US3815556A - Device for controlling the injection of fuel in internal combustion engines - Google Patents

Device for controlling the injection of fuel in internal combustion engines Download PDF

Info

Publication number
US3815556A
US3815556A US00252073A US25207372A US3815556A US 3815556 A US3815556 A US 3815556A US 00252073 A US00252073 A US 00252073A US 25207372 A US25207372 A US 25207372A US 3815556 A US3815556 A US 3815556A
Authority
US
United States
Prior art keywords
condenser
needle
fuel
winding
discharge
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
US00252073A
Other languages
English (en)
Inventor
E Jaulmes
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.)
MBK Industrie SA
Original Assignee
Ateliers de la Motobecane SA
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 Ateliers de la Motobecane SA filed Critical Ateliers de la Motobecane SA
Application granted granted Critical
Publication of US3815556A publication Critical patent/US3815556A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F02D2041/201—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost inductance
    • 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
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F02D2041/2013—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost voltage source
    • 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
    • F02D2041/2075—Type of transistors or particular use thereof

Definitions

  • ABSTRACT For a fuel control system of an internal combustion engine having a needle which lifts to admit fuel, an electromagnetic means is provided for lifting the needle which electromagnetic means is energized through discharging of a condenser, the condenser being charged through an alternator operated by the engine.
  • the circuit connecting the alternator to the condenser and to the electromagnetic winding comprises means to cause the condenser to discharge and may also include means to change the time the needle is held in lifted position and to vary the magnetizing current.
  • the present invention relates to improvements in the control of injectors used for the" fuel supply of reciprocating internal combustion engines.
  • the needle of the injector is controlled by passing a low voltage direct current, for a controlled period of time, through the winding of an electromagnet, the armature of which is connected to this needle.
  • control of period can be achieved by electronic means, using transistors, which are appropriate where one has a source of DC voltage, such as the battery of an automobile vehicle, for example.
  • the invention consists essentially in an electric circuit including a condenser, connections for charging the condenser, an electromagnetic winding arranged so that the needle is lifted when current flows in the winding, means for causing discharge of the condenser through the winding in synchronism with the cycles of the engine, and means for varying the discharge to thereby vary the period of each lift of the needle.
  • control of the period of the lift of the needle is carried out by a modification of the characteristics of the discharge circuit of the condenser, consisting in varying the sustaining current in the winding produced by a discharge.
  • Such an arrangement permits a very precise regulation of the fuel supply, by inserting at will different parameters in the circuit, with a view to modifying the lifting time of the needle.
  • FIG. I shows a simple circuit
  • FIG. 2 shows the same circuit modified by the insertion of a diode in the discharge circuit of the con denser
  • FIGS. 3, 4 and 5 show three further variations
  • FIGS. 6 to 9 show readings on an oscilloscope, reproduced by way of explanation.
  • a condenser C is charged by a winding L of an alternator, through a diode D and the discharge of this condenser in a winding 1 of a controlling electromagnet for a needle of an injector is brought about by the triggering of a thyristor T, by a control pulse generated at the correct moment in each cycle of the engine by known means, not shown.
  • This discharge causes changes in the voltage at X (FIG. 3), as illustrated by the curve in FIG. 6, and creates in the winding 1 a magnetizing current which rises to a large instantaneous value, as illustrated by the curve of FIG. 7, this current giving rise to an attraction force F on its core, to which is connected the needle of the injector, not shown.
  • FIG. 7 shows also that this magnetizing current decreases rapidly, to attain very quickly a value close to zero.
  • circuit of FIG. 1 is augmented by a diode D connected in parallel with the winding 1, as shown in FIG. 2, one finds that the discharge of the condenser C changes form (see FIG. 8) and that the magnetizing current, as shown in FIG. 9, retains an appreciable value during a relatively long time, this current remaining sufficient to maintain the needle of the injector lifted.
  • FIGS. 7 and 9 A comparison between FIGS. 7 and 9 will clearly bring out the difference between the results obtained by thearrangement without the diode D (FIG. 7) and the arrangement including the diode D (FIG. 9).
  • the shaded zone represents the energy of the magnetizing current. It appears clearly that this energy in FIG. 7 is less than in FIG. 9.
  • the winding is excited by an impulse of damped nonperiodic form.
  • This type of capacitative discharge permits one to have available the maximum energy in the shortest time for the purpose of control of the needle of the injector.
  • a potentiometer P When the latter is at zero, one is back at the case of FIG. 2, and the opening time of the needle is maximum, while if this potentiometer P is at its maximum value, one is back at the case of FIG. 1, with a minimum time of opening.
  • the resistance of this potentiometer P can be caused to vary as a function of the intake suction of the engine, of the temperature, or of the position of the accelerator, for example.
  • FIG. 4 shows another variation, including a thyristor Th to adjust the time of lift of the needle.
  • a synchronization signal is taken from the alternator L, through the diode d.
  • This signal feeds directly a dephasing circuit Cd constituted by a unijunction transistor UJT, a potentiometer P (or any other device producing an automatic adjustment as a function of external parameters) a condenser c and two resistances R and R
  • FIG. 5 shows another variation, according to which the regulation is carried out by acting on the charging voltage of the condenser C. This adjustment is carried out by a short-circuiting to a greater or less extent of the winding L of the alternator.
  • the invention is particularly of interest in the case of two-stroke engines since, for these engines, the problem arises in different terms than those in which it arises for four-stroke engines.
  • it is possible to make some injection indirectly that is to say some injection in the inlet passage upstream of the inlet valve, and one has available for this all the time during which the inlet valve is 6155621761513 to say 5565i "i /zrevaiiitiansar the engine.
  • a device for controlling the feeding of fuel to an internal combustion engine comprising an injector having a needle which lifts to inject the fuel and an electronic circuit comprising a condenser, connections for charging the condenser with a charging impulse, an electromagnetic winding arranged so that the needle is lifted when current flows in the winding and means to trigger the discharge of the condenser into the winding in synchronism with the cycles of the engine, the improvement wherein said latter means to trigger the discharge of the condenser comprises a thyristor and also comprising control circuit means to vary the sustaining current for lifting the needle, said control circuit having a second thyristor connected in parallel with said winding and comprising means including a unijunction transistor for controlling the second thyristor in proportion to the charging impulse for charging the condenser.

Landscapes

  • Engineering & Computer Science (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)
US00252073A 1971-05-12 1972-05-10 Device for controlling the injection of fuel in internal combustion engines Expired - Lifetime US3815556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717117094A FR2137041B1 (xx) 1971-05-12 1971-05-12

Publications (1)

Publication Number Publication Date
US3815556A true US3815556A (en) 1974-06-11

Family

ID=9076886

Family Applications (1)

Application Number Title Priority Date Filing Date
US00252073A Expired - Lifetime US3815556A (en) 1971-05-12 1972-05-10 Device for controlling the injection of fuel in internal combustion engines

Country Status (7)

Country Link
US (1) US3815556A (xx)
JP (1) JPS5025092B1 (xx)
ES (1) ES402453A1 (xx)
FR (1) FR2137041B1 (xx)
GB (1) GB1367003A (xx)
IT (1) IT959595B (xx)
NL (1) NL153303B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5287839A (en) * 1991-12-30 1994-02-22 Kokusan Denki Co., Ltd. Fuel injection equipment for internal combustion engine
US6367719B1 (en) * 1998-10-22 2002-04-09 Siemens Automotive Corporation Electromechanical valve driver circuit and method
EP1359304A1 (en) * 2002-04-17 2003-11-05 Mikuni Corporation Fuel injection apparatus of an internal-combustion engine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021454A (en) * 1958-04-11 1962-02-13 Bendix Corp Control circuit for electromagnetic devices
US3158791A (en) * 1962-10-04 1964-11-24 Jr Raymond J Deneen Energy recovery coil driver
US3411045A (en) * 1966-03-30 1968-11-12 Bausch & Lomb Electrical circuit for rapidly driving an inductive load
US3433207A (en) * 1966-09-30 1969-03-18 Sopromi Soc Proc Modern Inject Electronic control system for fuel injection systems
US3490425A (en) * 1966-09-30 1970-01-20 Sopromi Soc Proc Modern Inject System for pressurizing and relieving liquids in conduits
US3565048A (en) * 1967-10-06 1971-02-23 Sopromi Soc Proc Modern Inject Arrangement for the controlled electronic ignition of internal combustion engines
US3613644A (en) * 1968-05-24 1971-10-19 Porsche Kg Fuel injection device
US3659563A (en) * 1969-08-01 1972-05-02 Sopromi Soc Proc Modern Inject Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines
US3665901A (en) * 1968-12-27 1972-05-30 Sopromi Soc Proc Modern Inject System controlling the speedy energization of electromagnets, chiefly those controlling the opening of electromagnetic injectors in internal combustion engines
US3710763A (en) * 1966-04-13 1973-01-16 Sopromi Soc Proc Modern Inject High speed fuel injection system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021454A (en) * 1958-04-11 1962-02-13 Bendix Corp Control circuit for electromagnetic devices
US3158791A (en) * 1962-10-04 1964-11-24 Jr Raymond J Deneen Energy recovery coil driver
US3411045A (en) * 1966-03-30 1968-11-12 Bausch & Lomb Electrical circuit for rapidly driving an inductive load
US3710763A (en) * 1966-04-13 1973-01-16 Sopromi Soc Proc Modern Inject High speed fuel injection system
US3433207A (en) * 1966-09-30 1969-03-18 Sopromi Soc Proc Modern Inject Electronic control system for fuel injection systems
US3490425A (en) * 1966-09-30 1970-01-20 Sopromi Soc Proc Modern Inject System for pressurizing and relieving liquids in conduits
US3565048A (en) * 1967-10-06 1971-02-23 Sopromi Soc Proc Modern Inject Arrangement for the controlled electronic ignition of internal combustion engines
