[go: up one dir, main page]

EP0619426A1 - Buse d'injection de combustible pour moteurs à combustion interne - Google Patents

Buse d'injection de combustible pour moteurs à combustion interne Download PDF

Info

Publication number
EP0619426A1
EP0619426A1 EP94102949A EP94102949A EP0619426A1 EP 0619426 A1 EP0619426 A1 EP 0619426A1 EP 94102949 A EP94102949 A EP 94102949A EP 94102949 A EP94102949 A EP 94102949A EP 0619426 A1 EP0619426 A1 EP 0619426A1
Authority
EP
European Patent Office
Prior art keywords
spray hole
closing head
fuel injection
injection nozzle
inlet channel
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.)
Granted
Application number
EP94102949A
Other languages
German (de)
English (en)
Other versions
EP0619426B1 (fr
Inventor
Uwe Dipl.-Ing. Gordon (Th)
Guenter Dipl.-Ing. Lewentz (Fh)
Detlev Dr. Potz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0619426A1 publication Critical patent/EP0619426A1/fr
Application granted granted Critical
Publication of EP0619426B1 publication Critical patent/EP0619426B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/04—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
    • F02M61/042—The valves being provided with fuel passages
    • F02M61/045—The valves being provided with fuel 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
    • F02M61/04—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

Definitions

  • the invention is based on a fuel injection nozzle for internal combustion engines according to the preamble of claim 1.
  • a fuel injection nozzle for internal combustion engines according to the preamble of claim 1.
  • the relatively short injection holes designed as blind bores run in a flat cone angle in the closing head and open in The circumference of a cylindrical section of the closing head encompassed by the nozzle body.
  • the inlet channels open into the spray holes at a right angle, starting from a conical section upstream of the cylindrical section and extending at a steep angle in the closing head.
  • the fuel injection nozzle according to the invention with the characterizing features of claim 1 has the advantage that the homogenization of the flow which is already forced in the wide inflow channel which is oriented coaxially with the spray hole creates almost identical inflow conditions during the transition into the spray hole, so that a uniform velocity distribution occurs in the jet outlet cross section. and thus leads to a uniform spray pattern.
  • the conversion of the pressure energy into kinetic energy takes place directly at the relatively short spray hole, so that high-energy spray jets are formed which atomize into fine droplets in the combustion chamber. Further advantages result from the configurations of the fuel injection nozzle according to the subclaims.
  • FIG. 1 shows a fuel injection nozzle in longitudinal section
  • FIG. 2 shows a section A of the end of the fuel injection end of the fuel injection nozzle according to FIG. 1 in section on an enlarged scale
  • FIG. 3 shows section B of the spray hole area of the injection nozzle according to FIG. 2 in section on an even larger scale .
  • the fuel injection nozzle has a nozzle body 10 which is clamped to a nozzle holder 12 by means of a union nut 11.
  • a valve needle 15 is slidably mounted in the nozzle body 10 and carries a closing head 16 at the end on the combustion chamber side.
  • a ring 19 with a frustoconical valve cone 17 is fixedly fitted, which cooperates with a hollow cone-shaped valve seat 18 on the nozzle body 10.
  • the section of the closing head 16 which projects into the nozzle body 10 and is set radially opposite the valve cone is designed as a piston slide 20 which is guided in a guide section 23 of the cylinder body 22 in the nozzle body 10 which is close to the valve seat 18 and forms a pressure chamber 21.
  • At least one spray hole 25 is arranged, the mouth 26 of which lies in the jacket of the piston slide 20 and is only a little or no distance from the valve plug 17, so that its outlet cross section is continuously released from the inner edge of the valve seat 18 during the opening stroke of the closing head 16 .
  • the longitudinal axis of the spray hole 25 extends at a very obtuse angle a with respect to the axis of displacement of the valve needle 15 and the nozzle body 10. This angle a is adapted to the shape of the combustion chamber of the internal combustion engine.
  • the length 1 of the spray hole 25 is in the range of 2-4 times its width d.
  • the spray hole 25 can have a cross-section deviating therefrom, for example an oval, triangular or polygonal, depending on which cross-section is to be released during the respective opening stroke.
  • the spray hole 25 is supplied with fuel from the pressure chamber 21 through an inlet channel 27 in the lock box 16.
  • This inlet channel 27 preferably runs exactly coaxially, or alternatively only with a slight deviation from the extension axis of the spray hole 25.
  • the transition between the inlet channel 27 and the spray cross section 25 is designed such that the pressure energy is converted into kinetic energy with little loss, for example as a funnel 29.
  • its cross section is by a minimum factor larger than the actual spray cross-section.
  • the cross section of the preferably circular inlet channel 27 can also deviate from the circular cross section and have a different cross-sectional shape adapted to the spray hole 25.
  • the preferably straight inlet channel 27 can also be curved. In such an alternative, however, it is essential that its end section merging with the spray hole passes tangentially into the spray hole with only a slight curvature.
  • the closing head 16 of the exemplary embodiment of the fuel injector described above is only shown with a single spray hole 25 and a single inlet channel 27.
  • fuel injection nozzles with several spray holes are generally required, which are evenly or irregularly distributed over a circle of the closing head and which can also have the same or different spray angles.
  • the individual inlet channels can cross each other in the closing head 16.
  • the valve needle 15 is slidably mounted in a guide bore 35 in the nozzle body 10, to which a collection chamber 36 and an annular gap 37 connecting it to the pressure chamber 21 connect downstream.
  • a closing spring 40 which is arranged in a spring chamber 39 in the nozzle holder 12.
  • the closing spring 40 is supported on the nozzle body 10 via a spacer bush 41 and a slotted stop disk 42 and presses against a support ring 44 fastened at the end of the valve needle 15 via a compensating disk 43.
  • the shaft of the valve needle 15 is offset at the level of the stop disk 42, forming a stop collar 45 which, in the closed position of the valve needle 15, is at a distance h g from the stop disk 42.
  • An inlet channel 47 in the nozzle holder 12 and in the nozzle body 10 leads from the connecting piece 46 to the collecting chamber 36 in the nozzle body 10. Furthermore, a leakage oil channel 48 connects the spring chamber 39 to a connection 49.
  • the described fuel injection nozzle works as follows: In the injection pauses, the closing spring 40 presses the valve needle 15 with the valve cone 17 on the closing head 16 against the valve seat 18 on the nozzle body 10, the opening of the spray holes 30 from the wall of the nozzle body 10 surrounding the guide section 33 are covered and the sealing cone 17 lies tight against the valve seat 18.
  • a pressure builds up in the latter, which acts on the piston slide 20 of the closing head 16.
  • the valve cone 17 lifts off the valve seat 18 on the nozzle body 10, so that the mouth 26 of the spray hole 25 or the spray holes, depending on the fuel supply pressure, is continuously released from the inner edge of the valve seat 18 on the nozzle body 10.
  • the needle stroke and spray cross section each result from the balance of the force of the closing spring 40 and the hydraulic force on the piston slide 20. Due to the released spray cross section at the mouth of the spray holes 25, fuel flows in the form of bundled spray jets between the valve cone 17 and the valve seat 18 into the combustion chamber the internal combustion engine.
  • the pressure built up in the pressure chamber 28 and in the inlet channel 27 is converted into flow energy at the transition from the inlet channel 27 into the spray hole 25, so that a flow at high speed is generated in the spray hole 25.
  • the relatively wide inlet channel 27 is arranged coaxially with the spray hole 25 and thus the same conditions prevail in the entire area of the transition, in this area the flow already homogenized in the inlet channel 27 is also homogeneous in the spray hole 25, so that the spray jet emerging from the spray hole 25 has the same velocity vectors v over its cross section and thereby has a uniform jet pattern.
  • the closing spring supported by the combustion chamber gas pressure 40, pulls back the valve needle 15, the spray holes 25 being closed first and then the valve cone 17 of the closing head 16 on the valve seat 18 of the nozzle body 10 sealing again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP94102949A 1993-03-29 1994-02-28 Buse d'injection de combustible pour moteurs à combustion interne Expired - Lifetime EP0619426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4310154A DE4310154A1 (de) 1993-03-29 1993-03-29 Kraftstoff-Einspritzdüse für Brennkraftmaschinen
DE4310154 1993-03-29

Publications (2)

Publication Number Publication Date
EP0619426A1 true EP0619426A1 (fr) 1994-10-12
EP0619426B1 EP0619426B1 (fr) 1999-08-11

Family

ID=6484133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102949A Expired - Lifetime EP0619426B1 (fr) 1993-03-29 1994-02-28 Buse d'injection de combustible pour moteurs à combustion interne

Country Status (4)

Country Link
US (1) US5405088A (fr)
EP (1) EP0619426B1 (fr)
JP (1) JPH06317234A (fr)
DE (2) DE4310154A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2295648A (en) * 1994-12-01 1996-06-05 Bosch Gmbh Robert I.c.engine fuel injector
WO1997027397A1 (fr) * 1996-01-25 1997-07-31 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
GB2312926A (en) * 1996-05-09 1997-11-12 Bosch Gmbh Robert I.c. engine fuel-injection valve with outwardly opening valve member and damping of the opening stroke
EP0984159A3 (fr) * 1998-08-31 2003-01-29 Siemens Aktiengesellschaft Injecteur de carburant avec limitation de course

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5833142A (en) * 1993-08-18 1998-11-10 Orbital Engine Company (Australia) Pty. Limited Fuel injector nozzles
DE4440369A1 (de) * 1994-11-11 1996-05-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19753162A1 (de) * 1997-11-29 1999-06-02 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
GB9813743D0 (en) * 1998-06-26 1998-08-26 Lucas Ind Plc Fuel injector
US6748872B2 (en) * 2001-11-08 2004-06-15 Bombardier Motor Corporation Of America Swirl-producing fuel injection nozzle and system and method incorporating same
US20040154729A1 (en) * 2003-02-11 2004-08-12 Leboeuf William E. Method of producing a processing substrate
JP5668984B2 (ja) * 2011-05-31 2015-02-12 株式会社デンソー 燃料噴射装置
BE1020586A3 (nl) * 2012-07-18 2014-01-07 Jet Zone Bvba Een spuitmondstuk geheel.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE802968C (de) * 1948-12-30 1951-02-26 Bernhard Bischof Einspritzduese fuer Brennkraftmaschinen
DE862976C (de) * 1950-10-03 1953-01-15 Stuttgarter Motorzubehoer G M Plansitzduese mit Steuerzapfen
EP0311266A2 (fr) * 1987-10-05 1989-04-12 General Motors Corporation Injecteur du carburant avec un orifice couverts par un disque et avec ouverture amortie
WO1993004277A1 (fr) * 1991-08-15 1993-03-04 Yaroslavsky Zavod Toplivnoi Apparatury Procede et injecteur d'alimentation en carburant pour moteur a combustion interne

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197997A (en) * 1978-07-28 1980-04-15 Ford Motor Company Floating ring fuel injector valve
DE3115135A1 (de) * 1981-04-15 1982-10-28 Audi Nsu Auto Union Ag, 7107 Neckarsulm Kraftstoffeinspritzventil fuer einspritz-brennkraftmaschinen
GB2113303A (en) * 1982-01-23 1983-08-03 Lucas Ind Plc I.C. Engine fuel injection nozzle
DE3221770A1 (de) * 1982-06-09 1983-12-15 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzduese
US4693424A (en) * 1985-07-15 1987-09-15 General Motors Corporation Poppet covered orifice fuel injection nozzle
DE3719459A1 (de) * 1987-06-11 1988-12-29 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3737896A1 (de) * 1987-11-07 1989-05-18 Bosch Gmbh Robert Kraftstoff-einspritzduese, insbesondere fuer brennkraftmaschinen mit direkteinspritzung
US4958771A (en) * 1989-06-21 1990-09-25 General Motors Corporation Injection nozzle
US5127584A (en) * 1991-05-06 1992-07-07 General Motors Corporation Fuel injection nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE802968C (de) * 1948-12-30 1951-02-26 Bernhard Bischof Einspritzduese fuer Brennkraftmaschinen
DE862976C (de) * 1950-10-03 1953-01-15 Stuttgarter Motorzubehoer G M Plansitzduese mit Steuerzapfen
EP0311266A2 (fr) * 1987-10-05 1989-04-12 General Motors Corporation Injecteur du carburant avec un orifice couverts par un disque et avec ouverture amortie
WO1993004277A1 (fr) * 1991-08-15 1993-03-04 Yaroslavsky Zavod Toplivnoi Apparatury Procede et injecteur d'alimentation en carburant pour moteur a combustion interne

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2295648A (en) * 1994-12-01 1996-06-05 Bosch Gmbh Robert I.c.engine fuel injector
GB2295648B (en) * 1994-12-01 1997-02-05 Bosch Gmbh Robert Fuel-injection valve for an internal-combustion engine
US5755385A (en) * 1994-12-01 1998-05-26 Robert Bosch Gmbh Fuel-injection valve for internal combustion engines
WO1997027397A1 (fr) * 1996-01-25 1997-07-31 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion interne
GB2312926A (en) * 1996-05-09 1997-11-12 Bosch Gmbh Robert I.c. engine fuel-injection valve with outwardly opening valve member and damping of the opening stroke
GB2312926B (en) * 1996-05-09 1998-06-24 Bosch Gmbh Robert Fuel-injection valve for internal combustion engines
EP0984159A3 (fr) * 1998-08-31 2003-01-29 Siemens Aktiengesellschaft Injecteur de carburant avec limitation de course

Also Published As

Publication number Publication date
JPH06317234A (ja) 1994-11-15
DE59408599D1 (de) 1999-09-16
DE4310154A1 (de) 1994-10-06
US5405088A (en) 1995-04-11
EP0619426B1 (fr) 1999-08-11

Similar Documents

Publication Publication Date Title
DE69328185T2 (de) Vorrichtung zum mischen einer flüssigkeit mit einem gas
DE3808396C2 (de) Kraftstoffeinspritzventil
EP0656474B1 (fr) Injecteur de carburant pour moteurs à combustion interne
EP0644983B1 (fr) Injecteur de carburant pour moteurs a combustion interne
EP0484681B1 (fr) Dispositif d'injection d'un mélange de gaz et de carburant
EP0619426B1 (fr) Buse d'injection de combustible pour moteurs à combustion interne
DE2749378A1 (de) Kraftstoffeinspritzduese
DE4214646A1 (de) Kraftstoffeinspritzduese fuer vor- und haupteinspritzung
EP0551633A1 (fr) Injecteur de carburant pour moteur à combustion interne
EP1045982B1 (fr) Gicleur de carburant pour moteurs a combustion interne a auto-allumage
DE3903498A1 (de) Kraftstoffeinspritzanlage
EP0730090A2 (fr) Soupape d'injection de carburant pour moteurs à combustion interne
EP0611885A1 (fr) Soupape-injecteur à combustible pour un moteur à combustion interne
DE3705848A1 (de) Hydraulischer kreislauf einer kraftstoffeinspritzanlage
DE10100390A1 (de) Einspritzventil
DE69005435T2 (de) Turbinenmotor mit nadelinjektor.
EP0646218B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE19706661A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
WO2004040125A1 (fr) Soupape de commande d'un fluide
EP1840366B1 (fr) Injecteur de carburant
DE3105687A1 (de) "leckoellose kraftstoffeinspritzduese"
DE2825998A1 (de) Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE3506729C2 (fr)
WO1991013253A1 (fr) Dispositif d'injection d'un melange de carburant et de gaz
DE19519838C2 (de) Verfahren zur Beeinflussung der Ausrichtung von Brennstoff an einem Brennstoffeinspritzventil und Brennstoffeinspritzventil

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19950412

17Q First examination report despatched

Effective date: 19950621

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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

REF Corresponds to:

Ref document number: 59408599

Country of ref document: DE

Date of ref document: 19990916

ET Fr: translation filed
ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19991018

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

Ref country code: GB

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

Effective date: 20000228

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

Effective date: 20000228

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: 20001201

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: 20011031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050228

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: 20000229