EP1555429B1 - Fuel injection nozzle - Google Patents

Fuel injection nozzle Download PDF

Info

Publication number
EP1555429B1
EP1555429B1 EP05000209A EP05000209A EP1555429B1 EP 1555429 B1 EP1555429 B1 EP 1555429B1 EP 05000209 A EP05000209 A EP 05000209A EP 05000209 A EP05000209 A EP 05000209A EP 1555429 B1 EP1555429 B1 EP 1555429B1
Authority
EP
European Patent Office
Prior art keywords
pressure
nozzle needle
control piston
fuel injection
injection nozzle
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.)
Not-in-force
Application number
EP05000209A
Other languages
German (de)
French (fr)
Other versions
EP1555429A1 (en
Inventor
Stephan Haas
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.)
MAN Energy Solutions SE
Original Assignee
MAN Diesel SE
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 MAN Diesel SE filed Critical MAN Diesel SE
Publication of EP1555429A1 publication Critical patent/EP1555429A1/en
Application granted granted Critical
Publication of EP1555429B1 publication Critical patent/EP1555429B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M61/06—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 being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Definitions

  • the invention relates to a fuel injector with a housing in which a held under the action of a spring by abutment against a seat in the closed position, auf whybare by the pressure of the injected fuel nozzle needle is arranged.
  • the EP 1 041 272 A or the DE 41 23 721 , C already shows a fuel injector in which a control piston for limiting the Einspritznadelhubs is present.
  • the control piston is movable under the influence of a control valve, which controls the pressure in the control room, between two stop points fixed to the housing. Depending on this, the maximum stroke of the nozzle needle varies, so that selectively one or two rows of spray holes can be released.
  • the invention has for its object to provide a simple and compact fuel injector constructed in two different, precisely definable operating positions for full and part load and their application is not limited to a special injection system.
  • this is achieved by providing a control piston which can be acted upon or depressurized by one of two different axial positions by means of a pressurized fluid and which delimits the opening path of the nozzle needle for releasing one or more spray-hole rows.
  • the nozzle needle facing away from the end face of the control piston is pressurized in a the opening stroke of the nozzle needle to release a spray hole row limiting partial load position and relieved of pressure in another, all superimposed injection hole rows releasing full load position.
  • control piston is in the partial load position with its end facing the nozzle needle on a housing-fixed stop.
  • the control piston is in the full load position with an end facing away from the nozzle needle on a further housing-fixed stop. This results in precisely defined operating positions for the two load ranges.
  • the injector according to FIG. 1 has a housing composed of three parts 1, 2, 3.
  • a nozzle needle 4 is axially displaceably guided, which has a section 5 with an enlarged diameter.
  • the section 5 protrudes into a pressure chamber 6 into which the fuel to be injected is supplied via a line 7.
  • the lower end of the valve needle 4 is under the action of a spring 8 to a seat 9 at.
  • a control pin 10 which passes through a naval 11.
  • In the naval 11 opens a first row of spray holes 12.
  • the lower end of the control pin 10 projects sealingly into a furthertreraum 13 into which opens at least one further series of spray holes 14.
  • the upper end face 15 of the two-part nozzle needle 4 is located in the in FIG. 1 illustrated rest position at a distance h1 from the lower end face 16 of a guided in the housing part 2 in the axial direction of the control piston 17.
  • the control piston 17 is located with the edge of its lower end face 16 to an annular stop 18 fixed to the housing.
  • the control piston 17 passes through an annular chamber 19, which communicates via a line 20 with the fuel-carrying line 7 in connection. From the chamber 19, a line 21 in the control piston 17 leads to a pressure chamber 22 above the upper end face 23 of the control piston 17.
  • the pressure chamber 22 is bounded laterally by the housing part 2 and above by a plate-shaped stop 24.
  • the stop 24 has a bore 25 which can be closed by a closure member.
  • the closure member has a closure ball 26 which is durable by means of an actuating rod 27 in the closed position.
  • the control rod 27 is adjustable in dependence on the load condition of the engine such that in the rest position and in the partial load position, the closure ball 26 is held in the closed position and releases the closure ball in the full load position, so that the fuel can flow through a line 28.
  • it is also differently constructed, depending on the engine power alsutz and zumelde closure organs used.
  • FIG. 2 The arrangement according to FIG. 2 is in principle just as structured as the one after FIG. 1 , Only here is the chamber 19 connected to a line 30 which is supplied by means of a pump 31 lubricating oil under pressure. This lubricating oil then passes via the line 21 into the pressure chamber 22.
  • the other function is consistent with the arrangement according to FIG. 1 match. It is also possible to pressurize the pressure chamber 22 with a pressure fluid from a separate fluid circuit.

