WO2018068993A1 - Procédé et dispositif pour faire fonctionner un moteur à combustion interne - Google Patents

Procédé et dispositif pour faire fonctionner un moteur à combustion interne Download PDF

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Publication number
WO2018068993A1
WO2018068993A1 PCT/EP2017/073488 EP2017073488W WO2018068993A1 WO 2018068993 A1 WO2018068993 A1 WO 2018068993A1 EP 2017073488 W EP2017073488 W EP 2017073488W WO 2018068993 A1 WO2018068993 A1 WO 2018068993A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
error
determined
fuel
torque
Prior art date
Application number
PCT/EP2017/073488
Other languages
German (de)
English (en)
Inventor
Gerhard Eser
Janos Radeczky
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 WO2018068993A1 publication Critical patent/WO2018068993A1/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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0614—Actual fuel mass or fuel injection amount
    • F02D2200/0616—Actual fuel mass or fuel injection amount determined by estimation
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F02D2200/1004—Estimation of the output torque
    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1012—Engine speed gradient
    • 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • 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
    • F02D41/3809—Common rail control systems
    • 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.
  • the invention further relates to an apparatus for operating an internal combustion engine, which is designed to carry out the method.
  • common rail injection system also called storage injection system
  • injectors with a common fuel distributor (common rail) coupled, which is under high pressure.
  • the injected amount of injection of fuel in each case within a cylinder cycle, also called working cycle, into the cylinder of the internal combustion engine is typically ⁇ metered in in the first place characterized in that the respective injector with a shorter or longer selected activation period is controlled to inject fuel into the respective cylinder , During the activation period, the injector is opened in each case.
  • the injection masses can vary between the individual cylinders. This can lead to torque differences between the cylinders, which can have a negative effect on the smoothness and the emission behavior of the internal combustion engine.
  • signs of wear or deposits can cause an actual opening duration or an actual opening degree of the injector to change for a given fuel pressure and given activation duration during a lifetime of the injectors. It is desirable to provide a method and a corresponding device for operating an internal combustion engine, the reliable operation of the internal combustion engine it ⁇ made possible.
  • the invention is characterized by a method and a corresponding device for operating an internal combustion engine having at least two cylinders.
  • a respective torque output of the cylinders is determined.
  • the torque output is due to an injection of fuel into the respective cylinder.
  • a difference of the torque outputs is determined.
  • the determined difference in the torque outputs is compared with a preset threshold value for the torque outputs. If the difference is greater than the predetermined threshold, a respective injection mass of the respective injection is determined in the respective cylinder. Subsequently, it is determined whether the respective torque output corresponds to the associated injection mass.
  • other error is detected.
  • the other error is an error in the combustion.
  • the other error is in particular an error outside the injection.
  • the injection mass that is to say the mass of fuel that is respectively injected into the cylinder in order to generate a torque at a crankshaft of the internal combustion engine, is normally linearly related to the torque resulting from the injection mass.
  • the injected amount of fuel thus normally dictates the output of the respective cylinder.
  • the injection mass is thus conventionally per ⁇ proportional to the torque of the crankshaft.
  • the other error is, for example, an uneven distribution in the exhaust gas recirculation.
  • the other error is for example a compression loss of one of the cylinders.
  • the other error for example, is ametrisanomalie the injector, in which case the flow is still within the component specification, but for example, the spray pattern deviates from a desired spray pattern. A consequence of this may be a lack of or bad combustion.
  • the other error is according to further embodiments alternatively or additionally another error in the system of the internal combustion engine, which has no direct influence on the injection of fuel.
  • the other error is an error in the combustion of fuel within the cylinders. Due to the determination of the injection masses, which lead to the output torque of the respective cylinder, a plausibility between deviations in the injection masses and errors in the combustion is possible.
  • the injection mass is determined as a function of an associated pressure drop in a fuel distributor (also called a common rail). From the fuel distributor, the fuel is injected into the respective cylinder. The fuel pressure drop at an injection of
  • Fuel entering the cylinder is a measure of the amount of fuel that was injected into the cylinder during injection. By determining the burglary of the Fuel pressure due to an injection can be closed to the injection mass.
  • the injection mass is usually linearly related to the torque output. With a higher injection mass, a higher torque is normally given off. With a smaller injection mass, a correspondingly smaller torque is normally emitted.
