EP1293664A2 - Kraftstoffeinspritzventil für eine Brennkraftmaschine - Google Patents
Kraftstoffeinspritzventil für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP1293664A2 EP1293664A2 EP02102362A EP02102362A EP1293664A2 EP 1293664 A2 EP1293664 A2 EP 1293664A2 EP 02102362 A EP02102362 A EP 02102362A EP 02102362 A EP02102362 A EP 02102362A EP 1293664 A2 EP1293664 A2 EP 1293664A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- injection valve
- fuel injection
- distance
- injector
- 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.)
- Ceased
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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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
Definitions
- the present invention relates to a fuel injector for an internal combustion engine according to the preamble of Claim 1.
- a fuel injection valve is known from WO 00/60233, in which several injector modules are arranged axially one above the other are. This results in several density levels between the injector modules.
- the individual injector modules are biased axially against each other with a union nut. This preload creates a surface pressure on the End faces of the injector modules so that they face outwards are sealed.
- recesses are formed in the end faces so that increased surface pressure in the not recessed areas and thereby results in an improved seal.
- the production such end faces of the injector modules relatively complex and expensive.
- the fuel injector according to the invention with injector modules is a distance between an inlet channel, over which is supplied with a high-pressure fuel is, and another channel introduced in the injector module smaller than a distance between the inlet channel and one outer edge of the injector module.
- the wall thickness between the inlet channel and the further channel smaller than the wall thickness from the inlet channel to the edge of the injector module. This will prevent any leakage in the inlet channel tends to lead inwards to the further channel. This leakage can then e.g.
- the fuel injection valve according to the invention can thus increase the security of the tightness Provide high pressure areas to the outside. Because they may Leakage occurring on the sealing surfaces of the injector modules in the Relation to switching leakage is very low for the Removal of the leakage no enlarged discharge channels provided become. This is the fuel injection valve according to the invention also suitable for pressures well over 1500 bar, because of the shortened sealing length towards the inside or the increased sealing length to the outside a secure seal of the End faces of the injector modules is possible.
- the inlet channel and one Guide channel which parts of the injection valve, such as e.g. a piston rod that receives less than a distance between the inlet channel and an outer edge of the injector module. This ensures that the sealing length between the inlet channel and the guide channel is smaller than the sealing length between the inlet channel and the edge of the injector modules. Leakage occurs at the inlet channel thus discharged to the guide channel.
- the channels in the injector modules are arbitrary can be arranged.
- the guide channel can e.g. arranged in the center or off-center to the fuel injector his.
- arranging the channels it should only be noted that that a high pressure channel is getting closer to you lower pressure channel than to the edge of the injector module is arranged.
- a distance between a return channel for leakage removal and the guide channel smaller than a distance of Guide channel to the outer edge of the injector modules.
- the return channel, the feed channel and the Guide channel arranged on any straight line.
- This straight line particularly preferably runs through a Center of the fuel injector. This allows the High-pressure seal according to the invention is particularly simple and be provided compact.
- the return channel and the feed channel an arbitrary straight line.
- the return channel and the inlet channel are in one Center line through the center of the injector modules.
- the inlet channel and the Guide channel there is preferably a distance between the inlet channel and the Guide channel smaller than a distance between the inlet channel and a pin hole.
- a distance is also preferred between the guide channel and the return channel smaller as a distance between the guide channel and the pin bore.
- the pin hole serves to accommodate connecting elements for connecting two neighboring injector modules.
- the sealing length is from the inlet channel or from Guide channel for the pin bore always larger than the sealing lengths to the channels through which a possibly occurring Leakage is to be dissipated. A possible leakage is not led to the pin holes, but to the guide channel or the return channel.
- the manufacture of the sealing surfaces can thus run cheaper because it is no longer necessary is complex sealing surfaces with precisely arranged recesses manufacture. Furthermore, the one derived inwards Leakage through fits and through an optimal component arrangement be limited.
- the present invention is particularly common rail injectors or usable with unit injector.
- FIG 1 is a fuel injector according to a first Embodiment of the present invention shown. As shown in Figure 1, this includes rotationally symmetrical Fuel injector multiple injector modules 1, 5, 6, 7 and 8, which are arranged axially one above the other and about e.g. a union nut 10 axially biased against each other are. The end faces of the injector modules 1 and 5, 5 and 6, 6 and 7 and 7 and 8 lie on top of each other and each form a sealing plane D.
- the injector modules 1, 5, 6, 7, 8 also preferably have one centrally arranged guide channel 3, which depending on its function in the respective injector modules has different diameters and different Components of the injector can accommodate. It should be noted that the guide channel is also arranged eccentrically can be.
- the injector modules 1, 5, 6, 7 and 8 also run an inlet channel 9, which fuel here via a side fuel connection 11 arranged on the injector head 1 leads through the injector modules to a nozzle body 8.
- the Nozzle body 8 closes and opens injection openings, via which an injection of fuel is known can be done.
- the sealing surfaces D of the injector modules are covered by the union nut 10 pressed against one another with high pretensioning force, in order to achieve a high level on the end faces of the injector modules To get surface pressure.
- the surface pressure depends on it from the preload force of the union nut 10.
- the preload causes a high surface pressure on the end faces the injector modules, whereby the guide channel 3 and the inlet channel 9 against each other and towards the outside are sealed.
- the inlet channel 9, the guide channel 3 and the return channel 2 lie on a center line M-M through the center S of the injector (see FIG. 2).
- Figure 3 is an injector module according to a second embodiment of the present invention.
- the same or functionally the same parts are with the the same reference numerals as in the first embodiment.
- a radius R 2 of the injection valve was enlarged in comparison with a radius R 1 of a conventional injection valve.
- the inlet channel 9 is shifted further inward to the center point S of the injection valve.
- a distance B between the inlet channel 9 and an outer edge of the injector module 1 is greater than a distance A between the inlet channel 9 and the guide channel 3.
- a longer sealing length towards the outside than the guide channel 3 is again provided. so that there is no leakage to the outside.
- the return channel 2 no longer arranged on the axis M-M through the center S, but offset.
- a distance C between the return channel 2 and the guide channel 3 is smaller than a distance E between the guide channel and the outer edge of the injector module. This results in an asymmetrical result in the second exemplary embodiment Drilling pattern.
- the second embodiment corresponds to the first Embodiment, so that on the description given there can be referred.
- the present invention relates to a fuel injection valve with injector modules 1, 5, 6, 7, 8, which are in the axial direction are arranged one above the other so that between result in flat sealing surfaces for the injector modules.
- the injector modules are against each other by means of a biasing means 10 braced so that a seal due to a high surface pressure between the sealing surfaces D of the injector modules he follows.
- a distance A between one Inlet channel 9 for supplying fuel under high pressure and a guide channel 3 smaller than a distance B between the Inlet channel 9 and an outer edge of the injector module.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Figur 1
- eine schematische Längsschnittansicht eines Kraftstoffeinspritzventils mit mehreren Injektormodulen gemäß einem ersten Ausführungsbeispiel der vorliegenden Erfindung,
- Figur 2
- ein Querschnitt durch das Kraftstoffeinspritzventil entlang der Linie A-A in Figur 1 und
- Figur 3
- ein Querschnitt durch ein Kraftstoffeinspritzventil gemäß einem zweiten Ausführungsbeispiel der vorliegenden Erfindung.
Claims (10)
- Kraftstoffeinspritzventil mit Injektormodulen (1, 5, 6, 7, 8), welche in Axialrichtung übereinander angeordnet sind und mittels Vorspannmitteln (10) axial verspannt sind, so dass sich berührende Stirnflächen zweier jeweils aneinander angrenzender Injektormodule (1, 5, 6, 7, 8) durch eine hohe Flächenpressung Dichtflächen (D) bilden, wobei in den Injektormodulen jeweils wenigstens ein Zulaufkanal (9) zum Zuführen von Kraftstoff unter hohem Druck und wenigstens ein weiterer Kanal (2, 3) eingebracht sind, dadurch gekennzeichnet, dass ein Abstand zwischen dem Zulaufkanal (9) und einem weiteren Kanal (2, 3) kleiner als ein Abstand (B) zwischen dem Zulaufkanal (9) und einem äußeren Rand des Injektormoduls ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass ein Abstand (A) zwischen dem Zulaufkanal (9) und dem Führungskanal (3) kleiner als ein Abstand (B) zwischen dem Zulaufkanal (9) und einem äußeren Rand des Injektormoduls ist.
- Kraftstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, dass der Führungskanal (3) außermittig von einem Mittelpunkt (S) des Kraftstoffeinspritzventils angeordnet ist.
- Kraftstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, dass der Führungskanal (3) mittig im Kraftstoffeinspritzventil angeordnet ist.
- Kraftstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Abstand (C) zwischen einem Rücklaufkanal (2) zum Abführen einer Leckage des Kraftstoffeinspritzventils und dem Führungskanal (3) kleiner ist als ein Abstand (E) des Führungskanals (3) zum äußeren Rand des Injektormoduls.
- Kraftstoffeinspritzventil nach Anspruch 5, dadurch gekennzeichnet, dass der Rücklaufkanal (2), der Zulaufkanal (9) und der Führungskanal (3) auf einer Geraden liegen.
- Kraftstoffeinspritzventil nach Anspruch 6, dadurch gekennzeichnet, dass die Gerade durch den Mittelpunkt (S) des Kraftstoffeinspritzventils verläuft.
- Kraftstoffeinspritzventil nach Anspruch 5, dadurch gekennzeichnet, dass der Rücklaufkanal (2) und der Zulaufkanal (9) auf einer Mittellinie (M-M) durch den Mittelpunkt (S) des Kraftstoffeinspritzventils liegen.
- Kraftstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Abstand zwischen dem Zulaufkanal (9) und dem Führungskanal (3) kleiner ist als ein Abstand zwischen dem Zulaufkanal (9) und einer Bohrung (4) zur Aufnahme eines Verbindungselements.
- Kraftstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Abstand zwischen dem Führungskanal (3) und dem Rücklaufkanal (2) kleiner ist als ein Abstand zwischen dem Führungskanal (3) und der Bohrung (4) zur Aufnahme eines Verbindungselements.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10145989 | 2001-09-18 | ||
DE10145989 | 2001-09-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1293664A2 true EP1293664A2 (de) | 2003-03-19 |
EP1293664A3 EP1293664A3 (de) | 2004-03-10 |
Family
ID=7699432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02102362A Ceased EP1293664A3 (de) | 2001-09-18 | 2002-09-16 | Kraftstoffeinspritzventil für eine Brennkraftmaschine |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1293664A3 (de) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000060233A1 (de) | 1999-03-31 | 2000-10-12 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil für eine brennkraftmaschine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2324743A1 (de) * | 1973-05-16 | 1974-12-12 | Atlantic Diesel As | Verfahren zum zusammensetzen von brennstoffventilen fuer dieselmotoren sowie brennstoffventil und vorrichtung zur ausfuehrung des verfahrens |
JPH03260369A (ja) * | 1990-03-09 | 1991-11-20 | Isuzu Motors Ltd | 蓄圧式燃料噴射装置 |
CH689282A5 (de) * | 1994-03-29 | 1999-01-29 | Christian Dipl-Ing Eth Mathis | Einspritzventil fuer eine insbesondere als Dieselmotor vorgesehene Brennkraftmaschine. |
JPH08303317A (ja) * | 1995-05-08 | 1996-11-19 | Nippondenso Co Ltd | 燃料噴射装置 |
DE19705227A1 (de) * | 1997-02-12 | 1998-08-13 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19843915C2 (de) * | 1998-09-24 | 2000-08-03 | Siemens Ag | Bauteilverbindung |
DE19914714C2 (de) * | 1999-03-31 | 2001-09-20 | Siemens Ag | Injektor für Speicher-Kraftstoffeinspritzsysteme |
JP3928362B2 (ja) * | 2001-02-14 | 2007-06-13 | 株式会社デンソー | 流体移送装置のシール面圧向上構造 |
-
2002
- 2002-09-16 EP EP02102362A patent/EP1293664A3/de not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000060233A1 (de) | 1999-03-31 | 2000-10-12 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil für eine brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
EP1293664A3 (de) | 2004-03-10 |
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