EP1432909B1 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP1432909B1 EP1432909B1 EP02776762A EP02776762A EP1432909B1 EP 1432909 B1 EP1432909 B1 EP 1432909B1 EP 02776762 A EP02776762 A EP 02776762A EP 02776762 A EP02776762 A EP 02776762A EP 1432909 B1 EP1432909 B1 EP 1432909B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- valve
- fuel
- fuel injection
- injection
- 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
- 238000002347 injection Methods 0.000 title claims description 53
- 239000007924 injection Substances 0.000 title claims description 53
- 239000000446 fuel Substances 0.000 claims description 31
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007704 transition 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
Definitions
- the invention relates to a fuel injection valve for Internal combustion engines, in particular for those with direct injection.
- valve needle In conventional fuel injectors for injection systems of internal combustion engines, the control of the fuel injection takes place typically by means of a valve needle, which in sealingly guided a valve body of an injection valve and slidably disposed.
- the valve needle points to her Tip a valve pin seat that fits together with one Valve body seat of the valve body at least one nozzle opening to the combustion chamber of the internal combustion engine opens or closes.
- the at least one nozzle opening is typically arranged in the region of the valve body seat.
- the injector has the task to the combustion chamber of the Internal combustion engine selectively and metered to supply fuel.
- the type of fuel treatment is determined by the Injector and the course of the injection process essential affected. This in turn can burn the Significantly affect internal combustion engine.
- closed Injector when the cone of the nozzle needle on the conical Sealing surface of the nozzle body rests, is the nozzle needle centered in the nozzle body by this system.
- lifting the Nozzle needle from the conical sealing surface then tends to free
- the tip of the nozzle body projecting nozzle needle to to deviate from the exact centered position. This has to Result that the circumferential injection holes are not even be released, which in turn becomes an unbalanced Beam formation can lead to the combustion process and so that emissions can also be adversely affected.
- Document JP 2000 265 927 discloses a fuel injection valve with injection holes and a valve needle, the needle tip has a plurality of groove-shaped recesses.
- An object of the invention is a fuel injector to provide that at minimum Schadvolumen a uniform as possible spray pattern of the injection holes allows.
- a fuel injection valve is used for injection of fuel into the Combustion chamber of an internal combustion engine proposed that a Valve body with a tip with injection holes and a Valve needle which is arranged axially movable in the valve body is.
- a cone on the needle tip of the valve needle selectively gives a fuel path to the injection holes free and lock him up.
- the Needle tip of the valve needle each one injection hole having associated, groove-shaped recess.
- this fuel injection valve according to the invention can that for a favorable steering of the flow under the needle seat necessary volumes are kept to a minimum. This is achieved by using a circular instead of a circular one Groove around the needle tip only narrow grooves in the needle tip are introduced.
- each recess has a width that is at least corresponds to a diameter of an injection hole. In this way, the damage volume can be reduced to a minimum be, while still providing optimal flow deflection ensured in the direction of the spray area.
- the recesses can each have an arcuate or curved contour.
- a Such arcuate or curved contour can be easily Insert manner in the manufacturing process of the nozzle needle.
- an embodiment may provide that the recesses each have a semicircular cross-section exhibit.
- the nozzle needle has a longitudinal guide to prevent of rotational movements, so that at any time the alignment the groove opposite the respective entry into Spray hole is guaranteed.
- a longitudinal guide of Nozzle needle may preferably be formed by a tongue and groove guide be, so anytime a rotation of the nozzle needle is prevented during operation.
- a further embodiment of the invention may provide that each injection hole gets a specially adapted groove, which causes unbalanced flow conditions due to compensate for needle deflections.
- the invention consists in the solution of two counteracting one another Problems.
- For flow optimization is an additional Volume in front of the entry edges of the injection holes created an injection nozzle, wherein at the same time Damage volume in the blind hole of the nozzle is minimized.
- a fixation allows the needle relative to the nozzle body during assembly to realize the advantages of both aspects.
- FIG. 1 shows a fuel injection valve according to the invention in a schematic sectional view.
- the fuel injector 2 consists of a valve body 4 and a valve needle 6, with a needle guide 10 in the valve body 4 tight is guided.
- a blind hole 16 of the valve body 4 is a or a plurality of injection holes 20 are provided.
- the valve needle 6 has a needle tip 8 with a seat edge 18 and a valve needle seat 22. This valve needle seat 22 sits on a valve body seat 24 and thus seals the Injector 2 with the injection holes 20 from.
- the fuel passes through a fuel inlet 30 and a between the valve needle 6 and the valve body 4 lying annular pressure chamber 26 to the seat edge 18 and raised Valve needle 6 along the annular space 32 between the valve needle 6 and valve body shaft on the blind hole 16th and the injection holes 20 in the combustion chamber of the internal combustion engine.
- valve needle seat 22 and valve body seat 24 The embodiment of the needle tip 8 including valve needle seat 22 and valve body seat 24 is based on the figures 3 and 4 explained in more detail.
- Figure 2 shows a plan view of the fuel injection valve 2 according to FIG Key 34, which fits into a corresponding groove in the upper area the needle guide 10 is fitted.
- the feather key 34 engages in the correspondingly fitting guide groove 36 in the valve body. 4 a, so that an axial guidance of the valve needle 6 with low Game is guaranteed. In this way, each recess remains at the needle tip 8 each their associated injection hole 20 assigned.
- FIG. 3 shows an enlarged detail of the needle point 8 of the fuel injection valve 2 according to FIG. 1.
- the valve needle 6 has at its needle syringe 8 a first cone portion 42 with a first cone angle, in a second cone portion 44 with a slightly blunt cone angle as the first cone section 42 passes.
- the second cone portion 44 is flattened and bounded by a round end face 40.
- the transition between first cone portion 42 and second cone portion 44 at the same time represents a seat edge 18, which is a valve needle seat 22 forms.
- This valve needle seat 22 is closed Valve needle 6 on the valve body seat 24 of the valve body tip on.
- At the lower tip of the valve body a plurality of injection holes 20 are provided, in the illustrated embodiment six in number (see Figure 4).
- each associated with an injection hole 20 are and each approximately the same width as one Injection hole 20 have.
- the groove-shaped recesses 38 each have a triangular cross-section, wherein a lower edge of the recess 38 each about on the same height as a lower edge of an injection hole 20th lies. The upper edge of each recess is closer to the first Cone portion 42, so that approximates a fuel flow twist-free can run inside the groove and in the direction the injection hole 20 is directed.
- a blind hole 16 in the valve body tip It has a very small space and is closed Valve needle 6 leaves, so that only a small Damage volume in the fuel injection valve 2 according to the invention is formed.
- FIG. 4 shows a plan view from below of FIG Needle tip 8 corresponding to FIG. 3.
- the star-shaped are recognizable symmetrically arranged injection holes 20, each of which on the same longitudinal axis a recess 38 in the second Cone portion 44 of the needle tip 8 is assigned.
- the recesses 38 each have an individual contour. In this way, unbalanced spray patterns of the Fuel injection valve 2 due to example one not centrally guided or laterally deflected valve needle 6 be balanced. Preferably, such asymmetrical spray patterns are determined in experiments and considered in the formation of the recesses 38 accordingly become.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Figur 1
- ein erfindungsgemäßes Kraftstoffeinspritzventil in schematischer Schnittansicht,
- Figur 2
- eine Draufsicht auf das Kraftstoffeinspritzventil gemäß Figur 1,
- Figur 3
- einen vergrößerten Ausschnitt der Nadelspitze des Ventils gemäß Figur 1 und
- Figur 4
- eine Draufsicht von unten auf die Nadelspitze entsprechend Figur 3.
Claims (6)
- Kraftstoffeinspritzventil (2) zur Einspritzung von Kraftstoff in den Brennraum einer Brennkraftmaschine, mit einem Ventilkörper (4) mit einer Spitze mit Einspritzlöchern (20) und mit einer Ventilnadel (6), die im Ventilkörper (4) axial beweglich angeordnet ist, wobei ein Konus an der Nadelspitze (8) der Ventilnadel (6) einen Kraftstoffweg zu den Einspritzlöchern (20) selektiv freigibt und sperrt, wobei
jedem Einspritzloch (20) jeweils eine nutförmige Aussparung (38) in der Nadelspitze (8) der Ventilnadel (6) zugeordnet ist, darduch gekennzeichnet dass
jede Aussparung (38) eine Breite aufweist, die mindestens einem Durchmesser eines Einspritzlochs (20) entspricht. - Kraftstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, dass
die Aussparungen (38) jeweils eine gestufte Kontur aufweisen. - Kraftstoffeinspritzventil nach Anspruch 2,
dadurch gekennzeichnet, dass
die Aussparungen (38) jeweils einen bogenförmigen Querschnitt aufweisen. - Kraftstoffeinspritzventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass
die Düsennadel (6) eine Längsführung zur Verhinderung von Drehbewegungen aufweist. - Kraftstoffeinspritzventil nach Anspruch 4,
dadurch gekennzeichnet, dass
die Längsführung durch eine Nut-Feder-Führung gebildet ist. - Kraftstoffeinspritzventil nach Anspruch 4 oder 5,
dadurch gekennzeichnet, dass
eine Passfeder (34) in einer Nadelführung (10) der Ventilnadel (6) in eine Führungsnut (36) in einer hohlzylindrischen Führungsfläche (12) im Ventilkörper (4) eingreift.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10149277 | 2001-10-05 | ||
| DE10149277A DE10149277A1 (de) | 2001-10-05 | 2001-10-05 | Kraftstoffeinspritzventil |
| PCT/DE2002/003725 WO2003031807A1 (de) | 2001-10-05 | 2002-10-01 | Kraftstoffeinspritzventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1432909A1 EP1432909A1 (de) | 2004-06-30 |
| EP1432909B1 true EP1432909B1 (de) | 2005-12-21 |
Family
ID=7701584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02776762A Expired - Lifetime EP1432909B1 (de) | 2001-10-05 | 2002-10-01 | Kraftstoffeinspritzventil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7188790B2 (de) |
| EP (1) | EP1432909B1 (de) |
| JP (1) | JP2005504924A (de) |
| DE (2) | DE10149277A1 (de) |
| WO (1) | WO2003031807A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10240827A1 (de) * | 2002-09-04 | 2004-03-18 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschine |
| DE102004024534A1 (de) * | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| US7360722B2 (en) * | 2005-08-25 | 2008-04-22 | Caterpillar Inc. | Fuel injector with grooved check member |
| US7578450B2 (en) * | 2005-08-25 | 2009-08-25 | Caterpillar Inc. | Fuel injector with grooved check member |
| DE102008061400A1 (de) * | 2008-12-10 | 2010-06-17 | Man Diesel Se | Kraftstoff-Einspritzventil für eine Brennkraftmaschine |
| DE102009042155A1 (de) * | 2009-09-21 | 2011-04-07 | Continental Automotive Gmbh | Kraftstoff-Einspritzventil für eine Brennkraftmaschine |
| JP5838701B2 (ja) * | 2011-10-05 | 2016-01-06 | 株式会社デンソー | 燃料噴射弁 |
| JP2014194198A (ja) * | 2013-03-29 | 2014-10-09 | Nippon Soken Inc | 燃料噴射ノズル |
| CN103994004A (zh) * | 2014-05-16 | 2014-08-20 | 江苏大学 | 可移动压力室式喷油嘴 |
| DE102015001199B4 (de) * | 2015-01-31 | 2017-08-17 | L'orange Gmbh | 1Kraftstoffinjektor für den Betrieb mit Brenngas |
