EP1864014A1 - Fuel injection device for a multi-cylinder internal combustion engine - Google Patents

Fuel injection device for a multi-cylinder internal combustion engine

Info

Publication number
EP1864014A1
EP1864014A1 EP06701161A EP06701161A EP1864014A1 EP 1864014 A1 EP1864014 A1 EP 1864014A1 EP 06701161 A EP06701161 A EP 06701161A EP 06701161 A EP06701161 A EP 06701161A EP 1864014 A1 EP1864014 A1 EP 1864014A1
Authority
EP
European Patent Office
Prior art keywords
pressure
injectors
fuel injection
pressure pump
injector
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.)
Granted
Application number
EP06701161A
Other languages
German (de)
French (fr)
Other versions
EP1864014B1 (en
Inventor
Thomas Pauer
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 EP1864014A1 publication Critical patent/EP1864014A1/en
Application granted granted Critical
Publication of EP1864014B1 publication Critical patent/EP1864014B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other 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
    • F02M63/02—Fuel-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
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention is based on a
  • Fuel injection device for a multi-cylinder internal combustion engine according to the preamble of claim 1.
  • Fuel injection device has a high-pressure pump through which fuel in a high-pressure accumulator, a so-called rail, is promoted.
  • an injector for fuel injection is provided, wherein each injector is connected via a connected to a high-pressure port of the injector hydraulic line to the high-pressure accumulator.
  • a disadvantage of this fuel injection device is the large manufacturing and assembly costs, which is caused by the arranged between the high-pressure pump and the injectors high-pressure accumulator.
  • the high-pressure accumulator must have a high strength because of the pressure prevailing in this high pressure.
  • the space required in the environment of the internal combustion engine for the fuel injection device is increased by the high-pressure accumulator.
  • the fuel injection device according to the invention with the features according to claim 1 has the advantage that in this no high-pressure accumulator is required, thereby simplifying their production and assembly and their space requirement is reduced.
  • FIG. 1 shows a
  • Fuel injection device for an internal combustion engine in a simplified representation according to a first
  • Figure 2 an injector of
  • Fuel injection device in an enlarged view and Figures 3 to 10, the fuel injection device according to further embodiments.
  • Fuel injection device for a multi-cylinder internal combustion engine shown which is preferably a self-igniting internal combustion engine of a motor vehicle.
  • the fuel injector has a
  • High-pressure pump 10 through which fuel is conveyed under high pressure.
  • an injector 12 is arranged, through the fuel in the
  • FIGS. 1 to 10 show only some of the injectors 12, with further injectors being indicated by dots up to the last injector 12d.
  • the injector 12 has a fuel injection valve 14, through which fuel is injected into the combustion chamber of the cylinder, and an electrically actuated actuator 16.
  • the actuator 16 By the actuator 16, the opening and closing movement of an injection valve member 15 of the fuel injection valve 14 is controlled.
  • the actuator 16 is preferably a piezoelectric actuator that changes its size depending on an electrical voltage applied thereto. By this size change, a switching function can be achieved by means of which the injection valve member 15 can be opened or closed.
  • the actuator 16 is driven by an electronic control device 18.
  • the actuator 16 is arranged in a fuel-filled space 20 in a housing 22 of the injector 12.
  • the actuator 16 can act, for example, on a piston 17, by which a control chamber 19 is limited, wherein the injection valve member 15 is acted upon by the pressure prevailing in the control chamber 19 in the closing direction.
  • the piston 17 is held by a prestressed spring 21 in contact with the actuator 16.
  • the injection valve member 15 is also acted upon by a prestressed spring 23 in the closing direction.
  • High-pressure connections 24 are provided, via which high-pressure fuel is supplied to the injector 12 and is continued therefrom.
  • the high-pressure ports 24 are connected to the space 20 in which the actuator 16 is arranged.
  • the high-pressure ports 24 are connected to the fuel injection valve 14 through the space 20 to supply fuel necessary for fuel injection.
  • the space 20 forms a high-pressure accumulator, from which the fuel is taken for injection.
  • the space 20 has a sufficiently large volume in order to be able to store the fuel volume required for the fuel injection.
  • the volume of the space 20 may be between 1 and 5 cm 3 , for example about 2 cm 3 .
  • a first injector 12a of the injectors 12 is connected to the high-pressure pump 10, wherein a hydraulic line 26 leading away from the high-pressure outlet of the high-pressure pump 10 is connected to a high-pressure port 24 of the injector 12a.
  • the first injector 12a connected to the high-pressure pump 10 is the injector of the internal combustion engine that is closest to the high-pressure pump 10.
  • the cylinders of the internal combustion engine and thus also the associated injectors 12 are arranged in series.
  • a hydraulic line 27 is connected, which leads to another injector 12 b and with a high pressure port 24 of this injector 12b is connected.
  • the injector 12b is disposed adjacent to the first injector 12a.
  • a hydraulic line 27 which in turn leads to another, preferably adjacently disposed, injector 12 and is connected to a high-pressure connection 24 of this injector 12.
  • the last injector 12d is connected to the preceding adjacent injector only via a hydraulic line 27 connected to one of its two high-pressure ports 24, while a pressure sensor 28 is arranged at the other high-pressure port 24 thereof.
  • the pressure sensor 28 can also be arranged on another injector 12, in one of the hydraulic lines 27 between the injectors 12, in the hydraulic line 26 between the high-pressure pump 10 and the first injector 12a or on the high-pressure pump 10.
  • the injectors 12 of the cylinders of the internal combustion engine are hydraulically connected in series, with only the first injector 12a is connected directly to the high-pressure pump 10.
  • the pressure sensor 28 is connected to the electrical control device 18 and provides it with a signal for the pressure actually prevailing in the injectors 12.
  • a fuel metering device 30 is arranged, through which the sucked by the high pressure pump 10 and funded under high pressure fuel quantity can be changed.
