EP1511934B1 - Injecteur destine a l'injection de carburant - Google Patents

Injecteur destine a l'injection de carburant Download PDF

Info

Publication number
EP1511934B1
EP1511934B1 EP03756968A EP03756968A EP1511934B1 EP 1511934 B1 EP1511934 B1 EP 1511934B1 EP 03756968 A EP03756968 A EP 03756968A EP 03756968 A EP03756968 A EP 03756968A EP 1511934 B1 EP1511934 B1 EP 1511934B1
Authority
EP
European Patent Office
Prior art keywords
diameter
inlet
outlet
injector according
spray orifice
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
Application number
EP03756968A
Other languages
German (de)
English (en)
Other versions
EP1511934A1 (fr
Inventor
Andreas Fath
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1511934A1 publication Critical patent/EP1511934A1/fr
Application granted granted Critical
Publication of EP1511934B1 publication Critical patent/EP1511934B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F02M61/1846—Dimensional characteristics of discharge 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
    • F02M61/1806—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
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/007—Cleaning
    • F02M65/008—Cleaning of injectors only

Definitions

  • the present invention relates to an injector for injection of fuel in a combustion chamber of an internal combustion engine through at least one spray hole.
  • injectors for injecting fuel in a combustion chamber are injection holes, through which the fuel is injected into the combustion chamber, usually cylindrical educated. So far, here were one or two Spray holes provided. For an improved exhaust behavior To achieve the internal combustion engine has been proposed, the To manufacture injection holes of smaller diameter and at the same time increase the number of spray holes. extensive However, motor investigations have shown that when using contaminated fuel, which for example an increased concentration of co-formulants like Zinc, copper, etc. as well as their compounds contains deposits (Coking) at the outlet opening of the spray holes form. This will cause the flow through the spray holes decreases, so that the injection quantity decreases in the engine and the power of the engine thus continuously decreases. This problem occurs especially at large and maximum Load conditions where very high temperatures prevail.
  • the document DE 198 54 828 A1 discloses an injector for injecting of fuel in a combustion chamber known which at least one injection hole with an inlet opening and a Has outlet opening.
  • the injection hole cross section expands facing outward in the direction of the valve seat surface Page, d. H. towards the combustion chamber of the internal combustion engine, which makes it possible already in the injection port to generate a cavitation or turbulence, so that the Fuel jet significantly closer to the nozzle decays.
  • each injection hole with a device for the targeted generation of cavitation provided at the outlet opening to be stored in operation Remove deposits or the formation of deposits to prevent.
  • the invention is thus aware of cavitation generated, i. it will be deliberately steam bubbles at the injection hole generated by falling below the vapor pressure, which then targeted at the outlet of the injection hole, where the unwanted deposits occur to be imploded. in this connection arise at these points pressure waves of several thousand bar, whereby the spray holes freed of deposits or a deposit is prevented from the beginning.
  • a device for self-cleaning the outlet openings of the spray nozzles are provided.
  • the device for targeted production cavitation by design of the geometric dimensions the injection hole integrated into the injection hole.
  • the injection hole shape is somewhat unfavorable in terms of flow designed so that to a certain extent a targeted cavitation occurs.
  • This is a flow-related Cavitation achieved by virtue of the shape the spray hole the flow is no longer able to follow the given geometry of the injection hole, so that cavitation occurs.
  • the injection hole has on average a barrel-like shape on. Under a barrel-like shape according to the invention thereby a form understood, which is in the direction of flow first expanded and then rejuvenated. hereby can by simple geometric design of the spray hole the imploding of the cavitation bubbles to the outlet opening of the spray hole are laid to the unwanted deposits to avoid.
  • the injection hole preferably has a symmetrical Barrel shape up. More preferably, the inlet cross-sectional area the barrel-shaped injection run greater or equal the outlet cross-sectional area. Further preferred are the inlet cross-sectional area and the outlet cross-sectional area respectively circular, wherein an inlet diameter is equal to or larger than an outlet diameter.
  • the ratio of the inlet diameter to a maximum Diameter of the barrel-shaped injection hole between 0.9 and 0.95. It is at a ratio inlet diameter to maximum diameter of the barrel-shaped injection hole of 0.91 a safe prevention of deposits possible.
  • the inlet diameter is between 5 ⁇ m to 25 ⁇ m smaller than the maximum diameter of the barrel Injection port. At a difference of the inlet diameter to the maximum diameter of at least 10 microns can deposits safely prevented. Further preferred is Ratio of the inlet diameter to the outlet diameter of the barrel-shaped injection hole between 1 and 1.3, in particular at 1.1.
  • the injection hole is the ratio of the injection hole length to a mean diameter of the spray hole less than or equal 6.5.
  • the average diameter is the average Diameter over the length of the spray hole.
  • Invention can the coking tendency of the spray hole thereby be reduced, that at the outlet opening a sharp edge is formed. That is, at the outlet port no rounding of the edge is made, so that one sharp transition between the spray hole and the combustion chamber is available. This sharp transition prevents deposition co-formulants while ensuring that that cavitation bubbles occur at the injection hole edge and there can implode.
  • the present invention can be used both with injectors Seat hole nozzles (VCO) as well as injectors with blind hole nozzles be used.
  • VCO Vehicle Operator
  • injectors with blind hole nozzles be used.
  • the injection hole 1 has a symmetrical barrel shape.
  • the injection hole 1 is symmetrical both to a plane containing the center axis of the spray hole as well as in a plane imaginary by the maximum diameter D max of the injection hole 1 level.
  • the injection hole 1 has an inlet opening 2 and an outlet opening 3.
  • the diameter D A of the inlet port 2 equal to the diameter D of the outlet opening 3, wherein the openings 2, 3 are circular.
  • the injection hole 1 is in a known manner in a nozzle body 6 formed and at an injection-side end of a blind hole arranged.
  • the blind hole comprises a valve seat surface, which released by means of a valve needle or is closed to perform an injection.
  • the fuel enters the injection port at the inlet port 2 1 and flows from the outlet port 3 in a Combustion chamber 10 of an internal combustion engine a.
  • the maximum diameter D max of the injection hole 1 is arranged at half the length L / 2 of the total length L of the injection hole.
  • the ratio of the inlet diameter D Ein to the maximum diameter D max is 0.91. Since the inlet diameter D equal to the outlet diameter D A is Off, the ratio of inlet diameter to outlet diameter. 1
  • the flow direction and the deflections at the injection hole 1 of the flow are indicated by the arrows in the figure. Due to the geometric shaping of the injection hole in barrel form, a strong deflection of the flow is generated at the inlet opening 2, so that cavitation bubbles 7 are formed.
  • the inlet edge 4 of the inlet opening 2 is rounded with a predetermined radius R.
  • the resulting cavitation bubbles 7 are entrained by the flow. Due to the large pressure differences in the injection hole 1, the cavitation bubbles implode, which is indicated in the figures by the reference numeral 8.
  • the outlet opening 3 is freed from the deposits 9 occurring there.
  • a self-cleaning of the injection hole 1 is possible.
  • the inclination of the cavitation bubbles 7 for imploding at the outlet opening 3 can also be adjusted in a targeted manner by forming a sharp outlet edge 5.
  • the outlet edge 5 is formed as a sharp edge.
  • the injection hole 1 according to the second embodiment substantially corresponds to the first embodiment, with the difference that it is formed only symmetrically with respect to a plane through the center axis of the injection hole and asymmetrical with respect to a level equal to the length L / 2 of the wall thickness L of the nozzle body 6.
  • the maximum diameter D max of the barrel-shaped injection hole 1 according to the second embodiment is arranged between the inlet opening 2 and the half length L / 2 of the injection hole 1 (see FIG.
  • the ratio of the inlet diameter D Ein to the maximum diameter D max is 0.94. Further, the ratio of the inlet diameter D. A to the outlet diameter D of 1.05. Otherwise, this embodiment corresponds to the first embodiment, so that reference may be made to the description there.
  • this is between the outer surface the nozzle body 6 and the injection hole 1 at the outlet opening 3 an outlet edge 5 is formed at an angle ⁇ , so that a sharp-edged transition from the spray hole to the combustion chamber 10 results.
  • the injection hole is 1 widening in the direction of flow, more precisely conically widening, formed.

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. Injecteur destiné à l'injection de carburant dans une chambre de combustion (10) à travers au moins un trou d'injection (1) possédant une ouverture d'entrée (2) et une ouverture de sortie (3), le trou d'injection (1) présentant un dispositif destiné à la production de cavitation recherchée à l'ouverture de sortie (3) pour éliminer les dépôts (9) qui se forment au cours du fonctionnement au niveau de l'ouverture de sortie (3), dans lequel
       le dispositif destiné à la production de cavitation recherchée par une conformation géométrique spéciale de la forme du trou d'injection est intégré dans le trou d'injection,
       caractérisé en ce que le trou d'injection (1) présente en coupe une forme de tonneau qui s'élargit initialement et se rétrécit ensuite de nouveau dans le sens de l'écoulement.
  2. Injecteur selon la revendication 1, caractérisé en ce qu'une surface de section d'entrée du trou d'injection (1) en forme de tonneau est supérieure ou égale à une surface de section de sortie.
  3. Injecteur selon la revendication 1 ou 2, caractérisé en ce que le trou d'injection (1) présente une forme de tonneau symétrique.
  4. Injecteur selon la revendication 3, caractérisé en ce que la surface de la section d'entrée et la surface de la section de sortie sont circulaires et qu'un diamètre d'entrée (DEin) est égal au diamètre de sortie (DAus).
  5. Injecteur selon une des revendications 1 à 4, caractérisé en ce qu'un rapport du diamètre d'entrée (DEin) à un diamètre maximal (Dmax) du trou d'injection (1) est compris entre 0,9 et 0,95, en particulier de l'ordre de 0,91.
  6. Injecteur selon une des revendications 1 à 4, caractérisé en ce que le diamètre d'entrée (DEin) est inférieur d'entre 5 µm et 25 µm, en particulier de 10 µm, au diamètre maximal (Dmax).
  7. Injecteur selon une des revendications 2 à 6, caractérisé en ce que le rapport du diamètre d'entrée (DEin) au diamètre de sortie (DAus) est compris entre 1 et 1, 1, en particulier de l'ordre de 1,05.
  8. Injecteur selon une des revendications précédentes, caractérisé en ce que le rapport de la longueur (L) du trou d'injection à un diamètre moyen est inférieur ou égal à 6,5, le diamètre moyen étant la moyenne des diamètres sur la longueur (L) du trou d'injection (1).
  9. Injecteur selon une des revendications précédentes, caractérisé en ce qu'une arête vive (5) est formée à l'ouverture de sortie (3) tandis qu'un arrondi prédéterminé (R) est formé sur l'arête (4) de l'ouverture d'entrée (2).
EP03756968A 2002-06-10 2003-06-03 Injecteur destine a l'injection de carburant Expired - Fee Related EP1511934B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10225683 2002-06-10
DE2002125683 DE10225683A1 (de) 2002-06-10 2002-06-10 Injektor zum Einspritzen von Kraftstoff
PCT/DE2003/001879 WO2003104640A1 (fr) 2002-06-10 2003-06-03 Injecteur destine a l'injection de carburant

Publications (2)

Publication Number Publication Date
EP1511934A1 EP1511934A1 (fr) 2005-03-09
EP1511934B1 true EP1511934B1 (fr) 2005-12-07

Family

ID=29718925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03756968A Expired - Fee Related EP1511934B1 (fr) 2002-06-10 2003-06-03 Injecteur destine a l'injection de carburant

Country Status (4)

