JP4100448B1 - 排気ガス浄化方法及び排気ガス浄化システム - Google Patents
排気ガス浄化方法及び排気ガス浄化システム Download PDFInfo
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- JP4100448B1 JP4100448B1 JP2007015854A JP2007015854A JP4100448B1 JP 4100448 B1 JP4100448 B1 JP 4100448B1 JP 2007015854 A JP2007015854 A JP 2007015854A JP 2007015854 A JP2007015854 A JP 2007015854A JP 4100448 B1 JP4100448 B1 JP 4100448B1
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- Prior art keywords
- forced regeneration
- exhaust gas
- differential pressure
- gas purification
- rear differential
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Classifications
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
- B01D46/82—Chemical processes for the removal of the retained particles, e.g. by burning with 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust 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
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
-
- 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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
-
- 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
- F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
- F01N2900/102—Travelling distance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
-
- 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
Abstract
【解決手段】前記前後差圧閾値ΔPsを、基準の前後差圧閾値ΔPs0に対して、前回の強制再生後の車両の走行距離ΔMに応じて段階的又は連続的に変化する係数α(ΔM)を乗じて設定する。
【選択図】図2
Description
10 ディーゼルエンジン(内燃機関)
11 排気通路
12 連続再生型DPF装置
12a 酸化触媒
12b 触媒付きフィルタ
31 差圧センサ
40 制御装置(ECU)
ΔP 前後差圧
ΔPs 前後差圧閾値
ΔPs0 基準の前後差圧閾値
ΔM 前回の強制再生後の車両の走行距離
ΔMs 走行距離閾値
ΔM1 第1走行距離
ΔM2 第2走行距離
ΔV PM堆積量
ΔVa 過剰PM堆積量
ΔVs 強制再生を開始したいPM堆積量
α(c),α(ΔM) 係数
α1,α2,α3,α4 係数値
Claims (6)
- 車両に搭載した内燃機関の排気通路にディーゼルパティキュレートフィルタを有する排気ガス浄化装置を備え、前記ディーゼルパティキュレートフィルタの強制再生開始時期を、前記ディーゼルパティキュレートフィルタの前後差圧と所定の前後差圧閾値との比較に基づいて判断する排気ガス浄化方法において、
前記前後差圧閾値を、前回の強制再生後の車両の走行距離に応じて変化する係数を基準の前後差圧閾値に乗じて設定することを特徴とする排気ガス浄化方法。 - 前後差圧と所定の前後差圧閾値との比較に基づく強制再生開始時期の判断に加えて、前回の強制再生後の車両の走行距離と所定の走行距離閾値との比較に基づく強制再生開始時期の判断を用いることを特徴とする請求項1記載の排気ガス浄化方法。
- 強制再生開始時期であると判断した時に、運転者に警告し、運転者から入力される強制再生開始の信号を受けて強制再生制御を実施する手動再生と、強制再生開始時期であると判断した時に、自動的に強制再生制御を実施する自動再生とを行うことを特徴とする請求項1又は2記載の排気ガス浄化方法。
- 車両に搭載した内燃機関の排気通路にディーゼルパティキュレートフィルタを有する排気ガス浄化装置と、前記ディーゼルパティキュレートフィルタの強制再生開始時期を、前記ディーゼルパティキュレートフィルタの前後差圧と所定の前後差圧閾値との比較に基づいて判断する制御装置を備えた排気ガス浄化システムにおいて、
前記制御装置が、前記前後差圧閾値を前回の強制再生後の車両の走行距離に応じて変化する係数を基準の前後差圧閾値に乗じて設定することを特徴とする排気ガス浄化システム。 - 前記制御装置が、前後差圧と所定の前後差圧閾値との比較に基づく強制再生開始時期の判断に加えて、前回の強制再生後の車両の走行距離と所定の走行距離閾値との比較に基づく強制再生開始時期の判断を用いることを特徴とする請求項4記載の排気ガス浄化システム。
- 前記制御装置が、強制再生開始時期であると判断した時に、運転者に警告し、運転者から入力される強制再生開始の信号を受けて強制再生制御を実施する手動再生と、強制再生開始時期であると判断した時に、自動的に強制再生制御を実施する自動再生とを行うことを特徴とする請求項4又は5記載の排気ガス浄化システム。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007015854A JP4100448B1 (ja) | 2007-01-26 | 2007-01-26 | 排気ガス浄化方法及び排気ガス浄化システム |
CN2007800497031A CN101583778B (zh) | 2007-01-26 | 2007-12-19 | 废气净化方法及废气净化系统 |
AU2007344789A AU2007344789B2 (en) | 2007-01-26 | 2007-12-19 | Exhaust emission purification method and exhaust emission purification system |
EP07850912.2A EP2107221B1 (en) | 2007-01-26 | 2007-12-19 | Exhaust emission purification method and exhaust emission purification system |
PCT/JP2007/074442 WO2008090698A1 (ja) | 2007-01-26 | 2007-12-19 | 排気ガス浄化方法及び排気ガス浄化システム |
US12/449,071 US8646254B2 (en) | 2007-01-26 | 2007-12-19 | Exhaust emission purification method and exhaust emission purification system |
Applications Claiming Priority (1)
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JP2007015854A JP4100448B1 (ja) | 2007-01-26 | 2007-01-26 | 排気ガス浄化方法及び排気ガス浄化システム |
Publications (2)
Publication Number | Publication Date |
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JP4100448B1 true JP4100448B1 (ja) | 2008-06-11 |
JP2008180189A JP2008180189A (ja) | 2008-08-07 |
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JP2007015854A Expired - Fee Related JP4100448B1 (ja) | 2007-01-26 | 2007-01-26 | 排気ガス浄化方法及び排気ガス浄化システム |
Country Status (6)
Country | Link |
---|---|
US (1) | US8646254B2 (ja) |
EP (1) | EP2107221B1 (ja) |
JP (1) | JP4100448B1 (ja) |
CN (1) | CN101583778B (ja) |
AU (1) | AU2007344789B2 (ja) |
WO (1) | WO2008090698A1 (ja) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5325090B2 (ja) * | 2009-12-25 | 2013-10-23 | 三菱重工業株式会社 | 内燃機関の排気浄化装置 |
JP5724223B2 (ja) * | 2010-06-11 | 2015-05-27 | いすゞ自動車株式会社 | Dpfシステム |
US8468808B2 (en) * | 2010-07-08 | 2013-06-25 | GM Global Technology Operations LLC | Optimization of active regeneration triggers based on ambient and vehicle operating conditions |
JP5674393B2 (ja) * | 2010-09-16 | 2015-02-25 | ヤンマー株式会社 | 作業車両の駆動系制御装置 |
US9080494B2 (en) * | 2011-06-07 | 2015-07-14 | GM Global Technology Operations LLC | Particulate filter monitoring methods and systems |
FR2976319A1 (fr) * | 2011-06-10 | 2012-12-14 | Peugeot Citroen Automobiles Sa | Procede de gestion de la regeneration d'un filtre a particules |
CN103987930A (zh) * | 2011-11-22 | 2014-08-13 | 日立建机株式会社 | 工程机械 |
US8806852B2 (en) * | 2012-02-08 | 2014-08-19 | GM Global Technology Operations LLC | Method for controlling regeneration within an after-treatment component of a compression-ignition engine |
FR2987757B1 (fr) * | 2012-03-08 | 2015-06-19 | Peugeot Citroen Automobiles Sa | Filtre a particules |
US8745967B2 (en) * | 2012-05-04 | 2014-06-10 | GM Global Technology Operations LLC | System and method for controlling exhaust regeneration |
JP6056414B2 (ja) * | 2012-11-26 | 2017-01-11 | いすゞ自動車株式会社 | 排気ガス浄化システム及び排気ガス浄化方法 |
JP5905427B2 (ja) * | 2013-09-27 | 2016-04-20 | 三菱重工業株式会社 | Dpf再生制御装置 |
JP2015169137A (ja) | 2014-03-07 | 2015-09-28 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP6148636B2 (ja) * | 2014-03-20 | 2017-06-14 | ヤンマー株式会社 | エンジン |
US9587574B2 (en) * | 2014-11-26 | 2017-03-07 | Electro-Motive Diesel, Inc. | Exhaust system using ash-compensating regeneration management |
CN105201609B (zh) * | 2015-10-10 | 2018-09-21 | 安徽江淮汽车集团股份有限公司 | 一种dpf主动再生方法及其控制系统 |
EP3390789B1 (en) * | 2015-11-18 | 2020-08-19 | Volvo Truck Corporation | Method and arrangement for correcting for error of particulate matter sensors |
KR101786233B1 (ko) | 2015-12-07 | 2017-10-17 | 현대자동차주식회사 | Gpf 강제 재생 방법 |
CN107339137A (zh) * | 2016-12-16 | 2017-11-10 | 安徽江淮汽车集团股份有限公司 | 一种dpf主动再生的控制方法及系统 |
CN108571354B (zh) * | 2017-03-10 | 2020-12-25 | 马自达汽车株式会社 | 发动机的排气装置 |