  • a variable flow cross-section on the suction side of the high-pressure pump 10 can be set by the fuel metering device 30.
  • the suction side of the high pressure pump 10 fuel from a reservoir 32 is supplied by means of a feed pump 34, wherein the
  • Fuel metering device 30 between the feed pump 34th and the high-pressure pump 10 is arranged.
  • the fuel metering device 30 is controlled such that the high-pressure pump 10 delivers an amount of fuel under high pressure to the injectors 12, as required to maintain a predetermined pressure in the injectors 12 for the fuel injection.
  • the high-pressure pump 10 has only a single pump element, wherein the first
  • Injector 12a leading hydraulic line 26 is connected to the outlet of this pump element.
  • the high-pressure pump 10 has a plurality of pump elements, for example two or three pump elements, wherein the outlets of the pump elements are brought together to form a common connection to the high-pressure pump 10, to which the hydraulic line 26 leading to the first injector 12a is connected.
  • the fuel injection device is shown according to a second embodiment, in which the basic structure is the same as in the first embodiment. Deviating from the first exemplary embodiment, however, the last injector 12d is also connected directly to the high-pressure pump 10 via a hydraulic line 26 here. The last injector 12d is also connected to the adjacent injector via a hydraulic line 27 as in the first embodiment. Two high-pressure outlets are provided on the high-pressure pump 10, one of which is connected to the first injector 12a and the other to the last injector 12d.
  • the pressure sensor 28 may be disposed on one of the injectors 12, in a hydraulic line 27 between the injectors 12 or in a hydraulic line 26 between the high pressure pump 10 and one of the injectors 12 or on the high pressure pump 10.
  • the High-pressure pump 10 having only one pump element, it must be provided at this two high-pressure connections for connecting the two leading to the injectors 12a and 12d hydraulic lines 26. If the high pressure pump 10 has two pump elements, the hydraulic line 26 to the first injector 12a at the outlet the one pump element is connected and the hydraulic line 26 to the last injector 12d is connected to the outlet of the other pump element. When the high-pressure pump 10 has more than two pump elements, their outlets are combined to form two high-pressure ports on the high-pressure pump 10, with a hydraulic line 26 leading to an injector 12a or 12d being connected to each high-pressure port.
  • the fuel injection device in which the cylinders of the internal combustion engine are arranged in a V-shape, wherein in each row of cylinders a plurality of cylinders are arranged side by side. Only the first injector 12a of a first cylinder bank is directly connected to the high-pressure pump 10, and the remaining injectors 12 are connected in series via hydraulic conduits 27. The farthest from the high pressure pump 10 arranged injectors 12 of the two rows of cylinders are also connected to each other via a hydraulic line 27. At the next to the high-pressure pump 10 arranged injector 12d of the second row of cylinders, the pressure sensor 28 is arranged. The pressure sensor 28 can also be arranged at a different location, as indicated in the first embodiment. The construction of the high pressure pump 10 is as described in the first embodiment.
  • each of the high pressure pump 10 is arranged next injector 12 of each cylinder row via a respective hydraulic line 26 to the high pressure pump 10.
  • the remaining injectors 12 are each connected in series by the hydraulic lines 27.
  • the construction of the high pressure pump 10 is as described in the second embodiment.
  • FIG. 6 shows the fuel injection device according to a fifth exemplary embodiment, in which the basic structure is the same as in the first exemplary embodiment.
  • a pressure regulating valve 32 is provided, by which the pressure prevailing in the injectors 12 pressure can be changed.
  • the pressure control valve 32 may be arranged, for example, on the high-pressure pump 10.
  • the pressure sensor 28 may be disposed on the last injector 12d.
  • the pressure regulating valve 32 may also be arranged on the last injector 12d, as in a variant shown in FIG. 7, and the pressure sensor 28 may be arranged in one of the hydraulic lines 27 between the injectors 12.
  • the pressure control valve 32 and the pressure sensor 28 may also be at any other
  • the pressure control valve 32 is connected to the control device 18 and is controlled by the latter in order to set the pressure prevailing in the injectors 12 to a predetermined value.
  • the pressure control valve 32 is actuated by the control device 18, a very rapid change in the pressure prevailing in the injectors 12 can be achieved.
  • the controller 18 can be achieved that the high-pressure pump 10 at least substantially only for the
  • Fuel injection required amount of fuel below High pressure is delivered to the injectors 12, whereby the drive power for the high-pressure pump 10 can be kept low.
  • the fuel injection device is shown, which is formed substantially the same as the third embodiment with V-shaped arranged cylinders of the internal combustion engine and in which additionally the pressure control valve 32 is provided.
  • the connection of the injectors 12 with the high-pressure pump 10 via the hydraulic line 26 and with each other via the hydraulic lines 27 is the same as in the third embodiment, so that only the first injector 12 a is directly connected to the high-pressure pump 10.
  • the pressure regulating valve 32 is arranged, for example, on the high-pressure pump 10, and the pressure sensor 28 is arranged on the last injector 12d.
  • the pressure regulating valve 32 can also be arranged on the last injector 12d as in a variant shown in FIG. 9, and the pressure sensor 28 can be arranged in one of the hydraulic lines 27 between the injectors 12.
  • the pressure control valve 32 and the pressure sensor 28 may also be arranged at any other location.
  • FIG. 10 shows the fuel injection device according to a seventh exemplary embodiment, in which, unlike the sixth exemplary embodiment, in each case the injector 12 of the two cylinder rows arranged closest to the high-pressure pump 10 is connected to the high-pressure pump 10 via a respective hydraulic line 26.
  • the most distant from the high pressure pump 10 arranged injectors 12d of the two rows of cylinders are not connected to each other, but to each of which a pressure control valve 32 is arranged.
  • a pressure control valve 32 is arranged in one of the hydraulic lines 27 between the injectors 12 of the two
  • Cylinder rows each have a pressure sensor 28 is arranged.
  • the pressure control valve 32 and the pressure sensor 28 of the two rows of cylinders can also be arranged at any other point.

