EP1179134B1 - Einspritzdüse - Google Patents

Einspritzdüse Download PDF

Info

Publication number
EP1179134B1
EP1179134B1 EP01915037A EP01915037A EP1179134B1 EP 1179134 B1 EP1179134 B1 EP 1179134B1 EP 01915037 A EP01915037 A EP 01915037A EP 01915037 A EP01915037 A EP 01915037A EP 1179134 B1 EP1179134 B1 EP 1179134B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
injection
nozzle needle
holes
fuel
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 - Lifetime
Application number
EP01915037A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1179134A1 (de
Inventor
Achim Brenk
Wolfgang Klenk
Uwe Gordon
Manfred Mack
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 EP1179134A1 publication Critical patent/EP1179134A1/de
Application granted granted Critical
Publication of EP1179134B1 publication Critical patent/EP1179134B1/de
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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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 having a nozzle body having a first and a second group of spray holes, a first and a second nozzle needle and a separate pressure chamber for each nozzle needle, so that they independently between a closed position in which the corresponding injection needle associated injection holes are closed, and an injection position are adjustable, in which the corresponding injection holes are opened.
  • the invention also relates to a method for operating a fuel injection nozzle.
  • a fuel injection nozzle of the type mentioned is known.
  • the injection holes of a group are each arranged along a circle, with an inner circle and an outer circle concentric therewith.
  • the nozzle needle associated with the outer spray holes is designed as a hollow cylinder, and the nozzle needle associated with the inner spray holes is arranged in the interior of the hollow nozzle needle.
  • a separating sleeve is arranged, which is acted upon by a compression spring in contact with a sealing seat in the nozzle body, which is formed between the two injection hole circles.
  • the inner injection holes are used for pre-injection, while the outer injection holes are provided for main injection. In any case, the separating sleeve ensures during opening of the nozzle needles that the two groups of spray holes remain separated.
  • a disadvantage of this known construction is the comparatively high construction costs. Since the spray holes of the two groups are very close to each other, both the two nozzle needles and the separating sleeve must be accommodated in a very small space.
  • an injection valve which has a nozzle body with a first and a second group of spray holes, wherein the injection holes are opened or closed by two nozzle needles guided one inside the other.
  • the nozzle needles are controlled separately.
  • the object of the invention is to develop an injector of the type mentioned in such a way that a simpler structure is achieved. Furthermore, a flexible use of the two groups of spray holes to be made possible by a suitable control of the two nozzle needles. The object of the invention is also to provide a method for operating an injection nozzle of the type mentioned.
  • a stop chamber is provided for at least one of the nozzle needles, which is provided with a hydraulic connection.
  • a hydraulic stroke stop for the corresponding nozzle needle is created, which delimits the opening movement of the nozzle needle gentler than a conventional mechanical stroke stop.
  • a longer life of the nozzle needle is achieved.
  • the method according to claim 4 offers the advantage that any of the various injection holes can be used for both the pre- and the main injection. In this way, a Vario bin can be achieved, since by appropriate control of one of the two nozzle needles or both nozzle needles, the total cross-sectional area of the injection holes can be adapted to the respective injection. If a long time only one row of holes is operated, can be prevented by appropriate, possibly only temporary switching to the other row of holes that verkokt the other row of holes.
  • the method according to claim 4 can in principle also be used in an injection nozzle in which a separating sleeve is provided between the two nozzle needles, which facilitates the sealing between the various rows of holes.
  • the injection nozzle 10 shown in Fig. 1 has a nozzle body 12 which is provided with two groups of spray holes 14, 16.