CN110295982B (zh) * | 2019-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | 一种dpf再生控制方法、装置、存储介质及计算机设备 |
CN111980789B (zh) * | 2020-07-17 | 2021-12-14 | 东风汽车集团有限公司 | 汽油车颗粒捕集器性能劣化的诊断方法与系统 |
CN112127978B (zh) * | 2020-08-19 | 2021-12-17 | 潍柴动力股份有限公司 | 一种颗粒过滤器的再生方法、系统和发动机 |
CN112682191B (zh) * | 2020-12-25 | 2023-01-24 | 潍柴动力股份有限公司 | 一种驻车再生的控制方法、装置和车辆 |
CN114810382B (zh) * | 2022-03-31 | 2023-07-18 | 潍柴动力股份有限公司 | 尾气排放控制方法、系统和发动机 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5195316A (en) * | 1989-12-27 | 1993-03-23 | Nissan Motor Co., Ltd. | Exhaust gas purifying device for an internal combustion engine |
JPH08210122A (ja) * | 1995-02-03 | 1996-08-20 | Nippondenso Co Ltd | ディーゼルエンジンの排気浄化装置 |
US6622480B2 (en) * | 2001-02-21 | 2003-09-23 | Isuzu Motors Limited | Diesel particulate filter unit and regeneration control method of the same |
JP3864910B2 (ja) | 2003-01-10 | 2007-01-10 | 日産自動車株式会社 | 内燃機関の排気浄化装置 |
EP1642016B1 (en) * | 2003-07-08 | 2008-07-30 | Nissan Motor Company, Limited | Combustion control for engine |
JP2005048751A (ja) * | 2003-07-31 | 2005-02-24 | Nissan Motor Co Ltd | エンジンの制御装置 |
JP2005155374A (ja) * | 2003-11-21 | 2005-06-16 | Isuzu Motors Ltd | 排気浄化方法及び排気浄化システム |
JP4517682B2 (ja) | 2004-03-09 | 2010-08-04 | いすゞ自動車株式会社 | 排気ガス浄化システム |
JP4175281B2 (ja) | 2004-03-31 | 2008-11-05 | いすゞ自動車株式会社 | 排気ガス浄化システムの制御方法及び排気ガス浄化システム |
JP4161932B2 (ja) * | 2004-04-09 | 2008-10-08 | いすゞ自動車株式会社 | 排気ガス浄化システムの制御方法及び排気ガス浄化システム |
CN100491704C (zh) * | 2004-08-10 | 2009-05-27 | 日产自动车株式会社 | 柴油机微粒滤清器中微粒沉积量的推算装置及方法 |
JP2006183599A (ja) * | 2004-12-28 | 2006-07-13 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP4513593B2 (ja) * | 2005-02-15 | 2010-07-28 | 株式会社デンソー | 内燃機関の排気ガス浄化装置 |
JP3824003B2 (ja) * | 2005-02-24 | 2006-09-20 | いすゞ自動車株式会社 | 排気ガス浄化システム |
JP2006274906A (ja) * | 2005-03-29 | 2006-10-12 | Mitsubishi Fuso Truck & Bus Corp | 排気浄化装置 |
US7607295B2 (en) * | 2005-07-07 | 2009-10-27 | Nissan Motor Co., Ltd. | Particulate accumulation amount estimating system |
JP2007162569A (ja) * | 2005-12-14 | 2007-06-28 | Nissan Motor Co Ltd | 希釈オイル再生装置及び希釈オイル再生方法 |
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2007
- 2007-01-26 JP JP2007015854A patent/JP4100448B1/ja not_active Expired - Fee Related
- 2007-12-19 US US12/449,071 patent/US8646254B2/en active Active
- 2007-12-19 WO PCT/JP2007/074442 patent/WO2008090698A1/ja active Application Filing
- 2007-12-19 AU AU2007344789A patent/AU2007344789B2/en active Active
- 2007-12-19 EP EP07850912.2A patent/EP2107221B1/en active Active
- 2007-12-19 CN CN2007800497031A patent/CN101583778B/zh active Active
Also Published As
Publication number | Publication date |
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EP2107221A4 (en) | 2012-06-06 |
CN101583778B (zh) | 2011-12-07 |
CN101583778A (zh) | 2009-11-18 |
US20100011750A1 (en) | 2010-01-21 |
WO2008090698A1 (ja) | 2008-07-31 |
AU2007344789A1 (en) | 2008-07-31 |
US8646254B2 (en) | 2014-02-11 |
AU2007344789B2 (en) | 2011-02-24 |
EP2107221A1 (en) | 2009-10-07 |
EP2107221B1 (en) | 2016-07-20 |
JP2008180189A (ja) | 2008-08-07 |
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