EP1149239B1 - Fuel supply system for an internal combustion engine, especially a motor vehicle - Google Patents

Fuel supply system for an internal combustion engine, especially a motor vehicle Download PDF

Info

Publication number
EP1149239B1
EP1149239B1 EP00910504A EP00910504A EP1149239B1 EP 1149239 B1 EP1149239 B1 EP 1149239B1 EP 00910504 A EP00910504 A EP 00910504A EP 00910504 A EP00910504 A EP 00910504A EP 1149239 B1 EP1149239 B1 EP 1149239B1
Authority
EP
European Patent Office
Prior art keywords
pressure
internal combustion
combustion engine
fuel
pump
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.)
Expired - Lifetime
Application number
EP00910504A
Other languages
German (de)
French (fr)
Other versions
EP1149239A1 (en
Inventor
Helmut Rembold
Ferdinand Grob
Hartmut Bauer
Uwe Maienberg
Klaus Scherrbacher
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 EP1149239A1 publication Critical patent/EP1149239A1/en
Application granted granted Critical
Publication of EP1149239B1 publication Critical patent/EP1149239B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/38Pumps characterised by adaptations to special uses or conditions
    • F02M59/42Pumps characterised by adaptations to special uses or conditions for starting of engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven
    • F02M2037/085Electric circuits therefor
    • F02M2037/087Controlling fuel pressure valve

Definitions

  • the invention relates to a method for operating a Fuel supply system for an internal combustion engine in particular a motor vehicle in which fuel from pumped into a pressure accumulator and from Injectors directly into the internal combustion engine is injected.
  • the invention further relates to a Fuel supply system for an internal combustion engine in particular a motor vehicle with a pressure accumulator and a pump with which the pressure accumulator fuel is feedable, and with injectors with which Fuel can be injected directly into the internal combustion engine is.
  • the object of the invention is to provide a method for operating of a fuel supply system for one To create an internal combustion engine with which one as possible optimal starting of the engine is feasible.
  • This task is carried out in a procedure or a Fuel supply system of the type mentioned at the beginning solved according to the invention in that an electrical Fuel pump and a downstream electric High pressure pump to pump the fuel into the Pressure accumulators are provided together with the ignition be turned on to one for injection to generate sufficient pressure in the pressure accumulator.
  • an electric pump for generation of pressure used.
  • This electric pump is put together with the ignition and therefore preferably before the starter switched on. So that the electric pump pressure required for normal operation in the Pressure accumulator built up to the actual starting process become.
  • the method according to the invention can also be in the form of a Control can be realized for a control unit an internal combustion engine, in particular one Motor vehicle is provided. It is on the Control stored a program on a Computing device, in particular on a microprocessor, executable and for executing the invention Process is suitable. Can be used as a control in particular an electrical storage medium for use come, for example a read-only memory.
  • Fuel supply system 1 shows a fuel supply system 1 shown for use in an internal combustion engine a motor vehicle is provided.
  • Fuel supply system 1 is a so-called common rail system, which is particularly in one Internal combustion engine with gasoline direct injection Application comes.
  • the fuel supply system 1 has a pressure accumulator 2 on, with a pressure sensor 3 and a Pressure control valve (DSV) 4 is provided.
  • the accumulator 2 is via a pressure line 5 with a mechanical High pressure pump 6 connected.
  • the high pressure pump 6 is with coupled to the internal combustion engine and generates one High pressure with the internal combustion engine rotating.
  • the High pressure pump 6 is connected via a pressure line 8 to the Pressure control valve 4 is connected.
  • Over a Pressure line 9 and a filter is the pressure control valve 4 and thus also the high pressure pump 6 with an electric one
  • Fuel pump 10 connected, which is suitable Suck fuel from a fuel tank 11.
  • the electric fuel pump 10 generates pressure as soon as there is a tension on it. This is at least briefly the case when the ignition of the motor vehicle is turned on is.
  • the fuel supply system 1 has four Injectors 13 on the pressure lines 14 with the Pressure accumulator 2 are connected.
  • the injectors 13 are suitable for fuel in appropriate combustion chambers to inject the internal combustion engine.
  • the pressure sensor 3 is connected by means of a signal line 15 connected to a control unit 16 to which a further A plurality of signal lines other than input lines are connected.
  • a signal line 17 Fuel pump 10 and via a signal line 18 is that Pressure control valve 4 connected to the control unit 16.
  • Pressure control valve 4 connected to the control unit 16.
  • Of the injection valves 13 are also means Signal lines 19 connected to the control unit 16.
  • the fuel from the fuel pump 10 to the fuel tank 11 the high pressure pump 6 is pumped.
  • a pressure is generated in the pressure accumulator 2 the pressure sensor 3 is measured and by a corresponding actuation of the pressure control valve 4 and / or Control of the fuel pump 10 to a desired value can be controlled and / or regulated.
  • About the Injector 13 is then the fuel in the Combustion chambers of the internal combustion engine injected.
  • the quantity of fuel to be injected is, among others Pressure in the pressure accumulator 2 is essential.
  • This pressure in the pressure accumulator 2 can be from can be controlled and / or regulated by the control unit 16.
  • control unit 16 controls, for example Pressure control valve 4 in its closed state, so that the high pressure pump 6 and fuel pump 10 always one Generate further increasing pressure in the pressure accumulator 2. This increasing pressure can be from the pressure sensor 3 be measured.
  • control device 16 Speed of the fuel pump 10 increases, resulting in a increased delivery capacity of the fuel pump 10 leads and has an increased pressure in the pressure accumulator 2.
  • the increase in this pressure and thus the increase in Speed or the delivery rate of the fuel pump 10 can also be determined via the pressure sensor 3.
  • the ignition is the Internal combustion engine not yet switched on and the Starter of the internal combustion engine has not yet been actuated.
  • the starter moves Internal combustion engine in a rotary motion.
  • the starter it is preferably a so-called starter generator or similar.
  • the speed N of the Internal combustion engine becomes non-zero and rises quickly on.
  • the starter reaches within a low Duration, preferably within a few revolutions of the Internal combustion engine about the idle speed NL the Internal combustion engine.
  • Pressure control valve 4 Before time t1, i.e. before switching on the ignition and before starting the starter, it can Pressure control valve 4 opened in any state or be closed.
  • Pressure accumulator 2 is the one required for normal operation There is pressure.
  • the pressure control valve 4 is thus with the Cycle ratio N controlled according to normal operation and / or regulated.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Verfahren zum Betreiben eines Kraftstoffversorgungssystems für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs, bei dem Kraftstoff von einer Pumpe in einen Druckspeicher gepumpt und von Einspritzventilen direkt in die Brennkraftmaschine eingespritzt wird. Des weiteren betrifft die Erfindung ein Kraftstoffversorgungssystem für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs mit einem Druckspeicher und einer Pumpe, mit der dem Druckspeicher Kraftstoff zuführbar ist, und mit Einspritzventilen, mit denen Kraftstoff direkt in die Brennkraftmaschine einspritzbar ist.The invention relates to a method for operating a Fuel supply system for an internal combustion engine in particular a motor vehicle in which fuel from pumped into a pressure accumulator and from Injectors directly into the internal combustion engine is injected. The invention further relates to a Fuel supply system for an internal combustion engine in particular a motor vehicle with a pressure accumulator and a pump with which the pressure accumulator fuel is feedable, and with injectors with which Fuel can be injected directly into the internal combustion engine is.

