JP2009030613A - 内燃機関の空燃比制御装置 - Google Patents
内燃機関の空燃比制御装置 Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 266
- 238000002485 combustion reaction Methods 0.000 title claims description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 107
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 64
- 230000006866 deterioration Effects 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 23
- 230000007423 decrease Effects 0.000 claims description 4
- 230000004043 responsiveness Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 26
- 238000002347 injection Methods 0.000 description 16
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- 238000000746 purification Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
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- 239000000498 cooling water Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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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
- 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
- F02D41/1456—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 with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- 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
-
- 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
- F01N13/0093—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 the purifying devices are of the same type
-
- 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
- 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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- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2454—Learning of the air-fuel ratio 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
- F02D41/14—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
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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
- F02D41/1401—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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1422—Variable gain or coefficients
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
【解決手段】エンジン10の排気管13には上流側触媒15及び下流側触媒16が配設され、上流側触媒15の上流側、上流側触媒15と下流側触媒16との間、下流側触媒16の下流側にはそれぞれ第1,第2,第3空燃比センサ21〜23が配設されている。エンジンECU30は、第1空燃比センサ21の出力値に基づいて実空燃比を目標空燃比に一致させるようF/B制御を実施する。また、第2,第3空燃比センサ22,23の各出力値に基づいて下流側触媒16の内部空燃比に対応付けたサブF/Bパラメータを算出し、そのサブF/Bパラメータを用いてF/B制御における制御パラメータを補正する。
【選択図】 図1
Description
以下、本発明を具体化した第1の実施の形態を図面に従って説明する。本実施の形態では、多気筒内燃機関である車載4気筒ガソリンエンジンを対象にエンジン制御システムを構築し、当該制御システムにおいてエンジン制御用電子制御ユニット(以下、エンジンECUという)を中枢として燃料噴射量の制御や点火時期の制御等を実施することとしている。先ずは、図1を用いて本制御システムの主要な構成を説明する。
仮想センサ出力=k1×第2センサ出力+k2×第3センサ出力
としている。
上記実施の形態では、排気管13に上流側及び下流側の2つの触媒装置15,16を設け、それら各触媒装置15,16の前後に第1〜第3空燃比センサ21〜23を配置した制御システムについて説明したが、本実施の形態では、上流側触媒装置15の前後に2つの空燃比センサを配置した制御システムについて説明する。
仮想センサ出力=k1×第1センサ出力+k2×第1センサ出力
としている。
Claims (9)
- 内燃機関の排気通路の上流側及び下流側にそれぞれ配設された上流側触媒装置及び下流側触媒装置と、
前記排気通路において上流側触媒装置の上流側、上流側触媒装置と下流側触媒装置との間、下流側触媒装置の下流側にそれぞれ配設され排気の空燃比を検出する第1,第2及び第3空燃比センサと、
前記第1空燃比センサにより検出される実空燃比が目標空燃比となるようにフィードバック制御を実施する第1フィードバック制御手段と、
前記第2空燃比センサと前記第3空燃比センサにより検出される各空燃比に基づいて一つのフィードバック制御手段により、前記第1フィードバック制御手段の制御パラメータを補正する第2フィードバック制御手段と、
を備えることを特徴とする内燃機関の空燃比制御装置。 - 前記第2フィードバック制御手段は、前記第2空燃比センサと前記第3空燃比センサで各々検出される空燃比に基づいて各センサ間の仮想空燃比を算出し、該仮想空燃比により前記第1フィードバック制御手段の制御パラメータを補正する請求項1に記載の内燃機関の空燃比制御装置。
- 前記第2フィードバック制御手段は、前記第2空燃比センサにより検出される空燃比と前記第3空燃比センサにより検出される空燃比とに所定の重み付けを行い前記第1フィードバック制御手段の制御パラメータを補正することを特徴とする請求項1又は2に記載の内燃機関の空燃比制御装置。
- 内燃機関の運転状態を検出する運転状態検出手段を備え、
前記第2フィードバック制御手段は、前記運転状態検出手段により検出される運転状態に基づいて前記第2空燃比センサにより検出される空燃比と前記第3空燃比センサにより検出される空燃比とに対する重み付けを設定することを特徴とする請求項3に記載の内燃機関の空燃比制御装置。 - 前記運転状態検出手段は、排気流量を検出する排気流量検出手段を含み、
