.g. burners operated on fuel) Heating or king! Heating by an electric heater supplied with power from It was held at an international conference at the Expo in Detroit, USA, held from the 5th to March 1st. The paper “Thermal and Catalytic Diesel Particle Collection and Regeneration” by Rao et al. "Applied technology for ), it is clear. According to this, electric heating is preferable from the viewpoint of safety and processing. However, power generation by a generator driven by the engine itself is inefficient and should be ignored. This will involve wasting unprofitable fuel. By adding catalytic substances to the fuel If the ignition temperature of soot can be lowered by It can be lowered accordingly. Federal Republic of Germany Patent Application No. 3711101 From the specifications, it is clear that the supply of heat necessary to obtain this ignition temperature is necessarily in the exhaust gas. Other substances involved, such as carbon oxides and methods of obtaining them from the oxidation of hydrocarbons, are known. It is. This oxidation is also used to reduce harmful substances in the exhaust gas of gasoline engines. Touch the surface of a honeycomb body of the above type, for example with a platinum coating, as used in It is done mediated. In the above literature, blowing is used to provide the oxygen necessary for oxidation. It is also described that the scavenging air is preheated by exchanging heat with the exhaust gas.

本発明の課題は、保留された煤粒子を場合によっては断続的に、ディーゼル機関 が部分負荷でのみ運転される場合（この場合排ガス温度は一般に煤の点火温度以 下である）にも酸化する、上記形式のディーゼル煤層フィルタを得ることにある 。これは欧州特許出願公開第００７７５２４号明細書から公知の提案に基づき排 ガス温度が触媒法（例えばフィルタの相応する有効表面と接触することによって ）で３５０℃前後の温度に下げられている場合にもいえる。場合によっては必要 になる補助加熱器用のエネルギー必要量は最少化されるべきであり、また種々異 なる化学的プロセスの進行を助成するのに特に適しているフィルタ形状が提案さ れるべきである。The object of the present invention is to remove retained soot particles, in some cases intermittently, from a diesel engine. is operated only at part load (in which case the exhaust gas temperature is generally below the ignition temperature of the soot). The objective is to obtain a diesel soot layer filter of the above type that also oxidizes (below). . This is excluded based on the proposal known from European Patent Application No. 0077524. The gas temperature can be adjusted in a catalytic manner (e.g. by contacting the corresponding active surface of the filter). ) and the temperature is lowered to around 350°C. necessary in some cases The energy requirements for auxiliary heaters should be minimized and A filter geometry is proposed that is particularly suitable for aiding the progress of chemical processes. Should be.

このＩＪ題は、ディーゼル煤層フィルタが排ガスダクト中に交互に連続して配設 された、貫流溝を備えた複数個の第１及び第２のハニカム体からなり、そのうち の第１のハニカム体は、それ自体公知の方法で触媒的に窒素酸化物及び−酸化炭 素を反応させて窒素又は二酸化炭素にする第１の表面層を備えており、一方第２ のハニカム体はそれ自体公知の方法で触媒的にこれに付着する煤の点火温度を低 下させる第２の表面層を備えていることにより解決される。第１ハニカム体中で 経過する反応は周知の通り発熱反応であることから、この排ガスの温度は第１ハ ニカム体から排出される時点では、第２ハニカム体中に優先的に集まってくる煤 を第２被覆層の存在により低下されている点火温度にするのに十分な程度に高め られている。ディーゼル機関のほとんどの運転状態でこのような連続的なフィル タの自浄作用が実施されるが、その際同様に有害物質と見做すべき窒素酸化物及 び−酸化炭素も同時に危険のない化合物に変えられる。請求の範囲２において少 なくとも第２ハニカ五体に関して提案された円錐形は煤粒子に対するこの第２ハ ニカム体の保留可能性を改善することが実証されている。In this IJ problem, diesel soot layer filters are arranged alternately and consecutively in the exhaust gas duct. It consists of a plurality of first and second honeycomb bodies each having a through-flow groove. The first honeycomb body is catalytically treated with nitrogen oxides and carbon oxides in a manner known per se. a first surface layer that reacts with nitrogen or carbon dioxide; The honeycomb body catalytically lowers the ignition temperature of soot adhering to it in a manner known per se. This problem is solved by providing a second surface layer to be lowered. Inside the first honeycomb body As the reaction that progresses is an exothermic reaction as is well known, the temperature of this exhaust gas is At the time of discharge from the honeycomb body, soot preferentially collects in the second honeycomb body. is raised sufficiently to bring the ignition temperature to a lower ignition temperature due to the presence of the second coating layer. It is being Such a continuous fill under most operating conditions of a diesel engine The self-cleaning effect of the water is carried out, but at that time, nitrogen oxides and other substances, which should be considered as harmful substances, are At the same time, carbon oxides and carbon oxides are converted into non-hazardous compounds. In claim 2, At least the conical shape proposed for the second honeycomb body is It has been demonstrated to improve the retention potential of nicum bodies.