Landscapes

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

Description

Die Erfindung betrifft eine Kraftstoffeinspritzdüse mit einem Gehäuse, in dem eine unter der Wirkung einer Feder durch Anlage an einen Sitz in Schließstellung gehaltene, durch den Druck des eingespritzten Kraftstoffs aufsteuerbare Düsennadel angeordnet ist.The invention relates to a fuel injector with a housing in which a held under the action of a spring by abutment against a seat in the closed position, aufsteuerbare by the pressure of the injected fuel nozzle needle is arranged.

Die EP 1 041 272 A oder die DE 41 23 721 . C zeigt bereits eine Kraftstoffeinspritzdüse, bei der ein Steuerkolben zur Begrenzung des Einspritznadelhubs vorhanden ist. Der Steuerkolben ist unter dem Einsfluss eines Steuerventils, das den Druck im Steuerraum kontrolliert, zwischen zwei gehäusefesten Anschlagstellen beweglich. Abhängig davon variiert der maximale Hub der Düsennadel, so dass selektiv eine bzw. zwei Reihen von Spritzlöcher freigegeben werden können.The EP 1 041 272 A or the DE 41 23 721 , C already shows a fuel injector in which a control piston for limiting the Einspritznadelhubs is present. The control piston is movable under the influence of a control valve, which controls the pressure in the control room, between two stop points fixed to the housing. Depending on this, the maximum stroke of the nozzle needle varies, so that selectively one or two rows of spray holes can be released.

Der Erfindung liegt die Aufgabe zugrunde, eine einfach und raumsparend aufgebaute Kraftstoffeinspritzdüse zu schaffen, die in zwei verschiedene, genau definierbare Betriebsstellungen für Voll- und Teillast überführbar und deren Anwendung nicht auf ein spezielles Einspritzsystem beschränkt ist.The invention has for its object to provide a simple and compact fuel injector constructed in two different, precisely definable operating positions for full and part load and their application is not limited to a special injection system.

Erfindungsgemäß wird dies dadurch erreicht, dass ein zur Überführung in eine von zwei unterschiedlichen axialen Stellungen mittels eines Druckfluiids beaufschlagbarer oder druckentlastbarer Steuerkolben vorgesehen ist, der den Öffnungsweg der Düsennadel zur Freigabe einer oder mehrerer Spritzlochreihen begrenzt.According to the invention, this is achieved by providing a control piston which can be acted upon or depressurized by one of two different axial positions by means of a pressurized fluid and which delimits the opening path of the nozzle needle for releasing one or more spray-hole rows.

Hierdurch ergibt sich ein einfacher Aufbau, der innerhalb der Umrisse einer normalen Kraftstoffeinspritzdüse untergebracht werden kann.This results in a simple structure that can be accommodated within the outline of a normal fuel injector.

Die der Düsennadel abgewandte Stirnfläche des Steuerkolbens ist in einer den Öffnungsweg der Düsennadel zur Freigabe einer Spritzlochreihe begrenzenden Teillaststellung druckbeaufschlagt und in einer weiteren, alle übereinander angeordneten Spritzlochreihen freigebenden Volllaststellung druckentlastet.The nozzle needle facing away from the end face of the control piston is pressurized in a the opening stroke of the nozzle needle to release a spray hole row limiting partial load position and relieved of pressure in another, all superimposed injection hole rows releasing full load position.

