EP0172591A1 - Elektroinjektor zur Brennstoffzufuhr zu einem Innenverbrennungsmotor - Google Patents

Elektroinjektor zur Brennstoffzufuhr zu einem Innenverbrennungsmotor Download PDF

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Publication number
EP0172591A1
EP0172591A1 EP85201124A EP85201124A EP0172591A1 EP 0172591 A1 EP0172591 A1 EP 0172591A1 EP 85201124 A EP85201124 A EP 85201124A EP 85201124 A EP85201124 A EP 85201124A EP 0172591 A1 EP0172591 A1 EP 0172591A1
Authority
EP
European Patent Office
Prior art keywords
electroinjector
core
annular
armature
shoulder
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.)
Granted
Application number
EP85201124A
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English (en)
French (fr)
Other versions
EP0172591B1 (de
Inventor
Luciano Ramacciotti
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
Spica SpA
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 Weber SRL, Spica SpA filed Critical Weber SRL
Publication of EP0172591A1 publication Critical patent/EP0172591A1/de
Application granted granted Critical
Publication of EP0172591B1 publication Critical patent/EP0172591B1/de
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • 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

Definitions

  • a particular object of the present invention is to realize an electroinjector in which the magnetic and hydraulic stick ing effect is eliminated between the shoulder surfaces of the armature and of the core, such object being achieved by resorting to a range of measures consisting of placing a shoulder element in an intermediate position between the armature and the core, in such a way as to leave a gap which prevents the magnetic sticking, of reducing to the minimum the contact area between the armature and the shoulder element, and of hardening at least one of the mating surfaces, so as to reduce the adhesion force, and at the same time to maintain unchang ed with time the effective contact area.
  • an electroinjector realized according to the principles of the present invention is charac
  • the present invention relates to an electroinjector structurally consisting of a central core of ferromagnetic material, of a coil wound on said core, of a movable armature of ferromagnetic material containing at its end an insert of material suitable to build a tight hydraulic seal when the same is pressed by a return spring on an injection nozzle beneath, of a pipe insert ed inside said central core, which protrudes inward, penetrating inside a hollow part of the armature, so as to act at the same time as a guide means for the armature itself, and partly as means for feeding the fuel to the nozzle, and finally of an outside body which closes the magnetic loop with the central ccre and the armature.
  • General purpose of the invention is of providing an electroinjector designed in such a way as to make the armature opening and closing transients quick and repetitive, the armature being of reduced mass, the frictior coefficients between the armature and its relevant guide being low, the gaps being characterized in order to optimising the efficiency both in the opening stage and in the closing stage of the armature, the load of the spring being optimised by intervening from the outside of the injector.
  • the time duration of the closing transient of the armature/stop- per can be influenced by the effects of the so-called “hydraulic and magnetic stacking" which is experienced when a direct shoulder of end of stroke between armature and central core exists, due to the relative wear which takes place betweer shoulder surfaces.
  • a shoulder element is interplaced, having a substantially annular shape, at least partly consisting of practically amagnetic material, said shoulder element being provided of a substantially annular end wall suitable to come into contact, at least partly, with a portion of the end wall, the latter too being of substantially annular shape, of one of said armature and core, at least one of said substantially annular wall being formed with a shock resistant material.
  • the electroinjector according to the invention is structurally consisting of a core 10 of ferromagnetic material, an outside shell 11, it too consisting of ferromagnetic ma terial, and of an armature 12, which form altogether a magnetic loop.
  • a coil is indicated, wound on a bobbin 14, which surrounds the central core 10 and can be electric ally powered with intermittent power by means of the con nectors 15 housed within a casing of plastics 16.
  • the armature 12 which is coupled with a sealing insert 17 of suitable material, with the interplacing of a washer 18, is guided by a small tube 19 inserted with interference on the central core, and is pressed by a spring 20 against the shoulder of a nozzle 21 equipped with a gauged bore for the outlet of fuel.
  • Said spring 20 interacts with an insert 22 insert ed with interference inside the central core 10.
  • a packing 23 defines the value of the stroke "H" of armature 12, which ends its stroke against a second annular element 24 assembled on core 10 in such a way as to protrude outward by the same value of desired "T" air gap (Fig. 2).
  • Rings 25, 26 and 36 guarantee the hydraulic tightness, whilst the calkings of the shell 11 on the core 10 and on the nozzle 21 render monolithic the electroinjector.
  • An electroinjector provided as above described according to the principles of the invention operates as follows.
  • Fuel is fed through the outer tubular wall of core 10, passes through the central bore of insert 22, then through bores 27 in the core and bores 28 in the arms- ture, it arrives externally to nozzle 21.
  • the spring 20 holds the armature 12 with its sealing insert 17 pressed against the sealing flat surface of the nozzle, which is thus closed.
  • the armature 12 may be manufactured with a harder material than pure iron, such as for instance PERMENORM 5000E3.
  • the annular inserted element 24 (Figs. 2 and 3) can be made of course from AISI 310 or bronze , and it can be assembled both outside and inside of the central core 10 itself.
  • the inserted annular element 24 can be assembled in such a way as to rest against a flat surface 29 of central core 10 (Figs. 1, 6, 7 and 8), or it can be pushed so as to define the desired value of "T" air gap (Figs. 2 and 3), fixing the reached position by dimensional interference, or by other known means, such as by soldering or by glueing means.
  • Another way of fix ing the position of element 24 is to provide a longita dinal slot, such as in 30 (Fig. 4) in it, or as in 31 (Fig. 5), along its whole lenght, or along a part of it, then slindingly forcing it on to the central body, exploiting its elasticity within the limits of a given dimensional interference.
  • a surface layer can be placed of very reduced thickness, of hard material,on the shoulder surface 32 of armature (Fig. 9), said material could be e.g. titanium nitride.
  • the said surfaces can be provided in such a way as to be posi tioned, instead of parallel, so as to form a given a an gle between each other (Fig. 7), of e.g. 1°, or the shoul der surface of the same element 24 can be made radiused, as in 33 (Fig. 6).
EP85201124A 1984-07-12 1985-07-09 Elektroinjektor zur Brennstoffzufuhr zu einem Innenverbrennungsmotor Expired EP0172591B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21869/84A IT1175561B (it) 1984-07-12 1984-07-12 Elettroiniettore perfezionato per alimentare combustibile a un motore a c.i.
IT2186984 1984-07-12

