DE102006029394A1 - 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 - Google Patents
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 Download PDFInfo
- Publication number
- DE102006029394A1 DE102006029394A1 DE200610029394 DE102006029394A DE102006029394A1 DE 102006029394 A1 DE102006029394 A1 DE 102006029394A1 DE 200610029394 DE200610029394 DE 200610029394 DE 102006029394 A DE102006029394 A DE 102006029394A DE 102006029394 A1 DE102006029394 A1 DE 102006029394A1
- Authority
- DE
- Germany
- Prior art keywords
- needle
- piston body
- contact zone
- injector
- nozzle needle
- 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- Withdrawn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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Abstract
Description
Stand der TechnikState of the art
Die Erfindung betrifft einen Injektor für eine Kraftstoffeinspritzanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug.The The invention relates to an injector for a fuel injection system an internal combustion engine, in particular in a motor vehicle.
Ein derartiger Injektor weist üblicherweise eine Düsennadel zum Steuern der Einspritzung von Kraftstoff durch wenigstens ein Spritzloch auf, wobei die Düsennadel in einem Injektorkörper hubverstellbar gelagert ist. Bei bestimmten Bauformen kann sich die Düsennadel zumindest teilweise in einem Hochdruckraum des Injektorkörpers erstrecken, durch den ein das wenigstens eine Spritzloch mit unter Einspritzdruck stehendem Kraftstoff versorgender Zuführpfad hindurchgeführt ist. Die Düsennadel bzw. ein die Düsennadel umfassender Nadelverband weist üblicherweise eine Steuerfläche auf, die einen Steuerraum begrenzt. Durch eine Druckabsenkung im Steuerraum kann die Düsennadel zum Öffnen angesteuert werden. Die Druckabsenkung im Steuerraum kann beispielsweise mit Hilfe eines Piezoaktors oder mit Hilfe eines Steuerventils realisiert werden.One such injector usually has one nozzle needle for controlling the injection of fuel through at least one Spray hole on, with the nozzle needle in an injector body is mounted adjustable in stroke. In certain designs, the nozzle needle extend at least partially in a high pressure space of the injector body, through the one at least one injection hole with under injection pressure passing fuel supply supply path is passed. The nozzle needle or a nozzle needle Comprehensive needle bandage usually shows a control surface which limits a control room. By lowering the pressure in the Control room can be the nozzle needle to open be controlled. The pressure reduction in the control room, for example realized with the help of a piezoelectric actuator or by means of a control valve become.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Injektor mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, dass er vergleichsweise preiswert herstellbar ist. Gleichzeitig zeichnet sich der Injektor durch vergleichsweise geringe Leckagemengen aus. Dies ist dann von Vorteil, wenn aus Kostengründen zur Drucksteuerung im Steuerraum anstelle eines Piezoaktors ein Steuerventil verwendet werden soll und wenn vergleichsweise hohe Einspritzdrücke realisiert werden sollen. Beim erfindungsgemäßen Injektor werden diese Ziele dadurch erreicht, dass die Düsennadel zumindest aus zwei Nadelbauteilen, nämlich zumindest aus einem Nadelkörper und aus einem Kolbenkörper zusammengesetzt ist, wobei der Nadelkörper das wenigstens eine Spritzloch steuert, während der Kolbenkörper die Steuerfläche aufweist. Nadelkörper und Kolbenkörper sind jeweils aus einem Stück hergestellt. Je zwei Nadelbauteile liegen in einer Kontaktzone, die im Hochdruckraum angeordnet ist, axial aneinander an. Gleichzeitig ist besagte Kontaktzone gegenüber dem Hochdruckraum versiegelt. Die Versiegelung bewirkt, dass der unter Hochdruck stehende Kraftstoff nicht in die Kontaktzone, also nicht axial zwischen die Nadelbauteile eindringen kann. Durch diese Versiegelung ist es möglich, die durch den Hochdruckraum hindurchgeführte Düsennadel zwei- oder mehrteilig auszugestalten. Bei einem Injektor, bei dem der Druck im Steuerraum mit Hilfe eines daran angeordneten Steuerventils gesteuert wird, besitzt die Düsennadel eine vergleichsweise große axiale Länge. Eine lange einteilige Nadel ist jedoch problematisch zu fertigen. Bei einem zwei- oder mehrteiligen Aufbau können bekannte Fertigungstechniken für die Einzelteile verwendet werden.Of the Inventive injector with the features of claim 1 has the advantage that it comparatively is inexpensive to produce. At the same time, the injector stands out by comparatively small leakage quantities. This is an advantage if for cost reasons for pressure control in the control room instead of a piezoelectric actuator Control valve should be used and if comparatively high Injection pressures to be realized. In the injector according to the invention, these goals achieved by the nozzle needle at least two needle components, namely at least one needle body and from a piston body is composed, wherein the needle body, the at least one injection hole controls while the piston body the control surface having. needle body and piston body are each in one piece produced. Two needle components each lie in a contact zone, which is arranged in the high-pressure chamber, axially against each other. simultaneously is opposite said contact zone the high pressure chamber sealed. The seal causes the High-pressure fuel is not in the contact zone, ie can not penetrate axially between the needle components. Through this Sealing it is possible the guided through the high-pressure chamber nozzle needle two or more parts embody. In an injector, where the pressure in the control room with Help a control valve arranged thereon is controlled owns the nozzle needle a comparatively large one axial length. However, a long one-piece needle is problematic to manufacture. In a two- or multi-part construction known manufacturing techniques for the Items are used.
Die Versiegelung der Kontaktzone gegenüber dem Kraftstoff im Hochdruckraum lässt sich beispielsweise dadurch realisieren, dass die jeweiligen Nadelbauteile, z.B. der Nadelkörper und der Kolbenkörper, in der Kontaktzone verklebt sind. Durch diese Verklebung kann kein Kraftstoff in die Kontaktzone eindringen. Alternativ oder kumulativ kann die Versiegelung der Kontaktzone auch dadurch erreicht werden, dass eine die Kontaktzone in Umfangsrichtung vollständig umschließende Schutzhülle an der Düsennadel angebracht wird. Auch eine derartige Schutzhülle verhindert das Eindringen von Kraftstoff in die Kontaktzone.The Sealing of the contact zone with respect to the fuel in the high-pressure chamber let yourself For example, realize that the respective needle components, e.g. the needle body and the piston body, are glued in the contact zone. By this bonding can not Fuel penetrate into the contact zone. Alternative or cumulative the sealing of the contact zone can also be achieved by that a contact zone in the circumferential direction completely enclosing protective cover on the nozzle needle is attached. Even such a protective cover prevents the penetration from fuel to the contact zone.
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 shown in the drawings and are explained in more detail below, wherein the same reference numerals to the same or similar or functionally identical Refer to components. Show, in each case schematically,
Beschreibung der AusführungsbeispieleDescription of the embodiments
Entsprechend
den
Der
Injektor
Die
Düsennadel
Die
Düsennadel
Die
Versiegelung
Bei
der in
Bei
der in
Bei
den in den
Bei
der in
Bei
der in
Bei
den hier gezeigten, bevorzugten Ausführungsformen ist die Düsennadel
Bei
der in
Die
in den
Im gezeigten Ausgangszustand sind die Steuerventile
In the initial state shown are the control valves
Um
eine Kraftstoffeinspritzung durchzuführen, wird das jeweilige Steuerventil
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610029394 DE102006029394A1 (en) | 2006-06-27 | 2006-06-27 | 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 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610029394 DE102006029394A1 (en) | 2006-06-27 | 2006-06-27 | 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 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006029394A1 true DE102006029394A1 (en) | 2008-01-03 |
Family
ID=38776784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200610029394 Withdrawn DE102006029394A1 (en) | 2006-06-27 | 2006-06-27 | 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 |
Country Status (1)
Country | Link |
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DE (1) | DE102006029394A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008040645A1 (en) | 2008-07-23 | 2010-01-28 | Robert Bosch Gmbh | Fuel i.e. diesel, injector for use in combustion chamber of diesel injection device of internal-combustion engine, has control area connected with high pressure chamber via inlet channel guided by combustion chamber-far end of nozzle needle |
WO2010018024A1 (en) * | 2008-08-11 | 2010-02-18 | Robert Bosch Gmbh | Injection valve member |
DE102008042789A1 (en) | 2008-10-13 | 2010-04-29 | Robert Bosch Gmbh | Fuel injector e.g. in-line fuel injector, for fuel injection system of internal-combustion engine of motor vehicle, has injection valve designed as split injection valve whose parts are joined with each other at side joint |
DE102009001325A1 (en) | 2009-03-04 | 2010-09-09 | Robert Bosch Gmbh | Long nozzle needle for fuel injector of common rail injection system of motor vehicle, has valve piston part and nozzle needle part that limit hollow area within hollow cylinder that accommodates medium for damping vibration |
-
2006
- 2006-06-27 DE DE200610029394 patent/DE102006029394A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008040645A1 (en) | 2008-07-23 | 2010-01-28 | Robert Bosch Gmbh | Fuel i.e. diesel, injector for use in combustion chamber of diesel injection device of internal-combustion engine, has control area connected with high pressure chamber via inlet channel guided by combustion chamber-far end of nozzle needle |
WO2010018024A1 (en) * | 2008-08-11 | 2010-02-18 | Robert Bosch Gmbh | Injection valve member |
CN102105674A (en) * | 2008-08-11 | 2011-06-22 | 罗伯特·博世有限公司 | Injection valve member |
CN102105674B (en) * | 2008-08-11 | 2015-10-21 | 罗伯特·博世有限公司 | Injection valve member |
DE102008042789A1 (en) | 2008-10-13 | 2010-04-29 | Robert Bosch Gmbh | Fuel injector e.g. in-line fuel injector, for fuel injection system of internal-combustion engine of motor vehicle, has injection valve designed as split injection valve whose parts are joined with each other at side joint |
DE102009001325A1 (en) | 2009-03-04 | 2010-09-09 | Robert Bosch Gmbh | Long nozzle needle for fuel injector of common rail injection system of motor vehicle, has valve piston part and nozzle needle part that limit hollow area within hollow cylinder that accommodates medium for damping vibration |
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8139 | Disposal/non-payment of the annual fee |