DE102006027485A1 - Fuel injector with safety control valve - Google Patents
Fuel injector with safety control valve Download PDFInfo
- Publication number
- DE102006027485A1 DE102006027485A1 DE102006027485A DE102006027485A DE102006027485A1 DE 102006027485 A1 DE102006027485 A1 DE 102006027485A1 DE 102006027485 A DE102006027485 A DE 102006027485A DE 102006027485 A DE102006027485 A DE 102006027485A DE 102006027485 A1 DE102006027485 A1 DE 102006027485A1
- Authority
- DE
- Germany
- Prior art keywords
- control
- pressure
- fuel injection
- control valve
- injection valve
- 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- Withdrawn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
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
-
- 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
- F02M63/0073—Pressure balanced valves
-
- 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
- F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
- F02M63/008—Hollow valve members, e.g. members internally guided
-
- 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
- F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
-
- 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
- F02M2547/003—Valve inserts containing control chamber and valve piston
Abstract
Description
Stand der TechnikState of the art
Aus
dem Stand der Technik sind Einspritzventile für schnelllaufende, selbstzündende Brennkraftmaschinen,
die den Kraftstoff direkt in einen Brennraum einer Brennkraftmaschine
einbringen, seit längerer
Zeit bekannt. So ist aus der Offenlegungsschrift
Neben
dem bekannten Magnetventil, bei dem eine Stahlkugel gegen einen
konischen Sitz gepresst wird und dadurch die Ablaufdrossel verschließt, durch
die Kraftstoff aus dem Steuerraum in den Leckölraum abfließen kann,
ist als alternatives Konzept aus der
Durch eine Schließfeder wird die Hülse gegen einen Dichtsitz gepresst und verschließt dadurch den Ringraum nach außen. Soll eine Einspritzung erfolgen, so wird die Hülse über den Elektromagneten vom Dichtsitz weggezogen, was durch die fehlende hydraulische Kraftkomponente unter Überwindung der relativ kleinen Schließkraft der Schließfeder sehr schnell geschehen kann. Dadurch wird – wie bei den bekannten Kugelventilen – der Steuerraum mit einem Leckölraum verbunden und dadurch druckentlastet.By a closing spring becomes the sleeve pressed against a sealing seat and thereby closes the annulus Outside. If an injection takes place, then the sleeve via the electromagnet from Seated seat pulled away, due to the lack of hydraulic force component overcoming the relatively small clamping force the closing spring can happen very fast. This will - as in the known ball valves - the control room with a leakage oil room connected and thereby depressurized.
Bei allen Kraftstoffeinspritzsystemen, insbesondere bei Common-Rail-Einspritzsystemen, kann das Problem auftreten, dass es zu einem Überdruck innerhalb des Kraftstoffeinspritzventils oder des Hochdruckspeichers kommt. Zur Vermeidung dieses Überdrucks im Kraftstoffspeicher verfügt dieser in der Regel über ein Entlastungsventil, das bei einem zu hohen Druck öffnet und den überschüssigen Kraftstoff in den Kraftstofftank abführt. Tritt jedoch innerhalb des Kraftstoffeinspritzventils ein Überdruck auf, so besteht die Möglichkeit, dass der Druck nicht rasch genug über das Entlastungsventil des Hochdruckspeichers abgebaut werden kann und es so zu Schäden innerhalb des Kraftstoffeinspritzventils kommt.at all fuel injection systems, in particular in common-rail injection systems, The problem may occur that there is an overpressure inside the fuel injector or the high-pressure accumulator comes. To avoid this overpressure in fuel storage this usually about a relief valve that opens at too high a pressure and the excess fuel into the fuel tank. But occurs within the fuel injection valve, an overpressure on, so there is a possibility that the pressure does not reach the relief valve quickly enough High-pressure accumulator can be degraded and it causes damage within of the fuel injection valve comes.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Kraftstoffeinspritzventil mit den kennzeichnenden Merkmales des Patentanspruchs 1 weist demgegenüber den Vorteil auf, dass Druckspitzen innerhalb des Kraftstoffeinspritzventils rasch abgebaut und somit Schäden an diesem vermieden werden. Hierzu ist das Steuerventil derart ausgebildet, dass das bewegliche Steuerventilglied bei einem Überdruck im Steuerraum entgegen der Kraft einer Schließfeder aufgedrückt und der Druck damit in einen Leckölraum entspannt wird. Dies geschieht allein durch den anstehenden Druck im Steuerraum, so dass der die Hülse sonst bewegende Elektromagnet nicht angesteuert zu werden braucht. Damit können Druckspitzen effektiv und sehr schnell abgebaut werden. Es ist auch möglich, dass das Entlastungsventil im Hochdruckspeicher entfällt und ein eventuell auftretender übergroßer Druck im Hochdruckspeicher statt dessen über eines oder mehrere der angeschlossenen Kraftstoffeinspritzventile abgebaut wird.The Fuel injection valve according to the invention with the characterizing feature of claim 1, in contrast, the Advantage on that pressure peaks within the fuel injector rapidly degraded and thus damage avoided at this. For this purpose, the control valve is designed such that the movable control valve member against an overpressure in the control room the force of a closing spring pressed and the pressure is thus released into a leakage oil space. This happens solely by the upcoming pressure in the control room, so that the sleeve otherwise moving electromagnet does not need to be controlled. In order to can Pressure peaks are broken down effectively and very quickly. It is also possible, that the relief valve is omitted in the high-pressure accumulator and a possible excessive pressure in the high-pressure accumulator instead of one or more of connected fuel injection valves is dismantled.
In einer ersten vorteilhaften Ausgestaltung ist das Steuerventilglied in Form einer Steuerhülse ausgebildet, die gleitverschiebbar auf einem Steuerventilkörper gelagert ist. Bei einer solchen Anordnung ist innerhalb der Steuerhülse eine Druckstufe vorgesehen, die da für sorgt, dass die Steuerhülse bei Überschreiten eines bestimmten Grenzdrucks, der sich durch die Fläche der Druckstufe und die Kraft der Schließfeder bestimmt, vom Dichtsitz abgehoben wird und dadurch eine Entlastung des Steuerraums bewirkt. Sobald der Druck wieder unterhalb des Grenzdrucks abfällt, bewegt sich die Dichthülse zurück auf den Dichtsitz und verschließt den Steuerraum gegen den Leckölraum. Deshalb kommt es zu keiner Absenkung des Kraftstoffdrucks im Steuerraum unter das im Hochdruckspeicher herrschende Niveau, so dass das Kraftstoffeinspritzventil zu jedem Zeitpunkt für eine Kraftstoffeinspritzung bereit ist.In A first advantageous embodiment is the control valve member formed in the form of a control sleeve, which is slidably mounted on a control valve body. At a such arrangement is provided within the control sleeve, a pressure stage, who is there for ensures that the control sleeve when crossing a certain limit pressure, which is determined by the area of the Compression and the force of the closing spring determined by the sealing seat is lifted and thereby causes a discharge of the control room. As soon as the pressure drops again below the limit pressure, moves the sealing sleeve back on the sealing seat and closes the control room against the leak oil room. Therefore, there is no lowering of the fuel pressure in the control room below the prevailing in the high-pressure accumulator level, so that the fuel injection valve at any time for a fuel injection is ready.
In einer zweiten vorteilhaften Ausgestaltung ist das Steuerventilglied in Form eines Steuerkolbens ausgebildet, der in einer Kolbenbohrung des Steuerventilkörpers gleitverschiebbar gelagert ist. Die Ringnut ist in diesem Fall im Steuerkolben ausgebildet, so dass sich dadurch eine resultierende Kraft auf den Steuerkolben ergibt, die vom Dichtsitz weggerichtet ist. Die Funktion ist ansonsten identisch mit der der Steuerventilhülse.In A second advantageous embodiment is the control valve member formed in the form of a control piston which is in a piston bore of the control valve body is slidably mounted. The ring groove is in this case in Control piston formed, thereby resulting in a resulting Force on the control piston, which is directed away from the sealing seat. The function is otherwise identical to that of the control valve sleeve.
Zeichnungdrawing
In der Zeichnung sind verschiedene Ausführungsbeispiele des erfindungsgemäßen Kraftstoffeinspritzventils dargestellt. Es zeigtIn the drawing are various embodiments of the fuel injection valve according to the invention shown. It shows
Beschreibung der AusführungsbeispieleDescription of the embodiments
In
Im
Haltekörper
Zur
Zuführung
des Kraftstoffs unter hohem Druck ist eine Hochdruckpumpe
Mit
seinem der Düse
Zur
Absenkung des Kraftstoffdrucks im Steuerraum
An
der Innenseite der Steuerhülse
Die
Funktionsweise des Kraftstoffeinspritzventils ist aus dem Stand
der Technik hinreichend bekannt und soll hier nur kurz angerissen
werden. Für einen
Einspritzung wird der Elektromagnet
Beim
Auftreten von Überdruck,
beispielsweise im Zulaufkanal
In
Die
Funktion ist insoweit identisch mit der Funktion der Steuerhülse
Claims (9)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006027485A DE102006027485A1 (en) | 2006-06-14 | 2006-06-14 | Fuel injector with safety control valve |
EP07107002A EP1867868B1 (en) | 2006-06-14 | 2007-04-26 | Fuel injector with safety operating valve |
AT07107002T ATE517249T1 (en) | 2006-06-14 | 2007-04-26 | FUEL INJECTION VALVE WITH SAFETY CONTROL VALVE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006027485A DE102006027485A1 (en) | 2006-06-14 | 2006-06-14 | Fuel injector with safety control valve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006027485A1 true DE102006027485A1 (en) | 2007-12-20 |
Family
ID=38481640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006027485A Withdrawn DE102006027485A1 (en) | 2006-06-14 | 2006-06-14 | Fuel injector with safety control valve |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1867868B1 (en) |
AT (1) | ATE517249T1 (en) |
DE (1) | DE102006027485A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007037825A1 (en) | 2007-08-10 | 2009-02-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE102007037824A1 (en) | 2007-08-10 | 2009-02-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE102007040248A1 (en) | 2007-08-27 | 2009-03-05 | Robert Bosch Gmbh | Control valve for a fuel injector |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008005534A1 (en) * | 2008-01-22 | 2009-07-23 | Robert Bosch Gmbh | fuel injector |
DE102008001600A1 (en) * | 2008-05-06 | 2009-11-12 | Robert Bosch Gmbh | Fuel injector with a pressure valve having a control valve |
DE102009029355A1 (en) * | 2009-09-10 | 2011-03-24 | Robert Bosch Gmbh | injector |
DE102011090060A1 (en) * | 2011-12-28 | 2013-07-04 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9508623D0 (en) * | 1995-04-28 | 1995-06-14 | Lucas Ind Plc | "Fuel injection nozzle" |
DE10024662B4 (en) * | 2000-05-18 | 2005-12-15 | Siemens Ag | Method for operating an injection valve |
DE10104618A1 (en) * | 2001-02-02 | 2002-08-08 | Bosch Gmbh Robert | Valve for controlling liquids |
DE10163693A1 (en) * | 2001-12-21 | 2003-07-10 | Orange Gmbh | Injection injector for internal combustion engines |
US7278593B2 (en) * | 2002-09-25 | 2007-10-09 | Caterpillar Inc. | Common rail fuel injector |
DE602004004254T2 (en) * | 2004-06-30 | 2007-07-12 | C.R.F. S.C.P.A. | Servo valve for controlling an injection valve of an internal combustion engine |
-
2006
- 2006-06-14 DE DE102006027485A patent/DE102006027485A1/en not_active Withdrawn
-
2007
- 2007-04-26 EP EP07107002A patent/EP1867868B1/en not_active Not-in-force
- 2007-04-26 AT AT07107002T patent/ATE517249T1/en active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007037825A1 (en) | 2007-08-10 | 2009-02-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE102007037824A1 (en) | 2007-08-10 | 2009-02-12 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
EP2025922A2 (en) | 2007-08-10 | 2009-02-18 | Robert Bosch Gmbh | Fuel injector valve for combustion engines |
DE102007040248A1 (en) | 2007-08-27 | 2009-03-05 | Robert Bosch Gmbh | Control valve for a fuel injector |
Also Published As
Publication number | Publication date |
---|---|
EP1867868A1 (en) | 2007-12-19 |
ATE517249T1 (en) | 2011-08-15 |
EP1867868B1 (en) | 2011-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20130615 |