Ein derartiges Verfahren und eine derartige Brennkraftmaschine sind aus der DE 33 04 605 A bekannt. Dort wird der Druck in einem Druckspeicher mittels einer elektromotorisch betriebenen Hochdruckpumpe erzeugt.Such a method and such Internal combustion engines are known from DE 33 04 605 A. There the pressure is stored in a pressure accumulator high-pressure pump operated by an electric motor.

Weiterer Stand der Technik ist aus der US-A-5 598 817 bekanntFurther prior art is from US-A-5 598 817 known

An eine Brennkraftmaschine beispielsweise eines Kraftfahrzeugs werden immer höhere Anforderungen im Hinblick auf eine Reduzierung des Kraftstoffverbrauchs und der erzeugten Abgase bei einer gleichzeitig erwünschten erhöhten Leistung gestellt. Zu diesem Zweck sind moderne Brennkraftmaschinen mit einem Kraftstoffversorgungssystem versehen, bei dem die Zuführung von Kraftstoff in den Brennraum der Brennkraftmaschine elektronisch, insbesondere mit einem rechnergestützten Steuergerät, gesteuert und/oder geregelt wird.To an internal combustion engine, for example Motor vehicle are increasingly demanding in With a view to reducing fuel consumption and of the exhaust gases generated at a simultaneously desired increased performance. To this end, modern ones Internal combustion engines with a fuel supply system provided, in which the supply of fuel in the Combustion chamber of the internal combustion engine electronically, in particular with a computer-aided control unit, controlled and / or is regulated.

Bei der sogenannten Benzin-Direkteinspritzung ist es erforderlich, daß der Kraftstoff unter Druck in den Brennraum eingespritzt wird. Zu diesem Zweck ist ein Druckspeicher vorgesehen, in den der Kraftstoff mittels einer Pumpe gepumpt und unter einen hohen Druck gesetzt wird. Von dort wird der Kraftstoff dann über Einspritzventile in die Brennräume der Brennkraftmaschine eingespritzt.It is with the so-called gasoline direct injection required that the fuel is under pressure in the Combustion chamber is injected. For this purpose is a Pressure accumulator is provided in which the fuel by means of pumped and placed under high pressure becomes. From there the fuel is then over Injectors in the combustion chambers of the internal combustion engine injected.

Beim Starten der Brennkraftmaschine ist der vorgenannte hohe Druck zumeist nicht oder zumindest nicht sofort vorhanden. Das Starten der Brennkraftmaschine muß deshalb gesondert gesteuert und/oder geregelt werden. Dabei sind die bereits erwähnten Randbedingungen wie z.B. geringer Schadstoffausstoß zu erfüllen.When starting the internal combustion engine is the aforementioned high pressure mostly not or at least not immediately available. The engine must therefore be started be controlled and / or regulated separately. Are the boundary conditions already mentioned, e.g. less To meet pollutant emissions.

Aufgabe der Erfindung ist es, ein Verfahren zum Betreiben eines Kraftstoffversorgungssystems für eine Brennkraftmaschine zu schaffen, mit dem ein möglichst optimales Starten der Brennkraftmaschine durchführbar ist.The object of the invention is to provide a method for operating of a fuel supply system for one To create an internal combustion engine with which one as possible optimal starting of the engine is feasible.

