EP1450034A1 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP1450034A1
EP1450034A1 EP03025329A EP03025329A EP1450034A1 EP 1450034 A1 EP1450034 A1 EP 1450034A1 EP 03025329 A EP03025329 A EP 03025329A EP 03025329 A EP03025329 A EP 03025329A EP 1450034 A1 EP1450034 A1 EP 1450034A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve according
coupler
membrane
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
EP03025329A
Other languages
German (de)
French (fr)
Other versions
EP1450034B1 (en
Inventor
Martin Maier
Guenther Hohl
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 EP1450034A1 publication Critical patent/EP1450034A1/en
Application granted granted Critical
Publication of EP1450034B1 publication Critical patent/EP1450034B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9084—Rheological fluids
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • EP 1 046 809 A2 discloses a Fluid metering known, which is a substantially Housing, located therein under fluid pressure Chamber and a guided through the chamber Valve needle, wherein a first end of the valve needle outside the chamber with a hub can be acted upon and the second end with a positioned on the housing Valve seat associated with the chamber valve forms.
  • a lead-through element for the valve needle whose first end is a metal bellows used, the hermetically sealed and only slight axial pressure related Forces generated.
  • a disadvantage of the known from EP 1 046 809 A2 Fluid metering device is in particular that these exclusively for constant, very high fluid pressures is designed. At a pressure drop during operation the fluid metering device, in particular, when the Device for metering fuel in one Internal combustion engine is used, the evaporated Hydraulic medium, which leads to malfunction of the coupler.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the hydraulic coupler also remains functional at low fuel pressures, which through the use of a special hydraulic fluid, such.
  • a special hydraulic fluid such as silicone oil, as well as a suitable design of the coupler with a different position engaging membrane is possible.
  • the membrane between two positions be folded back and forth to such a maximum or minimal volume of the compensation chamber depending on Establish operating state of the fuel injection valve can.
  • coupler space optionally can be filled with a rheological fluid.
  • Fig. 1 shows in a highly schematic view a section through a first embodiment of a Inventively designed fuel injection valve. 1
  • the fuel injection valve 1 is in particular for direct injection of fuel into the combustion chamber of a mixture-compacting, spark-ignited internal combustion engine suitable.
  • the fuel injection valve 1 comprises a piezoelectric or magnetostrictive actuator 2, which in encapsulated by a sleeve 3 and by a biasing spring 4th is biased.
  • An actuator cartridge 5 contains beside the actuator 2 and the biasing spring 4 on the inflow side of the actuator 2 a Coupler element 6 and downstream an actuator 7th
  • the Aktorpatrone 5 is opposed by a corrugated pipe 8 sealed by a fuel flowing through the interior 9.
  • the coupler element 6 comprises a coupler space 10, which for example, filled with silicone oil.
  • the coupler space 10 is also sealed via a corrugated tube seal 11.
  • the Corrugated pipe is radially stiff. It can therefore be filled axially Supporting forces.
  • a Coupler spring 12 is arranged, which ensures that a Coupler foot 13 is always held on the actuator 2 in Appendix.
  • a coupler head 14 is supported on a shoulder 15 on the Aktorpatrone 5 ab.
  • a pin 17 is arranged, which positively with the actuator base 13 is connected and in the recess 16 is guided.
  • annular gap 18 is formed, which the Transition of hydraulic fluid in a compensation chamber 19th allowed. This causes slow volume changes of thermal processes in the coupler 6 possible.
  • the compensation chamber 19 is through a membrane 20th completed.
  • the membrane 20 is in a first Position shown, which is a maximum compensation space 19 defined.
  • Fig. 1B illustrates the membrane 20 in a second Position, which is a minimum compensation space 19 Are defined.
  • intermediate positions are possible.
  • the Folding the membrane 20 from the second to the first Position is due to the displacement of the hydraulic medium in the equalization volume 19 achieved while folding back in the starting position for example by a only in Fig. 1B illustrated return spring 21 are taken can.
  • the inventively designed fuel injector 1 also has an electrical line 22 to Contacting the actuator 2 and a housing 23, in which the coupler 6 and a valve group 24 is arranged are.
  • the valve group 24 comprises a support element 25, which is in operative connection with a valve needle 26.
  • an outward Opening fuel injector 1 To reset the Valve needle 26 serves a return spring 29, which between the support element 25 and the housing 23 is clamped.
  • a Seal 30 seals the fuel injector 1 against a cylinder head not shown the Internal combustion engine.
  • the coupler space 10 in the in Fig. 2 illustrated second embodiment of a Inventively designed fuel injection valve. 1 filled with a rheological fluid.
  • a rheological fluid behaves at slow, so z. B. thermal length changes such as a liquid at fast length changes of the actuator 2, ie z. B. at Excitement of it, like a solid. Accordingly, can on the use of the pin 17 of FIG. 1A and 1B be waived, since the balance of the rheological Liquid over the recess 16 both slowly enough at thermal change in length as well as sufficiently stiff at Excitement of the actor reacts.
  • the invention is not limited to those shown Embodiments limited and z. B. for others Designs of fuel injectors 1 such. B. inside opening fuel injection valves 1 suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Fuel injection valve (1) for direct injection of fuel into a combustion chamber of an internal combustion engine comprises an excitable actuator (2), a valve needle (26) actuating a valve-closing body (27) forming a sealing seat together with a valve seat surface (28), and a hydraulic coupler (6) having a hydraulic volume (10) and a compensation chamber (19). The volume of the compensation chamber is changed by a membrane (20). Preferred Features: The membrane is moved by silicone oil between a first position corresponding to a maximum compensation chamber and a second position corresponding to a minimum compensation chamber.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention is based on a fuel injection valve according to the preamble of the main claim.

