EP1034371B1 - Soupape d'injection de carburant pour moteur a combustion interne - Google Patents

Soupape d'injection de carburant pour moteur a combustion interne Download PDF

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Publication number
EP1034371B1
EP1034371B1 EP99955773A EP99955773A EP1034371B1 EP 1034371 B1 EP1034371 B1 EP 1034371B1 EP 99955773 A EP99955773 A EP 99955773A EP 99955773 A EP99955773 A EP 99955773A EP 1034371 B1 EP1034371 B1 EP 1034371B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
section
nozzle needle
fuel injection
needle
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
EP99955773A
Other languages
German (de)
English (en)
Other versions
EP1034371A1 (fr
Inventor
Andreas Fath
Günter LEWENTZ
Wilhelm Frank
Eberhard Kull
Hakan Yalcin
Wendelin KLÜGL
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1034371A1 publication Critical patent/EP1034371A1/fr
Application granted granted Critical
Publication of EP1034371B1 publication Critical patent/EP1034371B1/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
    • 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
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • fuel is overpressurized a fuel injection valve in the combustion chamber of an internal combustion engine injected.
  • a fuel injection valve is known from US Pat. No. 4,528,951, which has a nozzle needle which between a Sealing area and the needle tip of a circumferential groove.
  • the hole axis of the injection hole opens into the Groove if the sealing area of the nozzle needle is on the valve seat rests.
  • a fuel injection valve is known from DE 30 14 958 A1, the one nozzle body with a central guide hole has, in which a nozzle needle is guided.
  • the nozzle body is designed as a perforated nozzle. Through the axial movement The nozzle needle opens the valve from the sealing edge the nozzle needle and the valve seat in the nozzle tip of the nozzle body is formed. At the needle tip of the nozzle needle is a paragraph introduced to the wear-related To prevent reduction in valve seat diameter.
  • the object of the invention is that when opening the Valve occurring radially directed to the nozzle needle axis Reduce nozzle needle movements and jet shaping to improve the injection jet.
  • the object of the invention is characterized by the features of the independent Claim 1 solved.
  • a nozzle needle is in the central guide hole guided by a nozzle body.
  • the nozzle needle points a circumferential sealing edge, which together with the conical Valve seat of the nozzle body has a closable pressure-resistant Sealing forms over the axial movement of the nozzle needle the fuel supply to the injection holes in the nozzle tip controls the nozzle body.
  • a peripheral groove is arranged on the needle end of the nozzle needle, on the opening of the fuel injector sets a pressure equalization through which one is radial the nozzle needle acting force is generated, that of a radial Deviation counteracts the nozzle needle and thus it leads axially.
  • the groove at the level of the injection holes in the is advantageous Nozzle tip of the nozzle body arranged, causing the jet formation of the injection jet is improved.
  • Figure 1 shows a fuel injector with a longitudinal section by an essentially rotationally symmetrical Nozzle body 5, in the central guide bore 54 one rotationally symmetrical nozzle needle 1 is guided axially. outgoing the guide bore extends from the end face 58 of the nozzle body 5 54 into a pressure chamber 51, a shaft bore 57 and a tapered valve seat 55, which ends in a sack 56.
  • An inlet channel 59 is on the side Guide bore 54 arranged and opens into the pressure chamber 51st
  • the nozzle needle 1 is divided axially into body sections, whose diameter starts from the rear 11 of the nozzle needle 1 in the direction of the needle end with the needle tip 45 reduce the needle 1.