Landscapes

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

Abstract

The fuel injection apparatus has a high-pressure pump and has a respective injector for each cylinder of the engine, which injector is at least indirectly connected to the high-pressure pump via a hydraulic line. Each injector is connected to the high-pressure pump via a hydraulic line and/or to the injector of another cylinder of the engine. This makes it possible to eliminate the high-pressure accumulator that is usually provided between the high-pressure pump and the injectors.

Description

Kraftstoffeinspritzeinrichtung für eine mehrzylindrige BrennkraftmaschineFuel injection device for a multi-cylinder internal combustion engine
Stand der TechnikState of the art
Die Erfindung geht aus von einerThe invention is based on a
Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine nach der Gattung des Anspruchs 1.Fuel injection device for a multi-cylinder internal combustion engine according to the preamble of claim 1.
Eine solche Kraftstoffeinspritzeinrichtung ist durch die EP 0 299 337 A bekannt. DieseSuch a fuel injection device is known from EP 0 299 337 A. These
Kraftstoffeinspritzeinrichtung weist eine Hochdruckpumpe auf, durch die Kraftstoff in einen Hochdruckspeicher, ein sogenanntes Rail, gefördert wird. Für jeden Zylinder der Brennkraftmaschine ist ein Injektor zur Kraftstoffeinspritzung vorgesehen, wobei jeder Injektor über eine an einem Hochdruckanschluss des Injektors angeschlossene hydraulische Leitung mit dem Hochdruckspeicher verbunden ist. Nachteilig bei dieser Kraftstoffeinspritzeinrichtung ist der große Fertigungs- und Montageaufwand, der durch den zwischen der Hochdruckpumpe und den Injektoren angeordneten Hochdruckspeicher verursacht wird. Der Hochdruckspeicher muss wegen dem in diesem herrschenden Hochdruck eine große Festigkeit aufweisen. Darüberhinaus wird durch den Hochdruckspeicher der im Umfeld der Brennkraftmaschine für die Kraftstoffeinspritzeinrichtung erforderliche Bauraum vergrößert. Vorteile der ErfindungFuel injection device has a high-pressure pump through which fuel in a high-pressure accumulator, a so-called rail, is promoted. For each cylinder of the internal combustion engine, an injector for fuel injection is provided, wherein each injector is connected via a connected to a high-pressure port of the injector hydraulic line to the high-pressure accumulator. A disadvantage of this fuel injection device is the large manufacturing and assembly costs, which is caused by the arranged between the high-pressure pump and the injectors high-pressure accumulator. The high-pressure accumulator must have a high strength because of the pressure prevailing in this high pressure. In addition, the space required in the environment of the internal combustion engine for the fuel injection device is increased by the high-pressure accumulator. Advantages of the invention
Die erfindungsgemäße Kraftstoffeinspritzeinrichtung mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, dass bei dieser kein Hochdruckspeicher erforderlich ist, wodurch deren Fertigung und Montage vereinfacht und deren Bauraumbedarf reduziert ist.The fuel injection device according to the invention with the features according to claim 1 has the advantage that in this no high-pressure accumulator is required, thereby simplifying their production and assembly and their space requirement is reduced.
In den abhängigen Ansprüchen sind vorteilhafteIn the dependent claims are advantageous
Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Kraftstoffeinspritzeinrichtung angegeben .Embodiments and developments of the fuel injection device according to the invention specified.
Zeichnungdrawing
Mehrere Ausführungsbeispiele der Erfindung sind in derSeveral embodiments of the invention are in the
Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eineDrawing shown and explained in more detail in the following description. FIG. 1 shows a
Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine in vereinfachter Darstellung gemäß einem erstenFuel injection device for an internal combustion engine in a simplified representation according to a first
Ausführungsbeispiel, Figur 2 einen Injektor derEmbodiment, Figure 2 an injector of
Kraftstoffeinspritzeinrichtung in vergrößerter Darstellung und die Figuren 3 bis 10 die Kraftstoffeinspritzeinrichtung gemäß weiteren Ausführungsbeispielen.Fuel injection device in an enlarged view and Figures 3 to 10, the fuel injection device according to further embodiments.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In den Figuren 1 bis 10 ist eineIn the figures 1 to 10 is a
Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine dargestellt, die vorzugsweise eine selbstzündende Brennkraftmaschine eines Kraftfahrzeugs ist.Fuel injection device for a multi-cylinder internal combustion engine shown, which is preferably a self-igniting internal combustion engine of a motor vehicle.
Die Kraftstoffeinspritzeinrichtung weist eineThe fuel injector has a
Hochdruckpumpe 10 auf, durch die Kraftstoff unter Hochdruck gefördert wird. An jedem Zylinder der Brennkraftmaschine ist ein Injektor 12 angeordnet, durch den Kraftstoff in denHigh-pressure pump 10, through which fuel is conveyed under high pressure. On each cylinder of the internal combustion engine, an injector 12 is arranged, through the fuel in the
