WO2008142063A1 - Procédé et dispositif de commande d'un moteur à combustion interne et programme informatique - Google Patents

Procédé et dispositif de commande d'un moteur à combustion interne et programme informatique Download PDF

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Publication number
WO2008142063A1
WO2008142063A1 PCT/EP2008/056144 EP2008056144W WO2008142063A1 WO 2008142063 A1 WO2008142063 A1 WO 2008142063A1 EP 2008056144 W EP2008056144 W EP 2008056144W WO 2008142063 A1 WO2008142063 A1 WO 2008142063A1
Authority
WO
WIPO (PCT)
Prior art keywords
sds
control data
data record
akt
vor
Prior art date
Application number
PCT/EP2008/056144
Other languages
German (de)
English (en)
Inventor
Christian Borgmann
Klaus Hengl-Betz
Dirk Joachimsmeyer
Walter Stigler
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008142063A1 publication Critical patent/WO2008142063A1/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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • 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
    • F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/152—Digital data processing dependent on pinking
    • F02P5/1522—Digital data processing dependent on pinking with particular means concerning an individual cylinder
    • 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 and a device for controlling an internal combustion engine having at least one cylinder, which are associated with an injection valve for metering fuel and a Zündaktuator for actively igniting an air / fuel mixture in a combustion chamber of the cylinder.
  • Internal combustion engines can be operated in different operating modes. For example, it is known to produce a homogeneous air / fuel mixture having an air / fuel ratio that is approximately stoichiometric. Moreover, it is also known to operate internal combustion engines with a stratified charge of the air / fuel mixture, in which a very lean mixture in the combustion chamber can be burned, characterized in that a charge stratification takes place in the vicinity of the ignition actuator.
  • the object on which the invention is based is to provide a method and a device for operating an internal combustion engine, which enable reliable and precise operation of the internal combustion engine.
  • the invention is characterized by a method and a corresponding device for controlling an internal combustion engine with at least one cylinder, which are associated with an injection valve for metering fuel and a Zündaktuator for actively igniting an air / fuel mixture in a combustion chamber of the cylinder in which it is checked on specification of an updated control record for the injection valve and the Zündaktuator whether the updated control record a modified operating mode of the internal combustion engine is assigned compared to an existing control record and the associated operating mode. If this is the case, it is checked whether a triggering of the injection valve or of the ignition actuator based on the existing control data record has already been initiated within the current working cycle associated with the respective cylinder.
  • the initiation on the basis of the existing control data record has not yet taken place, it is checked whether it would have been necessary to initiate an activation of the injection valve or of the ignition actuator based on the updated control data record within the current working cycle assigned to the respective cylinder. If a single would not have been necessary based on the updated control data, the updated control record is assigned the updated control record.
  • the control of the injection valve and the Zündaktuators is carried out on the basis of the existing control data set.
  • the operating mode can be dynamically changed at extremely short notice and the operating mode changed in this way can actually be set for the respective cylinder.
  • initiating a control comprises a lead time required for this, the corresponding delay times within a computer in which the method is preferably computer-implemented, and thus, for example, interrupt latencies. However, it also includes corresponding delay times, which are due to the structure of the respective actuator, so the injection valve or Zündaktuators, even.
  • the respective operating modes differ in particular in that they differ in at least one of the following parameters.
  • the parameters are, for example, the respective operating mode, a number of Operazu tugen of fuel per cycle, which is associated with the respective cylinder, and for example, different specifications for respective reference points of the respective injections or Generalzufugen.
  • the updated control data record is assigned a comparison to the existing identical operating mode, it is checked whether at least one last partial metering of force Substance has already been initiated based on the existing control data record within the current work cycle associated with the respective cylinder, and if this is not the case, it is checked whether at least one last partial metering of fuel should have already started based on the updated control data record, and if not, the updated control record is associated with the updated control record.
  • an updated control data record for the current working cycle can be adopted at very short notice while at the same time ensuring consistent control of the injection valve and the ignition actuator.
  • a total fuel mass to be metered for the working cycle can thus be compensated.
  • an updated control data record for the injection valve and the ignition actuator when specified, it is checked whether a current crankshaft angle lies within a predetermined synchronization interval.
  • the updated control record is assigned the updated control record.
  • the synchronization interval is preferably predetermined in such a way that it is ensured that no activation of the injection valve and also of the ignition actuator based on the existing control data set has already been initiated in the current working cycle assigned to the respective cylinder, or if all actuations of the injection valve and the ignition actuator have already been carried out ,
  • a computer program which comprises program instructions which, when executed on a computer, perform the steps of the method for controlling the internal combustion engine or one of its refinements. According to a preferred embodiment of the computer program, this is designed on a computer-readable medium.
  • FIG. 2 is a flowchart of a program executed in the control device
  • FIG. 3 shows a further flow diagram of a further program which is executed in the control device
  • An internal combustion engine (FIG. 1) comprises an intake tract 1, an engine block 2, a cylinder head 3 and an exhaust tract 4.
  • the intake tract 1 preferably comprises a throttle valve 5, a collector 6 and an intake manifold 7 which lead to a cylinder Z1 via a cylinder Inlet duct is guided in the engine block.
  • the engine block 2 further comprises a crankshaft 8, which is coupled via a connecting rod 10 with the piston 11 of the cylinder Zl.
  • the cylinder head 3 includes a valvetrain having a gas inlet valve 12 and a gas outlet valve 13.
  • the cylinder head 3 further comprises an injection valve 18 and an ignition actuator 19.
  • the ignition actuator can be used, for example, as transistor coil ignition with corresponding ignition electrode, as high-voltage capacitor ignition, as an alternating voltage ignition, laser ignition or another manner known to the person skilled in the art for designing the igniter.
  • a catalyst 21 is arranged, which is preferably designed as a three-way catalyst. Furthermore, a further catalyst 23, which is designed as a NOX catalyst, is preferably arranged in the exhaust gas tract.
  • a control device 25 is provided which is associated with sensors which detect different measured variables and in each case determine the value of the measured variable.
  • Operating variables include not only the measured variables but also derived from these variables.
  • the control device is designed to determine actuating variables as a function of at least one of the operating variables, which are then converted into one or more actuating signals for controlling actuators associated with the control device 25.
  • the control device 25 may also be referred to as a device for controlling the internal combustion engine.
  • the control device 25 comprises a memory which is designed to store data and program instructions and a computing unit which is designed to execute program instructions.
  • the memory and the computing unit form at least part of a computer that is included in the control device 25.
  • Sensors are a pedal position sensor 26, which detects a accelerator pedal position of an accelerator pedal 27, an air mass sensor 28, which detects an air mass flow upstream of the throttle valve 5, a first temperature sensor 32, which detects an intake air temperature, a Saugrohr horrsensor 34 which an intake manifold pressure in the collector. 6 detected, a crankshaft angle sensor 36 which detects a crankshaft angle, which is then assigned a speed. Furthermore, a second temperature sensor 38 is provided which detects an operating temperature, in particular a coolant temperature or a fuel temperature. In addition, a pressure sensor 39 is provided, which detects a fuel pressure, in particular in a high-pressure accumulator fuel supply.
  • an exhaust gas probe 42 is provided which is arranged upstream or in the catalytic converter 21 and which detects a residual oxygen content of the exhaust gas and whose measurement signal is characteristic of the air / fuel ratio in the combustion chamber of the cylinder Z1 and upstream of the first exhaust gas probe before the oxidation of the fuel, hereinafter referred to as the air-fuel ratio in the cylinder Z1 to Z4.
  • any subset of said sensors may be present, or additional sensors may be present.
  • the actuators are, for example, the throttle valve 5, the gas inlet and gas outlet valves 12, 13, the injection valve 18 or the spark plug 19.
  • the programs are preferably executed during operation of the internal combustion engine.
  • the control unit further comprises a functional unit which is designed to preset updated control data sets SDS_AKT for the injection valve 18 and the ignition actuator 19. This is preferably done depending on operating variables. Furthermore, a program is provided, which is explained in more detail below with reference to FIG. 2, by means of which the updated control data record SDS_AKT is assigned to an existing control data record SDS VOR for the injection valve 18 and the ignition actuator 19 under the conditions specified there.
  • control data records are assigned to all cylinders Z1 to Z4.
  • individual control data sets are assigned to the respective cylinders Z1 to Z4.
  • Each control record includes a plurality of control data.
  • the type of control data for each operating mode of the internal combustion engine can be of different types.
  • control data sets comprise injection control parameter sets INJ and one ignition angle IGN in each case.
  • the injection control parameter set INJ comprises an injection duration TI DUR and a reference point REF_T for the injection duration TI_DUR.
  • the reference point may be, for example, an injection start, an injection end, a distance to the last injection or a distance to a next injection. In principle, it can be time-related or preferably crankshaft angle-related.
  • the respective control data record is related to all injection and ignition events during each cycle, which is assigned to the respective cylinder Z1 to Z4.
  • An existing control data record SDS_VOR is used for the actual activation of the ignition actuator 19 associated with the respective cylinder Z1 to Z4 and of the respective injection valve 18.
