EP1129280B1 - System and method for detecting and influencing the phase position of an internal combustion engine - Google Patents

System and method for detecting and influencing the phase position of an internal combustion engine Download PDF

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Publication number
EP1129280B1
EP1129280B1 EP00952934A EP00952934A EP1129280B1 EP 1129280 B1 EP1129280 B1 EP 1129280B1 EP 00952934 A EP00952934 A EP 00952934A EP 00952934 A EP00952934 A EP 00952934A EP 1129280 B1 EP1129280 B1 EP 1129280B1
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EP
European Patent Office
Prior art keywords
fuel
control unit
injection
pressure
internal combustion
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EP00952934A
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German (de)
French (fr)
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EP1129280A1 (en
Inventor
Thomas Schuster
Ingolf Rupp
Andreas Roth
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/009Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/009Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • F02D2041/0092Synchronisation of the cylinders at engine start
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • F02D41/38Controlling fuel injection of the high pressure type
    • F02D2041/389Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/02Input parameters for engine control the parameters being related to the engine
    • F02D2200/06Fuel or fuel supply system parameters
    • F02D2200/0602Fuel pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • F02D41/38Controlling fuel injection of the high pressure type
    • F02D41/3809Common rail control systems

Definitions

  • the invention relates to a device and a Methods for recognizing and influencing the Phase position in an internal combustion engine according to Genus of the main claim.
  • crankshaft In an internal combustion engine, especially in one with multiple cylinders, with a crankshaft and one The camshaft is dependent on the engine control unit from the recognized position of the crankshaft or camshaft calculates when in which cylinder fuel to be injected and at what time the Ignition must be triggered. It is common that
  • the control unit can assign the angle detect.
  • crankshaft is within one working cycle turns twice on a four-stroke engine, but can just by scanning the crankshaft the phase position of the internal combustion engine is not clearly determined. at Ignition and injection are in the wrong phase output by 360 ° KW reversed from the control unit. Due to the fact that one cycle of a four stroke Is 720 ° KW and only by means of the sensor in The encoder wheel cannot determine which of the four Pending.
  • phase signal fails if the phase signal is incorrect seen every second attempt because of ignition and 360 ° KW crankshaft injection from the control unit incorrectly output. The engine therefore does not jump on.
  • one Direct gasoline injection gas from the combustion chamber into the Injectors and the fuel rail pushed back what then leads to the fact that even with the correct phase position Starting behavior is affected.
  • the State of the art usually a second transducer or sensor provided, one with the camshaft in Connected encoder disc on your Surface has a reference mark, scanned. That I the camshaft only once during a work cycle turns, the control unit from the Camshaft sensor delivered signal with a single impulse per work cycle the phase angle of the Detect internal combustion engine and a synchronization carry out.
  • a second transducer or sensor provided, one with the camshaft in Connected encoder disc on your Surface has a reference mark, scanned. That I the camshaft only once during a work cycle turns, the control unit from the Camshaft sensor delivered signal with a single impulse per work cycle the phase angle of the Detect internal combustion engine and a synchronization carry out.
  • Such a system is e.g. in the German patent application P 4230616.7.
  • the object of the present invention is to achieve this based on specifying a facility and a procedure by detecting the phase position at the start is possible and through which an improved Start behavior when the phase signal fails. This object is achieved by the characteristic part of the main claim and the Subclaims resolved.
  • the device according to the invention and the method according to the invention have the essentials Advantage that existing assemblies and Components are used, no additional Camshaft sensor is required and no extra Pressure sensors are required.
  • the Rail pressure evaluation usually takes place directly in the Control unit, without additional circuit. If necessary the pressure signal of the fuel rail sensor also via a simple analog / digital comparator circuit Control unit are fed for evaluation.
  • phase If the phase is wrong from the start, it will Injector in question by the Compression back pressure is blown back immediately closed and the pressure increase over, for example the analog / digital comparator circuit to the control unit communicated. Thereupon a resynchronization of Injection and ignition by 360 ° KW from the control unit triggered.