Beispielsweise ist aus der EP 1 046 809 A2 eine Fluiddosiervorrichtung bekannt, welche im wesentlichen ein Gehäuse, eine darin befindliche unter Fluiddruck stehende Kammer und eine durch die Kammer hindurchgeführte Ventilnadel umfaßt, wobei ein erstes Ende der Ventilnadel außerhalb der Kammer mit einem Hub beaufschlagbar ist und deren zweites Ende mit einem am Gehäuse positionierten Ventilsitz ein mit der Kammer in Verbindung stehendes Ventil bildet. Als Durchführungselement für die Ventilnadel an deren erstem Ende wird ein Metallbalg eingesetzt, der hermetisch abdichtet und nur geringe axiale druckbedingte Kräfte erzeugt.For example, EP 1 046 809 A2 discloses a Fluid metering known, which is a substantially Housing, located therein under fluid pressure Chamber and a guided through the chamber Valve needle, wherein a first end of the valve needle outside the chamber with a hub can be acted upon and the second end with a positioned on the housing Valve seat associated with the chamber valve forms. As a lead-through element for the valve needle whose first end is a metal bellows used, the hermetically sealed and only slight axial pressure related Forces generated.

Nachteilig bei der aus der EP 1 046 809 A2 bekannten Fluiddosiervorrichtung ist insbesondere, daß diese ausschließlich für konstante, sehr hohe Fluiddrücke ausgelegt ist. Bei einem Druckabfall während des Betriebs der Fluiddosiervorrichtung, insbesondere, wenn die Vorrichtung zur Zumessung von Brennstoff in einer Brennkraftmaschine verwendet wird, verdampft das Hydraulikmedium, was zu Fehlfunktionen des Kopplers führt.A disadvantage of the known from EP 1 046 809 A2 Fluid metering device is in particular that these exclusively for constant, very high fluid pressures is designed. At a pressure drop during operation the fluid metering device, in particular, when the Device for metering fuel in one Internal combustion engine is used, the evaporated Hydraulic medium, which leads to malfunction of the coupler.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß der hydraulische Koppler auch bei niedrigen Brennstoffdrücken funktionstüchtig bleibt, was durch den Einsatz eines speziellen Hydraulikfluids, wie z. B. Silikonöl, sowie einer geeigneten Auslegung des Kopplers mit einer verschiedene Positionen einnehmenden Membran ermöglicht wird.The fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the hydraulic coupler also remains functional at low fuel pressures, which through the use of a special hydraulic fluid, such. As silicone oil, as well as a suitable design of the coupler with a different position engaging membrane is possible.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.By the measures listed in the dependent claims are advantageous developments of the main claim specified fuel injector possible.

