EP0054612A1 - 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
EP0054612A1
EP0054612A1 EP81106274A EP81106274A EP0054612A1 EP 0054612 A1 EP0054612 A1 EP 0054612A1 EP 81106274 A EP81106274 A EP 81106274A EP 81106274 A EP81106274 A EP 81106274A EP 0054612 A1 EP0054612 A1 EP 0054612A1
Authority
EP
European Patent Office
Prior art keywords
injection
needle
pressure
valve needle
injection nozzle
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.)
Ceased
Application number
EP81106274A
Other languages
German (de)
English (en)
Inventor
Kurt Seifert
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 EP0054612A1 publication Critical patent/EP0054612A1/fr
Ceased 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
    • F02M61/16—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
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • the auxiliary needle serves only as a trailing needle, which separates the one injection point from the other during the first stroke of the valve needle, so that the fuel can only inject from the pressure chamber via one injection point.
  • the trailing needle is then lifted off the seat, so that the second injection point is also connected to the pressure chamber for the injection.
  • the control sequence of the injection points is thus controlled as a function of the stroke, pressure waves in the fuel causing the ven tilnadel can vibrate, which can possibly lead to an undesired connection of the second injection point to the pressure chamber even with small injection quantities.
  • the fuel injection nozzle according to the invention with the characterizing features of the main claim has the advantage that the injection of large quantities via both injection points is clearly reduced in relation to the required pilot pressure of the fuel compared to the injection of small quantities via only one injection point. Since the auxiliary needle is loaded by a separate spring, its force can be chosen largely freely or can be designed according to the desired control pressure.
  • FIG. 1 show that first exemplary embodiment in which the valve needle remains on the seat for the first low fuel pressure and only the auxiliary needle is actuated
  • FIG. 2 shows the second exemplary embodiment in which the valve needle lifts off the seat even at the low fuel pressure.
  • a valve needle 2 is guided in a nozzle body 1 in a radially sealing and axially displaceable manner. Via a pressure line 3 running in the nozzle body, fuel is delivered in a pressure chamber 4 from the fuel injection pump (not shown), which acts on the valve needle 2 in the opening direction against a closing force represented by an arrow.
  • a coil spring normally serves as the closing force.
  • the valve needle 2 is designed as a hollow needle, the end of which faces the closing spring is closed by a plug 5, on which a pressure pin 6 is arranged as an abutment for a spring plate of the closing spring / which is not known therein.
  • An inner needle 7 works in the opening of the valve needle 2 facing away from this stopper 5.
  • the inner space 8 delimited by the hollow needle 2, the stopper 5 and the inner needle 7 is always connected to the pressure chamber 4 by a bore 9, so that in the pressure chamber 4 and in the interior 8 there is the same pressure.
  • the valve needle 2 has a sealing cone 10 which cooperates with a conical valve seat 11 of the nozzle body 1. This cone 11 merges into a blind hole 12 of the nozzle body 1, from which at least one first spray opening 13 branches off. At least one second spray opening 14 branches off from the seat cone 11, specifically downstream of the point at which the valve needle rests with its surface 10 on the seat 11.
  • the inner needle 7 also has a sealing cone 21 that produces, in the illustrated rest position within the nozzle body 1, a V erbin- connection between the first injection opening 13 and the two-th injection port 14 and relieves the blind hole volume. This starting position of the inner needle 7 is determined by a spring 15 which is supported on the one hand on a shoulder 16 in the inner bore of the valve needle 2 and on the other hand at least indirectly on the valve needle 7. The valve needle 7 is loaded against the direction of flow.
  • valve needle 7 in the rest position with a cone 17 g on a valve seat 18 on the valve needle 2 e-presses, whereby the first spray orifice 13 and the second injection port 14 are connected to each other within the nozzle body 1 .
  • the pressure continues into the interior 8, so that the inflowing fuel lifts the valve needle 7 from the seat 18 and up. pushes the seat 11.
  • the first spray opening 13 is separated from the second spray opening 14 and the interior 8 is connected to the second spray opening 14, so that an injection takes place via the latter.
  • the valve needle 2 As soon as the amount of fuel delivered per unit of time increases, e.g. B. at higher speed or larger flow rate, the valve needle 2 is moved against the closing spring and lifts off the valve seat 11. As a result, the pressure chamber 4 is connected directly to the spray opening 1.4. After a certain stroke h has been covered, the inner needle 7 is taken along as a dragging member by the valve needle 2 after a shoulder 19 in the interior 8 strikes a spring plate 20 of the spring 15 of the inner needle. As a result, the inner needle 7 is lifted off the seat 11 again, so that the pressure chamber 4 is also connected directly to the first spray opening 13. For reasons of sealing and functional reliability and to coordinate the point in time at which the injection takes place via openings 13 and 14, h is always greater than h 1 .
  • the inner needle 7 ' is guided in a radially sealing manner in the valve needle 2 and, like in the first example, connects the first spray opening 13' with the second spray opening 14 'in the starting position by the spring 15', within the nozzle body 1 '.
  • the valve needle 7' is first pushed onto the seat 11 'due to the pressure which continues through the bore 9' into the interior 8 ', as a result of which the spray openings 13' and 14 ' be separated from each other.
  • valve needle 2 When the pressure increases further, the valve needle 2 'then lifts off the seat 11', and the fuel under pressure passes from the pressure chamber 4 'to the second spray opening 14', via which it is injected. Only at higher pressure, for example due to higher speed or larger flow rate, the stroke h of the Ven tilnadel 2 'over the shoulder 19' of the spring plate 20 'and thus the inner needle 7 1 taken so that it lifts off the seat 11'. After the inner needle 7 'has been lifted off, the pressure chamber 4' is connected to both spray openings 13 'and 14', so that spraying is carried out via both spray openings.
  • a sliding block 22 or another fixing device prevents the inner needle 7 1 from rotating, and the stroke h 1 of the inner needle 7' is less than h, whereby also, as in the first exemplary embodiment, the point in time or opening pressure is determined from which the injection takes place via both spray openings 13 'and 14'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP81106274A 1980-12-20 1981-08-12 Buse d'injection de carburant pour moteurs à combustion interne Ceased EP0054612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803048304 DE3048304A1 (de) 1980-12-20 1980-12-20 "kraftstoffeinspritzduese fuer brennkraftmaschinen"
DE3048304 1980-12-20