Gemäß der Erfindung liegt der Steuerkolben in der Teillaststellung mit seiner der Düsennadel zugewandten Stirnfläche an einem gehäusefesten Anschlag an. Der Steuerkolben liegt in der Volllaststellung mit einer der Düsennadel abgewandten Stirnfläche an einem weiteren gehäusefesten Anschlag an. Hierdurch ergeben sich genau definierte Betriebsstellungen für die beiden Lastbereiche.According to the invention, the control piston is in the partial load position with its end facing the nozzle needle on a housing-fixed stop. The control piston is in the full load position with an end facing away from the nozzle needle on a further housing-fixed stop. This results in precisely defined operating positions for the two load ranges.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den zusätzlichen Unteransprüchen und einer Beschreibung zweier Ausführungsbeispiele anhand der Zeichnung. Auf dieser zeigen jeweils in einem senkrechten Schnitt:

  • Figur 1 eine Kraftstoffeinspritzdüse mit Kraftstoff als Druckfluid
  • Figur 2 eine Kraftstoffeinspritzdüse mit Schmieröl als Druckfluid.
Further features and advantages of the invention will become apparent from the additional dependent claims and a description of two embodiments with reference to the drawings. On this each show in a vertical section:
  • FIG. 1 a fuel injector with fuel as the pressurized fluid
  • FIG. 2 a fuel injector with lubricating oil as the pressurized fluid.

Die Einspritzdüse gemäß Figur 1 weist ein aus drei Teilen 1, 2, 3 zusammengesetztes Gehäuse auf. Im Gehäuse 1 ist eine Düsennadel 4 axial verschiebbar geführt, die einen Abschnitt 5 mit vergrößertem Durchmesser aufweist. Der Abschnitt 5 ragt in einen Druckraum 6 hinein, dem der einzuspritzende Kraftstoff über eine Leitung 7 zugeführt wird. Das untere Ende der Ventilnadel 4 liegt unter der Wirkung einer Feder 8 an einem Sitz 9 an. An diesem Ende der Ventilnadel 4 befindet sich ein Steuerzapfen 10, der einen Vorlageraum 11 durchsetzt. In den Vorlageraum 11 mündet eine erste Reihe von Spritzlöcher 12. Das untere Ende des Steuerzapfens 10 ragt abdichtend in einen weiteren Vorlageraum 13 hinein, in den mindestens eine weitere Reihe von Spritzlöchem 14 mündet.The injector according to FIG. 1 has a housing composed of three parts 1, 2, 3. In the housing 1, a nozzle needle 4 is axially displaceably guided, which has a section 5 with an enlarged diameter. The section 5 protrudes into a pressure chamber 6 into which the fuel to be injected is supplied via a line 7. The lower end of the valve needle 4 is under the action of a spring 8 to a seat 9 at. At this end of the valve needle 4 is a control pin 10, which passes through a Vorlageraum 11. In the Vorlageraum 11 opens a first row of spray holes 12. The lower end of the control pin 10 projects sealingly into a further Vorlageraum 13 into which opens at least one further series of spray holes 14.

