EP1045982B1 - Kraftstoffeinspritzdüse für selbstzündende brennkraftmaschinen - Google Patents
Kraftstoffeinspritzdüse für selbstzündende brennkraftmaschinen Download PDFInfo
- Publication number
- EP1045982B1 EP1045982B1 EP99947222A EP99947222A EP1045982B1 EP 1045982 B1 EP1045982 B1 EP 1045982B1 EP 99947222 A EP99947222 A EP 99947222A EP 99947222 A EP99947222 A EP 99947222A EP 1045982 B1 EP1045982 B1 EP 1045982B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- fuel
- fuel injection
- valve seat
- spray hole
- 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
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
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
-
- 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
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
Definitions
- the invention relates to a fuel injector for Self-igniting internal combustion engines of the genus Claim 1.
- Such fuel injectors are, for example from DE 43 03 813 C1 and from the book publication: Bosch automotive paperback 22nd edition, 1995, pages 526 ff.
- a fuel injection nozzle is known from document EP 809017 A1, the spray holes, which has a constricting area and have a widening area, these two Areas are connected by a cylindrical section. spiracles in this form, however, have the disadvantage that the implementation the fuel pressure at a speed not optimal he follows.
- a fuel injection valve is from document DE-OS 2557772 known to have injection ports through which Fuel is injected into the combustion chamber of the internal combustion engine becomes.
- the injection openings narrow from the inlet cross section to a narrowest cross section and then expand again in essentially conical up to the outlet cross section.
- the narrowest cross section is, however, arranged near the inlet opening, so that here too the disadvantage occurs that the fuel pressure is not optimal can be converted into a speed and thus an optimal one Atomization is not guaranteed.
- the object of the invention is to develop a fuel injection nozzle of the type described in the introduction in such a way that its efficiency in converting the fuel pressure into a speed of the fuel jet fed in and thereby the efficiency of the distribution of the fuel in the engine are increased.
- the fuel injection nozzle is also intended to reduce NO x and particle values.
- the spray hole cross section to the combustion chamber becomes particularly simple Way an optimal conversion of the pressure into a speed of the fuel jet and thus a high one Efficiency in the distribution of the fuel in the Internal combustion engine reached. While in the convergent Fuel injector area higher speeds will be generated in their divergent Part of creating a spray with small particles allows. This will be advantageous a shift in the range of maximum distribution away from the fuel injector due to higher Fuel jet speeds at fuel injector known from the prior art occurs through the divergent part of the Counteracted fuel injector. By an optimal Conversion of the pressure of the fuel jet into its speed also becomes the tendency to cavitation reduced.
- the smallest spray hole cross section extends in an advantageous manner in axially central area of the spray hole opening, so that the divergent and the convergent spray hole area have approximately the same axial extent.
- the Spray holes advantageously have one of the following Cross-sectional shapes on: a circular shape, one elliptical shape, a slit-like shape.
- a nozzle body 10 has a bore 12, the Reason in a crest 13 at the injection end conical valve seat surface 14 is formed.
- valve seat surface 14 from which the tip 13 penetrating spray holes 20 opening into the combustion chamber a correspondingly shaped closing cone acts 31 together at the tip of a valve needle 30.
- the of a (not shown) closing spring loaded valve needle 30 has one in the input area of the Nozzle body 10 slidably guided guide section as well as a pressure shoulder in the Diameter stepped section, at its free Walls of the closing cone 31 are formed.
- the next section the nozzle needle 30 has a smaller thickness than the width of the surrounding bore 12 so that it is a Annular gap surrounds the height in a manner known per se the pressure shoulder to one with a feed hole connected chamber (not shown) expanded is.
- the spray hole 20 has one towards the combustion chamber of the internal combustion engine after the initial narrowing expanding cross-section.
- a convergent part 21 is followed by a divergent part 22.
- the spray hole 20 in this respect has the shape of a "Laval nozzle".
- a Laval nozzle in the convergent area 21 the fuel injector at higher speeds of the fuel jet to be injected, whereas in the divergent part of the nozzle the generation of a Sprays with small particles are created.
- An unwanted one Shift the range of the maximum distribution away from the nozzle due to the higher speed the fuel injection part is thus by means of the divergent Part 22 of the fuel injector counteracted.
- the resulting "gentler" implementation the pressure of the fuel injection jet into its Speed reduces the tendency to cavitate Fuel injector.
- Such a fuel injector can be very advantageously produced by spark erosion, the variation in the cross-sectional shape of the Spray hole 20 in a simple manner by varying the Parameters voltage, current and feed rate can be manufactured.
- the cost of production such a spray hole 20 can be smaller be than conical known from the prior art Spray holes where the inlet cross section is larger than the outlet cross section. Because the entry openings in known from the prior art In many cases, additional fuel injectors hydroerosively rounded, the cost of manufacturing one with spray holes 20 described above equipped fuel injector even reduced as the time to round the entry openings reduced or the process can be omitted.
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
- Fig. 1
- eine Längsschnittdarstellung des unteren Bereichs eines erfindungsgemäßen Kraftstoffeinspritzventils und
- Fig. 2
- eine in Fig. 1 mit II bezeichnete Detailvergrößerung der in Fig. 1 dargestellten Kraftstoffeinspritzdüse.
