US3810449A - Electromagnetic fuel injectors - Google Patents

Electromagnetic fuel injectors Download PDF

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Publication number
US3810449A
US3810449A US00264329A US26432972A US3810449A US 3810449 A US3810449 A US 3810449A US 00264329 A US00264329 A US 00264329A US 26432972 A US26432972 A US 26432972A US 3810449 A US3810449 A US 3810449A
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US
United States
Prior art keywords
signal
monostable
square
auxiliary winding
winding
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 - Lifetime
Application number
US00264329A
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English (en)
Inventor
M Chollet
F Denmat
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.)
FINANC ET IND DES ATELIERS SOC
SOC FINANCIERE ET IND DES ATELIERS FR
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FINANC ET IND DES ATELIERS SOC
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Publication date
Application filed by FINANC ET IND DES ATELIERS SOC filed Critical FINANC ET IND DES ATELIERS SOC
Application granted granted Critical
Publication of US3810449A publication Critical patent/US3810449A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • 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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
    • F02D2041/2079—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements the circuit having several coils acting on the same anchor

Definitions

  • back EMF back electromotive force
  • the spring which keeps the needle closed applies a force of several hundred kg.
  • An opposing but appreciably smaller force arises from the fuel pressure and varies according as the needle is in the raised or lowered position.
  • the attraction operative on the magnetic shunt rapidly secured to the needle exceeds the difference between the two forces just mentioned by an amount which defines the acceleration of the moving masses at the beginning of the rise.
  • the air gap is small to start with, the attraction increases considerably, to become very high indeed when the armatures are in engagement with one another.
  • FIG. 1 is a diagram of a first embodiment of the invention
  • FIG. 2 is a graph, with time plotted along the abscissa and current along the ordinates, showing the shape of the signals or pulses used in the embodiment of FIG. ll;
  • FIG. 3 is a diagram of a variant having provision for altering the timing of the signal transmitted to the auxiliary winding
  • FIG. 4 is a graph which supplements the graph shown in FIG. 2 and which shows the shape of the signals used in the variant of FIG. 3. 1
  • an electromagnet ll of an electromagnetic injector and an armature 2 associated with an injector needle are conventional items and are therefore shown in only very diagrammatic form.
  • the electromagnet 1 has a main winding 3 and an auxiliary winding 4 which is equal or equivalent to the main winding except for its direction.
  • Main winding 3 is energized via a circuit comprising an injection control signal generator 5 which transmits signals, as shown on line A in FIG. 2, to an injection delay computer 7 determining, in dependence upon various engine'operating parameters, the transmission of square or rectangular signals 8 represented by a line B in FIG. 2.
  • Signals 8 are amplified by an amplifier 9 which out puts distorted control signals 10, as indicatedby a line C in FIG. 2, to the main winding 3 so as to attract armature 2 and therefore raise .the injector needle.
  • the leading edge of the square signal 8 is detected by such signal being sampled between computer 7 and amplifier 9 and supplied to a shunt device 11, the same outputting a signal 112, of the shape represented by a line D in FIG. 2, to a monostable 13 adapted to output a square or rectangular signal 14 (line E in FIG. 2) whose leading edge coincides with the trailing edge of signal 8 and whose length can be as required.
  • Signal 14 goes to the auxiliary winding 4 viaan amplifier 15 which is similar to the amplifier 9 and which outputs the opposing distorted signal 16 (line F in FIG. 2).
  • the main winding 3 is energized as just described, but a monostable l3 determining the length of the signal 14 transmitted to the amplifier l5 and thence to the auxiliary winding 4 (lines H and I in FIG. 4) is preceded by a further monostable l7 outputting a square or rectangular signa] 18 whose leading edge coincides with the signal 12 and whose trailing edge coincides with the leading edge of signal 14; consequently, the timing of the signal 14 and therefore of the action of the opposing signal 16 on the auxiliarywinding 4 can be shifted.
  • This double adjustment feature improves the flexibility of adaptation of the facility to individual requirements.
  • the invention is very useful for fuel injection devices in heavy diesel engines such as are used in ships, power stations, factories, etc.
  • Apparatus for accelerating unsticking of stationary and moving electromagnet armatures in an electromagnetic injector comprising:
  • an electromagnet having a main winding for receiving signals from said signal generator, and an auxiliary winding for receiving opposing-signals;
  • a computer connected to said signal generator for outputting square or rectangular signals to the main winding
  • a second monostable in series with said first monostable for adjusting the start of the square or rectangular signal produced by said first monostable, and an amplifier connected between said monostables and the auxiliary winding for transmitting a square or rectangular signal to said auxiliary winding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Magnetically Actuated Valves (AREA)
US00264329A 1971-07-01 1972-06-19 Electromagnetic fuel injectors Expired - Lifetime US3810449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7124083A FR2144125A5 (enrdf_load_stackoverflow) 1971-07-01 1971-07-01