  • the fuel rail is part of Direct fuel injection and has the on each cylinder Internal combustion engine 6 branches for the Injectors 5 that directly the fuel Electromagnetically controlled in the combustion chamber inject. With 2 the air is sucked in marked, 3 is the throttle valve and 4 is that Intake pipe, which also branches to each cylinder having. At 8 is the one that acts as a pressure sensor Fuel rail sensor labeled the ruling one Fuel rail pressure is measured. With direct injection 1, the motor only sucks in normal operation Air on and no longer the fuel-air mixture. The Mixture formation in the combustion chamber allows two completely different operating modes.
  • FIG. 2 shows a perspective illustration of the fuel Rail 7 for a four-cylinder with four Injector 5 the pressure regulator 11 and the as Pressure sensor acting fuel rail sensor 8. That Reference numeral 10 shows the fuel filter, 9 is the Electric fuel pump.
  • the control of the internal combustion engine 6 takes over with direct petrol injection 25 according to Fig. 3.
  • reference numeral 16 is the Designated encoder disc, which is rigid with the crankshaft 12 of the internal combustion engine 6 is connected and at her Scope a variety of similar angle marks 13th having. In addition to these similar angle marks 13 there is a reference mark 14, for example by two missing angle marks is realized.
  • the encoder disc 16 is the pickup 15, for example an inductive Sensor or a Hall sensor or one Magnetoresistive sensor, scanned.
  • the at Passing the angle marks 13 in the sensor 15 generated signals are in the control unit 25 in appropriately processed.
  • Phase sensor that the camshaft 26 or one with the Camshaft 26 connected disc with a mark is not needed here.
  • the information with respect to the phase position resulting from the output signal of such a sensor is usually obtained here with help the pressure sensor signal of the Fuel Rail Sensors 8 received.
  • the control device 25 receives various inputs further for the control or regulation of the Internal combustion engine required input quantities that can be measured by different sensors. 3 these sensors are designated 17. About one Another input is an "ignition on” signal fed that when closing the ignition switch 18 of the terminal 15 of the ignition lock is supplied and the Control unit 25 commissioning the Indicates internal combustion engine.
  • the control unit 25 itself comprises at least one central processor unit 20 and memory 19.
  • Im Control unit 25 signals for injection and Ignition for unspecified components of the Internal combustion engine determined. This will be signals via the outputs 21 and 22 of the control unit 25 issued.
  • the power supply to the control unit 25 takes place in in the usual way with the aid of the battery 23 Switch 24 during operation of the internal combustion engine and one controlled by the control unit itself After-running phase after switching off the engine with the Control unit 25 is connected. In the Follow-up phase will be after the shutdown of the Internal combustion engine 6 information still determined saved, they are then available when switching on again the internal combustion engine 6 to the control unit 25 immediately Available. This information includes in particular also the last angular positions of the crank or Camshaft 12 or 26 and information regarding the last phase.
  • the Crankshaft sensor delivered reference mark signal is ambiguous because the crankshaft 12 within of a work cycle spins twice on a four-stroke engine, while the camshaft 26 is rotating only once. It is therefore used to detect the phase angle from Control device 25 under certain operating conditions, especially at the start, which affects the phase position so that if it is faulty, what about the fuel rail Sensor 8 is measurable, the phase position of the ignition and Injection via control unit 25 by 360 ° KW is resynchronized.
  • the pressure sensor is in the fuel Rail arranged and with the Fuel Rail Sensor 8 identical.
  • the detection takes place Reference mark 14 on the encoder disc 16 a special Injection without ignition at top dead center. at an incorrect phase position will blow back into the corresponding fuel injector 5 with a following pressure increase in the fuel rail 7. After detection the fuel injection valve 5 becomes the pressure increase closed immediately in order to blow back too much prevention. This is followed by re-synchronization of Injection and ignition by 360 ° KW using the Control unit 25.
  • phase is correct (injection in Charge change (top dead center) does not take place Pressure increase in the fuel rail sensor.
  • the injection and Ignition can be correct with the following cylinder Start phase position.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electrical Control Of Ignition Timing (AREA)

Abstract

The invention relates to a system and to a method for controlling or regulating an internal combustion engine (6). According to the invention, a transmitter disk (16) on the crankshaft (12) and a sensing element (15) continuously detect the relative position of the crankshaft (12). The inventive system comprises valves for the direct injection of fuel. The fuel (1) is fed to the fuel injection valves (5) by a pressure-producing electric fuel pump (9) via a fuel rail (7). A control device (25) evaluates the output signals of the sensing element (15) to determine the relative position and to detect the engine speed, the control device (25) triggering injection and/or ignition pulses depending on the relative position detected. According to the invention, the pressure profile in the fuel rail sensor (8) is evaluated to detect the phase position of the internal combustion engine (6). When the fuel-air mixture is forced back with compression counter-pressure into one of the injection valves when the phase position is wrong, that is set-off by 360° (angle of the crankshaft), the pressure in the fuel rail sensor (8) is considerably increased. The fuel rail sensor signal is supplied to the control device (25), thereby effecting a resynchronization by 360 ° (angle of the crankshaft) of ignition and injection and immediately closing the respective fuel injection valve (5) into which the fuel is forced back.

Description

Die Erfindung betrifft eine Einrichtung und ein Verfahren zur Erkennung und Beeinflussung der Phasenlage bei einer Brennkraftmaschine nach der Gattung des Hauptanspruchs.The invention relates to a device and a Methods for recognizing and influencing the Phase position in an internal combustion engine according to Genus of the main claim.

Bei einer Brennkraftmaschine, insbesondere bei einer mit mehreren Zylindern, mit einer Kurbelwelle und einer Nockenwelle wird vom Motorsteuergerät in Abhängigkeit von der erkannten Lage der Kurbel- bzw. Nockenwelle berechnet, wann in welchen Zylinder Kraftstoff eingespritzt werden soll und zu welchem Zeitpunkt die Zündung ausgelöst werden muß. Dabei ist es üblich, dieIn an internal combustion engine, especially in one with multiple cylinders, with a crankshaft and one The camshaft is dependent on the engine control unit from the recognized position of the crankshaft or camshaft calculates when in which cylinder fuel to be injected and at what time the Ignition must be triggered. It is common that

Winkellage der Kurbelwelle mit Hilfe eines Aufnehmers zu ermitteln, der die Kurbelwelle bzw. eine mit dieser verbundenen Geberscheibe mit einer charakteristischen Oberfläche abtastet. Ausgehend von der erhaltenen Impulsfolge kann das Steuergerät die Winkelzuordnung erkennen.Angular position of the crankshaft using a transducer to determine the crankshaft or one with this connected encoder disc with a characteristic Scans surface. Based on the received Pulse sequence, the control unit can assign the angle detect.

Da sich die Kurbelwelle innerhalb eines Arbeitsspiels bei einem Viertakter zweimal dreht, läßt sich jedoch allein durch Abtasten der Kurbelwelle die Phasenlage der Brennkraftmaschine nicht eindeutig bestimmen. Bei einer falschen Phasenlage sind Zündung und Einspritzung um 360° KW verkehrt vom Steuergerät ausgegeben. Aufgrund der Tatsache, daß ein Zyklus eines Viertakters 720° KW beträgt und allein mittels des Sensors im Geberrad nicht bestimmt werden kann, welcher der vier Takte ansteht.Because the crankshaft is within one working cycle turns twice on a four-stroke engine, but can just by scanning the crankshaft the phase position of the internal combustion engine is not clearly determined. at Ignition and injection are in the wrong phase output by 360 ° KW reversed from the control unit. Due to the fact that one cycle of a four stroke Is 720 ° KW and only by means of the sensor in The encoder wheel cannot determine which of the four Pending.

Bei fehlerhaftem Phasensignal mißlingt statistisch gesehen jeder zweite Startversuch, da Zündung und Einspritzung um 360° KW Kurbelwelle vom Steuergerät falsch ausgegeben werden. Der Motor springt daher nicht an. Darüber hinaus wird bei einem Benzindirekteinspritzer Gas aus dem Brennraum in die Einspritzventile und das Fuel Rail zurückgedrückt, was dann dazu führt, daß auch bei richtiger Phasenlage das Startverhalten beeinträchtigt wird.Statistically, the phase signal fails if the phase signal is incorrect seen every second attempt because of ignition and 360 ° KW crankshaft injection from the control unit incorrectly output. The engine therefore does not jump on. In addition, one Direct gasoline injection gas from the combustion chamber into the Injectors and the fuel rail pushed back what then leads to the fact that even with the correct phase position Starting behavior is affected.

Damit die Phasenlage richtig erkannt wird, ist nach dem Stand der Technik üblicherweise ein zweiter Aufnehmer oder Sensor vorgesehen, der eine mit der Nockenwelle in Verbindung stehende Geberscheibe, die an ihrer Oberfläche eine Bezugsmarke aufweist, abtastet. Da sich die Nockenwelle nur einmal während eines Arbeitsspiels dreht, kann das Steuergerät aus dem vom Nockenwellensensor gelieferten Signal mit einem einzigen Impuls pro Arbeitsspiels die Phasenlage der Brennkraftmaschine erkennen und eine Synchronisation durchführen. Ein solches System wird z.B. in der deutschen Patentanmeldung P 4230616.7 beschrieben.In order for the phase position to be recognized correctly, the State of the art usually a second transducer or sensor provided, one with the camshaft in Connected encoder disc on your Surface has a reference mark, scanned. That I the camshaft only once during a work cycle turns, the control unit from the Camshaft sensor delivered signal with a single impulse per work cycle the phase angle of the Detect internal combustion engine and a synchronization carry out. Such a system is e.g. in the German patent application P 4230616.7.