Diese Aufgabe wird bei einem Verfahren bzw. einem Kraftstoffversorgungssystem der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß eine elektrische Kraftstoffpumpe und eine nachgeordnete elektrische Hochdruckpumpe zum Pumpen des Kraftstoffs in den Druckspeicher vorgesehen sind, die zusammen mit der Zündung eingeschaltet werden, um einen für die Einspritzung ausreichenden Druck in dem Druckspeicher zu erzeugen.This task is carried out in a procedure or a Fuel supply system of the type mentioned at the beginning solved according to the invention in that an electrical Fuel pump and a downstream electric High pressure pump to pump the fuel into the Pressure accumulators are provided together with the ignition be turned on to one for injection to generate sufficient pressure in the pressure accumulator.

Bei der Erfindung wird eine elektrische Pumpe zur Erzeugung des Drucks verwendet. Diese elektrische Pumpe wird zusammen mit der Zündung und damit vorzugsweise vor dem Anlasser eingeschaltet. Damit kann von der elektrischen Pumpe der für den Normalbetrieb erforderliche Druck in dem Druckspeicher bis zum eigentlichen Anlaßvorgang aufgebaut werden.In the invention, an electric pump for generation of pressure used. This electric pump is put together with the ignition and therefore preferably before the starter switched on. So that the electric pump pressure required for normal operation in the Pressure accumulator built up to the actual starting process become.

Damit ist es möglich, daß keine aufwendigen Steuerungen und/oder Regelungen für das Starten der Brennkraftmaschine erforderlich sind. Stattdessen kann die Brennkraftmaschine im wesentlichen sofort entsprechend ihrem Normalbetrieb gesteuert und/oder geregelt werden. Die Erfindung ermöglicht also ein Starten der Brennkraftmaschine unter Bedingungen, die dem Normalbetrieb der Brennkraftmaschine entsprechen.So it is possible that no complex controls and / or regulations for starting the internal combustion engine required are. Instead, the engine essentially immediately according to their normal operation controlled and / or regulated. The invention thus allows the engine to start under Conditions that affect the normal operation of the internal combustion engine correspond.

Bei einer vorteilhaften Weiterbildung der Erfindung wird der ausreichende Druck sofort nach dem Starten der Brennkraftmaschine erzeugt. Damit wird das Starten der Brennkraftmaschine mittels der Steuerung und/oder Regelung entsprechend dem Normalbetrieb weiter verbessert.In an advantageous development of the invention the sufficient pressure immediately after starting the Internal combustion engine generated. This will start the Internal combustion engine by means of the control and / or regulation further improved according to normal operation.

Das erfindungsgemäße Verfahren kann auch in der Form eines Steuerelements realisiert werden, das für ein Steuergerät einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, vorgesehen ist. Dabei ist auf dem Steuerelement ein Programm abgespeichert, das auf einem Rechengerät, insbesondere auf einem Mikroprozessor, ablauffähig und zur Ausführung des erfindungsgemäßen Verfahrens geeignet ist. Als Steuerelement kann insbesondere ein elektrisches Speichermedium zur Anwendung kommen, beispielsweise ein Read-Only-Memory.The method according to the invention can also be in the form of a Control can be realized for a control unit an internal combustion engine, in particular one Motor vehicle is provided. It is on the Control stored a program on a Computing device, in particular on a microprocessor, executable and for executing the invention Process is suitable. Can be used as a control in particular an electrical storage medium for use come, for example a read-only memory.

Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in den Figuren der Zeichnung dargestellt sind.

Figur 1
zeigt eine schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Kraftstoffversorgungssystems.
Further features, possible applications and advantages result from the following description of exemplary embodiments of the invention, which are shown in the figures of the drawing.
Figure 1
shows a schematic representation of an embodiment of a fuel supply system according to the invention.

In der Figur 1 ist ein Kraftstoffversorgungssystem 1 dargestellt, das zur Verwendung in einer Brennkraftmaschine eines Kraftfahrzeugs vorgesehen ist. Bei dem Kraftstoffversorgungssystem 1 handelt es sich um ein sogenanntes Common-Rail-System, das insbesondere bei einer Brennkraftmaschine mit Benzin-Direkteinspritzung zur Anwendung kommt.1 shows a fuel supply system 1 shown for use in an internal combustion engine a motor vehicle is provided. In which Fuel supply system 1 is a so-called common rail system, which is particularly in one Internal combustion engine with gasoline direct injection Application comes.

Es wird zuerst eine Ausführungsform des Kraftstoffversorgungssystems 1 beschrieben, die nicht der Erfindung entspricht.First, an embodiment of the Fuel supply system 1 described, which is not the Invention corresponds.

Das Kraftstoffversorgungssystem 1 weist einen Druckspeicher 2 auf, der mit einem Drucksensor 3 und einem Drucksteuerventil (DSV) 4 versehen ist. Der Druckspeicher 2 ist über eine Druckleitung 5 mit einer mechanischen Hochdruckpumpe 6 verbunden. Die Hochdruckpumpe 6 ist mit der Brennkraftmaschine gekoppelt und erzeugt einen Hochdruck bei sich drehender Brennkraftmaschine. Die Hochdruckpumpe 6 ist über eine Druckleitung 8 an das Drucksteuerventil 4 angeschlossen ist. Über eine Druckleitung 9 und ein Filter ist das Drucksteuerventil 4 und damit auch die Hochdruckpumpe 6 mit einer elektrischen Kraftstoffpumpe 10 verbunden, die dazu geeignet ist, Kraftstoff aus einem Kraftstoffbehälter 11 anzusaugen. Die elektrische Kraftstoffpumpe 10 erzeugt einen Druck, sobald eine Spannung an ihr anliegt. Dies ist zumindest kurzzeitig der Fall, wenn die Zündung des Kraftfahrzeugs eingeschaltet ist.The fuel supply system 1 has a pressure accumulator 2 on, with a pressure sensor 3 and a Pressure control valve (DSV) 4 is provided. The accumulator 2 is via a pressure line 5 with a mechanical High pressure pump 6 connected. The high pressure pump 6 is with coupled to the internal combustion engine and generates one High pressure with the internal combustion engine rotating. The High pressure pump 6 is connected via a pressure line 8 to the Pressure control valve 4 is connected. Over a Pressure line 9 and a filter is the pressure control valve 4 and thus also the high pressure pump 6 with an electric one Fuel pump 10 connected, which is suitable Suck fuel from a fuel tank 11. The electric fuel pump 10 generates pressure as soon as there is a tension on it. This is at least briefly the case when the ignition of the motor vehicle is turned on is.

Das Kraftstoffversorgungssystem 1 weist vier Einspritzventile 13 auf, die über Druckleitungen 14 mit dem Druckspeicher 2 verbunden sind. Die Einspritzventile 13 sind dazu geeignet, Kraftstoff in entsprechende Brennräume der Brennkraftmaschine einzuspritzen.The fuel supply system 1 has four Injectors 13 on the pressure lines 14 with the Pressure accumulator 2 are connected. The injectors 13 are suitable for fuel in appropriate combustion chambers to inject the internal combustion engine.

Mittels einer Signalleitung 15 ist der Drucksensor 3 mit einem Steuergerät 16 verbunden, an das des weiteren eine Mehrzahl anderer Signalleitungen als Eingangsleitungen angeschlossen sind. Mittels einer Signalleitung 17 ist die Kraftstoffpumpe 10 und über eine Signalleitung 18 ist das Drucksteuerventil 4 mit dem Steuergerät 16 verbunden. Des weiteren sind die Einspritzventile 13 mittels Signalleitungen 19 an das Steuergerät 16 angeschlossen.The pressure sensor 3 is connected by means of a signal line 15 connected to a control unit 16 to which a further A plurality of signal lines other than input lines are connected. By means of a signal line 17 Fuel pump 10 and via a signal line 18 is that Pressure control valve 4 connected to the control unit 16. Of the injection valves 13 are also means Signal lines 19 connected to the control unit 16.

Im Normalbetrieb der Brennkraftmaschine wird der Kraftstoff von der Kraftstoffpumpe 10 aus dem Kraftstoffbehälter 11 zu der Hochdruckpumpe 6 gepumpt. Mit Hilfe der Hochdruckpumpe 6 wird in dem Druckspeicher 2 ein Druck erzeugt, der von dem Drucksensor 3 gemessen wird und durch eine entsprechende Betätigung des Drucksteuerventils 4 und/oder Steuerung der Kraftstoffpumpe 10 auf einen gewünschten Wert gesteuert und/oder geregelt werden kann. Über die Einspritzventile 13 wird dann der Kraftstoff in die Brennräume der Brennkraftmaschine eingespritzt.In normal operation of the internal combustion engine, the fuel from the fuel pump 10 to the fuel tank 11 the high pressure pump 6 is pumped. With the help of the high pressure pump 6, a pressure is generated in the pressure accumulator 2 the pressure sensor 3 is measured and by a corresponding actuation of the pressure control valve 4 and / or Control of the fuel pump 10 to a desired value can be controlled and / or regulated. About the Injector 13 is then the fuel in the Combustion chambers of the internal combustion engine injected.

Für die Bemessung der in den jeweiligen Brennraum einzuspritzenden Kraftstoffmenge ist unter anderem der Druck in dem Druckspeicher 2 wesentlich. Je größer der Druck in dem Druckspeicher 2 ist, desto mehr Kraftstoff wird während derselben Einspritzzeit in den Brennraum eingespritzt. Dieser Druck in dem Druckspeicher 2 kann von dem Steuergerät 16 gesteuert und/oder geregelt werden.For the dimensioning of the respective combustion chamber The quantity of fuel to be injected is, among others Pressure in the pressure accumulator 2 is essential. The bigger the Pressure in the accumulator 2, the more fuel is in the combustion chamber during the same injection time injected. This pressure in the pressure accumulator 2 can be from can be controlled and / or regulated by the control unit 16.

Hierzu steuert das Steuergerät 16 beispielsweise das Drucksteuerventil 4 in seinen geschlossenen Zustand, so daß die Hochdruckpumpe 6 und Kraftstoffpumpe 10 einen immer weiter ansteigenden Druck in dem Druckspeicher 2 erzeugen. Dieser ansteigende Druck kann von dem Drucksensor 3 gemessen werden.For this purpose, control unit 16 controls, for example Pressure control valve 4 in its closed state, so that the high pressure pump 6 and fuel pump 10 always one Generate further increasing pressure in the pressure accumulator 2. This increasing pressure can be from the pressure sensor 3 be measured.

