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WO2013068173A1 - 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

Info

Publication number
WO2013068173A1
WO2013068173A1 PCT/EP2012/068915 EP2012068915W WO2013068173A1 WO 2013068173 A1 WO2013068173 A1 WO 2013068173A1 EP 2012068915 W EP2012068915 W EP 2012068915W WO 2013068173 A1 WO2013068173 A1 WO 2013068173A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
closing time
coking
actual
degree
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.)
Ceased
Application number
PCT/EP2012/068915
Other languages
German (de)
English (en)
Inventor
Thomas Becker
Matthias Siedentopf
Jochen Walther
Felix Landhaeusser
Rainer Peck
Andreas Sommerer
Steffen Meyer-Salfeld
Rene Zieher
Daniel Heitz
Andreas Bartsch
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 WO2013068173A1 publication Critical patent/WO2013068173A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control
    • 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
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • 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
    • F02D2041/224—Diagnosis of the fuel system
    • 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 according to the preamble of claim 1, and a computer program and a control and / or regulating device according to the independent claims.
  • Fuel quantity can be corrected.
  • quantity errors which are caused by coking on a valve needle and / or a valve nozzle (outlet opening) of the injector, as well as quantity errors, which arise due to wear of a valve seat of the injector, can be compensated during the life of the injector.
  • the invention relates to a method in which fuel is injected by means of an injector into the combustion chamber of the internal combustion engine.
  • the injected fuel quantity of at least one injector in response to wear and coking of the injector with respect to a
  • Target quantity corrected The method comprises the following steps:
  • variable characterizing the degree of coking of the injector is determined using a family of curves as a function of a drive duration, as will be described below. If the variable characterizing the degree of coking has been determined, then due to a known behavior of the injector in
  • the drive signal of the injector changed. For example, the drive signal by a certain amount extended or shortened in time.
  • the amount of coking is a certain amount extended or shortened in time.
  • an actual closing time of the injector is determined. This can be done for example by means of an evaluation of a voltage applied to the electromagnetic or piezoelectric actuator voltage or a current.
  • the ascertained actual closing time is determined by - based on the determined
  • Coking degree adjusted - target closing time compared. The difference is interpreted as the effect of seat wear.
  • the determined actual closing time is at least approximately equal to the target closing time. In this way, the contribution of the
  • step (c) Determining the actual closing time of the injector, according to step (c); (g) comparing the actual closing time with the target closing time corresponding to the step (d);
  • step (H) changing the drive signal of the injector such that the actual closing time is at least approximately equal to the target closing time, corresponding to step (e);
  • step (i) determining a relationship between those used in step (h)
  • Actuation duration correction values as a function of the actuation duration
  • step (k) changing the drive signal of the injector in dependence on the determined variable characterizing the degree of coking, in accordance with step (b).
  • the invention provides that the degree of coking
  • characterizing size is a slope of a straight line or an at least partially straight line curve, wherein the straight line or straight curve driving periods of the injector associated with respective difference values, and wherein a difference value by the difference between an actual closing time and a reference closing time or between an actual - Injection quantity and a reference injection quantity is formed.
  • the reference closing times are determined on a new and non-coked reference injector, for example on a test stand, and then stored in a data memory.
  • the actual closing times of the injector are determined in a comparable manner in the further operation of the internal combustion engine. This allows the
  • activation of the injector is understood here to mean the activation of an injector-actuating electromagnetic or piezoelectric actuation device which
  • the accuracy of the method according to the invention can be further improved if it is carried out as a function of a rail pressure of a fuel system of the internal combustion engine.
  • the rail pressure can fluctuate during operation of the internal combustion engine by a certain amount, resulting in different injected under otherwise identical conditions Fuel quantities can result. By determining the current rail pressure, this fact can be easily taken into account.
  • An embodiment of the method provides that it is carried out using at least one model and / or at least one characteristic map. As a result, computing time for carrying out the method and thus costs can be saved.
  • the model at least one
  • Driving duration includes. It can be different, the injected
  • the method according to the invention can be simplified.
  • the method is at least partially carried out by means of a computer program which is executable on a control and / or regulating device of the internal combustion engine.
  • Figure 1 is a simplified diagram of a fuel system of a
  • Figure 2 is a simplified sectional view of an injection valve of
  • Fuel system of Figure 1 a diagram with differences of reference closing times and actual closing times in response to a drive duration of an injector
  • FIG. 4 is a schematic of a model for carrying out the method
  • FIG. 5 is a flow chart for carrying out the method.
  • FIG. 1 shows a simplified diagram of a fuel system 1 1 of an internal combustion engine 10 with four cylinders 12 and associated therewith
  • Injectors 14 for injecting fuel.
  • the injectors 14 can be actuated by a respective electromagnetic actuator 13.
  • the electromagnetic actuator 13 may be embodied as a piezoelectric actuator 13.
