EP0398157A2 - Elektromagnetische Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen - Google Patents

Elektromagnetische Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen Download PDF

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Publication number
EP0398157A2
EP0398157A2 EP90108824A EP90108824A EP0398157A2 EP 0398157 A2 EP0398157 A2 EP 0398157A2 EP 90108824 A EP90108824 A EP 90108824A EP 90108824 A EP90108824 A EP 90108824A EP 0398157 A2 EP0398157 A2 EP 0398157A2
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EP
European Patent Office
Prior art keywords
assemblies
series
nozzle
same
devices
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.)
Withdrawn
Application number
EP90108824A
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English (en)
French (fr)
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EP0398157A3 (de
Inventor
Silverio Bonfiglioli
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.)
Weber SRL
Original Assignee
Weber SRL
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Publication date
Application filed by Weber SRL filed Critical Weber SRL
Publication of EP0398157A2 publication Critical patent/EP0398157A2/de
Publication of EP0398157A3 publication Critical patent/EP0398157A3/de
Withdrawn legal-status Critical Current

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    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M51/061—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

Definitions

  • the present invention relates to a series of electromagnetic fuel injection devices for internal combustion engines, having different fuel injection and supply characteristics.
  • Known fuel injection devices substantially comprise a body defining a chamber housing an annular electromagnet and a tubular core coaxial with the electromagnet; a nozzle in which is formed at least one fuel injection hole; a plunger for controlling fuel passage through the injection hole; and a a tubular anchor secured to the plunger.
  • known fuel injection devices differ as regards numerous design characteristics determining the manner in which the fuel is metered and atomized and supplied to the injector.
  • the nozzle is cup-shaped and presents a bottom wall, in which the injection hole is formed, and a side wall, while the plunger presents a conical active surface designed to rest on a seat formed in the bottom wall, so as to control fuel passage through the injection hole.
  • the nozzle is substantially bell-shaped and presents a top wall, in which the injection hole is formed, and a side wall, while the plunger presents a flat active surface designed to rest on a seat formed in the top wall, again for controlling fuel passage through the injection hole.
  • a substantially axial fuel duct formed inside the core or other parts of the device or for a substantially radial duct comprising a series of holes formed in the side wall of the body.
  • a substantially axial fuel duct formed inside the core or other parts of the device, or for a substantially radial duct comprising a series of holes formed in the side wall of the body.
  • Currently used devices present widely differing designs, depending substantially on the manner in which the fuel is supplied to the injection hole, the number of injection holes, and the shape and size of the plunger.
  • manufacturers are therefore called upon to produce and store numerous different types, to produce numerous components of different shapes and sizes, and provide for specific assembly lines for each type of device produced.
  • the aim of the present invention is to provide a series of electromagnetic fuel injection devices for internal combustion engines, which, despite differences in design in terms of fuel injection and supply, provide for straightforward production involving a limited number of component parts and substantially one production line.
  • a further aim of the present invention is to provide a wide range of devices involving the production and storage of a limited number of component parts and mechanical assemblies.
  • a further aim of the present invention is to provide a number of devices of differing performance, which may be inserted inside the same housing on the engine.
  • a series of electromagnetic fuel injection devices for internal combustion engines said devices presenting different fuel injection and supply characteristics, and each substantially comprising a body defining a chamber housing an annular electromagnet and a tubular core coaxial with said electromagnet; a nozzle in which is formed at least one fuel injection hole; a plunger for controlling fuel passage through said injection hole; and a tubular anchor secured to said plunger; said nozzle presenting a collar for locking said nozzle on to said body, and a spacer washer inserted between said nozzle and the shoulder of a cavity formed in said body and housing said collar and said washer; said cavity in said body communicating with said chamber via a hole coaxial with said cavity and said chamber; characterised by the fact that: each device in the series is produced by connecting together a first and second assembly; said first assembly comprising said body, said core and
  • Each device in the series substantially comprises a first assembly 1 designed as shown in Fig.1 or 2.
  • Both the assemblies in Fig.s 1 and 2 present substantially the same elements, i.e. a body 2 in which is formed a chamber 3; an annular electromagnet 4 housed inside chamber 3; and a tubular core 5 secured to body 2 in any appropriate manner, e.g. by connecting a flange 6 on core 5 to said body 2.
  • Said first assembly 1 also comprises a cover 7, usually made of plastic and secured to flange 6 of core 5 or to body 2.
  • a rod 9 is forced inside an axial hole 8 formed in core 5, said rod 9 presenting an end shoulder 10 and a sealing ring 11 housed inside an annular groove on the rod itself.
  • a tube 12 is forced inside axial hole 8 in core 5.
  • electromagnet 4 is provided with electrical connecting elements 16, and cover 7 is so formed as to insulate the same.
  • Bodies 2 present a side wall 18 and a bottom wall 19.
  • side wall 18 is continuous, whereas that of the Fig.1 assembly presents perforations 20 enabling fuel input to chamber 3.
  • body 2 presents a cavity 21 and a hole 22 enabling communication between cavity 21 and chamber 3.
  • the devices in the series also comprise a second assembly 24, three of which are shown in Fig.s 3, 4 and 5.
  • Each said second assembly substantially comprises a nozzle 25 with a fuel injection hole 26; a plunger 27 for controlling fuel passage through hole 26; and an anchor 28 secured to plunger 27.
  • Each second assembly also comprises a spacer washer 29, the bottom surface 30 of which rests on the top surface of nozzle 25, and a helical spring 31.
  • Nozzle 25 also presents a collar 32 designed in such a manner as to define, with washer 29, an annular housing 33 for a sealing member 34.
  • a second sealing member 37 is fitted about nozzle 25 and located between a pair of annular projections 38 and 39, the former consisting of a washer and the latter of the edge of a bush 40.
  • nozzle 25 is cup-shaped with an injection hole 26 formed in the bottom wall; and plunger 27 presents a conical active surface 44 cooperating with a respective surface of injection hole 26, and a pair of annular projections 43 for guiding it inside nozzle 25.
  • nozzle 25 is bell-shaped with a top wall in which injection hole 26 may be formed; and plunger 27 presents a flat active surface 44 designed to rest on a flat seat 45 formed in top wall 46 of nozzle 25, in which fuel injection hole 26 is also formed.
  • the Fig.5 assembly is the same as in Fig.4, except that it presents a pair of injection holes 48 which may be formed in wall 46 or in a plate secured to nozzle 25.
  • respective diameters d1 and d2 of hole 22 and cavity 21 are the same on all first assemblies 1.
  • Diameter d 1′ of anchor 28 is the same on all second assemblies 24 and substantially equal to diameter d1 of hole 22 (Fig.s 1 and 2).
  • Diameter d2′ of collar 32 of nozzle 25 (Fig.s 3 to 5) is the same on all second assemblies 24 and substantially equal to diameter d2 of cavity 21 (Fig.s 1 and 2).
  • distance h (Fig.s 1 and 2) between shoulder 51, defined by the bottom surface of cavity 21, and end surface 52 of core 5 is the same on all first assemblies 1; and distance h′ (Fig.s 3, 4 and 5) between top surface 53 of washer 29 and top surface 54 of anchor 28 is the same on all second assemblies 24 and substantially equal to distance h between shoulder 51 and end surface 52 of core 5.
  • the axial length h1 of hole 22 is also conveniently the same on all bodies 2 of first assemblies 1.
  • Axial length h2 of cavity 21 is the same on all bodies 2 of first assemblies 1, and distance h2′ between top surface 53 of washer 29 and bottom surface 54 of collar 32 of nozzle 25 is the same on all second assemblies 24 and substantially equal to axial length h2 of cavity 21.
  • the devices in the series may be produced easily by assembling one of second assemblies 24 in Fig.s 3, 4 and 5 on to one of first assemblies l in Fig.s 1 and 2, to produce six different devices. This may be done easily by simply inserting anchor 28 on one of second assemblies 24 inside hole 22 on body 2 of one of assemblies 1, until spacer washer 29 and collar 32 fit inside cavity 21. At this point, second assembly 24 is secured to first assembly 1 by turning end edge 56 of body 2 down over collar 32.
  • any one of second assemblies 24 may be fitted on to any one of first assemblies 1, by virtue of dimensions d1, d2, h and h2 being respectively equal to d1′, d2′, h′ and h2′.
  • Fig.s 6 and 7 show two devices produced by respectively fitting assemblies 24 of Fig.s 3 and 4 on to assembly 1 of Fig.1.
  • Fig.s 8 and 9 show two devices produced by respectively fitting assemblies 24 of Fig.s 3 and 4 on to assembly 1 of Fig.2.
  • the Fig. 6 and 7 devices may be housed inside a cavity 57 into which fuel is supplied, whereas those of Fig.s 8 and 9 may be assembled with nozzle 25 inserted inside a cavity 58 and the top end inside a cavity 59 supplied with fuel.
  • the Fig.8 and 9 configurations therefore provide for two devices wherein fuel flows axially and substantially inside tube 12 and the passages formed between the various device components downstream from the same.
  • the plunger on the first device presents a conical active surface 42, whereas that of the second presents a flat active surface 42.
  • fuel is supplied substantially radially, through perforations 20 in body 2 and the passages formed between the device components downstream from the same, and the plunger presents a conical active surface 42 in Fig.6, and a flat active surface 42 in Fig.7.
  • the present invention therefore provides for producing a series of widely differing devices using only two types of assembly, each consisting of a small number of parts of extremely simple design. Manufacture of the devices is therefore limited to producing a small number of components and assemblies, which assemblies may be stored for catering to predetermined market demand. By appropriately combining two different types of assembly, it is therefore possible to produce a device having predetermined characteristics.
  • first and three second assemblies are described and illustrated herein by way of example, any number of assemblies may be provided and combined for forming additional devices.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19900108824 1989-05-16 1990-05-10 Elektromagnetische Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen Withdrawn EP0398157A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6736189 1989-05-16
IT8967361A IT1232734B (it) 1989-05-16 1989-05-16 Serie di dispositivi per l'iniezione del carburante per motori endotermici ad azionamento elettromagnetico

Publications (2)

Publication Number Publication Date
EP0398157A2 true EP0398157A2 (de) 1990-11-22
EP0398157A3 EP0398157A3 (de) 1991-03-20

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ID=11301760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900108824 Withdrawn EP0398157A3 (de) 1989-05-16 1990-05-10 Elektromagnetische Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen

Country Status (4)

Country Link
EP (1) EP0398157A3 (de)
BR (1) BR9002285A (de)
IT (1) IT1232734B (de)
RU (1) RU1836582C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619858A1 (de) * 1992-11-04 1994-10-19 Cummins Engine Company, Inc. Umwandelbares kraftstoffeinspritzventil
WO1999032785A1 (en) * 1997-12-23 1999-07-01 Siemens Automotive Corporation Ball valve fuel injector

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303507A1 (de) * 1982-02-18 1983-08-25 Aisan Kogyo K.K., Obu, Aichi Elektromagnetischer brennstoff-injektor
JPS58192960A (ja) * 1982-05-06 1983-11-10 Aisan Ind Co Ltd 電磁燃料噴射器の製造方法
US4610080A (en) * 1985-07-29 1986-09-09 Allied Corporation Method for controlling fuel injector lift
EP0257475A2 (de) * 1986-08-21 1988-03-02 Nippondenso Co., Ltd. Kraftstoffeinspritzventil und Verfahren zu dessen Montage
FR2606088A1 (fr) * 1986-10-29 1988-05-06 Hitachi Ltd Injecteur electromagnetique de carburant et procede pour fabriquer un tel injecteur
FR2616485A1 (fr) * 1987-06-09 1988-12-16 Weber Srl Valve d'atomisation et dosage de carburant pour un dispositif d'injection de carburant d'un moteur a combustion interne
EP0301620A2 (de) * 1987-07-27 1989-02-01 WEBER S.r.l. Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2632019A1 (fr) * 1987-11-13 1989-12-01 Hitachi Ltd Injecteur electromagnetique de carburant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303507A1 (de) * 1982-02-18 1983-08-25 Aisan Kogyo K.K., Obu, Aichi Elektromagnetischer brennstoff-injektor
JPS58192960A (ja) * 1982-05-06 1983-11-10 Aisan Ind Co Ltd 電磁燃料噴射器の製造方法
US4610080A (en) * 1985-07-29 1986-09-09 Allied Corporation Method for controlling fuel injector lift
EP0257475A2 (de) * 1986-08-21 1988-03-02 Nippondenso Co., Ltd. Kraftstoffeinspritzventil und Verfahren zu dessen Montage
FR2606088A1 (fr) * 1986-10-29 1988-05-06 Hitachi Ltd Injecteur electromagnetique de carburant et procede pour fabriquer un tel injecteur
FR2616485A1 (fr) * 1987-06-09 1988-12-16 Weber Srl Valve d'atomisation et dosage de carburant pour un dispositif d'injection de carburant d'un moteur a combustion interne
EP0301620A2 (de) * 1987-07-27 1989-02-01 WEBER S.r.l. Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2632019A1 (fr) * 1987-11-13 1989-12-01 Hitachi Ltd Injecteur electromagnetique de carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 37 (M-277)(1474) 17 February 1984, & JP-A-58 192960 (AISAN KOGYO) 10 November 1983, *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619858A1 (de) * 1992-11-04 1994-10-19 Cummins Engine Company, Inc. Umwandelbares kraftstoffeinspritzventil
EP0619858A4 (de) * 1992-11-04 1995-04-26 Cummins Engine Co Inc Umwandelbares kraftstoffeinspritzventil.
WO1999032785A1 (en) * 1997-12-23 1999-07-01 Siemens Automotive Corporation Ball valve fuel injector
US6047907A (en) * 1997-12-23 2000-04-11 Siemens Automotive Corporation Ball valve fuel injector
US6655608B2 (en) * 1997-12-23 2003-12-02 Siemens Automotive Corporation Ball valve fuel injector

Also Published As

Publication number Publication date
IT1232734B (it) 1992-03-04
EP0398157A3 (de) 1991-03-20
BR9002285A (pt) 1991-08-06
RU1836582C (ru) 1993-08-23
IT8967361A0 (it) 1989-05-16

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