Ebenfalls ist es möglich, daß das Steuergerät 16 die Drehzahl der Kraftstoffpumpe 10 erhöht, was zu einer erhöhten Förderleistung der Kraftstoffpumpe 10 führt und einen erhöhten Druck in dem Druckspeicher 2 zur Folge hat. Das Ansteigen dieses Drucks und damit das Ansteigen der Drehzahl bzw. der Förderleistung der Kraftstoffpumpe 10 kann ebenfalls über der Drucksensor 3 ermittelt werden.It is also possible that the control device 16 Speed of the fuel pump 10 increases, resulting in a increased delivery capacity of the fuel pump 10 leads and has an increased pressure in the pressure accumulator 2. The increase in this pressure and thus the increase in Speed or the delivery rate of the fuel pump 10 can also be determined via the pressure sensor 3.

Zum Starten der Brennkraftmaschine müssen eine Mehrzahl von besonderen Randbedingungen berücksichtigt werden. Dies wird durch das folgende Verfahren von dem Steuergerät 16 durchgeführt. Dabei können die einzelnen Schritte des Verfahrens z.B. als Module eines Programms oder dergleichen in dem Steuergerät 16 realisiert sein.To start the internal combustion engine, a plurality of special boundary conditions are taken into account. this will by the following procedure from the controller 16 carried out. The individual steps of the Process e.g. as modules of a program or the like be realized in the control unit 16.

Vor einem Zeitpunkt t1 ist die Zündung der Brennkraftmaschine noch nicht eingeschaltet und der Anlasser der Brennkraftmaschine noch nicht betätigt.Before a time t1, the ignition is the Internal combustion engine not yet switched on and the Starter of the internal combustion engine has not yet been actuated.

In dem Zeitpunkt t1 wird die Zündung der Brennkraftmaschine eingeschaltet, der Anlasser führt jedoch noch keine Drehbewegung aus. Dies ist gleichbedeutend damit, daß ein Benutzer des Kraftfahrzeugs die Brennkraftmaschine starten will, die Brennkraftmaschine aber noch keine Drehbewegung ausführt. Ab dem Zeitpunkt t1 bis zum Zeitpunkt t2 bleibt die Zündung eingeschaltet und der Anlasser noch nicht betätigt. In dem Zeitraum zwischen den Zeitpunkten t1 und t2 wird bzw. bleibt das Drucksteuerventil 4 geschlossen. Hierzu wird ein vorzugsweise konstantes Taktverhältnis K über die Signalleitung 18 an das Drucksteuerventil 4 gegeben.At time t1, the ignition of the internal combustion engine switched on, but the starter does not yet run Rotary motion. This is equivalent to the fact that a Motor vehicle users start the internal combustion engine wants, but the internal combustion engine does not yet have a rotary movement performs. From time t1 to time t2 remains the ignition is switched on and the starter is not yet actuated. In the period between times t1 and t2, the pressure control valve 4 is or remains closed. For this purpose, a preferably constant cycle ratio K via the signal line 18 to the pressure control valve 4 given.

Im Zeitpunkt t2 versetzt der Anlasser die Brennkraftmaschine in eine Drehbewegung. Bei dem Anlasser handelt es sich vorzugsweise um einen sogenannten Starter-Generator oder dergleichen. Die Drehzahl N der Brennkraftmaschine wird ungleich Null und steigt schnell an. Der Anlasser erreicht innerhalb einer geringen Zeitdauer, vorzugsweise innerhalb weniger Umdrehungen der Brennkraftmaschine etwa die Leerlaufdrehzahl NL der Brennkraftmaschine.At time t2 the starter moves Internal combustion engine in a rotary motion. At the starter it is preferably a so-called starter generator or similar. The speed N of the Internal combustion engine becomes non-zero and rises quickly on. The starter reaches within a low Duration, preferably within a few revolutions of the Internal combustion engine about the idle speed NL the Internal combustion engine.

Nach dem Zeitpunkt t2 wird ein Tastverhältnis N über die Signalleitung 18 an das Drucksteuerventil 4 gegeben, das entsprechend einem Normalbetrieb der Brennkraftmaschine erzeugt wird. Dieser Normalbetrieb wurde bereits erläutert. Aufgrund der nach wenigen Umdrehungen des Anlasser bereits vorhandenen Leerlaufdrehzahl der Brennkraftmaschine wird in dem Druckspeicher 2 sofort ein hoher Druck erzeugt. Bei diesem hohen Druck führt die Steuerung und/oder Regelung der Brennkraftmaschine entsprechend dem Normalbetrieb zu einem Starten der Brennkraftmaschine.After the time t2, a duty cycle N over the Given signal line 18 to the pressure control valve 4, the corresponding to normal operation of the internal combustion engine is produced. This normal operation has already been explained. Due to that after just a few turns of the starter existing idle speed of the internal combustion engine is in the pressure accumulator 2 immediately generates a high pressure. at The control and / or regulation leads to this high pressure the internal combustion engine according to normal operation a starting of the internal combustion engine.

Sobald die Brennkraftmaschine aufgrund der ausgeführten Einspritzungen von Kraftstoff in die Brennräume derselben aus eigener Kraft eine Drehbewegung ausführt, steigt die Drehzahl N der Brennkraftmaschine weiter an. Die Brennkraftmaschine ist gestartet.Once the internal combustion engine is running due to the Injections of fuel into their combustion chambers performs a rotary motion under its own power, it increases Engine speed N continues to increase. The Internal combustion engine has started.

