EP0470348A1 - Buse d'injection de carburant pour moteurs à combustion interne - Google Patents

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

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Publication number
EP0470348A1
EP0470348A1 EP19910110219 EP91110219A EP0470348A1 EP 0470348 A1 EP0470348 A1 EP 0470348A1 EP 19910110219 EP19910110219 EP 19910110219 EP 91110219 A EP91110219 A EP 91110219A EP 0470348 A1 EP0470348 A1 EP 0470348A1
Authority
EP
European Patent Office
Prior art keywords
valve
injection nozzle
separating sleeve
nozzle body
seat
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
EP19910110219
Other languages
German (de)
English (en)
Other versions
EP0470348B1 (fr
Inventor
Karl Dipl.-Ing. Hofmann
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 EP0470348A1 publication Critical patent/EP0470348A1/fr
Application granted granted Critical
Publication of EP0470348B1 publication Critical patent/EP0470348B1/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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F2007/0097—Casings, e.g. crankcases or frames for large diesel engines
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention is based on a fuel injection nozzle for internal combustion engines according to the preamble of claim 1.
  • an injection nozzle of this type which has become known, for example, from DE-OS 27 40 880
  • the valve seats for the valve needles and the sealing seat for the separating sleeve are each formed separately from one another and partly arranged on the nozzle body and partly on the separating sleeve, which requires complex machining of the nozzle body and the nozzle needles.
  • the independently machined valve seats result in sealing difficulties due to their exact coaxial position, which is difficult to control.
  • the injection nozzle according to the invention with the characterizing features of claim 1 has the advantage that the manufacturing effort for the common valve seat of the two valve needles and the sealing seat for the separating sleeve in the nozzle body is low and that the centricity for these parts is easy to control.
  • FIG. 1 shows an injection nozzle in longitudinal section
  • FIG. 2 shows a detail 11 of the injection nozzle according to FIG. 1 on an enlarged scale
  • FIG. 3 shows a cross section of the injection nozzle in the plane 111-111 of FIG. 2.
  • a nozzle body 10 which can be fixedly connected to a nozzle holder (not shown), has in a dome 11 on the combustion chamber side spray holes 12 and 13 directed into the combustion chamber of an internal combustion engine in two axially offset hole circles for pre-injection and main injection.
  • two coaxial valve needles 15, 16 loaded by closing springs 17, 18 are displaceable, one of which 15, which controls the upper bolt circle, is designed as a hollow needle and the other, which controls the lower bolt circle, is designed as an inner needle.
  • the hollow valve needle 15 is slidably mounted with its inlet-side guide section 20 in the upper part of the nozzle body 10, is reduced in diameter via a pressure shoulder 21 in the area of a pressure chamber 22 in the nozzle body 10 and has a conical sealing surface 23 at its end.
  • the other valve needle 16 is also included its inlet-side guide section 25 is slidably mounted in an axial bore 14 in the nozzle needle 15, offset twice in diameter via a pressure shoulder 26 and a shoulder 27 and has a conical sealing surface 28 at its end.
  • the sealing surfaces 23 and 28 of the two valve needles 15, 16 interact with seat surfaces of a common conical valve seat 29 in the dome 11 of the nozzle body 10.
  • the angle of inclination of the conical valve seat 29 is constant.
  • the sealing surface of the hollow valve needle 15, which controls the main injection sits upstream of the openings of the spray holes 12 of the upper hole circle and the sealing surface 28 of the inner valve needle 16 sits upstream of the openings of the spray holes 13 of the lower hole circle on the common valve seat 29.
  • a cylindrical separation sleeve 30 is arranged in the annular gap between the shoulder 27 and the sealing surface 28 of the inner valve needle 16.
  • This separating sleeve 30 slidably abuts the wall of the axial bore 14 of the hollow valve needle 15 and is supported by a compression spring 31, which is supported by a ring 32 with transverse grooves 33 on the shoulder 27 of the inner valve needle 16, with an edge of a conical sealing surface 34 pressed against the valve seat 29 in the nozzle body 10 in the area between the two circles of holes with the spray holes 12 and 13. Since the separating sleeve 30 is acted upon by the injection pressure, a plurality of radially inwardly directed ribs 35 are arranged on its valve-side end section in order to exclude the risk of compression. The play between the ribs 35 and the inner valve needle 16 is slightly greater than the play between the outside of the separating sleeve 30 and the axial bore 14 of the hollow valve needle 15.
  • a first inlet bore 37 in the nozzle body 10 which is connected to a first injection pump for the main injection, leads to the pressure chamber 22, from which an annular gap 38 runs downstream between the nozzle body 10 and the hollow valve needle 15.
  • a second inlet bore 39 leads to an eccentric pressure chamber 40 in the nozzle body 10, in the area of which an annular groove 41 is arranged in the guide section 20 of the hollow valve needle 15.
  • Oblique bores 42 in the valve needle 15 connect the annular groove 41 to an annular gap 43 between the hollow valve needle 15 and the inner valve needle 16 downstream of the pressure shoulder 26.
EP91110219A 1990-07-21 1991-06-21 Buse d'injection de carburant pour moteurs à combustion interne Expired - Lifetime EP0470348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023223 1990-07-21
DE4023223A DE4023223A1 (de) 1990-07-21 1990-07-21 Kraftstoff-einspritzduese fuer brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0470348A1 true EP0470348A1 (fr) 1992-02-12
EP0470348B1 EP0470348B1 (fr) 1993-09-01

Family

ID=6410750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110219A Expired - Lifetime EP0470348B1 (fr) 1990-07-21 1991-06-21 Buse d'injection de carburant pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0470348B1 (fr)
JP (1) JPH04232375A (fr)
DE (2) DE4023223A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034114A1 (fr) 1997-12-29 1999-07-08 Steyr-Daimler-Puch Aktiengesellschaft Gicleur de pompe du type a injecteur ouvert
EP0878623A3 (fr) * 1997-05-14 1999-10-06 Lucas Industries Public Limited Company Injecteur de combustible
EP1069308A2 (fr) * 1999-07-14 2001-01-17 Delphi Technologies, Inc. Injecteur de combustible
WO2002090754A1 (fr) 2001-05-08 2002-11-14 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion
US6725838B2 (en) 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same
WO2004044414A1 (fr) * 2002-11-11 2004-05-27 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne
US7143964B2 (en) 2002-11-11 2006-12-05 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
EP1734250A1 (fr) * 2005-06-15 2006-12-20 Denso Corporation Injecteur de carburant

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10010863A1 (de) * 2000-03-06 2001-09-27 Bosch Gmbh Robert Einspritzdüse
DE10034446A1 (de) 2000-07-15 2002-01-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10057631A1 (de) 2000-11-21 2002-05-23 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10118699A1 (de) * 2001-04-17 2002-10-31 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung und Kraftstoffsystem für Brennkraftmaschinen, sowie Brennkraftmaschine
DE10122389A1 (de) * 2001-05-09 2002-11-21 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen
DE10348978A1 (de) 2003-10-22 2005-05-25 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung, insbesondere für eine Brennkraftmaschine mit Direkteinspritzung
DE102004060180B4 (de) * 2004-12-14 2007-04-05 Siemens Ag Düsenbaugruppe und Einspritzventil
JP2007071093A (ja) * 2005-09-07 2007-03-22 Denso Corp 燃料噴射ノズル
JP4454567B2 (ja) * 2005-11-14 2010-04-21 株式会社デンソー 燃料噴射ノズル
JP6356543B2 (ja) * 2014-09-02 2018-07-11 株式会社Ｓｏｋｅｎ 燃料噴射弁
US10392987B2 (en) 2017-03-29 2019-08-27 Cummins Emission Solutions Inc. Assembly and methods for NOx reducing reagent dosing with variable spray angle nozzle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711390A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE2740880A1 (de) * 1977-09-01 1979-03-15 Sulzer Ag Einspritzventil fuer hubkolbenbrennkraftmaschinen
DE3214040A1 (de) * 1982-04-16 1983-10-20 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzduese, insbesondere fuer einen schnellaufenden fahrzeug-dieselmotor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711390A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE2740880A1 (de) * 1977-09-01 1979-03-15 Sulzer Ag Einspritzventil fuer hubkolbenbrennkraftmaschinen
DE3214040A1 (de) * 1982-04-16 1983-10-20 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzduese, insbesondere fuer einen schnellaufenden fahrzeug-dieselmotor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878623A3 (fr) * 1997-05-14 1999-10-06 Lucas Industries Public Limited Company Injecteur de combustible
WO1999034114A1 (fr) 1997-12-29 1999-07-08 Steyr-Daimler-Puch Aktiengesellschaft Gicleur de pompe du type a injecteur ouvert
US6257507B1 (en) 1997-12-29 2001-07-10 Steyr-Daimler-Puch Aktiengesellschaft Pump nozzle of a type with an open injection nozzle
EP1069308A2 (fr) * 1999-07-14 2001-01-17 Delphi Technologies, Inc. Injecteur de combustible
EP1069308A3 (fr) * 1999-07-14 2003-04-16 Delphi Technologies, Inc. Injecteur de combustible
WO2002090754A1 (fr) 2001-05-08 2002-11-14 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs a combustion
US6725838B2 (en) 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same
USRE44082E1 (en) 2001-10-09 2013-03-19 Caterpillar Inc. Fuel injector having dual mode capabilities and engine using same
WO2004044414A1 (fr) * 2002-11-11 2004-05-27 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne
US7143964B2 (en) 2002-11-11 2006-12-05 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
US7331537B2 (en) 2002-11-11 2008-02-19 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
CN100400850C (zh) * 2002-11-11 2008-07-09 罗伯特·博世有限公司 内燃机的喷油嘴
EP1734250A1 (fr) * 2005-06-15 2006-12-20 Denso Corporation Injecteur de carburant
US7216632B2 (en) 2005-06-15 2007-05-15 Denso Corporation Fuel injection valve
US7472691B2 (en) 2005-06-15 2009-01-06 Denso Corporation Fuel injection valve

Also Published As

Publication number Publication date
DE4023223A1 (de) 1992-01-23
DE59100345D1 (de) 1993-10-07
EP0470348B1 (fr) 1993-09-01
JPH04232375A (ja) 1992-08-20

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