  • Above the injectors 14, a high pressure accumulator 16 ("rail") is shown, which is fed from a high pressure line 18 with fuel.
  • a rail pressure 19 is monitored by a pressure sensor 20.
  • the internal combustion engine 10 is embodied either as a gasoline engine or as a diesel engine.
  • a fuel pump (not shown) feeds the
  • High-pressure accumulator 16 via the high-pressure line 18, wherein the pressure sensor 20 reports the current fuel pressure via an indicated signal line to the control and / or regulating device 22.
  • the four injectors 14 set depending on a drive signal of the electromagnetic actuator 13 from a certain amount of fuel in the cylinder 12 from.
  • FIG. 2 schematically shows some elements of the injector 14 for fuel direct injection of the internal combustion engine 10.
  • the injector 14 is shown in the closed state. Furthermore, in the drawing
  • electromagnetic actuator 13 which comprises a coil 32 and an armature 34 which is pulled into the coil 32 when energized.
  • the movement of the armature 34 is by a rest seat 36 and a
  • Stroke limit 38 limited.
  • the armature 34 rests on the rest seat 36.
  • a valve needle Through an axial bore in the armature 34 is a valve needle
  • a coil spring 44 acts and acts on the valve needle 40 thus in
  • valve needle 40 and the driver 42 together form a valve element 15.
  • the injector 14 may alternatively comprise a piezoelectric actuator 13 instead of the electromagnetic actuator 13. However, this is not explained in detail here.
  • a valve seat 46 is arranged at the lower end of the injector 14 in the drawing.
  • An outlet opening 48 is closed when resting on the valve seat 46 valve needle 40 and opened with lifted valve needle 40 (not shown).
  • Fuel channels are not shown. All movements occur in a vertical direction related to the drawing. It is understood that the injector 14 and / or the leadership of the magnetic flux can also be designed differently from the simplified scheme shown in Figure 2.
  • the coil 32 is energized.
  • the armature 34 is subsequently attracted in the direction of the stroke stop 38 by means of magnetic force.
  • the armature 34 reaches the axial position of the driver 42, it takes the driver 42 in the drawing up with. Characterized the valve needle 40 is lifted from the valve seat 46 and the injector 14 thus opened.
  • Actuator 13 is completed, so the current flowing through the coil 32 and accordingly decreases the magnetic force.
  • the coil spring 44 can move the driver 42 in the drawing down, whereby the armature 34 is forcibly lifted from the stroke stop 38.
  • the armature 34 lifts by means of the inertia of the driver 42 and finally strikes the rest seat 36 at.
  • FIG. 3 shows a family of curves which have a difference value 50 in FIG.
  • the parameter of the three curves shown in the drawing is the respective dimension 54 of a coking (Degree of coking) of the injector 14.
  • the dimension 54 is thus a den
  • Coking degree of the injector 14 characterizing size.
  • the coking means deposits in a region of the outlet opening 48 ("valve nozzle") of the injector 14, which are caused or promoted in particular by unsuitable fuels and / or high temperatures.
  • the coking may cause a reduction in the hydraulic flow through the outlet opening 48.
  • the difference values 50 of FIG. 3 are formed by a difference between actual closing times and reference closing times.
  • straight line 60 - here referred to as straight line 60a, 60b and 60c - can be indicated, for which the respective curve
  • the difference value 50 increases in dependence on the measure 54.
  • corresponding gradients 62a, 62b and 62c also increase.
  • the slopes 62a, 62b and 62c are capable of indicating the dimension 54 of coking.
  • the reference closing times of the injector 14 are, for example, on a test stand at a new and not okten injector 14 in
  • FIG. 4 shows a schematic of a model 64 for carrying out the method.
  • the model 64 is represented by a circle in the middle of the drawing.
  • a first block at the lower left describes a relationship 66 between a difference value 50a ("closing duration drift") and the rail pressure 19.
  • a second block at the bottom right describes a relationship 68 between the difference value 50a and the activation duration 52.
  • a third block at the top left describes a relationship 70 between a difference value 50b ("set drift") and the rail pressure 19.
  • a fourth block at the top right describes a relationship 72 between the difference value 50b and the drive time 52.
  • the difference values 50a correspond to the difference value 50 shown in FIG. 3.
  • the difference values 50b are formed by a difference between actual injection quantities 74 and reference injection quantities 76, similar to that shown in FIG. 3 for the actual closing times and the reference closing times. However, a representation comparable to the difference values 50a of FIG. 3 is not described in detail for the difference values 50b in the present case.
  • Arrows 78 symbolize the consideration of the aforementioned relationships in the model 64. Respectively next to the contexts 66, 68, 70 and 72, corresponding examples in the form of coordinate systems and curves entered therein are shown. The examples show a possible basic course of the associated variables. In particular, the example in the drawing at the bottom right symbolizes the set of curves of Figure 3.
  • the illustrated relationships 66, 68, 70 and 72 thus include several variables used for the model 64 for correcting the injected fuel quantity with respect to coking and wear of the injector 14th
  • FIG. 5 shows a flow chart for carrying out the method, which in the present case is performed individually for each cylinder.
  • a start block 80 the illustrated procedure begins.
  • a following block 82 is a the
  • the influence of the coking by means of changing the drive signal of the injector 14 is corrected by using a relationship between the variable characterizing the degree of coking, the activation duration 52, the rail pressure 19, and the fuel quantity injected therefrom.
  • the actual closing time of the injector 14 is determined in a further block 86 and with a target closing time (without
  • a result of the comparison is used to change the drive signal of the injector 14 again, such that the actual closing time is at least approximately equal to the set closing time.

