EP1521912B1 - Kraftstoffeinspritzd se einer brennkraftmaschine mit direkteinspritzduese - Google Patents
Kraftstoffeinspritzd se einer brennkraftmaschine mit direkteinspritzduese Download PDFInfo
- Publication number
- EP1521912B1 EP1521912B1 EP03763680A EP03763680A EP1521912B1 EP 1521912 B1 EP1521912 B1 EP 1521912B1 EP 03763680 A EP03763680 A EP 03763680A EP 03763680 A EP03763680 A EP 03763680A EP 1521912 B1 EP1521912 B1 EP 1521912B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing surface
- nozzle
- turbulence
- fuel
- closing body
- 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 - Fee Related
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
- F02M61/04—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
- F02M61/08—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 the valves opening in direction of fuel flow
-
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
-
- 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
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
Definitions
- the invention relates to an outwardly opening fuel injector for a direct-injection internal combustion engine, in particular a spark-ignited internal combustion engine the features of the preamble of claim 1.
- DE 100 12 970 A1 discloses a method for forming an ignitable fuel air mixture known at the fuel in at least two subsets in the Combustion chamber of the internal combustion engine is introduced, wherein the Closure body of an injection nozzle after the injection process a subset can be brought into its closed position. The fuel jet is thereby accelerated until it exits, because the nozzle opening with a curved or parabolic Outlet cross section to the outlet steadily tapered.
- the invention is therefore based on the object simple measures at the fuel injector of a direct injection Internal combustion engine, through which an improvement combustion achieved despite manufacturing tolerances can be.
- the fuel injection nozzle according to the invention is characterized by an outwardly opening closure body, a nozzle housing with a nozzle seat and a nozzle needle, wherein at the fuel injection nozzle by means of the nozzle needle movable closure body on a sealing surface of the nozzle seat during a closed position, and during a Operating position is moved outward, leaving the fuel through a formed gap between the nozzle seat and the closure body in the form of a hollow cone in a Combustion chamber of the internal combustion engine is introduced, wherein on Nozzle seat and / or on the closure body in the region of the sealing surface at least one turbulence cavity is provided.
- the turbulence increase a reinforced Breaking open the fuel lamella and thus achieving smaller drops, whereby by the smaller drops an increased evaporation and a reduction in penetration the fuel drops achieved, leaving a fuel piston wetting at a late fuel injection in the compression stroke is reduced.
- a turbulence cavity is provided such that two turbulence cavities during an operating position relative to Beam axis are arranged offset from one another. This will be as well as the atomizing properties of the fuel in the Combustion chamber amplifies, reducing the characteristics of the motor Combustion can be further improved.
- the nozzle seat and on the closure body of the fuel injector at least two turbulence cavities in or immediately before the sealing surface of the nozzle seat and at least two turbulence cavities in or immediately before the sealing surface of Closure body in a stroke direction along the sealing surface successively designed such that in each case two turbulence cavities during an operating position of the fuel injector are arranged opposite one another.
- the atomization properties of the injected Fuel droplets amplified, which through the targeted turbulence generation throughout the area of the injected Fuel jet a occurring by manufacturing tolerances Turbulence difference covers and thus an approximation the necessary spray pattern is enough.
- the am Seat and arranged on the closure body turbulence cavities be formed such that each of the two cavities during an operating position relative to the beam axis arranged offset from each other.
- the in or immediately before the sealing surface of the nozzle seat and / or in or immediately before the sealing surface of the closure body arranged turbulence cavity in the form of an inwardly formed Groove formed along a peripheral surface.
- injectors made in internal combustion engines with Ignition can be used in which the fuel as Hollow cone injected and in particular a beam-guided Burning process is present.
- the injection of the fuel such that in the end the fuel hollow cone formed a toroidal vortex is, wherein in the combustion chamber of such an internal combustion engine a Spark plug is arranged such that the electrodes of the Spark plug outside the injected hollow fuel cone lie and protrude into the formed toroidal vortex.
- a Spark plug is arranged such that the electrodes of the Spark plug outside the injected hollow fuel cone lie and protrude into the formed toroidal vortex.
- Fig. 1 shows a fuel injection nozzle 1 with a nozzle needle 2 and a closure body 5 wherein a housing 3 of the Fuel injector 1 in the combustion chamber side area a Nozzle seat 4, which in a closed position of the closure body 5 by its application to a sealing surface the fuel injector closes.
- the closure body 5 is at its upper end through the nozzle needle 2 with a not shown adjusting device connected.
- a piezoelectric actuator is used, which is under electrical Voltage expands and one according to the applied voltage Operating stroke of the closure body 5 can cause.
- the Tightness of the fuel injector is mechanically through ensures a return spring, not shown.
