EP0370659A1 - Kraftstoffeinspritzdüse - Google Patents

Kraftstoffeinspritzdüse Download PDF

Info

Publication number
EP0370659A1
EP0370659A1 EP89311599A EP89311599A EP0370659A1 EP 0370659 A1 EP0370659 A1 EP 0370659A1 EP 89311599 A EP89311599 A EP 89311599A EP 89311599 A EP89311599 A EP 89311599A EP 0370659 A1 EP0370659 A1 EP 0370659A1
Authority
EP
European Patent Office
Prior art keywords
orifice
fuel
seating
valve member
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.)
Granted
Application number
EP89311599A
Other languages
English (en)
French (fr)
Other versions
EP0370659B1 (de
Inventor
Clement Wang
Godfrey Greeves
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of EP0370659A1 publication Critical patent/EP0370659A1/de
Application granted granted Critical
Publication of EP0370659B1 publication Critical patent/EP0370659B1/de
Expired 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

Definitions

  • This invention relates to fuel injection nozzles for supplying fuel to compression ignition engines and comprising a valve member slidable within a bore formed in a nozzle body, a seating defined at one end of the bore, the valve member being shaped for cooperation with the seating to prevent fuel flow through an outlet orifice, the valve member when lifted from the seating allowing fuel flow through the outlet orifice from a fuel inlet.
  • Fuel injection nozzles of the aforesaid type are well known in the art and in most cases the outlet orifice extends from a small cavity known as the "sac" volume which is downstream of the seating.
  • the "sac" volume is usually formed in an integral projection or tip of the body of the nozzle and the axis of the orifice is often inclined to the axis of the nozzle body.
  • the orifice extends from the seating so that when the valve member is in the closed position the inner end of the orifice is covered by the valve member.
  • the nature of the fuel spray which develops as the fuel leaves the orifice has a bearing on the combustion of fuel in the engine combustion chamber and therefore the engine performance and the level of smoke in the engine exhaust. In some engines enhanced performance and smoke reduction may be obtained by having a more penetrating spray.
  • the object of the invention is to provide in a fuel injection nozzle of the kind specified, a convenient way of modifying the form of spray which issues from the orifice.
  • the tip 10 of a conventional inwardly opening fuel injection nozzle the tip defining a "sac" volume 11 located downstream of a frusto conical seating 12 with which can cooperate the end of a valve member 13.
  • the valve member is slidable in a bore 9 formed in a nozzle body 8 and it defines an annular area 7 against which fuel under pressure can act to lift the valve member away from the seating against the action of resilient means 6.
  • fuel under pressure can flow from a nozzle inlet 5 into the "sac" volume 11 and then through one or more orifices 14 extending through the wall of the tip 10.
  • the diameter of the orifice is constant throughout its length.
  • the fuel spray which issues from the orifice will tend to diverge but will have moderate penetration.
  • the flow of fuel as it flows through the orifice tends to contract to a smaller diameter, the contraction being termed the "vena contracta" and this contraction is shown in Figure 2 at 15.
  • the inevitable separation of the fuel from the wall of the orifice causes cavities to form in the fuel which assist the atomization of the fuel.
  • the radius RA in the region of greatest separation should lie between 0.15 and 0.75, preferably between 0.3 and 0.75 of the diameter of the orifice and ideally 0.5 of the diameter of the orifice.
  • the radius RB in the region of least separation should be up to 0.75, preferably between 0.05 and 0.2 and ideally 0.1 of the diameter of the orifice.
  • Figure 4 illustrates a nozzle in which the orifice 17 extends from the seating 18 below the seatline so that in the closed position of the valve member the entrance to the orifice is closed by the valve member.
  • the same shaping of the entrance to the orifice is effected as is the case with the example shown in Figure 3.
  • the axis of the axis is so arranged that it is at right angles to the seating then the entrance conditions will be substantially the same all the way around the seating.
  • the nozzle will tend to have a number of orifices so that whatever the angle of the orifice relative to the seating the differences in the entrance conditions will remain.
  • the nozzle shown in Figure 5 has a valve member 19 which includes an obturator 20 which is partly located within the "sac" volume.
  • the obturator has a clearance with the surface of the wall defining the "sac" volume so as to provide an annular area through which fuel can flow, the area providing a restriction to the flow of fuel at least during the initial stage of lift of the valve member.
  • the invention is also applicable to fuel injection nozzles of the so called two stage lift type as seen in Figure 4 in which at the end of the first stage of lift the annular area 21 of the flow passage within the nozzle e.g. as formed between the valve member and the seating, is less than the flow area of the orifice or orifices.
EP19890311599 1988-11-19 1989-11-09 Kraftstoffeinspritzdüse Expired EP0370659B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888827107A GB8827107D0 (en) 1988-11-19 1988-11-19 Fuel injection nozzle
GB8827107 1988-11-19