  • Starting from the back 11 points the nozzle needle 1 at the level of the guide bore 54 approximately Diameter of the guide hole and preferably goes in Height of the pressure chamber 51 in a frustoconical body portion over, followed by a preferably cylindrical trained needle shaft 15 with a smaller Diameter, a frustoconical first body portion 20, a preferably cylindrical first sealing section 25 and the needle end made up of several body sections described below consists.
  • Figure 2 shows a more precise view of the area of the needle end and the nozzle tip 52 from FIG. 1.
  • the sealing edge 27 can thus together with the valve seat 55 interrupt the fuel flow; in the following the Sealing edge 27 with the valve seat 55 referred to as valve 27, 55, that opened depending on the position of the nozzle needle 1 or is closed.
  • valve 27, 55 opens when the nozzle needle 1 is in the direction its back 11 is deflected. Shortly after opening the Valve 27.55 fuel flows into the space between the needle end and the valve seat 55 and further through the injection holes 9 in the combustion chamber of an internal combustion engine.
  • the groove 33 takes place on the Nozzle needle 1 instead of a pressure equalization, whereby by the fuel pressure and the fuel flow on the nozzle needle 1 a exerted radially to its longitudinal axis 10 force which counteracts a radial deviation of the nozzle needle 1, which stabilizes the nozzle needle radially and centrally is centered.
  • the nozzle needle 1 opens the valve seat 55, whereby the valve seat 55 and the sealing edge 27 is mechanically stressed.
  • the sealing surface 29 closes with the valve seat 55 in the closed position of the nozzle needle 1 a first angle a1 at the sealing edge 27, which is only slightly larger than 0 degrees.
  • the first and second groove sections 35, 40 delimit with them Surface the groove 33 and close at their transition second angle a2, which is preferably in the range between 125 and 155 degrees.
  • the axes 90 of the injection holes 9 open when closed Valve 27.55 and preferably also when fully open Valve 27.55 with maximum deflection of the nozzle needle 1 in the Groove 33.
  • the transition between the needle tip 45 and the second groove section 40 has a cross section with a first diameter s1 on.
  • the transition between the second sealing section 30 and the The first groove section 35 of the nozzle needle 1 has a cross section with a third diameter s3.
  • the ratio between the first and the third diameter s1 / s3 is in the range between 0.5 and 0.7.
  • the transition between the first groove section 35 and the second groove section 40 has a cross section with a second diameter s2.
  • the ratio between the first and the second diameter s1 / s2 is approximately 1.
  • the transition between the second sealing section 30 and the first sealing section 25 has a cross section with a fourth diameter s4.
  • the ratio between the third and fourth diameter s3 / s4 is in the range between 0.7 and 0.8.
  • transitions between the body sections with the cross sections with the first, second, third and fourth diameter s1, s2, s3, s4 are preferably rounded, which is the manufacture simplified and thereby advantageous the turbulence the fuel flow can be reduced.
  • the second sealing section 30 closes with the first groove section 35 at the transition with the third diameter s3 third angle a3, which is in the range between 190 and 210 Degree lies, which is advantageous the turbulence of the fuel flow be reduced.
  • the second sealing section 30 into the third angle a3 180 degrees pass, where the first angle a1 >> 1 degree.
  • the Sealing area 28 of the nozzle needle 1 then consists only of the Sealing edge 27.
  • the second angle a2 is adjusted accordingly.
  • the nozzle body 5 is preferably designed as a seat hole nozzle, where the injection holes 9 near the valve 27,55 are arranged in the nozzle tip 52.