Die obere Stirnfläche 15 der zweiteilig ausgeführten Düsennadel 4 befindet sich in der in Figur 1 dargestellten Ruhestellung in einem Abstand h1 von der unteren Stirnfläche 16 eines im Gehäuseteil 2 in Achsrichtung geführten Steuerkolbens 17. Dabei liegt der Steuerkolben 17 mit dem Rand seiner unteren Stirnfläche 16 an einen ringförmigen gehäusefesten Anschlag 18 an. Der Steuerkolben 17 durchsetzt eine ringförmige Kammer 19, die über eine Leitung 20 mit der den Kraftstoff führenden Leitung 7 in Verbindung steht. Von der Kammer 19 führt eine Leitung 21 im Steuerkolben 17 zu einem Druckraum 22 über der oberen Stirnfläche 23 des Steuerkolbens 17. Der Druckraum 22 ist seitlich durch den Gehäuseteil 2 und oben durch einen plattenförmigen Anschlag 24 begrenzt. Der Anschlag 24 weist eine Bohrung 25 auf, die durch ein Verschlussorgan verschließbar ist. Das Verschlussorgan weist eine Verschlusskugel 26 auf, die mittels einer Stellstange 27 in Verschlussstellung haltbar ist. Die Stellstange 27 ist in Abhängigkeit vom Lastzustand des Motors derart verstellbar, dass in der Ruhestellung und in der Teillaststellung die Verschlusskugel 26 in der Schließposition gehalten wird und in der Volllaststellung die Verschlusskugel freigibt, so dass der Kraftstoff durch eine Leitung 28 abfließen kann. Es sind jedoch auch anders aufgebaute, in Abhängigkeit von der Motorleistung aufund zugesteuerte Verschlussorgane verwendbar.The upper end face 15 of the two-part nozzle needle 4 is located in the in FIG. 1 illustrated rest position at a distance h1 from the lower end face 16 of a guided in the housing part 2 in the axial direction of the control piston 17. In this case, the control piston 17 is located with the edge of its lower end face 16 to an annular stop 18 fixed to the housing. The control piston 17 passes through an annular chamber 19, which communicates via a line 20 with the fuel-carrying line 7 in connection. From the chamber 19, a line 21 in the control piston 17 leads to a pressure chamber 22 above the upper end face 23 of the control piston 17. The pressure chamber 22 is bounded laterally by the housing part 2 and above by a plate-shaped stop 24. The stop 24 has a bore 25 which can be closed by a closure member. The closure member has a closure ball 26 which is durable by means of an actuating rod 27 in the closed position. The control rod 27 is adjustable in dependence on the load condition of the engine such that in the rest position and in the partial load position, the closure ball 26 is held in the closed position and releases the closure ball in the full load position, so that the fuel can flow through a line 28. However, it is also differently constructed, depending on the engine power aufgesteuert and zugesteuerte closure organs used.

Wird in der Einstellung für den Teillastbereich, in der das Verschlussorgan 26, 27 geschlossen ist Kraftstoff durch die Leitung 7 unter Druck eingeleitet so baut sich über die Leitungen 20, 21 im Druckraum 22 ebenfalls Druck auf, der den Steuerkolben 17 gegen den Anschlag 18 drückt. Gleichzeitig wird die Düsennadel 4 vom Sitz 9 abgehoben bis ihre Stirnfläche 15 zur Anlage an der Stirnfläche 16 kommt. Bei entsprechender Bemessung einerseits der die Düsennadel 4 in die Öffnungsbewegung versetzenden Flächen und andererseits der Stirnfläche 23 bleibt der Steuerkolben 17 in Folge des Drucks im Druckraum 20 in Anlage an dem Anschlag 18. Die Düsennadel 4 kann sich daher nur um den Weg h1 soweit bewegen, dass Kraftstoff über den Vorlageraum 11 aus den Spritzlöchern 12 austritt.If in the setting for the partial load range, in which the closure member 26, 27 is closed, fuel is introduced under pressure through the line 7, pressure also builds up via the lines 20, 21 in the pressure chamber 22, which presses the control piston 17 against the stop 18 , At the same time the nozzle needle 4 is lifted from the seat 9 until its end face 15 comes to bear against the end face 16. With appropriate dimensioning on the one hand of the nozzle needle 4 in the opening movement offset surfaces and on the other hand, the end face 23 of the control piston 17 remains in contact with the stopper 18 as a result of pressure in the pressure chamber 20, the nozzle needle 4 can therefore move only so far as the path h1 that fuel exits via the Vorlageraum 11 from the spray holes 12.

Bei Umstellung der Stellstange 27 auf Volllastbetrieb gibt diese die Verschlusskugel 26 frei. Tritt jetzt der Kraftstoff durch die Leitungen 20, 21 in den Druckraum 22, so fließt er über die Leitung 28 ab. Der Steuerkolben 17 kann sich daher zusätzlich um den Weg h2 bis zur Anlage an dem Anschlag 24 bewegen. Dieser Bewegung folgt die Düsennadel 4. Dabei tritt der Steuerzapfen 10 aus dem Vorlageraum 13 aus. Der Kraftstoff gelangt daher auch zu den Spritzlöchem 14.When changing the control rod 27 to full load operation, this releases the closure ball 26. If the fuel now passes through the lines 20, 21 into the pressure chamber 22, it flows via the line 28. The control piston 17 can therefore additionally move around the path h 2 until it abuts against the stop 24. This movement is followed by the nozzle needle 4. In this case, the control pin 10 exits from the Vorlageraum 13. The fuel therefore also passes to the Spritzlöchem 14th

