US3565048A - Arrangement for the controlled electronic ignition of internal combustion engines - Google Patents

Arrangement for the controlled electronic ignition of internal combustion engines Download PDF

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Publication number
US3565048A
US3565048A US764767A US3565048DA US3565048A US 3565048 A US3565048 A US 3565048A US 764767 A US764767 A US 764767A US 3565048D A US3565048D A US 3565048DA US 3565048 A US3565048 A US 3565048A
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United States
Prior art keywords
ignition
transistor
coil
condenser
thyristor
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Expired - Lifetime
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US764767A
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English (en)
Inventor
Louis Monpetit
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Societe des Procedes Modernes dInjection SOPROMI
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Societe des Procedes Modernes dInjection SOPROMI
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/005—Other installations having inductive-capacitance energy storage

Definitions

  • the semiconductive member is constituted by a transistor or a thyristor incorporated with said circuit so that the ignitioncontrolling pulses reaching said transistor or thyristor allow the condenser to discharge into the primary of the ignition coil and to thereby release the ignition.
  • the induction coil can possibly control the injection of fuel in which case two semiconductive members are used which control respectively injection and ignition.
  • the present invention relates to an electronic ignition system for internal combustion engines, the ignition of which is to be controlled, said arrangement including an ignition coil provided with a primary and with a secondary winding, a distributor feeding the high voltage from the secondary winding, into the sparking plugs according to the desired sequence of the cylinders to be subjected to ignition and lastly a semiconductive member receiving the electric pulses adapted to trigger the ignition procedure.
  • the drawback of such a prior arrangement resides in the fact that the ignition coil draws a current of a large intensity which is objectionable chiefly when the engine runs at a low speed and the generator or the alternator does not yet produce the maximum loading current since the current passes through the ignition coil almost constantly, except during the very short duration of the interruption required for inducing a high voltage in the secondary winding.
  • the ignition coil must be of a special structure by reason of the intense primary current causing considerable heating of the windings.
  • the present invention has for its object to cut out such drawbacks of prior arrangements and it covers an ignition system for internal combustion engines the ignition of which is controlled, said arrangement including conventionally an ignition coil provided with a primary and with a secondary winding, a distributor feeding the high voltage from the secondary of the ignition coil into the sparking plug or plugs in the prescribed sequence and a semiconductive member adapted to receive an electric pulse wherethrough the ignition procedure is triggered.
  • the energy for the ignition coil is stored in at least one condenser inserted in parallel with an induction coil and forming with said induction coil an oscillating circuit. The discharge of said condenser through the induction coil is prevented by two diodes.
  • the flow of current through the induction coil is controlled by a transistor the base of which is subjected to a switching pulse while the ignition coil is connected in a manner such that for each pulse applied to the semiconductive member controlling the ignition, said condenser discharges into the primary of said ignition coil.
  • the induction coil is constituted by the winding controlling an electromagnetic fuel injector inserted in series with a resistance, a diode and an injection-controlling transistor, the condenser being connected through one of its terminals with a point of the lead connecting the resistance with said diode and through its other terminal through another diode with a point of the lead connecting the induction coil with the collector of the transistor while the primary of the ignition coil is connected across the terminals of said other diode and the semiconductive member controlling the ignition is constituted by the transistor controlling the injection of fuel, whereby each pulse applied to said transistor triggers simultaneously an injection of fuel and an ignition of a spark plug.
  • the semiconductive member controlling the ignition is constituted by a thyristor inserted between the primary of the ignition coil and the transistor, a signal applied on the electrode controlling said thyristor causing the discharge of the condenser through the primary of the ignition coil after a pulse applied to the transistor controlling the injection has initiated the latter in accordance with the disclosure in the preceding paragraph.
  • the induction coil is constituted by the winding of an electromagnetic fuel injector inserted in series with a resistance, a thyristor controlling the injection and a transistor adapted to control the flow of current through the induction coil, the condenser being connected through one of its terminals with a point of the lead connecting the resistance with the thyristor .and through its other terminal with a diode connected with a point of the lead connecting the induction-coil with the collector of said transistor, the primary of the ignition coil being connected across the terminals of the last-mentioned diode.
  • the semiconductive member controlling the ignition in this embodiment is the transistor controlling current flow through the induction coil, whereby each pulse applied to said transistor triggers an ignition through a discharge of the condenser across the primary of the ignition coil and each pulse applied to said thyristor triggers an injection after the pulse applied to the transistor has triggered the ignition procedure.
  • a second condenser and a further diode in series therewith form a shunt across the first condenser and its diode, while a point of the lead connecting said second condenser with its diode is connected with one terminal of the induction coil through the agency of a thyristor, the semiconductive member controlling the ignition being in one with the transistor adapted to control of the current flow through the induction coil, so that each pulse applied to said transistor triggers an ignition through a discharge of said first condenser across the primary of the ignition coil and each pulse applied to said thyristor triggers an injection through the discharge of said second condenser across the winding of the electromagnetic injector after the pulse applied to the transistor has triggered the ignition procedure.
  • FIG. 1 illustrates a first embodiment of the invention.
  • FIG. 2 illustrates a second embodiment of the invention.
  • FIG. 3 illustrates a third embodiment of the invention.
  • FIG. 4 illustrates a fourth embodiment of the invention.
  • the induction coil 1 is inserted in series with a diode 6, a resistance 7 and a transistor 2 between the terminals of a supply ofvoltage.
  • a condenser 4 inserted in series with a further diode 5 forms with said induction coil an oscillating circuit.
  • the primary 3a of the ignition coil is connected in parallel with the diode 5 and its secondary 3b is connected either directly with the spark plug in case of a single cylinder engine or else with a conventional distributor 13, which feeds the high voltage from 3b to the different spark plug 14 plugs in the desired sequence required for ignition.
  • the transistor 2 is thus suddenly cutoff and the oscillating circuit constituted by the induction coil 1 and condenser 4 begins oscillating during one quarter of a period, so as to charge the condenser through the diodes S and 6; the oscillations are however locked thereafter by said diodes and the kinetic energy in the induction coil is stored as a voltage between the plates of the condenser 4.
  • the induction coil 1 may be constituted by the winding controlling an electromagnetic injector.
  • the signal initiating the injection of fuel is applied to the base of the transistor 2 so as to energize the induction coil 1 and commence the injection corresponding for instance to the cylinder No. l of a four-cylinder engine and the ignition of the cylinder No. 4 of the same engine since in this case said cylinder No. l is at the beginning of its suction stroke while the cylinder No. 4 is at the same moment at the stage corresponding to ignition.
  • the duration of the pulse to which the base of the transistor is subjected should correspond to the duration of the injection to be produced by the energization of the winding constituted by the corresponding injection coil 1.
  • a thyristor 8 inserted in the circuit of the primary 3a of the ignition coil constitutes the semiconductive member controlling the ignition.
  • the initiation of the ignition is not obtained simultaneously with the energization of the induction coil controlling the electromagnetic injector.
  • the ignition is initiated only a short time afterwards by an ignition signal applied to the control electrode of said thyristor 8 which last signal is produced by control device 12 as disclosed above in connection with the embodiment of FIG. 1.
  • the embodiment illustrated in FIG. 3 includes a thyristor 9 as a substitute for the diode 6 in FIGS. 1 and 2.
  • the semiconductive member controlling the ignition is constituted by the transistor 2.
  • the ignition is initiated by the saturation of the transistor 2, while the injection is initiated only a short time afterwards by a pulse fed into the electrode-controlling thyristor 9 and produced by control device 23, as described above.
  • the duration of the injection corresponds therefore to the period elapsed between conduction of the thyristor 9 and the cutoff of the transistor 2.
  • a second condenser 10 inserted in series with a diode ll shunts the first condenser 4 in series with the diode 5.
  • the kinetic energy in the induction coil 1 is then stored in both condensers 4 and 10 when the transistor 2 has been switched off after one quarter of a period of oscillation has elapsed.
  • a thyristor 12 is connected through one of its terminals with condenser 10 and through its other terminal with a point between the induction coil 1 and diode 6.
  • An improved ignition system for a fuel in ection engine comprising: an ignition coil; an inductance through which current normally flows during fuel injection; energy storage means connected in parallel with said inductance; switching means for causing the electrical energy generated upon cutoff of current flow through said inductance to be stored in said energy storage means; and means for transferring the energy stored in said energy storage means to the ignition coil at the commencement of ignition.
  • the improved ignition system of claim 1 including means connected between said energy storage means and said inductance to prevent the transfer of energy stored in said energy storage means to said inductance.
  • said switching means comprises a transistor connected in series with said inductance and said means for transferring comprises a thyristor connected between an electrode of said transistor and said ignition coil.
  • said switching means comprises a thyristor connected in series with said inductance and said means for transferring comprises a transistor connected in series with said ignition coil and said energy storage means.
  • the improved ignition system of claim 1 including second energy storage means connected in parallel with said energy storage means; a thyristor connected between said energy storage means and said inductance and wherein said switching means and said means for transferring comprise a transistor connected in series with said inductance.
  • Control device 23 should be Control device Col. A, line 13 iniative should be initiation Signed and sealed this 9th day of November 1971.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US764767A 1967-10-06 1968-10-03 Arrangement for the controlled electronic ignition of internal combustion engines Expired - Lifetime US3565048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR123611 1967-10-06