少なくとも第１ハニカム体が排ガス流の流動方向でこのハニカム体の後方に生じ る排ガス流の渦動を助成する形を有している請求の範囲３に提案した構成は、温 度分布が比較的緩やかな先の方法と同じ方向に作用する。排ガス流が第１ハニカ ム体の下流で渦動することにより、この煤粒子は第２ハニカム体中でその壁にぶ つかり、そこに付着し、第２被覆の触媒作用によりその点火温度を下げる可能性 が高まる。請求の範囲４では、例えばその無負荷運転時にも煤の点火に十分な温 度が第２ハニカム体内に確実に得られるようにするために、少なくとも第２ハニ カム体は補助電熱器を備えている。排ガスは第１ハニカ五体内で起こる発熱反応 によってすでに加熱されていることから、補助電熱器は掻く僅かの温度差を克服 するだけでよく、簡単にディーゼル機関で運転される自動車の主を源から給電す ることができる。At least a first honeycomb body is formed behind this honeycomb body in the flow direction of the exhaust gas flow. The configuration proposed in claim 3 has a shape that promotes swirling of the exhaust gas flow. It works in the same direction as the previous method, where the degree distribution is relatively gentle. The exhaust gas flow is the first honeycomb. By swirling downstream of the honeycomb body, the soot particles are deposited in the second honeycomb body against its walls. the ignition temperature may be lowered by the catalytic action of the second coating. increases. In claim 4, for example, even during no-load operation, the temperature is sufficient to ignite soot. At least the second honeycomb is The cam body is equipped with an auxiliary electric heater. The exhaust gas is an exothermic reaction that occurs within the first honeycomb body. Since the auxiliary electric heater is already heated by the You only need to can be done.

本発明の有用な実施態様として請求の範囲５には、ディーゼル煤層フィルタが掃 気を供給するための吸気管を備えていることが提案されている。これにより煤粒 子の酸化にとって十分な酸素を使うことが保証される。As a useful embodiment of the present invention, claim 5 provides a diesel soot layer filter for cleaning. It has been proposed to include an intake pipe for supplying air. This causes soot grains It is ensured that sufficient oxygen is available for the oxidation of the offspring.

掃気用吸気管が排ガスダクトに入る前に後者と熱交換状態におかれている、請求 の範囲６に提案した実施ＵＳによってフィルタの熱収支は改善される。Claims that the scavenging intake pipe is placed in heat exchange with the latter before entering the exhaust gas duct. The heat balance of the filter is improved by the implementation US proposed in scope 6 of .

ディーゼル煤層フィルタを掻めて低温でかつ低い負荷範囲で操作する場合、この 方法では掃気を十分に余熱し得ないことを考慮すべきである。この場合相応して 請求の範囲７において、吸気管が補助加熱器を備えることが提案されている。When operating at low temperatures and in a low load range by scraping the diesel soot layer filter, this It should be taken into account that this method does not allow sufficient preheating of the scavenging air. In this case accordingly In claim 7 it is proposed that the intake pipe is provided with an auxiliary heater.

請求の範囲８によればこの補助加熱器は、有利には掃気によって貫流される少な くとも１個の電気的に加熱された第３のハニカム体からなる。According to claim 8, this auxiliary heater advantageously has a small amount of air flowing through it by the scavenging air. It consists of at least one electrically heated third honeycomb body.

ディーゼル煤層フィルタを自動車で使用する場合、掃気の供給は通常振動により 惹起される動圧によって左右される。自動車の静止時又は静止装置に対しては請 求の範囲９により掃気の供給を少なくとも一時的に送風管によって支援すること が提案されている。When diesel soot layer filters are used in automobiles, the supply of scavenging air is usually caused by vibration. It depends on the induced dynamic pressure. When the vehicle is stationary or for stationary equipment, no request shall be made. According to the requirement 9, the supply of scavenging air is at least temporarily assisted by the blast pipe. is proposed.