Country Link
EP (1) EP1511934B1 (fr)
JP (1) JP4288233B2 (fr)
DE (2) DE10225683A1 (fr)
WO (1) WO2003104640A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025728A2 (fr) * 2006-08-29 2008-03-06 Continental Automotive Gmbh Procédé pour réduire les dépôts dans un trou d'injection d'un dispositif d'injection de carburant
DE102008055069A1 (de) * 2008-12-22 2010-07-01 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102009009796B3 (de) * 2009-02-20 2010-10-07 L'orange Gmbh Verfahren zur Diagnose und/oder Steuerung von Brennkraftmaschinen, insbesondere Diesel-Brennkraftmaschinen
JP5392026B2 (ja) * 2009-11-24 2014-01-22 トヨタ自動車株式会社 内燃機関の制御装置
JP5830891B2 (ja) * 2011-03-25 2015-12-09 トヨタ自動車株式会社 燃料噴射弁

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2921455A1 (de) * 1979-05-26 1980-11-27 Daimler Benz Ag Kraftstoffeinspritzventil fuer luftverdichtende einspritzbrennkraftmaschinen
DE19854828A1 (de) * 1998-11-27 2000-05-31 Bosch Gmbh Robert Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen
DE10116714A1 (de) * 2001-04-04 2002-10-10 Volkswagen Ag Kraftstoffeinspritzventil für Brennkraftmaschinen, vorzugsweise für hohe Strahlgeschwindigkeiten

Also Published As

Publication number Publication date
DE50301874D1 (de) 2006-01-12
JP2005534844A (ja) 2005-11-17
JP4288233B2 (ja) 2009-07-01
WO2003104640A1 (fr) 2003-12-18
EP1511934A1 (fr) 2005-03-09
DE10225683A1 (de) 2004-01-08

Similar Documents

Publication Publication Date Title
EP0980474B1 (fr) Injecteur de carburant pour moteurs a combustion interne a auto-allumage
DE4039520B4 (de) Kraftstoff-Einspritzventil
EP1076772B1 (fr) Injecteur de carburant pour moteur a combustion interne
DE3217844A1 (de) Kraftstoffeinspritzduese fuer dieselmaschinen
EP1546547B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE19815918A1 (de) Brennstoffeinspritzvorrichtung
DE10105674A1 (de) Kraftstoffeinspritzdüse für eine Brennkraftmaschine
DE19507171C1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1511934B1 (fr) Injecteur destine a l'injection de carburant
EP1408231B1 (fr) Dispositif d'injection pour l'injection de carburant
DE10315967A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102016224084B4 (de) Kraftstoffinjektor
EP2478211B1 (fr) Module buse pour soupape d'injection, et soupape d'injection correspondante
DE102017101813A1 (de) Kraftstoffeinspritzdüse
WO2014053375A1 (fr) Ensemble de busex pour injecteur de fluide et injecteur de fluide
DE102009041028A1 (de) Düsenbaugruppe für ein Einspritzventil und Einspritzventil
WO2012084515A1 (fr) Corps de buse présentant un trou d'injection qui comporte au moins deux ouvertures d'entrée
WO2004061291A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
WO2000032928A1 (fr) Injecteur de carburant pour moteur a combustion interne a allumage automatique
EP1655483B1 (fr) Soupape pour injecter du carburant
WO2015052031A1 (fr) Corps de gicleur pour soupape d'injection et soupape d'injection
DE10351680A1 (de) Ventil für eine Kraftstoffeinspritzpumpe
EP3073107B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne et utilisation d'une soupape d'injection de carburant
EP1358403A1 (fr) Soupape d'injection de carburant pour moteur a combustion interne
WO2018153741A1 (fr) Corps de buse pour un injecteur de carburant et injecteur de carburant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20041022

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20051207

REF Corresponds to:

Ref document number: 50301874

Country of ref document: DE

Date of ref document: 20060112

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060908

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110825 AND 20110831

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20180630

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180626

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20180627

Year of fee payment: 16

Ref country code: GB

Payment date: 20180620

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50301874

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200101

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190603

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190630