Insgesamt ergibt sich damit der folgende Startvorgang der Brennkraftmaschine:Overall, this results in the following starting process Engine:

Vor dem Zeitpunkt t1, also vor dem Einschalten der Zündung und vor dem Starten des Anlassers, kann das Drucksteuerventil 4 in irgendeinem Zustand geöffnet oder geschlossen sein.Before time t1, i.e. before switching on the ignition and before starting the starter, it can Pressure control valve 4 opened in any state or be closed.

Im Zeitpunkt t1, also sobald die Zündung des Kraftfahrzeugs eingeschaltet wird, wird das Drucksteuerventil 4 geschlossen. Dieser Zustand wird bis zum Zeitpunkt t2 beibehalten, also bis der Anlasser betätigt wird. Damit ist der Druck in dem Druckspeicher 2 in diesem Zeitraum abhängig von dem vor dem Zeitpunkt t1 vorhandenen Druck sowie von dem von der elektrischen Kraftstoffpumpe 10 erzeugten Druck.At time t1, that is as soon as the ignition of the motor vehicle is switched on, the pressure control valve 4 closed. This state will continue until time t2 maintained, i.e. until the starter is actuated. So that is the pressure in the pressure accumulator 2 during this period depending on the pressure existing before time t1 and that of the electric fuel pump 10 generated pressure.

Ab dem Zeitpunkt t2, also bei eingeschalteter Zündung und sich drehendem Anlasser, wird das Drucksteuerventil 4 entsprechend einem Normalbetrieb der Brennkraftmaschine gesteuert und/oder geregelt. Die elektrische Kraftstoffpumpe 10 ist eingeschaltet. Aufgrund der Leerlaufdrehzahl des Anlassers kommt die Hochdruckpumpe 6 im wesentlichen sofort voll zur Wirkung. Damit ist der Druck in dem Druckspeicher 2 ab dem Zeitpunkt t2 weitgehend von der Hochdruckpumpe 6 abhängig. Der Druck in dem Druckspeicher 2 erreicht damit nahezu sofort seinen im Normalbetrieb vorhandenen Wert, so daß der für die Einspritzung von Kraftstoff über die Einspritzventile 13 in die Brennräume der Brennkraftmaschine erforderliche Druck ebenfalls nahezu sofort vorhanden ist. From time t2, i.e. with the ignition on and rotating starter, the pressure control valve 4 corresponding to normal operation of the internal combustion engine controlled and / or regulated. The electrical Fuel pump 10 is switched on. Due to the The idle speed of the starter comes high pressure pump 6 essentially fully effective immediately. So that's the Pressure in the pressure accumulator 2 largely from the time t2 dependent on the high pressure pump 6. The pressure in that Pressure accumulator 2 thus reaches its im almost immediately Normal operation existing value, so that for the Fuel injection via injectors 13 in the combustion chambers of the internal combustion engine required pressure is also available almost immediately.

Es wird nunmehr eine Ausführungsform des Kraftstoffversorgungssystems 1 beschrieben, die der Erfindung entspricht. Auf die vorstehenden Erläuterungen wird dabei Bezug genommen.An embodiment of the Fuel supply system 1 described, the Invention corresponds. On the above explanations is referred to.

Bei der Ausführungsform gemäß der Erfindung ist keine mit der Brennkraftmaschine gekoppelte, mechanische Hochdruckpumpe 6 vorhanden, sondern eine elektrische Hochdruckpumpe 6'. Diese elektrische Hochdruckpumpe 6' ist über die in der Figur 1 gestrichelt dargestellte Signalleitung 17' mit dem Steuergerät 16 verbunden.In the embodiment according to the invention, none is included coupled to the internal combustion engine, mechanical High pressure pump 6 available, but an electric one High pressure pump 6 '. This electric high pressure pump 6 'is over the dashed line shown in Figure 1 Signal line 17 'connected to the control unit 16.

Im Zeitpunkt t1 wird nicht nur die elektrische Kraftstoffpumpe 10, sondern auch die elektrische Hochdruckpumpe 6' eingeschaltet. Das Drucksteuerventil 4 ist durch das Taktverhältnis K geschlossen. Damit wird von der Hochdruckpumpe 6' ein Druck in dem Druckspeicher 2 aufgebaut. Die elektrische Hochdruckpumpe 6' ist derart ausgebildet und dimensioniert, daß innerhalb einer geringen Zeitdauer, vorzugsweise innerhalb von wenigen Umdrehungen der Brennkraftmaschine bereits der für die Einspritzung von Kraftstoff in die Brennräume der Brennkraftmaschine ausreichende Druck in dem Druckspeicher 2 vorhanden ist.At time t1, not only is the electrical Fuel pump 10, but also the electric one High pressure pump 6 'switched on. The pressure control valve 4 is closed by the clock ratio K. So that from a pressure in the pressure accumulator 2 built up. The electric high pressure pump 6 'is like this trained and dimensioned that within a small Duration, preferably within a few revolutions the internal combustion engine is already the one for the injection of Fuel into the combustion chambers of the internal combustion engine sufficient pressure is present in the pressure accumulator 2.

Wird der Anlasser im Zeitpunkt t2, also nach einer gewissen Zeitdauer nach dem Zeitpunkt t1 eingeschaltet, so ist im Druckspeicher 2 der für den Normalbetrieb erforderliche Druck vorhanden. Das Drucksteuerventil 4 wird damit mit dem Taktverhältnis N entsprechend dem Normalbetrieb gesteuert und/oder geregelt.Will the starter at time t2, that is after a certain Period switched on after the time t1, so is in Pressure accumulator 2 is the one required for normal operation There is pressure. The pressure control valve 4 is thus with the Cycle ratio N controlled according to normal operation and / or regulated.

