JPH09317440A - Exhaust particulate purifier for internal combustion engine - Google Patents

Exhaust particulate purifier for internal combustion engine

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Publication number
JPH09317440A
JPH09317440A JP12956596A JP12956596A JPH09317440A JP H09317440 A JPH09317440 A JP H09317440A JP 12956596 A JP12956596 A JP 12956596A JP 12956596 A JP12956596 A JP 12956596A JP H09317440 A JPH09317440 A JP H09317440A
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Prior art keywords
fuel
exhaust
internal combustion
combustion engine
filter
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JP12956596A
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Japanese (ja)
Inventor
Shinji Miyoshi
Jiro Takagi
Takayuki Takeuchi
新二 三好
隆之 竹内
二郎 高木
Original Assignee
Nippon Soken Inc
株式会社日本自動車部品総合研究所
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/105General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106Auxiliary oxidation catalysts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/009Exhaust 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 two or more separate purifying devices arranged in series
    • F01N13/0097Exhaust 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 two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/025Exhaust 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 fuel burner or by adding fuel to exhaust
    • F01N3/0253Exhaust 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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/033Exhaust 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 in combination with other devices
    • F01N3/035Exhaust 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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/03Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/10Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F01N2610/102Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance after addition to exhaust gases, e.g. by a passively or actively heated surface in the exhaust conduit

Abstract

PROBLEM TO BE SOLVED: To regenerate a filter for scavenging particulates in exhaust gas in an exhaust particulate purifier which is operated even under a temperature to activate its catalyst by providing a fuel feed means in the upstream with respect to the filter and providing exothermic bodies of fuel absorbing structure between the fuel feed means and the filter.
SOLUTION: When a filter 7 is to be regenerated, if the oxidation catalysts carried by a catalyst carrier 9 and by heating bodies 4 are not heated up to their activation temperature, heaters 42 are energized to heat the heating bodies 4 from their inside after which a fuel feed means 1 injects fuel droplets 8 into exhaust gas 2. When the resultant mixed gas passes near the heating bodies 4, the exhaust gas 2 streams while curving around the respective heating bodies 4 and thus does not hardly flow into fuel absorbing members 4, while the fuel droplets 8 travel straight against the heating bodies 4 and penetrate the fuel absorbing members 41 to be oxidized or burned therein and emitted out therefrom again into the exhaust gas. As a result, the exhaust gas flowing into the catalyst carrier 9 is heated up to heat the oxidation catalyst carried by the catalyst carrier 9 up to its activation temperature.
COPYRIGHT: (C)1997,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は内燃機関の排気ガス浄化装置に関し、特にディーゼルエンジンに有効に適用され、排気ガス中に含まれる微粒子を捕集し浄化するための装置に関するものである。 Relates to an exhaust gas purification apparatus of the present invention is an internal combustion engine TECHNICAL FIELD OF THE INVENTION, in particular is effectively applied to a diesel engine, to an apparatus for fine particles was collected purified contained in the exhaust gas.

【0002】 [0002]

【従来の技術】特開昭58−38311号公報には、フィルタを有する内燃機関の排気微粒子浄化装置において、フィルタに捕集されて堆積した排気中の微粒子(以下、パティキュレートと記す。)を燃焼除去してフィルタの捕集能力を再生する手段の一つとして、フィルタに触媒を担持してフィルタ上流に燃料供給手段を設けた構成からなり、排気温が高く、触媒が活性化している運転状態にある時に、燃料供給手段によりフィルタに燃料を供給し、触媒による燃料の酸化反応熱により、フィルタ上に堆積したパティキュレートをその着火温度以上に加熱して燃焼除去するフィルタの再生方法が開示されている。 BACKGROUND OF THE INVENTION JP-58-38311 discloses an exhaust particulate emission control device for an internal combustion engine having a filter, particulates in the exhaust gas deposited been trapped in the filter (hereinafter, referred to as particulates.) The operation as a means to burn and remove Play trapping capacity of the filter, made from a configuration in which a fuel supply means to the filter upstream catalyst is supported on the filter, exhaust temperature is high, the catalyst is activated when in the state, the fuel is supplied to the filter by the fuel supply means, the oxidation reaction heat of fuel by catalytic method of reconstruction filter to burn removed by heating the particulates accumulated on the filter above its ignition temperature is disclosed It is.

【0003】しかしながら、このフィルタ再生方法では、排気の温度が低くて触媒が活性化温度に達しない低エンジン回転、低負荷の運転状態においては、フィルタに燃料を供給しても燃料が酸化しないために、パティキュレートを燃焼除去することができない。 However, since this filter regeneration process, a low engine rotation catalyst temperature of the exhaust is low does not reach the activation temperature, the operation state of low load, the fuel is not oxidized even by supplying fuel to the filter in, you are not possible to burn and remove particulates. このような運転状態が続くと、パティキュレートが過度に堆積して排圧が上昇してエンジンの性能を著しく低下させるばかりでなく、やがてはフィルタに目詰まりを生じて走行が困難となるという問題を生じる。 If such an operating state continues, not only significantly reduces the performance of the engine increases and exhaust pressure particulates is excessively deposited, eventually that travels clogged the filter is difficult problem cause.

【0004】 [0004]

【発明が解決しようとする課題】前記問題点に鑑み、本発明は排気温が低く、触媒が活性化温度に達しないいかなる運転状態においても、触媒を活性化温度以上に昇温できる手段を備えた、全運転領域でフィルタを再生可能な排気微粒子浄化装置を提供することを目的とする。 In view of the problems [0008] The present invention is the exhaust gas temperature is low, in any operating condition in which the catalyst does not reach the activation temperature, comprising means capable of raising the temperature of the catalyst activation temperature or higher It was, and to provide a renewable exhaust particulate purifier filters the entire operating range.