Die Anordnung gemäß Figur 2 ist im Prinzip ebenso aufgebaut wie die nach Figur 1. Lediglich ist hier die Kammer 19 an eine Leitung 30 angeschlossen, der mittels einer Pumpe 31 Schmieröl unter Druck zugeführt wird. Dieses Schmieröl gelangt dann über die Leitung 21 in den Druckraum 22. Die weitere Funktion stimmt mit der Anordnung gemäß Figur 1 überein. Es besteht auch die Möglichkeit, den Druckraum 22 mit einem Druckfluid aus einem gesonderten Flüssigkeitskreislauf zu beaufschlagen.The arrangement according to FIG. 2 is in principle just as structured as the one after FIG. 1 , Only here is the chamber 19 connected to a line 30 which is supplied by means of a pump 31 lubricating oil under pressure. This lubricating oil then passes via the line 21 into the pressure chamber 22. The other function is consistent with the arrangement according to FIG. 1 match. It is also possible to pressurize the pressure chamber 22 with a pressure fluid from a separate fluid circuit.

Claims (6)

  1. A fuel injection nozzle having a housing (1, 2, 3) arranged in which there is a nozzle needle (4) which is held in the closed position under the action of a spring (8) by being positioned against a seat (9) and which can be controlled open by the pressure of the injected fuel, having a control piston (17) to which a pressure fluid can be applied or which can be relieved from pressure for transfer into one of two different axial positions and which limits the opening path of the nozzle needle (4) to free one or more rows of spray holes (12, 14), wherein the end face (23) of the control piston (17) that is remote from the nozzle needle (4) has pressure applied to it in a partial-load position limiting the opening path of the nozzle needle to free one row of spray holes (12) and is relieved from pressure in a full-load position that frees all the rows of spray holes (12, 14) arranged one above the other, wherein for precise definition of the operating positions for both load ranges the control piston (17) in the partial-load position rests with its end face (16) that faces the nozzle needle (4) against a stop (18), which is secure with respect to the housing, so that by virtue of co-ordinated dimensioning, on the one hand, of the faces setting the nozzle needle (4) into the opening movement and, on the other hand, of the end face (23) the control piston (17) in consequence of the pressure in a pressure chamber (22), which is arranged above the control piston (17) and to which pressure fluid can be applied, remains positioned against the stop (18), the control piston (17) in the full-load position rests with its end face (23), which is remote from the nozzle needle (4), against a stop (24), which is secure with respect to the housing, and the pressure chamber (22) is relieved from pressure in the full-load position by means of a closing part (26, 27) which is controlled as a function of the load state of the motor, characterised in that arranged downstream of the seat (9) of the nozzle needle (4) there is a collecting space (11) leading to the first row of spray holes (12), and the nozzle needle (4) has a control pin (10) that passes through the collecting space and, sealing in the rest and partial-load position, projects into a further collecting space (13) for the remaining spray holes and frees the inflow to the further collecting space (13) in the full-load position.
  2. A fuel injection nozzle according to claim 1, characterised in that the control piston (17) has a line (21) that leads from a lateral annular chamber (19) for the pressure fluid to the pressure chamber (22).
  3. A fuel injection nozzle according to claim 1 or 2, characterised in that the closing part (26, 27) has an adjusting rod (27) that is activated as a function of the motor power and holds a closing ball (26) in the closed position in the partial-load range.
  4. A fuel injection nozzle according to one of the preceding claims, characterised in that fuel is used as the pressure fluid.
  5. A fuel injection nozzle according to one of claims 1-3, characterised in that lubricating oil is used as the pressure fluid.
  6. A fuel injection nozzle according to claim 5, characterised in that a pump (31) that increases the pressure is provided in the lubricating-oil inflow (30).
EP05000209A 2004-01-16 2005-01-07 Fuel injection nozzle Not-in-force EP1555429B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002286 2004-01-16
DE102004002286A DE102004002286A1 (en) 2004-01-16 2004-01-16 fuel Injector

