DE102005053133A1 - Fuel injector for injecting fuel in combustion chamber of internal combustion engine, consists of closing body which has closing element, which has opening increasing pressure level at seat of closing element - Google Patents
Fuel injector for injecting fuel in combustion chamber of internal combustion engine, consists of closing body which has closing element, which has opening increasing pressure level at seat of closing element Download PDFInfo
- Publication number
- DE102005053133A1 DE102005053133A1 DE200510053133 DE102005053133A DE102005053133A1 DE 102005053133 A1 DE102005053133 A1 DE 102005053133A1 DE 200510053133 DE200510053133 DE 200510053133 DE 102005053133 A DE102005053133 A DE 102005053133A DE 102005053133 A1 DE102005053133 A1 DE 102005053133A1
- Authority
- DE
- Germany
- Prior art keywords
- closing element
- fuel injector
- seat
- diffuser
- 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- Withdrawn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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/188—Spherical or partly spherical shaped valve member ends
-
- 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
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0043—Two-way 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/02—Fuel-injection apparatus having means for reducing wear
-
- 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
- F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
-
- 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
Landscapes
- 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
Bei Kraftstoffinjektoren stellt sich während des Betriebes ein Verschleiß an der Sitzfläche für das kugelförmig ausgebildete Schließelement am Ventilstück ein. Dieser Verschleiß führt zu ungewollten Undichtigkeiten und damit zu Injektorfehlfunktionen. Dieser Verschleiß hat seine Ursache im Materialabtrag am Sitz des kugelförmigen Schließelementes, welcher auf Kavitationserosion zurückzuführen ist. Schlagartig zusammenbrechende Dampfblasen im durch die Ablaufdrossel aus dem Steuerraum abströmenden Kraftstoff brechen zusammen, wodurch die Oberfläche des Ventilstücks im Sitzbereich des kugelförmig ausgebildeten Schließelementes zerstört wird. Aufgrund der Kavitationserosion bilden sich in der Sitzfläche des Ventilstückes Grübchen aus, die durch das kugelförmig ausgebildete Schließelement nicht mehr vollständig abgedichtet werden können, wenn das kugelförmig ausgebildete Schließelement in die durch Kavitationserosion vorgeschädigte Sitzfläche gestellt wird. Sich einstellende Undichtigkeiten, das heißt ein kontinuierliches Abströmen von Kraftstoff aus dem Steuerraum sowie Injektorfehlfunktionen sind die Folge.at Fuel injectors will wear out during operation seat for the spherically formed closing element at the valve piece one. This wear leads to unwanted Leaks and thus to injector malfunctions. This wear has its Cause in the material removal at the seat of the spherical closure element, which due to cavitation erosion. abruptly collapsing vapor bubbles in through the outlet throttle from the Outflow control room Fuel breaks down, causing the surface of the valve piece in the seating area of the spherical trained closing element gets destroyed. Due to the cavitation erosion form in the seat of the valve piece dimple out through the spherical trained closing element not more completely can be sealed if the spherical trained closing element in the seat surface pre-damaged by cavitation erosion becomes. Self-adjusting leaks, that is a continuous outflow of fuel from the control room as well as injector malfunctions are the result.
Andererseits ist Kavitation, das heißt eine Dampferzeugung an der Ablaufdrossel innerhalb des Ventilstückes gewollt und notwendig um den Kraftstoffdurchfluss unabhängig vom Gegendruck und den geometrischen Verhältnissen nach der Ablaufdrossel zu gestalten.on the other hand is cavitation, that is a steam generation at the outlet throttle within the valve piece wanted and necessary to the fuel flow regardless of the back pressure and the geometric relationships to design after the outlet throttle.
Offenbarung der Erfindungepiphany the invention
Aufgabe der vorliegenden Erfindung ist es, unter Beibehaltung von Kavitation des Kraftstoffs an der Ablaufdrossel des Steuerraums eines Kraftstoffinjektors die Kondensation von Dampf im Sitzbereich des Schließelementes zu vermeiden.task The present invention is while retaining cavitation of the fuel at the outlet throttle of the control chamber of a fuel injector the condensation of steam in the seating area of the closing element to avoid.