  • the difference of the determined injection masses corresponds to the difference of the torque outputs when the different torque outputs occur due to changes in the injection mass. However, if the difference of the injection masses does not correspond to the difference of the torque outputs, according to the application another error is detected which does not occur due to an incorrect injection.
  • the torque-relevant injection mass and the resulting torque per cylinder per cylinder cycle are determined.
  • the period of the cylinder stroke starts at top dead center before intake and ends at top dead center after the combustion gases are expelled.
  • the respective torque-relevant injection mass and the resulting torque per cylinder per cylinder cycle also called working stroke.
  • crankshaft acceleration determined by means of a Geberradsensors and a sensor wheel, which is coupled to the crankshaft.
  • the encoder wheel is, for example, a gear and the encoder ⁇ wheel sensor, for example, a Hall sensor.
  • the crankshaft acceleration is determined as a function of quiet running of the internal combustion engine.
  • the Crankshaft acceleration determined as a function of a speed change of the crankshaft.
  • Figure 1 is a schematic representation of a system with a
  • FIG. 2 shows a schematic representation of a flowchart of a method according to an embodiment
  • Figure 3 is a schematic representation of the relationship
  • Figure 4 is a schematic representation of a fuel ⁇ pressure drop due to injection according to an embodiment.
  • Figure 1 shows a system 100 with an internal combustion engine 106 and a fuel distributor 101 (also called common rail). Fuel from a fuel tank, not shown, is collected under high pressure in the fuel rail 101 and subsequently injected directly into cylinders 102, 103, 104 and 105 of the engine 106. The combustion of the injected fuel resulting in a torque output of the cylinders 102 to 105 to a crankshaft 107 of the internal combustion engine ⁇ 106.
  • the internal combustion engine 106 has four cylinders 102 to 105 on. According to further embodiments, the internal combustion engine .
  • the cylinders 102 to 105 may also be referred to as combustion chambers of the internal combustion engine 106. Due to manufacturing tolerances in the system 100 as well as the occurrence of aging phenomena, the actual injected fuel masses between the individual cylinders 102 to 105 can vary. For example, the amount of fuel that is actually injected per injector for a constant on-control duration changes. These differences between the injection masses of the respective cylinders 102 to 105 lead to different torque outputs of the cylinders 102 to 105 on the crankshaft 107. These torque differences can have a negative effect on the smoothness and the emission behavior of the internal combustion engine.
  • a pressure sensor 108 is disposed to detect the pressure within the fuel rail 101.
  • a device 110 which is for example part of an engine ⁇ control is established, a subsequently carried out in connection with Figure 2 Illustrated method to correct for the different torque outputs so that the respective torque contributions of the cylinder 102 are to 105 within a predetermined tolerance range.
  • step 201 The method according to FIG. 2 is started in step 201. Subsequently, in step 202, the torque output of the Zy ⁇ Linders 102 with the torque output of the cylinder 103 and the torque output of the cylinder 104 and the torque output of the cylinder 105 is compared. For example, to the Kur ⁇ belwellenbevantung per cylinder stroke of the cylinder 102 to 105th ⁇
  • a difference of Kurbelwel ⁇ lenbeschreibungen is determined to infer the differences in the crankshaft acceleration.
  • other combinations of the cylinders 102 to 105 are used for the comparison.
  • the hanging A ⁇ injection mass and the resulting torque linearly related.
  • the injection mass is plotted on the X axis and the torque on the Y axis. If the torque of the cylinder 102 to be reduced by the value Yl, the injection mass for the cylinder 102 is reduced by the value XI accordingly. If the torque of the cylinder 102 is to be increased, the injection mass for the cylinder 102 is increased accordingly.
  • step 203 it is determined whether a deviation of the respective torque outputs of the cylinders 102 to 105 is greater than a predetermined threshold value. For example, it is compared whether the difference between the torque outputs is greater than the predetermined threshold. Is the difference in Torque ⁇ ment charges within predetermined tolerances, so in particular smaller than the predetermined threshold value, it is concluded that a normally functioning system and method in step 204 at least temporarily ended without an adjustment of the injection. 0
  • step 203 If it is determined in step 203 that the deviation of the torque ⁇ torque is greater than the predetermined threshold, the injection mass of the injections in the cylinder 102 to 105 is determined in step 205, which led to the torque outputs, which were determined in step 202. In particular, the injection mass is determined as a function of a pressure drop in the fuel distributor 101.
  • Fuel distributor 101 is applied, followed by an injection at a time T, a fuel pressure drop 401. From the value of the fuel pressure drop 401 can close to the injection mass. A change in the injection mass consequently also results in a change in the fuel pressure drop 401.
  • step 206 the deviation in the output torques is plausibilized with the determined injection masses. It is determined whether the determined pressure drops correspond to the associated determined torques. It is thus determined whether an expected torque output occurs at a specific value of the pressure drop 401.
  • an error-free injection is determined in step 208 and another cause for the irregular combustion determined.
  • the other cause or other fault in the combustion for example, a compression loss of one or more of the cylinders 102 to 105 and / or uneven exhaust gas recirculation to the cylinders 102 to 105.

