JP6121402B2 - 低圧EGRを備えたディーゼルエンジンのNOx吸蔵触媒コンバータを再生する方法 - Google Patents
低圧EGRを備えたディーゼルエンジンのNOx吸蔵触媒コンバータを再生する方法 Download PDFInfo
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- 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
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- 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
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
-
- 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
- F01N2240/00—Combination 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
- F01N2240/36—Combination 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 exhaust flap
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- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/0022—Controlling intake air for diesel engines by throttle control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
- F02D41/028—Desulfurisation of NOx traps or adsorbent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
λ<1(例えば0.9)は、「空気の不足」、すなわちリッチ混合気を意味し、
λ>1(例えば1.1)は、「空気の過剰」、すなわちリーン混合気を意味する。
− エンジンおよびシステムの調節装置を制御するユニット(ECU)、
− 吸気を絞る装置(11)、
− 空燃比を検出する第1センサ(12)、
− 窒素酸化物吸蔵触媒コンバータ(5)、
− 粒子フィルタ(6)と、
− 空燃比を検出する第2センサ(13)、
− 低圧EGR弁(9)を備える低圧ERGライン(14)、
− 任意選択的に、排ガスの排出を低減する装置(10)。
・窒素酸化物吸蔵触媒コンバータの脱硫中のH2S遮断触媒コンバータにおけるH2Sの吸収、
・例えば、エンジンの冷間始動中、または窒素酸化物吸蔵触媒コンバータあるいは粒子フィルタの再生中の炭化水素吸蔵材または酸化触媒コンバータにおける、炭化水素の吸収、
・効率的な排ガス浄化に対して窒素酸化物吸蔵触媒コンバータ(5)のNOx吸蔵作用がもはや十分でない、特に排ガス温度が上昇したエンジン動作点におけるNOx転化のさらなる改善を達成するための、例えばSCR触媒コンバータまたは窒素酸化物吸蔵触媒コンバータにおける窒素酸化物の吸収、
・窒素酸化物吸蔵触媒コンバータの再生中に形成されるアンモニアを取り込むための、例えばSCR触媒コンバータにおけるアンモニアの吸収。
・再生中のより低い燃料消費
・再生が可能であるさらなる運転状態。
・再生中の発熱の発生の低減、および結果としての再生後の窒素酸化物吸蔵触媒コンバータの改善された吸蔵挙動
・再生の開始時のNOx脱離ピークの低減、それは、脱離したNOxが、低圧EGRシステムを介して窒素酸化物吸蔵触媒コンバータを横切って複数回導かれ、その後、リッチ状態に還元されるためである。
・N2Oがリッチ運転条件下で窒素酸化物吸蔵触媒コンバータを横切って複数回導かれる結果としての、再生中のN2Oの低減。
・NOxが窒素酸化物吸蔵触媒コンバータを横切って複数回還元されてNH3を形成する可能性の結果としての高いNH3収率。
・還元剤のより効率的な利用の結果としての再生中の炭化水素およびCO排出量の低減。
2.オーバーラン運転が存在する時、DPF再生中に脱硫を行うことができる。
3.脱硫は、エンジンのさらなる運転状態で発生することができる。
4.低圧EGRにおける排ガスをリッチ状態に設定するためにわずかな量の燃料のみが必要であるため、脱硫中に燃料消費が大幅に低減すること。
5.リッチ段階が長期化し、したがって、触媒コンバータの経年化に決定的なリッチ/リーンの交代が低減する結果として、NOx吸蔵触媒コンバータの熱劣化が低減すること。
6.脱硫中のオイル希釈効果が低減すること。
7.例えば運転の快適さ、排出物およびオイル希釈の理由で通常の走行動作では困難なしには実施可能でない、リッチ条件下でのより長い期間の走行が可能であることによる、より効率的な脱硫。
2 シリンダ
3 排気システム
4 吸気システム
5 NOx吸蔵触媒コンバータ
6 粒子フィルタ
7 任意選択的な触媒コンバータ
8 任意選択的な触媒コンバータ((10)の下流に配置することも可能である)
9 低圧EGR弁
10 排気フラップ
11 スロットルフラップ
12 空燃比を検出するセンサ、例えばラムダセンサ
13 空燃比を検出するセンサ、例えばラムダセンサまたはNOxセンサ((5)または(7)の下流に配置することも可能である)
14 低圧EGRライン
15 高圧EGRライン
16 高圧EGR弁
17 ターボチャージャ用のコンプレッサ
18 ターボチャージャのタービン
Claims (6)
- 車両のリーンバーンエンジン(1)の排気ライン(3)に配置される窒素酸化物吸蔵触媒コンバータ(5)を再生する方法であって、前記エンジン(1)に低圧排ガス再循環用の装置が設けられ、前記エンジン(1)が、低圧EGRライン(14)における低圧EGR弁(9)、ならびに排ガス排出を低減する装置(10)および/または吸気を低減する装置(11)とともに配置される、方法において、