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 (9)

  1. Soupape d'injection de carburant avec une aiguille d'injection (1) qui est guidée dans un alésage de guidage central (54) d'un corps d'injection (5) et présente une région d'étanchéité périphérique (27, 28, 29) qui forme conjointement avec le siège de soupape (55) du corps d'injection (5) une soupape (27, 55) qui est ouverte ou fermée en fonction de la position de l'aiguille d'injection (1) et commande l'amenée de carburant vers au moins un trou d'injection (9) dans la pointe d'injection (52) du corps d'injection (5), l'aiguille d'injection (1) présentant entre la région d'étanchéité (27, 28, 29) et la pointe d'aiguille (45) de l'aiguille d'injection (1) une rainure périphérique (33), l'axe (90) du trou d'injection (9) débouchant dans la rainure (33) lorsque la région d'étanchéité (27, 28, 29) de l'aiguille d'injection (1) repose sur le siège de soupape (55), caractérisée en ce que la face d'étanchéité (29) présente un premier angle (a1) avec le siège de soupape (55) dans la position fermée de l'aiguille d'injection (1) sur le bord d'étanchéité (27), angle qui n'est guère plus grand que 0 degré et en ce que la rainure (33) est limitée par la première et la deuxième portion de rainure (35, 40) de l'aiguille d'injection (1), portions qui p résentent un d euxième angle (a2) qui se situe dans la plage comprise entre 125 degrés et 155 degrés.
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que
       le bord (91) situé en direction de la pointe d'injection (52) de l'ouverture du trou d'injection (9) située sur le côté intérieur du corps d'injection (5) est disposé à la hauteur de la deuxième portion de rainure (40) lorsque l'aiguille d'injection (1) est sortie au maximum.
  3. Soupape d'injection de carburant selon l'une des revendications 1 ou 2, caractérisée en ce que
       l'axe (90) du trou d'injection (9) débouche dans la deuxième portion de rainure (40) lorsque la région d'étanchéité (27, 28, 29) de l'aiguille d'injection (1) repose sur le siège de soupape (55).
  4. Soupape d'injection de carburant selon l'une des revendications 1 à 3, caractérisée en ce que
       le corps d'injection (5) est réalisé en tant qu'injecteur à trous à siège.
  5. Soupape d'injection de carburant selon l'une des revendications 1 à 4, caractérisée en ce que
    la transition entre la pointe d'aiguille (45) et la deuxième portion de rainure (40) présente une section transversale avec un premier diamètre (s1),
    la transition entre la deuxième portion d'étanchéité (30) et la première portion de rainure (35) de l'aiguille d'injection (1) présente une section transversale avec un troisième diamètre (s3) et
    le rapport entre le premier et le troisième diamètre (s1, s3) se situe dans la plage comprise entre 0,5 et 0,7.
  6. Soupape d'injection de carburant selon l'une des revendications 1 à 5, caractérisée en ce que
    la transition entre la première portion de rainure (35) et la deuxième portion de rainure (40) présente une section transversale avec un deuxième diamètre (s2) et
    le rapport entre le premier et le deuxième diamètre (s1, s2) est d'environ 1.
  7. Soupape d'injection de carburant selon l'une des revendications 1 à 6, caractérisée en ce que
    la transition entre la deuxième portion d'étanchéité (30) et la première portion d'étanchéité (25) présente une section transversale avec un quatrième diamètre (s4) et
    le rapport entre le troisième et le quatrième diamètre (s3, s4) se situe dans la plage comprise entre 0,7 et 0,8.
  8. Soupape d'injection de carburant selon l'une des revendications 1 à 7, caractérisée en ce que
       les transitions entre les portions de corps et les sections transversales avec le premier, deuxième, troisième et quatrième diamètre s1, s2, s3, s4 sont arrondies.
  9. Soupape d'injection de carburant selon l'une des revendications 1 à 8, caractérisée en ce que
       la deuxième portion d'étanchéité (30) présente un troisième angle (a3) avec la première portion de rainure (35) au niveau de la transition avec le troisième diamètre (s3), angle qui se situe dans la plage comprise entre 190 et 210 degrés.
EP99955773A 1998-09-29 1999-09-22 Soupape d'injection de carburant pour moteur a combustion interne Expired - Lifetime EP1034371B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19844638A DE19844638A1 (de) 1998-09-29 1998-09-29 Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE19844638 1998-09-29
PCT/DE1999/003040 WO2000019088A1 (fr) 1998-09-29 1999-09-22 Soupape d'injection de carburant pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1034371A1 EP1034371A1 (fr) 2000-09-13
EP1034371B1 true EP1034371B1 (fr) 2004-11-17

Family

ID=7882647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955773A Expired - Lifetime EP1034371B1 (fr) 1998-09-29 1999-09-22 Soupape d'injection de carburant pour moteur a combustion interne

Country Status (4)

Country Link
US (1) US6546914B1 (fr)
EP (1) EP1034371B1 (fr)
DE (2) DE19844638A1 (fr)
WO (1) WO2000019088A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136693A2 (fr) * 2000-03-21 2001-09-26 C.R.F. Società Consortile per Azioni Aiguille pour un injecteur de carburant d'un moteur à combustion interne