Vorteilhafterweise kann die Membran zwischen zwei Stellungen hin- und hergeklappt werden, um so ein maximales oder minimales Volumen des Ausgleichsraums je nach Betriebszustand des Brennstoffeinspritzventils herstellen zu können.Advantageously, the membrane between two positions be folded back and forth to such a maximum or minimal volume of the compensation chamber depending on Establish operating state of the fuel injection valve can.

Weiterhin ist vorteilhaft, daß durch einen Spalt zwischen einem in einer Bohrung des Kopplerkopfes geführten Ausnehmung der Ausgleich von Hydraulikfluid in den Ausgleichsraum in einfacher Weise ermöglicht wird, ohne das Hydraulikvolumen zu stark zu entleeren.Furthermore, it is advantageous that a gap between one guided in a bore of the Kopplerkopfes Recess of the compensation of hydraulic fluid in the Compensation space is made possible in a simple manner without that Too much hydraulic volume to empty.

Von Vorteil ist außerdem, daß der Kopplerraum wahlweise auch mit einer rheologischen Flüssigkeit gefüllt sein kann.Another advantage is that the coupler space optionally can be filled with a rheological fluid.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1A
einen schematischen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils in einem ersten Betriebszustand,
Fig. 1B
einen schematischen Ausschnitt aus dem in Fig. 1 dargestellten ersten Ausführungsbeispiel des erfindungsgemäßen Brennstoffeinspritzventils im Bereich IB in einem zweiten Betriebszustand, und
Fig. 2
einen schematischen Ausschnitt aus einem zweiten Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich IB mit einem alternativen Kopplermedium.
Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1A
FIG. 2 shows a schematic section through a first exemplary embodiment of a fuel injection valve designed according to the invention in a first operating state, FIG.
Fig. 1B
a schematic section of the illustrated in Fig. 1 the first embodiment of the fuel injection valve according to the invention in the area IB in a second operating state, and
Fig. 2
a schematic section of a second embodiment of a fuel injection valve according to the invention in the area IB with an alternative coupler medium.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Nachfolgend werden Ausführungsbeispiele der Erfindung beispielhaft beschrieben. Übereinstimmende Bauteile sind dabei in allen Figuren mit übereinstimmenden Bezugszeichen versehen.Below are embodiments of the invention described by way of example. Matching components are in all figures with matching reference numerals Mistake.

Fig. 1 zeigt dabei in einer stark schematisierten Ansicht einen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1. Das Brennstoffeinspritzventil 1 ist insbesondere zum direkten Einspritzen von Brennstoff in den Brennraum einer gemischverdichtenden, fremdgezündeten Brennkraftmaschine geeignet.Fig. 1 shows in a highly schematic view a section through a first embodiment of a Inventively designed fuel injection valve. 1 The fuel injection valve 1 is in particular for direct injection of fuel into the combustion chamber of a mixture-compacting, spark-ignited internal combustion engine suitable.

Das Brennstoffeinspritzventil 1 umfaßt einen piezoelektrischen oder magnetostriktiven Aktor 2, der in einer Hülse 3 gekapselt und durch eine Vorspannfeder 4 vorgespannt ist. Eine Aktorpatrone 5 enthält neben dem Aktor 2 und der Vorspannfeder 4 zuströmseitig des Aktors 2 ein Kopplerelement 6 und abströmseitig ein Betätigungselement 7. Die Aktorpatrone 5 ist durch eine Wellrohrdichtung 8 gegen einen von Brennstoff durchflossenen Innenraum 9 abgedichtet. The fuel injection valve 1 comprises a piezoelectric or magnetostrictive actuator 2, which in encapsulated by a sleeve 3 and by a biasing spring 4th is biased. An actuator cartridge 5 contains beside the actuator 2 and the biasing spring 4 on the inflow side of the actuator 2 a Coupler element 6 and downstream an actuator 7th The Aktorpatrone 5 is opposed by a corrugated pipe 8 sealed by a fuel flowing through the interior 9.