第１ハニカム体のセル数が第２ハニカム体のそれよりも少ないという、請求の範 囲ｌＯに提案されている特徴は、煤粒子の分離を第２ハニカム体で初めて行い、 第１ハニカム体中で溝の目詰まりが生じないことを保証する。この特徴により負 荷的に排ガス流の渦動は助成される。Claims in which the number of cells in the first honeycomb body is smaller than that in the second honeycomb body The proposed feature of the IO is that the separation of soot particles is performed for the first time in the second honeycomb body, It is ensured that no clogging of the grooves occurs in the first honeycomb body. This feature causes negative The swirling of the exhaust gas stream is assisted in terms of load.

請求の範囲１１には、第１及び／又は第２及び／又は第３ハニカム体を金属材料 で製造することが提案されている。これに関しては、この種のハニカム体をガソ リン機関からの排ガスの解毒用触媒担体として提供することを出願人に決心させ だのと同し理由、すなわち特に市街での自動車の使用にとって重要な高められた 機械的強度と同時にその作動温度に迅速に到達するということが主な決定的要因 である。更に金属製ハニカム体は直接排ガス流を貫流することができ、従９て提 案された補助加熱器用の加熱体として機能する。Claim 11 provides that the first and/or second and/or third honeycomb body is made of a metal material. It is proposed to be manufactured in Regarding this, this kind of honeycomb body is The applicant decided to provide the catalyst as a catalyst carrier for the detoxification of exhaust gas from phosphorus engines. For the same reason, i.e. increased Mechanical strength and at the same time rapid reaching of its working temperature are the main determining factors It is. Furthermore, the metal honeycomb body can flow directly through the exhaust gas stream, and It functions as a heating element for the proposed auxiliary heater.

請求の範囲１２には排ガス流の渦動を助成する別の特徴、つまり第１ハニカム体 のセルを互いに分離する堰をその下流側の稜で流動方向から曲げることが提案さ れている。これにより惹起されるハニカム体中の圧力損失の増加は極く僅かであ る。なぜなら一層良好な渦動によって煤粒子に対する必要な除去率は、比較的短 い従って圧力損失の減少した第２ハニカム体中でも達せられるからである。Claim 12 also includes another feature that assists the swirling of the exhaust gas flow, that is, a first honeycomb body. It is proposed that the weir separating the cells from each other be bent from the direction of flow at its downstream ridge. It is. The increase in pressure loss in the honeycomb body caused by this is extremely small. Ru. This is because due to better swirling, the required removal rate for soot particles is relatively short. This is because it can be achieved even in the second honeycomb body with reduced pressure loss.

請求の範囲１３によれば、特に一様な出力で運転される、有利には固定機関用と して第１及び／又は第２及び／又は第３ハニカ五体をセラミック材料から製造す る。　この場合本発明の請求の範囲１４に記載した実施１！ｉ欅に相応して、触 媒的に活性（及び金属性）の表面層を同時に補助加熱器の加熱素子として使用す る。According to claim 13, it is particularly suitable for a stationary engine, which is operated with uniform power. and manufacturing the first and/or second and/or third honeycomb body from a ceramic material. Ru. In this case, implementation 1 described in claim 14 of the present invention! i Corresponding to keyaki, touch The mediatically active (and metallic) surface layer can also be used as a heating element in an auxiliary heater. Ru.

提案されているディーゼル煤層フィルタは低い排ガス温度でも作動可能であるこ とから、請求の範囲１５によればフィルタを排ガスダクトのマフラとして構成さ れているその部分に配設する可能性が示されている。ディーゼル煤層フィルタを 取り付けるための位置は一般にこの領域の方がモータの近くよりも良く、また同 時に排気音の消音に利用する、部分的に相対して導かれている溝は掃気供給用溝 と共に一層有利な構造に集積することができる。The proposed diesel soot filter can operate even at low exhaust gas temperatures. Therefore, according to claim 15, the filter is configured as a muffler of an exhaust gas duct. Possibilities for placement in that area are shown. diesel soot layer filter The mounting location is generally better in this area than near the motor, and The grooves that are partially guided opposite each other and are sometimes used to muffle exhaust noise are scavenging air supply grooves. and can be integrated into a more advantageous structure.