Erfindungsgemäß wird vorgeschlagen, das Schließelement, welches in die Ventilsitzfläche des Ventilstücks des Kraftstoffinjektors angestellt ist, so auszugestalten, dass sich das Druckniveau in einem der Ablaufdrossel nachgeschalteten Diffusor, der in der Ventilsitzfläche mündet, erhöht. Aufgrund des höheren Druckniveaus können Kondensationsgebiete vermieden werden, sodass Kavitationserosion aufgrund zusammenbrechender Kraftstoffdampfblasen unterbleibt und die mechanische Beanspruchung der Ventilsitzfläche aufgrund zusammenbrechender Kraftstoffblasen verringert wird. Damit ist die mechanische Beanspruchung der Ventilsitzfläche unterhalb des Schließelementes entscheidend herabgesetzt.According to the invention, it is proposed the closing element, which in the valve seat surface of the valve piece of the fuel injector is hired, so that the pressure level downstream in one of the outlet throttle Diffuser, which opens in the valve seat surface increases. Due to the higher pressure level can Condensation areas are avoided, so that cavitation erosion due to collapsing fuel vapor bubbles is omitted and the mechanical stress on the valve seat surface due to collapsing fuel bubbles is reduced. Thus, the mechanical stress of the valve seat surface is below the closing element decisively lowered.
In einer Ausgestaltungsvariante wird ein Schließelement vorgeschlagen, welches einen Führungskörper mit einem daran ausgebildeten halbkugelförmigen Schließelement aufweist, welches eine Öffnung enthält. Das halbkugelförmige Schließelement und der Führungskörper werden bevorzugt als ein Bauteil hergestellt, um die Position des halbkugelförmig ausgebildeten Schließelementes beizubehalten und dessen Verkippen zu verhindern. Damit ist sichergestellt, dass eine das Druckniveau erhöhende Öffnung innerhalb eines sich an die Ablaufdrossel anschließenden Diffusors wie zum Beispiel eine Bohrung, in optimaler Lage der Diffusoröffnung in der Ventilsitzfläche gegenüber liegt.In a variant embodiment, a closing element is proposed, which a guide body with a hemispherical closing element formed thereon which has an opening contains. The hemispherical closing element and the leader body preferably manufactured as a component to the position of the hemispherical formed closing element to maintain and prevent its tilting. This ensures that a pressure level increasing opening within a subsequent to the outlet throttle diffuser such as a bore, in an optimal position of the diffuser opening in the valve seat surface is opposite.
Die das Druckniveau erhöhende Öffnung im halbkugelförmigen Schließelement kann zum Beispiel als eine Bohrung ausgebildet werden, die mit einer vordefinierten Tiefe und einem bestimmten Durchmesser in die Oberfläche des halbkugelförmig ausgebildeten Schließelementes eingebracht werden kann. Bevorzugt wird der Einlaufbereich der Öffnung, die bevorzugt als Bohrung ausgebildet ist, mit Einlaufverrundungen versehen.The the pressure level increasing opening in the hemispherical closing element can be formed, for example, as a bore with a predefined depth and a certain diameter in the surface of the hemispherical shaped closing element can be introduced. Preference is given to the inlet region of the opening, which is preferably designed as a bore, with inlet fillets Mistake.
Aufgrund der Öffnung in der sphärischen Oberfläche des halbkugelförmig ausgebildeten Schließelementes stellt sich im Diffusor, welcher der Ablaufdrossel des Steuerraums nachgeschaltet ist und der in der Ventilsitzfläche des Ventilstücks mündet, ein höherer Druck ein. Somit erfolgt eine sich einstellende Kondensation des Kraftstoffdampfes unmittelbar nach der Ablaufdrossel im Einlaufbereich in den Diffusor. Da sich an der Mündung des Diffusors in der Ventilsitzfläche aufgrund der Öffnung im bevorzugt halbkugelförmig ausgebildeten Schließelement ein höheres Druckniveau einstellt, verschwinden die Kondensationsbereiche, sodass es im Bereich des Austritts der Kraftstoffströmung aus dem Diffusor nicht zu Kavitationserscheinungen kommt und demzufolge die Ventilsitzfläche keiner Kavitationserosion ausgesetzt ist.by virtue of the opening in the spherical surface of the hemispherical trained closing element arises in the diffuser, which is the outlet throttle of the control room downstream and which opens into the valve seat surface of the valve piece, a higher Pressure. Thus, there is an adjusting condensation of the Fuel vapor immediately after the outlet throttle in the inlet area in the diffuser. As at the mouth of the diffuser in the Valve seat due to the opening in the preferred hemispherical trained closing element higher Pressure level disappears, the condensation areas disappear, so it is not in the region of the exit of the fuel flow from the diffuser cavitation phenomena occurs and therefore the valve seat surface none Cavitation erosion is exposed.