Aus der DE-OS 4418578 geht eine Einrichtung zur Erkennung der Phasenlage bei einer Brennkraftmaschine hervor, die ohne zweiten Sensor in Form eines Nockenwellensensors auskommt, indem unter bestimmten Bedingungen eine Überprüfung der Phasenlage durchgeführt wird, wobei diese Bedingung vorteilhafterweise das Wiedereinsetzen der sequentiellen Kraftstoffeinspritzung nach der Schubabschaltung ist. Im einzelnen wird dabei über einen Segmentzeitvergleich ermittelt, ob die Drehzahl einzelner eingespritzter Zylinder in der erwarteten Winkellage kommen und daraus auf richtige oder falsche Phasenlage geschlossen, wobei unter Segmentzeit eine Zeit zu verstehen ist, die verstreicht, während sich die Kurbelwelle um einen Winkel dreht, der allgemein als Segment bezeichnet wird.From DE-OS 4418578 a device for Detection of the phase position in an internal combustion engine out that without a second sensor in the form of a Camshaft sensor gets by by taking certain Conditions a check of the phase position is performed, this condition advantageously reinstalling the sequential fuel injection after the Thrust shutdown is. In detail, it is about a segment time comparison determines whether the speed single injected cylinder in the expected Angular position come from it and right or wrong Phase position closed, with a segment time Time to understand is the time that passes while the crankshaft rotates through an angle that is general is called a segment.

Bei Benzindirekteinspritzern mit einem Kraftstoffeinspritz-ventil für jeden Kolben einer Brennkraftmaschine ist das Notlaufkonzept einer Saugrohreinspitzung mit Doppelzündung nicht anwendbar. Darüberhinaus wird bei falscher Phasenlage Gas aus dem Brennraum in die Einspritzventile und das Fuel Rail zurückgedrückt, was dazu führt, daß dann auch bei richtiger Phasenlage das Startverhalten beeinträchtigt wird oder der Start ganz verhindert wird.For gasoline direct injection with one Fuel injection valve for each piston one Internal combustion engine is the emergency running concept of one Intake manifold injection with double ignition not applicable. In addition, if the phase is wrong, gas is generated from the Combustion chamber in the injection valves and the fuel rail pushed back, which leads to the fact that at correct phase position affects the starting behavior or the start is completely prevented.

Daher liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Einrichtung und ein Verfahren anzugeben, durch die/das ein Detektieren der Phasenlage beim Start möglich ist und durch die/das sich ein verbessertes Startverhalten bei Ausfall des Phasensignals ergibt. Diese Aufgabe wird erfindungsgemäß durch den kennzeichnenden Teil des Hauptanspruchs und der Unteransprüche gelöst.Therefore, the object of the present invention is to achieve this based on specifying a facility and a procedure by detecting the phase position at the start is possible and through which an improved Start behavior when the phase signal fails. This object is achieved by the characteristic part of the main claim and the Subclaims resolved.

Die erfindungsgemäße Einrichtung und das erfindungsgemäße Verfahren hat den wesentlichen Vorteil, daß bereits vorhandene Baugruppen und Komponenten benutzt werden, kein zusätzlicher Nockenwellensensor benötigt wird und auch keine extra Drucksensoren erforderlich sind. Die Raildruckauswertung erfolgt üblicherweise direkt im Steuergerät, ohne Zusatzschaltung. Gegebenenfalls kann das Drucksignal des Fuel-Rail-Sensors auch über eine einfache analoge/digitale Komparatorschaltung dem Steuergerät zur Auswertung zugeführt werden.The device according to the invention and the method according to the invention have the essentials Advantage that existing assemblies and Components are used, no additional Camshaft sensor is required and no extra Pressure sensors are required. The Rail pressure evaluation usually takes place directly in the Control unit, without additional circuit. If necessary the pressure signal of the fuel rail sensor also via a simple analog / digital comparator circuit Control unit are fed for evaluation.

Nach Erkennung der Bezugsmarke erfolgt eine spezielle Einspritzung ohne Zündung in eines der Kraftstoffeinspritz-ventile beim oberen Totpunkt.After the reference mark has been recognized, a special one takes place Injection without ignition in one of the Fuel injection valves at top dead center.

Bei einer falschen Phasenlage ab Start wird das betreffende Einspritzventil in das durch den Kompressionsgegendruck zurückgeblasen wird, sofort geschlossen und die Druckerhöhung beispielsweise über die analog/digitale Komparatorschaltung dem Steuergerät mitgeteilt. Daraufhin wird eine Umsynchronisation von Einspritzung und Zündung um 360° KW vom Steuergerät ausgelöst.If the phase is wrong from the start, it will Injector in question by the Compression back pressure is blown back immediately closed and the pressure increase over, for example the analog / digital comparator circuit to the control unit communicated. Thereupon a resynchronization of Injection and ignition by 360 ° KW from the control unit triggered.

