DE102012210265A1 - Fuel injector for injecting fuel into combustion chamber of internal combustion engine of motor car, has nozzle needle opening or closing passage opening in valve housing, and indirectly actuatable by chemical actuator i.e. osmotic actuator - Google Patents
Fuel injector for injecting fuel into combustion chamber of internal combustion engine of motor car, has nozzle needle opening or closing passage opening in valve housing, and indirectly actuatable by chemical actuator i.e. osmotic actuator Download PDFInfo
- Publication number
- DE102012210265A1 DE102012210265A1 DE201210210265 DE102012210265A DE102012210265A1 DE 102012210265 A1 DE102012210265 A1 DE 102012210265A1 DE 201210210265 DE201210210265 DE 201210210265 DE 102012210265 A DE102012210265 A DE 102012210265A DE 102012210265 A1 DE102012210265 A1 DE 102012210265A1
- Authority
- DE
- Germany
- Prior art keywords
- actuator
- valve
- fuel injector
- fuel
- 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- Withdrawn
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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
- 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
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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
- 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
- F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms
-
- 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
- F02M63/0059—Arrangements of valve actuators
-
- 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
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
-
- 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
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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
Stand der TechnikState of the art
Die Erfindung betrifft einen Kraftstoffinjektor nach dem Oberbegriff des Anspruchs 1.The invention relates to a fuel injector according to the preamble of
Ein derartiger Kraftstoffinjektor ist aus der Praxis bereits bekannt und weist ein Ventilelement auf, das zum Öffnen oder Verschließen eines Durchgangs zwischen einem Ventilsteuerraum und einem Kraftstoffrücklauf in einem Injektorgehäuse dient. Hierbei befindet sich in dem Ventilsteuerraum unter hohem Druck stehender Kraftstoff. In den Ventilsteuerraum taucht auf der dem Ventilschließglied abgewandten Seite ein Ende einer Düsennadel ein, deren Bewegung über den Druck in dem Ventilsteuerraum bzw. den Abfluss von Kraftstoff aus dem Ventilsteuerraum steuerbar ist. Das Ventilelement ist mit einem Aktuator wirkverbunden angeordnet, wobei der Aktuator insbesondere als Magnetaktuator oder als Piezoaktuator ausgebildet ist.Such a fuel injector is already known from practice and has a valve element which serves to open or close a passage between a valve control chamber and a fuel return in an injector. This is located in the valve control room under high pressure fuel. In the valve control chamber on the side facing away from the valve closure member one end of a nozzle needle, the movement of which is controllable via the pressure in the valve control chamber or the outflow of fuel from the valve control chamber. The valve element is arranged operatively connected to an actuator, wherein the actuator is designed in particular as a magnetic actuator or as a piezoelectric actuator.
Aus der
Offenbarung der ErfindungDisclosure of the invention
Ausgehend von dem dargestellten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Kraftstoffinjektor nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, dass ein alternatives Funktionsprinzip für den aus dem Stand der Technik bekannten Magnet- bzw. Piezoaktuator zur zumindest mittelbaren Bewegung einer Düsennadel ermöglicht wird. Diese Aufgabe wird erfindungsgemäß bei einem Kraftstoffinjektor mit den Merkmalen des Anspruchs 1 dadurch gelöst, dass der Aktuator als chemischer Aktuator, insbesondere als osmotischer Aktuator ausgebildet ist.Based on the illustrated prior art, the invention has the object, a fuel injector according to the preamble of
Vorteilhafte Weiterbildungen des erfindungsgemäßen Kraftstoffinjektors sind in den Unteransprüchen aufgeführt. In den Rahmen der Erfindung fallen sämtliche Kombinationen aus zumindest zwei von in den Ansprüche, der Beschreibung und/oder den Figuren offenbarten Merkmalen.Advantageous developments of the fuel injector according to the invention are listed in the subclaims. All combinations of at least two features disclosed in the claims, the description and / or the figures fall within the scope of the invention.
In konstruktiv bevorzugter Ausgestaltung des Kraftstoffinjektors wird vorgeschlagen, dass der Aktuator mit einem Ventilelement verbunden ist, das einen Kraftstofffluss von einem Ventilraum zu einem Kraftstoffrücklaufanschluß steuert.In a structurally preferred embodiment of the fuel injector is proposed that the actuator is connected to a valve element which controls a flow of fuel from a valve chamber to a fuel return port.
Um den Aktuator mechanisch relativ einfach aufbauen zu können, wird vorgeschlagen, dass der Aktuator in einem Niederdruckbereich des Injektorgehäuses angeordnet ist. Dadurch werden die üblicherweise in dem Hochdruckraum des Injektorgehäuses herrschenden Drücke im Bereich zwischen einigen zig bar bis über 2000bar nicht auf den Aktuator bzw. dessen Konstruktion übertragen, so dass dessen Bauteile nicht auf einen derart hohen Druck ausgelegt sein müssen.In order to be able to construct the actuator mechanically relatively simply, it is proposed that the actuator is arranged in a low-pressure region of the injector housing. As a result, the pressures usually prevailing in the high-pressure chamber of the injector housing in the range between a few tens of bars to over 2000 bars are not transmitted to the actuator or its construction, so that its components do not have to be designed for such a high pressure.
Um zu verhindern, dass die in dem chemischen Aktuator befindliche Substanz in Kontakt mit dem Kraftstoff im Niederdruckbereich gelangt, wird darüber hinaus vorgeschlagen, dass der Aktuator in einem separaten Gehäuseelement innerhalb des Niederdruckbereichs aufgenommen ist, das gegenüber dem Niederdruckbereich abgedichtet ist.In order to prevent the substance located in the chemical actuator coming into contact with the fuel in the low-pressure region, it is furthermore proposed that the actuator be accommodated in a separate housing element within the low-pressure region, which is sealed off from the low-pressure region.
Eine definierte Führung des Ventilelements, bei dem der Aktuator keine zusätzlichen Elemente zur Führung des Ventilelements benötigt, wird erzielt, wenn das Ventilelement in dem Ventilgehäuse in einem Abschnitt des Ventilgehäuses axial beweglich geführt ist.A defined guidance of the valve element, in which the actuator does not require any additional elements for guiding the valve element, is achieved when the valve element is guided axially movably in the valve housing in a section of the valve housing.
In konstruktiv vorteilhafter Ausgestaltung des Ventilelements wird vorgeschlagen, dass das Ventilelement zwei mit einer Ventilstange verbundene Elemente aufweist, wobei das erste Element in einen mit einem chemischen Element befüllten Raum des Aktuators eintaucht, und wobei das zweite Element ein Schließelement für einen Durchgang zum Ventilraum ausbildet.In a structurally advantageous embodiment of the valve element is proposed that the valve element comprises two elements connected to a valve rod, wherein the first element is immersed in a filled with a chemical element space of the actuator, and wherein the second element forms a closing element for passage to the valve chamber.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung.Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing.
Diese zeigt in:This shows in:
Gleiche Elemente bzw. Elemente mit gleicher Funktion sind in den Figuren mit den gleichen Bezugsziffern versehen.The same elements or elements with the same function are provided in the figures with the same reference numerals.
In der
Axial oberhalb des Düsenkörpers
Auf der dem Düsenkörper
Innerhalb des Niederdruckbereichs
Das Ventilelement
Das zweite kolbenartige Element
Beim Anlegen des Minuspols der Gleichspannungsquelle
When applying the negative pole of the
Der soweit beschriebene Kraftstoffinjektor
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES 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 of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- EP 1050338 A2 [0003] EP 1050338 A2 [0003]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210210265 DE102012210265A1 (en) | 2012-06-19 | 2012-06-19 | Fuel injector for injecting fuel into combustion chamber of internal combustion engine of motor car, has nozzle needle opening or closing passage opening in valve housing, and indirectly actuatable by chemical actuator i.e. osmotic actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210210265 DE102012210265A1 (en) | 2012-06-19 | 2012-06-19 | Fuel injector for injecting fuel into combustion chamber of internal combustion engine of motor car, has nozzle needle opening or closing passage opening in valve housing, and indirectly actuatable by chemical actuator i.e. osmotic actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012210265A1 true DE102012210265A1 (en) | 2013-12-19 |
Family
ID=49668033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210210265 Withdrawn DE102012210265A1 (en) | 2012-06-19 | 2012-06-19 | Fuel injector for injecting fuel into combustion chamber of internal combustion engine of motor car, has nozzle needle opening or closing passage opening in valve housing, and indirectly actuatable by chemical actuator i.e. osmotic actuator |
Country Status (1)
Country | Link |
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DE (1) | DE102012210265A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1050338A2 (en) | 1999-05-06 | 2000-11-08 | DaimlerChrysler AG | Chemical actor |
-
2012
- 2012-06-19 DE DE201210210265 patent/DE102012210265A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1050338A2 (en) | 1999-05-06 | 2000-11-08 | DaimlerChrysler AG | Chemical actor |
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Date | Code | Title | Description |
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R005 | Application deemed withdrawn due to failure to request examination |