EP1430218B1 - Ventil, insbesondere kraftstoffeinspritzventil - Google Patents
Ventil, insbesondere kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP1430218B1 EP1430218B1 EP02776723A EP02776723A EP1430218B1 EP 1430218 B1 EP1430218 B1 EP 1430218B1 EP 02776723 A EP02776723 A EP 02776723A EP 02776723 A EP02776723 A EP 02776723A EP 1430218 B1 EP1430218 B1 EP 1430218B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- annular groove
- valve body
- accordance
- fuel
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 28
- 238000002347 injection Methods 0.000 title claims description 22
- 239000007924 injection Substances 0.000 title claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 9
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Images
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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 invention relates to a valve, in particular a fuel injection valve for a high-pressure accumulator injection system of an internal combustion engine, as shown for example in DE 199 56 830 A, WO 0102718 A or GB 1334939A.
- a valve needle which is sealingly guided in a valve body of an injection valve and slidably disposed.
- the valve needle has at its tip a valve needle seat which, together with a valve body seat of the valve body, opens or closes at least one nozzle opening to the combustion chamber of the internal combustion engine.
- the at least one nozzle opening is typically arranged in the region of the valve body seat.
- nozzle body and axially movable nozzle needle can a seal between the pressure chamber and leakage chamber only by means of a sealing gap, as any type of conventional elastic seals the high pressure loads in the long term could not withstand.
- the sealing gap must be made very precisely be, even with fluctuating temperatures with the Resulting material expansions at any time a low-friction Guide the valve needle while doing a To ensure the best possible sealing effect.
- An object of the invention is to prevent the leakage of a Fuel injection valve of a high-pressure accumulator injection system to minimize.
- a valve in particular a fuel injection valve for a high-pressure accumulator injection system of an internal combustion engine, is a valve body with a valve body seat and one in the valve body within a stationary one circular cylindrical guide surface over a guide length Guided valve needle with a valve needle seat for Control of a nozzle opening is provided further provided that in the valve body under high pressure standing pressure reservoir in the form of a coaxial with Guide surface arranged annular groove is present.
- This valve according to the invention according to claim 1 has the advantage of a reduced Leakage between guide surface in the valve body and Valve needle guide on because the high pressure Pressure reservoir in the form of the annular groove an elastic deformation the guide surface of the valve body in the direction of Valve needle guide out causes. This elastic deformation reduces the sealing gap between valve needle guide and Guide surface to a minimum, thus ensuring for a significantly reduced leakage.
- a preferred embodiment of the invention provides that the annular groove through a hollow cylindrical wall section is separated from the guide surface of the valve body. This Wall section is subject to the occurring high pressures in the annular groove of an elastic deformation in the direction of Valve needle guide and ensures in this way for a reduction the fuel leak.
- the annular groove has a depth that at least one fifth of the guide length of the valve needle guide, which has the advantage of a sufficiently long wall section has, elastically deformed in the desired manner can be.
- the annular groove can also be much deeper be formed, for example. Up to half of the guide length of Valve needle guide.
- a preferred embodiment of the invention provides a hydraulic Connection between a fuel inlet of a Pressure chamber in the valve body and the annular groove, whereby the Ring groove at any time under full pressure in the fuel valve stands. In this way is the same time the deformation the wall portion depending on the ruling in the annular groove Fuel pressure. This has the advantage that normally at higher pressure increasing leakage through the at high pressure simultaneously reduced smaller sealing gap becomes.
- the annular groove preferably has a thickness which is at least one fifth of the diameter of the guide surface equivalent.
- the wall section between Valve body and annular groove on a thickness approximately the thickness of the annular groove corresponds.
- the leakage gap in the needle guide is from the annular groove separated by the wall section.
- the annular groove is through a Connecting groove in the nozzle body connected to the high-pressure bore.
- FIG. 1 shows a fuel injection valve according to the invention in a schematic sectional view.
- the injection valve 2 is made from a valve body 4 and a valve needle 6, the with a valve needle guide 8 in the valve body 4 tight is guided.
- a blind hole 12 of the valve body 4 is a or a plurality of nozzle openings 16 are provided.
- the valve needle 6 has a valve needle tip 7 with a seat edge 14 and a valve needle seat 18. This valve needle seat 18 sits on a valve body seat 20 and thus seals the injection valve 2 with the nozzle openings 16 from.
- the fuel passes through a fuel inlet 26 and a between the valve needle 6 and the valve body 4 lying annular pressure chamber 22 to the seat edge 14 and raised Valve needle 6 along the annular space 28 between the valve needle 6 and valve body shaft further on the blind hole 12th and the nozzle openings 16 in the combustion chamber of the internal combustion engine.