- Of the Closure body is by means of the nozzle needle 2 in an operating position brought, causing a gap 6 between the closure body 5 and the nozzle seat 4 sets.
- the closure body 5 is in an operating position (Open position) brought by means of a stroke direction 9, so that the fuel through the gap 6 in a combustion chamber. 8 can flow into it.
- the turbulence cavities shown in FIG. 2 7 are both in the sealing surface of the closure body. 5 as well as formed in the sealing surface of the nozzle seat 4, that the fuel jet passing through the gap 6 10 flows with a turbulence increase in the combustion chamber 8, which intensifies the decay of the fuel.
- Nozzle escaping fuel jet 10 is according to Fig. 3 injected into the combustion chamber 8 with an increased turbulence, so that small droplets when entering into form the combustion chamber 8, whereby optimal combustion of the injected fuel is achieved.
- the inventive Fuel injector is preferred in internal combustion engines used with spark ignition, in which a so-called. beam-guided combustion process is present. Accordingly, the Fuel in a stratified charge preferably in the compression stroke so injected that with the injected Hollow fuel cone a toroidal vortex in the combustion chamber. 8 is trained. In such a combustion process, a for ignition provided spark plug in the combustion chamber.
- Fig. 5 and 6 are further embodiments of the invention shown in the in the sealing surface of the closure body two turbulence cavities 7 are mounted, with which an increased turbulence of the injected fuel jet is obtained, wherein according to FIG. 6, the attached Turbulence cavities 7 are arranged in a region which is farther away from the combustion chamber than the region according to FIG Fig. 5 and 5a.
- the turbulence cavities in the Sealing surface of the nozzle seat attached so that in the Hollow fuel cone in the outer area a turbulence increase is achieved, so that for the spray-guided combustion required toroidal vortex reinforced trained becomes.
- the goal is to create a symmetrical vortex and a to achieve even distribution of fuel in the outer area so that an undesirable tilting of the formed Vertebra is prevented. Furthermore, thereby the formation strands are avoided at the end of the hollow fuel cone.
- the fuel injection nozzle is designed such that the emerging from the injection nozzle hollow fuel cone with a Beam angle between 70 ° and 100 ° is formed.
- the turbulence cavities have a depth of 30 ⁇ m both in the nozzle seat area as well as in the closure body area.
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 Schnittdarstellung einer nach außen öffnenden Kraftstoffeinspritzdüse,
- Fig. 2
- eine vergrößerte Schnittdarstellung eines ausgebildeten Spaltes zwischen dem Düsensitz und dem Verschlusskörper der Kraftstoffeinspritzdüse mit vier Turbulenzhohlräumen,
- Fig. 3
- eine vergrößerte Schnittdarstellung einer Dichtfläche im Bereich eines ausgebildeten Spaltes zwischen dem Düsensitz und dem Verschlusskörper der Kraftstoffeinspritzdüse aus Fig. 2,
- Fig. 3a
- eine vergrößerte Schnittdarstellung der in Fig. 3 gezeigten Turbulenzhohlräume,
- Fig. 4
- eine vergrößerte Schnittdarstellung der Schnittfläche im ausgebildeten Spaltbereich zwischen dem Düsensitz und dem Verschlusskörper mit versetzten Turbolenzhohlräumen,
- Fig. 4a
- eine vergrößerte Schnittdarstellung der in Fig. 4 gezeigten Turbulenzhohlräumen,
- Fig. 5
- eine vergrößerte Schnittdarstellung einer Dichtfläche im ausgebildeten Spaltbereich zwischen dem Düsensitz und dem Verschlusskörper mit zwei Turbulenzhohlräumen in der Dichtfläche des Verschlusskörpers,
- Fig. 5a
- eine vergrößerte Schnittdarstellung der in Fig. 5 gezeigten Turbulenzhohlräumen,
- Fig. 6
- eine vergrößerte Schnittdarstellung einer Dichtfläche im ausgebildeten Spaltbereich zwischen dem Düsensitz und dem Verschlusskörper mit zwei Turbulenzhohlräumen in der Dichtfläche des Verschlusskörpers,
- Fig. 6a
- eine vergrößerte Schnittdarstellung der in Fig. 6 gezeigten Turbulenzhohlräumen,
- Fig. 7
- eine vergrößerte Schnittdarstellung der Dichtfläche im ausgebildeten Spaltbereich zwischen dem Düsensitz und dem Verschlusskörper mit zwei in der Dichtfläche des Düsensitzes ausgebildeten Turbulenzhohlräumen, und
- Fig. 7a
- eine vergrößerte Schnittdarstellung der in Fig. 7 gezeigten Turbulenzhohlräumen.
