WO2012143267A1 - Ensemble injecteur pour soupape d'injection et soupape d'injection - Google Patents

Ensemble injecteur pour soupape d'injection et soupape d'injection Download PDF

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Publication number
WO2012143267A1
WO2012143267A1 PCT/EP2012/056504 EP2012056504W WO2012143267A1 WO 2012143267 A1 WO2012143267 A1 WO 2012143267A1 EP 2012056504 W EP2012056504 W EP 2012056504W WO 2012143267 A1 WO2012143267 A1 WO 2012143267A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
nozzle assembly
section
cross
injection opening
Prior art date
Application number
PCT/EP2012/056504
Other languages
German (de)
English (en)
Inventor
Junmei Shi
Original Assignee
Continental Automotive Gmbh
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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2012143267A1 publication Critical patent/WO2012143267A1/fr

Links

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
    • F02M61/184—Discharge orifices having non circular sections
    • 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
    • F02M61/1866—Valve seats or member ends having multiple cones
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means

Definitions

  • the invention relates to a nozzle assembly for an injection valve ⁇ injector and an injection valve.
  • a non-axial flow component at the nozzle outlet of an injection nozzle contributes to a very high degree to favorable atomization.
  • the object underlying the invention is to provide a nozzle assembly and an injection valve which allow reliable and precise operation.
  • the invention is characterized by a nozzle assembly for an injection valve with a nozzle ⁇ body having a central axis in which a nozzle body recess and at least one injection opening are arranged.
  • the nozzle body recess can be hydraulically coupled to a high pressure circuit of a fluid.
  • a nozzle needle is provided, which is arranged axially movable in the Düsenanalysisaus originallyung and has a Nadelkuppe. On a wall of the DüsenanalysisausEnglishung a sealing seat is formed and on the Nadelkuppe a seating area is ⁇ formed.
  • the seating area is operative to ⁇ together with the sealing seat, that the nozzle needle fluid flow prevented in the closed position by the at least one injection opening and releasing outside the closing position the flow of fluid through the at least one injection opening.
  • a predetermined region of the wall upstream to at least the respective injection opening A ⁇ is flatter and in such a way that an acute angle between the wall and the respective injection port is reduced.
  • the predetermined area is flatter than an area of the wall adjoining the predetermined area upstream. The provision of this flat region thus causes a very strong change of direction of the flow when the fluid flows into the injection opening, which very strongly favors the generation of vortices of the fluid flowing into the injection opening.
  • the flowing fluid has a ge ⁇ ringere kinetic energy in the axial direction of the respective injection port and a much stronger non-axial kinetic energy.
  • the ratio between length and diameter of the injection opening is low.
  • the non-axial kinetic energy is not reduced too much by arranging the flow along the injection port.
  • the respective injection opening may also be referred to as injection hole.
  • the invention is characterized by a nozzle assembly for injection valve with a nozzle body having a central axis.
  • a nozzle body recess and at least one injection opening is arranged in the nozzle body.
  • the nozzle body recess can be hydraulically coupled to a high pressure circuit of a fluid.
  • a nozzle needle is arranged axially movable in the nozzle body recess and has a Nadelkuppe.
  • On a wall of the nozzle body recess a sealing seat is formed.
  • On the Nadelkuppe a seating area is formed. The seating area cooperates with the sealing seat in such a way that the nozzle needle in the closed position prevents fluid flow through the at least one injection opening and outside the closed position prevents fluid flow through the at least one
  • the enuit injection opening has a cross section with a longitudinal axis and a transverse axis, wherein the longitudinal axis is longer than the transverse axis.
  • the ratio of the longitudinal axis to the transverse axis is in a range of about 1.1 to 3, and more preferably in a range of about 1.5 to 1.7.
  • cavitation induced by intensified turbulence thus occurs more intensively and overall the flow at the outlet of the respective injection opening then has an increased energy for the atomization and thus a significantly improved atomization of the fluid takes place and the penetration depth of the fluid into the combustion chamber is reduced.
  • Cross-section of the injection port is a retention of the respective turbulences, in particular of double vortexes, of the fluid flowing in the injection port until it exits the injection port favors. It is also particularly advantageous if the first and second aspects are combined. In this way, a particularly good atomization of the fluid at the exit from the respective injection opening can be achieved and also the penetration depth of the injection jet can be kept suitably low.
  • the cross section of the e election injection port is formed ellipsoidal. In this way a favorable influence with regard to generating strong double whirls can be promoted.
  • the cross section of the respective injection opening is formed slot-shaped. Also in this way can make an effective contribution to be made to produce a highly turbulent flow in the per ⁇ ava injection port.