Brennraum des Zylinders eingespritzt werden kann. In den Figuren 1 bis 10 sind dabei nur einige der Injektoren 12 dargestellt, wobei weitere Injektoren bis zum letzten Injektor 12d durch Punkte angedeutet sind. Der Injektor 12 weist wie in Figur 2 dargestellt ein Kraftstoffeinspritzventil 14, durch das Kraftstoff in den Brennraum des Zylinders eingespritzt wird, und einen elektrisch betätigten Aktor 16 auf. Durch den Aktor 16 wird die Öffnungs- und Schließbewegung eines Einspritzventilglieds 15 des Kraftstoffeinspritzventils 14 gesteuert. Der Aktor 16 ist vorzugsweise ein piezoelektrischer Aktor, der abhängig von einer an diesen angelegten elektrischen Spannung seine Größe ändert. Durch diese Größenänderung kann eine Schaltfunktion erzielt werden, mittels der das Einspritzventilglied 15 geöffnet bzw. geschlossen werden kann. Der Aktor 16 wird von einer elektronischen Steuereinrichtung 18 angesteuert. Der Aktor 16 ist in einem kraftstoffgefüllten Raum 20 in einem Gehäuse 22 des Injektors 12 angeordnet. Der Aktor 16 kann beispielsweise auf einen Kolben 17 wirken, durch den ein Steuerraum 19 begrenzt wird, wobei das Einspritzventilglied 15 durch den im Steuerraum 19 herrschenden Druck in Schließrichtung beaufschlagt ist. Der Kolben 17 wird durch eine vorgespannte Feder 21 in Anlage am Aktor 16 gehalten. Das Einspritzventilglied 15 wird außerdem durch eine vorgespannte Feder 23 in Schließrichtung beaufschlagt. Wenn an den Aktor 16 durch die Steuereinrichtung 18 eine elektrische Spannung angelegt ist, so dehnt sich dieser aus und drückt den Kolben 17 in den Steuerraum 19, in dem somit ein hoher Druck herrscht, durch den das Einspritzventilglied 15 in seiner Schließstellung gehalten wird, so dass keine Kraftstoffeinspritzung erfolgt. Wenn durch die Steuereinrichtung 18 keine elektrische Spannung an den Aktor 16 angelegt wird, so verringert dieser seine Ausdehnung, so dass der Kolben 17 durch die Feder 21 aus dem Steuerraum 19 herausbewegt wird, wodurch der Druck im Steuerraum 19 sinkt. Das Einspritzventilglied 15 wird dann durch den auf dieses in Öffnungsrichtung wirkenden Hochdruck gegen den im Steuerraum 19 herrschenden geringen Druck und gegen die Kraft der Feder 23 in seine Öffnungsstellung bewegt, so dass Kraftstoff eingespritzt wird.Combustion chamber of the cylinder can be injected. In the FIGS. 1 to 10 show only some of the injectors 12, with further injectors being indicated by dots up to the last injector 12d. As shown in FIG. 2, the injector 12 has a fuel injection valve 14, through which fuel is injected into the combustion chamber of the cylinder, and an electrically actuated actuator 16. By the actuator 16, the opening and closing movement of an injection valve member 15 of the fuel injection valve 14 is controlled. The actuator 16 is preferably a piezoelectric actuator that changes its size depending on an electrical voltage applied thereto. By this size change, a switching function can be achieved by means of which the injection valve member 15 can be opened or closed. The actuator 16 is driven by an electronic control device 18. The actuator 16 is arranged in a fuel-filled space 20 in a housing 22 of the injector 12. The actuator 16 can act, for example, on a piston 17, by which a control chamber 19 is limited, wherein the injection valve member 15 is acted upon by the pressure prevailing in the control chamber 19 in the closing direction. The piston 17 is held by a prestressed spring 21 in contact with the actuator 16. The injection valve member 15 is also acted upon by a prestressed spring 23 in the closing direction. When an electrical voltage is applied to the actuator 16 by the control device 18, it expands and pushes the piston 17 into the control chamber 19, in which there is thus a high pressure, by which the injection valve member 15 is held in its closed position that no fuel injection takes place. If no voltage is applied to the actuator 16 by the control device 18, this reduces its expansion, so that the piston 17 is moved out of the control chamber 19 by the spring 21, whereby the pressure in the control chamber 19 decreases. The injection valve member 15 then becomes moved by acting on this in the opening direction high pressure against the prevailing in the control chamber 19 low pressure and against the force of the spring 23 in its open position, so that fuel is injected.
Am Gehäuse 22 des Injektors 12 sind zweiOn the housing 22 of the injector 12 are two
Hochdruckanschlüsse 24 vorgesehen, über die unter Hochdruck stehender Kraftstoff dem Injektor 12 zugeführt wird bzw. von diesem weitergeführt wird. Die Hochdruckanschlüsse 24 sind mit dem Raum 20 verbunden, in dem der Aktor 16 angeordnet ist. Außerdem sind die Hochdruckanschlüsse 24 über den Raum 20 mit dem Kraftstoffeinspritzventil 14 verbunden, um diesem den für die Kraftstoffeinspritzung erforderlichen Kraftstoff zuzuführen. Der Raum 20 bildet dabei einen Hochdruckspeicher, aus dem der Kraftstoff zur Einspritzung entnommen wird. Der Raum 20 besitzt dabei ein ausreichend großes Volumen, um das für die Kraftstoffeinspritzung erforderliche Kraftstoffvolumen speichern zu können. Das Volumen des Raums 20 kann zwischen 1 und 5 cm3, beispielsweise etwa 2 cm3 betragen.High-pressure connections 24 are provided, via which high-pressure fuel is supplied to the injector 12 and is continued therefrom. The high-pressure ports 24 are connected to the space 20 in which the actuator 16 is arranged. In addition, the high-pressure ports 24 are connected to the fuel injection valve 14 through the space 20 to supply fuel necessary for fuel injection. The space 20 forms a high-pressure accumulator, from which the fuel is taken for injection. In this case, the space 20 has a sufficiently large volume in order to be able to store the fuel volume required for the fuel injection. The volume of the space 20 may be between 1 and 5 cm 3 , for example about 2 cm 3 .
Bei einem in Figur 1 dargestellten ersten Ausführungsbeispiel der Kraftstoffeinspritzeinrichtung ist nur ein erster Injektor 12a der Injektoren 12 mit der Hochdruckpumpe 10 verbunden, wobei eine vom Hochdruckauslass der Hochdruckpumpe 10 abführende hydraulische Leitung 26 mit einem Hochdruckanschluss 24 des Injektors 12a verbunden ist. Vorzugsweise ist der mit der Hochdruckpumpe 10 verbundene erste Injektor 12a der am nächsten zur Hochdruckpumpe 10 angeordnete Injektor der Brennkraftmaschine. Die Zylinder der Brennkraftmaschine und damit auch die diesen zugeordneten Injektoren 12 sind in Reihe angeordnet. Mit dem anderen Hochdruckanschluss 24 des ersten Injektors 12a ist eine hydraulische Leitung 27 verbunden, die zu einem anderen Injektor 12b führt und mit einem Hochdruckanschluss 24 dieses Injektors 12b verbunden ist. Vorzugsweise ist der Injektor 12b benachbart zum ersten Injektor 12a angeordnet. Mit dem anderen Hochdruckanschluss 24 des Injektors 12b ist eine hydraulische Leitung 27 verbunden, die wiederum zu einem anderen, vorzugsweise benachbart angeordneten Injektor 12 führt und mit einem Hochdruckanschluss 24 dieses Injektors 12 verbunden ist. Der letzte Injektor 12d ist nur über eine an einem von dessen beiden Hochdruckanschlüssen 24 angeschlossene hydraulische Leitung 27 mit dem vorhergehenden