EP1163442B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
EP1163442B1
EP1163442B1 EP01903592A EP01903592A EP1163442B1 EP 1163442 B1 EP1163442 B1 EP 1163442B1 EP 01903592 A EP01903592 A EP 01903592A EP 01903592 A EP01903592 A EP 01903592A EP 1163442 B1 EP1163442 B1 EP 1163442B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
injection nozzle
sealing seat
injection
circumferential groove
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
EP01903592A
Other languages
German (de)
English (en)
Other versions
EP1163442A1 (fr
Inventor
Katsuoki Itoh
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 EP1163442A1 publication Critical patent/EP1163442A1/fr
Application granted granted Critical
Publication of EP1163442B1 publication Critical patent/EP1163442B1/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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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

Definitions

  • the invention relates to a fuel injector with a nozzle body, with is provided at least one injection hole and a conical bearing surface, and a nozzle needle slidable in the nozzle body and an inlet surface has downstream and downstream of the inlet surface a radial Paragraph, so that at the transition to the inlet surface a sealing seat is formed, which can interact with the contact surface
  • Such a fuel injection nozzle is known from DE 195 47 423 A1.
  • a depth of the order of 0 01 to 0.06 mm is executed, serves a sharp-edged Querschmttsübergang To produce in the region of the sealing seat, so that when the nozzle needle is open resulting flow area is defined as precisely as possible.
  • make up the areas downstream of the paragraph downstream of the nozzle needle at a small opening stroke, as he made for a Voreinspntzung is, a comparatively long flow channel, which acts as a throttle and at the inevitable manufacturing tolerances have a big impact on the Have flow.
  • Spattgeometne one Temperature-dependent laminar flow from what the flow behavior in addition impaired.
  • a fuel injector according to the preamble of Claim 1 is known from US-A-5 890 660.
  • the object of the invention is then an injection nozzle of the aforementioned Art to further develop that even with the smallest opening strokes a reliable dosage of the amount of fuel to be injected is possible, as is necessary for a pilot injection.
  • a fuel injection nozzle of the type mentioned, which features having the characterizing part of claim 1, has the advantage that due to the circumferential groove such a large flow area downstream is formed of the sealing seat, that the self-adjusting flow in the open State of the nozzle needle, as it corresponds to a pilot injection, exclusively is determined by the cross section in the region of the sealing seat.
  • the radial Sales is very sharp-edged, have manufacturing tolerances This site has negligible effects on itself in the open state the nozzle needle resulting flow area.
  • FIG. 1 shows the front section of an injection nozzle, that is to say the section the combustion chamber of an internal combustion engine to be supplied is facing.
  • the injection nozzle has a nozzle body 10 which is provided in the region of its front end with several injection holes 12. On the inside of the nozzle body 10 with a conical contact surface 14th provided, which has a cone angle ⁇ of about 60 °.
  • a nozzle needle 16 is arranged between the a closed position in which no fuel from a (not shown) Fuel supply to the spray holes 12 can flow, and an open Adjustable position in which the injection of fuel is possible.
  • an open Adjustable position in which the injection of fuel is possible.
  • the opening stroke can be controlled so that the injected Fuel quantity is adapted to the particular requirements.
  • a small O réelleshub possible, so that only a small amount of fuel is injected to achieve a pre-injection, as well as the actual Opening stroke, which causes a larger amount of fuel injected so that a main combustion takes place.
  • the nozzle needle 16 has an inlet surface 18, which in the embodiment shown is designed as a conical surface.
  • the outer contour of the inlet surface When viewed in section from FIG. 1, it closes at an angle ⁇ of approximately 22.5 ° with FIG Center axis M of the injector. Notwithstanding the embodiment shown For the angle ⁇ could also deviating values between 0 ° and 45 ° to get voted.
  • a radial shoulder 20 At the inlet surface 18 closes downstream, ie to the spray holes 12th towards, a radial shoulder 20, so that a sharp-edged sealing seat 22 is formed.
  • the paragraph 20 is designed so that a tangent to its contour (considered in the section of Figure 1) in the region of the transition to the inlet surface 18, ie in the region of the sealing seat 22 in the embodiment shown vertically to the central axis M of Etnspntzduse.
  • the sealing seat 22 should be less sharp-edged, so with a included angle between the tangent to the radial shoulder in the area the sealing seat and the inlet surface 18 of less than 112, 5 ° or when the inclination angle ⁇ of the inlet surface 18 is smaller than the 22.5 ° shown,
  • the tangent to the radial shoulder adjacent to the seal seat 22 may also be include a smaller angle than 90 ° with the central axis M, so obliquely down to the center axis M out to the desired sharp-edged
  • the angle should be between the tangent to the Paragraph is enclosed adjacent to the sealing seat 22 and the central axis M, not less than 45 °.
  • the radial shoulder 20 is designed on its stromabwartigen side so that a tangent to its contour (viewed again in the section of Figure 1) in parallel to the center axis M is.
  • a circumferential groove closes 24 which forms a flow-through gap to the injection holes 12 at the contour indicated by A in Figure 1, the circumferential groove 24 extends exactly to the inlet in the spray holes.
  • the circumferential groove 24 extends to the center of the injection holes 12, and in the Figure 1 designated C contour, the circumferential groove 24 extends completely over the spray holes.
  • the extent of the circumferential groove 24 in the axial direction that is, for example, accordingly one of the contours A, B or C represents a compromise between the flow area in the region of the circumferential groove, which should be as large as possible and with regard to the HC values of the supplied internal combustion engine harmful volume, which is formed by the circumferential groove and possible should be small.
  • the sealing seat 22 is lifted off the abutment surface 14. Since adjoining the sealing seat 22 of the radial shoulder 20 and the circumferential groove 24, the narrowest flow area is formed by the sealing seat 22; the downstream of the sealing seat 22 subsequent flow area are all larger. Due to the sharp-edged geometry used for the seal seat 22, the unavoidable manufacturing tolerances have a comparatively gennge effect on the resulting flow area.
  • the resulting flow area A is a function of the needle stroke s shown.
  • the reference numeral 22 is the course of the flow area referred to, resulting from the sealing seat 22.
  • With the reference number 14 is the flow area designated, due to the downstream of the sealing seat 22 lying areas of the nozzle needle and the Contact surface results.
  • the reference numeral 12 is finally the flow area referred to, which is determined by the spray holes 12.
  • the nozzle needle performs only a small opening stroke V, as used for a Voreinspntzung, the resulting flow area is determined exclusively by the sealing seat 22. Only when a larger opening stroke is performed, first results in a flow area, which is no longer determined by the sealing seat 22, but by the contact surface 14 and the inlet to the spray holes. This is followed by an even larger opening stroke of the nozzle needle, a region in which the flow area is constant and is determined solely by the cross section of Spntzlocher 12. This range continues until the maximum opening stroke s max of the nozzle needle, which is on the order of 0.2 to 0.3 mm.
  • the geometry of the nozzle needle according to the invention has no influence on the two last-mentioned areas since it has an effect only on opening strokes as used for pre-injection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Injecteur de carburant comportant un corps d'injecteur (10), muni d'au moins un orifice d'injection (12) ainsi que d'une surface d'appui (14) conique, et une aiguille d'injection (16) mobile dans le corps d'injecteur et munie d'une surface de pénétration (18) ainsi que d'un épaulement (20) radial qui se raccorde en aval à la surface de pénétration, de manière à former à la transition de la surface de pénétration un siège d'étanchéité qui peut interagir avec la surface d'appui, et qu'une tangente à l'épaulement radial dans la zone du siège d'étanchéité et l'axe central de l'injecteur font un angle supérieur à 45°,
    caractérisé en ce que
    une rainure périphérique (24) qui s'étend axialement au moins jusqu'à l'orifice d'injection (12) est formée en aval à la suite de l'épaulement radial, de sorte que, lorsque l'aiguille d'injection a une course d'ouverture pour réaliser l'injection préalable, la zone du siège d'étanchéité forme la section transversale la plus étroite entre l'aiguille d'injection et le corps d'injecteur.
  2. Injecteur selon la revendication 1,
    caractérisé en ce que
    la rainure périphérique (24) s'étend jusqu'au centre de l'orifice d'injection (12).
  3. Injecteur selon la revendication 1,
    caractérisé en ce que
    la rainure périphérique (24) s'étend sur tout l'orifice d'injection (12).
  4. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    l'angle que font la tangente à l'épaulement (20) radial et l'axe central M de l'injecteur est de 90° environ.
EP01903592A 2000-01-10 2001-01-05 Injecteur de carburant Expired - Lifetime EP1163442B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10000574A DE10000574A1 (de) 2000-01-10 2000-01-10 Kraftstoff-Einspritzdüse
DE10000574 2000-01-10
PCT/DE2001/000016 WO2001051806A1 (fr) 2000-01-10 2001-01-05 Injecteur de carburant

Publications (2)

Publication Number Publication Date
EP1163442A1 EP1163442A1 (fr) 2001-12-19
EP1163442B1 true EP1163442B1 (fr) 2005-07-06

Family

ID=7627024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01903592A Expired - Lifetime EP1163442B1 (fr) 2000-01-10 2001-01-05 Injecteur de carburant

Country Status (9)

Country Link
US (1) US20030057299A1 (fr)
EP (1) EP1163442B1 (fr)
JP (1) JP2003519758A (fr)
KR (1) KR20010102515A (fr)
CN (1) CN1188591C (fr)
BR (1) BR0103895A (fr)
DE (2) DE10000574A1 (fr)
PL (1) PL349996A1 (fr)
WO (1) WO2001051806A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10245573A1 (de) 2002-09-27 2004-04-08 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10246693A1 (de) * 2002-10-07 2004-04-15 Siemens Ag Einspritzvorrichtung zum Einspritzen von Kraftstoff
KR20040038080A (ko) * 2002-10-31 2004-05-08 현대자동차주식회사 커먼레일 엔진용 인젝터
DE10251014A1 (de) * 2002-11-02 2004-05-19 Robert Bosch Gmbh Kraftstoffzumesseinheit für Kraftstoffeinspritzanlagen von Brennkraftmaschinen
DE10305303A1 (de) * 2003-02-10 2004-08-19 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung, insbesondere für Brennkraftmaschinen mit Kraftstoff-Direkteinspritzung
DE102005025135A1 (de) * 2005-06-01 2006-12-07 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US7578450B2 (en) * 2005-08-25 2009-08-25 Caterpillar Inc. Fuel injector with grooved check member
US7360722B2 (en) * 2005-08-25 2008-04-22 Caterpillar Inc. Fuel injector with grooved check member
US20070200011A1 (en) * 2006-02-28 2007-08-30 Caterpillar Inc. Fuel injector having nozzle member with annular groove
GB0625770D0 (en) * 2006-12-22 2007-02-07 Delphi Tech Inc Fuel injector for an internal combustion engine
DE102009042155A1 (de) * 2009-09-21 2011-04-07 Continental Automotive Gmbh Kraftstoff-Einspritzventil für eine Brennkraftmaschine
EP2439447A1 (fr) * 2010-10-05 2012-04-11 Siemens Aktiengesellschaft Buse à combustible, chambre de combustion de turbine à gaz et brûleur doté d'une telle buse à combustible
WO2012085901A2 (fr) 2011-05-09 2012-06-28 Lietuvietis Vilis I Canal d'égalisation de pression à trous recouverts par aiguille
DE102012218016A1 (de) * 2012-10-02 2014-04-03 Continental Automotive Gmbh Düsenbaugruppe für ein Einspritzventil und Einspritzventil
CN103277225A (zh) * 2013-06-07 2013-09-04 苏州柏德纳科技有限公司 一种喷油嘴
CN103742778B (zh) * 2014-01-09 2016-08-24 四川宁江山川机械有限责任公司 一种注油机注油嘴的改进结构
JP6354519B2 (ja) * 2014-10-23 2018-07-11 株式会社デンソー 燃料噴射弁
CN104612875A (zh) * 2014-12-02 2015-05-13 中国第一汽车股份有限公司无锡油泵油嘴研究所 一种新型大流量共轨喷油器喷油嘴偶件
DE102016215637A1 (de) 2016-08-19 2018-02-22 Robert Bosch Gmbh Kraftstoffeinspritzdüse
CN106762303B (zh) * 2016-12-15 2019-08-27 江苏大学 一种控制商用车用柴油机小油量时喷射稳定性用孔式喷油嘴
DE102019210551A1 (de) * 2019-07-17 2021-01-21 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54901Y2 (fr) * 1975-05-22 1979-01-17
DE2710217A1 (de) * 1977-03-09 1978-09-14 Bosch Gmbh Robert Kraftstoffeinspritzduese
JP2765178B2 (ja) * 1990-04-11 1998-06-11 株式会社デンソー 燃料噴射ノズル
JP2841768B2 (ja) * 1990-07-23 1998-12-24 日産自動車株式会社 ディーゼル機関用燃料噴射ノズル
JP2841770B2 (ja) * 1990-07-26 1998-12-24 日産自動車株式会社 ディーゼル機関用燃料噴射ノズル
JPH04318277A (ja) * 1991-04-17 1992-11-09 Nissan Motor Co Ltd 燃料噴射ノズル
JPH0583369U (ja) * 1992-04-20 1993-11-12 日産ディーゼル工業株式会社 燃料噴射ノズル
GB9425652D0 (en) * 1994-12-20 1995-02-22 Lucas Ind Plc Fuel injection nozzle
DE19547423B4 (de) 1995-12-19 2008-09-18 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH10196492A (ja) * 1997-01-13 1998-07-28 Isuzu Motors Ltd ディーゼルエンジン
DE19820513A1 (de) * 1998-05-08 1999-11-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzdüse für eine Brennkraftmaschine

Also Published As

Publication number Publication date
BR0103895A (pt) 2001-12-18
US20030057299A1 (en) 2003-03-27
KR20010102515A (ko) 2001-11-15
WO2001051806A1 (fr) 2001-07-19
CN1188591C (zh) 2005-02-09
DE10000574A1 (de) 2001-07-19
EP1163442A1 (fr) 2001-12-19
DE50106669D1 (de) 2005-08-11
JP2003519758A (ja) 2003-06-24
CN1358256A (zh) 2002-07-10
PL349996A1 (en) 2002-10-21

Similar Documents

Publication Publication Date Title
EP1163442B1 (fr) Injecteur de carburant
DE19820513A1 (de) Kraftstoffeinspritzdüse für eine Brennkraftmaschine
EP0686763A1 (fr) Injecteur de combustible pour moteurs à combustion interne
DE19755057A1 (de) Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen
DE4440182C2 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE3239461A1 (de) Kraftstoffeinspritzduese fuer einen verbrennungsmotor
DE4341545A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE2750929A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE602004004056T2 (de) Einspritzdüse
DE3502642A1 (de) Kraftstoffeinspritzventil fuer eine luftverdichtende einspritzbrennkraftmaschine
EP2470771A1 (fr) Injecteur de carburant
DE19756986C1 (de) Speichereinspritzsystem
DE6608758U (de) Kraftstoffeinspritzvorrichtung mit voreinspritzung.
DE10115216A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
WO2002048536A1 (fr) Soupape d'injection de carburant destinee a des moteurs a combustion interne
DE19843616A1 (de) Kraftstoffeinspritzdüse
WO2001051805A2 (fr) Injecteur
EP1651858B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
DE19804752A1 (de) Sitzventil
AT397289B (de) Kraftstoffeinspritzdüse für brennkraftmaschinen
EP1526274B1 (fr) Dispositif d'injection de carburant, en particulier pour un moteur à combustion interne à injection directe
DE3117665C2 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE112017002148B4 (de) Taschenlose Kraftstoffdüse umfassend eine Anordnung mit einer vorstehenden Spitze
DE3141850C2 (de) Druckventil für eine Kraftstoff-Einspritzpumpe einer Brennkraftmaschine
EP0413173A2 (fr) Injecteur de combustible pour moteurs à combustion interne

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: 20020121

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

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

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 20050706

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: 20050706

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: 50106669

Country of ref document: DE

Date of ref document: 20050811

Kind code of ref document: P

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

Effective date: 20050706

ET Fr: translation filed
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

Effective date: 20060407

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

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

Ref country code: FR

Payment date: 20190122

Year of fee payment: 19

Ref country code: DE

Payment date: 20190326

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50106669

Country of ref document: DE

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: 20200131

Ref country code: DE

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

Effective date: 20200801