Selbst wenn der Anlasser zusammen mit der Zündung des Kraftfahrzeugs eingeschaltet wird, selbst wenn also die Zeitpunkte t1 und t2 zusammenfallen, so erreicht der Druck in dem Druckspeicher 2 schon nach wenigen Umdrehungen der Brennkraftmaschine, also nahezu sofort seinen im Normalbetrieb vorhandenen Wert. Die Brennkraftmaschine kann damit auch in diesem Fall ab dem Zeitpunkt t2 im Normalbetrieb betrieben werden.Even if the starter together with the ignition of the Motor vehicle is turned on, even if the When t1 and t2 coincide, the pressure reaches in the pressure accumulator 2 after only a few revolutions Internal combustion engine, so its almost immediately Normal operation existing value. The internal combustion engine can thus also in this case from time t2 in Normal operation.

Claims (3)

  1. Method for operating a fuel supply system (1) for an internal combustion engine particularly of a motor vehicle, in which fuel is pumped into a pressure accumulator (2) and is injected directly into the internal combustion engine by means of injection valves (13), characterized in that an electric fuel pump (10) and a following electric high-pressure pump (6') for pumping the fuel into the pressure accumulator (2) are provided, which are switched on, together with the ignition, in order to generate in the pressure accumulator (2) a pressure which is sufficient for injection.
  2. Method according to Claim 1, characterized in that the sufficient pressure is generated immediately after the starting of the internal combustion engine.
  3. Fuel supply system (1) for an internal combustion engine particularly of a motor vehicle, with a pressure accumulator (2) and with a pump (6', 10), by means of which fuel can be supplied to the pressure accumulator (2), and with injection valves (13), by means of which fuel can be injected directly into the internal combustion engine, characterized in that an electric fuel pump (10) and a following electric high-pressure pump (6') for pumping the fuel into the pressure accumulator (2) are provided, which are switched on, together with the ignition, in order to generate in the pressure accumulator (2) a pressure which is sufficient for injection.
EP00910504A 1999-01-28 2000-01-27 Fuel supply system for an internal combustion engine, especially a motor vehicle Expired - Lifetime EP1149239B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19903272A DE19903272A1 (en) 1999-01-28 1999-01-28 Fuel supply system for an internal combustion engine, in particular of a motor vehicle
DE19903272 1999-01-28
PCT/DE2000/000229 WO2000045047A1 (en) 1999-01-28 2000-01-27 Fuel supply system for an internal combustion engine, especially a motor vehicle

Publications (2)

Publication Number Publication Date
EP1149239A1 EP1149239A1 (en) 2001-10-31
EP1149239B1 true EP1149239B1 (en) 2003-04-16

Family

ID=7895598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00910504A Expired - Lifetime EP1149239B1 (en) 1999-01-28 2000-01-27 Fuel supply system for an internal combustion engine, especially a motor vehicle

Country Status (6)

Country Link
US (1) US6712044B1 (en)
EP (1) EP1149239B1 (en)
JP (1) JP2002539349A (en)
DE (2) DE19903272A1 (en)
ES (1) ES2197080T3 (en)
WO (1) WO2000045047A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10038555A1 (en) * 2000-08-03 2002-02-21 Bosch Gmbh Robert Fuel supply system for an internal combustion engine, in particular of a motor vehicle
DE10038565C2 (en) * 2000-08-03 2002-08-14 Bosch Gmbh Robert Fuel supply system for an internal combustion engine, in particular of a motor vehicle
DE10038560B4 (en) 2000-08-03 2006-06-29 Robert Bosch Gmbh Fuel supply system for an internal combustion engine, in particular of a motor vehicle
DE10042356A1 (en) * 2000-08-29 2002-03-14 Siemens Ag Process for shortening the starting time in internal combustion engines with a storage injection system
JP4587557B2 (en) * 2000-11-15 2010-11-24 ヤマハ発動機株式会社 Fuel supply device for internal combustion engine of small ship
JP3908480B2 (en) * 2001-05-16 2007-04-25 ボッシュ株式会社 Operation control method in fuel injection device and fuel injection device
US7318414B2 (en) * 2002-05-10 2008-01-15 Tmc Company Constant-speed multi-pressure fuel injection system for improved dynamic range in internal combustion engine
JP2004218571A (en) * 2003-01-16 2004-08-05 Aisan Ind Co Ltd Fuel system for engine
JP4090382B2 (en) * 2003-04-21 2008-05-28 株式会社日立製作所 Fuel supply apparatus for in-cylinder injection internal combustion engine
DE102004016943B4 (en) 2004-04-06 2006-06-29 Siemens Ag Method for controlling a fuel supply device of an internal combustion engine
US8807115B2 (en) 2009-05-14 2014-08-19 Advanced Diesel Concepts, Llc Compression ignition engine and method for controlling same
US7861684B2 (en) * 2009-05-14 2011-01-04 Advanced Diesel Concepts Llc Compression ignition engine and method for controlling same
DE102019112754B4 (en) * 2019-05-15 2021-06-24 Man Energy Solutions Se Method and control device for operating a common rail fuel supply system
DE102020206493A1 (en) * 2020-05-25 2021-11-25 Hyundai Motor Company Fuel pump for a liquid fuel injection system of a motor vehicle
DE102020213200A1 (en) 2020-10-20 2022-04-21 Robert Bosch Gesellschaft mit beschränkter Haftung Procedure for detecting faults in the operation of a fuel supply system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT380540B (en) * 1982-02-12 1986-06-10 Steyr Daimler Puch Ag FUEL INJECTION SYSTEM FOR AN ELECTRICAL ENGINE, INCLUDING A STARTER LOCK, WITH DIESEL ENGINES
US5598817A (en) * 1993-09-10 1997-02-04 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Fuel feeding system for internal combustion engine
JPH08210209A (en) * 1995-02-06 1996-08-20 Zexel Corp High pressure fuel injector
WO1997008456A1 (en) * 1995-08-31 1997-03-06 Isad Electronic Systems Gmbh & Co. Kg Starter/generator for an internal combustion engine, in particular a vehicle engine
DE19607070B4 (en) * 1996-02-24 2013-04-25 Robert Bosch Gmbh Method and device for controlling an internal combustion engine
JP3333407B2 (en) * 1996-10-17 2002-10-15 株式会社ユニシアジェックス Fuel supply system for direct injection gasoline internal combustion engine
FR2763100B1 (en) * 1997-05-09 1999-07-23 Magneti Marelli France RELIEF BYPASS FOR HIGH PRESSURE DIRECT INJECTION PUMP
DE19753155A1 (en) * 1997-11-29 1999-06-02 Mannesmann Rexroth Ag Fuel supply system for an internal combustion engine and high pressure pump used therein