benachbarten Injektor verbunden, während an dessen anderem Hochdruckanschluss 24 ein Drucksensor 28 angeordnet ist. Alternativ kann der Drucksensor 28 auch an einem anderen Injektor 12, in einer der hydraulischen Leitungen 27 zwischen den Injektoren 12, in der hydraulischen Leitung 26 zwischen der Hochdruckpumpe 10 und dem ersten Injektor 12a oder an der Hochdruckpumpe 10 angeordnet sein. Die Injektoren 12 der Zylinder der Brennkraftmaschine sind hydraulisch in Reihe miteinander verbunden, wobei nur der erste Injektor 12a direkt mit der Hochdruckpumpe 10 verbunden ist.In a first exemplary embodiment of the fuel injection device shown in FIG. 1, only a first injector 12a of the injectors 12 is connected to the high-pressure pump 10, wherein a hydraulic line 26 leading away from the high-pressure outlet of the high-pressure pump 10 is connected to a high-pressure port 24 of the injector 12a. Preferably, the first injector 12a connected to the high-pressure pump 10 is the injector of the internal combustion engine that is closest to the high-pressure pump 10. The cylinders of the internal combustion engine and thus also the associated injectors 12 are arranged in series. With the other high pressure port 24 of the first injector 12 a, a hydraulic line 27 is connected, which leads to another injector 12 b and with a high pressure port 24 of this injector 12b is connected. Preferably, the injector 12b is disposed adjacent to the first injector 12a. Connected to the other high-pressure connection 24 of the injector 12b is a hydraulic line 27, which in turn leads to another, preferably adjacently disposed, injector 12 and is connected to a high-pressure connection 24 of this injector 12. The last injector 12d is connected to the preceding adjacent injector only via a hydraulic line 27 connected to one of its two high-pressure ports 24, while a pressure sensor 28 is arranged at the other high-pressure port 24 thereof. Alternatively, the pressure sensor 28 can also be arranged on another injector 12, in one of the hydraulic lines 27 between the injectors 12, in the hydraulic line 26 between the high-pressure pump 10 and the first injector 12a or on the high-pressure pump 10. The injectors 12 of the cylinders of the internal combustion engine are hydraulically connected in series, with only the first injector 12a is connected directly to the high-pressure pump 10.
Der Drucksensor 28 ist mit der elektrischen Steuereinrichtung 18 verbunden und liefert dieser ein Signal für den tatsächlich in den Injektoren 12 herrschenden Druck. Auf der Saugseite der Hochdruckpumpe 10 ist eine KraftstoffZumesseinrichtung 30 angeordnet, durch die die von der Hochdruckpumpe 10 angesaugte und unter Hochdruck geförderte Kraftstoffmenge verändert werden kann. Durch die KraftstoffZumesseinrichtung 30 kann beispielsweise ein veränderlicher Durchflussquerschnitt auf der Saugseite der Hochdruckpumpe 10 eingestellt werden. Vorzugsweise wird der Saugseite der Hochdruckpumpe 10 Kraftstoff aus einem Vorratsbehälter 32 mittels einer Förderpumpe 34 zugeführt, wobei dieThe pressure sensor 28 is connected to the electrical control device 18 and provides it with a signal for the pressure actually prevailing in the injectors 12. On the suction side of the high pressure pump 10, a fuel metering device 30 is arranged, through which the sucked by the high pressure pump 10 and funded under high pressure fuel quantity can be changed. For example, a variable flow cross-section on the suction side of the high-pressure pump 10 can be set by the fuel metering device 30. Preferably, the suction side of the high pressure pump 10 fuel from a reservoir 32 is supplied by means of a feed pump 34, wherein the
KraftstoffZumesseinrichtung 30 zwischen der Förderpumpe 34 und der Hochdruckpumpe 10 angeordnet ist. Durch die Steuereinrichtung 18 wird die KraftstoffZumesseinrichtung 30 derart angesteuert, dass die Hochdruckpumpe 10 eine Kraftstoffmenge unter Hochdruck zu den Injektoren 12 fördert, wie sie erforderlich ist, um in den Injektoren 12 einen vorgegebenen Druck für die Kraftstoffeinspritzung aufrechtzuerhalten .Fuel metering device 30 between the feed pump 34th and the high-pressure pump 10 is arranged. By the control device 18, the fuel metering device 30 is controlled such that the high-pressure pump 10 delivers an amount of fuel under high pressure to the injectors 12, as required to maintain a predetermined pressure in the injectors 12 for the fuel injection.
Es kann vorgesehen sein, dass die Hochdruckpumpe 10 nur ein einziges Pumpenelement aufweist, wobei die zum erstenIt can be provided that the high-pressure pump 10 has only a single pump element, wherein the first
Injektor 12a führende hydraulische Leitung 26 am Auslass dieses Pumpenelements angeschlossen ist. Alternativ kann auch vorgesehen sein, dass die Hochdruckpumpe 10 mehrere Pumpenelemente aufweist, beispielsweise zwei oder drei Pumpenelemente, wobei die Auslässe der Pumpenelemente zu einem gemeinsamen Anschluss an der Hochdruckpumpe 10 zusammengeführt sind, an dem die zum ersten Injektor 12a führende hydraulische Leitung 26 angeschlossen ist.Injector 12a leading hydraulic line 26 is connected to the outlet of this pump element. Alternatively, it can also be provided that the high-pressure pump 10 has a plurality of pump elements, for example two or three pump elements, wherein the outlets of the pump elements are brought together to form a common connection to the high-pressure pump 10, to which the hydraulic line 26 leading to the first injector 12a is connected.
In Figur 3 ist die Kraftstoffeinspritzeinrichtung gemäß einem zweiten Ausführungsbeispiel dargestellt, bei dem der grundsätzliche Aufbau gleich ist wie beim ersten Ausführungsbeispiel. Abweichend zum ersten Ausführungsbeispiel ist hier jedoch auch der letzte Injektor 12d über eine hydraulische Leitung 26 direkt mit der Hochdruckpumpe 10 verbunden. Der letzte Injektor 12d ist außerdem wie beim ersten Ausführungsbeispiel mit dem diesem benachbarten Injektor über eine hydraulische Leitung 27 verbunden. An der Hochdruckpumpe 10 sind hierbei zwei Hochdruckauslässe vorgesehen, von denen einer mit dem ersten Injektor 12a und der andere mit dem letzten Injektor 12d verbunden ist. Der Drucksensor 28 kann an einem der Injektoren 12, in einer hydraulischen Leitung 27 zwischen den Injektoren 12 oder in einer hydraulischen Leitung 26 zwischen der Hochdruckpumpe 10 und einem der Injektoren 12 oder an der Hochdruckpumpe 10 angeordnet sein. Wenn die Hochdruckpumpe 10 nur ein Pumpenelement aufweist, so müssen an diesem zwei Hochdruckanschlüsse vorgesehen sein zum Anschließen der beiden zu den Injektoren 12a und 12d führenden hydraulischen Leitungen 26. Wenn die Hochdruckpumpe 10 zwei Pumpenelemente aufweist, so ist die hydraulische Leitung 26 zum ersten Injektor 12a am Auslass des einen Pumpenelements angeschlossen und die hydraulische Leitung 26 zum letzten Injektor 12d ist am Auslass des anderen Pumpenelements angeschlossen. Wenn die Hochdruckpumpe 10 mehr als zwei Pumpenelemente aufweist, so sind deren Auslässe zu zwei Hochdruckanschlüssen an der Hochdruckpumpe 10 zusammengeführt, wobei an jedem Hochdruckanschluss eine zu einem Injektor 12a bzw. 12d führende hydraulische Leitung 26 angeschlossen ist.In Figure 3, the fuel injection device is shown according to a second embodiment, in which the basic structure is the same as in the first embodiment. Deviating from the first exemplary embodiment, however, the last injector 12d is also connected directly to the high-pressure pump 10 via a hydraulic line 26 here. The last injector 12d is also connected to the adjacent injector via a hydraulic line 27 as in the first embodiment. Two high-pressure outlets are provided on the high-pressure pump 10, one of which is connected to the first injector 12a and the other to the last injector 12d. The pressure sensor 28 may be disposed on one of the injectors 12, in a hydraulic line 27 between the injectors 12 or in a hydraulic line 26 between the high pressure pump 10 and one of the injectors 12 or on the high pressure pump 10. If the High-pressure pump 10 having only one pump element, it must be provided at this two high-pressure connections for connecting the two leading to the injectors 12a and 12d hydraulic lines 26. If the high pressure pump 10 has two pump elements, the hydraulic line 26 to the first injector 12a at the outlet the one pump element is connected and the hydraulic line 26 to the last injector 12d is connected to the outlet of the other pump element. When the high-pressure pump 10 has more than two pump elements, their outlets are combined to form two high-pressure ports on the high-pressure pump 10, with a hydraulic line 26 leading to an injector 12a or 12d being connected to each high-pressure port.
In Figur 4 ist die Kraftstoffeinspritzeinrichtung gemäß einem dritten Ausführungsbeispiel dargestellt, bei dem die Zylinder der Brennkraftmaschine v-förmig angeordnet sind, wobei in jeder Zylinderreihe mehrere Zylinder nebeneinander angeordnet sind. Nur der erste Injektor 12a einer ersten Zylinderreihe ist direkt mit der Hochdruckpumpe 10 verbunden und die übrigen Injektoren 12 sind über hydraulische Leitungen 27 in Reihe miteinander verbunden. Die jeweils am weitesten von der Hochdruckpumpe 10 entfernt angeordneten Injektoren 12 der beiden Zylinderreihen sind ebenfalls über eine hydraulische Leitung 27 miteinander verbunden. An dem am nächsten zur Hochdruckpumpe 10 angeordneten Injektor 12d der zweiten Zylinderreihe ist der Drucksensor 28 angeordnet. Der Drucksensor 28 kann auch an einer anderen Stelle angeordnet sein, wie dies beim ersten Ausführungsbeispiel angegeben ist. Die Ausbildung der Hochdruckpumpe 10 ist wie beim ersten Ausführungsbeispiel beschrieben .In Figure 4, the fuel injection device according to a third embodiment is shown, in which the cylinders of the internal combustion engine are arranged in a V-shape, wherein in each row of cylinders a plurality of cylinders are arranged side by side. Only the first injector 12a of a first cylinder bank is directly connected to the high-pressure pump 10, and the remaining injectors 12 are connected in series via hydraulic conduits 27. The farthest from the high pressure pump 10 arranged injectors 12 of the two rows of cylinders are also connected to each other via a hydraulic line 27. At the next to the high-pressure pump 10 arranged injector 12d of the second row of cylinders, the pressure sensor 28 is arranged. The pressure sensor 28 can also be arranged at a different location, as indicated in the first embodiment. The construction of the high pressure pump 10 is as described in the first embodiment.
In Figur 5 ist die Kraftstoffeinspritzeinrichtung gemäß einem vierten Ausführungsbeispiel dargestellt, das sich vom dritten Ausführungsbeispiel nur dadurch unterscheidet, dass jeweils der der Hochdruckpumpe 10 am nächsten angeordnete Injektor 12 jeder Zylinderreihe über jeweils eine hydraulische Leitung 26 mit der Hochdruckpumpe 10 verbunden ist. Die übrigen Injektoren 12 sind jeweils durch die hydraulischen Leitungen 27 untereinander in Reihe verbunden. Die Ausbildung der Hochdruckpumpe 10 ist wie beim zweiten Ausführungsbeispiel beschrieben.In Figure 5, the fuel injection device according to a fourth embodiment is shown, which differs from The third embodiment differs only in that each of the high pressure pump 10 is arranged next injector 12 of each cylinder row via a respective hydraulic line 26 to the high pressure pump 10. The remaining injectors 12 are each connected in series by the hydraulic lines 27. The construction of the high pressure pump 10 is as described in the second embodiment.
In Figur 6 ist die Kraftstoffeinspritzeinrichtung gemäß einem fünften Ausführungsbeispiel dargestellt, bei dem der grundsätzliche Aufbau gleich ist wie beim ersten Ausführungsbeispiel. Zusätzlich ist bei der Kraftstoffeinspritzeinrichtung gemäß dem fünften Ausführungsbeispiel ein Druckregelventil 32 vorgesehen, durch das der in den Injektoren 12 herrschende Druck verändert werden kann. Das Druckregelventil 32 kann beispielsweise an der Hochdruckpumpe 10 angeordnet sein. Der Drucksensor 28 kann am letzten Injektor 12d angeordnet sein. Alternativ kann das Druckregelventil 32 auch wie bei einer in Figur 7 dargestellten Variante am letzten Injektor 12d angeordnet sein und der Drucksensor 28 kann in einer der hydraulischen Leitungen 27 zwischen den Injektoren 12 angeordnet sein. Das Druckregelventil 32 und der Drucksensor 28 können auch an einer beliebigen anderenFIG. 6 shows the fuel injection device according to a fifth exemplary embodiment, in which the basic structure is the same as in the first exemplary embodiment. In addition, in the fuel injection device according to the fifth embodiment, a pressure regulating valve 32 is provided, by which the pressure prevailing in the injectors 12 pressure can be changed. The pressure control valve 32 may be arranged, for example, on the high-pressure pump 10. The pressure sensor 28 may be disposed on the last injector 12d. Alternatively, the pressure regulating valve 32 may also be arranged on the last injector 12d, as in a variant shown in FIG. 7, and the pressure sensor 28 may be arranged in one of the hydraulic lines 27 between the injectors 12. The pressure control valve 32 and the pressure sensor 28 may also be at any other
