WO2001050002A2 - Procede permettant le fonctionnement d'un moteur a combustion interne, en particulier pour un vehicule - Google Patents

Procede permettant le fonctionnement d'un moteur a combustion interne, en particulier pour un vehicule Download PDF

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Publication number
WO2001050002A2
WO2001050002A2 PCT/DE2000/004656 DE0004656W WO0150002A2 WO 2001050002 A2 WO2001050002 A2 WO 2001050002A2 DE 0004656 W DE0004656 W DE 0004656W WO 0150002 A2 WO0150002 A2 WO 0150002A2
Authority
WO
WIPO (PCT)
Prior art keywords
combustion engine
internal combustion
operating
operating mode
exhaust gas
Prior art date
Application number
PCT/DE2000/004656
Other languages
German (de)
English (en)
Other versions
WO2001050002A3 (fr
Inventor
Eberhard Schnaibel
Andreas Koring
Holger Bellmann
Andreas Roth
Andreas Blumenstock
Klaus Winkler
Beate Rittmann
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 WO2001050002A2 publication Critical patent/WO2001050002A2/fr
Publication of WO2001050002A3 publication Critical patent/WO2001050002A3/fr

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
    • F02D41/30—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
    • F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
    • 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
    • F01N3/10—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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/025—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating 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
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/405—Multiple injections with post injections
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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 fuel is injected into a combustion chamber of the internal combustion engine in a first operating mode during an intake phase or in a second operating mode during a compression phase, and in which exhaust gas is applied to a catalytic converter.
  • the invention also relates to a control device for an internal combustion engine, in particular of 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 gasoline direct injection. There the fuel is in a homogeneous operation during the
  • Homogeneous operation is preferably provided for full-load operation of the internal combustion engine, while stratified operation is suitable for idling and part-load operation. For example, depending on the torque requested, such direct-injection internal combustion engine switched between the above modes.
  • the catalytic converter For the conversion of exhaust gases in the catalytic converter of the internal combustion engine described above, it is necessary for the catalytic converter to have a predetermined operating temperature.
  • the internal combustion engine described can be operated at an operating point at which a low
  • Exhaust gas temperature is present. Such an operating point is e.g. in idle mode, in which the internal combustion engine is operated at a low idle speed.
  • the object of the invention is to provide a method for operating an internal combustion engine, with which sufficient cleaning of the exhaust gases is ensured even at operating points with a low exhaust gas temperature.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that at least one additional injection is carried out after combustion at an operating point with a low exhaust gas temperature.
  • the task is solved accordingly.
  • the additional injection creates a combustible mixture in the area of the catalytic converter. This mixture is ignited and burned by the still hot catalyst. The heat generated in this way prevents the catalyst from cooling down. The convertibility of the catalytic converter is retained and cleaning of the exhaust gases is thus guaranteed even at operating points with a low exhaust gas temperature.
  • the number and / or the times of the additional injections are selected such that the operating temperature of the catalytic converter is not fallen below.
  • This number and / or the times can be determined in advance. Alternatively or additionally, it is possible to control and / or regulate the number and / or the times depending on the current temperature of the catalyst.
  • the number and / or the times of the additional injections are chosen such that the catalyst does not overheat.
  • the number and / or the times can be determined in advance and / or currently influenced.
  • the temperature of the catalytic converter is measured, and the additional injections are only carried out when the temperature falls below a limit. This saves fuel and avoids pollutant emissions.
  • Idling is an operating point at which a low exhaust gas temperature can occur. Idling is usually carried out in a direct injection internal combustion engine in shift operation. The method according to the invention is therefore used preferably in shift operation and when the internal combustion engine is idling.
  • 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 in particular be used as the control element
  • Applications are used, for example a read-only memory or a flash memory.
  • an internal combustion engine 1 of a motor vehicle is shown, in which a piston 2 in one
  • Cylinder 3 is reciprocable.
  • 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 and a spark plug 10 protrude into the combustion chamber 4.
  • Fuel can be injected into the combustion chamber 4 via the injection valve 9.
  • the fuel in the combustion chamber 4 can be ignited with the spark plug 10.
  • the internal combustion engine 1 has several such cylinders 3 with associated combustion chambers 4, pistons 2, intake valves 5 and exhaust valves 6. Each of the cylinders 3 is also assigned an injection valve 9 and a spark plug 10.
  • a rotatable throttle valve 11 is accommodated, via which air can be fed to the intake pipe 7.
  • the amount of air supplied depends on the
  • a catalytic converter 12 is accommodated in the exhaust pipe 3 and serves to clean the exhaust gases resulting from the combustion of the fuel.
  • the catalytic converter 12 is a storage catalytic converter 12 ′ which is coupled to a three-way catalytic converter 12 ′′.
  • the catalytic converter 12 is thus intended, inter alia, to temporarily store nitrogen oxides (NOx) and to convert them as well as hydrocarbons (HC).
  • NOx nitrogen oxides
  • HC hydrocarbons
  • the catalyst 12 has an operating temperature of at least about 350 degrees Celsius. Below this operating temperature there is no or only an incomplete conversion.
  • 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.
  • the 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 control and / or regulation mentioned.
  • Throttle valve 11 partially opened or closed depending on the desired torque.
  • the fuel is injected into the combustion chamber 4 by the injection valve 9 during an induction phase caused by the piston 2.
  • the injected fuel is swirled by the air simultaneously sucked in via the throttle valve 11 and is thus distributed substantially uniformly in the combustion chamber 4.
  • the fuel / air mixture is then compressed during the compression phase in order to then be ignited by the spark plug 10.
  • the piston 2 is driven by the expansion of the ignited fuel.
  • the resulting torque depends, among other things, on the position of the throttle valve 11 in homogeneous operation. In view of a low level of pollutants, the fuel / air mixture is set to one if possible. In a second operating mode, a so-called stratified operation of internal combustion engine 1, throttle valve 11 is opened wide.
  • the fuel is injected from the injection valve 9 into the combustion chamber 4 during a compression phase caused by the piston 2, specifically locally in the immediate vicinity of the spark plug 10 and at a suitable time before the ignition point. Then the fuel is ignited with the aid of the spark plug 10, so that the piston 2 is driven in the now following working phase by the expansion of the ignited fuel.
  • the resulting torque largely depends on the injected fuel mass in shift operation.
  • the stratified operation is essentially provided for the idle operation and the partial load operation of the internal combustion engine 1.
  • Exhaust gas temperature can have the consequence that the operating temperature of the catalytic converter 12 required for the conversion is not reached or fallen below. This would lead to a deterioration in exhaust gas purification.
  • at least one additional injection is carried out after combustion in an operating point with a low exhaust gas temperature in stratified operation of the internal combustion engine.
  • This additional injection which can also be referred to as a double injection, passes unburned into the exhaust pipe 8 and to the catalytic converter 12. There, the additionally injected fuel is burned on the hot exhaust pipe 8 and / or on the still hot catalytic converter 12. This combustion generates heat which prevents the catalytic converter 12 from cooling down.
  • the number and / or the times of such double injections can be selected by the control device 18 such that on the one hand the operating temperature of the catalytic converter 12 required for a conversion is not undercut, but on the other hand that the catalytic converter 12 does not overheat.
  • Temperature sensor 13 is assigned to catalytic converter 12, which measures the current temperature of catalytic converter 12 and forwards it to control unit 18.
  • the double injection by the control unit 18 can only be limited to the period in which an operating point with a low exhaust gas temperature, the current temperature of the catalytic converter 12 falls below a limit value.
  • the limit value can be, for example, approximately 400 degrees Celsius and can be stored in the control unit 18.
  • the idling of the internal combustion engine 1 represents one
  • idling is preferably carried out in shift operation.
  • the idling can also be carried out in homogeneous operation.
  • the described method can be used accordingly.