本発明の実施例を図面に示すが、この場合第１図はマフラ内に集積されたディー ゼル煤層フィルタの縦断面図、第２図は排ガスダクトの別の箇所に配設されたデ ィーゼル煤層フィルタの縦断面図、第３図は第２図の■−■線に沿った横断面図 、第４図は第３図の細部■の拡大図を表す。An embodiment of the invention is shown in the drawings, in which FIG. Figure 2 is a vertical cross-sectional view of the Zel soot layer filter, showing the device installed at another location in the exhaust gas duct. A vertical cross-sectional view of the diesel soot layer filter, and Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 2. , FIG. 4 shows an enlarged view of detail ① in FIG. 3.

ここには示されていないディーゼル機関の排ガスはダクト１を介して排出される が、その際排ガスの流動方向は矢印２で示されている。第１図に示した実施例で は排ガスダクト１は公知の方法で、防音壁６により互いに分割されている前室３ 、主室４及び集結室５からなるマフラ内に接続されており、このマフラ内には、 その流動方向を何回も変えまた分流ロアを介して分流された排ガスが、集結口８ を介して最終的には大気に開口する排ガスダクト１の延長部に集められるまで貫 流する。排ガス流２の流路には複数個のハニカム体、すなわちここでは円筒状の 部分的に環状に構成された第１のハニカム体９及び第２のハニカム体１０が交互 に配置されている。このハニカム体９．１０はセラミック材料から製造されてい てもよいが、有利には金属薄板から製造することができる。いずれの場合にも第 １ハニカム体９は第１の白金及び／又はロジウム含有被覆を有し、その排ガスに 対する触媒作用は、排ガス中に含まれる一酸化炭素を酸化して二酸化炭素にする と共に、種々の窒素酸化物を分解することにあり、その結果最終的に無害の生成 物が大気中に放散されることになる。当業者には排ガスが一定の化学量論的組成 を有する場合にのみこの触媒反応が有効に進行することは公知である。従って同 様に図示されていない排ガスの組成を調整する装置が必要であるが、これは本発 明の対象ではなく、公知であることを前提とする。第１ハニカム体９の構造は比 較的セルが大きく、従って排ガス中に含まれて連行される煤粒子がその中に無視 し得ないほど沈積することはなく、特にそこに生しる流れは十分に１層状である 。Diesel engine exhaust gases, not shown here, are discharged via duct 1 However, the flow direction of the exhaust gas is indicated by arrow 2. In the embodiment shown in FIG. In a known manner, the exhaust gas duct 1 is divided into a front chamber 3 separated from each other by a soundproof wall 6. , is connected to a muffler consisting of a main room 4 and a gathering room 5, and inside this muffler, The flow direction of the exhaust gas is changed many times and the flow is divided through the flow divider lower. until it is collected in an extension of the exhaust gas duct 1 which finally opens to the atmosphere. Flow. In the flow path of the exhaust gas flow 2, there are a plurality of honeycomb bodies, ie, cylindrical bodies in this case. The first honeycomb body 9 and the second honeycomb body 10, which are partially annular, are arranged alternately. It is located in This honeycomb body 9.10 is manufactured from ceramic material. However, it can advantageously be manufactured from sheet metal. In either case, 1 honeycomb body 9 has a first platinum- and/or rhodium-containing coating, and its exhaust gas The catalytic action oxidizes carbon monoxide contained in exhaust gas into carbon dioxide. together with the decomposition of various nitrogen oxides, resulting in the final production of harmless material will be released into the atmosphere. Those skilled in the art know that the exhaust gas has a certain stoichiometric composition. It is known that this catalytic reaction proceeds effectively only when the Therefore, the same As shown in the figure, a device to adjust the composition of exhaust gas is required, but this is not possible in this project. It is assumed that it is not a subject of public disclosure and is publicly known. The structure of the first honeycomb body 9 is The cells are relatively large, so the soot particles contained and entrained in the exhaust gas are ignored. In particular, the flow that occurs there is sufficiently monolayered. .