Stelle angeordnet sein. Das Druckregelventil 32 ist mit der Steuereinrichtung 18 verbunden und wird durch diese angesteuert, um den in den Injektoren 12 herrschenden Druck auf einen vorgegebenen Wert einzustellen. Bei Ansteuerung des Druckregelventils 32 durch die Steuereinrichtung 18 kann eine sehr schnelle Änderung des in den Injektoren 12 herrschenden Drucks erreicht werden. Bei Ansteuerung der KraftstoffZumesseinrichtung 30 durch die Steuereinrichtung 18 kann erreicht werden, dass die Hochdruckpumpe 10 zumindest im wesentlichen nur die für dieBe arranged place. The pressure control valve 32 is connected to the control device 18 and is controlled by the latter in order to set the pressure prevailing in the injectors 12 to a predetermined value. When the pressure control valve 32 is actuated by the control device 18, a very rapid change in the pressure prevailing in the injectors 12 can be achieved. When controlling the KraftstoffZumesseinrichtung 30 by the controller 18 can be achieved that the high-pressure pump 10 at least substantially only for the
Kraftstoffeinspritzung erforderliche Kraftstoffmenge unter Hochdruck zu den Injektoren 12 gefördert wird, wodurch die Antriebsleistung für die Hochdruckpumpe 10 gering gehalten werden kann.Fuel injection required amount of fuel below High pressure is delivered to the injectors 12, whereby the drive power for the high-pressure pump 10 can be kept low.
In Figur 8 ist die Kraftstoffeinspritzeinrichtung gemäß einem sechsten Ausführungsbeispiel dargestellt, das im wesentlichen gleich wie das dritte Ausführungsbeispiel mit v-förmig angeordneten Zylindern der Brennkraftmaschine ausgebildet ist und bei dem zusätzlich das Druckregelventil 32 vorgesehen ist. Die Verbindung der Injektoren 12 mit der Hochdruckpumpe 10 über die hydraulische Leitung 26 und untereinander über die hydraulischen Leitungen 27 ist gleich wie beim dritten Ausführungsbeispiel, so dass nur der erste Injektor 12a direkt mit der Hochdruckpumpe 10 verbunden ist. Das Druckregelventil 32 ist beispielsweise an der Hochdruckpumpe 10 angeordnet und der Drucksensor 28 ist am letzten Injektor 12d angeordnet. Alternativ kann das Druckregelventil 32 auch wie bei einer in Figur 9 dargestellten Variante am letzten Injektor 12d angeordnet sein und der Drucksensor 28 kann in einer der hydraulischen Leitungen 27 zwischen den Injektoren 12 angeordnet sein. Das Druckregelventil 32 und der Drucksensor 28 können auch an einer beliebigen anderen Stelle angeordnet sein.In Figure 8, the fuel injection device according to a sixth embodiment is shown, which is formed substantially the same as the third embodiment with V-shaped arranged cylinders of the internal combustion engine and in which additionally the pressure control valve 32 is provided. The connection of the injectors 12 with the high-pressure pump 10 via the hydraulic line 26 and with each other via the hydraulic lines 27 is the same as in the third embodiment, so that only the first injector 12 a is directly connected to the high-pressure pump 10. The pressure regulating valve 32 is arranged, for example, on the high-pressure pump 10, and the pressure sensor 28 is arranged on the last injector 12d. Alternatively, the pressure regulating valve 32 can also be arranged on the last injector 12d as in a variant shown in FIG. 9, and the pressure sensor 28 can be arranged in one of the hydraulic lines 27 between the injectors 12. The pressure control valve 32 and the pressure sensor 28 may also be arranged at any other location.
In Figur 10 ist die Kraftstoffeinspritzeinrichtung gemäß einem siebten Ausführungsbeispiel dargestellt, bei dem abweichend zum sechsten Ausführungsbeispiel jeweils der am nächsten zur Hochdruckpumpe 10 angeordnete Injektor 12 der beiden Zylinderreihen über jeweils eine hydraulische Leitung 26 mit der Hochdruckpumpe 10 verbunden ist. Die am weistesten entfernt von der Hochdruckpumpe 10 angeordneten Injektoren 12d der beiden Zylinderreihen sind nicht miteinander verbunden, sondern an diesen ist jeweils ein Druckregelventil 32 angeordnet. In einer der hydraulischen Leitungen 27 zwischen den Injektoren 12 der beidenFIG. 10 shows the fuel injection device according to a seventh exemplary embodiment, in which, unlike the sixth exemplary embodiment, in each case the injector 12 of the two cylinder rows arranged closest to the high-pressure pump 10 is connected to the high-pressure pump 10 via a respective hydraulic line 26. The most distant from the high pressure pump 10 arranged injectors 12d of the two rows of cylinders are not connected to each other, but to each of which a pressure control valve 32 is arranged. In one of the hydraulic lines 27 between the injectors 12 of the two
Zylinderreihen ist jeweils ein Drucksensor 28 angeordnet. Das Druckregelventil 32 und der Drucksensor 28 der beiden Zylinderreihen können auch an einer beliebigen anderen Stelle angeordnet sein. Beim siebten Ausführungsbeispiel sind somit getrennte Hochdruckzweige für die Injektoren 12 der beiden Zylinderreihen der Brennkraftmaschine mit eigenem Druckregelventil 32 und Drucksensor 28 vorhanden. Cylinder rows each have a pressure sensor 28 is arranged. The pressure control valve 32 and the pressure sensor 28 of the two rows of cylinders can also be arranged at any other point. In the seventh embodiment thus separate high-pressure branches for the injectors 12 of the two rows of cylinders of the internal combustion engine with its own pressure control valve 32 and pressure sensor 28 are present.