Das Kopplerelement 6 umfaßt einen Kopplerraum 10, welcher beispielsweise mit Silikonöl befüllt ist. Der Kopplerraum 10 ist ebenfalls über eine Wellrohrdichtung 11 abgedichtet. Das Wellrohr ist radial steif. Befüllt kann es daher axiale Kräfte abstützen. Weiterhin ist im Kopplerraum eine Kopplerfeder 12 angeordnet, welche dafür sorgt, daß ein Kopplerfuß 13 stets am Aktor 2 in Anlage gehalten wird.The coupler element 6 comprises a coupler space 10, which for example, filled with silicone oil. The coupler space 10 is also sealed via a corrugated tube seal 11. The Corrugated pipe is radially stiff. It can therefore be filled axially Supporting forces. Furthermore, in the coupler room a Coupler spring 12 is arranged, which ensures that a Coupler foot 13 is always held on the actuator 2 in Appendix.

Ein Kopplerkopf 14 stützt sich an einer Schulter 15 an der Aktorpatrone 5 ab. In einer Ausnehmung 16 des Kopplerkopfes 14 ist ein Stift 17 angeordnet, welcher formschlüssig mit dem Aktorfuß 13 verbunden ist und in der Ausnehmung 16 geführt ist. Zwischen dem Stift 17 und der Wandung der Ausnehmung 16 ist ein Ringspalt 18 ausgebildet, welcher den Übergang von Hydraulikfluid in einen Ausgleichsraum 19 erlaubt. Dadurch sind langsame Volumenänderungen aufgrund von thermischen Prozessen im Koppler 6 möglich.A coupler head 14 is supported on a shoulder 15 on the Aktorpatrone 5 ab. In a recess 16 of the Kopplerkopfes 14, a pin 17 is arranged, which positively with the actuator base 13 is connected and in the recess 16 is guided. Between the pin 17 and the wall of the Recess 16 is an annular gap 18 is formed, which the Transition of hydraulic fluid in a compensation chamber 19th allowed. This causes slow volume changes of thermal processes in the coupler 6 possible.

Der Ausgleichsraum 19 ist durch eine Membran 20 abgeschlossen. In Fig. 1A ist die Membran 20 in einer ersten Stellung dargestellt, welche einen maximalen Ausgleichsraum 19 definiert. Fig. 1B stellt die Membran 20 in einer zweiten Stellung dar, welche einen minimalen Ausgleichsraum 19 definiert. Zusätzlich sind Zwischenstellungen möglich. Das Umklappen der Membran 20 aus der zweiten in die erste Stellung wird durch die Verdrängung des Hydraulikmediums in das Ausgleichsvolumen 19 erzielt, während das Zurückklappen in die Ausgangsstellung beispielsweise durch eine nur in Fig. 1B dargestellte Rückstellfeder 21 übernommen werden kann.The compensation chamber 19 is through a membrane 20th completed. In Fig. 1A, the membrane 20 is in a first Position shown, which is a maximum compensation space 19 defined. Fig. 1B illustrates the membrane 20 in a second Position, which is a minimum compensation space 19 Are defined. In addition, intermediate positions are possible. The Folding the membrane 20 from the second to the first Position is due to the displacement of the hydraulic medium in the equalization volume 19 achieved while folding back in the starting position for example by a only in Fig. 1B illustrated return spring 21 are taken can.

Durch die zwei Stellungen der Membran 20 kann sichergestellt werden, daß Temperaturänderungen des Aktors 2 ausgeglichen werden.Through the two positions of the membrane 20 can be ensured be compensated that changes in temperature of the actuator 2 become.

