DE102004011095A1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- DE102004011095A1 DE102004011095A1 DE102004011095A DE102004011095A DE102004011095A1 DE 102004011095 A1 DE102004011095 A1 DE 102004011095A1 DE 102004011095 A DE102004011095 A DE 102004011095A DE 102004011095 A DE102004011095 A DE 102004011095A DE 102004011095 A1 DE102004011095 A1 DE 102004011095A1
- Authority
- DE
- Germany
- Prior art keywords
- nozzle needle
- fuel
- throttle
- pressure
- injection valve
- 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.)
- Withdrawn
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
- 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
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M47/027—Electrically actuated valves draining the chamber to release the 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
-
- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
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)
Abstract
Description
Die Erfindung geht von einem Kraftstoffeinspritzventil einer Brennkraftmaschine gemäß der im Oberbegriff des Patentanspruches 1 näher definierten Art aus.The Invention is based on a fuel injection valve of an internal combustion engine according to the preamble of claim 1 closer defined type.
Ein
derartiges Kraftstoffeinspritzventil ist aus der
Das
aus der
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Kraftstoffeinspritzventil mit den Merkmalen nach dem Oberbegriff des Patentanspruches 1 und einer äußeren Düsennadel mit mindestens einem Querkanal, über den Kraftstoff an den Umfang und an eine innere Druckstufe der inneren Düsennadel führbar ist, bietet die Möglichkeit, beim Öffnen der Nadeleinheit zunächst die innere Düsennadel und anschließend die äußere Düsennadel zu öffnen. Durch entsprechende Ausbildung der Druckstufen der inneren und der äußeren Düsennadel können dann optimierte Öffnungs- und Schließgeschwindigkeiten der beiden Düsennadeln erzielt werden. Ferner kann durch dieses Konzept, bei dem die äußere Düsennadel vorzugsweise in einer Hülse geführt ist, die in dem mit dem Kraftstoffzufuhrkanal verbundenen Hochdruckraum angeordnet ist, ein leckagefreies Kraftstoffeinspritzventil mit zwei ineinander geführten Düsennadeln realisiert werden.The Fuel injection valve according to the invention with the features according to the preamble of claim 1 and an outer nozzle needle with at least one cross channel, over the fuel to the periphery and to an internal pressure level of the inner nozzle needle feasible is the possibility of opening the Needle unit first the inner nozzle needle and subsequently the outer nozzle needle to open. By appropriate training of the pressure levels of the inner and outer nozzle needle can then optimized opening and closing speeds the two nozzle needles be achieved. Furthermore, through this concept, where the outer nozzle needle preferably guided in a sleeve, in the high pressure chamber connected to the fuel supply passage is arranged, a leak-free fuel injection valve with two intertwined nozzle needles will be realized.
Das Kraftstoffeinspritzventil nach der Erfindung kann insbesondere Bestandteil eines Common-Rail-Einspritzsystems sein und zur Einspritzung von unter einem Hochdruck stehenden Kraftstoff in einen Brennraum einer Dieselbrennkraftmaschine eines Kraftfahrzeuges dienen. In diesem Falle ist das Kraftstoffeinspritzventil zulaufseitig mit einem Hochdruckspeicher, der so genannten Common-Rail, verbunden, welcher sämtliche Kraftstoffeinspritzventile der betreffenden Brennkraftmaschine mit unter Hochdruck stehendem Kraftstoff versorgt.The Fuel injection valve according to the invention may in particular part a common-rail injection system and for the injection of under high pressure fuel into a combustion chamber of a Serve diesel engine of a motor vehicle. In this Case, the fuel injection valve is upstream with a high-pressure accumulator, the so-called common rail, connected, which all Fuel injection valves of the relevant internal combustion engine with supplied under high pressure fuel.
Die getrennte Ansteuerung zweier Reihen von Einspritzöffnungen bzw. Spritzlöchern führt dazu, dass jeweils eine gewisse Anzahl von Spritzlöchern freigegeben und dadurch auch bei kleinen Einspritzmengen ausreichend lange Einspritzdauern bei guter Zerstäubungsqualität gewährleistet werden können. Bei großen Einspritzmengen müssen aber auch keine übermäßig langen Einspritzdauern oder übermäßig hohe Einspritzdrücke in Kauf genommen werden.The separate control of two rows of injection openings or spray holes leads to each released a certain number of spray holes and thereby sufficiently long injection durations even with small injection quantities guaranteed with good atomization quality can be. at huge Injection quantities need but not too long Injections or excessively high Injection pressures be accepted.