  • the spray holes of each group are arranged along a circle with the two circles formed concentric and the circle of the first injection holes 14 surrounds the circle formed by the second injection holes 16.
  • a first nozzle needle 18 and a second nozzle needle 20 are arranged inside the nozzle body.
  • the first nozzle needle 18 has an annular cross-section, that is, it is hollow, and the second nozzle needle 20 is arranged in the interior of the first nozzle needle 18.
  • the first nozzle needle 18 cooperates with the spray holes 14 of the first group, and the second nozzle needle 20 cooperates with the spray holes 16 of the second group.
  • Each nozzle needle rests against the nozzle body 12 in such a way that, viewed in the radial direction, it is sealed on the inside and the outside of the corresponding injection hole circle
  • the first nozzle needle 18 is provided with a collar 22 which bears against the nozzle body 12, so that a pressure chamber 24 is formed. This is provided with a fuel port 26 so that the pressure chamber 24 can be pressurized.
  • a stop chamber 27 is formed, in which a compression spring 28 is arranged. This is supported on the nozzle body 12 and acts on the first nozzle needle 18 against the nozzle body 12, so that the injection holes 14 are closed.
  • the stop chamber 27 is provided with a hydraulic connection 30, by means of which the pressure prevailing in the stop chamber 27 pressure can be varied.
  • the second nozzle needle 20 is provided with a collar 32 so that a pressure chamber 34 is formed, which is provided with a fuel port 36, and a stop chamber 37, in which a compression spring 38 is arranged and which is provided with a hydraulic connection 40 ,
  • the injection nozzle 10 is connected to a fuel injection system, which has a high-pressure accumulator 42 for the fuel to be injected. From this lead supply lines 44, 46 to the fuel ports 26, 36, wherein switchable valves 48, 50 are provided, by means of which the connection from the supply lines to the fuel connections can be opened and closed. Either 312-way valves or two 212-way valves each can be used.
  • the first nozzle needle 18 When fuel is supplied to the first pressure chamber 24 via the fuel flange 26, the first nozzle needle 18 opens as soon as the opening force generated in the pressure chamber 24 is greater than the closing force generated by the compression spring 28 and optionally the pressure in the stop chamber 27. It can then be injected through the injection holes 14 fuel.
  • the hydraulic stop chamber 27 allows a gentle limitation of the opening stroke of the first nozzle needle 18, wherein this limit can be variably controlled by a switchable valve which is assigned to the hydraulic connection 30.
  • opening of the second nozzle needle 20 can be brought about by supplying fuel via the fuel connection 36.
  • the fuel present in the pressure chamber 34 is then guided through a bore 52 in the interior of the second nozzle needle 20 to the front end thereof, so that the fuel can escape through the injection holes 16.
  • an annular gap between the first nozzle needle 18 and the second nozzle needle 20 could be used, in which case a seal against the stop chamber 27 of the first nozzle needle would have to be provided.
  • the opening stroke of the second nozzle needle can be variably controlled by the hydraulic stop chamber 37 and the hydraulic port 40.
  • the spray cross-section can be freely selected. Any one of the one or the other group of spray holes 14, 16 may be used, or even both spray hole groups at the same time. For example, both the pre- and the main injection at low load by opening the injection holes of a group done while for the Full-load operation both injection-hole groups are used simultaneously for injection. Also can be switched during operation of one injection hole group to another injection hole group to avoid coking the spray holes that are currently not used.
  • outwardly opening injectors in which the use of different spray rows causes the nozzle needle must cover large strokes, the present design creates an internal injector, which allows a low choice of the spray cross section with small opening stroke of the corresponding nozzle needle with low construction costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01915037A 2000-03-06 2001-02-24 Einspritzdüse Expired - Lifetime EP1179134B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10010863 2000-03-06
DE10010863A DE10010863A1 (de) 2000-03-06 2000-03-06 Einspritzdüse
PCT/DE2001/000727 WO2001066932A1 (de) 2000-03-06 2001-02-24 Einspritzdüse