Das erfindungsgemäß ausgestaltete Brennstoffeinspritzventil 1 weist weiterhin eine elektrische Leitung 22 zur Kontaktierung des Aktors 2 sowie ein Gehäuse 23 auf, in welchem der Koppler 6 und eine Ventilgruppe 24 angeordnet sind. Dabei umfaßt die Ventilgruppe 24 ein Stützelement 25, welches in Wirkverbindung mit einer Ventilnadel 26 steht. An der Ventilnadel 26 ist ein Ventilschließkörper .27 ausgebildet, welcher mit einer an dem Gehäuse 23 angeordneten Ventilsitzfläche 28 einen Dichtsitz bildet. Im Ausführungsbeispiel handelt es sich um ein nach außen öffnendes Brennstoffeinspritzventil 1. Zur Rückstellung der Ventilnadel 26 dient eine Rückstellfeder 29, welche zwischen dem Stützelement 25 und dem Gehäuse 23 eingespannt ist. Eine Dichtung 30 dichtet das Brennstoffeinspritzventil 1 gegen einen nicht weiter dargestellten Zylinderkopf der Brennkraftmaschine ab.The inventively designed fuel injector 1 also has an electrical line 22 to Contacting the actuator 2 and a housing 23, in which the coupler 6 and a valve group 24 is arranged are. In this case, the valve group 24 comprises a support element 25, which is in operative connection with a valve needle 26. At the valve needle 26 is a valve closing body .27 formed, which with a on the housing 23rd arranged valve seat surface 28 forms a sealing seat. in the Embodiment is an outward Opening fuel injector 1. To reset the Valve needle 26 serves a return spring 29, which between the support element 25 and the housing 23 is clamped. A Seal 30 seals the fuel injector 1 against a cylinder head not shown the Internal combustion engine.

Zur Montage des Kopplers 6 ist es vorteilhaft, diesen zu evakuieren, um eine einfache Montage des Gesamtbauteils zu ermöglichen und den Kopplerraum 10 anschließend über eine Bohrung 31, welche z. B. abschließend mit einer eingepreßten Kugel 32 verschlossen wird, zu befüllen.For mounting the coupler 6, it is advantageous to this evacuate to allow easy assembly of the entire component allow and then the coupler space 10 via a Bore 31, which z. B. finally with a pressed Ball 32 is closed, to fill.

Während der Kopplerraum 10 in Fig. 1A und 1B mit einer beliebigen Hydraulikflüssigkeit, welche lediglich die Anforderung erfüllt, bei schneller Druckentlastung nicht zu verdampfen, gefüllt ist, ist der Kopplerraum 10 in dem in Fig. 2 dargestellten zweiten Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1 mit einer rheologischen Flüssigkeit gefüllt. Eine rheologische Flüssigkeit verhält sich bei langsamen, also z. B. thermischen Längenänderungen wie eine Flüssigkeit, bei schnellen Längenänderungen des Aktors 2, also z. B. bei Erregung desselben, wie ein Festkörper. Dementsprechend kann auf die Verwendung des Stiftes 17 gemäß Fig. 1A und 1B verzichtet werden, da der Ausgleich der rheologischen Flüssigkeit über die Ausnehmung 16 sowohl genügend langsam bei thermischer Längenänderung als auch genügend steif bei Erregung des Aktors reagiert.While the coupler space 10 in Fig. 1A and 1B with a Any hydraulic fluid, which only the Requirement fulfilled, not with fast pressure relief vaporize, is filled, the coupler space 10 in the in Fig. 2 illustrated second embodiment of a Inventively designed fuel injection valve. 1 filled with a rheological fluid. A rheological fluid behaves at slow, so z. B. thermal length changes such as a liquid at fast length changes of the actuator 2, ie z. B. at Excitement of it, like a solid. Accordingly, can on the use of the pin 17 of FIG. 1A and 1B be waived, since the balance of the rheological Liquid over the recess 16 both slowly enough at thermal change in length as well as sufficiently stiff at Excitement of the actor reacts.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und z. B. auch für andere Bauweisen von Brennstoffeinspritzventilen 1 wie z. B. innen öffnende Brennstoffeinspritzventile 1 geeignet.The invention is not limited to those shown Embodiments limited and z. B. for others Designs of fuel injectors 1 such. B. inside opening fuel injection valves 1 suitable.

