JP2007170383A - 排気ガス後処理装置のモニタ方法および装置 - Google Patents
排気ガス後処理装置のモニタ方法および装置 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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
- 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
- F01N13/009—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 two or more separate purifying devices arranged in series
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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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1402—Exhaust gas composition
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
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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
- F01N3/02—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
- F01N3/025—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 fuel burner or by adding fuel to exhaust
- F01N3/0253—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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- 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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- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
【解決手段】エンジン・ブロック(10)と、少なくとも1つの触媒(60)を有する排気管(20)とを備えた内燃機関(1)の排気ガス後処理装置であって、触媒(60)内においてNOxの還元のために必要とされる反応剤が、注入装置(40)により触媒(60)上流側に注入される、前記排気ガス後処理装置のモニタ方法において、所定の基準運転点において、触媒(60)の流れ方向後方における排気管(20)内のアンモニア感知センサ(80)によりアンモニアの溢流が検出されるまで、還元剤流量が増加される。これにより保証された最適な配量は、最小のアンモニアの溢流における高いNOx転化を可能にし、特に厳しい排ガス基準に関して有利である。
【選択図】図1
Description
本発明の課題はさらに、対応の装置を提供することである。
モニタ・ユニット内において、触媒の瞬間アンモニア吸蔵能力がモニタ・ユニットの特性曲線/特性曲線群ユニット内に記憶可能であるとき、これから、触媒のアンモニア吸蔵能力が排気ガス後処理と関連する他の制御および操作機能に対しても利用可能であるという利点が得られる。
エンジン・ブロック10と、触媒60および触媒60手前における排気ガス内のNOx含有量を決定するためのNOxセンサ30を有する排気管20とを備えた内燃機関1が示されている。NOxセンサ30は、信号ライン31によりモニタ・ユニット110と結合されている。触媒60は、触媒60における温度測定のための温度センサ50を有し、温度センサ50は、信号ライン51により同様にモニタ・ユニット110と結合されている。図示の例においては、触媒60の流れ方向後方の排気管20の内部に他のNOxセンサ70が配置されている。NOxセンサ70は他の信号ライン71によりモニタ・ユニット110と結合されている。排気ガス内のアンモニアを検出するために、さらに、触媒60後方にアンモニア感知センサ80が設けられ、アンモニア感知センサ80は、同様に信号ライン81によりモニタ・ユニット110と結合されている。さらに、図示のように、給気管内に空気センサ100が設けられていてもよく、空気センサ100により、例えば空気量が決定可能である。空気量の評価のために、空気センサ100は信号ライン101によりモニタ・ユニット110と結合されている。
・触媒60の温度経過が、
・空気質量およびNOx濃度から計算されたNOx量が、
・触媒60内におけるNOx転化が、
・検査開始時のアンモニア充填レベルが、および/または
・再生中に供給された還元剤量が
使用されてもよい。さらに、計算のために、内燃機関1のその他の運転変数が使用されてもよい。
10 エンジン・ブロック
20 排気管
30、70 NOxセンサ
31、42、44、51、71、81、101 信号ライン
40 注入装置
41 配量ユニット
43 測定装置
50 温度センサ
60 触媒
80 アンモニア感知センサ
90 粒子フィルタ
100 空気センサ
110 モニタ・ユニット
111 特性曲線/特性曲線群ユニット
Claims (11)
- エンジン・ブロック(10)と、少なくとも1つの触媒(60)を有する排気管(20)とを備えた内燃機関(1)の排気ガス後処理装置であって、触媒(60)内においてNOxの還元のために必要とされる反応剤が、注入装置(40)により触媒(60)上流側に注入される、前記排気ガス後処理装置のモニタ方法において、
所定の基準運転点において、触媒(60)の流れ方向後方における排気管(20)内のアンモニア感知センサ(80)によりアンモニアの溢流が検出されるまで、還元剤流量が増加されること、
を特徴とする排気ガス後処理装置のモニタ方法。 - アンモニアの溢流までの還元剤流量の増加量から、および排気ガス後処理装置のその他の作動パラメータを使用して、この運転点に対する瞬間最大アンモニア吸蔵能力が計算されることを特徴とする請求項1に記載のモニタ方法。
- アンモニア吸蔵能力の計算のために、触媒(60)の温度経過が、および/または空気質量およびNOx濃度から計算されたNOx量が、および/または触媒(60)内におけるNOx転化が、および/または検査開始時のアンモニア充填レベルが、および/または注入装置(40)に付属の測定装置(43)により決定される、再生中に供給された還元剤量が、使用されることを特徴とする請求項2に記載のモニタ方法。