  • the cross section of the respective injection opening is formed bone-shaped. Also in this way is forming a ver ⁇ swirling flow, in particular with double vortices greatly favored, which contributes to a good atomization of the emerging at the injection opening fluid.
  • the cross section of the respective injection opening is formed in the form of two intersecting circles. It has been found in this context that this form favors a particularly strong formation of vortices and indeed within the entire region of the injection opening very well.
  • the invention is characterized by an injection valve with a nozzle assembly according to the first aspect and according to a fourth aspect by an injection valve with the nozzle assembly according to the second aspect.
  • the injection valve may advantageously have a nozzle assembly according to both the first and the second aspect.
  • Figure 1 shows an injection valve in longitudinal section comprising a
  • Figure 2 is an enlarged view of a section 2 of the
  • Figure 3 is an enlarged view of a section of the
  • FIG. 2 is a diagrammatic representation of FIG. 1
  • FIG. 4A shows an enlarged view of a further detail from FIG. 2,
  • Figure 4B is an enlarged view section of the figure
  • Figure 5 shows a first embodiment of a cross-section of a guide
  • FIG. 6 shows a second embodiment of a cross section of FIG
  • FIG. 7 shows a third embodiment of the cross section of FIG.
  • FIG. 8 shows a fourth embodiment of the cross section of FIG
  • FIG. 9 shows the first embodiment of the cross section of FIG.
  • FIG. 10 shows the second embodiment of the cross section of FIG.
  • FIG. 1 shows an injection valve with a nozzle assembly 10 and an actuator 11.
  • the actuator 11 interacts functionally with the nozzle assembly 10.
  • the nozzle assembly 10 has a nozzle body 12, the actuator 11 has an in ector body 13.
  • the nozzle body 12 is fixedly coupled by means of a nozzle retaining nut 30 with the In ektorITY 13.
  • the nozzle body 12 and the injector body 13 form a common housing of the injection valve.
  • the nozzle body 12 has a nozzle body recess 14 with a central axis Z and a wall 16.
  • a nozzle needle 18 is arranged, which forms the nozzle assembly 10 together with the nozzle body 12.
  • the nozzle needle 18 has at one end a needle tip 20.
  • the nozzle needle 18 is guided in a region of the nozzle body recess 14 and biased by a nozzle spring 22.
  • injection openings 24 are preferably arranged near the needle tip 20.
  • the nozzle body 12 may consist of a sintered metal.
  • a plurality of injection openings 24 are preferably formed, which can form an injection hole circle.
  • In ektor stresses 13 has a recess in which an actuator 40 is arranged.
  • the actuator 40 is designed as a stroke ⁇ actuator.
  • the actuator 40 acts on the nozzle needle 18, so that they can perform a movement in the direction of the central axis Z.
  • the nozzle spring 22 exerts on the nozzle needle 18 a force acting in the closing direction ⁇ force, so that it prevents fluid flow through the arranged in the nozzle body 12 more injection ports 24 when no further forces acting on the nozzle needle 18.
  • the nozzle needle 18 Upon actuation of the actuator 38, the nozzle needle 18 is moved in the axial direction from its closed position to its open position, in which it releases the fluid flow through the injection openings 24.
  • FIG. 2 shows an enlarged view of a detail II of FIG. 1 in the region of the needle tip 20 and of the nozzle body 12.
  • the nozzle body 12 On the wall 16 of the nozzle body recess 14, the nozzle body 12 has a sealing seat 50.
  • the nozzle needle 18 has in the region of
  • Needle tip 20 a seating area 52 which cooperates with the sealing seat 50 of the nozzle body 12 so that the nozzle needle 18 in a closed position prevents fluid flow through the at least one injection port 24 and in an open position fluid flow through the at least one injection port 24 releases.
  • the fluid can pass from the space between the needle tip 20 and the nozzle body 12 to the injection openings 24.
  • a predetermined region 54 of the wall 16 upstream to at least the respective injection port 24 is made shallower, such that an acute angle between the wall 16 and the respective injection port 24 is reduced.
  • the predetermined area 54 is shallower than an area 56 of the wall adjoining the predefined area 54 upstream. If the wall is basically spherical, it may preferably have a larger radius in the region 54.
  • FIG. 1 A first embodiment of the cross section of the injection opening 24 with a longitudinal axis L and a transverse axis Q, wherein the longitudinal axis L is longer than the transverse axis Q, is shown in FIG.
  • the cross section of the injection port 24 is ellipsoidal in shape.
  • the cross section is formed in the form of two intersecting circles.
  • the cross section is formed slot-shaped.
  • the cross section has a bony shape.
  • the development mechanisms of the double swirls for the first and second embodiments are shown, in which the arrows indicate the course of the flow direction. The emergence of the double vertebra is so apparent.
  • FIG. 4A shows an enlarged view of a further detail from FIG. 2, and FIG. 4B shows an enlarged view of the detail from FIG. 2 in a plane vertical to a central axis of the nozzle assembly. From this, the preferred orientation of the injection openings 24 with respect to their longitudinal axis L and transverse axis Q can be seen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Abstract

