EP0367777B1 - Einspritzventil - Google Patents

Einspritzventil Download PDF

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Publication number
EP0367777B1
EP0367777B1 EP88905670A EP88905670A EP0367777B1 EP 0367777 B1 EP0367777 B1 EP 0367777B1 EP 88905670 A EP88905670 A EP 88905670A EP 88905670 A EP88905670 A EP 88905670A EP 0367777 B1 EP0367777 B1 EP 0367777B1
Authority
EP
European Patent Office
Prior art keywords
injection valve
valve according
terized
charac
opening
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.)
Revoked
Application number
EP88905670A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0367777A1 (de
Inventor
Paolo Bertini
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6809637&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0367777(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0367777A1 publication Critical patent/EP0367777A1/de
Application granted granted Critical
Publication of EP0367777B1 publication Critical patent/EP0367777B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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 an injection valve according to the preamble of claim 1.
  • an injection valve is e.g. described in DE-OS 34 11 337.
  • the fuel is fed via fuel guide holes to a processing hole with a much larger diameter and volume than the fuel guide holes.
  • the fuel should emerge from the fuel guide bores without touching the wall and then impact the wall of the processing bore in order to flow over it in the form of a parabola at the end of the processing bore, in the form of a parabola.
  • a subsequent further processing bore is designed in such a way that its diameter decreases towards an injection section.
  • the spraying section also has teeth directed towards the spraying end.
  • This configuration is intended to avoid the formation of larger fuel droplets, so that the fuel is sprayed evenly.
  • a perforated nozzle for internal combustion engines is known from DE-OS 34 15 905.
  • the nozzle bore having a cylindrical shape is provided at a distance from its area on the inlet side with a surface which deviates from the cylindrical shape and acts as a disturbance for the fuel jet to be sprayed off, in order thereby to achieve a reduction in combustion noise.
  • the invention is based on the object of designing an injection valve in such a way that the amount of fuel sprayed vaporizes better and faster.
  • the inventive solution to this problem is characterized in claim 1. It is based on a special design of the Nozzle opening through which it is possible to give the sprayed fuel jet a richly structured and therefore very large surface area, which promotes the evaporation of the fuel.
  • FIG. 2 shows a partial view of the nozzle body according to FIG. 1 in a greatly enlarged illustration
  • FIG. 4 shows a partial section corresponding to FIG. 2 through a second embodiment of a valve body
  • FIG. 6 shows a partial section like FIG. 4 through a further exemplary embodiment, which differs from that according to FIG. 4 by a different connection between the nozzle body and the valve body,
  • FIG 8 shows a section through the fuel jet according to FIG 6 along line VIII-VIII.
  • the injection valve shown in FIG. 1 has a conventional structure. Only part of the housing 1 is shown, the interior 10 of which is closed at one end by a valve body 5. This has a line 52 concentric to a main axis H, which passes through the valve body from the inside to the outside and which is surrounded on the inside by an annular valve seat 51.
  • a guide pin 2 is arranged concentrically to the main axis H, on which an armature 3 is slidably mounted, which carries a flat closing part 4 at one end. Armature 3 with closing part 4 are pressed down by a spring 6, so that the closing part 4 is seated on the valve seat 51 and thus prevents the escape of fuel from the interior through the line 52.
  • the armature 3 is pulled slightly upwards with the aid of an electromagnet (not shown) and the valve is thereby opened. Without a special measure, a compact fuel jet is created with an essentially circular cross section and a relatively small surface area.
  • the nozzle opening 53 at the end of the line 52 has a special design, which can be clearly seen in particular from FIGS. 3 and 5: it is formed from a circular central opening 530, 530 ⁇ and from three peripheral openings 531, 531 ⁇ , which define the central opening 530, 530 ⁇ expand outwards and which are located in an annular zone 540, 540,, which extends between the central opening 530, 530 ⁇ and the end of the line 52.
  • the ring zone includes with the main axis H an angle of inclination ⁇ which is less than 90 ° and preferably between 30 ° and 60 °: the smaller this angle, the greater the jet cone of the sprayed fuel.
  • the peripheral openings 531, 531 ⁇ are formed symmetrically to minor axes N, which have the same angular distance ⁇ of 120 ° from one another.
  • Each peripheral opening 531, 531 ⁇ is delimited at the end by a semicircular end piece 5310, 5310 ⁇ and two adjoining, mutually opposite side edges 5311. These side edges — as just shown in FIG. 3 — of adjacent peripheral openings each intersect at one point on the circular central opening 530: This results in approximately triangular guide tabs 5401 within the ring zone 540 between adjacent peripheral openings 531, by means of which the diameter of the entire nozzle opening is reduced compared to that of the line 52.
  • valve body 5 and the nozzle body 54 with the nozzle opening 53 are one piece and, because of the stress on the valve seat 51, are made of stainless steel.
  • a separate nozzle body 54 ⁇ , 54 bis is provided, which is preferably a die-cast part (die-cast zinc) and can be easily manufactured with high accuracy.
  • the nozzle opening 53ö réelle is again formed by a circular central opening 530 ⁇ and three peripheral openings 531 ⁇ extending radially outward from it, each of which has a semicircular end piece 5310 ⁇ at the end.
  • This is followed by side edges 5311 ⁇ , which - in contrast to the previously described embodiment - represent arcs.
  • the radius of each peripheral opening is smaller than in the previously described embodiment, so that between the side edges 5311 ⁇ adjacent peripheral openings 531 ⁇ larger guide tabs 540 ⁇ arise.
  • the guide tabs preferably occupy at least 30% of the area of the ring zone, the radial width of the ring zone being between 20% and 50% of the radius of the line 52, 52 ⁇ .
  • valve body 5 and nozzle body 54 are formed in one piece, the shape of this part can be realized using known manufacturing techniques: the valve body can be cast or cold-formed. A combination of the two production steps is particularly expedient, a cast valve body being given its final shape and the exact dimensions by a subsequent cold working. It is also possible to plastically form a valve body with a continuous cylindrical line using a plunger attached to the nozzle opening, that is to say to press material from the area around the nozzle opening into the latter. It should be borne in mind that the diameter of the line 52 is of the order of magnitude of only 1 mm, that is to say that FIGS. 2 to 6 show an approximately 40-fold enlargement of reality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP88905670A 1987-07-01 1988-06-30 Einspritzventil Revoked EP0367777B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8709111U DE8709111U1 (de) 1987-07-01 1987-07-01 Einspritzventil
DE8709111U 1987-07-01