US3613644A (en) * 1968-05-24 1971-10-19 Porsche Kg Fuel injection device
US3665901A (en) * 1968-12-27 1972-05-30 Sopromi Soc Proc Modern Inject System controlling the speedy energization of electromagnets, chiefly those controlling the opening of electromagnetic injectors in internal combustion engines
US3659563A (en) * 1969-08-01 1972-05-02 Sopromi Soc Proc Modern Inject Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5287839A (en) * 1991-12-30 1994-02-22 Kokusan Denki Co., Ltd. Fuel injection equipment for internal combustion engine
US5373827A (en) * 1991-12-30 1994-12-20 Kokusan Denki Co., Ltd. Fuel injection equipment for internal combustion engine
US6367719B1 (en) * 1998-10-22 2002-04-09 Siemens Automotive Corporation Electromechanical valve driver circuit and method
EP1359304A1 (en) * 2002-04-17 2003-11-05 Mikuni Corporation Fuel injection apparatus of an internal-combustion engine

Also Published As

Publication number Publication date
NL153303B (nl) 1977-05-16
FR2137041B1 (xx) 1973-05-11
DE2217332B2 (de) 1976-01-08
JPS5025092B1 (xx) 1975-08-21
DE2217332A1 (de) 1972-11-30
GB1367003A (en) 1974-09-18
FR2137041A1 (xx) 1972-12-29
NL7205591A (xx) 1972-11-14
ES402453A1 (es) 1975-04-01
IT959595B (it) 1973-11-10

Similar Documents

Publication Publication Date Title
US4494506A (en) Intake system for an internal combustion engine
US4104991A (en) Circuit for controlling the operability of one or more cylinders of a multicylinder internal combustion engine
US3969614A (en) Method and apparatus for engine control
US3483851A (en) Fuel injection control system
US3756205A (en) Method of and means for engine operation with cylinders selectively unfueled
US3742918A (en) Electronically controlled fuel-supply system for compression-ignition engine
US4080947A (en) Apparatus and method for controlling ignition of multi-cylinder internal combustion engines with a passageway that bypasses throttle valve
US3734067A (en) Fuel injection system for internal combustion engine
US3628510A (en) Fuel supply system for an internal combustion engine providing timed cranking enrichment
US3759231A (en) Electrical fuel injection control system for internal combustion engines
US4225925A (en) Electronic ignition control method and apparatus
US4020802A (en) Fuel injection system for internal combustion engine
US2992640A (en) Fuel injection system
US3683871A (en) Fuel supply system for an internal combustion engine providing voltage compensated cranking enrichment
GB858961A (en) Fuel injection system for internal combustion engines
US3616784A (en) Fuel supply system for an internal combustion engine providing time and voltage compensated cranking enrichment
US3799133A (en) Solenoid valve control for exhaust gas recirculation
US3515104A (en) Electromagnetically controlled fuel injection arrangement for internal combustion engines
US3815556A (en) Device for controlling the injection of fuel in internal combustion engines
US3822678A (en) High speed fuel injection system
US5101797A (en) Control system for a diesel internal combustion engine
US3824967A (en) Electronic fuel injection system
US3722485A (en) Electronic governor for fuel-injection type internal combustion engines
US3710763A (en) High speed fuel injection system
GB1351991A (en) Fuel injection apparatus for internal combustion engines