Zeichnungdrawing
Anhand der Zeichnung wird die Erfindung nachstehend näher erläutert.Based the drawing, the invention is explained in more detail below.
Es zeigt:It shows:
Ausführungsbeispieleembodiments
Aus
der Darstellung gemäß
Der
in
Im
oberen Teil des Kraftstoffinjektors
Die
Ankerführung
Aus
der Darstellung gemäß
Ein
in
Die
sphärische
Oberfläche
der Halbkugel
Die Öffnung
Aus
der Darstellung gemäß
Aufgrund
der Öffnung
Der
Darstellung gemäß
Der
Vollständigkeit
halber sei erwähnt,
das in der Darstellung gemäß
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510053133 DE102005053133A1 (en) | 2005-11-08 | 2005-11-08 | Fuel injector for injecting fuel in combustion chamber of internal combustion engine, consists of closing body which has closing element, which has opening increasing pressure level at seat of closing element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510053133 DE102005053133A1 (en) | 2005-11-08 | 2005-11-08 | Fuel injector for injecting fuel in combustion chamber of internal combustion engine, consists of closing body which has closing element, which has opening increasing pressure level at seat of closing element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005053133A1 true DE102005053133A1 (en) | 2007-05-10 |
Family
ID=37949906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200510053133 Withdrawn DE102005053133A1 (en) | 2005-11-08 | 2005-11-08 | Fuel injector for injecting fuel in combustion chamber of internal combustion engine, consists of closing body which has closing element, which has opening increasing pressure level at seat of closing element |
Country Status (1)
Country | Link |
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DE (1) | DE102005053133A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2541036A1 (en) * | 2011-06-29 | 2013-01-02 | Robert Bosch Gmbh | Switching valve, method for producing a switching valve and fuel injector with a switching valve |
WO2014000959A1 (en) * | 2012-06-29 | 2014-01-03 | Robert Bosch Gmbh | Valve reducing leakage and slipping |
WO2015097004A1 (en) * | 2013-12-23 | 2015-07-02 | Robert Bosch Gmbh | An injection valve |
WO2016206834A1 (en) * | 2015-06-26 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector |
EP3115592A3 (en) * | 2015-07-08 | 2017-01-25 | Robert Bosch Gmbh | A control valve for fuel injector and a fuel injector |
EP3301296A1 (en) * | 2016-09-13 | 2018-04-04 | Robert Bosch GmbH | Pressure control valve assembly and fuel injection device |
WO2020136025A1 (en) * | 2018-12-27 | 2020-07-02 | Robert Bosch Gmbh | A fuel flow path for a valve group of a fuel injector |
CN111472911A (en) * | 2020-03-20 | 2020-07-31 | 常熟理工学院 | Fuel injection valve assembly |
-
2005
- 2005-11-08 DE DE200510053133 patent/DE102005053133A1/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2541036A1 (en) * | 2011-06-29 | 2013-01-02 | Robert Bosch Gmbh | Switching valve, method for producing a switching valve and fuel injector with a switching valve |
WO2014000959A1 (en) * | 2012-06-29 | 2014-01-03 | Robert Bosch Gmbh | Valve reducing leakage and slipping |
WO2015097004A1 (en) * | 2013-12-23 | 2015-07-02 | Robert Bosch Gmbh | An injection valve |
WO2016206834A1 (en) * | 2015-06-26 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector |
CN107820538A (en) * | 2015-06-26 | 2018-03-20 | 罗伯特·博世有限公司 | Fuel injector |
CN107820538B (en) * | 2015-06-26 | 2020-05-19 | 罗伯特·博世有限公司 | Fuel injector |
EP3115592A3 (en) * | 2015-07-08 | 2017-01-25 | Robert Bosch Gmbh | A control valve for fuel injector and a fuel injector |
EP3301296A1 (en) * | 2016-09-13 | 2018-04-04 | Robert Bosch GmbH | Pressure control valve assembly and fuel injection device |
WO2020136025A1 (en) * | 2018-12-27 | 2020-07-02 | Robert Bosch Gmbh | A fuel flow path for a valve group of a fuel injector |
CN111472911A (en) * | 2020-03-20 | 2020-07-31 | 常熟理工学院 | Fuel injection valve assembly |
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Legal Events
Date | Code | Title | Description |
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R012 | Request for examination validly filed |
Effective date: 20120817 |
|
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |