EP1264094A2 - Procede d'utilisation d'un moteur a combustion interne en particulier d'un vehicule motorise - Google Patents

Procede d'utilisation d'un moteur a combustion interne en particulier d'un vehicule motorise

Info

Publication number
EP1264094A2
EP1264094A2 EP00991124A EP00991124A EP1264094A2 EP 1264094 A2 EP1264094 A2 EP 1264094A2 EP 00991124 A EP00991124 A EP 00991124A EP 00991124 A EP00991124 A EP 00991124A EP 1264094 A2 EP1264094 A2 EP 1264094A2
Authority
EP
European Patent Office
Prior art keywords
catalyst
concentration
oxygen
combustion engine
internal combustion
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.)
Withdrawn
Application number
EP00991124A
Other languages
German (de)
English (en)
Inventor
Eberhard Schnaibel
Andreas Koring
Holger Bellmann
Thomas Wahl
Andreas Blumenstock
Klaus Winkler
Frank Stanglmeier
Bernd Schumann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1264094A2 publication Critical patent/EP1264094A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus the diagnostic devices measuring oxygen or air concentration downstream of the exhaust 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1408—Dithering techniques
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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
    • F02D2200/0811—NOx storage efficiency
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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

Definitions

  • the invention relates to a method for operating an internal combustion engine, in particular a motor vehicle, in which nitrogen oxide is applied to a catalytic converter and in which the concentration of oxygen after the catalytic converter is measured.
  • the invention also relates to a control device for an internal combustion engine, in particular a motor vehicle, and an internal combustion engine, in particular for a motor vehicle.
  • Such a method, such a control device: and such an internal combustion engine are known, for example, in a so-called intake manifold injection. There, the fuel is injected into the intake pipe of the internal combustion engine during the intake phase. The at the
  • a method of the type mentioned above is also from an internal combustion engine with direct injection known. There, the fuel is injected directly into the combustion chamber of the internal combustion engine during the intake phase. The nitrogen oxides produced are temporarily stored in the downstream catalytic converter and then converted to oxygen.
  • the object of the invention is to provide a method for operating an internal combustion engine with which the aging of the catalyst can be detected.
  • This object is achieved according to the invention in a process of the type mentioned at the outset by increasing the nitrogen oxides supplied to the catalyst and by concluding from an increase in the concentration of oxygen after the catalyst that the catalyst is convertible.
  • the task is solved accordingly.
  • the present invention can be used equally in a manifold injection as in a direct injection internal combustion engine.
  • the increase in the nitrogen oxides supplied to the catalyst leads to an increased conversion of nitrogen oxides into nitrogen and oxygen.
  • the resulting increase in the concentration of oxygen after the catalyst is measured.
  • the convertibility of the catalyst can be concluded from this increase.
  • Convertibility can also be decreased by increasing the concentration of oxygen. This can be used as a measure of the convertibility and thus of the aging of the catalyst.
  • the required lambda probe for measuring the concentration of oxygen after the catalytic converter can also be used for other purposes, for example for controlling and / or regulating the internal combustion engine, in particular for a so-called control control.
  • the concentration of oxygen upstream of the catalyst is kept constant. This ensures that only the increased nitrogen oxides to an increase in the concentration of
  • the lambda upstream of the catalytic converter is kept constant. This also means that only the increased nitrogen oxides lead to an increase in the concentration of oxygen after the catalyst. The method according to the invention is thus considerably simplified.
  • the measured concentration of oxygen after the catalyst represents a concentration of the catalyst
  • Nitrogen oxides supplied to the catalyst are achieved by detuning the ignition timing and / or by other interventions in the control and / or regulation of the internal combustion engine. These are particularly simple and yet precisely understandable options for changing the nitrogen oxides supplied to the catalyst. A repetition of the method according to the invention and thus a continuous diagnosis of the catalytic converter is thus easily possible.
  • control element which is provided for a control device of an internal combustion engine, in particular a motor vehicle.
  • a program is stored on the control element, which is executable on a computing device, in particular on a microprocessor, and is suitable for executing the method according to the invention.
  • the invention is thus implemented by a program stored on the control element, so that this control element provided with the program represents the invention in the same way as the method, for the execution of which the program is suitable.
  • an electrical storage medium can be used as the control element, for example a read-only memory or a flash memory.
  • the figure shows an internal combustion engine 1 of a motor vehicle, in which a piston 2 can be moved back and forth in a cylinder 3.
  • the cylinder 3 is provided with a combustion chamber 4 which is delimited inter alia by the piston 2, an inlet valve 5 and an outlet valve 6.
  • An intake pipe 7 is coupled to the inlet valve 5 and an exhaust pipe 8 is coupled to the exhaust valve 6.
  • An injection valve 9 is provided in the intake pipe 7. In the area of the inlet valve 5 and the outlet valve 6, a spark plug 10 protrudes into the combustion chamber 4. Fuel can be injected into the intake pipe 7 via the injection valve 9. The air / fuel mixture drawn into the combustion chamber 4 can be ignited with the spark plug 10.
  • a rotatable throttle valve 11 is accommodated in the intake pipe 7. The amount of the combustion chamber 4 supplied
  • Air is dependent on the angular position of the throttle valve 11.
  • a catalytic converter 12 is accommodated in the exhaust pipe 8, which serves to clean the exhaust gases resulting from the combustion of the fuel.
  • the catalytic converter 12 is provided for Convert nitrogen oxides (NOx) into nitrogen and oxygen.
  • a continuous lambda probe 13 is provided in the exhaust pipe immediately downstream of the catalytic converter 12 and is suitable for measuring the concentration 02 free of the free oxygen behind the catalytic converter 12 in the exhaust gas.
  • a control device 18 is acted upon by input signals 19, which represent operating variables of the internal combustion engine 1 measured by sensors.
  • the control unit 18 generates output signals 20 with which the behavior of the internal combustion engine 1 can be influenced via actuators or actuators.
  • the control unit 18 is provided to control and / or regulate the operating variables of the internal combustion engine 1. For that purpose it is
  • Control unit 18 is provided with a microprocessor, which has stored a program in a storage medium, in particular in a flash memory, which is suitable for carrying out the aforementioned control and / or regulation.
  • nitrogen oxides are generated, from which the catalytic converter 12 is acted on. These nitrogen oxides are converted by the catalytic converter 12 into nitrogen and oxygen.
  • the ongoing conversion leads to a limitation of the
  • the concentration 02 free of the free oxygen behind the catalyst 12 is composed of the concentration 02 exhaust gas of the oxygen in the exhaust gas after the catalyst 12 and the concentration 02Kat of the oxygen released by the catalyst 12 from the nitrogen oxides supplied.
  • the 02Abgas concentration is approximately in the alcohol range and the 02Kat concentration is in the ppm range.
  • the concentration 02 exhaust gas of the oxygen in the exhaust gas after the catalytic converter 12 is dependent on the oxygen concentration upstream of the catalytic converter and thus on lambda upstream of the catalytic converter 12. For carrying out the diagnosis of the catalytic converter 12 described below, the concentration of the oxygen upstream of the catalytic converter 12 and thus lambda kept constant in front of the catalyst 12. The concentration 02 exhaust gas of the oxygen in the exhaust gas after the catalytic converter 12 is thus constant.
  • the concentration or number of nitrogen oxides upstream of the catalytic converter 12 is increased. This can be done, for example, by detuning the ignition timing of individual cylinders or similar measures.
  • the increased concentration 02Kat in turn leads to an increased concentration 02free of the free oxygen behind the catalyst 12.
  • the increased concentration 02free of free oxygen behind the catalytic converter 12 is measured by the steady lambda probe 13 behind the catalytic converter 12. Due to the constant concentration 02 exhaust gas of the oxygen in the exhaust gas after the catalyst 12 represents that of the
  • Lambda probe 13 measured increased concentration 02 free of the free oxygen immediately increases the concentration 02Kat of the oxygen released by the catalyst 12 from the nitrogen oxides supplied.
  • the diagnosis described above is from the Control unit 18 carried out at predetermined time intervals and / or on the basis of predetermined events. This results in a series of successive measurement results of the increased concentration 02frei, which - as said - represent the increase in the concentration 02Kat.
  • the convertibility of the catalyst 12 decreases over time due to aging. This reduction in the convertibility means that the concentration 02Kat in the measurement results carried out above also decreases over time.
  • the concentration 02Kat is a measure of the convertibility and thus the aging of the catalyst 12.
  • the control unit 18 From the individual measurement results and the course of the successive measurement results of the concentration 02ok, the control unit 18 finally concludes that the converter 12 is capable of conversion and thus of the aging of the catalyst 12. This will e.g. achieved by monitoring the change in concentration 02 freely. It is also possible to monitor the absolute values of concentration 02 freely and, for example, to compare them with the values of a new catalyst. All of these comparisons can be carried out individually or in combination by the control unit 18. Overall, the control unit 18 is thus able to determine the aging or the aging state of the catalytic converter 12. If this aging exceeds a predetermined one
  • Threshold value this is indicated by the control unit 18 to the operator of the internal combustion engine 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un moteur à combustion interne (1) destiné en particulier à un véhicule motorisé, comportant un catalyseur (12) pouvant être alimenté avec des oxydes d'azotes. Une sonde lambda (13) sert à la mesure de la concentration de l'oxygène en aval du catalyseur (12). Un appareil de commande (18) permet d'augmenter la quantité d'oxydes d'azote amenée au catalyseur (12), et la capacité de conversion du catalyseur (12) peut être déduite d'une augmentation de la concentration de l'oxygène en aval du catalyseur (12).
EP00991124A 1999-12-31 2000-12-23 Procede d'utilisation d'un moteur a combustion interne en particulier d'un vehicule motorise Withdrawn EP1264094A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19963936 1999-12-31
DE19963936A DE19963936A1 (de) 1999-12-31 1999-12-31 Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
PCT/DE2000/004655 WO2001049983A2 (fr) 1999-12-31 2000-12-23 Procede d'utilisation d'un moteur a combustion interne en particulier d'un vehicule motorise