Claims

Ansprüche claims
1. Kraftstoffeinspritzeinrichtung für eine mehrzylindrige Brennkraftmaschine mit einer Hochdruckpumpe (10) und mit jeweils einem Injektor (12) für jeden Zylinder der Brennkraftmaschine, der zumindest mittelbar über eine hydraulische Leitung (26; 27) mit der Hochdruckpumpe (10) verbunden ist, dadurch gekennzeichnet, dass jeder Injektor (12) über eine hydraulische Leitung (26; 27) mit der Hochdruckpumpe (10) und/oder mit dem Injektor (12) eines anderen Zylinders der Brennkraftmaschine verbunden ist.1. Fuel injection device for a multi-cylinder internal combustion engine with a high-pressure pump (10) and each having an injector (12) for each cylinder of the internal combustion engine, which is at least indirectly connected via a hydraulic line (26, 27) to the high-pressure pump (10), characterized in that each injector (12) is connected via a hydraulic line (26; 27) to the high-pressure pump (10) and / or to the injector (12) of another cylinder of the internal combustion engine.
2. Kraftstoffeinspritzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jeder Injektor (12) wenigstens einen Speicherraum (20) aufweist, der mit den hydraulischen Leitungen (26; 27) verbunden ist.2. Fuel injection device according to claim 1, characterized in that each injector (12) has at least one storage space (20) which is connected to the hydraulic lines (26; 27).
3. Kraftstoffeinspritzeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass jeder Injektor (12) zwei Hochdruckanschlüsse (24) für die hydraulischen Leitungen (26;27) aufweist.3. Fuel injection device according to claim 1 or 2, characterized in that each injector (12) has two high pressure ports (24) for the hydraulic lines (26, 27).
4. Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Injektoren (12) über die hydraulischen Leitungen (26; 27) in Reihe miteinander verbunden sind und dass nur ein erster der Injektoren (12a) direkt mit der Hochdruckpumpe (10) verbunden ist. 4. Fuel injection device according to one of claims 1 to 3, characterized in that the injectors (12) via the hydraulic lines (26; 27) are connected in series and that only a first of the injectors (12a) directly with the high-pressure pump (10 ) connected is.
5. Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Injektoren (12) über die hydraulischen Leitungen (26; 27) in Reihe miteinander verbunden sind und dass ein erster und ein letzter der Injektoren (12a, 12d) direkt mit der Hochdruckpumpe (10) verbunden ist.5. Fuel injection device according to one of claims 1 to 3, characterized in that the injectors (12) via the hydraulic lines (26; 27) are connected in series and that a first and a last of the injectors (12a, 12d) directly with the high-pressure pump (10) is connected.
6. Kraftstoffeinspritzeinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass an der Hochdruckpumpe (10) , an einem der Injektoren (12) , in einer hydraulischen Leitung (27) zwischen den Injektoren (12) oder in einer hydraulischen Leitung (26) zwischen der Hochdruckpumpe (10) und einem der Injektoren (12) wenigstens ein Drucksensor (28) angeordnet ist.6. Fuel injection device according to one of the preceding claims, characterized in that on the high pressure pump (10), on one of the injectors (12), in a hydraulic line (27) between the injectors (12) or in a hydraulic line (26) between the high-pressure pump (10) and one of the injectors (12) at least one pressure sensor (28) is arranged.
7. Kraftstoffeinspritzeinrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der wenigstens eine Drucksensor (28) mit einer elektrischen Steuereinrichtung (18) verbunden ist und dass der Hochdruckpumpe (10) eine KraftstoffZumesseinrichtung (30) vorgeschaltet ist, die durch die Steuereinrichtung (18) in Abhängigkeit von dem durch den Drucksensor (28) erfassten Druck angesteuert wird.7. Fuel injection device according to claim 6, characterized in that the at least one pressure sensor (28) with an electrical control device (18) is connected and that the high-pressure pump (10) is preceded by a fuel metering device (30) by the control device (18) in Dependence on the pressure detected by the pressure sensor (28) is controlled.
8. Kraftstoffeinspritzeinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass an der Hochdruckpumpe (10) , an einem der Injektoren (12) , in einer hydraulischen Leitung (27) zwischen den Injektoren (12) oder in einer hydraulischen Leitung (26) zwischen der Hochdruckpumpe (10) und einem der Injektoren (12) wenigstens ein Druckregelventil (32) angeordnet ist, das durch eine elektrische Steuereinrichtung (18) angesteuert wird.8. Fuel injection device according to one of the preceding claims, characterized in that on the high pressure pump (10), on one of the injectors (12), in a hydraulic line (27) between the injectors (12) or in a hydraulic line (26) between the high-pressure pump (10) and one of the injectors (12) at least one pressure regulating valve (32) is arranged, which is controlled by an electrical control device (18).
9. Kraftstoffeinspritzeinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Hochdruckpumpe (10) ein einziges Pumpenelement aufweist, mit dem wenigstens einer der Injektoren (12) über eine hydraulische Leitung (26) verbunden ist.9. Fuel injection device according to one of the preceding claims, characterized in that the High-pressure pump (10) has a single pump element to which at least one of the injectors (12) via a hydraulic line (26) is connected.
10. Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Hochdruckpumpe (10) mehrere Pumpenelemente aufweist, die mit einem gemeinsamen Hochdruckanschluss der Hochdruckpumpe (10) verbunden sind, mit dem einer der Injektoren (12) über eine hydraulische Leitung (26) verbunden ist.10. Fuel injection device according to one of claims 1 to 8, characterized in that the high-pressure pump (10) comprises a plurality of pump elements which are connected to a common high pressure port of the high-pressure pump (10), with which one of the injectors (12) via a hydraulic line ( 26) is connected.
11. Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Hochdruckpumpe (10) zwei Pumpenelemente aufweist, mit denen jeweils einer der Injektoren (12) über jeweils eine hydraulische Leitung (26) verbunden ist. 11. Fuel injection device according to one of claims 1 to 8, characterized in that the high-pressure pump (10) has two pump elements, with each of which one of the injectors (12) via a respective hydraulic line (26) is connected.
EP06701161A 2005-03-21 2006-01-25 Fuel injection device for a multi-cylinder internal combustion engine Not-in-force EP1864014B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005012928A DE102005012928A1 (en) 2005-03-21 2005-03-21 Fuel injection device for a multi-cylinder internal combustion engine
PCT/EP2006/050448 WO2006100142A1 (en) 2005-03-21 2006-01-25 Fuel injection device for a multi-cylinder internal combustion engine

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EP1864014A1 true EP1864014A1 (en) 2007-12-12
EP1864014B1 EP1864014B1 (en) 2009-11-11

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EP06701161A Not-in-force EP1864014B1 (en) 2005-03-21 2006-01-25 Fuel injection device for a multi-cylinder internal combustion engine

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US (1) US7588016B2 (en)
EP (1) EP1864014B1 (en)
JP (1) JP4651057B2 (en)
KR (1) KR101092767B1 (en)
CN (1) CN101163879B (en)
AT (1) ATE448402T1 (en)
DE (2) DE102005012928A1 (en)
WO (1) WO2006100142A1 (en)

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Also Published As

Publication number Publication date
DE102005012928A1 (en) 2006-09-28
US7588016B2 (en) 2009-09-15
KR101092767B1 (en) 2011-12-09
KR20070110377A (en) 2007-11-16
CN101163879A (en) 2008-04-16
US20080184962A1 (en) 2008-08-07
EP1864014B1 (en) 2009-11-11
JP4651057B2 (en) 2011-03-16
ATE448402T1 (en) 2009-11-15
WO2006100142A1 (en) 2006-09-28
CN101163879B (en) 2011-03-23
DE502006005338D1 (en) 2009-12-24
JP2008533387A (en) 2008-08-21

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