【0005】 [0005]

【課題を解決するための手段】本発明は前記目的を達成するために請求項1ないし請求項7に記載した技術的手段を採用するものである。 Means for Solving the Problems] The present invention employs the technical means described in claims 1 to 7 in order to achieve the object. 請求項1の構成によれば、フィルタ再生時において排気温が低い場合にも、燃料吸収構造を有する発熱体を発熱させることにより、排気温度を上昇させた後に、燃料供給手段により排気中に適量の燃料液滴を供給する。 According to the first aspect, an appropriate amount in the exhaust when the exhaust air temperature is low during filter regeneration may, by heating the heating element having a fuel absorbent structure, after increasing the exhaust gas temperature, the fuel supply means supplying the fuel droplets. すると、排気中の燃料液滴は燃料吸収構造を有する発熱体にぶつかり、燃料液滴は燃料吸収構造を有する発熱体により吸収加熱されて酸化、燃焼して排気温度を更に上昇させる。 Then, the fuel droplets in the exhaust gas collides with the heating element having a fuel absorbent structure, the fuel droplets oxide is absorbed heated by the heating element having a fuel absorbent structure, further increasing the exhaust temperature by combustion. そしてHC(炭化水素)を含んだ排気は酸化、燃焼されて最終的に排気をパティキュレート燃焼温度以上に加熱される。 The exhaust gas containing HC (hydrocarbon) is oxidized, burned and heated finally evacuated to more particulate combustion temperature. その結果、 as a result,
フィルタに捕集されていたパティキュレートは燃焼温度以上になり燃焼してフィルタが再生される。 Particulates have been trapped in the filter is the filter is regenerated by burning becomes less than the combustion temperature.

【0006】請求項2の構成によれば、発熱体で加熱された排気ガスの温度が、触媒担体に担持された酸化触媒の活性化温度以上に加熱され、HCを含んだ排気は酸化触媒を担持された触媒担体を通過する時酸化、燃焼されて更に加熱される。 [0006] According to the second aspect, the temperature of the heated exhaust gases in the heating element is heated above the activation temperature of the supported oxidation catalyst on the catalyst carrier, an exhaust containing the HC oxidation catalyst oxidized when passing through the supported catalyst support, it is further heated by the combustion. 従って、HCを含んだ排気は効率よくパティキュレート燃焼温度以上に加熱されることができる。 Therefore, exhaust gas containing HC can be heated above efficiently particulate combustion temperature.

【0007】請求項3の構成によれば、電気ヒ−タと燃料吸収部材が別体であるために、電気ヒ−タによらず燃料吸収部材の容積を自由に変えられ、また電気ヒ−タに通電することにより伝熱により燃料吸収部材を加熱させるため、少ない電力量で燃料吸収構造を有する発熱体に染み込んだ燃料液滴を簡単に加熱して酸化、燃焼させることができる。 [0007] According to the third aspect, the electric heat - for motor fuel absorbing member is a separate, electric heat - freely changed the fuel absorbing member regardless of the data volume, also electric heat - for heating the fuel absorbing member by heat transfer by conduction to the motor briefly heated to oxidize the fuel droplets soaked in the heating element having a fuel absorbent structure with a small amount of power, it can be burnt.

【0008】請求項4の構成によれば、燃料吸収部材自身に通電することにより、燃料吸収部材全体を均一に発熱させて、発熱部と燃料の接触面積が大きく、効率良く導電性の燃料吸収部材に染み込んだ燃料液滴を簡単に加熱して酸化、燃焼させることができる。 According to the fourth aspect, by energizing the fuel absorbing member itself, the entire fuel absorbing member was uniformly heating the contact area of ​​the heat generating portion and the fuel is large, efficiently conductive fuel absorption briefly heated to oxidize the fuel droplets soaked in member, it can be burnt. 請求項5の構成によれば、排気中の燃料液滴を発熱体に効率良く付着させることができ、排気中に供給する燃料液滴が少ない場合にも効率良く排気を加熱することができる。 According to the fifth aspect, it is possible to the fuel droplets in the exhaust efficiently attached to the heating element can be heated efficiently exhaust even if the fuel droplets is less supplied to the exhaust.

【0009】請求項6の構成によれば、発熱体を構成する部材に酸化触媒を担持させているので、発熱体に染み込んだ燃料液滴をより低い温度で酸化、燃焼させることができるので、発熱体による加熱が少なくても良いという効果がある。 According to the configuration of claim 6, since by supporting an oxidation catalyst on the members constituting the heat generating element, oxidizing the fuel droplets soaked in the heating element at a lower temperature, it is possible to burn, less heating by the heating element there is an effect that may be. 請求項7の構成によれば、排気中の微粒子を捕集するためのフィルタに酸化触媒を担持することにより、酸化触媒を担持された触媒担体において酸化、 According to the configuration of claim 7, by supporting the filter oxidation catalyst for trapping particulate in the exhaust gas, the oxidation in the catalyst support is supporting an oxidation catalyst,
燃焼されなかったHCを酸化、燃焼して排気ガスを浄化することができるという効果がある。 Oxidize HC that has not been burned, there is an effect that it is possible to purify the exhaust gas by combustion.

【0010】 [0010]

【発明の実施の形態】図1及び図2は本発明の第1の実施形態に関するものであり、図1(a)は本発明の排気微粒子浄化装置の側面断面図であり、図1(b)は排気2と排気中に噴射された燃料液滴8の混合気が発熱体4 1 and 2 DETAILED DESCRIPTION OF THE INVENTION relates to the first embodiment of the present invention, FIG. 1 (a) is a side sectional view of the exhaust particulate purifying apparatus of the present invention, FIG. 1 (b ) is the air-fuel mixture heating element 4 of the fuel droplets 8 injected into the exhaust the exhaust 2
の近傍を通過する時の状況を示す拡大図、図2は排気微粒子浄化装置の排気の流れに沿った各位置における排気の昇温過程を示す説明図である。 Enlarged view showing the situation when it passes through the vicinity of, FIG. 2 is an explanatory view showing the heating process of the exhaust gas in each position along the flow of exhaust in the exhaust particulate purifier.

【0011】図1(a)に示すように、内燃機関の排気管路3中には排気中の微粒子を捕集するための酸化触媒を担持したフィルタ7、その上流に設けられ酸化触媒を担持した触媒担体9、触媒担体9の上流に設けられ、排気中に燃料を供給するための燃料供給手段1、燃料供給手段1と触媒担体9との間に設けられ、全体あるいは一部に酸化触媒を担持された発熱体4が、酸化触媒を担持させた触媒担体9の上流に、適当な間隔をあけて、排気管路3の径方向に平行に互い違いに複数列配置されている。 [0011] As shown in FIG. 1 (a), the filter 7 carrying the oxidation catalyst for the exhaust pipe 3 of an internal combustion engine for trapping particulate in the exhaust gas, supporting an oxidation catalyst disposed upstream thereof catalyst carrier 9 was disposed upstream of the catalyst carrier 9, is provided between the fuel supply means 1, the fuel supply means 1 and the catalyst carrier 9 for supplying fuel into the exhaust gas, the oxidation catalyst in whole or in part a heating element 4 which is supported is, upstream of the catalyst carrier 9 is supported an oxidation catalyst, at appropriate intervals and parallel to alternately a plurality of rows arranged in the radial direction of the exhaust pipe 3.

【0012】図1(b)に示すように、第1の実施形態では発熱体4のヒータ42はシースヒータまたは外周部が絶縁された電気ヒータからなり、棒状に成型されており、電気ヒータ42の周りには、燃料吸収用の部材41 [0012] As shown in FIG. 1 (b), in the first embodiment the heater 42 of the heating element 4 consists electric heater sheath heater or the outer peripheral portion is insulated, are molded into a rod shape, the electric heater 42 around, members for a fuel absorbent 41
として、メッシュ状に成型された耐熱性の部材を配している。 As it has arranged thermostable member molded into meshes. フィルタ7の再生時で、排気温が低く、触媒担体9及び発熱体4に担持された酸化触媒が活性化温度に達していない場合、ヒータ42に通電し、ヒータ42により発熱体4の内部が発熱体4の燃料吸収部材41に担持された酸化触媒の活性化温度、あるいは燃料の燃焼温度以上に加熱された後に、燃料供給手段1により排気中に燃料液滴を噴射する。 In reproducing the filter 7, the exhaust temperature is low, if the oxidation catalyst supported on the catalyst carrier 9 and the heating element 4 has not reached the activation temperature, by energizing the heater 42, the internal heating body 4 by the heater 42 after being heated carried on the fuel absorbing member 41 of the heating element 4 was the activation temperature of the oxidation catalyst or above the combustion temperature of the fuel, in to inject fuel droplets in the exhaust gas by the fuel supply means 1.

【0013】排気2と排気中に噴射された燃料液滴8の混合気が、発熱体4の近傍を通過するとき、図1(b) [0013] When the mixture of exhaust 2 and fuel droplets 8 that have been injected into the exhaust gas, which passes through the vicinity of the heating element 4, and FIG. 1 (b)
に示すように排気2の流れは発熱体4の周りを湾曲して流れ、適度に密に成型された燃料供給部材41には、通気抵抗のためにほとんど排気2が流入しない。 Flows curved around the heating element 4 exhaust 2 of the flow as shown in, the fuel supply member 41, which is reasonably close molding, hardly exhaust 2 flows for ventilation resistance. これに対して、燃料液滴8は慣性が強いために、発熱体4の近傍においてもそのまま直進して発熱体4に衝突し、メッシュ状の燃料吸収部材41に染み込み、内部で酸化触媒により酸化、あるいはヒータ42の熱により燃焼し、再び排気中に抜け、触媒担体9に流入する排気が加熱されて、触媒担体9に担持された酸化触媒が活性化温度に達する。 In contrast, the fuel droplets 8 in order inertia is strong, also impinges on the heating element 4 and goes straight in the vicinity of the heating element 4, it soaks into meshes of the fuel absorbing member 41, the oxidation by the oxidation catalyst within the or burned by the heat of the heater 42, missing again in the exhaust, the exhaust gas flowing into the catalyst carrier 9 is heated, supported oxidation catalyst on the catalyst carrier 9 reaches the activation temperature.

【0014】発熱体4の第1列目で分離できなかった燃料液滴は、第2列目の互い違いに配せられた発熱体で分離される。 [0014] fuel droplets which could not be separated in the first column of the heating member 4 is separated by the second column of the staggered Haise was heating element. この時、発熱体4内部に流れ込む排気の量は極少量であり、発熱体4の内部で排気に奪われる熱量は非常に少ないため、低消費電力でありながら内部では高温に保たれている。 At this time, the amount of exhaust gas flowing into the internal heating body 4 is extremely small amount, since the amount of heat lost to exhaust inside the heating element 4 is very small, within yet low power consumption is kept at a high temperature. また、発熱体4は排気中の燃料液滴を一度内部に染み込ませて加熱するという方法をとっているために、燃料液滴8が酸化触媒及び高温領域にさらされている時間が長く、燃料液滴8を効率良く酸化あるいは燃焼させることができる。 Furthermore, the heating element 4 in order to have taken a method of heating the impregnated therein the fuel droplets in the exhaust once, long time fuel droplets 8 is exposed to the oxidation catalyst and the high-temperature region, the fuel droplets 8 can be efficiently oxidized or combusted.

【0015】図2は排気微粒子浄化装置の排気の流れに沿った各位置における排気の昇温過程を示す説明図である。 [0015] FIG. 2 is an explanatory view showing the heating process of the exhaust gas in each position along the flow of exhaust in the exhaust particulate purifier. 図2に示すように、発熱体4で酸化あるいは燃焼した燃料の酸化熱あるいは燃焼熱により、酸化触媒を担持した触媒担体9に流入する排気は、酸化触媒の活性化温度以上に加熱される。 As shown in FIG. 2, by oxidation heat or combustion heat of the oxidation or burning fuel in the heating element 4, the exhaust gas flowing into the catalyst support 9 carrying the oxidation catalyst, is heated above the activation temperature of the oxidation catalyst. その後、燃料供給手段による燃料液滴の噴射量を増加することにより、触媒担体9に充分な未燃の燃料を供給し、触媒担体9での燃料の酸化反応熱によりフィルタ7に流入する排気をパティキュレートの燃焼温度以上に加熱し、フィルタ7に堆積したパティキュレートを燃焼除去してフィルタ7を再生する。 Then, by increasing the injection quantity of the fuel droplets by the fuel supply means, the supply of fuel sufficient unburned catalyst support 9 and flows into the filter 7 by an oxidation reaction heat of the fuel at the catalyst carrier 9 exhaust heated above the combustion temperature of the particulate, the particulate deposited on the filter 7 by burning and removing regenerating the filter 7. ここで、フィルタ7に担持された触媒は、触媒担体9において酸化されなかった燃料をフィルタ7で酸化、燃焼して浄化させるためのものであり、燃料の吹き抜けを防止する。 Here, the catalyst supported on the filter 7, oxidizing a fuel that has not been oxidized in the catalyst carrier 9 by the filter 7 is for to purify burned to prevent blow-by of fuel.

【0016】一方、フィルタ再生時で排気温が高く酸化触媒が活性化温度に達している場合には、発熱体4に通電して加熱しなくても、燃料供給手段により排気中に供給された燃料液滴は、触媒担体9において酸化され、生じた反応熱により排気をパティキュレートの燃焼温度以上に昇温してフィルタ7に堆積したパティキュレートを燃焼する。 [0016] On the other hand, if the exhaust temperature at the time of filter regeneration is higher oxidation catalyst reaches the activation temperature, even without heating by energizing the heating element 4, which is fed into the exhaust by the fuel supply means fuel droplets are oxidized in the catalyst carrier 9, the resulting reaction heat by elevating the temperature of the exhaust above the combustion temperature of the particulate burning the particulates deposited on the filter 7.

【0017】また、この時加熱されていない発熱体4に燃料液滴が染み込むが、発熱体4に担持されている酸化触媒が活性化温度以上にあるために、燃料液滴は酸化され、気体となって排気中に出て行くため、発熱体4の内部に液状の燃料が滞留してしまうことは無い。 Further, the fuel droplets to the heating element 4 which this time has not been heated soaks, to oxidation catalyst supported on the heat-generating member 4 is above the activation temperature, the fuel droplets is oxidized, gaseous since exiting in the exhaust becomes, never liquid fuel will be retained in the interior of the heating element 4. なお、燃料吸収部材41はメッシュ状に成形された部材の他にも、多孔質体や発泡質体のように燃料の染み込む構造体であればよく、内部のヒータ42と絶縁されているか、 Incidentally, if the fuel absorbing member 41 in addition to the members formed into a mesh shape may be a structure that permeates the fuel as a porous body or foam quality material and is insulated from the interior of the heater 42,
それ自身が絶縁体であればよい。 Itself may be an insulator. また、フィルタ7に酸化触媒を担持しない場合にもフィルタ7の再生は良好に行われる。 Further, regeneration of the filter 7 even when carrying no oxidation catalyst filter 7 is satisfactorily performed.

【0018】図3は本発明の第2の実施形態の内燃機関の排気微粒子浄化装置の側面断面図である。 [0018] FIG. 3 is a side cross-sectional view of the exhaust particulate purifying apparatus for an internal combustion engine of the second embodiment of the present invention. 図3においては発熱体4全体が導電性のヒータ用部材からなり、燃料が内部に染み込むように、発熱体4は例えばメッシュ状に成形されたヒータ部材を幾層にも巻いて棒状に成形され、全体または一部に酸化触媒を担持された発熱体4 Entire heating element 4 is made from the heater member for conducting in FIG. 3, the fuel is so soak into inside the heating element 4 is shaped into a rod shape it is also wound in several layers a heater member formed, for example, a mesh-like , the heating element 4 which is supported an oxidation catalyst in whole or in part
を酸化触媒を担持された触媒担体9の上流に、排気管径の方向に平行に互い違いに複数列配置している。 The upstream of the catalyst carrier 9 which an oxidation catalyst is carried, in parallel to alternately and a plurality of rows arranged in the direction of the exhaust pipe diameter.

【0019】本実施形態においても、第1の実施形態と同様に、フィルタ7の再生時で、排気温が低く、酸化触媒が活性化していないときに、燃料供給手段1により排気中に噴射された燃料液滴8は、あらかじめ通電し全体が加熱された発熱体4の内部に染み込み、酸化あるいは燃焼して、触媒担体9に流入する排気を加熱して触媒担体9に担持された触媒を活性化させる。 [0019] Also in this embodiment, as in the first embodiment, in reproducing the filter 7, the exhaust temperature is low, when the oxidation catalyst is not activated, is injected into the exhaust by the fuel supply means 1 fuel droplets 8 permeates into the interior of the heating element 4 to the entire energized in advance is heated, oxidized or combusted to heat the exhaust gas flowing into the catalyst carrier 9 catalyst carrier 9 to supported catalysts active to reduction.

【0020】なお、発熱体4としては前記のようなメッシュ状に成形されたヒータ部材の他にも、多孔質金属体や発泡金属体、焼結金属体など、燃料の染み込む構造を持ち、ヒータ用部材として使用できるものであればよい。 [0020] Incidentally, in addition to the heater member formed in a mesh shape as described above as heaters 4, it has a porous metal body and metal foam body, such as a sintered metal body, the soaking of the fuel structure, the heater as long as it can be used as a use member. また、フィルタ7に触媒を担持しない場合にもフィルタ7の再生は良好に行われる。 Further, regeneration of the filter 7 even when carrying no catalyst on the filter 7 is satisfactorily performed.

