WO2003012283A1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- WO2003012283A1 WO2003012283A1 PCT/DE2002/001642 DE0201642W WO03012283A1 WO 2003012283 A1 WO2003012283 A1 WO 2003012283A1 DE 0201642 W DE0201642 W DE 0201642W WO 03012283 A1 WO03012283 A1 WO 03012283A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- piston
- master piston
- fuel injection
- coupler
- 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.)
- Ceased
Links
Classifications
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- 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
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- 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
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- 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
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- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- a hydraulic coupler for a piezoelectric actuator of a fuel injector with an outwardly opening valve needle in which a master piston and a slave piston are arranged in a common axis of symmetry, and a hydraulic chamber is arranged between the two pistons ,
- a coupler spring is arranged in the hydraulic chamber, which presses the master piston and the slave piston apart, the master piston being biased in the direction of the actuator and the slave piston in one working direction toward a valve needle.
- a disc spring is arranged in the hydraulic chamber, which acts on the master piston at its end facing the slave piston and is supported against a step of a valve body.
- this stroke movement is transmitted to the slave piston by the pressure of a hydraulic fluid in the hydraulic chamber, since the hydraulic fluid in the hydraulic chamber cannot be compressed and only a small proportion of the hydraulic fluid through annular gaps between the master piston and one Guide bore and slave piston and a guide bore during the short period of a stroke can escape.
- the actuator In the idle phase, when the actuator does not exert any pressure on the master cylinder, the spring pushes the master piston and the slave piston apart and the resulting negative pressure penetrates the hydraulic fluid into the hydraulic chamber through the annular gaps and refills it.
- the displacement transformer automatically adjusts to linear expansion and expansion of a fuel injector due to pressure.
- a disadvantage of this known prior art is that the coupler spring arranged between the master piston and slave piston acts against the force of a closing spring of the outwardly opening valve needle and thus delays the closing movement of the valve needle and reduces the sealing effect of the valve needle in a valve seat.
- the spring force of the coupler spring can therefore only be a fraction of the tension force of the closing spring of the valve needle. Due to the disc spring arranged in the hydraulic chamber, which is supported against the valve body, a sufficiently large pretensioning force of the master piston relative to the actuator cannot be achieved, since the narrow installation space and the short effective travel of the disc spring limit the options for adapting to the force required.
- the fuel injector according to the invention with the Characteristic features of the main claim has the advantage that the coupler spring does not act against the closing force of a closing spring of the valve needle and thus the closing dynamics and the sealing effect of the sealing seat of the valve body on the valve seat surface is not reduced.
- the refilling time of the hydraulic chamber is also advantageously minimized.
- actuator biasing force of the coupler spring can be compensated on the actuator.
- the slave piston is advantageously non-positively connected to the valve needle.
- master piston and slave piston are guided in a common bore.
- the coupler spring element can be a spiral spring enclosing the master piston.
- Fig. 1 shows a schematic section through an embodiment of a fuel injector according to the invention.
- FIG. 1 The embodiment of a fuel injection valve 1 according to the invention shown in FIG. 1 has a valve needle 2 with a valve closing body 3.
- the valve closing body 3 interacts with a valve seat surface 4 to form a valve sealing seat 5, the valve seat surface 4 is formed in a valve seat section 6 of a valve body 7, the valve seat section 6 facing a combustion chamber (not shown) of an internal combustion engine and the valve closing body 3 by a movement in the direction of the combustion chamber opens the valve sealing seat 5.
- a slave piston 9 is non-positively connected to the valve needle 2 via a weld 8.
- a valve closing spring 10 bears against the slave piston 9 and is supported against a spring support 11 of the valve seat section 6.
- the slave piston 9 is guided in a guide bore 13.
- a pressure chamber 14 is formed in the guide bore 13 between the master piston 12 and slave piston 9.
- a piston spring system 16 is formed on the master piston 12 on its side facing an actuator 15 of the fuel injection valve 1.
- a coupler spring 17 bears against the piston spring system 16 and is supported by a spring system 18 of the valve body 7.
- the master piston 12 is biased in the direction of the actuator 15 by the spring force of the coupler spring 17.
- Form slave piston 9, master piston 12, pressure chamber 14, guide bore 13 and coupler spring 17 a hydraulic coupler 19.
- the coupler spring 17 is designed as a spiral spring. '
- the master piston 12 bears against a tappet 20 of an actuator head 21. Via an actuator head spring 22, the actuator head 21 is pressed against the actuator 15 with a prestressing force.
- a cutting disc 23 is formed in one piece with the valve body 7 and penetrated by a bore 24 through which the plunger 20 is passed.
- a corrugated tube 26 is sealingly connected to the plunger 20 via a weld seam 25 and is sealingly connected to the cutting disc 23 • via a further weld seam 27.
- An actuator chamber 28 is separated from an upper fuel chamber 29 and sealed from it by a separating disk 23 and corrugated tube 26. If the actuator 15 exerts a lifting force on the actuator head 21 and transmits a lifting movement to the master piston 12 via the tappet 20, the corrugated tube 26 can follow this lifting movement elastically by expansion and seal the upper fuel chamber 29 from the actuator chamber 28.
- the fuel enters the upper fuel chamber 29 via a fuel inlet 30 and into a lower fuel chamber 32 via a fuel bore 31 and to the valve sealing seat 5.
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
Description
Brennstoffeinspritzventil Fuel injector
Stand der TechnikState of the art
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention relates to a fuel injector according to the preamble of the main claim.
Aus der DE 195 00 706 AI ist ein hydraulischer Koppler für einen piezoelektrischen Aktor eines Brennstoff- einspritzventils mit einer nach außen öffnenden Ventilnadel bekannt, bei der ein Geberkolben und ein Nehmerkolben in einer gemeinsamen Symmetrieachse angeordnet sind, und eine Hydraulikkammer zwischen den beiden Kolben angeordnet ist. In der Hydraulikkammer ist eine Kopplerfeder angeordnet, die den Geberkolben und den Nehmerkolben auseinander drückt, wobei der Geberkolben in Richtung des Aktors und der Nehmerkolben in einer Arbeitsrichtung zu einer Ventilnadel hin vorgespannt werden. Weiterhin ist in der Hydraulikkammer eine Tellerfeder angeordnet, die an den Geberkolben an seinem de Nehmerkolben zugewandten Ende angreift und sich gegen eine Stufung eines Ventilkörpers abstützt. Wenn der Aktor auf den Geberkolben eine Hubbewegung überträgt, wird diese Hubbewegung durch den Druck eines Hydrauli fluids in der Hydraulikkammer auf den Nehmerkolben übertragen, da das Hydraulikfluid in der Hydraulikkammer sich nicht zusammenpressen läßt und nur ein geringer Anteil des Hydraulikfluids durch Ringspalte zwischen Geberkolben und einer Führungsbohrung und Nehmerkolben und einer Führungsbohrung während des kurzen Zeitraumes eines Hubes entweichen kann.From DE 195 00 706 AI a hydraulic coupler for a piezoelectric actuator of a fuel injector with an outwardly opening valve needle is known, in which a master piston and a slave piston are arranged in a common axis of symmetry, and a hydraulic chamber is arranged between the two pistons , A coupler spring is arranged in the hydraulic chamber, which presses the master piston and the slave piston apart, the master piston being biased in the direction of the actuator and the slave piston in one working direction toward a valve needle. Furthermore, a disc spring is arranged in the hydraulic chamber, which acts on the master piston at its end facing the slave piston and is supported against a step of a valve body. If the actuator transmits a stroke movement to the master piston, this stroke movement is transmitted to the slave piston by the pressure of a hydraulic fluid in the hydraulic chamber, since the hydraulic fluid in the hydraulic chamber cannot be compressed and only a small proportion of the hydraulic fluid through annular gaps between the master piston and one Guide bore and slave piston and a guide bore during the short period of a stroke can escape.
In der Ruhephase, wenn der Aktor keine Druckkraft auf den Geberzylinder ausübt, werden durch die Feder der Geberkolben und der Nehmerkolben auseinander gedrückt und durch den entstehenden Unterdruck dringt über die Ringspalte das Hydraulikfluid in die Hydraulikkammer ein und füllt diese wieder auf. Dadurch stellt der Wegtransformator sich automatisch auf Längenausdehnungen und druckbedingte Dehnungen eines Brennstoffeinspritzventils ein.In the idle phase, when the actuator does not exert any pressure on the master cylinder, the spring pushes the master piston and the slave piston apart and the resulting negative pressure penetrates the hydraulic fluid into the hydraulic chamber through the annular gaps and refills it. As a result, the displacement transformer automatically adjusts to linear expansion and expansion of a fuel injector due to pressure.
Nachteilig an diesem bekannten Stand der Technik ist, daß die zwischen Geberkolben und Nehmerkolben angeordnete Kopplerfeder entgegen der Kraft einer Schließfeder der nach außen öffnenden Ventilnadel wirkt und somit die Schließbewegung der Ventilnadel verzögert und die Abdichtwirkung der Ventilnadel in einem Ventilsitz reduziert. Die Federkraft der Kopplerfeder kann daher nur einen Bruchteil der Spannkraft der Schließfeder der Ventilnadel betragen. Durch die in der Hydraulikkammer angeordnete Tellerfeder, die sich gegen den Ventilkörper abstützt, kann keine ausreichend große Vσrspannkraft des Geberkolbens gegenüber dem Aktor bewirkt werden, da durch den engen Einbauraum sowie den kurzen wirksamen Weg der Tellerfeder die Anpassungsmöglichkeiten an den benötigten Kraftverlauf beschränkt sind.A disadvantage of this known prior art is that the coupler spring arranged between the master piston and slave piston acts against the force of a closing spring of the outwardly opening valve needle and thus delays the closing movement of the valve needle and reduces the sealing effect of the valve needle in a valve seat. The spring force of the coupler spring can therefore only be a fraction of the tension force of the closing spring of the valve needle. Due to the disc spring arranged in the hydraulic chamber, which is supported against the valve body, a sufficiently large pretensioning force of the master piston relative to the actuator cannot be achieved, since the narrow installation space and the short effective travel of the disc spring limit the options for adapting to the force required.
Dies führt zu einer relativ langen Wiederbefüllzeit der Hydraulikkammer zwischen den Betätigungszeiten des Aktors, wenn durch die Kraft der Kopplerfeder Geberkolben und Neh erkolben auseinander gedrückt werden und über die Ringspalte Brennstoff in die Hydraulikkammer nachfließt. Für eine geringe Wiederbefüllzeit ist eine starke Vorspannung durch die Kopplerfeder nötig, die durch den dargelegten Stand der Technik nur schlecht zu verwirklichen ist.This leads to a relatively long refilling time of the hydraulic chamber between the actuation times of the actuator when, due to the force of the coupler spring, master piston and slave piston are pressed apart and fuel flows into the hydraulic chamber via the annular gaps. For a short refilling time, a strong pretension by the coupler spring is necessary, which is difficult to achieve due to the state of the art described.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Kopplerfeder nicht gegen die Schließkraft einer Schließfeder der Ventilnadel wirkt und somit die Schließdynamik und die abdichtende Wirkung des Dichtsitzes des Ventilkörpers an der Ventilsitzfläche nicht vermindert wird.The fuel injector according to the invention with the Characteristic features of the main claim has the advantage that the coupler spring does not act against the closing force of a closing spring of the valve needle and thus the closing dynamics and the sealing effect of the sealing seat of the valve body on the valve seat surface is not reduced.
Weiterhin vorteilhaft wird die Wiederbefüllzeit der Hydraulikkammer minimiert.The refilling time of the hydraulic chamber is also advantageously minimized.
