DE102006029392A1 - injector - Google Patents
injector Download PDFInfo
- Publication number
- DE102006029392A1 DE102006029392A1 DE200610029392 DE102006029392A DE102006029392A1 DE 102006029392 A1 DE102006029392 A1 DE 102006029392A1 DE 200610029392 DE200610029392 DE 200610029392 DE 102006029392 A DE102006029392 A DE 102006029392A DE 102006029392 A1 DE102006029392 A1 DE 102006029392A1
- Authority
- DE
- Germany
- Prior art keywords
- nozzle needle
- needle
- injector
- control
- control room
- 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- Withdrawn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
- 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
- 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
- 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
-
- 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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/001—Control chambers formed by movable sleeves
-
- 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
-
- 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
Abstract
Die Erfindung betrifft einen Injektor (1) einer Kraftstoffeinspritzanlage für eine Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, mit einem Injektorkörper (2), der wenigstens ein Spritzloch (5) aufweist und in dem ein Zuführpfad (7) zur Versorgung des wenigstens einen Spritzlochs (5) mit unter Einspritzdruck stehendem Kraftstoff ausgebildet ist, mit einer im Injektorkörper (2) hubverstellbar gelagerten Düsennadel (9), die eine Nadelspitze (11) zum Steuern einer Einspritzung von Kraftstoff durch das wenigstens eine Spritzloch (5) aufweist, und mit einer Steuereinrichtung (13) zum Steuern des Drucks in einem Steuerraum (38). Die Düsennadel (9) weist eine den Steuerraum (38) axial begrenzende Steuerfläche (17) auf, an der im Betrieb des Injektors (1) in Schließrichtung der Düsennadel (9) wirkende hydraulische Kräfte angreifen, derart, dass ein Druckabfall im Steuerraum (38) die Düsennadel (9) zum Öffnen ansteuert. Erfindungsgemäß weist die Düsennadel (9) zumindest einen Gelenkabschnitt (19) auf, in dem die Düsennadel (9) im Vergleich zu benachbarten Abschnitten bezüglich quer zur Längsmittelachse (10) der Düsennadel (9) orientierten Biegebelastungen biegeweicher ist.The invention relates to an injector (1) of a fuel injection system for an internal combustion engine, in particular in a motor vehicle, having an injector body (2) which has at least one spray hole (5) and in which a feed path (7) for supplying the at least one spray hole (5 ) is formed with standing under injection pressure fuel with a injector in the body (2) adjustable stroke mounted nozzle needle (9) having a needle tip (11) for controlling an injection of fuel through the at least one injection hole (5), and with a control device ( 13) for controlling the pressure in a control room (38). The nozzle needle (9) has a control area (38) axially delimiting control surface (17) on which act in the operation of the injector (1) in the closing direction of the nozzle needle (9) acting hydraulic forces, such that a pressure drop in the control chamber (38 ) drives the nozzle needle (9) to open. According to the invention, the nozzle needle (9) has at least one joint section (19) in which the nozzle needle (9) is more flexible compared to adjacent sections with respect to bending loads oriented transversely to the longitudinal central axis (10) of the nozzle needle (9).
Description
Stand der TechnikState of the art
Die vorliegende Erfindung betrifft einen Injektor einer Kraftstoffeinspritzanlage für eine Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The The present invention relates to an injector of a fuel injection system for one Internal combustion engine, in particular in a motor vehicle, with the Features of the preamble of claim 1.
Aus
der
Mit fortschreitender Entwicklung der Einspritztechnik geht auch eine Erhöhung der gewünschten Einspritzdrücke einher. Herkömmliche Injektoren mit Leckagestellen sind dann nicht mehr geeignet, da die Leckagemengen mit zunehmendem Druck immer größer werden.With progressive development of injection technology is also one increase the desired Injection pressures associated. conventional Injectors with leaks are then no longer suitable since the leakage quantities increase with increasing pressure.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Injektor mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, dass die Düsennadel vergleichsweise lang gebaut werden kann, ohne dass dabei grundsätzlich die Gefahr von Leckagestellen auftritt. Erreicht wird dies mit Hilfe wenigstens eines Gelenkabschnitts innerhalb der Düsennadel, wodurch die Düsennadel in besagtem Gelenkabschnitt im Hinblick auf Biegebelastungen, die quer zur Längsmittelachse der Düsennadel orientiert sind, biegeweicher als daran angrenzende Abschnitte der Düsennadel ausgestaltet ist. Durch die so vergrößerte Biegbarkeit bzw. Flexibilität der Düsennadel im jeweiligen Gelenkabschnitt können Querbelastungen in der Düsennadel im Bereich von Axialführungen reduziert werden. Insbesondere lassen sich dadurch Lagetoleranzen zwischen der Düsennadel und ihrer jeweiligen Axialführung ausgleichen, um dadurch Querbelastungen und Verschleiß zu reduzieren.Of the Inventive injector with the features of claim 1 has the advantage that the nozzle needle can be built comparatively long, without that basically the Danger of leakage occurs. This is achieved with help at least one hinge portion within the nozzle needle, causing the nozzle needle in said joint portion with respect to bending loads, the transverse to the longitudinal central axis the nozzle needle are oriented, flexurally as adjacent to the sections of the nozzle needle is designed. Due to the so enlarged flexibility or flexibility of the nozzle needle in each joint section can Cross loads in the nozzle needle in the range of axial guides be reduced. In particular, this allows positional tolerances between the nozzle needle and their respective axial guidance compensate, thereby reducing lateral loads and wear.