【0021】図4は本発明の第3の実施形態に関するものであり、(a)は側面断面図、(b)は(a)中のA [0021] Figure 4 is related to the third embodiment of the present invention, (a) is a side cross-sectional view, in (b) is (a) A
−A断面図である。 -A is a cross-sectional view. 第3の実施形態は棒状の発熱体を平行に配していた第1の実施形態もしくは第2の実施形態の発熱体4を渦巻き状に配したものである。 The third embodiment is an arranged heating element 4 of the first embodiment or the second embodiment which has been arranged in parallel with the heating element of the rod-shaped spiral. 図5は本発明の第4の実施形態に関するものであり、(a)は側面断面図、(b)は(a)中のA−A断面図である。 Figure 5 relates fourth embodiment of the present invention, (a) is a side sectional view, (b) is an A-A sectional view in (a).

【0022】第4の実施形態は棒状の発熱体を平行に配していた第1の実施形態もしくは第2の実施形態の発熱体4を、中心電極10から放射状に広がる形状に配したものである。 The fourth embodiment in which arranged in a shape that spreads the heat generating element 4 of the first embodiment or the second embodiment which has been arranged in parallel with the heating element of the rod-shaped, radially from the center electrode 10 is there. 図6は本発明の第5の実施形態の側面断面図である。 6 is a side cross-sectional view of a fifth embodiment of the present invention. 第5の実施形態は第1の実施形態の第1列目の発熱体4の上流側に整流用部材20を設けたものである。 The fifth embodiment is an a rectifying member 20 provided on the upstream side of the first row of the heating elements 4 of the first embodiment. 整流用部材20により排気2は湾曲して第1列目の発熱体4に向かって流れる。 2 exhausted by rectifying member 20 flows toward the heat generating element 4 of the first row is curved. また、慣性力により整流用部材20に衝突して付着した燃料液滴8も排気2により第1列目発熱体4方向へ押し流され、第1列目の発熱体4の近傍を流れる燃料液滴の量が増加し、第1列目の発熱体4に効率良く燃料液滴が吸収され、酸化あるいは燃焼する。 The fuel droplets 8 deposited collide with the rectifying member 20 by the inertial force is also washed away by the exhaust 2 to the first row heating element 4 direction, fuel droplets flowing in the vicinity of the first row of the heating elements 4 the amount is increased, efficiently fuel droplets to the heating element 4 of the first row is absorbed, oxidized or combusted.

【0023】従って、発熱体を第1列目のみにする構造としてもよい。 [0023] Thus, it may be a heating element as structure only in the first column. また、本実施形態の整流用部材20は第2ないし第4の実施形態に適用してもよい。 Further, rectification member 20 of this embodiment may be applied to the second to fourth embodiments. 図7は本発明の第6の実施形態の側面断面図である。 Figure 7 is a side sectional view of a sixth embodiment of the present invention. 第6の実施形態は、触媒担体9を無くし、酸化触媒を担持したフィルタ7と、発熱体4および燃料供給手段1から構成されているものである。 The sixth embodiment eliminates the catalyst carrier 9, a filter 7 carrying the oxidation catalyst, in which is composed of the heating element 4 and the fuel supply means 1. 第6の実施形態においては、発熱体4 In the sixth embodiment, the heating element 4
はフィルタ7に担持された酸化触媒を活性化温度以上に昇温する時に用いられ、フィルタ7に供給された燃料液滴8がフィルタ7に担持された酸化触媒によって酸化された時に生じた酸化反応熱により、フィルタ7に堆積したパティキュレートを燃焼してフィルタ7を再生する。 Used when the temperature of the oxidation catalyst supported by the filter 7 to the activation temperature or higher, oxidation reaction in which the fuel droplets 8 which is supplied to the filter 7 has occurred when it is oxidized by the oxidation catalyst supported by the filter 7 by heat, by burning particulates accumulated in the filter 7 to regenerate the filter 7.

【0024】図8は本発明の第7の実施形態で用いる発熱体の径方向の断面図である。 [0024] FIG 8 is a seventh cross-sectional drawing in the radial direction of the heat generating element used in the embodiment of the present invention. 第7の実施形態は、第1 The seventh embodiment, first
の実施形態の発熱体4において、発熱体外周の燃料吸収部材41が内部のヒータ42と密着した伝熱性の高い部材からなる厚い層43と、その厚い層43の外側に設けられた伝熱性の低い部材からなる薄い層44の2層から構成されているものである。 Of the heating element 4 of the embodiment, the fuel absorbing member 41 of the heating element periphery and the thick layer 43 made of a member having high heat conductivity in close contact with the interior of the heater 42, the heat transfer provided outside of the thick layer 43 are those composed of two layers of thin layer 44 of a low member. ヒータ42により燃料吸収部材を加熱したとき、内側の厚い層43は伝熱性が高いために短時間で加熱されるが、外側の薄い層44は伝熱性が低いために内側の厚い層43を加熱した熱が外に逃げにくく、内側の厚い層43において燃料を効率良く酸化あるいは燃焼することができる。 When heating the fuel absorbing member by the heater 42, although a thicker layer 43 inside of is heated in a short time due to the high heat conductivity, the thin external layer 44 heat the thick layer 43 of the inner due to the low heat conductivity the heat is hard to escape to the outside, it is possible to efficiently oxidizing or combusting a fuel in the inside thick layer 43.