Claims (9)
- Kraftstoffeinspritzdüse für eine Brennkraftmaschine mit einer Düsennadel, einem einen Düsensitz aufweisenden Düsengehäuse und einem nach außen öffnenden Verschlusskörper, bei der der mittels der Düsennadel bewegbare Verschlusskörper an einer Dichtfläche des Düsensitzes während einer Schließposition anliegt, und während einer Betriebsposition nach außen bewegt wird, so dass der Kraftstoff durch einen ausgebildeten Spalt zwischen dem Düsensitz und dem Verschlusskörper in Form eines Hohlkegels in einen Brennraum der Brennkraftmaschine eingebracht wird,
dadurch gekennzeichnet, dass am Düsensitz und/oder am Verschlusskörper im Bereich der Dichtfläche mindestens ein Turbulenzhohlraum vorgesehen ist. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass in der Dichtfläche des Düsensitzes und in der Dichtfläche des Verschlusskörpers mindesten jeweils ein Turbulenzhohlraum vorgesehen ist, dass zwei Turbulenzhohlräume während einer Betriebsposition gegenüberliegend angeordnet sind. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass in der Dichtfläche des Düsensitzes und in der Dichtfläche des Verschlusskörpers mindestens ein Turbulenzhohlraum derart vorgesehen ist, dass zwei Turbulenzhohlräume während einer Betriebsposition versetzt zueinander angeordnet sind. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass zwischen dem Düsensitz und dem Verschlusskörper zwei Turbulenzhohlräume in der Dichtfläche des Düsensitzes angeordnet sind. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass zwischen dem Düsensitz und dem Verschlusskörper zwei Turbulenzhohlräume in der Dichtfläche des Verschlusskörper angeordnet sind. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass am Düsensitz und am Verschlusskörper mindestens zwei Turbulenzhohlräume in der Dichtfläche des Düsensitzes und mindestens zwei Turbulenzhohlräume in der Dichtfläche des Verschlusskörpers in einer Hubrichtung entlang der Dichtfläche nacheinander derart ausgebildet sind, dass jeweils zwei Turbulenzhohlräume während einer Betriebsposition gegenüberliegend angeordnet sind. - Kraftstoffeinspritzdüse nach Anspruch 1,
dadurch gekennzeichnet, dass am Düsensitz und am Verschlusskörper mindestens zwei Turbulenzhohlräume in der Dichtfläche des Düsensitzes und mindestens zwei Turbulenzhohlräume in der Dichtfläche des Verschlusskörpers in einer Hubrichtung entlang der Dichtfläche nacheinander derart ausgebildet sind, dass jeweils zwei Turbulenzhohlräume während einer Betriebsposition versetzt angeordnet sind. - Kraftstoffeinspritzdüse nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der düsensitzseitig und/oder verschlusskörperseitig angeordnete Turbulenzhohlraum in Form einer nach innen ausgebildeten Nut entlang einer Umfangsfläche ausgebildet ist. - Kraftstoffeinspritzdüse nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der durch den ausgebildeten Spalt zwischen dem Düsensitz und dem Verschlusskörper austretenden Kraftstoffhohlkegelstrahl einen Strahlwinkel zwischen 70° und 100° aufweist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10231583A DE10231583A1 (de) | 2002-07-11 | 2002-07-11 | Kraftstoffeinspritzdüse einer Brennkraftmaschine mit Direkteinspritzdüse |
DE10231583 | 2002-07-11 | ||
PCT/EP2003/006985 WO2004007949A1 (de) | 2002-07-11 | 2003-07-01 | Kraftstoffeinspritzdüse einer brennkraftmaschine mit direkteinspritzdüse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1521912A1 EP1521912A1 (de) | 2005-04-13 |
EP1521912B1 true EP1521912B1 (de) | 2005-11-30 |
Family
ID=29796320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03763680A Expired - Fee Related EP1521912B1 (de) | 2002-07-11 | 2003-07-01 | Kraftstoffeinspritzd se einer brennkraftmaschine mit direkteinspritzduese |
Country Status (4)
Country | Link |
---|---|
US (1) | US7185832B2 (de) |
EP (1) | EP1521912B1 (de) |
DE (2) | DE10231583A1 (de) |
WO (1) | WO2004007949A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100422545C (zh) * | 2004-12-15 | 2008-10-01 | 浙江飞亚电子有限公司 | 一种喷油嘴 |