第２ハニカム体１０はセル構造が小さく、その結果煤粒子は高率でセルを互いに 分離する堰１１に衝突し、これに付着する。この効果は、第１ハニカ五体９の堰 １】を少なくともその流動方向に見て後端で流動方向から折り曲げ、この処置に より（第４図参照）渦動を促進する突出部１２を形成することによって更に高め られる。これは交互に螺旋状に互いに巻き上げられた平滑薄板１３と波型薄板１ ４とからなる金属製ハニカム体の場合時にば単に実現することができる。第２ハ ニカム体１０はバナジウム酸銀を含む第２被覆を有し、この被覆はここに集まる 煤の点火温度を、この煤が第２ハニカ五体１０のかなりのセルを塞ぐ前に（第１ ハニカム体９内の発熱反応により高められた）排ガス温度により燃焼し始めるの に十分な程度に下げる作用をする。できるだけ完全に処理された、すなわち二酸 化炭素を生じる燃焼は、吸気管１５により供給される付加的な酸素を必要とする 。The second honeycomb body 10 has a small cell structure, and as a result, soot particles have a high rate of displacing cells from each other. It collides with the separating weir 11 and adheres thereto. This effect is due to the weir of the first five bodies 9. 1] is viewed at least in the flow direction and bent from the flow direction at the rear end, and for this treatment (See Fig. 4) By forming the protrusion 12 that promotes vorticity, the height can be further increased. It will be done. This consists of a smooth thin plate 13 and a corrugated thin plate 1 which are wound around each other in a spiral pattern alternately. This can sometimes be realized simply in the case of a metal honeycomb body consisting of 4. 2nd c The nicum body 10 has a second coating containing silver vanadate, which is collected here. The ignition temperature of soot is set before this soot blocks a considerable number of cells of the second honeycomb body 10 (first The exhaust gas temperature (increased by the exothermic reaction within the honeycomb body 9) causes combustion to begin. It has the effect of lowering it to a sufficient degree. as completely processed as possible, i.e. diacid Combustion producing carbon requires additional oxygen supplied by the intake pipe 15 .

この吸気管は排ガス流２内に突出するその開口の適切な形状によって自己吸引的 に作用することができ、その結果外部からの力、例えば動圧の助けを借りなくて も当該ディーゼル機関を装備された自動車等に十分な通気を保証することができ る。排ガス速度が僅かなことから（例えば機関の無負荷運転での）このように作 用する酸素の供給量が十分ではない場合には、第２図に略示したように、通気を 送風管１６により少なくとも一時的に助成することが可能である。吸気管１５は 排ガスに対して向流で導かれまた排ガスと熱交換状態にあることから、通常運転 で掃気の十分な余熱が期待できる。特殊な条件下で、例えば橿端に低い環境温度 では吸気管１５内に、同様に略示されているに過ぎないｔ源ｌＢと接続すること により加熱器として作動する導電性の第３のハニカム体１７を備えることも有利 である。有利には第３ハニカ五体も第１及び第２ハニカム体９．１０と同様に、 交互に平滑薄板１３と波型薄板１４とから螺旋状に構成されていてもよい（第３ 図に視線方向に対して示されている）、排ガス温度が、第１ハニカム体９内での 触媒反応による上昇及び第２ハニカム体上の第２被覆の作用にもかかわらず、煤 を燃焼するのに十分でない場合には、同様に第２ハニカム体１０をｔ源１８と接 続し、加熱器として作動させることも可能である。セラミック材料から製造され たハニカム体９．１０．１７を使用する場合、それ自体が熱導体として作用する 金属性の触媒層を使用するのが有利である。直接熱導体として作用する金属製ハ ニカム体の場合、個々の薄板１３．１４をここには図示されていない絶縁層によ り互いに分離することが必要であることは自明である。第２ハニカム体ＩＯは第 ２図に示したように円錐形をしていてもよい、この形は煤粒子の保留能力を高め ることが明かである。有利なものとして提寓された、重ね合わせて巻き上げられ た薄板１３．１４からなる金属製ハニカム体の場合、この形は、巻き上げた後ハ ニカム体の中心領域を軸方向に押し出すことによって容品に製造することができ る。更に熱の収支を助成するために、ディーゼル煤用フィルタは熱絶縁体１９を 装備してもよい。This intake pipe is self-suctioning due to the appropriate shape of its opening which projects into the exhaust gas stream 2. without the aid of external forces, e.g. dynamic pressure. It is also possible to ensure sufficient ventilation for vehicles equipped with the diesel engine. Ru. Due to the low exhaust gas velocities (e.g. during no-load operation of the engine) If the supply of oxygen is not sufficient for the At least temporary assistance can be provided by the blower pipe 16. The intake pipe 15 is Normal operation You can expect sufficient residual heat from the scavenging air. Under special conditions, e.g. low environmental temperature at the end of the rod Then, in the intake pipe 15, a connection is made to a source tB, which is also only shown schematically. It is also advantageous to provide a third electrically conductive honeycomb body 17 which acts as a heater due to the It is. Advantageously, the third five honeycomb bodies as well as the first and second honeycomb bodies 9.10, It may be configured in a spiral shape by alternately forming smooth thin plates 13 and corrugated thin plates 14 (the third ), the exhaust gas temperature within the first honeycomb body 9 Despite the rise due to the catalytic reaction and the action of the second coating on the second honeycomb body, the soot If it is not sufficient to burn the t-source, the second honeycomb body 10 is similarly connected to the It is also possible to operate it as a heater. Manufactured from ceramic material When using a honeycomb body 9.10.17, it acts as a thermal conductor itself. Preference is given to using metallic catalyst layers. Metal halves that act as direct heat conductors In the case of nicum bodies, the individual laminae 13,14 are covered with an insulating layer, not shown here. It is obvious that it is necessary to separate them from each other. The second honeycomb body IO is It may have a conical shape as shown in Figure 2. This shape increases the retention capacity of soot particles. It is clear that Rolled up one on top of the other, presented as advantageous In the case of a metal honeycomb body made of thin sheets 13.14, this shape is It can be manufactured into a container by extruding the central region of the Nicum body in the axial direction. Ru. To further aid the heat balance, the diesel soot filter is equipped with a thermal insulator 19. May be equipped.

