EP0223018B1 - Soupape électromagnétique de combustion - Google Patents

Soupape électromagnétique de combustion Download PDF

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Publication number
EP0223018B1
EP0223018B1 EP86113334A EP86113334A EP0223018B1 EP 0223018 B1 EP0223018 B1 EP 0223018B1 EP 86113334 A EP86113334 A EP 86113334A EP 86113334 A EP86113334 A EP 86113334A EP 0223018 B1 EP0223018 B1 EP 0223018B1
Authority
EP
European Patent Office
Prior art keywords
ejection orifice
fuel injection
injection valve
electromagnetically actuated
pintle
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
Application number
EP86113334A
Other languages
German (de)
English (en)
Other versions
EP0223018A2 (fr
EP0223018A3 (en
Inventor
Andreas Sausner
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO 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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to AT86113334T priority Critical patent/ATE42132T1/de
Publication of EP0223018A2 publication Critical patent/EP0223018A2/fr
Publication of EP0223018A3 publication Critical patent/EP0223018A3/de
Application granted granted Critical
Publication of EP0223018B1 publication Critical patent/EP0223018B1/fr
Expired 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M51/0671—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 having an elongated valve body attached thereto
    • F02M51/0675—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 having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—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 having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention relates to an electromagnetically actuated fuel injection valve for injection systems for internal combustion engines with a valve housing, a spray opening, a magnetic core provided with a magnetic coil and a valve closing member which is connected to an armature assigned to the magnetic core, a pin arranged in the spray opening having a conical area which does not protrude beyond the plane formed by the outer edge of the spray opening.
  • a well atomized fuel is particularly important for the combustion process in internal combustion engines.
  • Fuel injection valves have already become known in which a swirl chamber is provided, in which the fuel runs tengentially in order to improve the atomization.
  • the maintenance of the swirl within the spray opening is supported by a pin-like extension of the injection needle.
  • An electromagnetically actuated fuel injection valve according to the preamble of claim 1 is known from DE-A 3 023 757, in which an insert is pressed in the direction of flow after the valve closing member into a guide bore, the area of smaller diameter of which forms a metering cross-section with the wall of the guide bore.
  • the desired injection quantity can be set during the manufacture of the fuel injection valve. Special measures to improve the atomization are not provided in the known fuel injection valve.
  • a nozzle with a pin insert is also known, the conical region of which ends at the outer edge of the spray opening and does not project beyond the outer edge of the spray opening.
  • the object of the present invention is to provide an electromagnetically actuated fuel injection valve in which good atomization is ensured.
  • the electromagnetically actuated fuel injection valve according to the invention has the advantage that the fuel layer flowing on the wall of the spray opening is disturbed by particles emanating from the conical part of the pin before reaching the edge, as a result of which the fuel layer flowing along the wall is detached in the form of larger drops is prevented.
  • this results in good atomization of the fuel and at the same time a hollow spray cone.
  • the spray opening is conical in an outer region, the conical regions of the pin and the spray opening can be designed such that the free cross section decreases in the direction of the outer edge of the spray opening.
  • the angle formed by the lateral surface and the axis of the conical region of the pin is greater than the opening angle of the conical region of the spray opening. This accelerates the fuel as it flows through the spray opening, which in turn contributes to better atomization. Because it is thereby achieved that the liquid particles detaching from the surface of the conical part at the edge thereof are thrown by the radial component of their speed or, in the case of the swirl, by centrifugal force in the direction of the edge of the spray opening and there the formation of a closed flow to disturb.
  • the pin can be held in a holding body which has at least one bore.
  • the direction of the bore for generating a swirl can have a tangential component.
  • the holding body can be arranged to be axially displaceable in the cylindrical region, as a result of which the spraying quantity can be easily adjusted.
  • An embodiment of this development consists in that the cylindrical region of the spray opening and the holding body are each provided with a thread.
  • a tube 1, a flange-like part 2 of the tube 1 and the housing 3 form a magnetically conductive core for the magnet coil 4, which is arranged on a winding body 5.
  • Seals 6, 7 are provided between the winding body 5 on the one hand and the tube 1 and the housing 3 on the other hand.
  • the tube 1 also serves as a connection for the fuel line.
  • a valve needle 12 is mounted in a guide part 11 and is pressed with its lower part against the valve seat 14 by a coil spring 13.
  • the valve seat 14 is part of a spray opening 15 provided in the guide part 11, which continues in an opening of the cap 16.
  • An armature 17 is provided at the end of the valve needle 12 opposite the spray opening 15, which armature is drawn against the spring force in the direction of the tube 1 when the solenoid 4 is energized and thus opens the valve.
  • the spray opening 15 has a conical region and a cylindrical region 21.
  • a holding body for a pin 19 is located in the cylindrical region 21.
  • the holding body 18 has one or more bores 22 which have a tangential component.
  • FIG. 2 shows an enlarged representation of the area of the spray opening 15.
  • the holding body 18 is screwed into the cylindrical area 21 of the spray opening 15 by means of a thread 23.
  • the pin 19 By rotating the pin 19, the axial position of the holding body 18 and the pin 19 can thus be adjusted precisely.
  • the stroke of the valve needle 12 has a very strong influence on the amount of fuel to be metered in each case with one stroke. It is therefore necessary in known valves to adhere to the amount of fuel to be metered by tight tolerances of the corresponding parts of the fuel injection valve and by additional reworking of the already assembled valve. This rework consists, for example, in that the valve bore is reground, and is time-consuming and therefore cost-intensive.
  • the static throughput in the region of the working stroke of the valve needle 12 as a result of a curved characteristic curve is relatively little dependent on the stroke.
  • the curvature of the characteristic curve results from the fact that with small strokes the opening annular gap between the closing member 25 and the valve seat 14 opposes the greatest resistance to the fuel flow, while with larger strokes the flow resistance of the one located between the pin 19 and the conical wall of the spray opening 15 Annular gap predominates.