Ein Ausführungsbeispiel der Erfindung ist in den Figuren dargestellt. An embodiment of the invention is in the Figures shown.

Es zeigen:

Fig. 1:
Eine schematische Darstellung eines Vierzylindermotors
Fig. 2:
Ein Fuel Rail für einen Vierzylindermotor
Fig. 3:
Eine Prinzipdarstellung einer Motorsteuerungseinrichtung.
Show it:
Fig. 1:
A schematic representation of a four-cylinder engine
Fig. 2:
A fuel rail for a four-cylinder engine
Fig. 3:
A schematic diagram of an engine control device.

Die Fig. 1 zeigt mit dem Bezugszeichen 1 den angesaugten Kraftstoff der mittels der in Fig. 2 mit dem Bezugszeichen 9 gekennzeichneten Elektrokraftstoffpumpe in das Fuel Rail 7 gefördert wird. Das Fuel Rail ist Bestandteil bei Benzindirekteinspritzern und hat an jedem Zylinder der Brennkraftmaschine 6 Abzweigungen für die Einspritzventile 5, die direkt den Kraftstoff elektromagnetisch gesteuert in den Brennraum einspritzen. Mit 2 ist die angesaugte Luft gekennzeichnet, 3 ist die Drosselklappe und 4 ist das Saugrohr, das ebenfalls Verzweigungen zu jedem Zylinder aufweist. Mit 8 ist der als Drucksensor fungierende Fuel Rail Sensor gekennzeichnet, der den herrschenden Druck im Fuel Rail mißt. Bei der Direkteinspritzung gemäß Fig. 1 saugt der Motor im Normalbetrieb nur noch Luft an und nicht mehr das Kraftstoffluftgemisch. Die Gemischbildung im Brennraum erlaubt zwei völlig unterschiedliche Betriebsarten. Zum einen muß im Schichtbetrieb das Gemisch nur im Bereich der Zündkerze zündfähig sein. Im anderen übrigen Teil des Brennraums befindet sich dann nur Frisch- und Restgas ohne unverbrannten Kraftstoff. Im Leerlauf und Teillastbereich ergibt sich dann ein sehr mageres Gemisch und damit eine Reduzierung des Kraftstoffverbrauchs.1 shows the reference number 1 sucked in fuel by means of the in Fig. 2 designated by the reference number 9 Electric fuel pump conveyed into the Fuel Rail 7 becomes. The fuel rail is part of Direct fuel injection and has the on each cylinder Internal combustion engine 6 branches for the Injectors 5 that directly the fuel Electromagnetically controlled in the combustion chamber inject. With 2 the air is sucked in marked, 3 is the throttle valve and 4 is that Intake pipe, which also branches to each cylinder having. At 8 is the one that acts as a pressure sensor Fuel rail sensor labeled the ruling one Fuel rail pressure is measured. With direct injection 1, the motor only sucks in normal operation Air on and no longer the fuel-air mixture. The Mixture formation in the combustion chamber allows two completely different operating modes. For one thing, in Shift operation of the mixture only in the area of the spark plug be ignitable. In the other remaining part of the combustion chamber then there is only fresh and residual gas without unburned fuel. At idle and Partial load range then results in a very lean Mixture and thus a reduction in Fuel consumption.

Im Homogenbetrieb zum anderen liegt wie bei der äußeren Gemischbildung im gesamten Brennraum homogenes Gemisch vor. Die gesamte im Brennraum verfügbare Frischluft nimmt am Verbrennungsvorgang teil. Diese Betriebsart wird im Bereich der Vollast verwendet.In homogeneous operation to the other lies like the outer one Mixture formation in the entire combustion chamber homogeneous mixture in front. All fresh air available in the combustion chamber takes part in the combustion process. This operating mode is used in the area of full load.

Fig. 2 zeigt eine perspektivische Darstellung des Fuel Rail 7 für einen Vierzylinder mit vier Einspritzventilen 5 dem Druckregler 11 und dem als Drucksensor fungierenden Fuel Rail Sensor 8. Das Bezugszeichen 10 zeigt das Kraftstoffilter, 9 ist die Elektrokraftstoffpumpe.2 shows a perspective illustration of the fuel Rail 7 for a four-cylinder with four Injector 5 the pressure regulator 11 and the as Pressure sensor acting fuel rail sensor 8. That Reference numeral 10 shows the fuel filter, 9 is the Electric fuel pump.