【0025】以上本発明によれば、酸化触媒による燃料の酸化反応熱によりフィルタに堆積したパティキュレートを燃焼させる方式の内燃機関の排気微粒子浄化装置において、排気温度が低く、酸化触媒が活性化温度に達していないどのような運転状態においても酸化触媒を触媒の活性化温度以上に加熱することができ、全運転領域において、フィルタを良好に再生することができる。 According to the present invention above, in the exhaust particulate purification system of an internal combustion engine system for burning particulates accumulated in the filter by oxidation reaction heat of fuel by the oxidation catalyst, the exhaust gas temperature is low, the oxidation catalyst activation temperature also it is possible to heat the oxidation catalyst activation temperature or higher of the catalyst in any operating state is not reached, in the entire operating range, it is possible to regenerate the filter satisfactorily.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の第1の実施形態に関するものであり、 [1] it relates to the first embodiment of the present invention,
(a)は本発明の排気微粒子浄化装置の側面断面図であり、(b)は排気2と排気中に噴射された燃料液滴8の混合気が発熱体4の近傍を通過する時の状況を示す拡大図である。 (A) is a side sectional view of the exhaust particulate purifying apparatus of the present invention, (b) the situation when the mixture of fuel droplets 8 injected into the exhaust the exhaust 2 passes near the heating element 4 it is an enlarged view showing a.

【図2】本発明の第1の実施形態に関するものであり、 [2] it relates to the first embodiment of the present invention,
排気微粒子浄化装置の排気の流れに沿った各位置における排気の昇温過程を示す説明図である。 Along the flow of the exhaust gas exhaust particulate purifying apparatus is an explanatory diagram showing a Atsushi Nobori process of the exhaust gas in each position.

【図3】本発明の第2の実施形態の内燃機関の排気微粒子浄化装置の側面断面図である。 3 is a side cross-sectional view of the exhaust particulate purifying apparatus for an internal combustion engine of the second embodiment of the present invention.

【図4】本発明の第3の実施形態に関するものであり、 [4] it relates to the third embodiment of the present invention,
(a)は側面断面図、(b)は(a)中のA−A断面図である。 (A) is a side sectional view, (b) is an A-A sectional view in (a).

【図5】本発明の第4の実施形態に関するものであり、 [5] it relates fourth embodiment of the present invention,
(a)は側面断面図、(b)は(a)中のA−A断面図である。 (A) is a side sectional view, (b) is an A-A sectional view in (a).

【図6】本発明の第5の実施形態の側面断面図である。 6 is a side cross-sectional view of a fifth embodiment of the present invention.

【図7】本発明の第6の実施形態の側面断面図である。 7 is a side cross-sectional view of a sixth embodiment of the present invention.

【図8】本発明の第7の実施形態で用いる発熱体の径方向の断面図である。 8 is a seventh cross-sectional drawing in the radial direction of the heat generating element used in the embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 燃料供給手段 3 排気管路 4 発熱体 7 フィルタ 9 触媒担体 41 燃料吸収部材 42 電気ヒータ 1 fuel supply means 3 exhaust pipe 4 heating element 7 filter 9 catalyst support 41 fuel absorbing member 42 electric heater