ＦＩＧ　３　ＦＩＧ　ｋ 国際調査報倫 ｍ１ｗ−一―−ｍ、ＰＣＴ／ＥＰ　８９１００４＋０国際調査報告FIG 3 FIG k international investigation affairs m1w-1--m, PCT/EP 891004+0 International Search Report

Claims (15)

【特許請求の範囲】[Claims] １．排ガスダクト（１）中に交互に連続して配設された、貫流溝を備えた複数個 の第１及び第２のハニカム体からなり、そのうちの第１ハニカム体（９）はそれ 自体公知の方法で触媒的に窒素酸化物及び一酸化炭素を反応させて窒素又は二酸 化炭素にする第１の表面層を有しており、第２ハニカム体（１０）は、それ自体 公知の方法で触媒的にそれに付着する煤の点火温度を低下させる第２の表面層を 備えていることを特徴とするディーゼル煤用フィルタ。1. A plurality of through-flow grooves arranged in succession alternately in the exhaust gas duct (1) The first honeycomb body (9) is composed of a first honeycomb body (9) and a second honeycomb body (9). Nitrogen oxide and carbon monoxide are catalytically reacted by a method known per se to produce nitrogen or diacid. the second honeycomb body (10) has a first surface layer that is carbonized; a second surface layer which catalytically reduces the ignition temperature of the soot adhering to it in a known manner. A diesel soot filter characterized by: ２．少なくとも第２ハニカム体（１０）が円錐形を有していることを特徴とする 請求の範囲１記載のディーゼル煤用フィルタ。2. characterized in that at least the second honeycomb body (10) has a conical shape The diesel soot filter according to claim 1. ３．少なくとも第１ハニカム体（９）が、流動方向でハニカム体の後方に生じる 排ガス流（２）の渦動を補助する形（１２）を有することを特徴とする請求の範 囲１又は２記載のディーゼル煤用フィルタ。3. At least a first honeycomb body (9) occurs behind the honeycomb body in the flow direction Claims characterized in that it has a shape (12) that assists the swirling of the exhaust gas flow (2). The diesel soot filter described in Box 1 or 2. ４．少なくとも第２ハニカム体（１０）が補助電熱器（１８）を備えていること を特徴とする請求の範囲１ないし３の１つに記載のディーゼル煤用フィルタ。4. At least the second honeycomb body (10) is provided with an auxiliary electric heater (18). The diesel soot filter according to any one of claims 1 to 3, characterized in that: ５．フィルタが補気を供給するための吸気管（１５）を備えていることを特徴と する請求の範囲１ないし４の１つに記載のディーゼル煤用フィルタ。5. characterized in that the filter is provided with an intake pipe (15) for supplying supplementary air; A diesel soot filter according to any one of claims 1 to 4. ６．吸気管（１５）が排ガスダクト（１）に人る前に後者と熱交換状態にあるこ とを特徴とする請求の範囲５記載のディーゼル煤用フィルタ。6. It is ensured that the intake pipe (15) is in heat exchange with the exhaust gas duct (1) before entering the latter. The diesel soot filter according to claim 5, characterized in that: ７．吸気管（１５）が補助加熱器（１７）を備えていることを特徴とする請求の 範囲５又は６記載のディーゼル煤用フィルタ。7. Claim characterized in that the intake pipe (15) is equipped with an auxiliary heater (17) Diesel soot filter according to range 5 or 6. ８．補助加熱器が補気の貫流する、少なくとも１個の電気的に（１８）加熱され た第３のハニカム体（１７）からなることを特徴とする請求の範囲７記載のディ ーゼル煤用フィルタ。