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10031264A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10103050A1 (de) * 2001-01-24 2002-08-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10115216A1 (de) 2001-03-28 2002-10-10 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10122503A1 (de) * 2001-05-10 2002-11-21 Bosch Gmbh Robert Ventil mit radialen Ausnehmungen
EP1498602B1 (fr) * 2003-07-15 2008-07-09 Delphi Technologies, Inc. Soupape d'injection
DE10359302A1 (de) * 2003-12-17 2005-07-21 Robert Bosch Gmbh Ventilkörper mit Mehrfachkegelgeometrie am Ventilstitz
AT414159B (de) * 2004-07-22 2006-09-15 Bosch Gmbh Robert Einspritzdüse
DE102005037955A1 (de) * 2005-08-11 2007-02-15 Robert Bosch Gmbh Teilentdrosseltes Einspritzventilglied für Kraftstoffinjektoren
US20070200011A1 (en) * 2006-02-28 2007-08-30 Caterpillar Inc. Fuel injector having nozzle member with annular groove
DE102008060889B4 (de) * 2008-12-09 2022-08-25 Pierburg Gmbh Druckregelventil
DE102009029542A1 (de) * 2009-08-28 2011-03-03 Robert Bosch Gmbh Kraftstoffeinspritzventil
JP5842728B2 (ja) * 2012-05-08 2016-01-13 株式会社日本自動車部品総合研究所 燃料噴射弁
DE102016200700A1 (de) * 2016-01-20 2017-07-20 Ford Global Technologies, Llc Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine und fremdgezündete Brennkraftmaschine zur Durchführung eines derartigen Verfahrens
CN106968857B (zh) * 2017-04-14 2023-02-28 无锡职业技术学院 汽油机喷油器喷嘴

Family Cites Families (14)

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US2627254A (en) * 1947-06-12 1953-02-03 Texas Co Fuel injection nozzle
FR1190361A (fr) * 1957-01-23 1959-10-12 Maschf Augsburg Nuernberg Ag Gicleur pour moteurs à combustion interne
CH372501A (de) * 1959-05-25 1963-10-15 Saurer Ag Adolph Einspritzbrennkraftmaschine
FR2328855A1 (fr) * 1975-10-21 1977-05-20 Lucas Industries Ltd Injecteur de carburant liquide pour moteur
DE2710217A1 (de) * 1977-03-09 1978-09-14 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE3014958A1 (de) 1980-04-18 1981-10-29 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese, insbesondere lochduese, fuer brennkraftmaschinen
JPS59186480U (ja) 1983-05-30 1984-12-11 株式会社ボッシュオートモーティブ　システム 燃料噴射ノズル装置
AT389151B (de) * 1983-10-11 1989-10-25 Steyr Daimler Puch Ag Kraftstoffeinspritzduese fuer brennkraftmaschinen
US5241935A (en) * 1988-02-03 1993-09-07 Servojet Electronic Systems, Ltd. Accumulator fuel injection system
DE3810467A1 (de) * 1988-03-26 1989-10-12 Daimler Benz Ag Kraftstoffeinspritzduese fuer eine luftverdichtende direkteinspritzende brennkraftmaschine
US5020500A (en) * 1990-03-28 1991-06-04 Stanadyne Automotive Corp. Hole type fuel injector and injection method
GB9012844D0 (en) * 1990-06-08 1990-08-01 Lucas Ind Plc Fuel injection nozzles
US5159911A (en) * 1991-06-21 1992-11-03 Cummins Engine Company, Inc. Hot start open nozzle fuel injection systems
DE19634933B4 (de) * 1996-08-29 2007-06-06 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136693A2 (fr) * 2000-03-21 2001-09-26 C.R.F. Società Consortile per Azioni Aiguille pour un injecteur de carburant d'un moteur à combustion interne
EP1136693B1 (fr) * 2000-03-21 2006-11-02 C.R.F. Società Consortile per Azioni Aiguille pour un injecteur de carburant d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE59911090D1 (de) 2004-12-23
EP1034371A1 (fr) 2000-09-13
US6546914B1 (en) 2003-04-15
WO2000019088A1 (fr) 2000-04-06
DE19844638A1 (de) 2000-03-30

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