Publications (1)

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US3565048A true US3565048A (en) 1971-02-23

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US764767A Expired - Lifetime US3565048A (en) 1967-10-06 1968-10-03 Arrangement for the controlled electronic ignition of internal combustion engines

Country Status (5)

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US (1) US3565048A (enrdf_load_stackoverflow)
DE (1) DE1800937C3 (enrdf_load_stackoverflow)
ES (1) ES358819A1 (enrdf_load_stackoverflow)
FR (1) FR1557015A (enrdf_load_stackoverflow)
GB (1) GB1219137A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815556A (en) * 1971-05-12 1974-06-11 Motobecane Ateliers Device for controlling the injection of fuel in internal combustion engines
US3913536A (en) * 1972-09-01 1975-10-21 Bosch Gmbh Robert Fuel injection system for an internal combustion engine
US3942485A (en) * 1970-10-07 1976-03-09 Hitachi, Ltd. Fuel injection apparatus
US4186713A (en) * 1976-10-28 1980-02-05 Lucas Industries Limited Ignition systems for internal combustion engine
US4393850A (en) * 1980-07-10 1983-07-19 Nippon Soken, Inc. Ignition system for internal combustion engines
US4506650A (en) * 1982-06-05 1985-03-26 Kabushiki Kaisha Sigma Electronics Planning Ignition device for internal combustion engines
US7730880B1 (en) * 2008-12-16 2010-06-08 Mitsubishi Electric Corporation Ignition apparatus for internal combustion engine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3164851D1 (en) * 1980-05-01 1984-08-23 Lucas Ind Plc Combined ignition control and fuel injection valve operating circuit for an internal combustion engine
JPS5749059A (en) * 1980-09-08 1982-03-20 Toshiba Corp Driving circuit of injector
DE10338353A1 (de) * 2003-08-21 2005-03-17 Bayerische Motoren Werke Ag Schaltanordnung für eine kombinierte Zündkerze-/Einspritzventil-Einheit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020897A (en) * 1959-11-18 1962-02-13 Sony Corp Ignition system for an internal combustion engine
US3357415A (en) * 1965-10-07 1967-12-12 Gen Motors Corp Capacitor discharge ignition system
US3372684A (en) * 1965-03-11 1968-03-12 Lucas Industries Ltd Spark ignition systems
US3410257A (en) * 1965-03-11 1968-11-12 Lucas Industries Ltd Spark ignition systems
US3461345A (en) * 1961-06-13 1969-08-12 Lucas Industries Ltd Spark ignition systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020897A (en) * 1959-11-18 1962-02-13 Sony Corp Ignition system for an internal combustion engine
US3461345A (en) * 1961-06-13 1969-08-12 Lucas Industries Ltd Spark ignition systems
US3372684A (en) * 1965-03-11 1968-03-12 Lucas Industries Ltd Spark ignition systems
US3410257A (en) * 1965-03-11 1968-11-12 Lucas Industries Ltd Spark ignition systems
US3459164A (en) * 1965-03-11 1969-08-05 Lucas Industries Ltd Spark ignition systems
US3357415A (en) * 1965-10-07 1967-12-12 Gen Motors Corp Capacitor discharge ignition system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942485A (en) * 1970-10-07 1976-03-09 Hitachi, Ltd. Fuel injection apparatus
US3815556A (en) * 1971-05-12 1974-06-11 Motobecane Ateliers Device for controlling the injection of fuel in internal combustion engines
US3913536A (en) * 1972-09-01 1975-10-21 Bosch Gmbh Robert Fuel injection system for an internal combustion engine
US4186713A (en) * 1976-10-28 1980-02-05 Lucas Industries Limited Ignition systems for internal combustion engine
US4393850A (en) * 1980-07-10 1983-07-19 Nippon Soken, Inc. Ignition system for internal combustion engines
US4506650A (en) * 1982-06-05 1985-03-26 Kabushiki Kaisha Sigma Electronics Planning Ignition device for internal combustion engines
US7730880B1 (en) * 2008-12-16 2010-06-08 Mitsubishi Electric Corporation Ignition apparatus for internal combustion engine

Also Published As

Publication number Publication date
FR1557015A (enrdf_load_stackoverflow) 1969-02-14
GB1219137A (en) 1971-01-13
DE1800937B2 (de) 1978-07-27
DE1800937A1 (de) 1969-08-21
DE1800937C3 (de) 1979-03-22
ES358819A1 (es) 1970-06-01

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