La présente invention concerne un ensemble injecteur pour une soupape d'injection présentant un corps d'injecteur qui est doté d'un axe central et dans lequel sont disposés un évidement de corps d'injecteur (14) et au moins une ouverture d'injection (24). L'évidement de corps d'injecteur (14) peut être accouplé hydrauliquement à un circuit haute pression d'un fluide. Une aiguille d'injecteur (18) est montée axialement mobile dans l'évidement de corps d'injecteur (14) et présente une calotte d'aiguille (20). Sur une paroi (16) de l'évidement de corps de buse (14) est formé un siège d'étanchéité (50). Sur la calotte d'aiguille (20) est formée une zone de siège (52). La zone de siège coopère avec le siège d'étanchéité (50) de telle sorte que l'aiguille d'injecteur (18) empêche, en position fermée, l'écoulement de fluide à travers la ou les ouvertures d'injection (24) et, en dehors de la position fermée, libère l'écoulement de fluide à travers la ou les ouvertures d'injection (24). Une zone prédéfinie (54) de la paroi (16) est plate en amont jusqu'à au moins l'ouverture d'injection (24) respective, de telle sorte qu'un angle aigu est rétréci entre la paroi (16) et l'ouverture d'injection (24) respective. La zone prédéfinie (54) est plus plate qu'une zone (56) de la paroi (16) raccordée en amont à la zone prédéfinie (54). En variante ou en plus, l'ouverture d'injection (24) respective présente une section transversale dotée d'un axe longitudinal et d'un axe transversal, l'axe longitudinal étant plus long que l'axe transversal.
PCT/EP2012/056504 2011-04-21 2012-04-11 Ensemble injecteur pour soupape d'injection et soupape d'injection WO2012143267A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110007885 DE102011007885A1 (de) 2011-04-21 2011-04-21 Düsenbaugruppe für ein Einspritzventil und Einspritzventil
DE102011007885.1 2011-04-21

Publications (1)

Publication Number Publication Date
WO2012143267A1 true WO2012143267A1 (fr) 2012-10-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/056504 WO2012143267A1 (fr) 2011-04-21 2012-04-11 Ensemble injecteur pour soupape d'injection et soupape d'injection

Country Status (2)

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DE (1) DE102011007885A1 (fr)
WO (1) WO2012143267A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015172357A (ja) * 2014-03-12 2015-10-01 株式会社日本自動車部品総合研究所 燃料噴射弁
US10001100B2 (en) 2014-01-15 2018-06-19 Continental Automotive Gmbh Valve assembly and fluid injector for a combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184799A1 (fr) * 2015-12-22 2017-06-28 Continental Automotive GmbH Corps de buse pour un injecteur de fluide et injecteur de fluide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330256A1 (de) * 2003-07-04 2005-01-20 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1840368A2 (fr) * 2006-03-27 2007-10-03 Robert Bosch Gmbh Buse d'injection dotée de canaux d'injection et procédé d'introduction de canaux
DE102007000670A1 (de) * 2006-11-10 2008-05-15 Denso Corp., Kariya Fluideinspritzvorrichtung
DE102008051365A1 (de) * 2008-10-15 2010-04-29 L'orange Gmbh Kraftstoff-Einspritzventil für Brennkraftmaschinen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3156554B2 (ja) * 1995-07-24 2001-04-16 トヨタ自動車株式会社 燃料噴射弁
JP3750768B2 (ja) * 1996-10-25 2006-03-01 株式会社デンソー 流体噴射ノズル
DE102006044441A1 (de) * 2006-09-21 2008-03-27 Robert Bosch Gmbh Brennstoffeinspritzventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330256A1 (de) * 2003-07-04 2005-01-20 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1840368A2 (fr) * 2006-03-27 2007-10-03 Robert Bosch Gmbh Buse d'injection dotée de canaux d'injection et procédé d'introduction de canaux
DE102007000670A1 (de) * 2006-11-10 2008-05-15 Denso Corp., Kariya Fluideinspritzvorrichtung
DE102008051365A1 (de) * 2008-10-15 2010-04-29 L'orange Gmbh Kraftstoff-Einspritzventil für Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHRISTOPH DUMOUCHEL; JEAN COUSIN; KAELIG TRIBALLIER: "On the role of the liquid flow characteristics on low-Weber-number atomization processes", EXPERIMENTS IN FLUIDS, vol. 38, no. 5, 2005, pages 637 - 647, XP019338176, DOI: doi:10.1007/s00348-005-0944-1

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10001100B2 (en) 2014-01-15 2018-06-19 Continental Automotive Gmbh Valve assembly and fluid injector for a combustion engine
JP2015172357A (ja) * 2014-03-12 2015-10-01 株式会社日本自動車部品総合研究所 燃料噴射弁

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Publication number Publication date
DE102011007885A1 (de) 2012-10-25

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