Claims (15)

Brennstoffeinspritzventil (1) zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine mit einem erregbaren Aktuator (2), einer mit dem Aktuator (2) in Wirkverbindung stehenden und in einer Schließrichtung von einer Rückstellfeder (29) beaufschlagten Ventilnadel (26) zur Betätigung eines Ventilschließkörpers (27), der zusammen mit einer Ventilsitzfläche (28) einen Dichtsitz bildet, und einem hydraulischen Koppler (6),
dadurch gekennzeichnet, daß der hydraulische Koppler (6) ein Hydraulikvolumen (10) und einen Ausgleichsraum (19) umfaßt, wobei der Ausgleichsraum (19) durch eine Membran (20) in seinem Volumen veränderbar ist.Fuel injection valve (1) for direct injection of fuel into a combustion chamber of an internal combustion engine with an excitable actuator (2), a valve needle (26) operatively connected to the actuator (2) and acted upon in a closing direction by a return spring (29) Valve-closing body (27), which forms a sealing seat together with a valve seat surface (28), and a hydraulic coupler (6),
characterized in that the hydraulic coupler (6) comprises a hydraulic volume (10) and a compensation chamber (19), wherein the compensation chamber (19) by a membrane (20) is variable in its volume. Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß die Membran (20) zwischen einer ersten Stellung und einer zweiten Stellung umklappbar ist.Fuel injection valve according to claim 1,
characterized in that the membrane (20) is foldable between a first position and a second position. Brennstoffeinspritzventil nach Anspruch 2,
dadurch gekennzeichnet, daß die erste Stellung der Membran (20) einem maximalen Ausgleichsraum (19) entspricht.Fuel injection valve according to claim 2,
characterized in that the first position of the membrane (20) corresponds to a maximum compensation space (19). Brennstoffeinspritzventil nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß die zweite Stellung der Membran (20) einem minimalen Ausgleichsraum (19) entspricht.Fuel injection valve according to claim 2 or 3,
characterized in that the second position of the membrane (20) corresponds to a minimum compensation space (19). Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Membran (20) zwischen der ersten und der zweiten Stellung durch ein in der Hydraulikkammer (10) vorhandenen Hydraulikmediums umklappbar und dazwischen stufenlos verstellbar ist.Fuel injection valve according to one of claims 1 to 4,
characterized in that the membrane (20) between the first and the second position by a in the hydraulic chamber (10) existing hydraulic medium can be folded down and continuously adjustable between them. Brennstoffeinspritzventil nach Anspruch 5,
dadurch gekennzeichnet, daß als Hydraulikmedium Silikonöl vorgesehen ist.Fuel injection valve according to claim 5,
characterized in that is provided as the hydraulic medium silicone oil. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß der Koppler (6) einen Kopplerfuß (13) und einen Kopplerkopf (14) umfaßt.Fuel injection valve according to one of claims 1 to 6,
characterized in that the coupler (6) comprises a coupler foot (13) and a coupler head (14). Brennstoffeinspritzventil nach Anspruch 7,
dadurch gekennzeichnet, daß in dem Kopplerfuß (13) ein Stift (17) angeordnet ist.Fuel injection valve according to claim 7,
characterized in that in the Kopplerfuß (13) a pin (17) is arranged. Brennstoffeinspritzventil nach Anspruch 8,
dadurch gekennzeichnet, daß sich der Stift (17) in eine Ausnehmung (16) des Kopplerkopfes (14) erstreckt.Fuel injection valve according to claim 8,
characterized in that the pin (17) extends into a recess (16) of the coupler head (14). Brennstoffeinspritzventil nach Anspruch 9,
dadurch gekennzeichnet, daß der Stift (17) in der Ausnehmung (16) unter Bildung eines Ringspalts (18) geführt ist.Fuel injection valve according to claim 9,
characterized in that the pin (17) in the recess (16) is guided to form an annular gap (18). Brennstoffeinspritzventil nach einem der Ansprüche 7 bis 10,
dadurch gekennzeichnet, daß der Kopplerfuß (13) und der Kopplerkopf (14) durch eine Feder (12) voneinander beabstandet sind.Fuel injection valve according to one of claims 7 to 10,
characterized in that the Kopplerfuß (13) and the Kopplerkopf (14) by a spring (12) are spaced from each other. Brennstoffeinspritzventil nach einem der Ansprüche 7 bis 11,
dadurch gekennzeichnet, daß der Kopplerraum (10) durch eine Wellrohrdichtung (11) abgedichtet ist.Fuel injection valve according to one of claims 7 to 11,
characterized in that the coupler space (10) is sealed by a corrugated tube seal (11). Brennstoffeinspritzventil nach einem der Ansprüche 7 bis 12,
dadurch gekennzeichnet, daß in dem Kopplerfuß (13) eine Bohrung (31) zur Befüllung des Kopplerraums (10) vorgesehen ist.Fuel injection valve according to one of claims 7 to 12,
characterized in that in the Kopplerfuß (13) has a bore (31) for filling the coupler space (10) is provided. Brennstoffeinspritzventil nach Anspruch 13,
dadurch gekennzeichnet, daß die Bohrung (31) nach Befüllen des Kopplerraums (10) durch eine vorzugsweise eingepreßte Kugel (32) verschließbar ist.Fuel injection valve according to claim 13,
characterized in that the bore (31) after filling of the coupler space (10) by a preferably pressed-in ball (32) is closable. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 14,
dadurch gekennzeichnet, daß das Hydraulikvolumen (10) eine rheologische Flüssigkeit enthält.Fuel injection valve according to one of claims 1 to 14,
characterized in that the hydraulic volume (10) contains a rheological fluid.
EP03025329A 2003-02-24 2003-11-04 Fuel injector Expired - Lifetime EP1450034B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10307816 2003-02-24
DE10307816A DE10307816A1 (en) 2003-02-24 2003-02-24 Fuel injector