Claims (7)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 内燃機関の排気管路中に設けられた排気中の微粒子を捕集するためのフィルタと、該フィルタ上流に設けられた排気中に燃料を供給するための燃料供給手段と、該燃料供給手段と前記フィルタとの間に設けられた燃料吸収構造を有する発熱体とを備えていることを特徴とする内燃機関の排気微粒子浄化装置。 And 1. A filter for trapping particulate in the exhaust gas provided in an exhaust pipe of an internal combustion engine, a fuel supply means for supplying fuel to the exhaust gas provided in the filter upstream, exhaust particulate purification system of an internal combustion engine, characterized in that it comprises a heating element having a fuel absorbent structure provided between the fuel supply means and the filter.
  2. 【請求項2】 請求項1において、前記フィルタと前記発熱体との間に、酸化触媒を担持した触媒担体を配設したことを特徴とする内燃機関の排気微粒子浄化装置。 2. The method of claim 1, between the heating element and the filter, exhaust particulate purifying apparatus for an internal combustion engine, characterized in that arranged the catalyst carrier carrying the oxidation catalyst.
  3. 【請求項3】 請求項1又は請求項2のいずれか1項記載の内燃機関の排気微粒子浄化装置において、前記発熱体が電気ヒータと該電気ヒータ周りに配置された燃料吸収部材とからなり、前記電気ヒータと前記燃料吸収部材とが絶縁されていることを特徴とする内燃機関の排気微粒子浄化装置。 3. A exhaust particulate purifying apparatus according to claim 1 or an internal combustion engine of any one of claims 2, consists of a fuel absorbing member to which the heating element is arranged around the electric heater and the electric heater, exhaust particulate purification system of an internal combustion engine, characterized in that said electric heater and the fuel absorbing member is insulated.
  4. 【請求項4】 請求項1又は請求項2のいずれか1項記載の内燃機関の排気微粒子浄化装置において、前記発熱体が導電性の燃料吸収部材からなり、該燃料吸収部材自身に通電することにより、該燃料吸収部材全体が発熱することを特徴とする内燃機関の排気微粒子浄化装置。 4. A exhaust particulate purifying apparatus according to claim 1 or an internal combustion engine of any one of claims 2, that the heating element is made of a conductive fuel absorbing member, energizing the fuel absorbing member itself Accordingly, exhaust particulate purifying apparatus for an internal combustion engine, characterized in that the entire fuel absorbing member generates heat.
  5. 【請求項5】 請求項1ないし請求項4のいずれか1項記載の内燃機関の排気微粒子浄化装置において、前記排気管路中に間隔をあけて前記発熱体を互い違いに複数列配置したことを特徴とする内燃機関の排気微粒子浄化装置。 5. The exhaust particulate purifying apparatus according to claim 1 to an internal combustion engine of any one of claims 4, that it has a plurality of rows staggered to the heating element at intervals in the exhaust pipe exhaust particulate purification system of an internal combustion engine, characterized.
  6. 【請求項6】 請求項1ないし請求項5のいずれか1項記載の内燃機関の排気微粒子浄化装置において、前記発熱体を構成する部材に酸化触媒を担持させたことを特徴とする内燃機関の排気微粒子浄化装置。 6. The exhaust particulate purification apparatus for an internal combustion engine according to any one of claims 1 to 5, for an internal combustion engine, characterized in that by supporting an oxidation catalyst on the member constituting the heating element exhaust particulate emission control device.
  7. 【請求項7】 請求項1ないし請求項6のいずれか1項記載の内燃機関の排気微粒子浄化装置において、排気中の微粒子を捕集するための前記フィルタに酸化触媒を担持したことを特徴とする内燃機関の排気微粒子浄化装置。 7. The exhaust particulate purification apparatus for an internal combustion engine according to any one of claims 1 to 6, and characterized by carrying an oxidation catalyst on the filter for trapping particulate in the exhaust gas exhaust particulate purification system of an internal combustion engine to be.
JP12956596A 1996-05-24 1996-05-24 Exhaust particulate purifier for internal combustion engine Withdrawn JPH09317440A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774422A1 (en) * 1998-02-02 1999-08-06 Peugeot Assisted particle filter regeneration for diesel engine
EP1211393A1 (en) * 2000-11-22 2002-06-05 O-DEN Corporation Diesel particulate removing apparatus
WO2003048537A1 (en) * 2001-11-28 2003-06-12 Robert Bosch Gmbh Method for operating an internal combustion engine and internal combustion engine
WO2004101965A1 (en) * 2003-05-06 2004-11-25 Catalytica Energy Systems, Inc. System and methods for improved emission control of internal combustion engines using pulsed fuel flow
EP1517011A2 (en) * 2003-09-22 2005-03-23 J. Eberspächer GmbH & Co. KG Exhaust gas apparatus with particle filter, heater arrangement and method of regeneration
WO2006023091A2 (en) * 2004-08-02 2006-03-02 Catalytica Energy Systems, Inc. Pre-combustors for internal combustion engines and systems and methods therefor
JP2006274806A (en) * 2005-03-28 2006-10-12 Toyota Motor Corp Exhaust emission control device of internal combustion engine
US7165393B2 (en) 2001-12-03 2007-01-23 Catalytica Energy Systems, Inc. System and methods for improved emission control of internal combustion engines
US7181906B2 (en) 2002-11-15 2007-02-27 Catalytica Energy Systems, Inc. Devices and methods for reduction of NOx emissions from lean burn engines
FR2896533A1 (en) * 2006-01-26 2007-07-27 Renault Sas Internal combustion engine`s exhaust line for motor vehicle, has fuel injector arranged so as to orient fuel jet in direction of vaporization surface, where surface presents temperature equal to evaporation temperature of injected fuel
FR2897641A1 (en) * 2006-02-20 2007-08-24 Renault Sas Particle filter regenerating method for e.g. diesel type internal combustion engine, involves increasing temperature of exhaust gas at inlet of oxidation catalyst during idle phase of engine and regeneration of filter
FR2902455A1 (en) * 2006-06-20 2007-12-21 Renault Sas Pollutant gas e.g. nitrogen oxide, treating system for vehicle, has fuel injector injecting fuel directly on downstream side of catalytic device and situated in outlet of device, where side is deprived of inactive catalytic material
FR2905977A3 (en) * 2006-09-19 2008-03-21 Renault Sas Exhaust duct for motor vehicle, has injecting nozzle situated at level of central axis of duct, where nozzle is in circular shape around axis of duct in manner that injected fuel jet presents rotational symmetry around axis
FR2906838A1 (en) * 2006-10-09 2008-04-11 Renault Sas The exhaust line provided with a fuel injector and homogenizing exhaust gas means.
FR2912461A3 (en) * 2007-02-09 2008-08-15 Renault Sas Exhaust gas treating system for oil engine of motor vehicle, has deflector arranged between hydrocarbon injector and oxidation catalyst, and directing hydrocarbon stream towards peripheral zones of inlet section of oxidation catalyst
JP2008255821A (en) * 2007-04-02 2008-10-23 Hino Motors Ltd Exhaust gas post-processor for internal combustion engine
FR2922593A3 (en) * 2007-10-22 2009-04-24 Renault Sas Exhaust line for e.g. oil engine, of motor vehicle, has injector distributing fuel jet that is oriented so that peripheral portion is intercepted by deflectors and evacuated via main duct, and central portion is evacuated via secondary duct
FR2925583A3 (en) * 2007-12-21 2009-06-26 Renault Sas Exhaust gas depolluting device for internal combustion engine, has heating unit with metallic element accumulating heat from exhaust gas and metallic conducting bar connected to element and reducing agent pulverization target
FR2929326A1 (en) * 2008-03-26 2009-10-02 Renault Sas Vaporization device for particle filter regeneration device of combustion engine, has strips having surfaces formed in plane that forms angle such that displacement of injected fuel flow is carried out to modify orientation of axis of flow
JP2010248943A (en) * 2009-04-13 2010-11-04 Isuzu Motors Ltd Exhaust gas temperature raising device
US20110126516A1 (en) * 2007-08-14 2011-06-02 Shawn Michael Gallagher System and Method for Removing Particulate Matter from a Diesel Particulate Filter
US8006484B2 (en) 2005-02-14 2011-08-30 Eaton Corporation Systems and methods for reducing emissions of internal combustion engines using a fuel processor bypass
WO2012022762A1 (en) * 2010-08-20 2012-02-23 Emitec Gesellschaft Für Emissionstechnologie Mbh Method and apparatus for exhaust-gas treatment
JP2012122353A (en) * 2010-12-06 2012-06-28 Ngk Spark Plug Co Ltd Exhaust gas heating system
WO2014141903A1 (en) 2013-03-15 2014-09-18 エヌ・イーケムキャット株式会社 Oxidation catalyst and exhaust gas purification device using same