Durch ' eine entsprechend kräftige Dimensionierung und Auslegung .des Aktors kann die Vorspannkraft der Kopplerfeder auf den Aktor ausgeglichen werden.By 'a correspondingly strong dimensioning and design .des actuator biasing force of the coupler spring can be compensated on the actuator.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.The measures listed in the subclaims allow advantageous further developments of the fuel injector specified in the main claim.
Vorteilhaft ist der Nehmerkolben mit der Ventilnadel kraftschlüssig verbunden.The slave piston is advantageously non-positively connected to the valve needle.
Dadurch ist keine weitere Feder nötig, die den Nehmerkolben an der Ventilnadel in Anlage hält.This means that no additional spring is required to hold the slave piston in contact with the valve needle.
In günstiger Ausführungsform sind Geberkolben und Nehmerkolben in einer gemeinsamen Bohrung geführt.In a favorable embodiment, master piston and slave piston are guided in a common bore.
Dadurch ist die Herstellung wesentlich vereinfacht, da lediglich eine exakt gefertigte Bohrung erforderlich ist.This significantly simplifies production, since only a precisely manufactured bore is required.
Das- Kopplerfederelement kann eine den Geberkolben umschließende Spiralfeder sein.The coupler spring element can be a spiral spring enclosing the master piston.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert . Es zeigt : Fig. 1 einen schematischen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils .An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. It shows : Fig. 1 shows a schematic section through an embodiment of a fuel injector according to the invention.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die in Fig. 1 dargestellte Ausführungsform eines erfindungsgemäßen Brennstoffeinspritzventils 1 weist eine Ventilnadel 2 mit einem Ventilschließkörper 3 auf. Der Ventilschließkörper 3 wirkt mit einer Ventilsitzfläche 4 zu einem Ventildichtsitz 5 zusammen, Die Ventilsitzfläche 4 ist in einem Ventilsitzabschnitt 6 eines Ventilkörpers 7 ausgeformt, wobei der Ventilsitzabschnitt 6 einem nicht dargestellten Brennraum einer Brennkraftmaschine zugewandt ist und der Ventilschließkörper 3 durch eine Bewegung in Richtung des Brennraums den Ventildichtsitz 5 öffnet. Es handelt sich um ein Brennstoffeinspritzventil 1 mit nach außen öffnender Ventilnadel 2.The embodiment of a fuel injection valve 1 according to the invention shown in FIG. 1 has a valve needle 2 with a valve closing body 3. The valve closing body 3 interacts with a valve seat surface 4 to form a valve sealing seat 5, the valve seat surface 4 is formed in a valve seat section 6 of a valve body 7, the valve seat section 6 facing a combustion chamber (not shown) of an internal combustion engine and the valve closing body 3 by a movement in the direction of the combustion chamber opens the valve sealing seat 5. It is a fuel injector 1 with valve needle 2 opening outwards.
Mit der Ventilnadel 2 ist über eine Schweißnaht 8 kraftschlüssig ein Nehmerkolben 9 verbunden. An dem Nehmerkolben 9 liegt eine Ventilschließfeder 10 an, die sich gegen eine Federauflage 11 des Ventilsitzabschnitts 6 abstützt .A slave piston 9 is non-positively connected to the valve needle 2 via a weld 8. A valve closing spring 10 bears against the slave piston 9 and is supported against a spring support 11 of the valve seat section 6.
Der Nehmerkolben 9 ist ebenso wie ein Geberkolben 12 in einer Führungsbohrung 13 geführt. Zwischen Geberkolben 12 und Nehmerkolben 9 wird in der Führungsbohrung 13 ein Druckraum 14 gebildet.Like a master piston 12, the slave piston 9 is guided in a guide bore 13. A pressure chamber 14 is formed in the guide bore 13 between the master piston 12 and slave piston 9.
An dem Geberkolben 12 ist an seiner einem Aktor 15 des Brennstoffeinspritzventils 1 zugewandten Seite eine Kolbenfederanlage 16 ausgeformt. Eine Kopplerfeder 17 liegt an der Kolbenfederanlage 16 an und stützt sich über eine Federanlage 18 des Ventilkörpers 7 ab. Durch die Federkraft der Kopplerfeder 17 wird der Geberkolben 12 in Richtung des Aktors 15 vorgespannt. Nehmerkolben 9, Geberkolben 12, Druckraum 14, Führungsbohrung 13 und Kopplerfeder 17 bilden einen hydraulischen Koppler 19. Die Kopplerfeder 17 ist als Spiralfeder ausgebildet.' A piston spring system 16 is formed on the master piston 12 on its side facing an actuator 15 of the fuel injection valve 1. A coupler spring 17 bears against the piston spring system 16 and is supported by a spring system 18 of the valve body 7. The master piston 12 is biased in the direction of the actuator 15 by the spring force of the coupler spring 17. Form slave piston 9, master piston 12, pressure chamber 14, guide bore 13 and coupler spring 17 a hydraulic coupler 19. The coupler spring 17 is designed as a spiral spring. '
Der Geberkolben 12 liegt an einem Stößel 20 eines Aktorkopfes 21 an. Über eine Aktorkopffeder 22 wird der Aktorkopf 21 mit einer Vorspannkraft gegen den Aktor 15 gedrückt. Eine Trennscheibe 23 ist einstückig mit dem Ventilkörper 7 ausgebildet und von einer Bohrung 24 durchdrungen, durch die der Stößel 20 hindurchgeführt ist. Über eine Schweißnaht 25 ist mit dem Stößel 20 dichtend ein Wellrohr 26 verbunden, das über eine weitere Schweißnaht 27 dichtend mit der Trennscheibe 23 • verbunden ist. Durch Trennscheibe 23 und Wellrohr 26 wird ein Aktorraum 28 von einem oberen Brennstoffraum 29 getrennt und gegenüber diesem abgedichtet. Wenn der Aktor 15 auf den Aktorkopf 21 eine Hubkraft ausübt und über den Stößel 20 eine Hubbewegung an den Geberkolben 12 überträgt, kann das Wellrohr 26 dieser Hubbewegung durch Ausdehnung elastisch folgen und den oberen Brennstoffräum 29 gegenüber dem Aktorraum 28 abdichten.The master piston 12 bears against a tappet 20 of an actuator head 21. Via an actuator head spring 22, the actuator head 21 is pressed against the actuator 15 with a prestressing force. A cutting disc 23 is formed in one piece with the valve body 7 and penetrated by a bore 24 through which the plunger 20 is passed. A corrugated tube 26 is sealingly connected to the plunger 20 via a weld seam 25 and is sealingly connected to the cutting disc 23 • via a further weld seam 27. An actuator chamber 28 is separated from an upper fuel chamber 29 and sealed from it by a separating disk 23 and corrugated tube 26. If the actuator 15 exerts a lifting force on the actuator head 21 and transmits a lifting movement to the master piston 12 via the tappet 20, the corrugated tube 26 can follow this lifting movement elastically by expansion and seal the upper fuel chamber 29 from the actuator chamber 28.
Über einen BrennstoffZulauf 30 gelangt der Brennstoff in den oberen Brennstoffraum 29 und über eine Brennstoffbohrung 31 in einen unteren Brennstoffraum 32 und zu dem Ventildichtsitz 5.The fuel enters the upper fuel chamber 29 via a fuel inlet 30 and into a lower fuel chamber 32 via a fuel bore 31 and to the valve sealing seat 5.