8. The auxiliary heater has at least one electrically heated (18) through which the auxiliary air flows. The diode according to claim 7, characterized in that it consists of a third honeycomb body (17). - Filter for soot. ９．補気の供給を少なくとも一時的に補助する送風管（１６）を有していること を特徴とする請求の範囲５ないし８の１つに記載のディーゼル煤用フィルタ。9. It has a blower pipe (16) that at least temporarily assists in supplying supplemental air. The diesel soot filter according to any one of claims 5 to 8, characterized in that: １０．第１ハニカム体（９）のセル数が第２ハニカム体（１０）のそれよりも少 ないことを特徴とする請求の範囲１ないし９の１つに記載のディーゼル煤用フィ ルタ。10. The number of cells in the first honeycomb body (9) is smaller than that in the second honeycomb body (10). The diesel soot filter according to one of claims 1 to 9, characterized in that: Ruta. １１．第１（９）及び／又は第２（１０）及び／又は第３（１７）ハニカム体が 金属材料から製造されていることを特徴とする請求の範囲１ないし１０の１つに 記載のディーゼル煤用フィルタ。11. The first (9) and/or the second (10) and/or the third (17) honeycomb body According to one of claims 1 to 10, characterized in that it is manufactured from a metallic material. Diesel soot filter listed. １２．第１ハニカム体（９）のセルを互いに分離する堰（１１）がその下流側の 稜で流動方向から曲げられている（１２）ことを特徴とする請求の範囲３及び１ １に記載のディーゼル煤用フィルタ。12. A weir (11) separating the cells of the first honeycomb body (9) from each other is located downstream of the weir (11). Claims 3 and 1 characterized in that it is bent from the flow direction at the edge (12). 1. The diesel soot filter according to 1. １３．第１（９）及び／又は第２（１０）及び／又は第３（１７）ハニカム体が セラミック材料から製造されていることを特徴とする請求の範囲１ないし１０の １つに記載のディーゼル煤用フィルタ。13. The first (9) and/or the second (10) and/or the third (17) honeycomb body Claims 1 to 10 characterized in that it is manufactured from a ceramic material. The diesel soot filter described in item 1. １４．触媒活性の表面層が同時に補助加熱器の加熱素子であることを特徴とする 請求の範囲４及び１３記載のディーゼル煤用フィルタ。14. characterized in that the catalytically active surface layer is at the same time the heating element of the auxiliary heater The diesel soot filter according to claims 4 and 13. １５．フィルタが排ガスダクト（１）のマフラ（３−５）として構成されている 部分に配設されていることを特徴とする請求の範囲１ないし１４の１つに記載の ディーゼル煤用フィルタ。15. The filter is configured as a muffler (3-5) in the exhaust gas duct (1) as claimed in one of claims 1 to 14, characterized in that it is arranged in a section. Diesel soot filter.
JP50411789A 1989-04-17 1989-04-17 Diesel soot filter with auxiliary equipment for reducing nitrogen oxides and/or oxidizing carbon monoxide Pending JPH04504603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1989/000410 WO1990012950A1 (en) 1989-04-17 1989-04-17 Diesel-soot filter with additional device for reducing oxides of nitrogen and/or oxidizing carbon monoxide

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