| US10920727B2 (en) | 2016-05-16 | 2021-02-16 | Cummins Inc. | Swirl injector plunger |
| FR3052192B1 (fr) * | 2016-06-03 | 2021-02-26 | Continental Automotive France | Dispositif pour injecter un fluide sous pression |
| US10563632B2 (en) | 2017-12-05 | 2020-02-18 | Caterpillar Inc. | Fuel injector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4203343C1 (en) * | 1992-02-06 | 1993-05-19 | Mtu Friedrichshafen Gmbh | IC engine fuel injection nozzle - has combustion chamber facing openings or spray holes coverable by peripheral closure wall parts |
| JP2000265927A (ja) * | 1999-03-16 | 2000-09-26 | Toyota Motor Corp | 燃料噴射ノズル |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1565210A (en) * | 1975-10-21 | 1980-04-16 | Lucas Industries Ltd | Fuel injection nozzles for direct injection internal combustion engine |
| DE3036583A1 (de) * | 1980-09-27 | 1982-05-13 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzduese |
| US5127584A (en) * | 1991-05-06 | 1992-07-07 | General Motors Corporation | Fuel injection nozzle |
| SG48413A1 (en) * | 1992-09-15 | 1998-04-17 | Sundholm Goeran | Nozzle |
| JPH10184495A (ja) * | 1996-12-24 | 1998-07-14 | Zexel Corp | 可変噴孔型燃料噴射ノズルによる燃料噴射制御方法 |
| JPH10252605A (ja) * | 1997-03-14 | 1998-09-22 | Toyota Autom Loom Works Ltd | ディーゼルエンジンの燃料噴射ノズル |
| GB9813476D0 (en) * | 1998-06-24 | 1998-08-19 | Lucas Ind Plc | Fuel injector |
| DE19843616B4 (de) | 1998-09-23 | 2006-07-06 | Siemens Ag | Kraftstoffeinspritzdüse |
| GB9903496D0 (en) * | 1999-02-16 | 1999-04-07 | Lucas Ind Plc | Fuel injector |
| GB9913314D0 (en) * | 1999-06-09 | 1999-08-11 | Lucas Ind Plc | Fuel injector |
| US6467702B1 (en) * | 1999-06-25 | 2002-10-22 | Delphi Technologies, Inc. | Fuel injector |
| DE10005009A1 (de) * | 2000-02-04 | 2001-08-09 | Daimler Chrysler Ag | Beeinflussung des Einspritzverlaufs und -druckes bei Common-Rail-Systemen |
| US6199539B1 (en) * | 2000-06-22 | 2001-03-13 | Detroit Diesel Corporation | Anti-rotation mechanism for a high pressure fuel supply pipe in a common rail fuel system |
| US6655612B2 (en) * | 2001-01-26 | 2003-12-02 | Siemens Automotive Corporation | Needle/armature rotation limiting feature |
| JP3882680B2 (ja) * | 2001-11-16 | 2007-02-21 | 株式会社デンソー | 燃料噴射ノズル |
-
2001
- 2001-10-05 DE DE10149277A patent/DE10149277A1/de not_active Ceased
-
2002
- 2002-10-01 EP EP02776762A patent/EP1432909B1/de not_active Expired - Lifetime
- 2002-10-01 DE DE50205375T patent/DE50205375D1/de not_active Expired - Fee Related
- 2002-10-01 WO PCT/DE2002/003725 patent/WO2003031807A1/de not_active Ceased
- 2002-10-01 JP JP2003534758A patent/JP2005504924A/ja active Pending
-
2004
- 2004-04-01 US US10/815,378 patent/US7188790B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4203343C1 (en) * | 1992-02-06 | 1993-05-19 | Mtu Friedrichshafen Gmbh | IC engine fuel injection nozzle - has combustion chamber facing openings or spray holes coverable by peripheral closure wall parts |
| JP2000265927A (ja) * | 1999-03-16 | 2000-09-26 | Toyota Motor Corp | 燃料噴射ノズル |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005504924A (ja) | 2005-02-17 |
| US20040195388A1 (en) | 2004-10-07 |
| EP1432909A1 (de) | 2004-06-30 |
| WO2003031807A1 (de) | 2003-04-17 |
| DE10149277A1 (de) | 2003-04-24 |
| US7188790B2 (en) | 2007-03-13 |
| DE50205375D1 (de) | 2006-01-26 |
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