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  • 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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner un moteur à combustion interne (10), dans lequel du carburant est injecté dans une chambre de combustion (12) du moteur à combustion interne (10) au moyen d'un injecteur (14), une quantité de carburant injecté d'au moins un injecteur (14) étant corrigée en fonction d'une usure et d'une cokéfaction de l'injecteur (14) par rapport à une quantité théorique, le procédé comprenant les étapes suivantes : (a) déterminer une grandeur (54) caractérisant un degré de cokéfaction de l'injecteur (14) ; (b) modifier un signal de commande de l'injecteur (14) en fonction de la grandeur (54) caractérisant le degré de cokéfaction qui a été déterminée ; (c) déterminer ensuite un moment de fermeture réel de l'injecteur (14) ; (d) comparer le moment de fermeture réel avec un moment de fermeture théorique ; et (e) modifier le signal de commande de l'injecteur (14) de telle sorte que le moment de fermeture réel est au moins approximativement égal au moment de fermeture théorique.
PCT/EP2012/068915 2011-11-08 2012-09-26 Procédé et dispositif pour faire fonctionner un moteur à combustion interne Ceased WO2013068173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011085926.8 2011-11-08
DE102011085926A DE102011085926A1 (de) 2011-11-08 2011-11-08 Verfahren zum Betreiben einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2013068173A1 true WO2013068173A1 (fr) 2013-05-16

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PCT/EP2012/068915 Ceased WO2013068173A1 (fr) 2011-11-08 2012-09-26 Procédé et dispositif pour faire fonctionner un moteur à combustion interne

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DE (1) DE102011085926A1 (fr)
WO (1) WO2013068173A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108223177A (zh) * 2016-12-15 2018-06-29 现代自动车株式会社 用于控制车辆的喷射器的方法
DE102018106822A1 (de) 2018-03-22 2019-09-26 Volkswagen Ag Regenerationsverfahren zur Reduzierung des Verkokungsgrades eines einen Injektor umgebenden Ringspaltes
CN114542312A (zh) * 2020-11-11 2022-05-27 罗伯特·博世有限公司 用于求取表征燃料喷射器的流量率的变量的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016200836A1 (de) * 2016-01-21 2017-07-27 Robert Bosch Gmbh Verfahren zur Regelung eines Magnetventil-Injektors
DE102018219028B4 (de) * 2018-11-08 2020-06-25 Continental Automotive Gmbh Verfahren zum Betreiben eines Verbrennungsmotors mit Durchführung einer Einspritzmengenkorrektur
DE102019003815B4 (de) * 2019-05-29 2021-01-28 Mtu Friedrichshafen Gmbh Verfahren zur Überwachung eines Injektors auf mechanische Schädigung
CN110242434B (zh) * 2019-06-28 2022-06-28 潍柴动力股份有限公司 数据处理方法及装置
DE102021207799A1 (de) 2021-07-21 2023-01-26 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Ermitteln einer eine Durchflussrate eines Kraftstoffinjektors charakterisierenden Größe