- a Ring groove 32 Coaxial with the guide surface 10 in the valve body 4 is a Ring groove 32 is provided, which has a rectangular cross-section having a depth T.
- the depth T of the annular groove 32 is in the embodiment shown about half a guide length L, which is the length of the axial guide the valve needle 6 with its valve needle guide 8 within characterized the hollow cylindrical guide surface.
- the guide length L can typically be about 10 mm, so that the depth T is at a value of about 5 mm.
- the depth T is one fifth of the guide length L of the valve needle guide 8, so that in this case the depth T is at a value of about 2 mm.
- the annular groove 32 is connected via a connecting groove 34 with the Fuel inlet 26 in conjunction, so that in the annular groove 32nd at any time the full fuel pressure prevails.
- the full fuel pressure no longer prevails, so that provided between the annular groove 32 and guide surface 10 hollow cylindrical wall portion 30 elastically inward in Direction to the valve needle guide 8 is deformed.
- the sealing gap 11 is reduced near the leakage area 36, what the total fuel leakage through the Sealing gap 11 reduced.
- FIG 2 shows a plan view of the fuel injection valve-according to Figure 1.
- the annular contour of the annular groove 32 is illustrated.
- the thickness D N of the annular groove 32 may correspond approximately to a thickness Dw of the wall portion 30.
- the connecting groove 34 which provides a hydraulic connection between the fuel inlet 26 and the annular groove 32.
- the thickness D W of the wall portion 30 and the thickness D N of the annular groove 32 may be approximately at a value of about 1 mm.
Landscapes
- 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)
Description
Bei herkömmlichen Kraftstoffinjektoren für Einspritzanlagen von Brennkraftmaschinen erfolgt die Steuerung der Kraftstoffeinspritzung typischerweise mittels einer Ventilnadel, die in einem Ventilkörper eines Einspritzventils dichtend geführt und verschiebbar angeordnet ist. Die Ventilnadel weist an ihrer Spitze einen Ventilnadelsitz auf, der zusammen mit einem Ventilkörpersitz des Ventilkörpers wenigstens eine Düsenöffnung zum Brennraum der Brennkraftmaschine öffnet oder schließt. Die wenigstens eine Düsenöffnung ist typischerweise im Bereich des Ventilkörpersitzes angeordnet.
- Figur 1
- ein erfindungsgemäßes Kraftstoffeinspritzventil in schematischer Schnittansicht und
- Figur 2
- eine Draufsicht auf das Kraftstoffeinspritzventil gemäß Figur 1.
Claims (6)
- Ventil, insbesondere Kraftstoffeinspritzventil für ein Hochdruckspeichereinspritzsystem einer Brennkraftmaschine, das einen Ventilkörper (4) mit einem Ventilkörpersitz (20) und eine in dem Ventilkörper (4) innerhalb einer stationären kreiszylinderförmigen Führungsfläche (10) über eine Führungslänge (L) geführte Ventilnadel (6) mit einem Ventilnadelsitz (18) zur Steuerung einer Düsenöffnung (16) aufweist, sowie ein Kraftstoffzulauf (26) zur Zuführung von Kraftstoff in die Brennkraftmaschine,
dadurch gekennzeichnet, dass
im Ventilkörper (4) ein unter Hochdruck stehendes Druckreservoir in Gestalt einer koaxial zur Führungsfläche (10) angeordneten Ringnut (32) vorgesehen ist, die über eine Verbindungsnut (34) mit dem Kraftstoffzulauf (34) in Verbindung steht. - Ventil nach Anspruch 1,
dadurch gekennzeichnet, dass
die Ringnut (32) durch einen hohlzylinderförmigen Wandabschnitt (30) von der Führungsfläche (10) des Ventilkörpers (4) getrennt ist. - Ventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
die Ringnut (32) eine Tiefe (T) aufweist, die wenigstens einem Fünftel der Führungslänge (L) entspricht. - Ventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass
eine hydraulische Verbindung zwischen einem Kraftstoffzulauf (26) eines Druckraums (22) im Ventilkörper (4) und der Ringnut (32) vorgesehen ist. - Ventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
die Ringnut (32) eine Dicke (DN) aufweist, die wenigstens einem Fünftel (1/5) des Durchmessers der Führungsfläche (10) entspricht. - Ventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass
der Wandabschnitt (30) zwischen Ventilkörper (4) und Ringnut (32) eine Dicke (DW) aufweist, die ungefähr der Dicke (DN) der Ringnut (32) entspricht.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10147792 | 2001-09-27 | ||
| DE10147792A DE10147792C2 (de) | 2001-09-27 | 2001-09-27 | Kraftstoffeinspritzventil |
| PCT/DE2002/003628 WO2003029642A1 (de) | 2001-09-27 | 2002-09-25 | Ventil, insbesondere kraftstoffeinspritzventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1430218A1 EP1430218A1 (de) | 2004-06-23 |
| EP1430218B1 true EP1430218B1 (de) | 2005-11-23 |
Family
ID=7700571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02776723A Expired - Lifetime EP1430218B1 (de) | 2001-09-27 | 2002-09-25 | Ventil, insbesondere kraftstoffeinspritzventil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7066397B2 (de) |
| EP (1) | EP1430218B1 (de) |
| JP (1) | JP2005504226A (de) |
| DE (2) | DE10147792C2 (de) |
| WO (1) | WO2003029642A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4119812B2 (ja) * | 2003-09-19 | 2008-07-16 | ボッシュ株式会社 | 燃料噴射弁 |
| JP4066959B2 (ja) * | 2004-01-27 | 2008-03-26 | 株式会社デンソー | 燃料噴射装置 |
| US8075603B2 (en) | 2008-11-14 | 2011-12-13 | Ortho Innovations, Llc | Locking polyaxial ball and socket fastener |
| US8322004B2 (en) * | 2009-04-29 | 2012-12-04 | Caterpilar Inc. | Indirect laser induced residual stress in a fuel system component and fuel system using same |
| US8205598B2 (en) * | 2010-02-08 | 2012-06-26 | International Engine Intellectual Property Company, Llc | Fuel injector nozzle |
| DE102010042688A1 (de) * | 2010-10-20 | 2012-04-26 | Robert Bosch Gmbh | Kraftstoffinjektor |
| HUE026321T2 (en) * | 2012-01-26 | 2016-05-30 | Delphi Int Operations Luxembourg Sarl | Fuel Injector Control Valve |
| WO2013162525A1 (en) * | 2012-04-24 | 2013-10-31 | International Engine Intellectual Property Company, Llc | Low leakage seat valve guide |
| EP2733344A1 (de) * | 2012-11-19 | 2014-05-21 | Caterpillar Motoren GmbH & Co. KG | Nadelführungselement |
| US9453526B2 (en) | 2013-04-30 | 2016-09-27 | Degen Medical, Inc. | Bottom-loading anchor assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1334939A (en) * | 1971-04-13 | 1973-10-24 | Barkas Werke Ifa Kom Fuer Kraf | Fuel injection nozzles for internal combustion engines |
| DE2521339A1 (de) * | 1975-05-14 | 1976-11-25 | Uraca Pumpenfabrik Gmbh | Spaltdichtung fuer die abdichtung hin- und hergehender kolben |
| JPS6187963A (ja) * | 1984-10-08 | 1986-05-06 | Kanesaka Gijutsu Kenkyusho:Kk | 燃料噴射装置 |
| US5899389A (en) * | 1997-06-02 | 1999-05-04 | Cummins Engine Company, Inc. | Two stage fuel injector nozzle assembly |
| GB9904938D0 (en) * | 1999-03-04 | 1999-04-28 | Lucas Ind Plc | Fuel injector |
| DE19914713C2 (de) * | 1999-03-31 | 2003-10-23 | Siemens Ag | Druckbeaufschlagte Stelleinrichtung |
| DE19929881A1 (de) * | 1999-06-29 | 2001-01-04 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| DE19956830C2 (de) * | 1999-11-25 | 2002-07-18 | Siemens Ag | Durchführung |
-
2001
- 2001-09-27 DE DE10147792A patent/DE10147792C2/de not_active Expired - Fee Related
-
2002
- 2002-09-25 JP JP2003532831A patent/JP2005504226A/ja not_active Withdrawn
- 2002-09-25 EP EP02776723A patent/EP1430218B1/de not_active Expired - Lifetime
- 2002-09-25 WO PCT/DE2002/003628 patent/WO2003029642A1/de not_active Ceased
- 2002-09-25 DE DE50205062T patent/DE50205062D1/de not_active Expired - Fee Related
-
2004
- 2004-03-25 US US10/809,128 patent/US7066397B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE50205062D1 (de) | 2005-12-29 |
| WO2003029642A1 (de) | 2003-04-10 |
| EP1430218A1 (de) | 2004-06-23 |
| JP2005504226A (ja) | 2005-02-10 |
| DE10147792A1 (de) | 2003-04-24 |
| DE10147792C2 (de) | 2003-10-16 |
| US7066397B2 (en) | 2006-06-27 |
| US20040195350A1 (en) | 2004-10-07 |
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