Die Steuerung bzw. Regelung der Brennkraftmaschine 6 mit Benzindirekteinspritzung übernimmt das Steuergerät 25 gemäß Fig. 3. Mit Bezugszeichen 16 ist die Geberscheibe bezeichnet, die starr mit der Kurbelwelle 12 der Brennkraftmaschine 6 verbunden ist und an ihrem Umfang eine Vielzahl gleichartiger Winkelmarken 13 aufweist. Neben diesen gleichartigen Winkelmarken 13 ist eine Bezugsmarke 14 vorhanden, die bspw. durch zwei fehlende Winkelmarken realisiert ist. Die Geberscheibe 16 wird vom Aufnehmer 15, bspw. einem induktiven Aufnehmer oder einem Hall-Sensor oder einem Magnetoresistiven-Sensor, abgetastet. Die beim Vorbeilaufen der Winkelmarken 13 im Aufnehmer 15 erzeugten Signale werden im Steuergerät 25 in geeigneter Weise aufbereitet. The control of the internal combustion engine 6 The control unit takes over with direct petrol injection 25 according to Fig. 3. With reference numeral 16 is the Designated encoder disc, which is rigid with the crankshaft 12 of the internal combustion engine 6 is connected and at her Scope a variety of similar angle marks 13th having. In addition to these similar angle marks 13 there is a reference mark 14, for example by two missing angle marks is realized. The encoder disc 16 is the pickup 15, for example an inductive Sensor or a Hall sensor or one Magnetoresistive sensor, scanned. The at Passing the angle marks 13 in the sensor 15 generated signals are in the control unit 25 in appropriately processed.

Ein bei herkömmlichen Brennkraftmaschinen vorhandener Phasensensor, der die Nockenwelle 26 bzw. eine mit der Nockenwelle 26 verbundene Scheibe mit einer Markierung abtastet, wird hier nicht benötigt. Die Information bezüglich der Phasenlage, die aus dem Ausgangssignal eines solchen Sensors üblicherweise gewonnen wird, wird hier mit Hilfe des Drucksensorsignals des Fuel Rail Sensors 8 erhalten.An existing in conventional internal combustion engines Phase sensor that the camshaft 26 or one with the Camshaft 26 connected disc with a mark is not needed here. The information with respect to the phase position resulting from the output signal of such a sensor is usually obtained here with help the pressure sensor signal of the Fuel Rail Sensors 8 received.

Das Steuergerät 25 erhält über verschiedene Eingänge weitere für die Steuerung bzw. Regelung der Brennkraftmaschine erforderliche Eingangsgrößen, die von verschiedenen Sensoren gemessen werden. In Fig. 3 sind diese Sensoren mit 17 bezeichnet. Über einen weiteren Eingang wird ein "Zündung ein"- Signal zugeführt, das beim Schließen des Zündschalters 18 von der Klemme 15 des Zündschloßes geliefert wird und dem Steuergerät 25 die Inbetriebnahme des Brennkraftmaschine anzeigt.The control device 25 receives various inputs further for the control or regulation of the Internal combustion engine required input quantities that can be measured by different sensors. 3 these sensors are designated 17. About one Another input is an "ignition on" signal fed that when closing the ignition switch 18 of the terminal 15 of the ignition lock is supplied and the Control unit 25 commissioning the Indicates internal combustion engine.

Das Steuergerät 25 selbst umfaßt wenigstens eine zentrale Prozessoreinheit 20 sowie Speicher 19. Im Steuergerät 25 werden Signale für die Einspritzung und Zündung für nicht näher bezeichnete Komponenten der Brennkraftmaschine ermittelt. Dieses Signale werden über die Ausgänge 21 und 22 des Steuergeräts 25 abgegeben.The control unit 25 itself comprises at least one central processor unit 20 and memory 19. Im Control unit 25 signals for injection and Ignition for unspecified components of the Internal combustion engine determined. This will be signals via the outputs 21 and 22 of the control unit 25 issued.

Die Spannungsversorgung des Steuergeräts 25 erfolgt in üblicher Weise mit Hilfe der Batterie 23 die über den Schalter 24 während des Betriebs der Brennkraftmaschine sowie einer vom Steuergerät selbst gesteuerten Nachlaufphase nach Abstellen des Motors mit dem Steuergerät 25 in Verbindung steht. In der Nachlaufphase werden die nach dem Abstellen der Brennkraftmaschine 6 noch ermittelten Informationen abgespeichert, sie stehen dann beim Wiedereinschalten der Brennkraftmaschine 6 dem Steuergerät 25 sofort zur Verfügung. Diese Informationen umfassen insbesondere auch die letzten Winkelstellungen der Kurbel- bzw. Nockenwelle 12 bzw. 26 sowie Informationen hinsichtlich der letzten Phasenlage.The power supply to the control unit 25 takes place in in the usual way with the aid of the battery 23 Switch 24 during operation of the internal combustion engine and one controlled by the control unit itself After-running phase after switching off the engine with the Control unit 25 is connected. In the Follow-up phase will be after the shutdown of the Internal combustion engine 6 information still determined saved, they are then available when switching on again the internal combustion engine 6 to the control unit 25 immediately Available. This information includes in particular also the last angular positions of the crank or Camshaft 12 or 26 and information regarding the last phase.