Publications (1)

Publication Number Publication Date
EP0054612A1 true EP0054612A1 (fr) 1982-06-30

Family

ID=6119828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106274A Ceased EP0054612A1 (fr) 1980-12-20 1981-08-12 Buse d'injection de carburant pour moteurs à combustion interne

Country Status (4)

Country Link
US (1) US4407457A (fr)
EP (1) EP0054612A1 (fr)
JP (1) JPS57129253A (fr)
DE (1) DE3048304A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978649A3 (fr) * 1998-08-06 2003-01-29 Siemens Aktiengesellschaft Buse d'injection de combustible
EP1744051A1 (fr) * 2005-07-13 2007-01-17 Delphi Technologies, Inc. Buse d'injection
EP1744050A1 (fr) * 2005-07-13 2007-01-17 Delphi Technologies, Inc. Buse d'injection

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236046C2 (de) * 1982-09-29 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen
US5058549A (en) * 1988-02-26 1991-10-22 Toyota Jidosha Kabushiki Kaisha Fuel swirl generation type fuel injection valve and direct fuel injection type spark ignition internal combustion engine
US4974565A (en) * 1988-02-26 1990-12-04 Toyota Jidosha Kabushiki Kaisha Fuel swirl generation type fuel injection valve and direct fuel injection type spark ignition internal combustion engine mounted with the fuel injection valve
DE4214646A1 (de) * 1992-05-02 1993-11-04 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer vor- und haupteinspritzung
JP3625106B2 (ja) * 1996-07-29 2005-03-02 三菱電機株式会社 燃料噴射弁
GB9709678D0 (en) * 1997-05-14 1997-07-02 Lucas Ind Plc Fuel injector
DE69922087T2 (de) * 1998-06-24 2005-12-01 Delphi Technologies, Inc., Troy Brennstoffeinspritzdüse
GB9904938D0 (en) * 1999-03-04 1999-04-28 Lucas Ind Plc Fuel injector
GB9914644D0 (en) * 1999-06-24 1999-08-25 Lucas Ind Plc Fuel injector
DE60044626D1 (de) * 1999-10-06 2010-08-12 Delphi Tech Holding Sarl Kraftstoffeinspritzventil
DE10034444A1 (de) 2000-07-15 2002-01-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10034445A1 (de) 2000-07-15 2002-01-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10056039A1 (de) 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3578105B2 (ja) * 2001-04-12 2004-10-20 トヨタ自動車株式会社 燃料噴射装置
EP1637730B1 (fr) * 2004-09-17 2014-04-16 Delphi International Operations Luxembourg S.à r.l. Injecteur de combustible et procédé de fabrication
CN100422545C (zh) * 2004-12-15 2008-10-01 浙江飞亚电子有限公司 一种喷油嘴
DE602005024510D1 (de) * 2005-03-04 2010-12-16 Delphi Tech Holding Sarl Einspritzdüse
JP5725150B2 (ja) * 2011-02-23 2015-05-27 トヨタ自動車株式会社 燃料噴射弁
US9562505B2 (en) * 2013-06-11 2017-02-07 Cummins Inc. System and method for control of fuel injector spray
NL1041155B1 (nl) * 2015-01-23 2017-01-05 Johan Willem Maria Nooijen Paul Dualfuel injector en methodes.
DE102019103511A1 (de) * 2019-02-12 2020-08-13 Liebherr-Components Deggendorf Gmbh Düse für einen Kraftstoffinjektor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284687B (de) * 1967-10-18 1968-12-05 Bosch Gmbh Robert Kraftstoffeinspritzventil fuer Vor- und Haupteinspritzung
DE2147719A1 (de) * 1971-09-24 1973-03-29 Bosch Gmbh Robert Kraftstoffeinspritzventil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2410946A (en) * 1943-04-10 1946-11-12 Caterpillar Tractor Co Fuel injection mechanism
US3446440A (en) * 1967-06-14 1969-05-27 Int Harvester Co Double injection system with one nozzle
DE2711390A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
JPS586423B2 (ja) * 1977-06-10 1983-02-04 ケイディディ株式会社 交換台における呼の配布方式

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284687B (de) * 1967-10-18 1968-12-05 Bosch Gmbh Robert Kraftstoffeinspritzventil fuer Vor- und Haupteinspritzung
DE2147719A1 (de) * 1971-09-24 1973-03-29 Bosch Gmbh Robert Kraftstoffeinspritzventil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978649A3 (fr) * 1998-08-06 2003-01-29 Siemens Aktiengesellschaft Buse d'injection de combustible
EP1744051A1 (fr) * 2005-07-13 2007-01-17 Delphi Technologies, Inc. Buse d'injection
EP1744050A1 (fr) * 2005-07-13 2007-01-17 Delphi Technologies, Inc. Buse d'injection
US7744017B2 (en) 2005-07-13 2010-06-29 Delphi Technologies Holding S.Arl Injection nozzle
US7871021B2 (en) 2005-07-13 2011-01-18 Delphi Technologies Holding S.Arl Injection nozzle

Also Published As

Publication number Publication date
US4407457A (en) 1983-10-04
JPS57129253A (en) 1982-08-11
DE3048304A1 (de) 1982-07-29

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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: 19810812

AK Designated contracting states

Designated state(s): DE FR GB

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

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18R Application refused

Effective date: 19830823

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SEIFERT, KURT