Bei einer vorteilhaften Weiterbildung kann wenigstens einer der Gelenkabschnitte zumindest einen geradlinigen Steg aufweisen, wobei der Steg sich bezüglich einer Längsmittelachse der Düsennadel radial erstreckt und wobei der Steg axial benachbarte Axialabschnitte der Düsennadel miteinander verbindet. Mit Hilfe eines derartigen Stegs wird im Gelenkabschnitt die Biegbarkeit bzw. Flexibilität der Düsennadel um eine durch die Längsrichtung des Stegs definierte Biegeachse stark vergrößert. Vorteilhaft ist eine Weiterbildung, bei welcher der jeweilige Gelenkabschnitt zumindest zwei solche Stege aufweist, die axial zueinander beabstandet und um die Längsmittelachse der Düsennadel um 90° zueinander versetzt angeordnet sind. Hierdurch wird die Flexibilität der Düsennadel im Bereich des Gelenkabschnitts um zwei senkrecht zueinander verlaufende Achsen erhöht, wodurch sich eine Art kardanische Beweglichkeit der über den Gelenkabschnitt miteinander verbundenen Abschnitte der Düsennadel ergibt.at an advantageous development, at least one of the joint sections have at least one rectilinear web, wherein the web is in terms of a longitudinal central axis the nozzle needle extends radially and wherein the web axially adjacent axial sections the nozzle needle connects with each other. With the help of such a bridge is in the joint section the bendability or flexibility the nozzle needle one by the longitudinal direction the web defined bending axis greatly increased. An advantage is one Training in which the respective joint portion at least has two such webs, the axially spaced from each other and around the longitudinal central axis the nozzle needle around 90 ° to each other are arranged offset. This will increase the flexibility of the nozzle needle in the region of the joint section about two mutually perpendicular axes elevated, which creates a kind of gimbal mobility over the Joint portion interconnected portions of the nozzle needle results.
Grundsätzlich kann die Düsennadel einteilig und aus einem Stück hergestellt werden, wodurch sich Toleranzketten reduzieren lassen. Ebenso ist es möglich, die Düsennadel aus mehreren Komponenten zusammenzubauen, die zumindest in axialer Richtung fest miteinander verbunden sind. In jedem Fall kann die Düsennadel leckagefrei ausgestaltet werden, wodurch sie für daran angreifenden Drücke quasi unempfindlich ist. Desweiteren ermöglicht eine leckagefreie Bauweise der Düsennadel die Unterbringung der Düsennadel in einem Nadelraum, durch den der Zuführpfad hindurchgeführt ist. Hierdurch ist die Düsennadel in dem unter Hochdruck stehenden Kraftstoffangeordnet, was die Kraftstoffführung innerhalb des Injektors erheblich vereinfacht.Basically the nozzle needle in one piece and in one piece can be produced, which can reduce tolerance chains. It is also possible the nozzle needle to assemble from several components, at least in the axial direction are firmly connected. In any case, the nozzle needle be designed leak-free, so they quasi for attacking pressures insensitive. Furthermore allows a leak-free construction the nozzle needle the accommodation of the nozzle needle in a needle space through which the feed path is passed. This is the nozzle needle placed in the high-pressure fuel, resulting in the fuel guide within the injector considerably simplified.
Weitere wichtige Merkmale und Vorteile des erfindungsgemäßen Injektors ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Further important features and advantages of the injector according to the invention arise from the dependent claims, from the drawings and from the associated description of the figures the drawings.