US7520269B2 (en) * | 2005-06-28 | 2009-04-21 | Advanced Global Equities And Intellectual Properties | Fuel injector nozzle assembly |
DE102006057425A1 (de) * | 2006-05-23 | 2007-11-29 | Robert Bosch Gmbh | Vorrichtung zur Regeneration, zur Temperaturbeaufschlagung und/oder zum Thermomanagement, zugehöriges Einspritzventil und Verfahren |
JP2009236048A (ja) * | 2008-03-27 | 2009-10-15 | Toyota Motor Corp | 内燃機関の燃料噴射弁 |
WO2011029941A1 (de) * | 2009-09-14 | 2011-03-17 | Continental Automotive Gmbh | Düsenbaugruppe für ein einspritzventil und einspritzventil |
US9062642B2 (en) | 2010-03-23 | 2015-06-23 | Cummins Inc. | Fuel injector with variable spray |
KR20120061640A (ko) * | 2010-12-03 | 2012-06-13 | 현대자동차주식회사 | 노킹 방지 장치 및 이를 제어하는 방법 |
US20140060481A1 (en) * | 2012-08-29 | 2014-03-06 | GM Global Technology Operations LLC | Method and apparatus of producing laminar flow through a fuel injection nozzle |
DE102012216141A1 (de) * | 2012-09-12 | 2014-05-15 | Ford Global Technologies, Llc | Direkteinspritzende Brennkraftmaschine mit nach außen öffnender Einspritzdüse und Verfahren zum Betreiben einer derartigen Brennkraftmaschine |
US20140175192A1 (en) * | 2012-12-21 | 2014-06-26 | Quantlogic Corporation | Mixed-mode fuel injector with a variable orifice |
US9920674B2 (en) | 2014-01-09 | 2018-03-20 | Cummins Inc. | Variable spray angle injector arrangement |
DE102014218056A1 (de) * | 2014-09-10 | 2016-03-10 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
US9840994B2 (en) * | 2015-11-04 | 2017-12-12 | Ford Global Technologies, Llc | Annulus nozzle injector with tangential fins |
US9845780B2 (en) * | 2015-11-04 | 2017-12-19 | Ford Global Technologies, Llc | Annulus nozzle injector with tangential fins |
DE102016221071B4 (de) | 2016-10-26 | 2022-05-25 | Ford Global Technologies, Llc | Injektor für eine mit einem gasförmigen Kraftstoff betriebene Brennkraftmaschine |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2263197A (en) * | 1939-03-08 | 1941-11-18 | Eisemann Magneto Corp | Fuel injection nozzle |
US2719055A (en) * | 1951-09-28 | 1955-09-27 | Borg Warner | Fuel injector nozzle |
US2753217A (en) * | 1952-11-08 | 1956-07-03 | Texas Co | Fuel injection nozzle for internal combustion engine |
US4408722A (en) * | 1981-05-29 | 1983-10-11 | General Motors Corporation | Fuel injection nozzle with grooved poppet valve |
WO1993004277A1 (en) * | 1991-08-15 | 1993-03-04 | Yaroslavsky Zavod Toplivnoi Apparatury | Method and nozzle for fuel feed to internal combustion engine |
US5522550A (en) * | 1992-06-10 | 1996-06-04 | Robert Bosch Gmbh | Injection nozzle for internal combustion engines |
DE19642653C5 (de) | 1996-10-16 | 2008-02-21 | Daimler Ag | Verfahren zur Bildung eines zündfähigen Kraftstoff/Luft-Gemisches |
DE19739905A1 (de) * | 1997-09-11 | 1999-03-18 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
GB9919424D0 (en) * | 1999-08-18 | 1999-10-20 | Lucas Industries Ltd | Fuel injector |
DE10012970B4 (de) | 2000-03-16 | 2008-06-19 | Daimler Ag | Verfahren zur Bildung eines zündfähigen Kraftstoff-Luftgemischs |
AUPQ852300A0 (en) * | 2000-06-30 | 2000-07-27 | Orbital Engine Company (Australia) Proprietary Limited | Shock wave injector nozzle |
-
2002
- 2002-07-11 DE DE10231583A patent/DE10231583A1/de not_active Withdrawn
-
2003
- 2003-07-01 DE DE50301820T patent/DE50301820D1/de not_active Expired - Lifetime
- 2003-07-01 WO PCT/EP2003/006985 patent/WO2004007949A1/de active IP Right Grant
- 2003-07-01 EP EP03763680A patent/EP1521912B1/de not_active Expired - Fee Related
-
2005
- 2005-01-10 US US11/032,316 patent/US7185832B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1521912A1 (de) | 2005-04-13 |
US20050150978A1 (en) | 2005-07-14 |
WO2004007949A1 (de) | 2004-01-22 |
DE10231583A1 (de) | 2004-01-29 |
DE50301820D1 (de) | 2006-01-05 |
US7185832B2 (en) | 2007-03-06 |
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