JP2019167865A - 排気浄化システムの劣化診断装置 - Google Patents
排気浄化システムの劣化診断装置 Download PDFInfo
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- 239000007924 injection Substances 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 claims description 40
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 239000003054 catalyst Substances 0.000 description 8
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- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
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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
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- 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
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
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- B01D—SEPARATION
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- 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
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
- B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- 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
- B01D53/9495—Controlling the catalytic process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- 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
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- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
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- B01D2258/012—Diesel engines and lean burn gasoline engines
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- 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
- 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
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- 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
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1812—Flow rate
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- 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
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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
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Abstract
Description
内燃機関から排気管に排出された排気ガスを浄化する排気浄化システムの劣化診断装置であって、
前記排気ガスの温度と、排気管内に噴射される還元剤の噴射量とに基づいて、前記排気浄化システムにおける構成部品の腐食による劣化度を推定する劣化度推定部と、
前記劣化度推定部により推定された前記劣化度が予め定められた閾値を超えるかどうかを判断する判断部と、
前記判断部の判断結果を出力する出力部と、
を備える。
本実施の形態は、自動車に搭載されたディーゼルエンジン(内燃機関)に本発明を適用した場合について説明する。以下、ディーゼルエンジンを、単にエンジンという場合がある。
2 排気管
2a 接続配管
3 DPF
4 尿素SCR触媒(SCR)
5 尿素水噴射装置
5a 尿素水タンク
5b 尿素水ポンプ
5c 尿素水インジェクタ
6 ミキサー
7 制御装置
8 温度センサー
10 エンジン
100 劣化診断装置
101 腐食量推定部
102 判断部
103 出力部
Claims (10)
- 内燃機関から排気管に排出された排気ガスを浄化する排気浄化システムの劣化診断装置であって、
前記排気ガスの温度と、排気管内に噴射される還元剤の噴射量とに基づいて、前記排気浄化システムにおける構成部品の腐食による劣化度を推定する劣化度推定部と、
前記劣化度推定部により推定された前記劣化度が予め定められた閾値を超えるかどうかを判断する判断部と、
前記判断部の判断結果を出力する出力部と、
を備える、排気浄化システムの劣化診断装置。 - 前記劣化度推定部は、前記排気ガスの温度と前記還元剤の単位時間当たりの噴射量とに基づいて、単位時間当たりの劣化度を推定する、
請求項1に記載の排気浄化システムの劣化診断装置。 - 前記劣化度推定部は、前記排気ガスの温度と前記還元剤の単位時間当たりの噴射量とで参照される単位時間当たりの前記劣化度を示すマップを参照して、前記単位時間当たりの劣化度を推定する、
請求項2に記載の排気浄化システムの劣化診断装置。 - 前記劣化度推定部は、前記排気管の壁面温度に基づいて、前記排気ガスの温度を推定する、
請求項1から3のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記劣化度推定部は、前記排気管内を流れる前記排気ガスの流量に基づいて、前記劣化度を補正する、
請求項2から4のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記劣化度推定部は、前記還元剤の温度に基づいて、前記劣化度を補正する、
請求項2から5のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記出力部は、前記判断結果を、前記排気浄化システムを搭載した車両の運転者に報知する報知部に出力する、
請求項1から6のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記出力部は、前記判断結果を、遠隔地に設置された監視センターに通信網を介して通報する通信部に出力する、
請求項1から7のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記構成部品の腐食による劣化度は、前記排気管の腐食量である、
請求項1から8のいずれか一項に記載の排気浄化システムの劣化診断装置。 - 前記構成部品の腐食による劣化度は、前記排気管内に噴射された尿素水と排気管内に流れる排気ガスとの混合を促進するためのミキサーを前記排気管に支持する支持部の腐食量である、
請求項1から9のいずれか一項に記載の排気浄化システムの劣化診断装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2018056008A JP6996382B2 (ja) | 2018-03-23 | 2018-03-23 | 排気浄化システムの劣化診断装置 |
PCT/JP2019/012085 WO2019182112A1 (ja) | 2018-03-23 | 2019-03-22 | 排気浄化システムの劣化診断装置 |
US17/040,554 US11105246B2 (en) | 2018-03-23 | 2019-03-22 | Degradation diagnosis device for exhaust purification system |
CN201980021134.2A CN111886403A (zh) | 2018-03-23 | 2019-03-22 | 废气净化系统的劣化诊断装置 |
DE112019001504.4T DE112019001504T5 (de) | 2018-03-23 | 2019-03-22 | Vorrichtung zur Degradationsdiagnose für Abgasreinigungssystem |
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JP2018056008A JP6996382B2 (ja) | 2018-03-23 | 2018-03-23 | 排気浄化システムの劣化診断装置 |
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JP6996382B2 JP6996382B2 (ja) | 2022-01-17 |
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JP2000064826A (ja) * | 1998-08-19 | 2000-02-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2011247134A (ja) * | 2010-05-25 | 2011-12-08 | Isuzu Motors Ltd | Scrシステム |
JP2012237291A (ja) * | 2011-05-13 | 2012-12-06 | Denso Corp | 還元剤供給装置 |
JP2018021514A (ja) * | 2016-08-03 | 2018-02-08 | いすゞ自動車株式会社 | ミキサユニットおよび排気系 |
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JP2009220033A (ja) | 2008-03-17 | 2009-10-01 | Mitsubishi Fuso Truck & Bus Corp | 排気浄化触媒装置 |
JP4483972B2 (ja) * | 2008-04-14 | 2010-06-16 | トヨタ自動車株式会社 | 排気浄化システムの故障診断装置 |
JP2011220232A (ja) | 2010-04-09 | 2011-11-04 | Ud Trucks Corp | エンジンの排気浄化装置 |
JP5602495B2 (ja) | 2010-05-25 | 2014-10-08 | いすゞ自動車株式会社 | 排気ガス浄化装置 |
JP6136510B2 (ja) * | 2013-04-16 | 2017-05-31 | いすゞ自動車株式会社 | 噴射制御方法及び噴射制御装置 |
JP6459437B2 (ja) * | 2014-11-26 | 2019-01-30 | いすゞ自動車株式会社 | 診断装置及びセンサ |
JP6996382B2 (ja) | 2018-03-23 | 2022-01-17 | いすゞ自動車株式会社 | 排気浄化システムの劣化診断装置 |
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JP2000064826A (ja) * | 1998-08-19 | 2000-02-29 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2011247134A (ja) * | 2010-05-25 | 2011-12-08 | Isuzu Motors Ltd | Scrシステム |
JP2012237291A (ja) * | 2011-05-13 | 2012-12-06 | Denso Corp | 還元剤供給装置 |
JP2018021514A (ja) * | 2016-08-03 | 2018-02-08 | いすゞ自動車株式会社 | ミキサユニットおよび排気系 |
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US11105246B2 (en) | 2021-08-31 |
CN111886403A (zh) | 2020-11-03 |
WO2019182112A1 (ja) | 2019-09-26 |
DE112019001504T5 (de) | 2020-12-24 |
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