Publications (2)

Publication Number Publication Date
EP0172591A1 true EP0172591A1 (de) 1986-02-26
EP0172591B1 EP0172591B1 (de) 1989-03-08

Family

ID=11188005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201124A Expired EP0172591B1 (de) 1984-07-12 1985-07-09 Elektroinjektor zur Brennstoffzufuhr zu einem Innenverbrennungsmotor

Country Status (3)

Country Link
EP (1) EP0172591B1 (de)
DE (1) DE3568610D1 (de)
IT (1) IT1175561B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215527A1 (de) * 1985-09-19 1987-03-25 WEBER S.r.l. Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren
FR2606830A1 (fr) * 1986-11-15 1988-05-20 Hitachi Ltd Injecteur electromagnetique de carburant
WO1988004727A1 (en) * 1986-12-23 1988-06-30 Lucas Industries Public Limited Company Fuel injector
EP0301620A2 (de) * 1987-07-27 1989-02-01 WEBER S.r.l. Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
DE3834447A1 (de) * 1988-10-10 1990-04-12 Mesenich Gerhard Elektromagnetisches einspritzventil und verfahren zu dessen herstellung
WO1993003272A1 (en) * 1991-07-29 1993-02-18 Siemens Automotive L.P. Means for attenuating audible noise from a solenoid-operated fuel injector
EP0454675B1 (de) * 1988-10-10 1993-08-11 Siemens Aktiengesellschaft Elektromagnetisches düsenklappenventil für kraftstoffeinspritzung in kraftfahrzeugen
WO1995016125A1 (de) * 1993-12-09 1995-06-15 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
WO1995016126A1 (de) * 1993-12-09 1995-06-15 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
WO1998003789A1 (fr) * 1996-07-23 1998-01-29 Peugeot Motocycles S.A. Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
FR2751701A1 (fr) * 1996-07-23 1998-01-30 Peugeot Motocycles Sa Electrovanne notamment d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
EP1088986A1 (de) * 1999-09-28 2001-04-04 MAGNETI MARELLI S.p.A. Brennstoffeinspritzventil
EP1089301A1 (de) * 1999-10-01 2001-04-04 Siemens Automotive Corporation Anordnung und Verfahren zur Änderung des dynamischen Verhaltens eines elektromagnetisch betätigten Antriebs
EP1279826A1 (de) * 2001-07-27 2003-01-29 MAGNETI MARELLI POWERTRAIN S.p.A. Elektromagnetischer Aktuator für ein Kraftstoffeinspritzventil
RU2494281C1 (ru) * 2012-06-20 2013-09-27 Общество с ограниченной ответственностью "Газовая индустрия" Инжектор для подачи газового топлива
WO2015074927A1 (de) * 2013-11-19 2015-05-28 Robert Bosch Gmbh Ventil zum zumessen von fluid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005035613B3 (de) * 2005-07-29 2006-08-31 Staiger Gmbh & Co. Kg Elektromagnetisches Ventil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988675A (en) * 1958-03-28 1961-06-13 Allied Control Co Solenoid-actuated device
DE2123145A1 (de) * 1970-05-12 1971-11-25 Vyzk Ustav Automatizacznich Pr Elektrischer, aus Solenoidventilen bestehender Umschalter für pneumatische Signale
FR2241008A1 (en) * 1973-08-17 1975-03-14 Tech Haute Precision Electro-magnetic petrol injector with rapid action - has accurately controlled annular fuel passage
DE2639274A1 (de) * 1976-09-01 1978-03-02 Binder Magnete Elektromagnet mit ankerschwingungsdaempfung
DE3015192A1 (de) * 1978-11-17 1981-10-22 Innovation Techniques Avances-Innota, Aubagne Elektromagnetische einspritzduese und verfahren zu deren herstellung
US4311280A (en) * 1980-07-21 1982-01-19 General Motors Corporation Electromagnetic fuel injector with adjustable armature spring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988675A (en) * 1958-03-28 1961-06-13 Allied Control Co Solenoid-actuated device