Wenn der Aktor 15 über den Aktorkopf 21 und den Stößel 20 auf den Geberkolben 12 eine Hubbewegung überträgt, wird auf den Brennstoff in dem Druckraum 14 Druck ausgeübt. Da der Brennstoff als Flüssigkeit nahezu inkompressibel ist, wird die Hubbewegung über den Nehmerkolben 9 auf die Ventilnadel 2 und den Ventilschließkörper '3 übertragen. Der Ventilschließkörper 3 wird ' aus dem Ventildichtsitz 5 angehoben und das Brennstoffeinspritzventil 1 öffnet.When the actuator 15 transmits a stroke movement to the master piston 12 via the actuator head 21 and the tappet 20, pressure is exerted on the fuel in the pressure chamber 14. Since the fuel as a liquid is nearly incompressible, the stroke movement on the slave piston 9 to the needle valve 2 and the valve closing body '3 is transmitted. Valve-closure member 3 'is raised from the valve seat 5 and the fuel injection valve 1 opens.
Wenn der Aktor 15 in seine Ruhelage zurückkehrt und der Aktorkopf 21 durch die Aktorkopffeder 22 ebenfalls in seine Ausgangslage zurückgezogen wird, wird der Geberkolben 12 von der Kopplerfeder 17 aus der Führungsbohrung 13 gezogen. Der Nehmerkolben 9 und die Ventilnadel 2 werden durch den Ventidichtsitz 5 als Anschlag in ihrer Ausgangslage gehalten . Durch die relativ große Federkraft der Kopplerfeder 17 entsteht daher ein Unterdruck in dem Druckraum 14 und Brennstoff fließt über den Ringspalt zwischen der Führungsbohrung 13 und dem Geberkolben 12 aus dem oberen - Brennstof f räum 29 einerseits und den Ringspalt zwischen dem Nehmerkolben 9 und dem unteren Brennstof f räum 32 andererseits nach .When the actuator 15 returns to its rest position and the actuator head 21 is also retracted into its starting position by the actuator head spring 22, the master piston 12 is pulled out of the guide bore 13 by the coupler spring 17. The slave piston 9 and the valve needle 2 are by the Valve sealing seat 5 held as a stop in its initial position. The relatively large spring force of the coupler spring 17 therefore creates a negative pressure in the pressure chamber 14 and fuel flows through the annular gap between the guide bore 13 and the master piston 12 from the upper - fuel chamber 29, on the one hand, and the annular gap between the slave piston 9 and the lower fuel f space 32 on the other hand.
Der unvermeidlich auftretende Verlust an Brennstoff im Druckraum 14 während der Hubphase des Aktors 15 wird vorteilhaft rasch ausgeglichen. Durch die erfindungsgemäße Ausführung des Brennstof f einspritzventils 1 wirkt die Federkraft der Kopplerfeder 17 nicht gegen die Federkraft der Ventilschließfeder 10 . The inevitable loss of fuel in the pressure chamber 14 during the lifting phase of the actuator 15 is advantageously quickly compensated. Due to the inventive design of the fuel injection valve 1, the spring force of the coupler spring 17 does not act against the spring force of the valve closing spring 10.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10137210.8 | 2001-07-30 | ||
| DE2001137210 DE10137210B4 (en) | 2001-07-30 | 2001-07-30 | Fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003012283A1 true WO2003012283A1 (en) | 2003-02-13 |
Family
ID=7693675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2002/001642 Ceased WO2003012283A1 (en) | 2001-07-30 | 2002-05-07 | Fuel injection valve |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10137210B4 (en) |
| WO (1) | WO2003012283A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1445473A1 (en) * | 2003-02-04 | 2004-08-11 | Siemens VDO Automotive S.p.A. | Metering device with dynamic sealing |
| EP2863048A1 (en) * | 2013-10-21 | 2015-04-22 | C.R.F. Società Consortile Per Azioni | Fuel electro-injector for a fuel injection system for an internal combustion engine |
