US2356577A - Electromagnetic control for injectors of internal-combustion engines - Google Patents

Electromagnetic control for injectors of internal-combustion engines Download PDF

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Publication number
US2356577A
US2356577A US376678A US37667841A US2356577A US 2356577 A US2356577 A US 2356577A US 376678 A US376678 A US 376678A US 37667841 A US37667841 A US 37667841A US 2356577 A US2356577 A US 2356577A
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United States
Prior art keywords
core
injectors
parts
impact
internal
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Expired - Lifetime
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US376678A
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English (en)
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Fuscaldo Ottavio
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Individual
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Individual
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Publication of US2356577A publication Critical patent/US2356577A/en
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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
    • 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
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/001—Fuel-injection apparatus having injection valves held closed mechanically, e.g. by springs, and opened by a cyclically-operated mechanism for a time
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/072—Injection valve actuated by engine for supply of pressurised fuel; Electrically or electromagnetically actuated injectors

Definitions

  • the present invention consists of improvements in the electromagnetic control of injectors for internal combustion engines, and the main object is to improve certain parts of the injector: operating means including those which are particularly subjected to friction and percussion.
  • the general parts include the fixed armature or core part 4, partly annular, and the aligned movable core 5, normally slightly separated, with a small magnetic gap A between them.
  • a 'nonmagnetic or bronze tube or spool l2 surroundsthe core parts and this carries the solenoid coil 30, confined by end flanges.
  • the left flange 2 also const tuting a guide for the movable core part I.
  • Said part I is connected by an open web with a non-magnetic or bronze hub .8 fast on an axial rod 8, which may be the injection valve stem, immersed in the liquid fuel, as more fully shown in the conending application.
  • An interior helical spring I i is shown pressing leftward on hub 8 to open the gap A and close the valve, but adapted to be overcome when energization of coil Ill creates magnetic pull to close the gap and open the valve.
  • the pe cuss on surfaces are not those of the soft iron armature parts I and 4, but are supplemental axial hardened steel impact parts 36 and 34.
  • the hub 8 first projecting from the hub 8 and being preferably an integral part of the stem or rod 9. whereas the second is an elongated stud fixed within the hollow core 4 as by removable mounting in a hollow bronze plug 25 seated in the core 4.
  • This arrangement is also convenient for holding the tapered helical spring ll, which surrounds the impact parts and it and is seated on in 25 and-hub 8.
  • the dimensions are such that the play or magnetic clearance A between the free armature B and the fixed armature I is more than the mechanical play or gap B between the impact pieces 34 and 36, to the extent of a few hundredth parts of a millimeter, so that when the valve is open and parts 34 and 36 touch each other, the parts 5 and 4 are very close together but without touching, of advantage when the spring again asserts itself.
  • the steel stud member 34 may be fixed to the non-magnetic plug 25 by forcing and soft welding, but in such manner that it is magnetically insulated from the material of core 4.
  • the steel impact member 36 is magnetically insulated from the iron of core 5 as already described.
  • an electromagnetic actuating means for an internal combustion engine injection valve having a valve stem comprising longitudinally fixed and movable iron core parts providing a magnetically-closing and spring-opening gap; the combination of a co-actingpair of axial impact pieces of steel carried respectively by the fixed and movable core parts, the impact piece carried by the fixed core part being magnetically insulated therefrom and mounted in such location that the magnetic gap between the two core parts exceeds minutely the mechanical clearance,between the two impact pieces, whereby when the impact pieces are in contact, the two core parts are held minutely close together but without substantial contact; so that impact between the iron core parts is prevented.
  • an electromagnetic actuating means for an internal combustion engine injection valve the combination of an annular fixed core member, a sleeve of non-magnetic material axially mounted therein, an impact member of hardened material mounted in said sleeve and extending into proximity to one extremity of the fixed core member, an annular movable core member arranged for movement axially of the fixed core member, a hardened metal impact member mounted centrally of the movable core member and extending beyond one extremity thereof into position to contact said impact member of the fixed core member wh le sa d fixed and movable core members are minutely spaced from each other, and a coil spring encircling said fixed impact member and extending beyond the free extremity thereof when the actuating means is deenergized into position to engage the movable core member as it approaches the fixed core member when the actuating means becomes energized to thereby cushion the impact between said impact members and compress the spring into position to force sepa ration of the core members when the actuat- 1 8 means is again

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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)
  • Fuel-Injection Apparatus (AREA)
US376678A 1940-02-12 1941-01-30 Electromagnetic control for injectors of internal-combustion engines Expired - Lifetime US2356577A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT240368X 1940-02-12
CH232430T 1941-01-07

Publications (1)

Publication Number Publication Date
US2356577A true US2356577A (en) 1944-08-22

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ID=25727714

Family Applications (1)

Application Number Title Priority Date Filing Date
US376678A Expired - Lifetime US2356577A (en) 1940-02-12 1941-01-30 Electromagnetic control for injectors of internal-combustion engines

Country Status (6)

Country Link
US (1) US2356577A (enrdf_load_stackoverflow)
BE (1) BE440388A (enrdf_load_stackoverflow)
CH (1) CH240368A (enrdf_load_stackoverflow)
FR (1) FR51389E (enrdf_load_stackoverflow)
GB (1) GB544242A (enrdf_load_stackoverflow)
NL (1) NL55697C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482860A (en) * 1945-12-14 1949-09-27 Price Electric Corp Core for electromagnets
US2991399A (en) * 1957-06-10 1961-07-04 Detroit Coil Co Solenoid push pin
EP0450654A1 (en) * 1990-04-06 1991-10-09 WEBER S.r.l. Electromagnetic fuel metering and atomizing valve for an internal combustion engine fuel supply device
US5828144A (en) * 1997-01-13 1998-10-27 Keihin Corporation Electromagnetic actuator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905992A1 (de) * 1989-02-25 1989-09-21 Mesenich Gerhard Elektromagnetisches hochdruckeinspritzventil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482860A (en) * 1945-12-14 1949-09-27 Price Electric Corp Core for electromagnets
US2991399A (en) * 1957-06-10 1961-07-04 Detroit Coil Co Solenoid push pin
EP0450654A1 (en) * 1990-04-06 1991-10-09 WEBER S.r.l. Electromagnetic fuel metering and atomizing valve for an internal combustion engine fuel supply device
US5828144A (en) * 1997-01-13 1998-10-27 Keihin Corporation Electromagnetic actuator

Also Published As

Publication number Publication date
NL55697C (enrdf_load_stackoverflow)
BE440388A (enrdf_load_stackoverflow)
FR51389E (fr) 1942-06-09
CH240368A (fr) 1945-12-15
GB544242A (en) 1942-04-02

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