Publications (2)

Publication Number Publication Date
EP1179134A1 EP1179134A1 (de) 2002-02-13
EP1179134B1 true EP1179134B1 (de) 2007-06-06

Family

ID=7633690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01915037A Expired - Lifetime EP1179134B1 (de) 2000-03-06 2001-02-24 Einspritzdüse

Country Status (7)

Country Link
US (1) US6769634B2 (pt)
EP (1) EP1179134B1 (pt)
JP (1) JP2003526047A (pt)
BR (1) BR0104955A (pt)
DE (2) DE10010863A1 (pt)
PL (1) PL350628A1 (pt)
WO (1) WO2001066932A1 (pt)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0021296D0 (en) * 2000-08-30 2000-10-18 Ricardo Consulting Eng A dual mode fuel injector
US6725838B2 (en) * 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same
DE10163654A1 (de) * 2001-12-21 2003-07-03 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
FR2840367B1 (fr) 2002-06-04 2004-12-10 Renault Sa Injecteur de carburant pour moteur a combustion interne de vehicule automobile de type diesel
US6945475B2 (en) * 2002-12-05 2005-09-20 Caterpillar Inc Dual mode fuel injection system and fuel injector for same
DE10261175A1 (de) * 2002-12-20 2004-07-08 Daimlerchrysler Ag Schieberventil
DE10326045A1 (de) * 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen
DE10348925A1 (de) * 2003-10-18 2005-05-12 Bosch Gmbh Robert Kraftstoffinjektor mit mehrteiligem, direktgesteuertem Einspritzventilglied
DE10352504A1 (de) * 2003-11-11 2005-06-02 Robert Bosch Gmbh Einspritzdüse
DE10358861A1 (de) * 2003-12-16 2005-07-14 Robert Bosch Gmbh Einspritzdüse
DE102004015360A1 (de) * 2004-03-30 2005-10-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004057244A1 (de) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Kraftstoffeinspritzdüse
EP1693561B1 (en) * 2005-01-19 2008-03-05 Delphi Technologies, Inc. Fuel injector
US20060196974A1 (en) * 2005-03-01 2006-09-07 Caterpillar Inc. Fuel injector having a gradually restricted drain passageway
DE602006008377D1 (de) * 2005-04-28 2009-09-24 Delphi Tech Inc Einspritzdüse
EP2041424B1 (en) * 2006-07-04 2011-09-14 Renault Trucks A nozzle assembly, a fuel injector and an internal combustion engine comprising such an injector
JP4265645B2 (ja) * 2006-11-07 2009-05-20 トヨタ自動車株式会社 燃料噴射装置
JP4331225B2 (ja) * 2007-04-10 2009-09-16 トヨタ自動車株式会社 内燃機関の燃料噴射制御装置
ATE524649T1 (de) * 2007-07-06 2011-09-15 Delphi Tech Holding Sarl Doppelsprüh-einspritzdüse
US7685990B2 (en) * 2007-11-29 2010-03-30 Delphi Technologies, Inc. Dual mode combustion apparatus and method
FI124121B (fi) * 2010-12-01 2014-03-31 Wärtsilä Finland Oy Polttomoottorin ohjausmenetelmä ja polttomoottori
FI20115418A0 (fi) * 2011-05-03 2011-05-03 Waertsilae Finland Oy Polttoaineenruiskutusyksikkö ja-järjestelmä
EP2674608B1 (en) * 2012-06-13 2015-08-12 Delphi International Operations Luxembourg S.à r.l. Fuel injector
CN104533684B (zh) * 2014-11-26 2017-07-28 中国北方发动机研究所(天津) 一种双控制阀多密封带燃油喷嘴
DE102016200237B4 (de) 2016-01-12 2022-01-20 Ford Global Technologies, Llc Direkteinspritzende aufgeladene Brennkraftmaschine mit Wassereinspritzung und Verfahren zum Betreiben einer derartigen Brennkraftmaschine
NL1041770B1 (en) * 2016-03-18 2017-10-03 Cereus Tech B V Improved fuel injection devices.
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
PL443052A1 (pl) * 2022-12-05 2024-06-10 Progresja Spółka Akcyjna Dysza do hydroinżekcji