Publications (2)

Publication Number Publication Date
EP0367777A1 EP0367777A1 (de) 1990-05-16
EP0367777B1 true EP0367777B1 (de) 1991-02-20

Family

ID=6809637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88905670A Revoked EP0367777B1 (de) 1987-07-01 1988-06-30 Einspritzventil

Country Status (4)

Country Link
US (1) US4986478A (ja)
EP (1) EP0367777B1 (ja)
DE (2) DE8709111U1 (ja)
WO (1) WO1989000244A1 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT214617Z2 (it) * 1988-06-23 1990-05-09 Weber Srl Ugello per una valvola di dosatura e di polverizzazione del carburanteper un dispositivo di alimentazione di un motore a combustione interna
DE58902133D1 (de) * 1988-06-28 1992-10-01 Siemens Ag Elektromagnetisches kraftstoffeinspritzventil.
KR930004967B1 (ko) * 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 전자식 연료 분사밸브
IT1231875B (it) * 1989-03-14 1992-01-14 Weber Srl Perfezionamento nel circuito di alimentazione del carburante in una valvola per l'iniezione del carburante per un motore a combustione interna ad azionamento elettromagnetico
DE3942306A1 (de) * 1989-12-21 1991-06-27 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
JP2559515B2 (ja) * 1990-02-23 1996-12-04 株式会社日立製作所 燃料噴射弁装置とその製造方法
JP3002286B2 (ja) * 1991-03-15 2000-01-24 ヤマハ発動機株式会社 燃料噴射式４サイクルエンジンの吸気装置
IT1250846B (it) * 1991-10-11 1995-04-21 Weber Srl Valvola dosatrice e polverizzatrice di carburante ad azionamento elettromagnetico avente dimensioni molto ridotte
DE19937961A1 (de) 1999-08-11 2001-02-15 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung von Austrittsöffnungen an Ventilen
US6625971B2 (en) * 2001-09-14 2003-09-30 United Technologies Corporation Fuel nozzle producing skewed spray pattern
US6659074B2 (en) * 2002-05-08 2003-12-09 General Motors Corporation Spark ignition direct injection engine with shaped multihole injectors
JP6429461B2 (ja) * 2013-05-13 2018-11-28 株式会社エンプラス 燃料噴射装置用ノズルプレート

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344270C (de) * 1920-08-15 1921-11-21 Hille Werke Ag Brennstoffduesenscheibe fuer OElmotoren
US4099494A (en) * 1976-10-19 1978-07-11 Caterpillar Tractor Co. Fuel spray
DD134976B1 (de) * 1978-03-16 1980-12-24 Helmut Nehrig Einspritzduese fuer brennkraftmaschinen
IT1122430B (it) * 1979-08-03 1986-04-23 Alfa Romeo Spa Elettroiniettore a transitori rapidi
CA1185850A (en) * 1982-01-11 1985-04-23 Essex Group, Inc. Electromagnetic fuel injector with improved discharge structure
JPS59131575U (ja) * 1983-02-23 1984-09-04 トヨタ自動車株式会社 電子制御機関用燃料噴射弁
GB2144177B (en) * 1983-07-28 1987-01-07 Lucas Ind Plc Fuel injector
DE3411337A1 (de) * 1984-03-28 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
DE3415905A1 (de) * 1984-04-28 1985-11-07 Daimler-Benz Ag, 7000 Stuttgart Lochduese fuer brennkraftmaschine mit direkteinspritzung
GB8611950D0 (en) * 1986-05-16 1986-06-25 Lucas Ind Plc Gasoline injector

Also Published As

Publication number Publication date
WO1989000244A1 (en) 1989-01-12
DE8709111U1 (de) 1987-09-17
US4986478A (en) 1991-01-22
DE3861795D1 (de) 1991-03-28
EP0367777A1 (de) 1990-05-16

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