WO2009143927A1 - Procédé de conduite d'un moteur à combustion interne et moteur à combustion interne - Google Patents

Procédé de conduite d'un moteur à combustion interne et moteur à combustion interne Download PDF

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Publication number
WO2009143927A1
WO2009143927A1 PCT/EP2009/002327 EP2009002327W WO2009143927A1 WO 2009143927 A1 WO2009143927 A1 WO 2009143927A1 EP 2009002327 W EP2009002327 W EP 2009002327W WO 2009143927 A1 WO2009143927 A1 WO 2009143927A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
combustion chamber
cylinder
internal combustion
combustion engine
Prior art date
Application number
PCT/EP2009/002327
Other languages
German (de)
English (en)
Inventor
Herbert Zöller
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2009143927A1 publication Critical patent/WO2009143927A1/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
    • F02D41/38—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
    • 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
    • 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
    • F02D2250/11—Oil dilution, i.e. prevention thereof or special controls according thereto
    • 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
    • F02D41/401—Controlling injection timing
    • 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 which subsequent to ignition of a fuel mixture, a combustion chamber of the cylinder is subsequently supplied with fuel, and in which subsequently the combustion chamber fuel supplied during a subsequent to the ignition exhaust stroke at least partially for regenerating a Exhaust after-treatment device is discharged into an exhaust line. Furthermore, the invention relates to an internal combustion engine.
  • EP 1 744 022 A1 describes a method for operating an internal combustion engine, in which fuel is subsequently injected during a combustion cycle, that is, following the ignition of the fuel mixture, into the combustion chamber of a cylinder.
  • This subsequent pressurization of the combustion chamber with fuel which is also referred to as late post-injection, takes place, for example, at a crank angle of 60 ° to 120 ° after an upper ignition dead center of the piston.
  • the subsequently supplied to the combustion chamber fuel is at least partially discharged into an exhaust line during a following on the combustion cycle Au Touchtaktes.
  • the exhaust line is the subsequently supplied, unburned fuel for regenerating an exhaust aftertreatment device, such as a diesel particulate filter and / or a Storage catalyst available.
  • the subsequently injected fuel is supplied to only one cylinder of an internal combustion engine having a plurality of cylinders, in order to reduce an entry of the fuel into engine oil located in the cylinder.
  • a disadvantage of such a method for operating an internal combustion engine is the fact that in the late post-injection in only one cylinder still comparatively much fuel is added to the engine oil.
  • the invention is based on the finding that the subsequently added fuel is deposited on an inner wall of the cylinder, especially when the piston is in a downward movement, during which a comparatively low internal pressure prevails in the combustion chamber.
  • the fuel during the exhaust stroke of the combustion chamber is subsequently fed at a crank angle of 340 ° after an upper Zündtot Vietnamese (ignition TDC) of the piston.
  • the piston is thus located just before an overlap TDC, so that the subsequently supplied fuel is particularly effective in a trough of the piston can be caught. This is particularly largely avoidable that the subsequent supplied fuel can reach the inner wall of the cylinder and mix there with engine oil.
  • the object is achieved by an internal combustion engine, in particular a self-igniting internal combustion engine, with an injection device, by means of which a combustion chamber of a cylinder can be subsequently acted upon by fuel after ignition of a fuel mixture, the fuel at least partially by means of an outlet for Regeneration of an exhaust gas aftertreatment device can be discharged into an exhaust line, wherein an injection device associated with the control unit is provided, by means of which within an exhaust stroke injection timing is predetermined, and wherein in the injection time a movable piston in the cylinder during an upward movement with the subsequently supplied to the combustion chamber fuel can be acted upon.
  • ignition 12 of a fuel mixture in a combustion chamber of a cylinder of the internal combustion engine takes place shortly before or immediately after a piston of the cylinder has an upper one Zündtot Vietnamese 14 (ignition TDC) has reached.
  • Zündtot Vietnamese 14 ignition TDC
  • a downward movement of the piston takes place.
  • An opening time 16, to which at least one exhaust valve of the cylinder is transferred to an open position, according to the figure is located shortly before a bottom dead center 18 of the piston.
  • the opening time 16 of the at least one exhaust valve begins an exhaust stroke 20, which lasts until closing 22 of the at least one exhaust valve.
  • the closing 22 of the exhaust valve takes place here after reaching an overlap TDC 24, which is also referred to as a gas exchange TDC.
  • opening 26 at least one inlet valve of the cylinder.
  • An overlapping phase in which the at least one inlet valve of the cylinder and at the same time the at least one outlet valve of the cylinder are transferred to an open position, so can be distinguished by the opening 26 of the inlet valve and the closing 22 of the exhaust valve.
  • the subsequently supplied diesel fuel is available for regenerating at least one exhaust aftertreatment device, such as a diesel particulate filter and / or a storage catalytic converter.
  • combustion chamber of the cylinder supplied subsequently supplied diesel fuel just before or on the overlap TDC 24, such as at a crank angle of 300 ° to 360 °, in particular from 335 ° to 345 ° to the upper Zündtot Vietnamese 14, so is in the combustion chamber particularly well-prepared diesel fuel.
  • the particularly well-prepared diesel fuel can be discharged particularly efficiently into the exhaust gas line and can be used to regenerate the exhaust gas aftertreatment device.
  • an injection point 32 located within the exhaust stroke 20 may be at a crank angle of 340 ° after the upper ignition dead center 14.
  • the piston is located just before the overlap TDC 24.
  • the piston can absorb the subsequently supplied diesel fuel particularly well in a concave recess viewed from the combustion chamber and thus prevent the subsequently supplied diesel fuel from reaching an inner wall of the cylinder reached. Thereby, an entry of the diesel fuel into the engine oil of the internal combustion engine is minimized by wetting the inner wall of the cylinder and mixing with engine oil located on the inner wall of the cylinder.
  • Injection device for supplying the diesel fuel into the combustion chamber of the cylinder is used.
  • the control unit is the upward movement of the piston and in particular the associated crank angle communicates in the upward movement, so that the injection timing of the injector 32 by the control unit is particularly accurate predetermined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un procédé de conduite d'un moteur à combustion interne dans lequel, après l'allumage (12) d'un mélange de carburant, la chambre de combustion d'un cylindre est encore alimentée en carburant et dans lequel ce carburant apporté ultérieurement dans la chambre de combustion est éjecté au moins en partie pendant la course d'échappement (20) qui suit l'allumage pour régénérer un dispositif de post-traitement des gaz d'échappement disposé dans un conduit de gaz d'échappement, le carburant étant apporté dans la chambre de combustion pendant la course d'échappement (20) tandis qu'un piston qui se déplace dans le cylindre exécute un déplacement vers le haut. L'invention concerne en outre un moteur à combustion interne.
PCT/EP2009/002327 2008-05-29 2009-03-31 Procédé de conduite d'un moteur à combustion interne et moteur à combustion interne WO2009143927A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008025851A DE102008025851A1 (de) 2008-05-29 2008-05-29 Verfahren zum Betreiben einer Verbrennungskraftmaschine und Verbrennungskraftmaschine
DE102008025851.2 2008-05-29

Publications (1)

Publication Number Publication Date
WO2009143927A1 true WO2009143927A1 (fr) 2009-12-03

Family

ID=40843346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/002327 WO2009143927A1 (fr) 2008-05-29 2009-03-31 Procédé de conduite d'un moteur à combustion interne et moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102008025851A1 (fr)
WO (1) WO2009143927A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011083458A1 (de) * 2011-09-27 2013-03-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Einbringen von unverbrannten Kohlenwasserstoffen in einen Abgastrakt einer Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010015193A1 (en) * 1998-07-22 2001-08-23 Toyota Jidosha Kabushiki Kaisha Control system for an internal combustion engine
JP2002371900A (ja) * 2001-06-19 2002-12-26 Isuzu Motors Ltd 内燃機関における燃料噴射制御方法
EP1281852A2 (fr) * 2001-08-03 2003-02-05 C.R.F. Società Consortile per Azioni Méthode pour lancer la régénération d'un filtre à particules pour un moteur diesel à injection directe avec système d'injection à common-rail
FR2885390A1 (fr) * 2005-05-04 2006-11-10 Renault Sas Procede de regeneration d'un filtre a particules pour moteur , par injection de carburant.
WO2009037405A2 (fr) * 2007-09-20 2009-03-26 Renault S.A.S Procede d'injection de carburant dans un cylindre de moteur a combustion interne

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1744022A1 (fr) 2005-07-11 2007-01-17 Ford Global Technologies, LLC Réduction de dilution de l'huile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010015193A1 (en) * 1998-07-22 2001-08-23 Toyota Jidosha Kabushiki Kaisha Control system for an internal combustion engine
JP2002371900A (ja) * 2001-06-19 2002-12-26 Isuzu Motors Ltd 内燃機関における燃料噴射制御方法
EP1281852A2 (fr) * 2001-08-03 2003-02-05 C.R.F. Società Consortile per Azioni Méthode pour lancer la régénération d'un filtre à particules pour un moteur diesel à injection directe avec système d'injection à common-rail
FR2885390A1 (fr) * 2005-05-04 2006-11-10 Renault Sas Procede de regeneration d'un filtre a particules pour moteur , par injection de carburant.
WO2009037405A2 (fr) * 2007-09-20 2009-03-26 Renault S.A.S Procede d'injection de carburant dans un cylindre de moteur a combustion interne

Also Published As

Publication number Publication date
DE102008025851A1 (de) 2009-12-03

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