EP1469180A3 - Method for managing NOx catalyst - Google Patents

Method for managing NOx catalyst Download PDF

Info

Publication number
EP1469180A3
EP1469180A3 EP04008984A EP04008984A EP1469180A3 EP 1469180 A3 EP1469180 A3 EP 1469180A3 EP 04008984 A EP04008984 A EP 04008984A EP 04008984 A EP04008984 A EP 04008984A EP 1469180 A3 EP1469180 A3 EP 1469180A3
Authority
EP
European Patent Office
Prior art keywords
air
fuel ratio
sulfur
feht
stand
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.)
Granted
Application number
EP04008984A
Other languages
German (de)
French (fr)
Other versions
EP1469180A2 (en
EP1469180B1 (en
Inventor
Tatsumasa Sugiyama
Masato Tsuzuki
Masahiko Ishikawa
Nobuki Kobayashi
Jun Tahara
Hidenaga Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Toyota Motor Corp
Original Assignee
Toyota Industries Corp
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp, Toyota Motor Corp filed Critical Toyota Industries Corp
Publication of EP1469180A2 publication Critical patent/EP1469180A2/en
Publication of EP1469180A3 publication Critical patent/EP1469180A3/en
Application granted granted Critical
Publication of EP1469180B1 publication Critical patent/EP1469180B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F02D41/14—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
    • F02D41/146—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 NOx content or concentration
    • F02D41/1463—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 NOx content or concentration of the exhaust gases downstream of exhaust gas treatment apparatus
    • 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
    • F02D41/0275—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 NOx trap or adsorbent
    • 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
    • F02D41/0275—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 NOx trap or adsorbent
    • F02D41/028—Desulfurisation of NOx traps or adsorbent
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • F02D41/3035—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode

Abstract

In a diesel engine, prior to a sulfur discharging process, a pre-process is performed to decrease the air-fuel ratio of the air-fuel mixture that is to be burned in the engine so that the air-fuel ratio A/FEHT of the exhaust gas reaches a predetermined pre-process value α. The time required for the air-fuel ratio A/FEHT of the exhaust gas to stabilize near the pre-process value α is set as a stand-by time TS. The sulfur discharging process starts after the stand-by time elapses. This enhances the convergence of the air-fuel ratio A/FEHT to the target value during the sulfur discharging process. If a predetermined condition is satisfied, the stand-by time is cancelled to start the sulfur discharging process when or just after the pre-process is started. This efficiently processes the sulfur components accumulated in a NOx storage catalyst, which is arranged in an exhaust passage of the engine, without deteriorating the exhaust gas property.
EP04008984.9A 2003-04-15 2004-04-15 Method for managing NOx catalyst Expired - Fee Related EP1469180B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2003110046 2003-04-15
JP2003110046 2003-04-15
JP2003320029 2003-09-11
JP2003320029A JP4276910B2 (en) 2003-04-15 2003-09-11 Management method of NOx catalyst

Publications (3)

Publication Number Publication Date
EP1469180A2 EP1469180A2 (en) 2004-10-20
EP1469180A3 true EP1469180A3 (en) 2005-05-25
EP1469180B1 EP1469180B1 (en) 2019-01-23

Family

ID=32911477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008984.9A Expired - Fee Related EP1469180B1 (en) 2003-04-15 2004-04-15 Method for managing NOx catalyst

Country Status (3)

Country Link
EP (1) EP1469180B1 (en)
JP (1) JP4276910B2 (en)
ES (1) ES2712136T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4349423B2 (en) * 2007-03-01 2009-10-21 トヨタ自動車株式会社 Exhaust gas purification system for internal combustion engine
DE102008059698A1 (en) * 2008-11-29 2010-06-02 Daimler Ag A method for operating a diesel engine with a nitrogen oxide storage catalyst having emission control system
JP7010003B2 (en) * 2018-01-09 2022-01-26 株式会社デンソー Injection control device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892158A2 (en) * 1997-07-19 1999-01-20 Volkswagen Aktiengesellschaft Method and device to monitor the desulphurization of NOx storage catalytic converters
EP0893154A2 (en) * 1997-07-23 1999-01-27 Volkswagen Aktiengesellschaft Process and apparatus for desulphating of NOx-traps for DI-Diesel engines
DE19849082A1 (en) * 1998-08-07 2000-02-10 Volkswagen Ag Process for temperature and lambda dependent desulfation of a NOx storage catalytic converter
WO2003047732A1 (en) * 2001-11-29 2003-06-12 Robert Bosch Gmbh Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892158A2 (en) * 1997-07-19 1999-01-20 Volkswagen Aktiengesellschaft Method and device to monitor the desulphurization of NOx storage catalytic converters
EP0893154A2 (en) * 1997-07-23 1999-01-27 Volkswagen Aktiengesellschaft Process and apparatus for desulphating of NOx-traps for DI-Diesel engines
DE19849082A1 (en) * 1998-08-07 2000-02-10 Volkswagen Ag Process for temperature and lambda dependent desulfation of a NOx storage catalytic converter
WO2003047732A1 (en) * 2001-11-29 2003-06-12 Robert Bosch Gmbh Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases

Also Published As

Publication number Publication date
EP1469180A2 (en) 2004-10-20
ES2712136T3 (en) 2019-05-09
JP4276910B2 (en) 2009-06-10
EP1469180B1 (en) 2019-01-23
JP2004332712A (en) 2004-11-25

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