Landscapes

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

Abstract

L'invention concerne un moteur (1) à combustion interne, en particulier pour un véhicule, qui est doté d'une chambre de combustion (4) dans laquelle du carburant peut être injecté dans un premier mode de fonctionnement, pendant une phase d'admission ou dans un second mode de fonctionnement, pendant une phase de compression, et dont les gaz d'échappement peuvent traverser un catalyseur (12). L'invention est caractérisée en ce que, grâce à un appareil de commande (18), au moins une injection supplémentaire est possible après une combustion, en un point de fonctionnement dont la température des gaz d'échappement est faible.
PCT/DE2000/004656 1999-12-31 2000-12-23 Procede permettant le fonctionnement d'un moteur a combustion interne, en particulier pour un vehicule WO2001050002A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19963930.2 1999-12-31
DE19963930A DE19963930A1 (de) 1999-12-31 1999-12-31 Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs

Publications (2)

Publication Number Publication Date
WO2001050002A2 true WO2001050002A2 (fr) 2001-07-12
WO2001050002A3 WO2001050002A3 (fr) 2002-02-14

Family

ID=7935096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/004656 WO2001050002A2 (fr) 1999-12-31 2000-12-23 Procede permettant le fonctionnement d'un moteur a combustion interne, en particulier pour un vehicule

Country Status (2)

Country Link
DE (1) DE19963930A1 (fr)
WO (1) WO2001050002A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163022B4 (de) * 2001-12-19 2008-12-04 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine für Kraftfahrzeuge. Computerprogramm, Steuer- und/oder Regelgerät sowie Brennkraftmaschine
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
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
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207058A (en) * 1990-11-16 1993-05-04 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
US5642705A (en) * 1994-09-29 1997-07-01 Fuji Jukogyo Kabushiki Kaisha Control system and method for direct fuel injection engine
EP0838582A1 (fr) * 1996-10-28 1998-04-29 Institut Francais Du Petrole Procédé de contrÔle de l'admission d'un moteur quatre temps à injection directe
DE19823513C1 (de) * 1998-05-26 1999-07-29 Siemens Ag Verfahren zum Aufheizen eines Katalysators

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430965C2 (de) * 1994-08-31 1997-09-11 Siemens Ag Verfahren zum Steuern der Kraftstoffzufuhr für eine Brennkraftmaschine mit beheizbarem Katalysator
JPH09119310A (ja) * 1995-10-26 1997-05-06 Denso Corp 内燃機関の排ガス浄化装置
DE19547646A1 (de) * 1995-12-20 1997-06-26 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207058A (en) * 1990-11-16 1993-05-04 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
US5642705A (en) * 1994-09-29 1997-07-01 Fuji Jukogyo Kabushiki Kaisha Control system and method for direct fuel injection engine
EP0838582A1 (fr) * 1996-10-28 1998-04-29 Institut Francais Du Petrole Procédé de contrÔle de l'admission d'un moteur quatre temps à injection directe
DE19823513C1 (de) * 1998-05-26 1999-07-29 Siemens Ag Verfahren zum Aufheizen eines Katalysators

Also Published As

Publication number Publication date
DE19963930A1 (de) 2001-07-12
WO2001050002A3 (fr) 2002-02-14

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