DE2123145A1 (de) * 1970-05-12 1971-11-25 Vyzk Ustav Automatizacznich Pr Elektrischer, aus Solenoidventilen bestehender Umschalter für pneumatische Signale
FR2241008A1 (en) * 1973-08-17 1975-03-14 Tech Haute Precision Electro-magnetic petrol injector with rapid action - has accurately controlled annular fuel passage
DE2639274A1 (de) * 1976-09-01 1978-03-02 Binder Magnete Elektromagnet mit ankerschwingungsdaempfung
DE3015192A1 (de) * 1978-11-17 1981-10-22 Innovation Techniques Avances-Innota, Aubagne Elektromagnetische einspritzduese und verfahren zu deren herstellung
US4311280A (en) * 1980-07-21 1982-01-19 General Motors Corporation Electromagnetic fuel injector with adjustable armature spring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 106 (M-213)[1251], 10th May 1983; & JP - A - 58 27876 (AISAN KOGYO K.K.) 18-02-1983 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215527A1 (de) * 1985-09-19 1987-03-25 WEBER S.r.l. Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren
FR2606830A1 (fr) * 1986-11-15 1988-05-20 Hitachi Ltd Injecteur electromagnetique de carburant
US5012982A (en) * 1986-11-15 1991-05-07 Hitachi, Ltd. Electromagnetic fuel injector
WO1988004727A1 (en) * 1986-12-23 1988-06-30 Lucas Industries Public Limited Company Fuel injector
EP0301620A2 (de) * 1987-07-27 1989-02-01 WEBER S.r.l. Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0301620A3 (de) * 1987-07-27 1990-02-07 WEBER S.r.l. Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
DE3834447A1 (de) * 1988-10-10 1990-04-12 Mesenich Gerhard Elektromagnetisches einspritzventil und verfahren zu dessen herstellung
EP0454675B1 (de) * 1988-10-10 1993-08-11 Siemens Aktiengesellschaft Elektromagnetisches düsenklappenventil für kraftstoffeinspritzung in kraftfahrzeugen
WO1993003272A1 (en) * 1991-07-29 1993-02-18 Siemens Automotive L.P. Means for attenuating audible noise from a solenoid-operated fuel injector
WO1995016126A1 (de) * 1993-12-09 1995-06-15 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
WO1995016125A1 (de) * 1993-12-09 1995-06-15 Robert Bosch Gmbh Elektromagnetisch betätigbares ventil
US5732888A (en) * 1993-12-09 1998-03-31 Robert Bosch Gmbh Electromagnetically operable valve
CN1049951C (zh) * 1993-12-09 2000-03-01 罗伯特·博施有限公司 电磁操纵阀
WO1998003789A1 (fr) * 1996-07-23 1998-01-29 Peugeot Motocycles S.A. Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
FR2751701A1 (fr) * 1996-07-23 1998-01-30 Peugeot Motocycles Sa Electrovanne notamment d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
FR2751700A1 (fr) * 1996-07-23 1998-01-30 Peugeot Motocycles Sa Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
EP1088986A1 (de) * 1999-09-28 2001-04-04 MAGNETI MARELLI S.p.A. Brennstoffeinspritzventil
EP1089301A1 (de) * 1999-10-01 2001-04-04 Siemens Automotive Corporation Anordnung und Verfahren zur Änderung des dynamischen Verhaltens eines elektromagnetisch betätigten Antriebs
EP1279826A1 (de) * 2001-07-27 2003-01-29 MAGNETI MARELLI POWERTRAIN S.p.A. Elektromagnetischer Aktuator für ein Kraftstoffeinspritzventil
RU2494281C1 (ru) * 2012-06-20 2013-09-27 Общество с ограниченной ответственностью "Газовая индустрия" Инжектор для подачи газового топлива
WO2015074927A1 (de) * 2013-11-19 2015-05-28 Robert Bosch Gmbh Ventil zum zumessen von fluid

Also Published As

Publication number Publication date
DE3568610D1 (en) 1989-04-13
IT8421869A1 (it) 1986-01-12
IT1175561B (it) 1987-07-01
EP0172591B1 (de) 1989-03-08
IT8421869A0 (it) 1984-07-12

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