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)
  • Magnetically Actuated Valves (AREA)

Claims (7)

1. Injecteur de carburant à manoeuvre électromagnétique pour installations d'injection pour moteurs à combustion comportant un boîtier (3), une ouverture (15) d'injection, un noyau magnétique muni d'une bobine magnétique (4) et un obturateur (12) d'injection, relié à une armature (17) correspondant au noyau magnétique, étant précisé qu'un téton (19) disposé dans l'ouverture d'injection, présente une zone conique (28) qui ne déborde pas au-delà du plan formé par le bord extérieur (27) de l'ouverture d'injection, caractérisé par les particularités suivantes:
a) en aval de l'obturateur (12) est disposé un mécanisme (18, 22) pour créer un mouvement hélicoïdal,
b) à ce mécanisme pour créer un mouvement hélicoïdal se raccorde un espace (20) pour mouvement hélicoïdal, constitué du téton (19) rapporté, disposé dans l'ouverture (15) d'injection et de la paroi (26) de l'ouverture (15) d'injection.
c) côté chambre de combustion, le téton (19) rapporté se termine, à l'intérieur de l'ouverture d'injection, par un embout (28) qui va en s'élargissant en cône dans le sens de l'écoulement,
d) l'embout (28) conique du téton (19) rapporté forme, avec la paroi (26) de l'ouverture (15) d'injection, une fente annulaire,
e) la zone conique (28) du téton (19) et la paroi (26) de l'ouverture (15) d'injection dans cette zone ont une forme telle que la section libre décroît dans le sens de l'écoulement.
2. Injecteur de carburant à manoeuvre électromagnétique selon la revendication 1, caractérisé en ce que l'ouverture (15) d'injection a la forme d'un cône dans une zone extérieure (20).
3. Injecteur de carburant à manoeuvre électromagnétique selon la revendication 2, caractérisé en ce que l'angle formé par la surface latérale et l'axe de la zone conique (28) du téton (19) est supérieur à l'angle d'ouverture de la zone conique (20) de l'ouverture (15) d'injection.
4. Injecteur de carburant à manoeuvre électromagnétique selon la revendication 1, caractérisé en ce que le téton (19) est tenu dans un support (18) qui présente au moins un perçage (22).
5. Injecteur de carburant à manoeuvre électromagnétique selon la revendication 4, caractérisé en ce que la direction du perçage (22) présente une composante tangentielle.
6. Injecteur de carburant à manoeuvre électromagnétique selon la revendication 4, caractérisé en ce que le support (18) est disposé à l'intérieur d'une zone cylindrique (21) de l'ouverture (15) d'injection avec possibilité de réglage en direction axiale.
7. Injecteur de carburant à manoeuvre électroma- gnetique selon la revendication 6, caractérisé en ce que la zone cylindrique (21) de l'ouverture (15) d'injection et le support (18) sont chacun munis d'un filetage (23, 24).
EP86113334A 1985-11-04 1986-09-27 Soupape électromagnétique de combustion Expired EP0223018B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113334T ATE42132T1 (de) 1985-11-04 1986-09-27 Elektromagnetisch betaetigbares kraftstoffeinspritzventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539056 1985-11-04
DE19853539056 DE3539056A1 (de) 1985-11-04 1985-11-04 Elektromagnetisch betaetigbares kraftstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP0223018A2 EP0223018A2 (fr) 1987-05-27
EP0223018A3 EP0223018A3 (en) 1987-11-11
EP0223018B1 true EP0223018B1 (fr) 1989-04-12

Family

ID=6285116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113334A Expired EP0223018B1 (fr) 1985-11-04 1986-09-27 Soupape électromagnétique de combustion

Country Status (6)

Country Link
US (1) US4753393A (fr)
EP (1) EP0223018B1 (fr)
JP (1) JPS62107266A (fr)
AT (1) ATE42132T1 (fr)
BR (1) BR8605410A (fr)
DE (2) DE3539056A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723698C2 (de) * 1987-07-17 1995-04-27 Bosch Gmbh Robert Kraftstoffeinspritzventil sowie Verfahren zu dessen Einstellung
DE8802464U1 (de) * 1988-02-25 1989-06-22 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
US5307991A (en) * 1990-10-09 1994-05-03 Ford Motor Company Fuel injector and method of manufacturing
US5836521A (en) * 1995-03-09 1998-11-17 Dysekompagniet I/S Valve device with impact member and solenoid for atomizing a liquid
DE19527626A1 (de) * 1995-07-28 1997-01-30 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19641785C2 (de) * 1996-10-10 1999-01-28 Bosch Gmbh Robert Ventilnadel für ein Einspritzventil

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1694209A (en) * 1925-06-18 1928-12-04 Harry E Davis Device for spraying hydrocarbon fuel
GB263835A (en) * 1925-12-31 1927-05-19 Angelo Scheublein Improvements in spray producers
US2308909A (en) * 1938-02-25 1943-01-19 Blanchard Paul Louis Charles Mechanical atomizing burner
FR2079805A5 (fr) * 1970-02-13 1971-11-12 Roto Diesel Sa
DE2433691A1 (de) * 1974-07-12 1976-01-29 Int Harvester Co Brennstoffventil fuer brennkraftmaschinen
US4232830A (en) * 1978-11-01 1980-11-11 The Bendix Corporation Electromagnetic fuel injector
DE3023757A1 (de) * 1980-06-25 1982-01-21 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil
US4342427A (en) * 1980-07-21 1982-08-03 General Motors Corporation Electromagnetic fuel injector
JPS5862358A (ja) * 1981-10-09 1983-04-13 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPS60252164A (ja) * 1984-05-30 1985-12-12 Automob Antipollut & Saf Res Center 電磁式燃料噴射弁
DE3502086A1 (de) * 1985-01-23 1986-07-24 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3502087A1 (de) * 1985-01-23 1986-07-24 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektromagnetisch betaetigbares kraftstoffeinspritzventil

Also Published As

Publication number Publication date
US4753393A (en) 1988-06-28
DE3539056A1 (de) 1987-05-14
EP0223018A2 (fr) 1987-05-27
ATE42132T1 (de) 1989-04-15
EP0223018A3 (en) 1987-11-11
JPS62107266A (ja) 1987-05-18
DE3662804D1 (en) 1989-05-18
BR8605410A (pt) 1987-08-11

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