Also Published As

Publication number Publication date
US6712044B1 (en) 2004-03-30
EP1149239A1 (en) 2001-10-31
ES2197080T3 (en) 2004-01-01
DE19903272A1 (en) 2000-08-03
JP2002539349A (en) 2002-11-19
DE50001789D1 (en) 2003-05-22
WO2000045047A1 (en) 2000-08-03

Similar Documents

Publication Publication Date Title
EP1149239B1 (en) Fuel supply system for an internal combustion engine, especially a motor vehicle
DE102004059656B4 (en) Actuator system and fuel injection system
DE102005017019A1 (en) A fuel injection system that performs an overlap injection operation
EP1068435B1 (en) Fuel supply system for an internal combustion engine, especially of a motor vehicle
DE10304449A1 (en) Method for controlling a direct injection of an internal combustion engine
EP1495222B1 (en) Method for monitoring an internal combustion engine
EP1090221B1 (en) Method for operating an internal combustion engine, especially of an automobile
DE10341775B4 (en) Fuel type fuel injection system
DE10240069A1 (en) Common rail fuel injection system with guaranteed starting capability for diesel engines, varies quantity of fuel delivered to common rail to regulate pressure in common rail
DE102011086948A1 (en) Method and device for controlling an internal combustion engine
EP1438495A1 (en) Method, computer program, control and regulating appliance for operating an internal combustion engine, and internal combustion engine
DE10127516A1 (en) Operating internal combustion engine involves switching on additional electrically driven fuel pump at least for starting process to feed fuel directly to common fuel rail at raised pressure
DE102013100687A1 (en) Fuel injection controller for controlling fuel injection in fuel injector in internal combustion engine i.e. diesel engine, in vehicle, has property determining section determining fuel properties based on reduction amount of fuel pressure
DE10302058A1 (en) Combustion engine operating method, especially for fuel injector calibration, whereby the crankshaft is driven at constant speed using an electric motor during a calibration
DE102017200254A1 (en) Method and apparatus for operating an internal combustion engine with dual fuel metering
DE102004046812B4 (en) Combustion noise and momentum reducing fuel injection system
DE102007050304A1 (en) Method for controlling a fuel supply system of an internal combustion engine
DE10248408A1 (en) High pressure engine fuel pump with hybrid drive system, supplying common rail petrol injection system, has both mechanical and electrical drive systems
DE10315318A1 (en) Method for operating an internal combustion engine
DE102007058530A1 (en) Internal-combustion engine i.e. petrol engine, controlling method, involves closing exhaust valves of high pressure accumulator until idle condition of engine, and continuously operating high-pressure pump after stoppage requirement
DE10002132A1 (en) Regulating the drive torque of an internal combustion engine with common rail injection enables dynamic characteristics and ride comfort to be improved - involves temporarily feeding or extracting torque to or from engine's crankshaft using auxiliary generator for rapid setting of newly determined drive torque
DE102015220098B3 (en) Method and apparatus for operating an internal combustion engine with a high-pressure fuel injection system
DE102014007880B4 (en) Method for adjusting the pressure in a high-pressure system of a fuel injection system of an internal combustion engine and internal combustion engine for carrying out the method
EP1238190B1 (en) Method for improving the starting performance of an internal combustion engine comprising a high-pressure accumulator injection system
EP1199459A2 (en) Method for the starting up of an internal combustion engine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010828

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20011109

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE ES FR IT

REF Corresponds to:

Ref document number: 50001789

Country of ref document: DE

Date of ref document: 20030522

Kind code of ref document: P

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2197080

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040119

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20100122

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20100209

Year of fee payment: 11

Ref country code: IT

Payment date: 20100123

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110127

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20120220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110128

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150324

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50001789

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160802