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647387B2 (pt) * 1974-08-20 1981-11-09
DE2710216A1 (de) * 1977-03-09 1978-09-14 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE3036583A1 (de) * 1980-09-27 1982-05-13 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese
JPS6036772A (ja) * 1983-08-10 1985-02-25 Diesel Kiki Co Ltd 燃料噴射弁
DE4115477C2 (de) * 1990-05-17 2003-02-06 Avl Verbrennungskraft Messtech Einspritzdüse für eine Brennkraftmaschine
DE4023223A1 (de) * 1990-07-21 1992-01-23 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4210563A1 (de) * 1991-04-15 1992-10-22 Volkswagen Ag Kraftstoffeinspritzduese fuer eine mit vor- und haupteinspritzung arbeitende brennkraftmaschine
US5458292A (en) * 1994-05-16 1995-10-17 General Electric Company Two-stage fuel injection nozzle
JPH07317624A (ja) * 1994-05-21 1995-12-05 Nippon Clean Engine Lab Co Ltd 燃料噴射弁とそれによる先行噴射燃焼方式
JPH07324661A (ja) * 1994-05-30 1995-12-12 Mitsubishi Motors Corp 直接噴射式ディーゼルエンジンの燃料噴射方法及び燃料噴射ノズル
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
GB9916464D0 (en) * 1999-07-14 1999-09-15 Lucas Ind Plc Fuel injector
GB9922408D0 (en) * 1999-09-23 1999-11-24 Lucas Ind Plc Fuel injector
US6637675B2 (en) * 2001-07-13 2003-10-28 Cummins Inc. Rate shaping fuel injector with limited throttling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE50112588D1 (de) 2007-07-19
WO2001066932A1 (de) 2001-09-13
US6769634B2 (en) 2004-08-03
US20030098371A1 (en) 2003-05-29
DE10010863A1 (de) 2001-09-27
BR0104955A (pt) 2002-02-19
PL350628A1 (en) 2003-01-27
EP1179134A1 (de) 2002-02-13
JP2003526047A (ja) 2003-09-02

Similar Documents

Publication Publication Date Title
EP1179134B1 (de) Einspritzdüse
EP1446571B1 (de) Kraftstoffeinspritzventil für brennkraftmaschinen
EP1856403B1 (de) Kraftstoffinjektor mit direktgesteuertem einspritzventilglied mit doppelsitz
DE3824467C2 (pt)
DE4115477A1 (de) Einspritzduese fuer eine brennkraftmaschine
EP3478957B1 (de) Ventil zum eindüsen von gasförmigem kraftstoff
DE19922964A1 (de) Verfahren zum Einspritzen von Kraftstoff
EP0028288A1 (de) Kraftstoffeinspritzdüse für Brennkraftmaschinen
EP3535486B1 (de) Brennstoffeinspritzventil zum einspritzen eines gasförmigen und/oder flüssigen brennstoffs
EP0657643A2 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
EP1395744B1 (de) Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, sowie kraftstoffsystem und brennkraftmaschine
DE19860678A1 (de) Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19823937B4 (de) Servoventil für Kraftstoffeinspritzventil
DE10306808A1 (de) Injektor zum Einspritzen von Kraftstoff
EP1682769B1 (de) Kraftstoffinjektor mit mehrteiligem, direktgesteuertem einspritzventilglied
EP1303695A1 (de) Brennstoffeinspritzventil
WO2001038712A2 (de) Kraftstoffeinspritzventil für brennkraftmaschinen
DE10141221B4 (de) Druck-Hub-gesteuerter Injektor für Kraftstoffeinspritzsysteme
EP1591655B1 (de) Einspritzdüse
EP2920452B1 (de) Injektor
DE19826107C2 (de) Einspritzdüse
DE10123994A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
WO1999045266A1 (de) Kraftstoffinjektor für eine brennkraftmaschine
EP1576281B1 (de) Schieberventil
DE102007009167A1 (de) Mehrwegeventil

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): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17P Request for examination filed

Effective date: 20020313

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20041020

17Q First examination report despatched

Effective date: 20041020

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

REF Corresponds to:

Ref document number: 50112588

Country of ref document: DE

Date of ref document: 20070719

Kind code of ref document: P

ET Fr: translation filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20070606

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

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070606

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070606

26N No opposition filed

Effective date: 20080307

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

Ref country code: FR

Payment date: 20100315

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111102

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: 20110228

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

Ref country code: DE

Payment date: 20120423

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50112588

Country of ref document: DE

Effective date: 20130903

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: 20130903