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774422A1 (en) * 1998-02-02 1999-08-06 Peugeot Assisted particle filter regeneration for diesel engine
EP1211393A1 (en) * 2000-11-22 2002-06-05 O-DEN Corporation Diesel particulate removing apparatus
US6953555B2 (en) 2000-11-22 2005-10-11 O-Den Corporation Diesel particulate removing apparatus
WO2003048537A1 (en) * 2001-11-28 2003-06-12 Robert Bosch Gmbh Method for operating an internal combustion engine and internal combustion engine
US7165393B2 (en) 2001-12-03 2007-01-23 Catalytica Energy Systems, Inc. System and methods for improved emission control of internal combustion engines
US7082753B2 (en) 2001-12-03 2006-08-01 Catalytica Energy Systems, Inc. System and methods for improved emission control of internal combustion engines using pulsed fuel flow
US7610752B2 (en) 2002-11-15 2009-11-03 Eaton Corporation Devices and methods for reduction of NOx emissions from lean burn engines
US7181906B2 (en) 2002-11-15 2007-02-27 Catalytica Energy Systems, Inc. Devices and methods for reduction of NOx emissions from lean burn engines
WO2004101965A1 (en) * 2003-05-06 2004-11-25 Catalytica Energy Systems, Inc. System and methods for improved emission control of internal combustion engines using pulsed fuel flow
EP1517011A3 (en) * 2003-09-22 2005-12-14 J. Eberspächer GmbH & Co. KG Exhaust gas apparatus with particle filter, heater arrangement and method of regeneration
EP1517011A2 (en) * 2003-09-22 2005-03-23 J. Eberspächer GmbH & Co. KG Exhaust gas apparatus with particle filter, heater arrangement and method of regeneration
WO2006023091A2 (en) * 2004-08-02 2006-03-02 Catalytica Energy Systems, Inc. Pre-combustors for internal combustion engines and systems and methods therefor
US7240483B2 (en) 2004-08-02 2007-07-10 Eaton Corporation Pre-combustors for internal combustion engines and systems and methods therefor
WO2006023091A3 (en) * 2004-08-02 2006-08-17 Catalytica Energy Sys Inc Pre-combustors for internal combustion engines and systems and methods therefor
US8006484B2 (en) 2005-02-14 2011-08-30 Eaton Corporation Systems and methods for reducing emissions of internal combustion engines using a fuel processor bypass
JP2006274806A (en) * 2005-03-28 2006-10-12 Toyota Motor Corp Exhaust emission control device of internal combustion engine
FR2896533A1 (en) * 2006-01-26 2007-07-27 Renault Sas Internal combustion engine`s exhaust line for motor vehicle, has fuel injector arranged so as to orient fuel jet in direction of vaporization surface, where surface presents temperature equal to evaporation temperature of injected fuel
FR2897641A1 (en) * 2006-02-20 2007-08-24 Renault Sas Particle filter regenerating method for e.g. diesel type internal combustion engine, involves increasing temperature of exhaust gas at inlet of oxidation catalyst during idle phase of engine and regeneration of filter
WO2007096541A3 (en) * 2006-02-20 2007-10-11 Renault Sa Method and device for regenerating the particle filter of a diesel-type internal combustion engine during the idling phases
FR2902455A1 (en) * 2006-06-20 2007-12-21 Renault Sas Pollutant gas e.g. nitrogen oxide, treating system for vehicle, has fuel injector injecting fuel directly on downstream side of catalytic device and situated in outlet of device, where side is deprived of inactive catalytic material
FR2905977A3 (en) * 2006-09-19 2008-03-21 Renault Sas Exhaust duct for motor vehicle, has injecting nozzle situated at level of central axis of duct, where nozzle is in circular shape around axis of duct in manner that injected fuel jet presents rotational symmetry around axis
FR2906838A1 (en) * 2006-10-09 2008-04-11 Renault Sas The exhaust line provided with a fuel injector and homogenizing exhaust gas means.
WO2008043932A1 (en) * 2006-10-09 2008-04-17 Renault S.A.S. Exhaust line fitted with a fuel injector and means for homogenizing burnt gases
FR2912461A3 (en) * 2007-02-09 2008-08-15 Renault Sas Exhaust gas treating system for oil engine of motor vehicle, has deflector arranged between hydrocarbon injector and oxidation catalyst, and directing hydrocarbon stream towards peripheral zones of inlet section of oxidation catalyst
JP2008255821A (en) * 2007-04-02 2008-10-23 Hino Motors Ltd Exhaust gas post-processor for internal combustion engine
US8468809B2 (en) * 2007-08-14 2013-06-25 General Electric Company System and method for removing particulate matter from a diesel particulate filter
US20110126516A1 (en) * 2007-08-14 2011-06-02 Shawn Michael Gallagher System and Method for Removing Particulate Matter from a Diesel Particulate Filter
FR2922593A3 (en) * 2007-10-22 2009-04-24 Renault Sas Exhaust line for e.g. oil engine, of motor vehicle, has injector distributing fuel jet that is oriented so that peripheral portion is intercepted by deflectors and evacuated via main duct, and central portion is evacuated via secondary duct
FR2925583A3 (en) * 2007-12-21 2009-06-26 Renault Sas Exhaust gas depolluting device for internal combustion engine, has heating unit with metallic element accumulating heat from exhaust gas and metallic conducting bar connected to element and reducing agent pulverization target
FR2929326A1 (en) * 2008-03-26 2009-10-02 Renault Sas Vaporization device for particle filter regeneration device of combustion engine, has strips having surfaces formed in plane that forms angle such that displacement of injected fuel flow is carried out to modify orientation of axis of flow
JP2010248943A (en) * 2009-04-13 2010-11-04 Isuzu Motors Ltd Exhaust gas temperature raising device
WO2012022762A1 (en) * 2010-08-20 2012-02-23 Emitec Gesellschaft Für Emissionstechnologie Mbh Method and apparatus for exhaust-gas treatment
JP2012122353A (en) * 2010-12-06 2012-06-28 Ngk Spark Plug Co Ltd Exhaust gas heating system
WO2014141903A1 (en) 2013-03-15 2014-09-18 エヌ・イーケムキャット株式会社 Oxidation catalyst and exhaust gas purification device using same

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