WO2001061173A1 - Dispositif et procede pour commander la regeneration nox d'un catalyseur accumulateur de no¿x? - Google Patents

Dispositif et procede pour commander la regeneration nox d'un catalyseur accumulateur de no¿x? Download PDF

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Publication number
WO2001061173A1
WO2001061173A1 PCT/EP2001/000336 EP0100336W WO0161173A1 WO 2001061173 A1 WO2001061173 A1 WO 2001061173A1 EP 0100336 W EP0100336 W EP 0100336W WO 0161173 A1 WO0161173 A1 WO 0161173A1
Authority
WO
WIPO (PCT)
Prior art keywords
regeneration
idle
storage catalyst
nox
initiated
Prior art date
Application number
PCT/EP2001/000336
Other languages
German (de)
English (en)
Inventor
Hermann Hahn
Sören HINZE
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to JP2001559998A priority Critical patent/JP4421162B2/ja
Priority to EP01909616A priority patent/EP1259718B8/fr
Priority to US10/203,852 priority patent/US6928808B2/en
Priority to DE50107485T priority patent/DE50107485D1/de
Priority to AT01909616T priority patent/ATE305087T1/de
Publication of WO2001061173A1 publication Critical patent/WO2001061173A1/fr

Links

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
    • F01N3/0807—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
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • 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
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/41—Control to generate negative pressure in the intake manifold, e.g. for fuel vapor purging or brake booster

Definitions

  • the invention relates to a device and a method for controlling a NO x regeneration of a NO x storage catalytic converter arranged in the exhaust line of an internal combustion engine for motor vehicles with the features mentioned in the preambles of the independent claims
  • the exhaust gas cleaning system usually comprises components such as particle filters or catalysts. If a raw NO x emission of the internal combustion engine is to be reduced, these catalysts include a reduction catalyst if the mass flows of reducing pollutants such as carbon monoxide CO and incompletely burned hydrocarbons HC are sufficiently high in the area of the reduction catalytic converter is converted to nitrogen using the reducing agents NO x
  • the catalyst is a Assigned NO x memory, which absorbs the NO x as nitrate.
  • the NO x memory can be combined with the catalyst as a so-called NO x memory catalyst
  • a storage capacity of the NO x storage catalytic converter is naturally limited in quantity, so that to avoid NO x breakthroughs, a NO x regeneration must take place at regular intervals.
  • NO x regeneration there is a change in the stoichiometric or rich operation NO x absorbed by nitrate is released again.
  • the NO x regeneration is usually started when a threshold value for a loaded state of the NO x storage catalytic converter or a NO x emission (breakthrough emission) detected downstream by a NO x sensor measuring device is exceeded.
  • the disadvantage here is that the determination of a The need for regeneration in all operating phases of the motor vehicle is based on the same criteria.
  • the NO x regeneration is initiated only after predetermined time intervals and
  • a lean phase in the idle period can be extended to the next mandatory NO x regeneration or be regulated according to the specified time intervals
  • the device according to the invention has means with which the described method steps can be carried out.
  • Such means is preferably a control device in which a procedure is stored in digitized form that enables control of the NO x regeneration in idle mode.
  • the control device can be implemented as an independent control unit are or can also be integrated into an already frequently existing engine control unit
  • a NO x regeneration is currently being carried out during a change to idling, this is preferably completed when the change to idling takes place in a fuel cut-off phase, a speed is above a predetermined threshold value or a motor vehicle speed still exceeds a predetermined limit speed If the NO x regeneration is interrupted, a flag is set which leads to the NO x regeneration being continued in a subsequent acceleration phase. Of course, the flag is withdrawn if a NO x regeneration had to be carried out in idle mode
  • NO x -Regenerat ⁇ on under specification of a lambda value in the range of 0.85 to 1, 0 by feeds on any case, the NO x should -Regenerat ⁇ on but less fat than usual NO x -Regenerat ⁇ onen be carried out this way, let the Larger development in comparison to the "normal" NO x regeneration at lambda values that are significantly less than 0.85, decrease
  • the measures mentioned can reduce the number of NO x regenerations in idle mode compared to the other operating phases of the motor vehicle, so that fuel consumption, NO x emissions during NO x regeneration and the development of larvae are reduced
  • FIG. 1 shows a circuit diagram of an internal combustion engine with a NO x storage catalytic converter arranged in the exhaust line and
  • FIG. 2 shows a block diagram for controlling a NO x regeneration of the NO x .
  • FIG. 1 shows an internal combustion engine 10 with a NO x storage catalytic converter 14 arranged subsequently in the exhaust line 12.
  • a suitable sensor system for detecting the air conditions in the exhaust gas or the proportions of specific pollutant components is assigned to the exhaust line 12.
  • a gas sensor 16 as a lambda sensor and a gas sensor 18 can be provided as a NO x -sens ⁇ t ⁇ ve measuring device.
  • the data recorded by the sensors are made available in a known manner in an engine control unit 20.
  • models are stored in digitized form with which actuating variables for the components assigned to the internal combustion engine 10 are determined allow an influencing of the combustion process with regard to an air ratio, a ignition angle or also an injected fuel mass.
  • an opening angle of an exhaust gas recirculation valve 22 o can be used as manipulated variables the one position of a throttle valve 24
  • the device and the method for regulating the combustion process are sufficiently known and are therefore not explained in more detail here
  • an NO x raw emission of the internal combustion engine 10 is increased and at the same time the reducing agents carbon monoxide CO and incompletely burned hydrocarbons HC required for converting NO x are reduced since this operating range has proven to be particularly economical has to avoid NO x emissions, the NO in a storage component of the NO x Storage catalyst 14 are absorbed If there is a change to stoichiometric or rich operation, the NO x stored in the form of nitrate is desorbed again very quickly, at least immediately after the atmospheric conditions have changed in the NO x storage catalyst 14. If the reducing agent mass flows are too low, the reducing agents are then available the catalyst component of the NO x storage catalytic converter is not possible to the extent necessary that undesirable NO x emissions can occur
  • step S1 it is determined in a first query whether the motor vehicle is in an idling phase (step S1). If this is not the case, then the NO x regeneration of the NO ⁇ storage catalytic converter 14 can be controlled using a conventional method. For example, a loading state of the NO x storage catalytic converter 14 or a NO x emission downstream of the NO x storage catalytic converter 14 are monitored (step S2). If a threshold value for this size is exceeded, the NO x regeneration is initiated by a change in stoichiometric or rich operation
  • a subsequent query (step S3) first determines whether the change to idle takes place during an ongoing NO x regeneration. If the answer is in the affirmative, it is determined in step S4 whether there is an overrun fuel cut-off phase and / or the motor vehicle still has a speed that is above a predetermined limit speed, and / or a rotational speed exceeds a predetermined threshold value. If these boundary conditions exist, the NO regeneration is first completed (step S5). Otherwise, the ongoing NO x regeneration is interrupted and a flag is set (step S6) The flag is used to ensure that after the end of the idling phase, for example in a subsequent acceleration phase of the motor vehicle, the NO x regeneration is resumed
  • Steps S5 and S6 or if the change to idle does not take place during an ongoing NO x regeneration is followed by a redefinition of the threshold values for determining the need for regeneration (step S7) the threshold values for the state of loading or the NO x emissions used in the conventional methods are increased.
  • the values are to be set in such a way that no significant NO x breakthroughs can occur during idling be ensured for the other operating phases of the internal combustion engine 10
  • a fixed time interval can be specified in step S7, after which the NO x regeneration must be carried out.
  • it has proven to be advantageous to control the air ratio during the NO x -Regenerat ⁇ on to a value in the range of ⁇ 0.85 to 1, 0 and at least less fat than in the usual NO x regeneration, since then the development of larvae is much lower

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour commander la régénération NOX d'un catalyseur (14) accumulateur de NOX disposé dans la ligne d'échappement (12) d'un moteur (10) à combustion interne dans un véhicule automobile. La régénération NOX est amorcée au plus tard lorsqu'une valeur seuil d'état de charge du catalyseur (14) accumulateur de NOX ou un niveau d'émission NOX à la sortie du catalyseur (14) accumulateur de NOX est dépassé. Selon l'invention, il est prévu de (a) déterminer si le moteur (10) à combustion interne tourne au ralenti et, (b) en solution de remplacement ou dans une combinaison au choix, d'augmenter la valeur seuil de l'état de charge ou le niveau d'émission NOX au ralenti, d'amorcer la régénération NOX seulement après un intervalle déterminé dans le temps et d'interrompre une régénération NOX en cours, en cas de passage au ralenti.
PCT/EP2001/000336 2000-02-17 2001-01-12 Dispositif et procede pour commander la regeneration nox d'un catalyseur accumulateur de no¿x? WO2001061173A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2001559998A JP4421162B2 (ja) 2000-02-17 2001-01-12 Ｎｏｘ吸蔵触媒のｎｏｘ再生の制御装置及び制御方法
EP01909616A EP1259718B8 (fr) 2000-02-17 2001-01-12 Dispositif et procede pour commander la regeneration nox d'un catalyseur accumulateur de nox
US10/203,852 US6928808B2 (en) 2000-02-17 2001-01-12 Device and method for controlling the nox regeneration of a nox storage catalyst
DE50107485T DE50107485D1 (de) 2000-02-17 2001-01-12 Vorrichtung und verfahren zur steuerung einer nox-regeneration eines nox-speicherkatalysators
AT01909616T ATE305087T1 (de) 2000-02-17 2001-01-12 Vorrichtung und verfahren zur steuerung einer nox-regeneration eines nox-speicherkatalysators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10007049.3 2000-02-17
DE10007049A DE10007049A1 (de) 2000-02-17 2000-02-17 Vorrichtung und Verfahren zur Steuerung einer NO¶x¶-Regeneration eines NO¶x¶-Speicherkatalysators

Publications (1)

Publication Number Publication Date
WO2001061173A1 true WO2001061173A1 (fr) 2001-08-23

Family

ID=7631189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/000336 WO2001061173A1 (fr) 2000-02-17 2001-01-12 Dispositif et procede pour commander la regeneration nox d'un catalyseur accumulateur de no¿x?