Publications (1)

Publication Number Publication Date
US3810449A true US3810449A (en) 1974-05-14

Family

ID=9079661

Family Applications (1)

Application Number Title Priority Date Filing Date
US00264329A Expired - Lifetime US3810449A (en) 1971-07-01 1972-06-19 Electromagnetic fuel injectors

Country Status (7)

Country Link
US (1) US3810449A (enrdf_load_stackoverflow)
JP (1) JPS5429654B1 (enrdf_load_stackoverflow)
CH (1) CH570550A5 (enrdf_load_stackoverflow)
DE (1) DE2232266A1 (enrdf_load_stackoverflow)
FR (1) FR2144125A5 (enrdf_load_stackoverflow)
GB (1) GB1400019A (enrdf_load_stackoverflow)
SE (1) SE392362B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913536A (en) * 1972-09-01 1975-10-21 Bosch Gmbh Robert Fuel injection system for an internal combustion engine
US4350132A (en) * 1978-08-11 1982-09-21 Robert Bosch Gmbh Apparatus for driving electromagnetic devices, particularly electromagnetic injection valves in internal combustion engines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307070C2 (de) * 1983-03-01 1985-11-28 FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen Stelleinrichtung für ein zwischen zwei Endstellungen verstellbares Schaltelement
DE3307683C1 (de) * 1983-03-04 1984-07-26 Klöckner, Wolfgang, Dr., 8033 Krailling Verfahren zum Aktivieren einer elektromagnetisch arbeitenden Stelleinrichtung sowie Vorrichtung zum Durchfuehren des Verfahrens

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289059A (en) * 1941-01-09 1942-07-07 Gen Electric Circuit controller
US2450904A (en) * 1944-07-12 1948-10-12 John L Moncrief Remote-control system for prime mover dynamo plants
US2468308A (en) * 1945-05-24 1949-04-26 Western Electric Co Relay circuit
US2918911A (en) * 1958-01-02 1959-12-29 Weselco Ltd Device for injecting fluid into internal combustion engines
US3021454A (en) * 1958-04-11 1962-02-13 Bendix Corp Control circuit for electromagnetic devices
US3064165A (en) * 1960-05-23 1962-11-13 Collins Radio Co Relay speed-up circuit
US3267482A (en) * 1962-01-22 1966-08-16 Ampex Driver circuit for magnetic recording heads

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289059A (en) * 1941-01-09 1942-07-07 Gen Electric Circuit controller
US2450904A (en) * 1944-07-12 1948-10-12 John L Moncrief Remote-control system for prime mover dynamo plants
US2468308A (en) * 1945-05-24 1949-04-26 Western Electric Co Relay circuit
US2918911A (en) * 1958-01-02 1959-12-29 Weselco Ltd Device for injecting fluid into internal combustion engines
US3021454A (en) * 1958-04-11 1962-02-13 Bendix Corp Control circuit for electromagnetic devices
US3064165A (en) * 1960-05-23 1962-11-13 Collins Radio Co Relay speed-up circuit
US3267482A (en) * 1962-01-22 1966-08-16 Ampex Driver circuit for magnetic recording heads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913536A (en) * 1972-09-01 1975-10-21 Bosch Gmbh Robert Fuel injection system for an internal combustion engine
US4350132A (en) * 1978-08-11 1982-09-21 Robert Bosch Gmbh Apparatus for driving electromagnetic devices, particularly electromagnetic injection valves in internal combustion engines

Also Published As

Publication number Publication date
DE2232266A1 (de) 1973-01-11
FR2144125A5 (enrdf_load_stackoverflow) 1973-02-09
JPS5429654B1 (enrdf_load_stackoverflow) 1979-09-25
CH570550A5 (enrdf_load_stackoverflow) 1975-12-15
SE392362B (sv) 1977-03-21
GB1400019A (en) 1975-07-16

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