Zur präzisen Abstimmung eines auf die innere Druckstufe der inneren Düsennadel wirkenden Kraftstoffdrucks kann der Querkanal der äußeren Düsennadel mit einer Drossel versehen sein.to precise Tuning a to the inner pressure level of the inner nozzle needle acting fuel pressure, the transverse channel of the outer nozzle needle be provided with a throttle.
Um die innere Düsennadel in Schließstellung halten zu können, ist sie zweckmäßigerweise mittels einer Schließfeder in Schließrichtung vorgespannt. Die Schließfeder stützt sich beispielsweise an einer Zwischenplatte eines Gehäuses des Kraftstoffeinspritzventils ab. Entsprechend ist auch die äußere Düsennadel zweckmäßigerweise mittels einer weiteren Schließfeder in Schließrichtung vorgespannt.Around the inner nozzle needle keep in closed position to be able to is it expediently by means of a closing spring in the closing direction biased. The closing spring supports For example, on an intermediate plate of a housing of the Fuel injection valve off. Corresponding is also the outer nozzle needle expediently by means of another closing spring in the closing direction biased.
Um bei einer Unterbrechung eines Einspritzvorganges ein im Wesentlichen gleichzeitiges Schließen der beiden Düsennadeln zu erreichen, ist an der inneren Düsennadel vorteilhafterweise ein Mitnehmer ausgebildet, der auf die äußere Düsennadel wirkt. Der Mitnehmer ist beispielsweise von der inneren Druckstufe gebildet.Around at an interruption of an injection process a substantially simultaneous closing the two nozzle needles it is advantageous to achieve at the inner nozzle needle a driver formed, which acts on the outer nozzle needle. The driver is formed, for example, by the inner pressure stage.
Des Weiteren kann die innere Düsennadel so ausgebildet sein, dass sie im geöffneten Zustand als Drossel für einen Kraftstoffzufluss in den Ventilsteuerraum wirkt und so ein Absenken des Druckniveaus in dem Ventilsteuerraum und damit das Öffnen der äußeren Düsennadel beschleunigt.Of Further, the inner nozzle needle can do so be trained that they are open Condition as throttle for a fuel flow into the valve control chamber acts and so on Lowering the pressure level in the valve control chamber and thus the opening of the outer nozzle needle accelerated.
Zur weiteren Optimierung der Öffnungs- und Schließgeschwindigkeiten der beiden Düsennadeln ist es vorteilhaft, wenn in dem Kraftstoffzufuhrkanal des Einspritzventils eine Kraftstoffdrossel angeordnet ist.to further optimization of the opening and closing speeds the two nozzle needles is it is advantageous if in the fuel supply passage of the injection valve a fuel throttle is arranged.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes nach der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further Advantages and advantageous embodiments of the subject to The invention are the description, the drawings and the claims removed.
Zeichnungdrawing
Ein Ausführungsbeispiel eines erfindungsgemäßen Kraftstoffeinspritzventils ist in der Zeichnung schematisch vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigenOne embodiment a fuel injection valve according to the invention is shown schematically simplified in the drawing and will explained in more detail in the following description. Show it
Beschreibung des Ausführungsbeispielsdescription of the embodiment
In
Das
Düsenmodul
Die
beiden Düsennadeln
Des
Weiteren ist die äußere Düsennadel
Die äußere Düsennadel
Ferner
weist die äußere Düsennadel
Die
Drosselplatte
Die
Zulaufdrossel
In
dem Ventilraum
Ein
Zulauf von Kraftstoff zu den Spritzlöchern
Die
innere Düsennadel
Dem
in
Das
in
Im
Ausgangszustand ist der piezoelektrische Aktor in einem unbestromten
Zustand, so dass sich das Ventilschließglied
Bei
einem Ansteuern des piezoelektrischen Aktors wird das Ventilschließglied
Wenn
eine Einspritzung von Kraftstoff in den Brennraum beendet werden
soll, wird das Ventilschließglied
Wenn
nur die innere Düsennadel
Claims (6)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011095A DE102004011095A1 (en) | 2004-03-06 | 2004-03-06 | Fuel injection valve |
PCT/EP2005/050122 WO2005085624A1 (en) | 2004-03-06 | 2005-01-13 | Fuel-injection valve |
DE502005003321T DE502005003321D1 (en) | 2004-03-06 | 2005-01-13 | FUEL INJECTION VALVE |
EP05701507A EP1727977B1 (en) | 2004-03-06 | 2005-01-13 | Fuel-injection valve |
AT05701507T ATE389796T1 (en) | 2004-03-06 | 2005-01-13 | FUEL INJECTION VALVE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011095A DE102004011095A1 (en) | 2004-03-06 | 2004-03-06 | Fuel injection valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004011095A1 true DE102004011095A1 (en) | 2005-09-22 |
Family
ID=34877505
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004011095A Withdrawn DE102004011095A1 (en) | 2004-03-06 | 2004-03-06 | Fuel injection valve |
DE502005003321T Active DE502005003321D1 (en) | 2004-03-06 | 2005-01-13 | FUEL INJECTION VALVE |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE502005003321T Active DE502005003321D1 (en) | 2004-03-06 | 2005-01-13 | FUEL INJECTION VALVE |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1727977B1 (en) |
AT (1) | ATE389796T1 (en) |
DE (2) | DE102004011095A1 (en) |
WO (1) | WO2005085624A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009046336A1 (en) | 2009-11-03 | 2011-05-05 | Robert Bosch Gmbh | Valve arrangement for controlling lifting movements and positions of nozzle needle in fuel injector, has compression spring with spring brackets that are arranged within circular-cylindrical surface and extended in circumferential direction |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006037175A1 (en) * | 2006-08-09 | 2008-02-14 | Robert Bosch Gmbh | An automotive fuel injection valve has concentric spring with elastic side-extensions subjected to lateral shift |
DE102006051583A1 (en) * | 2006-11-02 | 2008-05-08 | Robert Bosch Gmbh | Fuel injector with storage volume segment |
GB0801997D0 (en) | 2007-05-01 | 2008-03-12 | Delphi Tech Inc | Fuel injector |
US8690075B2 (en) * | 2011-11-07 | 2014-04-08 | Caterpillar Inc. | Fuel injector with needle control system that includes F, A, Z and E orifices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5899389A (en) * | 1997-06-02 | 1999-05-04 | Cummins Engine Company, Inc. | Two stage fuel injector nozzle assembly |
US6705543B2 (en) * | 2001-08-22 | 2004-03-16 | Cummins Inc. | Variable pressure fuel injection system with dual flow rate injector |
DE10155227A1 (en) * | 2001-11-09 | 2003-05-22 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10205970A1 (en) * | 2002-02-14 | 2003-09-04 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10254186A1 (en) * | 2002-11-20 | 2004-06-17 | Siemens Ag | Injector with a directly driven register nozzle needle for fuel injection into an internal combustion engine |
-
2004
- 2004-03-06 DE DE102004011095A patent/DE102004011095A1/en not_active Withdrawn
-
2005
- 2005-01-13 EP EP05701507A patent/EP1727977B1/en not_active Not-in-force
- 2005-01-13 AT AT05701507T patent/ATE389796T1/en not_active IP Right Cessation
- 2005-01-13 WO PCT/EP2005/050122 patent/WO2005085624A1/en active IP Right Grant
- 2005-01-13 DE DE502005003321T patent/DE502005003321D1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009046336A1 (en) | 2009-11-03 | 2011-05-05 | Robert Bosch Gmbh | Valve arrangement for controlling lifting movements and positions of nozzle needle in fuel injector, has compression spring with spring brackets that are arranged within circular-cylindrical surface and extended in circumferential direction |
Also Published As
Publication number | Publication date |
---|---|
EP1727977B1 (en) | 2008-03-19 |
DE502005003321D1 (en) | 2008-04-30 |
WO2005085624A1 (en) | 2005-09-15 |
ATE389796T1 (en) | 2008-04-15 |
EP1727977A1 (en) | 2006-12-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8141 | Disposal/no request for examination | ||
R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20110308 |