Country Status (6)

Country Link
EP (1) EP1259718B8 (fr)
JP (1) JP4421162B2 (fr)
CN (1) CN100340755C (fr)
AT (1) ATE305087T1 (fr)
DE (2) DE10007049A1 (fr)
WO (1) WO2001061173A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929736A (zh) * 2015-07-13 2015-09-23 潍柴动力股份有限公司 燃气车载催化器再生的控制方法

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833993B1 (fr) * 2001-12-26 2004-06-25 Renault Procede de gestion du fonctionnement de dispositifs de post-traitement actifs inseres dans la ligne d'echappement d'un moteur a combustion interne
JP3812653B2 (ja) * 2002-01-17 2006-08-23 三菱自動車工業株式会社 車両用内燃機関の排気浄化装置
DE10242914B4 (de) * 2002-09-16 2006-01-12 Siemens Ag Verfahren zur Adaption der NOx-Rohemission bei Verbrennungskraftmaschinen
DE10305635B4 (de) * 2003-02-11 2011-01-13 Continental Automotive Gmbh Abgasreinigungsverfahren für Magerbrennkraftmaschinen
FR2862097B1 (fr) * 2003-11-07 2006-02-17 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration de moyens de depollution integres dans une ligne d'echappement d'un moteur diesel de vehicule
FR2862096B1 (fr) * 2003-11-07 2006-02-17 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration de moyens de depollution integres dans une ligne d'echappement d'un moteur de vehicule
FR2862099B1 (fr) 2003-11-07 2006-04-14 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration de moyens de depollution integres dans une ligne d'echappement d'un moteur diesel de vehicule
FR2862103B1 (fr) * 2003-11-07 2006-02-17 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration de moyens de depollution integres dans une ligne d'echapement d'un moteur diesel de vehicule automobile
FR2862098B1 (fr) * 2003-11-07 2006-02-17 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration de moyens de depollution integres dans une ligne d'echappement d'un moteur diesel de vehicule
DE102011101079B4 (de) * 2011-05-10 2020-08-20 Umicore Ag & Co. Kg Verfahren zur Regeneration von NOx-Speicherkatalysatoren von Dieselmotoren mit Niederdruck-AGR
JP6481392B2 (ja) * 2015-02-02 2019-03-13 いすゞ自動車株式会社 排気浄化システム
DE102017223819A1 (de) * 2017-12-27 2019-06-27 Hyundai Motor Company Regenerationssystem, Fahrzeug umfassend dasselbe und Regenerationsverfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0752521A1 (fr) * 1995-01-20 1997-01-08 Toyota Jidosha Kabushiki Kaisha Procede de nettoyage des gaz d'echappement pour moteur a combustion interne
EP0829623A1 (fr) * 1996-09-11 1998-03-18 Volkswagen Aktiengesellschaft Procédé pour éliminer les oxydes d'azote de gaz d'échappement
US5992142A (en) * 1996-09-28 1999-11-30 Volkswagen Ag No exhaust emission control method and arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716275C1 (de) * 1997-04-18 1998-09-24 Volkswagen Ag Verfahren zur Stickoxidreduzierung im Abgas einer Brennkraftmaschine
DE19758018A1 (de) * 1997-12-29 1999-07-01 Volkswagen Ag Regeneration eines NOx-Speicherkatalysators eines Verbrennungsmotors
DE19828609A1 (de) * 1998-06-26 1999-12-30 Siemens Ag Verfahren zur Regeneration eines NO¶x¶-Speicherkatalysators für eine Brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0752521A1 (fr) * 1995-01-20 1997-01-08 Toyota Jidosha Kabushiki Kaisha Procede de nettoyage des gaz d'echappement pour moteur a combustion interne
EP0829623A1 (fr) * 1996-09-11 1998-03-18 Volkswagen Aktiengesellschaft Procédé pour éliminer les oxydes d'azote de gaz d'échappement
US5992142A (en) * 1996-09-28 1999-11-30 Volkswagen Ag No exhaust emission control method and arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929736A (zh) * 2015-07-13 2015-09-23 潍柴动力股份有限公司 燃气车载催化器再生的控制方法

Also Published As

Publication number Publication date
ATE305087T1 (de) 2005-10-15
DE10007049A1 (de) 2001-08-23
EP1259718B8 (fr) 2006-03-01
CN1401054A (zh) 2003-03-05
DE50107485D1 (de) 2006-02-02
JP2003522897A (ja) 2003-07-29
CN100340755C (zh) 2007-10-03
EP1259718A1 (fr) 2002-11-27
JP4421162B2 (ja) 2010-02-24
EP1259718B1 (fr) 2005-09-21

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