Publications (2)

Publication Number Publication Date
EP1450034A1 true EP1450034A1 (en) 2004-08-25
EP1450034B1 EP1450034B1 (en) 2008-04-09

Family

ID=32731122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03025329A Expired - Lifetime EP1450034B1 (en) 2003-02-24 2003-11-04 Fuel injector

Country Status (3)

Country Link
EP (1) EP1450034B1 (en)
AT (1) ATE391850T1 (en)
DE (2) DE10307816A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141347A1 (en) * 2008-07-03 2010-01-06 Continental Automotive GmbH Thermal compensation arrangement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306072A1 (en) * 1993-02-26 1994-09-08 Siemens Ag Device for opening and closing a passage opening in a housing
DE19708304A1 (en) * 1997-02-28 1998-09-10 Siemens Ag Device for transferring movement for fuel injection valve in motor vehicle engine
DE19744235A1 (en) * 1997-10-07 1999-04-08 Fev Motorentech Gmbh & Co Kg Fuel injection nozzle for IC engine
DE10044120A1 (en) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Common Rail System
US20020139864A1 (en) * 2000-10-11 2002-10-03 Jack Lorraine Dual-spring compensator assembly for a fuel injector and method
WO2003018992A1 (en) * 2001-08-20 2003-03-06 Robert Bosch Gmbh Fuel injection valve
EP1378657A2 (en) * 2002-07-04 2004-01-07 Robert Bosch Gmbh Fuel injector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919313B4 (en) * 1999-04-28 2013-12-12 Robert Bosch Gmbh Fuel injector
DE19940056A1 (en) * 1999-08-24 2001-03-22 Siemens Ag Dosing device and method for dosing
DE19940054C2 (en) * 1999-08-24 2003-11-27 Siemens Ag Dosing valve for a pressurized fluid