Landscapes

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

Abstract

La présente invention concerne un procédé pour faire fonctionner un moteur à combustion interne (106) comprenant au moins deux cylindres (102, 103, 104, 105), destiné à un véhicule à moteur, le procédé comprenant les étapes consistant à : déterminer un couple délivré respectif fourni par les cylindres (102, 103, 104, 105) résultant respectivement d'une injection de carburant dans le cylindre (102, 103, 104, 105) respectif ; déterminer une différence entre les couples délivrés ; comparer la différence à une valeur seuil prédéterminée ; et, lorsque la différence est supérieure à la valeur seuil prédéterminée, déterminer une masse d'injection respective de l'injection respective dans le cylindre respectif ; déterminer si les couples délivrés respectifs correspondent à la masse d'injection associée ; et, lorsque les couples délivrés respectifs se trouvent à l'extérieur d'une plage de valeurs de tolérance prédéterminée pour la masse d'injection correspondante respective, déterminer une erreur autre, l'erreur autre étant une erreur dans la combustion.
PCT/EP2017/073488 2016-10-10 2017-09-18 Procédé et dispositif pour faire fonctionner un moteur à combustion interne WO2018068993A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016219571.9A DE102016219571B3 (de) 2016-10-10 2016-10-10 Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102016219571.9 2016-10-10

Publications (1)

Publication Number Publication Date
WO2018068993A1 true WO2018068993A1 (fr) 2018-04-19

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PCT/EP2017/073488 WO2018068993A1 (fr) 2016-10-10 2017-09-18 Procédé et dispositif pour faire fonctionner un moteur à combustion interne

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WO (1) WO2018068993A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017217080B4 (de) * 2017-09-26 2021-08-26 Audi Ag Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19626690A1 (de) * 1996-07-03 1998-01-08 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
DE60117090T2 (de) * 2000-11-14 2006-11-02 C.R.F. Società Consortile per Azioni, Orbassano Verfahren zur Bestimmung von Leckagen in einem Einspritzungsystem mit Verteilerleitung in einem Verbrennungsmotor
DE102007024416A1 (de) * 2007-05-25 2008-11-27 Continental Automotive Gmbh Verfahren und Einrichtung zum Ermitteln eines Drehparameters einer Kurbelwelle
US20110224888A1 (en) * 2010-03-15 2011-09-15 GM Global Technology Operations LLC Method to diagnose a fault in a fuel injection system of an internal combustion engine
WO2014065743A1 (fr) * 2012-10-24 2014-05-01 Scania Cv Ab Diagnostic de cylindre
DE102013224706A1 (de) * 2013-12-03 2015-06-03 Robert Bosch Gmbh Verfahren zur Berechnung des Einspritzratenverlaufs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4277677B2 (ja) * 2003-06-27 2009-06-10 株式会社デンソー ディーゼル機関の噴射量制御装置
JP4218496B2 (ja) * 2003-11-05 2009-02-04 株式会社デンソー 内燃機関の噴射量制御装置
DE102013210909A1 (de) * 2013-06-12 2014-12-18 Robert Bosch Gmbh Verfahren zur Plausibilisierung eines Raildrucksensors
DE102013216255B3 (de) * 2013-08-15 2014-11-27 Mtu Friedrichshafen Gmbh Verfahren zur injektorindividuellen Diagnose einer Kraftstoff-Einspritzeinrichtung und Brennkraftmaschine mit einer Kraftstoff-Einspritzeinrichtung
DE102013222547A1 (de) * 2013-11-06 2015-05-07 Robert Bosch Gmbh Verfahren zum Erkennen einer Abweichung einer Ist-Einspritzmenge von einer Soll-Einspritzmenge eines Injektors einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19626690A1 (de) * 1996-07-03 1998-01-08 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
DE60117090T2 (de) * 2000-11-14 2006-11-02 C.R.F. Società Consortile per Azioni, Orbassano Verfahren zur Bestimmung von Leckagen in einem Einspritzungsystem mit Verteilerleitung in einem Verbrennungsmotor
DE102007024416A1 (de) * 2007-05-25 2008-11-27 Continental Automotive Gmbh Verfahren und Einrichtung zum Ermitteln eines Drehparameters einer Kurbelwelle
US20110224888A1 (en) * 2010-03-15 2011-09-15 GM Global Technology Operations LLC Method to diagnose a fault in a fuel injection system of an internal combustion engine
WO2014065743A1 (fr) * 2012-10-24 2014-05-01 Scania Cv Ab Diagnostic de cylindre
DE102013224706A1 (de) * 2013-12-03 2015-06-03 Robert Bosch Gmbh Verfahren zur Berechnung des Einspritzratenverlaufs

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