DE102009046371A1 - Magnetic valve for fuel injector, comprises armature which is actuated by magnetic coil, where armature is provided as closing unit which controls aperture for fluid, where damping device has damping area - Google Patents
Magnetic valve for fuel injector, comprises armature which is actuated by magnetic coil, where armature is provided as closing unit which controls aperture for fluid, where damping device has damping area Download PDFInfo
- Publication number
- DE102009046371A1 DE102009046371A1 DE200910046371 DE102009046371A DE102009046371A1 DE 102009046371 A1 DE102009046371 A1 DE 102009046371A1 DE 200910046371 DE200910046371 DE 200910046371 DE 102009046371 A DE102009046371 A DE 102009046371A DE 102009046371 A1 DE102009046371 A1 DE 102009046371A1
- Authority
- DE
- Germany
- Prior art keywords
- damping
- armature
- solenoid valve
- guide element
- magnet armature
- 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- Withdrawn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
-
- 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
- F02M63/0014—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
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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
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
Abstract
Description
Stand der TechnikState of the art
Die Erfindung betrifft ein Magnetventil nach dem Oberbegriff des Anspruchs 1.The invention relates to a solenoid valve according to the preamble of claim 1.
Ein derartiges Magnetventil ist bereits durch die nachveröffentlichte
Offenbarung der ErfindungDisclosure of the invention
Ausgehend von dem dargestellten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Magnetventil nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, dass es mit relativ geringem Fertigungsaufwand herstellbar ist und dabei gute Dämpfungseigenschaften aufweist. Diese Aufgabe wird bei einem Magnetventil mit den Merkmalen des Anspruchs 1 gelöst. Der Erfindung liegt dabei die Idee zugrunde, insbesondere durch eine Ausnehmung zwischen dem Führungselement und dem Magnetanker einen Dämpfungsraum auszubilden, der über wenigstens eine Verbindung mit einem Niederdruckbereich des Magnetventils verbunden ist. Dadurch sind keine zusätzlich en, separaten Bauteile erforderlich, sodass sich der fertigungstechnische Aufwand in Grenzen hält. Von besonderem Vorteil ist hier zusätzlich, dass durch die erfindungsgemäße Ausbildung des Dämpfungsraums sich nicht nur die Schließbewegungen des Schließgliedes dämpfen lassen, sondern auch die Öffnungsbewegungen. Dadurch ist der Verschleiß an dem erfindungsgemäßen Magnetventil besonders gering.Based on the illustrated prior art, the invention has the object, a solenoid valve according to the preamble of claim 1 such that it can be produced with relatively little manufacturing effort and has good damping properties. This object is achieved in a solenoid valve having the features of claim 1. The invention is based on the idea, in particular by a recess between the guide element and the armature to form a damping chamber which is connected via at least one connection with a low pressure region of the solenoid valve. As a result, no additional, separate components are required, so that the manufacturing effort is limited. Of particular advantage here is additionally that can be dampen not only the closing movements of the closing member by the inventive design of the damping chamber, but also the opening movements. As a result, the wear on the solenoid valve according to the invention is particularly low.
Vorteilhafte Weiterbildungen des erfindungsgemäßen Magnetventils sind in den Unteransprüchen angegeben.Advantageous developments of the solenoid valve according to the invention are specified in the subclaims.
Besonders bevorzugt ist es, wenn die Verbindung als Durchgangsbohrung in einer Wand des Führungselements ausgebildet ist und die Durchgangsbohrung vorzugsweise als Drosselbohrung ausgebildet ist. Somit lässt sich über die Geometrie, insbesondere über den Durchmesser der Durchgangsbohrung, sowohl der Zufluss des Druckmittels aus dem Niederdruckbereich als auch der Abflussquerschnitt in einfacher Weise beeinflussen, um die Dämpfungseigenschaften in gewünschter Weise zu erzielen.It is particularly preferred if the connection is formed as a through hole in a wall of the guide member and the through hole is preferably formed as a throttle bore. Thus, both the inflow of the pressure medium from the low-pressure region and the outflow cross-section can be influenced in a simple manner via the geometry, in particular via the diameter of the through-bore, in order to achieve the damping properties in the desired manner.
Um den Dämpfungsraum dicht auszubilden, ist es in einer besonders bevorzugten konstruktiven Ausführung vorgesehen, dass der Magnetanker zwei Bereiche aufweist, die dichtend geführt sind.In order to make the damping space dense, it is provided in a particularly preferred structural design that the magnet armature has two areas which are sealingly guided.
Hierbei ist es in einer konstruktiv vorteilhaften Ausführung vorgesehen, dass der Magnetanker in Richtung des Schließgliedes einen im Durchmesser reduzierten Abschnitt aufweist, wobei der Durchmesser des Abschnitts geringer ist als der Durchmesser eines der Magnetspule zugewandten ersten Abschnitts und, dass der im Durchmesser reduzierte Abschnitt in dem Führungselement dichtend geführt ist.Here, it is provided in a structurally advantageous embodiment, that the magnet armature in the direction of the closing member has a reduced diameter portion, wherein the diameter of the portion is smaller than the diameter of a magnetic coil facing the first portion and that the reduced diameter portion in the Guide element is sealingly guided.
Zusätzlich oder alternativ lassen sich die Dämpfungseigenschaften des Magnetankers auch dadurch beeinflussen, dass der Magnetanker im Bereich des Abschnitts einen Bund aufweist, der zusammen mit der Wand des Führungselements eine Ringspaltdrossel ausbildet.Additionally or alternatively, the damping properties of the magnet armature can also be influenced by the fact that the magnet armature in the region of the section has a collar which, together with the wall of the guide element, forms an annular gap choke.
Hierbei ist es besonders bevorzugt vorgesehen, dass der Bund in Axialrichtung betrachtet eine Höhe aufweist, die vorzugsweise zwischen dem 2-Fachen und 10-Fachen der Weite entspricht, wobei unter der Weite der Spalt zwischen dem Bund am Magnetanker und der Wand an dem Führungselement verstanden wird. Durch diese spezielle geometrische Auslegung lässt sich eine geringe Empfindlichkeit auf Temperaturänderungen erreichen.It is particularly preferably provided that the collar viewed in the axial direction has a height which preferably corresponds to between 2 times and 10 times the width, wherein understood by the width of the gap between the collar on the armature and the wall on the guide element becomes. This special geometric design makes it possible to achieve low sensitivity to temperature changes.
Da im Niederdruckbereich eines Injektors typischerweise nur ein geringer Druck von kleiner 10 bar, bei Magnetinjektoren meist nur ca. 1,5 bar absolut, vorhanden ist, ist eine schnelle Befüllung des Dämpfungsraumes bei der Öffnungsbewegung des Schließgliedes nicht gegeben. Auch die Erzeugung von Kavitation im Dämpfungsraum durch Unterschreiten des Dampfdruckes ist kritisch aufgrund des niedrigen Druckniveaus im Niederdruckbereich. Dadurch wird die Dämpfungskraft verringert und es kann zu Schäden an den Bauteilen kommen. Um dies auszuschließen, wird in einer weiteren vorteilhaften Weiterbildung vorgeschlagen, dass der Dämpfungsraum eine Dämpfungsfläche aufweist, dass in dem Niederdruckbereich ein absoluter Flüssigkeitsdruck herrscht und dass sich die Dämpfungsfläche berechnet aus A > 50 mm2/√(p), wobei der typische Druckbereich üblicherweise zwischen 0 und 15 bar absolut beträgt.Since in the low-pressure region of an injector typically only a low pressure of less than 10 bar, magnetic injectors usually only about 1.5 bar absolute, is present, a rapid filling of the damping chamber in the opening movement of the closing member is not given. The generation of cavitation in the damping chamber by falling below the vapor pressure is critical because of the low pressure level in the low pressure range. This reduces the damping force and can damage the components. To exclude this, it is proposed in a further advantageous development that the damping chamber has an attenuation surface, that in the low-pressure region an absolute fluid pressure prevails and that the attenuation surface calculated from A> 50 mm 2 / √ (p), the typical pressure range usually between 0 and 15 bar absolute.
Die erfindungsgemäß vorgeschlagene Dämpfungseinrichtung lässt sich insbesondere bei schnell schaltenden Ventilen einsetzen, da dort die Problematik des Prellens des Schließgliedes an seinem Ventilsitz besonders stark ausgebildet ist.The inventively proposed damping device can be used in particular in fast-switching valves, since there is the problem of bouncing of the closure member is particularly strong at its valve seat.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen. Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.
Diese zeigen in:These show in:
In der
Innerhalb eines Injektorkörpers
Von einer oberen Stirnseite
Der Anker
Über die Dimensionierung, d. h. das Längen/Breitenverhältnis der Durchgangsbohrung
Von der unteren Stirnseite
Der Anker
Über die Bewegung des Ankers
In der
Die soweit dargestellten und beschriebenen Kraftstoff-Injektoren
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
- DE 102009045728 A1 [0002] DE 102009045728 A1 [0002]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910046371 DE102009046371A1 (en) | 2009-11-04 | 2009-11-04 | Magnetic valve for fuel injector, comprises armature which is actuated by magnetic coil, where armature is provided as closing unit which controls aperture for fluid, where damping device has damping area |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910046371 DE102009046371A1 (en) | 2009-11-04 | 2009-11-04 | Magnetic valve for fuel injector, comprises armature which is actuated by magnetic coil, where armature is provided as closing unit which controls aperture for fluid, where damping device has damping area |
Publications (1)
Publication Number | Publication Date |
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DE102009046371A1 true DE102009046371A1 (en) | 2011-05-05 |
Family
ID=43828593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE200910046371 Withdrawn DE102009046371A1 (en) | 2009-11-04 | 2009-11-04 | Magnetic valve for fuel injector, comprises armature which is actuated by magnetic coil, where armature is provided as closing unit which controls aperture for fluid, where damping device has damping area |
Country Status (1)
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DE (1) | DE102009046371A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010040620A1 (en) | 2010-09-13 | 2012-03-15 | Robert Bosch Gmbh | Magnetic valve for common-rail injector for injecting diesel into combustion chamber of diesel engine, has armature comprising plate-like portion whose outer portion cooperates with body of damping device at side facing closing element |
DE102011089198A1 (en) | 2011-12-20 | 2013-06-20 | Robert Bosch Gmbh | Solenoid valve for e.g. common rail injector used for injecting fuel into combustion chamber of combustion engine, has damping sleeve that is movably arranged along longitudinal axis by force of spring element towards sealing surface |
DE102014215879A1 (en) * | 2014-08-11 | 2016-02-11 | Continental Teves Ag & Co. Ohg | Electromagnetic valve |
CN106894926A (en) * | 2017-01-25 | 2017-06-27 | 中国第汽车股份有限公司 | The control valve of automatically controlled Fuelinjection nozzle |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009045728A1 (en) | 2009-10-15 | 2011-04-21 | Robert Bosch Gmbh | Magnetic valve for use in common-rail injector, has valve housing actuated by armatures in uncontrolled state of magnetic coil, where movement of housing is delayed using damping elements in direction of valve seat |
-
2009
- 2009-11-04 DE DE200910046371 patent/DE102009046371A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009045728A1 (en) | 2009-10-15 | 2011-04-21 | Robert Bosch Gmbh | Magnetic valve for use in common-rail injector, has valve housing actuated by armatures in uncontrolled state of magnetic coil, where movement of housing is delayed using damping elements in direction of valve seat |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010040620A1 (en) | 2010-09-13 | 2012-03-15 | Robert Bosch Gmbh | Magnetic valve for common-rail injector for injecting diesel into combustion chamber of diesel engine, has armature comprising plate-like portion whose outer portion cooperates with body of damping device at side facing closing element |
DE102011089198A1 (en) | 2011-12-20 | 2013-06-20 | Robert Bosch Gmbh | Solenoid valve for e.g. common rail injector used for injecting fuel into combustion chamber of combustion engine, has damping sleeve that is movably arranged along longitudinal axis by force of spring element towards sealing surface |
DE102014215879A1 (en) * | 2014-08-11 | 2016-02-11 | Continental Teves Ag & Co. Ohg | Electromagnetic valve |
CN106894926A (en) * | 2017-01-25 | 2017-06-27 | 中国第汽车股份有限公司 | The control valve of automatically controlled Fuelinjection nozzle |
CN106894926B (en) * | 2017-01-25 | 2018-12-18 | 中国第一汽车股份有限公司 | The control valve of automatically controlled fuel injection valve |
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Legal Events
Date | Code | Title | Description |
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R005 | Application deemed withdrawn due to failure to request examination |