Publications (2)

Publication Number Publication Date
EP1555429A1 EP1555429A1 (en) 2005-07-20
EP1555429B1 true EP1555429B1 (en) 2009-08-12

Family

ID=34609581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05000209A Not-in-force EP1555429B1 (en) 2004-01-16 2005-01-07 Fuel injection nozzle

Country Status (6)

Country Link
US (1) US20050230501A1 (en)
EP (1) EP1555429B1 (en)
JP (1) JP2005201274A (en)
KR (1) KR20050075719A (en)
CN (1) CN1641207B (en)
DE (2) DE102004002286A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014251A1 (en) * 2008-03-13 2009-09-17 Man Diesel Se Injection valve for direct injection
DE102009001131A1 (en) * 2008-12-09 2010-06-10 Robert Bosch Gmbh fuel injector
DE102008061400A1 (en) 2008-12-10 2010-06-17 Man Diesel Se Fuel injection valve for an internal combustion engine
JP5120293B2 (en) * 2009-02-20 2013-01-16 株式会社デンソー Fuel injection valve
CN103615344A (en) * 2013-11-29 2014-03-05 哈尔滨工程大学 Diesel injector capable of successively injecting oil
NL1041770B1 (en) * 2016-03-18 2017-10-03 Cereus Tech B V Improved fuel injection devices.
DE102016215637A1 (en) * 2016-08-19 2018-02-22 Robert Bosch Gmbh fuel Injector
CN109869252A (en) * 2019-03-15 2019-06-11 江苏大学 A kind of high frequency response fuel injector of Design of High Pressure Common Rail Diesel Engine

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655793A1 (en) * 1976-12-09 1978-06-22 Maschf Augsburg Nuernberg Ag CONTROLLED MULTI-HOLE INJECTION NOZZLE
DE2711393A1 (en) * 1977-03-16 1978-09-21 Bosch Gmbh Robert FUEL INJECTOR
JPS6382066A (en) * 1986-09-25 1988-04-12 Sony Corp Image pickup device with electronic zooming function
DE3818862C2 (en) * 1987-06-19 1999-01-07 Volkswagen Ag Fuel injector
DE4123721C1 (en) * 1991-07-17 1992-06-17 Steyr-Daimler-Puch Ag, Wien, At Fuel injection system with pump and nozzle units - has laterally coupled pump duct to chamber in piston bush
DE4408245A1 (en) * 1994-03-11 1995-09-14 Bosch Gmbh Robert Injection nozzle for internal combustion engines
JPH10281038A (en) * 1997-04-01 1998-10-20 Denso Corp Fuel injection valve
GB9811649D0 (en) * 1998-05-29 1998-07-29 Lucas Ind Plc Fuel injector
JP3823540B2 (en) * 1998-06-05 2006-09-20 株式会社デンソー Fuel injection valve for internal combustion engine
EP1041272B1 (en) * 1999-04-01 2004-10-27 Delphi Technologies, Inc. Fuel injector
DE19939448A1 (en) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Injector
DE19946906A1 (en) * 1999-09-30 2001-04-05 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19947196A1 (en) * 1999-10-01 2001-04-05 Bosch Gmbh Robert Fuel injection device for diesel engine has control valve for regulating fuel feed from high pressure space to injection valve
JP4239332B2 (en) * 1999-11-29 2009-03-18 株式会社豊田中央研究所 Fuel injection device for internal combustion engine
DE10100512A1 (en) * 2000-02-07 2001-08-09 Bosch Gmbh Robert Injector
DE10031582A1 (en) * 2000-06-29 2002-01-17 Bosch Gmbh Robert Pressure controlled injector with controlled nozzle needle
DE10033426B4 (en) * 2000-07-10 2004-10-14 Robert Bosch Gmbh Injector / nozzle needle combination with control room coupling
CA2427472A1 (en) * 2000-10-27 2002-06-06 Tae Kook Kim Double and triple readout assay systems
DE10055268A1 (en) * 2000-11-08 2002-05-23 Bosch Gmbh Robert Pressure controlled injector of a high pressure accumulator injection system
JP3518521B2 (en) * 2001-04-11 2004-04-12 トヨタ自動車株式会社 Fuel injection control device for internal combustion engine
EP1283336B1 (en) * 2001-08-06 2007-04-11 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
US6725838B2 (en) * 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same
JP3882680B2 (en) * 2001-11-16 2007-02-21 株式会社デンソー Fuel injection nozzle