Claims (2)
- Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen mit einem Düsenkörper (10), bei dem am einspritzseitigen Ende einer Bohrung (12) eine konische Ventilsitzfläche (14) gebildet ist, von der Spritzlöcher (20) in Form von Laval-Düsen ausgehen, und mit einer gegen eine Schließkraft entgegen der Kraftstoffströmungsrichtung öffnenden Ventilnadel (30), die in dem einspritzseitigen Ende abgewandten Eingangsbereich der Bohrung (12) verschiebbar geführt ist und an ihrem der Ventilsitzfläche (14) zugewandten Seite einen Schließkegel (31) aufweist, der mit der Ventilsitzfläche (14) zusammenwirkt, wobei sich der Spritzlochquerschnitt zum Brennraum der Brennkraftmaschine hin nach anfänglicher Verengung wieder erweitert, dadurch gekennzeichnet, dass im Spritzloch (20) der im Querschnitt kleinste Spritzlochbereich in der Mitte der axialen Spritzlocherstreckung angeordnet ist.
- Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß die Querschnittsform der Spritzlöcher (20) eine der folgenden Formen aufweist: kreisrunde Form, elliptische Form, schlitzartige Form.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19847460A DE19847460A1 (de) | 1998-10-15 | 1998-10-15 | Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen |
DE19847460 | 1998-10-15 | ||
PCT/DE1999/002204 WO2000023707A1 (de) | 1998-10-15 | 1999-07-16 | Kraftstoffeinspritzdüse für selbstzündende brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1045982A1 EP1045982A1 (de) | 2000-10-25 |
EP1045982B1 true EP1045982B1 (de) | 2004-03-24 |
Family
ID=7884510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99947222A Expired - Lifetime EP1045982B1 (de) | 1998-10-15 | 1999-07-16 | Kraftstoffeinspritzdüse für selbstzündende brennkraftmaschinen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1045982B1 (de) |
JP (1) | JP2002527678A (de) |
KR (1) | KR100627745B1 (de) |
BR (1) | BR9917602A (de) |
DE (2) | DE19847460A1 (de) |
WO (1) | WO2000023707A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10105674A1 (de) * | 2001-02-08 | 2002-08-29 | Siemens Ag | Kraftstoffeinspritzdüse für eine Brennkraftmaschine |
JP3879909B2 (ja) * | 2001-03-29 | 2007-02-14 | 株式会社デンソー | 燃料噴射装置 |
DE10124745A1 (de) * | 2001-05-21 | 2003-03-27 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10360773A1 (de) * | 2003-12-23 | 2005-07-28 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102004049280A1 (de) * | 2004-10-09 | 2006-04-13 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
KR100742202B1 (ko) * | 2005-10-13 | 2007-07-24 | 진명이십일 (주) | 인젝터의 분사노즐 구조 |
DE102006013962A1 (de) * | 2006-03-27 | 2007-10-04 | Robert Bosch Gmbh | Einspritzdüse mit Spritzkanälen sowie Verfahren zur Einbringung von Kanälen |
GB0712403D0 (en) | 2007-06-26 | 2007-08-01 | Delphi Tech Inc | A Spray Hole Profile |
DE102008051365B4 (de) | 2008-10-15 | 2010-07-01 | L'orange Gmbh | Kraftstoff-Einspritzventil für Brennkraftmaschinen |
JP5299293B2 (ja) * | 2010-01-19 | 2013-09-25 | 株式会社デンソー | 燃料噴射弁およびその製造方法 |
AT511880B1 (de) * | 2011-09-06 | 2013-12-15 | Bosch Gmbh Robert | Verschleissoptimierte herstellung von konischen spritzlöchern |
EP2884090B1 (de) | 2013-12-11 | 2018-02-21 | Continental Automotive GmbH | Düsenkörper und Kraftstoffeinspritzventil |
JP6247167B2 (ja) * | 2014-06-24 | 2017-12-13 | トヨタ自動車株式会社 | 燃料噴射弁の加工方法 |
JP2017106418A (ja) * | 2015-12-11 | 2017-06-15 | 株式会社デンソー | 燃料噴射弁及びその製造方法 |
CN110805513B (zh) * | 2018-08-05 | 2021-06-01 | 大连理工大学 | 一种带扭转式椭圆形喷孔的喷嘴 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE631135C (de) * | 1934-08-19 | 1936-06-12 | Wanderer Werke Vorm Winklhofer | Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen |
DE2557772A1 (de) * | 1975-12-20 | 1977-06-23 | Kloeckner Humboldt Deutz Ag | Brennstoffeinspritzventil |
JPH05231273A (ja) * | 1992-02-19 | 1993-09-07 | Hino Motors Ltd | 燃料噴射ノズル及びその製造方法 |
EP0809017A1 (de) * | 1996-05-22 | 1997-11-26 | Steyr-Daimler-Puch Aktiengesellschaft | Zweistufige Kraftstoffeinspritzdüse für Brennkraftmaschinen |
-
1998
- 1998-10-15 DE DE19847460A patent/DE19847460A1/de not_active Withdrawn
-
1999
- 1999-07-16 EP EP99947222A patent/EP1045982B1/de not_active Expired - Lifetime
- 1999-07-16 KR KR1020007006475A patent/KR100627745B1/ko not_active IP Right Cessation
- 1999-07-16 JP JP2000577405A patent/JP2002527678A/ja active Pending
- 1999-07-16 DE DE59908951T patent/DE59908951D1/de not_active Expired - Lifetime
- 1999-07-16 WO PCT/DE1999/002204 patent/WO2000023707A1/de active IP Right Grant
- 1999-07-16 BR BR9917602-5A patent/BR9917602A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2002527678A (ja) | 2002-08-27 |
DE59908951D1 (de) | 2004-04-29 |
EP1045982A1 (de) | 2000-10-25 |
KR100627745B1 (ko) | 2006-09-26 |
BR9917602A (pt) | 2002-10-01 |
KR20010033112A (ko) | 2001-04-25 |
DE19847460A1 (de) | 2000-04-20 |
WO2000023707A1 (de) | 2000-04-27 |
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