Bei einem System, das ohne Phasensensor auskommen soll, d.h. ohne Sensor, der die Stellung der Nockenwelle ermittelt, besteht das Problem, daß das vom Kurbelwellensensor gelieferte Bezugsmarkensignal mehrdeutig ist, da sich die Kurbelwelle 12 innerhalb eines Arbeitsspiels bei einem Viertakter zweimal dreht, während sich die Nockenwelle 26nur einmal dreht. Es wird deshalb zur Erkennung der Phasenlage vom Steuergerät 25 bei bestimmten Betriebsbedingungen, insbesondere beim Start, die Phasenlage so beeinflußt, daß wenn sie fehlerhaft ist, was über den Fuel Rail Sensor 8 meßbar ist, die Phasenlage von Zündung und Einspritzung über das Steuergerät 25 um 360° KW umsynchronisiert wird. Dazu ist der Drucksensor im Fuel Rail angeordnet und mit dem Fuel Rail Sensor 8 identisch.In a system that is supposed to do without a phase sensor, i.e. without sensor, the position of the camshaft determined, there is the problem that the Crankshaft sensor delivered reference mark signal is ambiguous because the crankshaft 12 within of a work cycle spins twice on a four-stroke engine, while the camshaft 26 is rotating only once. It is therefore used to detect the phase angle from Control device 25 under certain operating conditions, especially at the start, which affects the phase position so that if it is faulty, what about the fuel rail Sensor 8 is measurable, the phase position of the ignition and Injection via control unit 25 by 360 ° KW is resynchronized. In addition, the pressure sensor is in the fuel Rail arranged and with the Fuel Rail Sensor 8 identical.

Es kann auch jedem Kraftstoffeinspritzventil 5 ein Drucksensor zugeordnet sein. It can also be any fuel injector 5 Be assigned to the pressure sensor.

Bei einer falschen Phasenlage um 360° KW beim Start erfolgt Rückblasen durch Kompressionsgegendruck in ein betreffendes Einspritzventil. Dies führt zu einer Druckerhöhung im Fuel Rail, die der Sensor 8 registriert. Dies ist über eine einfache analoge/digitale Komparatorschaltung (nicht dargestellt) auswertbar und wird als Signal an das Steuergerät 25 abgegeben. Dort wird eine Umsynchronisation von Zündung und Einspritzung um 360° KW ausgegeben. Die Auswertung des gemessenen Raildruckes kann auch auf andere Weise direkt im Steuergerät erfolgen.With an incorrect phase position by 360 ° KW at the start there is back blowing by compression back pressure in a relevant injector. This leads to a Pressure increase in the fuel rail, which the sensor 8 registered. This is about a simple one analog / digital comparator circuit (not shown) can be evaluated and is sent as a signal to the Control unit 25 issued. There will be one Re-synchronization of ignition and injection by 360 ° KW spent. The evaluation of the measured Rail printing can also be done directly in another way Control unit.

Verfahrenstechnisch erfolgt nach Erkennung der Bezugsmarke 14 an der Geberscheibe 16 eine spezielle Einspritzung ohne Zündung beim oberen Totpunkt. Bei einer falschen Phasenlage erfolgt Rückblasen in das entsprechende Kraftstoffeinspritzventil 5 mit einer folgenden Druckerhöhung im Fuel Rail 7. Nach Erkennen der Druckerhöhung wird das Kraftstoffeinspritzventil 5 sofort geschlossen um ein zu starkes Rückblasen zu unterbinden. Danach erfolgt Umsynchronisation von Einspritzung und Zündung um 360° KW mittels des Steuergeräts 25.Technically, the detection takes place Reference mark 14 on the encoder disc 16 a special Injection without ignition at top dead center. at an incorrect phase position will blow back into the corresponding fuel injector 5 with a following pressure increase in the fuel rail 7. After detection the fuel injection valve 5 becomes the pressure increase closed immediately in order to blow back too much prevention. This is followed by re-synchronization of Injection and ignition by 360 ° KW using the Control unit 25.

Bei richtiger Phasenlage (Einspritzung im Ladungswechsel oberen Totpunkt) erfolgt keine Druckerhöhung im Fuel Rail Sensor. Die Einspritzung und Zündung kann beim folgenden Zylinder mit korrekter Phasenlage beginnen. If the phase is correct (injection in Charge change (top dead center) does not take place Pressure increase in the fuel rail sensor. The injection and Ignition can be correct with the following cylinder Start phase position.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kraftstofffuel
22
Luftair
33
Drosselklappethrottle
44
Saugrohrsuction tube
55
KraftstoffeinspritzventileFuel injectors
66
Motor/BrennkraftmaschineMotor / engine
77
Fuel RailFuel rail
88th
Fuel Rail SensorFuel rail sensor
99
ElektrokraftstoffpumpeElectric fuel pump
1010
Kraftstoffilterfuel
1111
Druckreglerpressure regulator
1212
Kurbelwellecrankshaft
1313
Winkelmarkenangle marks
1414
Bezugsmarkereference mark
1515
Aufnehmerpickup
1616
Geberscheibesensor disk
1717
Sensorensensors
1818
Zündschalterignition switch
1919
SpeicherStorage
2020
Prozessoreinheitprocessor unit
2121
Ausgangoutput
2222
Ausgangoutput
2323
Batteriebattery
2424
Schalterswitch
2525
Steuergerätcontrol unit
2626
Nockenwellecamshaft
KL.15KL.15
Klemme 15Terminal 15

Claims (7)

  1. Device for controlling or regulating an internal combustion engine having a camshaft (26) and a crankshaft (12), the angular position of which is determined continuously by means of a pick-up (15) and a transmitter disc (16) having a reference mark (14), with fuel injection valves (5) which inject the fuel (1) directly into the combustion chambers and the fuel injection valves (5) receive the fuel (1), supplied via a fuel rail (7) from a pressure-generating electric fuel pump (9), with a control unit (25) which evaluates the output signals from the pick-up (15), the control unit containing means for determining the angular position and for determining the rotational speed, the control unit (25) triggering injection and/or ignition pulses as a function of the angular position, characterized in that the means for detecting the phase relation of the internal combustion engine (6) contain a pressure sensor (8), the pressure signal of which has a characteristic profile in the event of the blowback of fuel/air mixture with compression counterpressure in one of the fuel injection valves (5) when there is a false phase relation, offset at 360° crank angle, between ignition and injection, thus leading to a significant increase in the pressure-sensor signal, the pressure-sensor signal being supplied to a control unit (25), and the control unit containing means via which a resynchronization of ignition and injection by the amount of 360° crank angle takes place when blowback is detected.
  2. Device according to Claim 1, characterized in that each fuel injection valve (5) is assigned a pressure sensor (8).
  3. Device according to Claim 1, characterized in that only one pressure sensor (8), which is arranged in the fuel rail (7), is provided for all the cylinders.
  4. Device according to Claim 3, characterized in that the pressure sensor (8) is identical to the fuel-rail sensor.
  5. Device according to Claims 1 to 4, characterized in that the signal of the pressure sensor (8) is evaluated via an analogue/digital comparator circuit and is supplied to the control unit (25).
  6. Device for controlling or regulating an internal combustion engine according to Claims 1-5, characterized in that the control unit contains means which, after detection of the reference mark (14) of the transmitter disc (16) at the first top dead centre, induce special injection, particularly without ignition, at the top dead centre.
  7. Method for controlling or regulating a four-stroke internal combustion engine with fuel injection valves (5) which inject the fuel (1) directly into the combustion chambers, characterized in that, in the event of a false phase relation, a blowback of fuel/air mixture with compression counterpressure takes place in one of the fuel injection valves (5), the said blowback being detected as a result of a pressure increase in a pressure sensor (8), and in that, when a false phase relation is detected, a control unit (25) carries out a resynchronization of ignition and injection by the amount of 360° crank angle.
EP00952934A 1999-07-21 2000-07-13 System and method for detecting and influencing the phase position of an internal combustion engine Expired - Lifetime EP1129280B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19934112A DE19934112A1 (en) 1999-07-21 1999-07-21 Device for controlling or regulating combustion engine has pressure sensor for detecting engine phase angle whose pressure signal has characteristic variation when blow-back occurs
DE19934112 1999-07-21
PCT/DE2000/002291 WO2001007770A1 (en) 1999-07-21 2000-07-13 System and method for detecting and influencing the phase position of an internal combustion engine

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EP1129280A1 EP1129280A1 (en) 2001-09-05
EP1129280B1 true EP1129280B1 (en) 2004-10-13

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EP (1) EP1129280B1 (en)
JP (1) JP4456787B2 (en)
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WO (1) WO2001007770A1 (en)

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JP2003505640A (en) 2003-02-12
WO2001007770A1 (en) 2001-02-01
DE19934112A1 (en) 2001-01-25
EP1129280A1 (en) 2001-09-05
DE50008223D1 (en) 2004-11-18
JP4456787B2 (en) 2010-04-28
US6484691B1 (en) 2002-11-26

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