DE102008040645A1 - 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 - Google Patents
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 Download PDFInfo
- Publication number
- DE102008040645A1 DE102008040645A1 DE200810040645 DE102008040645A DE102008040645A1 DE 102008040645 A1 DE102008040645 A1 DE 102008040645A1 DE 200810040645 DE200810040645 DE 200810040645 DE 102008040645 A DE102008040645 A DE 102008040645A DE 102008040645 A1 DE102008040645 A1 DE 102008040645A1
- Authority
- DE
- Germany
- Prior art keywords
- nozzle needle
- fuel
- control
- combustion chamber
- chamber
- 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- Withdrawn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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
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- 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 betrifft einen Kraftstoffinjektor zum Einspritzen von Kraftstoff in einen Brennraum einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The The invention relates to a fuel injector for injecting Fuel in a combustion chamber of an internal combustion engine after the Preamble of claim 1.
Stand der TechnikState of the art
Ein
derartiger Kraftstoffinjektor ist aus
Der Erfindung liegt die Aufgabe zugrunde, eine einfachere Realisierung für die Zulaufleitung zum Steuerraum zu schaffen.Of the Invention is based on the object, a simpler implementation to provide for the supply line to the control room.
Offenbarung der ErfindungDisclosure of the invention
Die Aufgabe der Erfindung wird mit den kennzeichnenden Maßnahmen des Anspruchs 1 gelöst.The The object of the invention is with the characterizing measures of claim 1.
Durch die Verlegung der Zulaufleitung mit der Zulaufdrossel durch den Düsennadelkolben der Düsennadel ist es möglich, dass der Steuerraum an der zur Ablaufdrossel gegenüberliegenden Seite befüllt wird, wodurch die hydraulische Dichtheit des Steuerraums, insbesondere bei einer Begrenzung mit einer Steuerraumhülse verbessert wird. Durch das geringe Volumen des Steuerraums steht nur eine geringe Ringfläche für die Steuerraumhülse zur Verfügung, die den Steuerraum radial begrenzt und durch die die Zulaufdrossel geführt werden müsste. Folglich steht für die Herstellung des Zulaufkanals eine wesentlich größere Materialfläche zur Verfügung, als das bei einer Zulaufbohrung gegeben wäre, die durch die Steuerraumhülse geführt wird.By the laying of the supply line with the inlet throttle through the Nozzle needle piston of the nozzle needle it is possible that the control chamber at the opposite to the outlet throttle Side is filled, reducing the hydraulic tightness the control chamber, in particular in a limitation with a control chamber sleeve is improved. Due to the small volume of the control room is only a small annular area for the control chamber sleeve available, which limits the control room radially and through the inlet throttle would have to be guided. consequently is essential for the production of the inlet channel larger material surface available, as that would be given at a Zulaufbohrung, by the control chamber sleeve is guided.
Vorteilhafte Weiterbildungen der Erfindung sind durch die Maßnahmen der Unteransprüche möglich.advantageous Further developments of the invention are by the measures the dependent claims possible.
Besonders vorteilhaft ist es, wenn der Zulaufkanal durch einen axial durch die Düsennadel geführten Zulaufabschnitt und durch einen dazu winklig verlaufenden Zulaufabschnitt gebildet ist, wobei der winklig verlaufende Zulaufabschnitt in den Hochdruckraum mündet. Zweckmäßigerweise enthält der winklig verlaufende Zulaufabschnitt die Zulaufdrossel.Especially It is advantageous if the inlet channel by an axially through the nozzle needle guided inlet section and through an inlet section extending at an angle is formed, wherein the angled inflow section opens into the high-pressure chamber. Conveniently, the angle contains extending inlet section the inlet throttle.
Vorteilhaft ist ferner, wenn der winklig verlaufende Zulaufabschnitt in einen an der Düsennadel ausgebildeten Ringspalt mündet, wobei der Ringspalt unterhalb der Steuerraumhülse an der Düsennadel angeordnet ist.Advantageous is further, when the angled inflow section in a opens at the nozzle needle formed annular gap, the annular gap below the control chamber sleeve on the Nozzle needle is arranged.
Die axiale Erstreckung des axial verlaufende Zulaufabschnitt reicht dabei mindestens bis zum Ende der Steuerraumhülse.The axial extension of the axially extending inlet section extends at least until the end of the control chamber sleeve.
Vorteilhaft lässt sich die Anordnung des Zulaufkanals bei einem Kraftstoffinjektor einsetzten, dessen Steuerraum von einer Steuerraumhülse radial begrenzt ist, die unter Dichtwirkung an dem brennraumfernen Ende der Düsennadel verschiebbar an der Düsennadel geführt ist und die mit Hilfe einer Druckfeder in Anlage gegen ein Ventilstück gehalten ist. Dadurch lässt sich das Ventilstück zweiteilig ausführen. Zusätzlich kann in der Steuerraumhülse eine Bohrung angeordnet sein, die eine weitere hydraulische Verbindung zwischen Hochdruckraum und Steuerraum realisiert, so dass die Bohrung als weiterer Zulaufkanal fungiert.Advantageous can the arrangement of the inlet channel at a fuel injector inserted, the control room of a control chamber sleeve is radially limited, which under sealing effect on the combustion chamber distant End of the nozzle needle displaceable on the nozzle needle is guided and the by means of a compression spring in plant held against a valve piece. By doing so leaves to execute the valve piece in two parts. additionally can be arranged in the control chamber sleeve a bore the one more hydraulic connection between high-pressure chamber and control room realized, so that the bore as another inlet channel acts.
Ausführungsbeispielembodiment
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.One Embodiment of the invention is in the drawing shown and in the following description in more detail explained.
Die Zeichnung zeigt einen Teilschnitt durch einen Kraftstoffinjektor.The Drawing shows a partial section through a fuel injector.
Der
Ausschnitt des dargestellten Kraftstoffinjektors umfasst einen Injektorkörper
An
der Düsennadel
Der
Kraftstoffinjektor umfasst weiterhin ein Steuerventil
Durch
das Ventilstück
Die
Steuerraumhülse
Zum
Befüllen des Steuerraums
Es
ist ebenfalls denkbar, den Zulaufkanal
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102006029394 A1 [0002] DE 102006029394 A1 [0002]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810040645 DE102008040645A1 (en) | 2008-07-23 | 2008-07-23 | 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 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810040645 DE102008040645A1 (en) | 2008-07-23 | 2008-07-23 | 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 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008040645A1 true DE102008040645A1 (en) | 2010-01-28 |
Family
ID=41428807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810040645 Withdrawn DE102008040645A1 (en) | 2008-07-23 | 2008-07-23 | 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 |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008040645A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU177012U1 (en) * | 2017-10-03 | 2018-02-06 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" | Sprayer for the electro-hydraulic nozzle of the battery system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006029394A1 (en) | 2006-06-27 | 2008-01-03 | Robert Bosch Gmbh | 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 |
-
2008
- 2008-07-23 DE DE200810040645 patent/DE102008040645A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006029394A1 (en) | 2006-06-27 | 2008-01-03 | Robert Bosch Gmbh | 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 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU177012U1 (en) * | 2017-10-03 | 2018-02-06 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" | Sprayer for the electro-hydraulic nozzle of the battery system |
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Legal Events
Date | Code | Title | Description |
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R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |