JP6468768B2 - 触媒失活の監視および空燃比の制御のためのシステムおよび方法 - Google Patents
触媒失活の監視および空燃比の制御のためのシステムおよび方法 Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims description 92
- 239000000446 fuel Substances 0.000 title claims description 71
- 238000000034 method Methods 0.000 title claims description 46
- 230000009849 deactivation Effects 0.000 title claims description 23
- 238000012544 monitoring process Methods 0.000 title description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 47
- 229910002091 carbon monoxide Inorganic materials 0.000 description 47
- 230000003197 catalytic effect Effects 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000006855 networking Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000005055 memory storage Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration 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
- 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
- F01N3/101—Three-way catalysts
-
- 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
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- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1452—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a COx content or concentration
- F02D41/1453—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a COx content or concentration the characteristics being a CO content or concentration
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of 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
- 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
-
- 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
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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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
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
- F02D2041/1419—Several control loops, either as alternatives or simultaneous the control loops being cascaded, i.e. being placed in series or nested
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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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D2041/1468—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an ammonia content or concentration of the exhaust gases
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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
-
- 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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Analytical Chemistry (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
105 エンジン
110 三元触媒
115 酸素センサ
120 NH3センサ
125 アンモニアスリップ触媒
130 制御サブシステム
135 触媒監視モジュール
140 モデルベースのCOエスティメータ
145 空燃制御サブシステム
200 エンジンの空燃比を制御するための方法
205 リッチな運転状態での公称NH3濃度値(NH3,nom)を決定するステップ
210 NH3濃度のしきい値T1を決定するステップ
215 CO濃度に対する参照値(COref)を決定するステップ
220 エンジン105をリッチな運転状態で運転するステップ
225 触媒後の実NH3濃度値(NH3,act)を測定して決定するステップ
230 NH3,actがNH3,nomより低いかどうかを判定するステップ
235 CO濃度を推定(COest)するステップ
240 COestがCOrefより大きいかどうかを判定するステップ
245 三元触媒110が失活したことを示すステップ
250 空気燃料混合気をリッチ状態よりわずかにリーン側に調節するステップ
255 NH3,actがT1より小さいかどうかを判定するステップ
Claims (20)
- エンジン(105)の空燃比を制御するための方法(200)であって、
エンジンを作動させるステップと、
前記エンジンからのガス流を生成するステップと、
前記ガス流を三元触媒を通過させ、その後に前記ガス流をNH3センサを通過させるステップと、
前記NH3センサで、前記三元触媒の下流の実NH3濃度値が、リッチな運転状態で生成される公称NH3濃度値より低いかどうかを判定するステップと、
前記実NH3濃度値が、リッチな運転状態で生成される前記公称NH3濃度値より低い場合には、空燃制御サブシステムで推定CO濃度に基づいて前記空燃比を調節するステップと、
を含む、方法。 - 実NH3濃度値が、リッチな運転状態で生成される公称NH3濃度値より低いかどうかを判定するステップが、
リッチな運転状態で生成される前記公称NH3濃度値を決定するステップ(205)と、
前記三元触媒の下流の前記実NH3濃度値を検出するステップ(225)と、
前記三元触媒の下流の前記実NH3濃度値をリッチな運転状態で生成される前記公称NH3濃度値と比較するステップ(230)と、
を含む、請求項1に記載のエンジン(105)の空燃比を制御するための方法(200)。 - 推定CO濃度に基づいて前記空燃比を調節するステップが、
実空燃比を決定するステップ(221)と、
実CO濃度が参照CO濃度より大きいかどうかを判定するステップ(240)と、
前記実CO濃度が前記参照CO濃度より大きい場合、前記空燃比を変更するステップ(250)と、
を含む、請求項1に記載のエンジン(105)の空燃比を制御するための方法(200)。 - 実CO濃度が参照CO濃度より大きいかどうかを判定するステップが、
参照CO濃度値を決定するステップ(215)と、
実CO濃度値を推定するステップ(235)と、
前記実CO濃度値を前記参照CO濃度値と比較するステップ(240)と
を含む、請求項3に記載のエンジン(105)の空燃比を制御するための方法(200)。 - 実CO濃度値を推定するステップが、モデルベースのエスティメータを使用して実CO濃度を計算するステップを含む、請求項4に記載のエンジンの空燃比を制御するための方法(200)。
- 前記空燃比を変更するステップが、前記空燃比を、前記実空燃比よりリーン側の調節された空燃比に調節するステップ(250)を含む、請求項3に記載のエンジン(105)の空燃比を制御するための方法(200)。
- NH3濃度に対してより低いしきい値を決定するステップ(210)と、
三元触媒の下流の前記実NH3濃度をNH3濃度に対する前記より低いしきい値と比較するステップ(230)と、
三元触媒の下流の前記実NH3濃度が、NH3濃度に対する前記より低いしきい値より低い場合、前記空燃比を、前記調節された空燃比よりリッチ側の空燃比に調節するステップ(256)と、
三元触媒の下流の前記実NH3濃度値が、NH3濃度に対する前記より低いしきい値より大きい場合、三元触媒の下流の実NH3濃度値を検出するステップ(225)と、
をさらに含む、請求項6に記載のエンジン(105)の空燃比を制御するための方法(200)。 - エンジンを作動させるステップと、
前記エンジンからのガス流を生成するステップと、
前記ガス流を三元触媒を通過させ、その後に前記ガス流をNH3センサを通過させるステップと、
前記NH3センサで、前記三元触媒の下流の前記ガス流中の実NH3濃度値が、リッチな運転状態で生成される公称NH3濃度値より低いかどうかを判定するステップ(230)と、
前記実NH3濃度値が、リッチな運転状態で生成される前記公称NH3濃度値より低い場合には、推定CO濃度値を決定するステップ(235)と、
前記三元触媒の失活を検出するために、前記推定CO濃度値を参照CO濃度値に比較するステップ(240)と、
前記推定CO濃度値と前記参照CO濃度値との比較に基づいて、1つまたは複数の制御信号を空燃制御サブシステムに送るステップと、
を含み、
前記空燃制御サブシステムは、受け取った前記制御信号に基づいて、空燃比を調整するように構成されている、
触媒の失活を検出する方法。 - 推定CO濃度値を決定するステップ(235)が、モデルベースのエスティメータを使用して推定CO濃度値を決定するステップを含む、請求項8に記載の触媒の失活を検出するための方法。
- 前記モデルベースのエスティメータが、前記三元触媒の物理モデルに基づいたオブザーバを含む、請求項9に記載の触媒の失活を検出するための方法。
- 前記三元触媒の物理モデルに基づいた前記オブザーバが線形オブザーバである、請求項10に記載の触媒の失活を検出するための方法。
- 前記三元触媒の物理モデルに基づいた前記オブザーバが非線形オブザーバである、請求項10に記載の触媒の失活を検出するための方法。
- 前記三元触媒の下流の実NH3濃度値が、リッチな運転状態で生成される公称NH3濃度値より低いかどうかを判定するステップ(230)が、前記三元触媒の下流の時間平均のNH3濃度値が、リッチな運転状態で生成される前記公称NH3濃度値より低いかどうかを判定するステップを含む、請求項8に記載の触媒の失活を検出するための方法。
- 前記1つまたは複数の制御信号は、前記推定CO濃度値が前記参照CO濃度値より大きい場合に、前記三元触媒が失活していることを示す、請求項8に記載の触媒の失活を検出するための方法。
- 三元触媒(110)と、
前記三元触媒の下流に配置されたNH3センサ(120)と、
NH3濃度の測定値をリッチな運転状態での公称NH3濃度値と比較する制御サブシステム(135)と、
NH3濃度の前記測定値および推定CO濃度に基づいて、エンジンの空燃比を調節する空燃制御サブシステム(145)と、
を含む、エンジン(105)の空燃比を制御するためのシステム(100)。 - 前記空燃比を調節する前記サブシステムが、前記三元触媒の下流のCO濃度を推定するサブシステム(140)を含む、請求項15に記載のエンジン(105)の空燃比を制御するためのシステム(100)。
- CO濃度を推定する前記サブシステム(140)が、前記三元触媒の物理モデルに基づくオブザーバを含む、請求項16に記載のエンジン(105)の空燃比を制御するためのシステム(100)。
- 前記オブザーバが線形オブザーバである、請求項17に記載のエンジンの空燃比を制御するためのシステム(100)。
- 前記オブザーバが非線形オブザーバである、請求項17に記載のエンジンの空燃比を制御するためのシステム(100)。
- 前記空燃比を調節する前記サブシステム(145)が、CO濃度の推定値をCO濃度の参照値に比較するサブシステムを含む、請求項15に記載のエンジン(105)の空燃比を制御するためのシステム(100)。
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US10982578B2 (en) * | 2019-01-31 | 2021-04-20 | Hyundai Motor Company | CO clean-up catalyst, after treatment system and after treatment method |
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