Zeichnungendrawings
Ausführungsbeispiele des erfindungsgemäßen Injektors sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Komponenten beziehen. Es zeigen, jeweils schematisch,Embodiments of the injector according to the invention are illustrated in the drawings and are explained in more detail below, wherein like reference numerals refer to the same or similar or functionally identical components. It show, in each case schematically,
Beschreibung der AusführungsbeispieleDescription of the embodiments
Entsprechend
den
Diese
bildet ebenso wie der Injektor
Der
Injektor
Der
Injektor
Die
Düsennadel
Die
Düsennadel
Bei
den in den
Bei
den Ausführungsformen
der
Bei
der in
Bei
der in
Bei
den Ausführungsformen
der
Bei
den hier gezeigten Ausführungsformen ist
die Steuereinrichtung
Zum Öffnen der
Düsennadel
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610029392 DE102006029392A1 (en) | 2006-06-27 | 2006-06-27 | injector |
EP07107391A EP1873393A1 (en) | 2006-06-27 | 2007-05-03 | Injector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610029392 DE102006029392A1 (en) | 2006-06-27 | 2006-06-27 | injector |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006029392A1 true DE102006029392A1 (en) | 2008-01-03 |
Family
ID=38543771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200610029392 Withdrawn DE102006029392A1 (en) | 2006-06-27 | 2006-06-27 | injector |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1873393A1 (en) |
DE (1) | DE102006029392A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007011685A1 (en) * | 2007-03-09 | 2008-09-11 | Robert Bosch Gmbh | Fuel injector with improved control valve |
DE102008001423A1 (en) * | 2008-04-28 | 2009-10-29 | Robert Bosch Gmbh | Fuel injection system |
DE102009028993A1 (en) * | 2009-08-28 | 2011-03-03 | Robert Bosch Gmbh | fuel injector |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19919432C2 (en) | 1999-04-29 | 2002-07-04 | Bosch Gmbh Robert | Common rail injector |
DE19936668A1 (en) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common rail injector |
DE19946766C2 (en) * | 1999-09-29 | 2001-07-26 | Siemens Ag | Injector for an internal combustion engine with direct injection |
DE10260724A1 (en) * | 2002-12-23 | 2004-07-01 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
JP2006257874A (en) * | 2004-04-30 | 2006-09-28 | Denso Corp | Injector |
DE102004026172A1 (en) * | 2004-05-28 | 2005-12-22 | Siemens Ag | Injection valve and method for producing an injection valve |
US7891584B2 (en) * | 2005-04-14 | 2011-02-22 | Ganser-Hydromag Ag | Fuel injection valve |
-
2006
- 2006-06-27 DE DE200610029392 patent/DE102006029392A1/en not_active Withdrawn
-
2007
- 2007-05-03 EP EP07107391A patent/EP1873393A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP1873393A1 (en) | 2008-01-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1989436B1 (en) | Fuel injection device for an internal combustion engine | |
EP1763628B1 (en) | Injector | |
EP2108080A1 (en) | Injector for injecting fuel into combustion chambers of internal combustion engines | |
EP1853813A1 (en) | Injection nozzle | |
EP2294309B1 (en) | Fuel injector | |
EP1640604A1 (en) | Servo valve and injection valve | |
EP2032835B1 (en) | Fuel injector | |
DE102008035087B4 (en) | Injector | |
DE10353045A1 (en) | Fuel injection valve | |
DE102006029392A1 (en) | injector | |
EP1682769A1 (en) | Fuel injector with a multipart, directly controlled injection valve element | |
DE102006029393A1 (en) | Fuel injection system`s injector for internal combustion engine in motor vehicle, has nozzle needle comprising needle unit and piston body that are firmly connected with each other by connecting unit overlapping contact zone | |
DE102006029394A1 (en) | Injector for fuel injection system of internal combustion engine in motor vehicle, has nozzle needle with needle body and piston body lying together axially in contact zone, where contact zone is sealed opposite to high pressure chamber | |
EP1637727B1 (en) | Control valve for an injector | |
EP2439398B1 (en) | Fuel injector valve | |
DE102006050033A1 (en) | Injector, in particular common rail injector | |
EP2226490B1 (en) | Fuel injector | |
DE102006035982A1 (en) | Injector for fuel injection system of internal-combustion engine, has piezo-electric actuator formed as pipe and radially limiting coupling space in its interior in area of its actuator bases | |
DE102007034034A1 (en) | injector | |
EP2905458A1 (en) | Nozzle assembly for a fuel injector and fuel injector | |
WO2018153596A1 (en) | Fuel injection valve for injecting a gaseous and/or liquid fuel | |
DE102006028918A1 (en) | Fuel injection device for an internal combustion engine | |
DE102005045892A1 (en) | Directly driven fuel injector, comprises outwards opening jet needle moved by piezoelectric multi-layer device | |
DE102008002470A1 (en) | Fuel injector for internal combustion engine of motor vehicle, has injecting valve provided with control rod part and needle part that are material-conclusively connected with each other at contact areas by plastic extrusion coat | |
EP2084390A1 (en) | Injector with an axial pressure-compensating control valve |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |