JP6708185B2 - 排気浄化システムの制御装置 - Google Patents
排気浄化システムの制御装置 Download PDFInfo
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- JP6708185B2 JP6708185B2 JP2017160333A JP2017160333A JP6708185B2 JP 6708185 B2 JP6708185 B2 JP 6708185B2 JP 2017160333 A JP2017160333 A JP 2017160333A JP 2017160333 A JP2017160333 A JP 2017160333A JP 6708185 B2 JP6708185 B2 JP 6708185B2
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- 238000000746 purification Methods 0.000 title claims description 33
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 191
- 239000003054 catalyst Substances 0.000 claims description 92
- 230000005856 abnormality Effects 0.000 claims description 32
- 238000003745 diagnosis Methods 0.000 claims description 32
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 546
- 239000007789 gas Substances 0.000 description 28
- JCXJVPUVTGWSNB-UHFFFAOYSA-N Nitrogen dioxide Chemical compound O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 19
- 230000007423 decrease Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 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
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
-
- 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
-
- 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
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- 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
-
- 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
- F01N2240/38—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 ozone (O3) generator, e.g. for adding ozone after generation of ozone from air
-
- 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
-
- 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
-
- 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
- F01N2610/06—Adding substances to exhaust gases the substance being in the gaseous form
-
- 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
-
- 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
- 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)
- Organic Chemistry (AREA)
- Toxicology (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
内燃機関(10)の排気通路に設けられ、排気中のNOxを浄化するNOx吸蔵還元型の触媒(21)と、前記排気通路において前記触媒の上流側にオゾンを供給するオゾン供給装置(32,33)と、前記触媒の下流側に設けられ、排気中のNOx量を検出するNOxセンサ(24)とを備える排気浄化システムに適用され、
前記内燃機関が運転状態あり、かつ前記オゾン供給装置によりオゾンが供給されている状態において前記NOxセンサにより検出された検出NOx量を取得するNOx量取得部と、
前記NOx量取得部により取得された前記検出NOx量に基づいて、前記オゾン供給装置によるオゾン供給量制御、及び前記オゾン供給装置の異常診断の少なくともいずれかを実施する制御部と、
を備える。
上記実施形態を例えば次のように変更してもよい。
Claims (7)
- 内燃機関(10)の排気通路に設けられ、排気中のNOxを浄化するNOx吸蔵還元型の触媒(21)と、前記排気通路において前記触媒の上流側にオゾンを供給するオゾン供給装置(32,33)と、前記触媒の下流側に設けられ、排気中のNOx量を検出するNOxセンサ(24)とを備える排気浄化システムに適用され、
前記内燃機関が運転状態であり、かつ前記オゾン供給装置によりオゾンが供給されている状態において前記NOxセンサにより検出された検出NOx量を取得するNOx量取得部と、
前記内燃機関から排出される排気に関する排気情報、及び前記触媒に関する触媒情報の少なくともいずれかに基づいて、前記触媒の下流側に排出されるNOx量を推定NOx量として算出する算出部と、
前記NOx量取得部により取得された検出NOx量と、前記算出部により算出された推定NOx量とを比較し、その比較の結果に基づいて、前記オゾン供給装置によるオゾン供給量制御、及び前記オゾン供給装置の異常診断の少なくともいずれかを実施する制御部と、
を備える排気浄化システムの制御装置。 - 前記算出部は、前記排気情報として、前記内燃機関から排出されるNOx量、排気流量、及び排気温度の少なくともいずれかである排気パラメータを用い、その排気パラメータに基づいて前記推定NOx量を算出する請求項1に記載の排気浄化システムの制御装置。
- 前記算出部は、前記触媒情報として、前記触媒の温度、及び前記触媒に吸蔵されているNOx吸蔵量の少なくともいずれかである触媒パラメータを用い、その触媒パラメータに基づいて前記推定NOx量を算出する請求項1又は2に記載の排気浄化システムの制御装置。
- 前記オゾン供給装置により前記排気通路に供給されているオゾン量を取得するオゾン量取得部を備え、
前記算出部は、前記排気情報及び前記触媒情報の少なくともいずれかと、前記オゾン量取得部により取得されたオゾン量とに基づいて、前記推定NOx量を算出する請求項1乃至3のいずれか1項に記載の排気浄化システムの制御装置。 - 前記制御部は、
前記NOx量取得部により取得された検出NOx量から、前記算出部により算出された推定NOx量を減算した差が所定値よりも小さい場合に、前記オゾン供給装置によるオゾン供給量制御及び前記オゾン供給装置の異常診断のうちオゾン供給量制御を実施し、
前記差が前記所定値よりも大きい場合に、前記オゾン供給装置によるオゾン供給量制御及び前記オゾン供給装置の異常診断のうち異常診断を実施する請求項1乃至4のいずれか1項に記載の排気浄化システムの制御装置。 - 前記制御部は、前記オゾン供給装置によるオゾン供給量が所定の上限値となるまでの範囲内で、当該オゾン供給量を、前記NOx量取得部により取得された前記検出NOx量に基づいて制御するとともに、前記オゾン供給装置によるオゾン供給量が前記上限値であることに基づいて、前記オゾン供給装置の異常診断を実施する請求項1乃至5のいずれか1項に記載の排気浄化システムの制御装置。
- 内燃機関(10)の排気通路に設けられ、排気中のNOxを浄化するNOx吸蔵還元型の触媒(21)と、前記排気通路において前記触媒の上流側にオゾンを供給するオゾン供給装置(32,33)と、前記触媒の下流側に設けられ、排気中のNOx量を検出するNOxセンサ(24)とを備える排気浄化システムに適用され、
前記内燃機関が運転状態であり、かつ前記オゾン供給装置によりオゾンが供給されている状態において前記NOxセンサにより検出された検出NOx量を取得するNOx量取得部と、
前記NOx量取得部により取得された前記検出NOx量に基づいて、前記オゾン供給装置によるオゾン供給量制御、及び前記オゾン供給装置の異常診断の少なくともいずれかを実施する制御部と、
を備え、
前記制御部は、前記オゾン供給装置によるオゾン供給量が所定の上限値となるまでの範囲内で、当該オゾン供給量を、前記NOx量取得部により取得された前記検出NOx量に基づいて制御するとともに、前記オゾン供給装置によるオゾン供給量が前記上限値であることに基づいて、前記オゾン供給装置の異常診断を実施する排気浄化システムの制御装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017160333A JP6708185B2 (ja) | 2017-08-23 | 2017-08-23 | 排気浄化システムの制御装置 |
PCT/JP2018/030876 WO2019039481A1 (ja) | 2017-08-23 | 2018-08-21 | 排気浄化システムの制御装置 |
DE112018004733.4T DE112018004733T5 (de) | 2017-08-23 | 2018-08-21 | Steuervorrichtung für ein Abgasreinigungssystem |
US16/783,251 US20200173328A1 (en) | 2017-08-23 | 2020-02-06 | Controller for exhaust gas purification system |
Applications Claiming Priority (1)
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---|---|---|---|
JP2017160333A JP6708185B2 (ja) | 2017-08-23 | 2017-08-23 | 排気浄化システムの制御装置 |
Publications (3)
Publication Number | Publication Date |
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JP2019039322A JP2019039322A (ja) | 2019-03-14 |
JP2019039322A5 JP2019039322A5 (ja) | 2019-11-14 |
JP6708185B2 true JP6708185B2 (ja) | 2020-06-10 |
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JP2017160333A Expired - Fee Related JP6708185B2 (ja) | 2017-08-23 | 2017-08-23 | 排気浄化システムの制御装置 |
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Country | Link |
---|---|
US (1) | US20200173328A1 (ja) |
JP (1) | JP6708185B2 (ja) |
DE (1) | DE112018004733T5 (ja) |
WO (1) | WO2019039481A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US10865689B2 (en) * | 2018-09-21 | 2020-12-15 | Cummins Inc. | Systems and methods for diagnosis of NOx storage catalyst |
EP4170139B1 (en) * | 2021-10-19 | 2024-05-01 | Volvo Penta Corporation | Method for predicting urea crystal build-up in an engine system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009281290A (ja) * | 2008-05-22 | 2009-12-03 | Toyota Motor Corp | 内燃機関の排気ガス浄化装置 |
JP2010031730A (ja) * | 2008-07-29 | 2010-02-12 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP6515481B2 (ja) * | 2014-10-15 | 2019-05-22 | 株式会社デンソー | オゾン供給装置 |
JP2017160333A (ja) | 2016-03-09 | 2017-09-14 | 旭化成株式会社 | ポリアセタールコポリマー、コポリマーの製造方法、およびポリアセタール樹脂組成物 |
-
2017
- 2017-08-23 JP JP2017160333A patent/JP6708185B2/ja not_active Expired - Fee Related
-
2018
- 2018-08-21 WO PCT/JP2018/030876 patent/WO2019039481A1/ja active Application Filing
- 2018-08-21 DE DE112018004733.4T patent/DE112018004733T5/de active Pending
-
2020
- 2020-02-06 US US16/783,251 patent/US20200173328A1/en not_active Abandoned
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Publication number | Publication date |
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US20200173328A1 (en) | 2020-06-04 |
WO2019039481A1 (ja) | 2019-02-28 |
JP2019039322A (ja) | 2019-03-14 |
DE112018004733T5 (de) | 2020-06-04 |
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