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DE10211282A1 (de) * 2002-03-14 2003-09-25 Bosch Gmbh Robert Verfahren zur Steuerung und/oder Diagnose eines Kraftstoffzumesssystems, Computerprogramm, Steuergerät und Brennkraftmaschine
DE10232356A1 (de) * 2002-07-17 2004-01-29 Robert Bosch Gmbh Verfahren zur Steuerung von Injektoren eines Kraftstoffzumesssystems einer Brennkraftmaschine
DE102004006896A1 (de) * 2004-02-12 2005-09-15 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102005002242A1 (de) * 2005-01-18 2006-07-20 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoff-Einspritzvorrichtung einer Brennkraftmaschine
DE102005034449A1 (de) * 2005-07-23 2007-01-25 Volkswagen Ag Verfahren und Vorrichtung zur Erkennung von Verkokung an Einspritzdüsen
DE102006003861A1 (de) 2006-01-27 2007-08-02 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffeinspritzvorrichtung, insbesondere eines Kraftfahrzeugs
DE102007002028A1 (de) * 2007-01-13 2007-12-13 Daimlerchrysler Ag Verfahren zur Regelung einer Einspritzmenge an einer Einspritzdüse
DE102008001412A1 (de) * 2008-04-28 2009-10-29 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Einspritzventils
US20100206269A1 (en) * 2009-02-13 2010-08-19 Gm Global Technology Operations, Inc. Fuel injector flow correction system for direct injection engines
DE102009009270A1 (de) * 2009-02-17 2010-08-19 Continental Automotive Gmbh Kalibrierverfahren eines Injektors einer Brennkraftmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10211282A1 (de) * 2002-03-14 2003-09-25 Bosch Gmbh Robert Verfahren zur Steuerung und/oder Diagnose eines Kraftstoffzumesssystems, Computerprogramm, Steuergerät und Brennkraftmaschine
DE10232356A1 (de) * 2002-07-17 2004-01-29 Robert Bosch Gmbh Verfahren zur Steuerung von Injektoren eines Kraftstoffzumesssystems einer Brennkraftmaschine
DE102004006896A1 (de) * 2004-02-12 2005-09-15 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102005002242A1 (de) * 2005-01-18 2006-07-20 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoff-Einspritzvorrichtung einer Brennkraftmaschine
DE102005034449A1 (de) * 2005-07-23 2007-01-25 Volkswagen Ag Verfahren und Vorrichtung zur Erkennung von Verkokung an Einspritzdüsen
DE102006003861A1 (de) 2006-01-27 2007-08-02 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffeinspritzvorrichtung, insbesondere eines Kraftfahrzeugs
DE102007002028A1 (de) * 2007-01-13 2007-12-13 Daimlerchrysler Ag Verfahren zur Regelung einer Einspritzmenge an einer Einspritzdüse
DE102008001412A1 (de) * 2008-04-28 2009-10-29 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Einspritzventils
US20100206269A1 (en) * 2009-02-13 2010-08-19 Gm Global Technology Operations, Inc. Fuel injector flow correction system for direct injection engines
DE102009009270A1 (de) * 2009-02-17 2010-08-19 Continental Automotive Gmbh Kalibrierverfahren eines Injektors einer Brennkraftmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108223177A (zh) * 2016-12-15 2018-06-29 现代自动车株式会社 用于控制车辆的喷射器的方法
DE102018106822A1 (de) 2018-03-22 2019-09-26 Volkswagen Ag Regenerationsverfahren zur Reduzierung des Verkokungsgrades eines einen Injektor umgebenden Ringspaltes
CN114542312A (zh) * 2020-11-11 2022-05-27 罗伯特·博世有限公司 用于求取表征燃料喷射器的流量率的变量的方法

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