前記第2フィードバック制御手段は、前記排気流量検出手段により検出される排気流量に基づいて前記第2空燃比センサにより検出される空燃比と前記第3空燃比センサにより検出される空燃比とに対する重み付けを設定することを特徴とする請求項4に記載の内燃機関の空燃比制御装置。 - 前記第2フィードバック制御手段は、排気流量が大きいほど、前記第2空燃比センサにより検出される空燃比に対する重み付けを小さくし、前記第3空燃比センサにより検出される空燃比に対する重み付けを大きくすることを特徴とする請求項5に記載の内燃機関の空燃比制御装置。
- 前記運転状態検出手段は、前記上流側触媒装置の劣化度合を検出する劣化検出手段を含み、
前記第2フィードバック制御手段は、前記劣化検出手段により検出される前記上流側触媒装置の劣化度合に基づいて前記第2空燃比センサにより検出される空燃比と前記第3空燃比センサにより検出される空燃比とに対する重み付けを設定することを特徴とする請求項3乃至請求項6のいずれか一つに記載の内燃機関の空燃比制御装置。 - 前記第2フィードバック制御手段は、前記上流側触媒装置の劣化度合が大きいほど、前記第2空燃比センサにより検出される空燃比に対する重み付けを小さくし、前記第3空燃比センサにより検出される空燃比に対する重み付けを大きくすることを特徴とする請求項7記載の内燃機関の空燃比制御装置。
- 前記第2フィードバック制御手段は、前記第2空燃比センサにより検出される空燃比を入力、前記第3空燃比センサにより検出される空燃比を出力としたモデルを用い、該モデルの状態推定器により入力から出力の間の状態量を推定して前記第1フィードバック制御手段の制御パラメータを補正することを特徴とする請求項1記載の内燃機関の空燃比制御装置。
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JP2008261334A JP4366701B2 (ja) | 2003-12-26 | 2008-10-08 | 内燃機関の空燃比制御装置 |
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JP2004137581A Division JP4269281B2 (ja) | 2003-12-26 | 2004-05-06 | 内燃機関の空燃比制御装置 |
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JP2009030613A true JP2009030613A (ja) | 2009-02-12 |
JP4366701B2 JP4366701B2 (ja) | 2009-11-18 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011152509A1 (ja) * | 2010-06-04 | 2011-12-08 | 日立オートモティブシステムズ株式会社 | エンジンの制御装置 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102005016075B4 (de) * | 2005-04-08 | 2007-04-12 | Audi Ag | Verfahren zur Diagnose einer dem Abgaskatalysator einer Brennkraftmaschine zugeordneten Lambdasonde |
JP4631517B2 (ja) * | 2005-04-13 | 2011-02-16 | トヨタ自動車株式会社 | 酸素センサ及び空燃比制御システム |
US20080190099A1 (en) * | 2006-12-20 | 2008-08-14 | Aleksey Yezerets | System and method for inhibiting uncontrolled regeneration of a particulate filter for an internal combustion engine |
US7818993B2 (en) * | 2007-09-27 | 2010-10-26 | Uchicago Argonne, Llc | High-performance flexible hydrogen sensors |
DE102011013392A1 (de) * | 2011-03-09 | 2012-09-13 | Daimler Ag | Verfahren zur Regelung eines Verbrennungsmotors |
CN104110294B (zh) * | 2014-07-23 | 2016-06-08 | 金龙联合汽车工业(苏州)有限公司 | 一种用于汽车scr系统的温度控制装置及其控制方法 |
DE102015216830A1 (de) * | 2015-09-03 | 2017-03-09 | Volkswagen Aktiengesellschaft | Verfahren sowie Vorrichtung zur Abgasnachbehandlung einer Brennkraftmaschine |
JP6361699B2 (ja) * | 2016-07-06 | 2018-07-25 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP2019157755A (ja) | 2018-03-13 | 2019-09-19 | 株式会社デンソー | 制御装置 |
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JP3344040B2 (ja) * | 1993-11-25 | 2002-11-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JPH0886238A (ja) * | 1994-09-16 | 1996-04-02 | Honda Motor Co Ltd | 内燃機関の空燃比制御装置 |
JP4265704B2 (ja) * | 1999-04-14 | 2009-05-20 | 本田技研工業株式会社 | 内燃機関の空燃比制御装置及びプラントの制御装置 |
JP3838318B2 (ja) * | 1999-06-04 | 2006-10-25 | 日産自動車株式会社 | エンジンの空燃比制御装置 |
US6256981B1 (en) * | 1999-08-10 | 2001-07-10 | Chrysler Corporation | Fuel control system with multiple oxygen sensors |
JP2001075527A (ja) * | 1999-09-01 | 2001-03-23 | Sharp Corp | 表示装置 |
JP3672081B2 (ja) * | 1999-10-29 | 2005-07-13 | 株式会社デンソー | 内燃機関の排ガス浄化装置 |
US6539707B2 (en) * | 2000-10-03 | 2003-04-01 | Denso Corporation | Exhaust emission control system for internal combustion engine |
JP4032840B2 (ja) * | 2002-06-18 | 2008-01-16 | 株式会社デンソー | 内燃機関の排出ガス浄化装置 |
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2004
- 2004-12-27 US US11/020,569 patent/US20060021325A1/en not_active Abandoned
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