Also Published As

Publication number Publication date
DE102004002286A1 (en) 2005-08-11
DE502005007871D1 (en) 2009-09-24
CN1641207B (en) 2010-06-23
EP1555429A1 (en) 2005-07-20
CN1641207A (en) 2005-07-20
JP2005201274A (en) 2005-07-28
KR20050075719A (en) 2005-07-21
US20050230501A1 (en) 2005-10-20

Similar Documents

Publication Publication Date Title
EP1555429B1 (en) Fuel injection nozzle
EP1772618B1 (en) Common rail injector
EP2108080B1 (en) Injector for injecting fuel into combustion chambers of internal combustion engines
EP2102486B1 (en) Injector with an axial pressure-compensating control valve
DE69814990T2 (en) Injector
WO2001073287A1 (en) Injection valve with bypass throttle
DE29717649U1 (en) Directly controlled injection valve, in particular fuel injection valve
CH686845A5 (en) Control arrangement for an injection valve for internal combustion engines.
EP1144842B1 (en) Injector for a fuel injection system for internal combustion engines comprising an injector needle that projects into the valve control space
DE10353045A1 (en) Fuel injection valve
EP1117921A1 (en) Common rail injector
DE102008035087B4 (en) Injector
DE19716226A1 (en) Fuel injection valve for internal combustion engines
WO2005019638A1 (en) Fuel injection valve for internal combustion engines
EP0240693B1 (en) Fuel injector for internal-combustion engines
DE10132249A1 (en) Fuel injector with force-balanced control valve
DE102005023368B4 (en) Nozzle assembly for an injection valve and injection valve
DE10050599B4 (en) Injection valve with a pump piston
DE3117018A1 (en) FUEL INJECTION NOZZLE
DE10121340A1 (en) Common rail injector for internal combustion engine fuel injection system has casing and intermediate plate bounding control chamber implemented in one piece with inlet and outlet choke
EP2642110B1 (en) Fuel injector valve
DE10134526B4 (en) Switching valve for fuel injection system
DE19756669A1 (en) Valve for controlling liquids
EP3184803B1 (en) Fuel injector
WO2005026525A1 (en) Fuel-injection valve for internal combustion engines

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 IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20050729

AKX Designation fees paid

Designated state(s): CH DE FI IT LI

17Q First examination report despatched

Effective date: 20061114

17Q First examination report despatched

Effective date: 20061114

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAN DIESEL SE

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): CH DE FI IT LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. AG PATENT- UND MARKENANWAELTE VSP

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 502005007871

Country of ref document: DE

Date of ref document: 20090924

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: AN DIESEL & TURBO SE

Free format text: MAN DIESEL SE#STADTBACHSTRASSE 1#86153 AUGSBURG (DE) -TRANSFER TO- MAN DIESEL & TURBO SE#STADTBACHSTRASSE 1#86153 AUGSBURG (DE)

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

Ref country code: CH

Payment date: 20100125

Year of fee payment: 6

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

Ref country code: IT

Payment date: 20100123

Year of fee payment: 6

Ref country code: FI

Payment date: 20100115

Year of fee payment: 6

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

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

Ref country code: DE

Payment date: 20100121

Year of fee payment: 6

26N No opposition filed

Effective date: 20100517

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: LI

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

Effective date: 20110131

Ref country code: CH

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

Effective date: 20110131

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

Ref country code: FI

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

Effective date: 20110107

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005007871

Country of ref document: DE

Effective date: 20110802

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

Ref country code: IT

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

Effective date: 20110107

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: 20110802