JP7372440B2 - 触媒劣化診断装置 - Google Patents
触媒劣化診断装置 Download PDFInfo
- Publication number
- JP7372440B2 JP7372440B2 JP2022504899A JP2022504899A JP7372440B2 JP 7372440 B2 JP7372440 B2 JP 7372440B2 JP 2022504899 A JP2022504899 A JP 2022504899A JP 2022504899 A JP2022504899 A JP 2022504899A JP 7372440 B2 JP7372440 B2 JP 7372440B2
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- JP
- Japan
- Prior art keywords
- catalyst
- fuel ratio
- air
- oxygen concentration
- deterioration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003054 catalyst Substances 0.000 title claims description 109
- 230000006866 deterioration Effects 0.000 title claims description 64
- 238000003745 diagnosis Methods 0.000 title claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 99
- 239000001301 oxygen Substances 0.000 claims description 99
- 229910052760 oxygen Inorganic materials 0.000 claims description 99
- 239000000446 fuel Substances 0.000 claims description 61
- 238000011144 upstream manufacturing Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 1
- 239000012041 precatalyst Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Description
以上より、AFR=14.5÷1.025×0.99=14.005となる。
Claims (5)
- エンジン(E)の排気管(19)に設けられる触媒(C)の下流側に設けられる酸素濃度センサ(90)と、前記酸素濃度センサ(90)の出力信号に基づいて前記触媒(C)の劣化度合いを診断する制御部(100)とを有する触媒劣化診断装置において、
前記エンジン(E)に供給する混合気の空燃比を、理論空燃比よりリッチ側およびリーン側に設定した目標空燃比に向けて交互に推移させるパータベーション処理を行うパータベーション手段(105)を備え、
前記制御部(100)は、前記パータベーション処理の最中に、前記目標空燃比および前記酸素濃度センサ(90)の出力信号に基づいて、前記触媒(C)の上流側の空燃比を推測検知し、
前記触媒(C)の上流側の空燃比としてのAFRは、理論空燃比を14.5、劣化度合いを検知するためのパータベーション処理におけるリッチ側またはリーン側への推移の度合いを示す係数をK、前記目標空燃比と前記酸素濃度センサ(90)の出力信号とにより決定される補正係数をHとしたときに、以下の演算式
AFR=14.5÷K×H
によって求められ、
前記触媒(C)の上流側の流入酸素量としてのO2は、1サイクル当たりの空気量をGAIRとしたときに、以下の演算式
O2=GAIR×(1-14.5÷AFR)
によって求められることを特徴とする触媒劣化診断装置。 - (削除)
- 前記補正係数は、前記目標空燃比と前記酸素濃度センサ(90)の出力信号との乖離に対してPID制御を行うことにより算出されることを特徴とする請求項1に記載の触媒劣化診断装置。
- (削除)
- 前記制御部(100)は、流入酸素量を積算することで前記触媒(C)の酸素吸着能力を算出し、前記触媒(C)の劣化状態を診断することを特徴とする請求項1または3に記載の触媒劣化診断装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2020/009530 WO2021176671A1 (ja) | 2020-03-05 | 2020-03-05 | 触媒劣化診断装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
JPWO2021176671A1 JPWO2021176671A1 (ja) | 2021-09-10 |
JPWO2021176671A5 JPWO2021176671A5 (ja) | 2022-11-30 |
JP7372440B2 true JP7372440B2 (ja) | 2023-10-31 |
Family
ID=77613303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2022504899A Active JP7372440B2 (ja) | 2020-03-05 | 2020-03-05 | 触媒劣化診断装置 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7372440B2 (ja) |
CN (1) | CN115244283B (ja) |
BR (1) | BR112022017146A2 (ja) |
WO (1) | WO2021176671A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114962034B (zh) * | 2022-06-08 | 2023-09-22 | 东风汽车集团股份有限公司 | 混动车型发动机宽域氧传感器劣化诊断方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007113528A (ja) | 2005-10-21 | 2007-05-10 | Toyota Motor Corp | 触媒劣化検出方法 |
JP2007309244A (ja) | 2006-05-19 | 2007-11-29 | Mitsubishi Motors Corp | 触媒温度推定装置 |
JP2010159701A (ja) | 2009-01-08 | 2010-07-22 | Toyota Motor Corp | 触媒劣化診断装置 |
WO2017168580A1 (ja) | 2016-03-29 | 2017-10-05 | 本田技研工業株式会社 | 触媒診断装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3228006B2 (ja) * | 1994-06-30 | 2001-11-12 | トヨタ自動車株式会社 | 内燃機関の排気浄化要素劣化検出装置 |
JP4411755B2 (ja) * | 2000-07-17 | 2010-02-10 | 三菱自動車工業株式会社 | 排気浄化触媒の劣化状態診断装置 |
JP2005098205A (ja) * | 2003-09-25 | 2005-04-14 | Toyota Motor Corp | 内燃機関の空燃比制御装置 |
CN100520033C (zh) * | 2006-03-24 | 2009-07-29 | 本田技研工业株式会社 | 催化剂劣化检测装置 |
US8899015B2 (en) * | 2010-03-09 | 2014-12-02 | Toyota Jidosha Kabushiki Kaisha | Catalyst degradation detection device |
JP5606425B2 (ja) * | 2011-11-08 | 2014-10-15 | 三菱電機株式会社 | 内燃機関の制御装置および触媒コンバータの劣化診断方法 |
-
2020
- 2020-03-05 CN CN202080097947.2A patent/CN115244283B/zh active Active
- 2020-03-05 BR BR112022017146A patent/BR112022017146A2/pt unknown
- 2020-03-05 JP JP2022504899A patent/JP7372440B2/ja active Active
- 2020-03-05 WO PCT/JP2020/009530 patent/WO2021176671A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007113528A (ja) | 2005-10-21 | 2007-05-10 | Toyota Motor Corp | 触媒劣化検出方法 |
JP2007309244A (ja) | 2006-05-19 | 2007-11-29 | Mitsubishi Motors Corp | 触媒温度推定装置 |
JP2010159701A (ja) | 2009-01-08 | 2010-07-22 | Toyota Motor Corp | 触媒劣化診断装置 |
WO2017168580A1 (ja) | 2016-03-29 | 2017-10-05 | 本田技研工業株式会社 | 触媒診断装置 |
Also Published As
Publication number | Publication date |
---|---|
BR112022017146A2 (pt) | 2022-10-11 |
JPWO2021176671A1 (ja) | 2021-09-10 |
WO2021176671A1 (ja) | 2021-09-10 |
CN115244283A (zh) | 2022-10-25 |
CN115244283B (zh) | 2023-08-08 |
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