前記再生が、前記エンジンのエンジンブレーキ運転中に、前記吸気を低減する装置(11)による前記吸気の絞りおよび/または前記排ガス排出を低減する装置(10)による前記排ガスの前記排出の低減によって、前記排ガスが、実質的に、始動している前記エンジン(1)および前記窒素酸化物吸蔵触媒コンバータ(5)を介して前記低圧EGR弁(9)を通る回路内で導かれるように開始され、この間、1以下のラムダ値に対応する空気−燃料混合が設定され、
前記エンジンのエンジンブレーキ運転が、前記車両の慣性質量または重力質量の作用下で発生することを特徴とする方法。 - 前記低圧EGR弁(9)が、前記再生中に完全に開いていることを特徴とする、請求項1に記載の方法。
- 前記再生中、0.8から1のラムダ値に対応する空気−燃料混合が維持されることを特徴とする、請求項1又は2に記載の方法。
- 前記車両のGPSデータセンサまたは距離センサを使用して、前記エンジンの前記エンジンブレーキ運転の開始および終了を予測することを特徴とする、請求項1〜3のいずれか一項に記載の方法。
- 前記窒素酸化物吸蔵触媒コンバータ(5)の前記再生が、前記窒素酸化物吸蔵触媒コンバータにおいて150℃と500℃との間の温度で行われることを特徴とする、請求項1〜4のいずれか一項に記載の方法。
- 前記窒素酸化物吸蔵触媒コンバータ(5)の前記再生が、前記窒素酸化物吸蔵触媒コンバータにおいて500℃を超える温度で行われることを特徴とする、請求項1〜5のいずれか一項に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011101079.7A DE102011101079B4 (de) | 2011-05-10 | 2011-05-10 | Verfahren zur Regeneration von NOx-Speicherkatalysatoren von Dieselmotoren mit Niederdruck-AGR |
DE102011101079.7 | 2011-05-10 | ||
PCT/EP2012/058547 WO2012152833A1 (en) | 2011-05-10 | 2012-05-09 | Method for regenerating nox storage catalytic converters of diesel engines with low-pressure egr |
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JP2014517892A JP2014517892A (ja) | 2014-07-24 |
JP6121402B2 true JP6121402B2 (ja) | 2017-04-26 |
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JP2014509718A Active JP6121402B2 (ja) | 2011-05-10 | 2012-05-09 | 低圧EGRを備えたディーゼルエンジンのNOx吸蔵触媒コンバータを再生する方法 |
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US (1) | US9482128B2 (ja) |
EP (1) | EP2707585B1 (ja) |
JP (1) | JP6121402B2 (ja) |
KR (1) | KR101921885B1 (ja) |
DE (1) | DE102011101079B4 (ja) |
WO (1) | WO2012152833A1 (ja) |
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JP5472318B2 (ja) * | 2009-12-08 | 2014-04-16 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム |
DE102011107692B3 (de) | 2011-07-13 | 2013-01-03 | Umicore Ag & Co. Kg | Verfahren zur Reaktivierung von Abgasreinigungsanlagen von Dieselmotoren mit Niederdruck-AGR |
DE102011111590A1 (de) * | 2011-08-25 | 2013-02-28 | Volkswagen Aktiengesellschaft | Abgasbehandlungseinrichtung, Verfahren zur Aufbereitung von Abgas und Kraftfahrzeug |
US8997461B2 (en) | 2012-05-21 | 2015-04-07 | Cummins Emission Solutions Inc. | Aftertreatment system having two SCR catalysts |
DE102013205541A1 (de) * | 2012-07-30 | 2014-05-15 | Ford Global Technologies, Llc | Verfahren zum Betrieb eines Verbrennungsmotors, Verfahren zum Ausschalten eines Verbrennungsmotors und Motorsteuervorrichtung |
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KR20140027397A (ko) | 2014-03-06 |
DE102011101079A1 (de) | 2012-11-15 |
KR101921885B1 (ko) | 2018-11-26 |
EP2707585B1 (en) | 2019-10-16 |
US9482128B2 (en) | 2016-11-01 |
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