Publications (2)

Publication Number Publication Date
EP0370659A1 true EP0370659A1 (de) 1990-05-30
EP0370659B1 EP0370659B1 (de) 1992-12-30

Family

ID=10647154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890311599 Expired EP0370659B1 (de) 1988-11-19 1989-11-09 Kraftstoffeinspritzdüse

Country Status (4)

Country Link
EP (1) EP0370659B1 (de)
DE (1) DE68904172T2 (de)
ES (1) ES2037962T3 (de)
GB (1) GB8827107D0 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19507188C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19507171C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0809017A1 (de) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Zweistufige Kraftstoffeinspritzdüse für Brennkraftmaschinen
EP0890735A2 (de) 1997-07-11 1999-01-13 Robert Bosch Gmbh Kraftstoffeinspritzventil
FR2796104A1 (fr) * 1999-07-08 2001-01-12 Siemens Ag Corps d'injecteur presentant une geometrie optimale d'orifice d'injection et procede pour arrondir les aretes d'un tel orifice
WO2001004490A1 (de) * 1999-07-08 2001-01-18 Robert Bosch Gmbh Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz
WO2002063161A1 (de) * 2001-02-08 2002-08-15 Siemens Aktiengesellschaft Kraftstoffeinspritzdüse für eine brennkraftmaschine
WO2002095218A1 (de) * 2001-05-21 2002-11-28 Robert Bosch Gmbh Brennstoffeinspritzventil
WO2005064150A1 (de) * 2003-12-29 2005-07-14 Robert Bosch Gmbh Brennstoffeinspritzventil
EP1312796A3 (de) * 2001-11-15 2006-02-01 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2009276A1 (de) * 2007-06-26 2008-12-31 Delphi Technologies, Inc. Sprühlochprofil
CN104929837A (zh) * 2015-05-24 2015-09-23 北京工业大学 一种气液两态混合喷射的柴油喷油嘴
CN105332840A (zh) * 2015-10-31 2016-02-17 北京工业大学 一种利用空化射流强化实现预混燃烧的方法
EP1644636B2 (de) † 2003-07-04 2016-08-03 Robert Bosch Gmbh Kraftstoffeinspritzventil für brennkraftmaschinen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4103291B2 (ja) * 2000-03-08 2008-06-18 株式会社デンソー 燃料噴射ノズル
DE10118164B4 (de) * 2001-04-11 2007-02-08 Robert Bosch Gmbh Brennstoffeinspritzventil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611620A (en) * 1945-11-13 1948-11-02 Texaco Development Corp Improvements in or relating to the operation of internal combustion engines having airless injection of fuel
FR2335705A1 (fr) * 1975-12-20 1977-07-15 Kloeckner Humboldt Deutz Ag Injecteur de carburant
FR2352957A1 (fr) * 1976-05-26 1977-12-23 Sulzer Ag Gicleur de soupape d'injection de carburant de moteur a combustion interne
GB2170269A (en) * 1985-01-26 1986-07-30 Daimler Benz Ag I.c. engine fuel injection valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB611620A (en) * 1945-11-13 1948-11-02 Texaco Development Corp Improvements in or relating to the operation of internal combustion engines having airless injection of fuel
FR2335705A1 (fr) * 1975-12-20 1977-07-15 Kloeckner Humboldt Deutz Ag Injecteur de carburant
FR2352957A1 (fr) * 1976-05-26 1977-12-23 Sulzer Ag Gicleur de soupape d'injection de carburant de moteur a combustion interne
GB2170269A (en) * 1985-01-26 1986-07-30 Daimler Benz Ag I.c. engine fuel injection valve