| CN104948367A (en) * | 2014-03-31 | 2015-09-30 | 罗伯特·博世有限公司 | Fuel injection valve |
| US10676920B2 (en) | 2015-06-25 | 2020-06-09 | Pliteq Inc | Impact damping mat, equipment accessory and flooring system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10308915A1 (en) * | 2003-02-28 | 2004-09-09 | Robert Bosch Gmbh | Fuel injector |
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| DE19905152C1 (en) * | 1999-02-08 | 2000-07-27 | Univ Dresden Tech | Fuel injection nozzle for internal combustion engine has pressure accumulator with nozzle body in which nozzle needle, with central bore open to combustion chamber, is fitted |
| US6119952A (en) * | 1998-08-27 | 2000-09-19 | Siemens Aktiengesellschaft | Device and method for dosing fluid |
| US6213414B1 (en) * | 1999-04-28 | 2001-04-10 | Bobert Bosch Gmbh | Fuel injector |
| EP1111230A2 (en) * | 1999-12-22 | 2001-06-27 | Siemens Aktiengesellschaft | Hydraulic device for transmitting an actuator movement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59010904D1 (en) * | 1990-09-25 | 2000-05-31 | Siemens Ag | Arrangement for an adaptive, mechanical tolerance compensation acting in the stroke direction for the displacement transformer of a piezoelectric actuator |
| DE19950760A1 (en) * | 1999-10-21 | 2001-04-26 | Bosch Gmbh Robert | Fuel injection valve esp. for fuel injection systems of IC engines with piezo-electric or magneto-strictive actuator and valve closing body operable by valve needle working with valve |
-
2001
- 2001-07-30 DE DE2001137210 patent/DE10137210B4/en not_active Expired - Fee Related
-
2002
- 2002-05-07 WO PCT/DE2002/001642 patent/WO2003012283A1/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6143266A (en) * | 1984-08-07 | 1986-03-01 | Nippon Soken Inc | Fuel injector |
| DE4306072A1 (en) * | 1993-02-26 | 1994-09-08 | Siemens Ag | Device for opening and closing a passage opening in a housing |
| DE19500706A1 (en) | 1995-01-12 | 1996-07-18 | Bosch Gmbh Robert | Metering valve for dosing liquids or gases |
| DE19642441A1 (en) * | 1996-10-15 | 1998-04-16 | Bosch Gmbh Robert | Method for actuating a fuel injection valve for internal combustion engines |
| JPH11351098A (en) * | 1998-05-29 | 1999-12-21 | Lucas Ind Plc | Fuel injector |
| US6119952A (en) * | 1998-08-27 | 2000-09-19 | Siemens Aktiengesellschaft | Device and method for dosing fluid |
| DE19843535A1 (en) * | 1998-09-23 | 2000-03-30 | Bosch Gmbh Robert | Fuel injector |
| DE19905152C1 (en) * | 1999-02-08 | 2000-07-27 | Univ Dresden Tech | Fuel injection nozzle for internal combustion engine has pressure accumulator with nozzle body in which nozzle needle, with central bore open to combustion chamber, is fitted |
| US6213414B1 (en) * | 1999-04-28 | 2001-04-10 | Bobert Bosch Gmbh | Fuel injector |
| EP1111230A2 (en) * | 1999-12-22 | 2001-06-27 | Siemens Aktiengesellschaft | Hydraulic device for transmitting an actuator movement |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1445473A1 (en) * | 2003-02-04 | 2004-08-11 | Siemens VDO Automotive S.p.A. | Metering device with dynamic sealing |
| EP2863048A1 (en) * | 2013-10-21 | 2015-04-22 | C.R.F. Società Consortile Per Azioni | Fuel electro-injector for a fuel injection system for an internal combustion engine |
| US9970397B2 (en) | 2013-10-21 | 2018-05-15 | C.R.F. Societa' Consortile Per Azioni | Fuel electro-injector for a fuel injection system for an internal combustion engine |
| CN104948367A (en) * | 2014-03-31 | 2015-09-30 | 罗伯特·博世有限公司 | Fuel injection valve |
| US10676920B2 (en) | 2015-06-25 | 2020-06-09 | Pliteq Inc | Impact damping mat, equipment accessory and flooring system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10137210A1 (en) | 2003-02-20 |
| DE10137210B4 (en) | 2011-04-07 |
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