  • a so-called basic software may be present, which then provides corresponding instructions executes the actual driving of the respective injection valve 18 and the Zündaktuators 19.
  • the control device 25 preferably includes suitable power amplifiers.
  • a program for controlling the internal combustion engine (FIG. 2) is started in a step S1, in which variables can be initialized if necessary.
  • an updated operating mode BM AKT assigned to the updated control data record SDS AKT is determined.
  • a respective updated operating mode BM_AKT or also an existing operating mode BM VOR is characterized by its mode of operation, a number of fuel meterings, that is to say the partial metering and, if appropriate, the type of the reference point REF_T.
  • Operating modes can be, for example, a combustion of the air / fuel mixture with homogeneous mixture formation, ie an approximately stoichiometric air / fuel mixture.
  • the mode may also be a combustion of the air-fuel mixture with a homogeneous stratified charge, characterized in that the air-fuel ratio is lean, such as in a range of lambda equal to 1.8 to 2 and at least one of the partial injections still takes place during an intake stroke, while at least one of the further injections takes place in the compression stroke.
  • the operating mode can also be a catalyst heating, in which fuel is metered at a relatively late crankshaft angle and the ignition angle ING can be very late, for example up to 30 ° crankshaft angle after top dead center when ignited.
  • a step S5 it is then checked whether a current crankshaft angle CRK is within a predetermined synchronization interval CRK_SYNC.
  • the predetermined synchronization interval CRK SYNC is in this context preferably predetermined so as to ensure that in the current working cycle associated with the respective cylinder no activation of the injection valve and also of the ignitor has been initiated based on the existing control data set or already All controls of the injection valve and the Zündaktuators have been performed.
  • the synchronization interval may be in a range of 180 degrees after top dead center when ignited relative to the respective cylinder.
  • step S5 If the condition of step S5 is met, the updated control data record SDS_AKT is assigned to the existing control data record SDS VOR in a step Sil. The processing is then subsequently continued in a step S13, in which the program for a predefinable first waiting period
  • the predetermined first waiting time T Wl can also be given in each case by a predetermined crankshaft angle.
  • the first waiting time T Wl is preferably predetermined so that the step S13 at predetermined intervals - time or crankshaft anglesbzogen - is processed. It can therefore also be different with each passage of the step S13. While the program persists in step S13, it may in particular be interrupted and the computing capacity made available to other programs. Subsequently, the processing is continued again in the step S3.
  • the program can be processed once per cylinder segment, for example, either individually for the respective cylinder Z1 to Z4 or for all cylinders.
  • a cylinder segment is the crankshaft angle that results by dividing the crankshaft angle of a cycle by the number of cylinders. In a burning In four-stroke operation, the engine with four cylinders thus results in a crankshaft angle of 180 ° for the respective cylinder segment.
  • step S3 can also always take place when the updated operating mode BM_AKT is specified.
  • step S6 If, on the other hand, the condition of step S5 is not satisfied, it is checked in step S6 whether the existing operating mode BM VOR is equal to the updated operating mode BM_AKT.
  • step S6 it is checked in a step S7 whether at least one last partial metering of fuel based on the existing control data record SDS VOR has already been initiated within the current working cycle assigned to the respective cylinder Z1 to Z4. If this is not the case, it is checked in a step S9 whether at least one last partial metering of fuel based on the updated control data record SDS AKT within the current working cycle assigned to the respective cylinder Z1 to Z4 should have already been initiated.
  • step Sil If this is not the case, the processing in the step Sil is continued and thus immediately the existing control data record SDS_VOR the updated control record SDS_AKT assigned. If, on the other hand, the condition of step S7 or step S9 has been met, the processing is continued in step S13, and thus no transfer of the updated control data SDS AKT into the existing control data record SDS_VOR is performed at this time.
  • step S6 If the condition of step S6 is not fulfilled, the processing is continued in a step S15, in which it is checked whether an actuation of the injection valve 18 or of the ignition actuator 19 is already based on the current working cycle assigned to the respective cylinder Z1 to Z4 has been initiated on the existing control data record SDS VOR. If this is the case, the processing is continued in step S13 and thus the existing control data record SDS_VOR is not assigned the updated control data record SDS_AKT.
  • step S15 it is checked in a step S17 whether initiation of the injection valve 18 or of the ignition actuator 19 based on the updated control data record SDS_AKT is already initiated within the current work cycle associated with the respective cylinder Z1 to Z4 would have been necessary. If this is the case, then the processing is continued in step S13. If this is not the case, however, the processing is continued in step S11 and the updated control data record SDS_VOR is thus assigned the updated control data record SDS_AKT.
  • a further program is executed, which is explained in more detail with reference to the flowchart of Figure 3. It is started in a step S19.
  • the existing control data record SDS VOR is adopted for the corresponding activation of the injection valve 18 and the spark plug 19.
  • suitable timers can then be started, for example, and at the end of the corresponding timers, the corresponding actuating signals for the injection valve 18 and also for the ignition actuator 19 can be generated.
  • the existing control data record SDS_VOR can still be changed by means of the program according to FIG. 2 under the conditions stated there.
  • the program according to FIG. 3 then preferably remains in a step S23 in which it is preferably interrupted and thus makes the accounting capacity available to other programs.
  • the step S23 may be configured such that it remains for a predetermined second waiting time period T W2, wherein, in particular, it may be predetermined that the step S21 is then executed again when a predetermined event is present.
  • FIG. 4 illustrates by way of example the carrying out of a change of the operating mode with associated updated control data records SDS AKT.
  • hom denotes a combustion with homogeneous air / fuel mixture
  • hom a combustion with homogeneous / stratified operation.
  • the updated control data record SDS_AKT valid for it can not be assigned to the existing control data record SDS_VOR, but the updated control data record SDS AKT valid for the cylinder Z2 can be assigned to the existing control data record SDS_VOR.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

Lors de la spécification d'un ensemble de données de commande mises à jour (SDS_AKT) pour un injecteur et une commande d'allumage, on vérifie si un mode de fonctionnement modifié du moteur à combustion interne est associé à l'ensemble de données de commande mises à jour (SDS_AKT) comparativement à un ensemble de données de commande existantes (SDS_VOR) et au mode de fonctionnement associé à ces données. Si tel est le cas, on vérifie si un pilotage de l'injecteur ou de la commande d'allumage a déjà été initié sur la base de l'ensemble de données de commande existantes (SDS_VOR) durant le cycle de fonctionnement du moment, associé à chaque cylindre (Z1 à Z4). Si le pilotage n'a pas encore été initié sur la base de l'ensemble de données de commande existantes (SDS_VOR), on vérifie s'il serait nécessaire d'initier un pilotage de l'injecteur ou de la commande d'allumage sur la base de l'ensemble de données de commande mises à jour (SDS_AKT) durant le cycle de fonctionnement du moment, associé à chaque cylindre. S'il n'était pas encore nécessaire d'initier ce pilotage sur la base des données de commande mises à jour (SDS_AKT), l'ensemble de données de commande mises à jour est associé à l'ensemble de données de commande existantes (SDS_VOR). Le pilotage de l'injecteur et de la commande d'allumage est alors effectué sur la base de l'ensemble de données de commande existantes.
PCT/EP2008/056144 2007-05-22 2008-05-20 Procédé et dispositif de commande d'un moteur à combustion interne et programme informatique WO2008142063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007023745.8A DE102007023745B4 (de) 2007-05-22 2007-05-22 Verfahren und Vorrichtung zum Steuern einer Brennkraftmaschine und Computerprogramm
DE102007023745.8 2007-05-22

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WO2008142063A1 true WO2008142063A1 (fr) 2008-11-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879955A2 (fr) * 1997-05-21 1998-11-25 Nissan Motor Company, Limited Commande d'un moteur transitoire entre deux états à allumage par étincelle
EP0892161A2 (fr) * 1997-07-18 1999-01-20 Nissan Motor Company, Limited Appareil et méthode de contrÔle de l'instant d'allumage pour moteur à combustion interne
FR2813102A1 (fr) * 2000-08-16 2002-02-22 Bosch Gmbh Robert Procede et dispositif de mise en oeuvre d'un moteur a combustion interne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746902C2 (de) * 1997-10-23 1999-08-19 Siemens Ag Verfahren zum Steuern der Umschaltung der Verbrennung einer mehrzylindrigen Otto-Direkteinspritz-Brennkraftmaschine
DE10236856B4 (de) * 2002-08-07 2016-11-24 Volkswagen Ag Verfahren zur Anhebung einer Abgastemperatur einer Verbrennungskraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879955A2 (fr) * 1997-05-21 1998-11-25 Nissan Motor Company, Limited Commande d'un moteur transitoire entre deux états à allumage par étincelle
EP0892161A2 (fr) * 1997-07-18 1999-01-20 Nissan Motor Company, Limited Appareil et méthode de contrÔle de l'instant d'allumage pour moteur à combustion interne
FR2813102A1 (fr) * 2000-08-16 2002-02-22 Bosch Gmbh Robert Procede et dispositif de mise en oeuvre d'un moteur a combustion interne

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DE102007023745B4 (de) 2015-07-23
DE102007023745A1 (de) 2008-11-27

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