EP1521912B1 - Buse d'injection de carburant d'un moteur a combustion interne a buse d'injection directe - Google Patents

Buse d'injection de carburant d'un moteur a combustion interne a buse d'injection directe Download PDF

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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 - Lifetime
Application number
EP03763680A
Other languages
German (de)
English (en)
Other versions
EP1521912A1 (fr
Inventor
Arnold Kaden
Christian Krüger
Oliver Steil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1521912A1 publication Critical patent/EP1521912A1/fr
Application granted granted Critical
Publication of EP1521912B1 publication Critical patent/EP1521912B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M61/04—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)

Claims (9)

  1. Buse d'injection de carburant pour un moteur à combustion interne avec une aiguille d'injection, un carter de buse comportant un siège de buse et un corps d'obturation s'ouvrant vers l'extérieur, dans laquelle le corps d'obturation déplaçable à l'aide de l'aiguille d'injection s'appuie sur une surface d'étanchéité du siège de buse dans une position de fermeture et se déplace vers l'extérieur dans une position de fonctionnement, de sorte que le carburant est introduit dans une chambre de combustion du moteur à combustion interne à travers une fente formée entre le siège de buse et le corps d'obturation sous forme d'un cône creux, caractérisée en ce qu'il est prévu au moins une cavité de turbulence dans le siège de buse et/ou le corps d'obturation dans la zone de la surface d'étanchéité.
  2. Buse d'injection de carburant selon la revendication 1, caractérisée en ce qu'il est prévu au moins une cavité de turbulence dans la surface d'étanchéité du siège de buse et dans la surface d'étanchéité du corps d'obturation, et en ce que deux cavités de turbulence sont disposées l'une en face de l'autre dans une position de fonctionnement.
  3. Buse d'injection de carburant selon la revendication 1, caractérisée en ce qu'il est prévu au moins une cavité de turbulence dans la surface d'étanchéité du siège de buse et dans la surface d'étanchéité du corps d'obturation de telle manière que deux cavités de turbulence sont décalées l'une par rapport à l'autre dans une position de fonctionnement.
  4. Buse d'injection de carburant selon la revendication 1, caractérisée en ce que deux cavités de turbulence sont disposées dans la surface d'étanchéité du siège de buse entre le siège de buse et le corps d'obturation.
  5. Buse d'injection de carburant selon la revendication 1, caractérisée en ce que deux cavités de turbulence sont disposées dans la surface d'étanchéité du corps d'obturation entre le siège de buse et le corps d'obturation.
  6. Buse d'injection de carburant selon la revendication 1, caractérisée en ce que, dans le siège de buse et dans le corps d'obturation, au moins deux cavités de turbulence dans la surface d'étanchéité du siège de buse et au moins deux cavités de turbulence dans la surface d'étanchéité du corps d'obturation sont formées l'une derrière l'autre dans une direction d'élévation le long de la surface d'étanchéité de telle manière que deux cavités de turbulence sont disposées l'une en face de l'autre dans une position de fonctionnement.
  7. Buse d'injection de carburant selon la revendication 1, caractérisée en ce que, dans le siège de buse et dans le corps d'obturation, au moins deux cavités de turbulence dans la surface d'étanchéité du siège de buse et au moins deux cavités de turbulence dans la surface d'étanchéité du corps d'obturation sont formées l'une derrière l'autre dans une direction d'élévation le long de la surface d'étanchéité de telle manière que deux cavités de turbulence sont décalées l'une par rapport à l'autre dans une position de fonctionnement.
  8. Buse d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que la cavité de turbulence disposée du côté du siège de buse et/ou du côté du corps d'obturation est conçue sous forme d'une rainure configurée vers l'intérieur le long d'une surface circonférentielle.
  9. Buse d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que le jet de carburant en forme de cône creux sortant à travers la fente formée entre le siège de buse et le corps d'obturation présente un angle compris entre 70° et 100°.
EP03763680A 2002-07-11 2003-07-01 Buse d'injection de carburant d'un moteur a combustion interne a buse d'injection directe Expired - Lifetime EP1521912B1 (fr)

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 (fr) 2002-07-11 2003-07-01 Buse d'injection de carburant d'un moteur a combustion interne a buse d'injection directe

Publications (2)

Publication Number Publication Date
EP1521912A1 EP1521912A1 (fr) 2005-04-13
EP1521912B1 true EP1521912B1 (fr) 2005-11-30

Family

ID=29796320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03763680A Expired - Lifetime EP1521912B1 (fr) 2002-07-11 2003-07-01 Buse d'injection de carburant d'un moteur a combustion interne a buse d'injection directe

Country Status (4)

Country Link
US (1) US7185832B2 (fr)
EP (1) EP1521912B1 (fr)
DE (2) DE10231583A1 (fr)
WO (1) WO2004007949A1 (fr)

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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 (fr) * 2009-09-14 2011-03-17 Continental Automotive Gmbh Module buse pour soupape d'injection, et soupape d'injection correspondante
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

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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 (fr) * 1991-08-15 1993-03-04 Yaroslavsky Zavod Toplivnoi Apparatury Procede et injecteur d'alimentation en carburant pour moteur a combustion interne
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
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AUPQ852300A0 (en) * 2000-06-30 2000-07-27 Orbital Engine Company (Australia) Proprietary Limited Shock wave injector nozzle

Also Published As

Publication number Publication date
US7185832B2 (en) 2007-03-06
WO2004007949A1 (fr) 2004-01-22
DE10231583A1 (de) 2004-01-29
DE50301820D1 (de) 2006-01-05
EP1521912A1 (fr) 2005-04-13
US20050150978A1 (en) 2005-07-14

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