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6247655B1 (en) 1995-03-02 2001-06-19 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE19507171C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0730089A1 (de) 1995-03-02 1996-09-04 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0730090A3 (de) * 1995-03-02 1996-10-16 Bosch Gmbh Robert
DE19507188C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US5875973A (en) * 1995-03-02 1999-03-02 Robert Bosch Gmbh Fuel injection valve for internal combustion engine
EP0809017A1 (de) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Zweistufige Kraftstoffeinspritzdüse für Brennkraftmaschinen
US5934571A (en) * 1996-05-22 1999-08-10 Steyr-Daimler-Puch Aktiengesellschaft Two-stage fuel-injection nozzle for internal combustion engines
EP0890735A2 (de) 1997-07-11 1999-01-13 Robert Bosch Gmbh Kraftstoffeinspritzventil
EP0890735A3 (de) * 1997-07-11 2001-10-10 Robert Bosch Gmbh Kraftstoffeinspritzventil
FR2796104A1 (fr) * 1999-07-08 2001-01-12 Siemens Ag Corps d'injecteur presentant une geometrie optimale d'orifice d'injection et procede pour arrondir les aretes d'un tel orifice
US6695230B1 (en) 1999-07-08 2004-02-24 Robert Bosch Gmbh Blind bore injection nozzle for internal combustion engines, with a rounded transition between the blind bore and the nozzle needle seat
WO2001004490A1 (de) * 1999-07-08 2001-01-18 Robert Bosch Gmbh Sackloch-einspritzdüse für brennkraftmaschinen mit abgerundetem übergang zwischen sackloch und düsennadelsitz
WO2002063161A1 (de) * 2001-02-08 2002-08-15 Siemens Aktiengesellschaft Kraftstoffeinspritzdüse für eine brennkraftmaschine
WO2002095218A1 (de) * 2001-05-21 2002-11-28 Robert Bosch Gmbh Brennstoffeinspritzventil
US7011257B2 (en) 2001-05-21 2006-03-14 Robert Bosch Gmbh Fuel injection valve
EP1312796A3 (de) * 2001-11-15 2006-02-01 Robert Bosch Gmbh Brennstoffeinspritzventil
EP1644636B2 (de) † 2003-07-04 2016-08-03 Robert Bosch Gmbh Kraftstoffeinspritzventil für brennkraftmaschinen
WO2005064150A1 (de) * 2003-12-29 2005-07-14 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2009276A1 (de) * 2007-06-26 2008-12-31 Delphi Technologies, Inc. Sprühlochprofil
CN104929837A (zh) * 2015-05-24 2015-09-23 北京工业大学 一种气液两态混合喷射的柴油喷油嘴
CN104929837B (zh) * 2015-05-24 2017-08-11 北京工业大学 一种气液两态混合喷射的柴油喷油嘴
CN105332840A (zh) * 2015-10-31 2016-02-17 北京工业大学 一种利用空化射流强化实现预混燃烧的方法

Also Published As

Publication number Publication date
DE68904172D1 (de) 1993-02-11
EP0370659B1 (de) 1992-12-30
ES2037962T3 (es) 1993-07-01
GB8827107D0 (en) 1988-12-21
DE68904172T2 (de) 1993-07-15

Similar Documents

Publication Publication Date Title
EP0370659B1 (de) Kraftstoffeinspritzdüse
US6520145B2 (en) Fuel injection valve for internal combustion engines
US5890660A (en) Fuel injection nozzle
US4540126A (en) Fuel injection nozzle
EP0468009B1 (de) Kraftstoffeinspritzdüse
JP4223077B2 (ja) 自己着火式の内燃機関のための燃料噴射ノズル
AU612038B2 (en) Improvements relating to nozzles for in-cylinder fuel injection systems
JPS60550B2 (ja) 燃料噴射ノズル
US4506833A (en) Fuel injection nozzle for an internal combustion engine
JPH07507614A (ja) 内燃機関のための燃料噴射ノズル
US6443374B1 (en) Nozzle body for a fuel injection nozzle with optimized injection hole duct geometry
US4413780A (en) Fuel injection nozzles
JP2002527678A (ja) 自己点火式の内燃機関のための燃料噴射ノズル
US6923387B2 (en) Deposit control in fuel injector nozzles
JPS5990766A (ja) 内燃機関の燃料噴射ノズル
JPH09126093A (ja) 内燃機関のための燃料噴射弁
GB2074234A (en) Multi-outlet I.C. engine fuel injector
US6247655B1 (en) Fuel injection valve for internal combustion engines
EP0460326A1 (de) Kraftstoffeinspritzdüse
US4814115A (en) Slide and pin type carburetor
US4440348A (en) Fuel injection device for diesel engines with precombustion chambers
JP2002524685A (ja) 内燃機関のための燃料噴射弁
US4591101A (en) Throttling-pintle nozzle for fuel injection in an internal-combustion engine
US6955307B2 (en) Deposit control in fuel injector nozzles
US20040188550A1 (en) Fuel injection valve

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 ES FR GB IT

17P Request for examination filed

Effective date: 19901112

17Q First examination report despatched

Effective date: 19910625

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LUCAS INDUSTRIES PUBLIC LIMITED COMPANY

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

REF Corresponds to:

Ref document number: 68904172

Country of ref document: DE

Date of ref document: 19930211

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2037962

Country of ref document: ES

Kind code of ref document: T3

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
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

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: IF02

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

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

Ref country code: GB

Payment date: 20021108

Year of fee payment: 14

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

Ref country code: ES

Payment date: 20021127

Year of fee payment: 14

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: 20031109

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

Ref country code: ES

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

Effective date: 20031110

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

Effective date: 20031109

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031110

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: 20051109

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

Ref country code: DE

Payment date: 20081107

Year of fee payment: 20

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

Ref country code: FR

Payment date: 20081112

Year of fee payment: 20