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306072A1 (en) * 1993-02-26 1994-09-08 Siemens Ag Device for opening and closing a passage opening in a housing
DE19708304A1 (en) * 1997-02-28 1998-09-10 Siemens Ag Device for transferring movement for fuel injection valve in motor vehicle engine
DE19744235A1 (en) * 1997-10-07 1999-04-08 Fev Motorentech Gmbh & Co Kg Fuel injection nozzle for IC engine
DE10044120A1 (en) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Common Rail System
US20020139864A1 (en) * 2000-10-11 2002-10-03 Jack Lorraine Dual-spring compensator assembly for a fuel injector and method
WO2003018992A1 (en) * 2001-08-20 2003-03-06 Robert Bosch Gmbh Fuel injection valve
EP1378657A2 (en) * 2002-07-04 2004-01-07 Robert Bosch Gmbh Fuel injector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141347A1 (en) * 2008-07-03 2010-01-06 Continental Automotive GmbH Thermal compensation arrangement

Also Published As

Publication number Publication date
DE50309573D1 (en) 2008-05-21
EP1450034B1 (en) 2008-04-09
ATE391850T1 (en) 2008-04-15
DE10307816A1 (en) 2004-09-02

Similar Documents

Publication Publication Date Title
EP1434937B1 (en) Fuel injection valve
EP1456527A1 (en) Device for the translation of a displacement of an actuator, in particular for an injection valve
EP1456526B1 (en) Fuel injection valve
DE19925102B4 (en) Fuel injector
DE10217594A1 (en) Fuel injection valve for IC engines has throttle gap formed by Laser/erosion drilling, and positioned separate from guide gaps, for cheaper fabrication of gaps
EP1378657B1 (en) Fuel injector
DE10149914A1 (en) Fuel injection valve consists of an actuator located in a housing connected on the side of a valve needle to a valve body
WO2009059864A1 (en) Piezoelectric actuator module
EP1519035B1 (en) Fuel injection valve
EP1519037B1 (en) Fuel injection valve
EP1519036B1 (en) Fuel injection valve
EP1450034A1 (en) Fuel injector
DE10360449A1 (en) Fuel injector
EP1208321B1 (en) Valve for controlling liquids
DE10159748B4 (en) Fuel injector
EP1664525B1 (en) Metering device
DE102006017927A1 (en) Fuel injection valve for external-ignited internal-combustion engine, has actuator staying in effective connection with valve body, and balancing volume formed at flow-off-side of actuator, where volume is filled with fuel
EP1442210B1 (en) Fuel injection valve
DE102006013958B4 (en) Fuel injector
DE10318639A1 (en) Fuel injector
EP1519034B1 (en) Fuel injection valve
EP1452727A1 (en) Fuel injector
DE10306591B4 (en) Fuel injector
DE19939132A1 (en) Fuel injector
DE10321693A1 (en) Fuel injection valve for fuel drive engines, where a coupling chamber of a coupler is at least partly filled with gas

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20050225

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20061018

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50309573

Country of ref document: DE

Date of ref document: 20080521

Kind code of ref document: P

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080909

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080709

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080720

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080709

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

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

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

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

26N No opposition filed

Effective date: 20090112

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

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

BERE Be: lapsed

Owner name: ROBERT BOSCH G.M.B.H.

Effective date: 20081130

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

Ref country code: MC

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

Effective date: 20081130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

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

Ref country code: BE

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

Effective date: 20081130

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

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

Ref country code: CH

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

Effective date: 20081130

Ref country code: LI

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

Effective date: 20081130

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

Ref country code: AT

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

Effective date: 20081104

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

Ref country code: LU

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

Effective date: 20081104

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081010

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080409

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080710

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

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

Ref country code: FR

Payment date: 20171124

Year of fee payment: 15

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

Ref country code: GB

Payment date: 20171124

Year of fee payment: 15

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

Ref country code: DE

Payment date: 20190124

Year of fee payment: 16

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20181104

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: 20181130

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

Ref country code: GB

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

Effective date: 20181104

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50309573

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: 20200603