- 瞬間アンモニア吸蔵能力から、充填レベル特性曲線の補正が行われ、この補正が次の検査まで記憶されることを特徴とする請求項1ないし3のいずれかに記載のモニタ方法。
- アンモニア吸蔵能力の検査が、定期的間隔で、および/または好ましい運転点において、実行されることを特徴とする請求項1ないし4のいずれかに記載のモニタ方法。
- 結合または統合排気ガス装置において使用され、その際、粒子フィルタ(90)によりさらに粒子すすのフィルタリングが実行されることを特徴とする、触媒(60)のアンモニア吸蔵能力を決定するために請求項1ないし5のいずれかに記載のモニタ方法を使用する方法。
- 粒子フィルタ(90)の再生のために、はじめに、アンモニア吸蔵体が予め空にされ、再生の終了後に、アンモニア吸蔵体が再び充填されることを特徴とする請求項6に記載の方法。
- エンジン・ブロック(10)と、排気ガス内のNOx含有量を決定するための少なくとも1つのNOxセンサ(30)および少なくとも1つの触媒(60)を有する少なくとも1つの排気管(20)とを備えた内燃機関(1)の排気ガス後処理装置であって、触媒(60)内においてNOxの還元のために必要とされる反応剤が注入装置(40)により触媒(60)上流側に注入可能であり、この場合、NOxセンサ(30)が、並びに触媒(60)の温度測定および給気管内の空気測定のためのその他のセンサが、並びに触媒(60)の流れ方向後方のアンモニア感知センサ(80)が、モニタ・ユニット(110)と結合されている、前記排気ガス後処理装置のモニタ装置において、
モニタ・ユニット(110)において適切に反応剤の過剰配量が開始可能であり、アンモニアの溢流がアンモニア感知センサ(80)により検出可能であり、また触媒(60)に対するアンモニア吸蔵能力が決定可能であること、
を特徴とする排気ガス後処理装置のモニタ装置。 - 排気管(20)が、触媒(60)の流れ方向後方に粒子フィルタ(90)を有することを特徴とする請求項8に記載のモニタ装置。
- モニタ・ユニット(110)において、触媒(60)の瞬間アンモニア吸蔵能力がモニタ・ユニット(110)の特性曲線/特性曲線群ユニット(111)に記憶可能であることを特徴とする請求項8または9に記載のモニタ装置。
- 触媒(60)のアンモニア吸蔵能力の決定機能が、モニタ・ユニット(110)において、ソフトウェアおよび/またはハードウェアとして形成され、および上位のエンジン制御の少なくとも一部の構成部品であることを特徴とする請求項8ないし10のいずれかに記載のモニタ装置。
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DE102005062120.1A DE102005062120B4 (de) | 2005-12-23 | 2005-12-23 | Verfahren und Vorrichtung zur Überwachung eines Abgasnachbehandlungssystems |
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WO2010087369A1 (ja) * | 2009-01-30 | 2010-08-05 | 三菱重工業株式会社 | 排ガス浄化装置 |
WO2011033620A1 (ja) | 2009-09-16 | 2011-03-24 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置及び排気浄化方法 |
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JP2015086834A (ja) * | 2013-11-01 | 2015-05-07 | トヨタ自動車株式会社 | 排気浄化装置の制御方法 |
KR102059602B1 (ko) | 2013-06-28 | 2019-12-26 | 르노 에스.아.에스. | 자동차의 선택적 촉매 환원 시스템을 진단하기 위한 시스템 및 방법 |
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US7886527B2 (en) * | 2007-04-10 | 2011-02-15 | Gm Global Technology Operations, Inc. | Reductant injection control strategy |
DE102008041603A1 (de) * | 2008-08-27 | 2010-03-04 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine mit SCR-Katalysator |
EP2175246B1 (en) * | 2008-10-09 | 2017-07-19 | Sensirion AG | A method for measuring a fluid composition parameter by means of a flow sensor |
DE102008059773A1 (de) | 2008-12-01 | 2010-06-02 | Volkswagen Ag | Verfahren zum Betreiben einer SCR-Katalysatoreinrichtung |
DE102008064606B4 (de) | 2008-12-19 | 2020-03-05 | Volkswagen Ag | Funktionsanpassung einer Abgasreinigungsvorrichtung |
EP2204555B1 (en) * | 2009-01-02 | 2011-08-03 | Sensirion AG | Ammonia storage system |
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Also Published As
Publication number | Publication date |
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FR2895447B1 (fr) | 2013-02-22 |
US20070144151A1 (en) | 2007-06-28 |
FR2895447A1 (fr) | 2007-06-29 |
US8196390B2 (en) | 2012-06-12 |
DE102005062120B4 (de) | 2016-06-09 |
DE102005062120A1 (de) | 2007-06-28 |
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