Publications (1)

Publication Number Publication Date
EP1264094A2 true EP1264094A2 (fr) 2002-12-11

Family

ID=7935102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991124A Withdrawn EP1264094A2 (fr) 1999-12-31 2000-12-23 Procede d'utilisation d'un moteur a combustion interne en particulier d'un vehicule motorise

Country Status (7)

Country Link
US (1) US20030136114A1 (fr)
EP (1) EP1264094A2 (fr)
JP (1) JP2003519316A (fr)
KR (1) KR20030007391A (fr)
CN (1) CN1415050A (fr)
DE (1) DE19963936A1 (fr)
WO (1) WO2001049983A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004190591A (ja) * 2002-12-12 2004-07-08 Denso Corp 内燃機関の制御装置
DE102005032456A1 (de) * 2005-07-12 2007-01-25 Robert Bosch Gmbh Verfahren zur Dynamikdiagnose einer Abgassonde
US8635853B2 (en) * 2008-01-25 2014-01-28 Caterpillar Inc. Exhaust reduction system having oxygen and temperature control
DE102010002458A1 (de) * 2009-09-11 2011-03-24 Robert Bosch Gmbh Abgassonde
CN102322325B (zh) * 2011-08-11 2013-03-06 潍柴动力股份有限公司 发动机及其降低发动机氮氧化合物的排放量的装置
DE102014208915A1 (de) * 2014-05-12 2015-11-12 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine eines Kraftfahrzeugs im Schubbetrieb bei niedrigen Emissionen und geringem Kraftstoffverbrauch
US9435244B1 (en) * 2015-04-14 2016-09-06 General Electric Company System and method for injection control of urea in selective catalyst reduction

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DE4009901A1 (de) * 1990-03-28 1991-10-02 Bosch Gmbh Robert Verfahren und vorrichtung zur ueberwachung des konvertierungsgrades eines katalysators im abgassystem einer brennkraftmaschine
US5357750A (en) * 1990-04-12 1994-10-25 Ngk Spark Plug Co., Ltd. Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor
DE69420488T2 (de) * 1993-01-19 2000-04-13 Toyota Jidosha K.K., Toyota Abgasreinigungsgerät für eine brennkraftmaschine
JP3228006B2 (ja) * 1994-06-30 2001-11-12 トヨタ自動車株式会社 内燃機関の排気浄化要素劣化検出装置
DE19801625A1 (de) * 1998-01-17 1999-07-22 Bosch Gmbh Robert Diagnose eines NOx-Speicherkatalysators beim Betrieb von Verbrennungsmotoren
DE19801626B4 (de) * 1998-01-17 2010-08-12 Robert Bosch Gmbh Diagnose eines NOx-Speicherkatalysators beim Betrieb von Verbrennungsmotoren
JP2000018062A (ja) * 1998-04-27 2000-01-18 Denso Corp 内燃機関の空燃比制御装置
DE19819461B4 (de) * 1998-04-30 2004-07-01 Siemens Ag Verfahren zur Abgasreinigung mit Trimmregelung
DE19823923C2 (de) * 1998-05-28 2003-04-17 Siemens Ag Verfahren zur Stickoxidreduzierung im Abgas einer Brennkraftmaschine
DE19828928C2 (de) * 1998-06-29 2003-04-17 Siemens Ag Verfahren zur Überwachung des Abgasreinigungssystems einer Brennkraftmaschine
US6035632A (en) * 1998-08-18 2000-03-14 Chrysler Corporation Step response catalyst monitoring

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Title
See references of WO0149983A2 *

Also Published As

Publication number Publication date
WO2001049983A2 (fr) 2001-07-12
DE19963936A1 (de) 2001-07-12
KR20030007391A (ko) 2003-01-23
WO2001049983A3 (fr) 2002-02-14
CN1415050A (zh) 2003-04-30
JP2003519316A (ja) 2003-06-17
US20030136114A1 (en) 2003-07-24

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