US3821944A - Igniter for an internal combustion engine - Google Patents

Igniter for an internal combustion engine Download PDF

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Publication number
US3821944A
US3821944A US00227857A US22785772A US3821944A US 3821944 A US3821944 A US 3821944A US 00227857 A US00227857 A US 00227857A US 22785772 A US22785772 A US 22785772A US 3821944 A US3821944 A US 3821944A
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US
United States
Prior art keywords
engine
semiconductor switch
time
initiation
igniter
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
US00227857A
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English (en)
Inventor
T Miki
T Saita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of US3821944A publication Critical patent/US3821944A/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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
    • F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
    • 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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/12—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having means for strengthening spark during starting
    • 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
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
    • F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices

Definitions

  • a voltage dropping element is selectively inserted in a feeding circuit of an ignition coil of the engine which is connected to a DC electric source during the time of initiation of the engine or during a normal operation so as to compensate for a battery voltage drop at the time of initiation of the engine.
  • a diode is provided for feeding a base current directly to the semiconductor switch at the time of ignition of the engine by short-circuiting the voltage dropping element at such time. A decrease in the base current of the semiconductor switch at the time of initiation of the engine, due to the voltage I dropping element, is thereby avoided.
  • the semiconductor switch is thus sufficiently conducted at the time of initiation of the engine, such that sufficient current is fed to the ignition coil so as to improve the ignition efficiency at the time of initiation of the engine.
  • BACKGROUND OF THE INVENTION cludes a semiconductor such as a transistor or thyristor having a base circuit 10.
  • An interrupter 11, an exciting coil 12 of an electric source generator for supplying an electric charge, and a starter 13 are also provided.
  • FIGS. 1 and 2 it should be understood that the interrupter II is shut and opened to thereby shut and open the semiconductor switch 9 and accordingly interrupt the electric current of the ignition coil 8.
  • the moving element of the keyswitch 1 is connected to the contacts 3 and 4 as is shown in FIG. 2 and accordingly, the starter I3 is actuated.
  • an electric current is fed through the contact 3 to the ignition coil 8, and to the base circuit through the resistor 7.
  • Electric current is also fed through the resistor 7 to the exciting coil 12. Since the voltage drop across the resistor 7 is high, the electric current in the base circuit 10 is extremely low.
  • the base circuit 10 would be connected between the resistor 7 and the connecting point of the ignition coil 8. Additionally, the value of the resistors connected to the base circuit 10 would be decreased, so as to prevent a low base current caused by the voltage drop in the resistor 7.
  • One problem with decreasing the value of the resistors connected to the base circuit 10 is that the same can be easily burned and thereby, rendered inoperative.
  • a problem with increasing the inner resistance of the ignition coil 8 is that an overcurrent will be fed to the base circuit 10 during the operation of the engine, whereby again, the resistors of the base circuit 10 can be burned and ultimately rendered inoperative.
  • FIG. 1 is an electrical schematic diagram showing the operation of a conventional igniter, using a semiconductor switch, during normal operation;
  • FIG. 2 is an electrical schematic diagram showing the operation of the convention igniter of FIG. 1 during initiation of an engwne;
  • FIG. 3 is an electrical schematic diagram of one preferred embodiment of the igniter of the present invention.
  • FIG. 4 is an electrical schematic diagram of another preferred embodiment of the igniter of the present invention.
  • FIG. 4 shows an alternative preferred embodiment of the igniter of this invention wherein another diode 15 is inserted.
  • the electric current rating of the diode 14 can be decreased, whereby the igniter can be even more compact and of a lower cost.
  • a semiconductor switch for switching the electric current through saidprimary winding, said semiconductor switch including a base circuit connected directly to said power source during the normal operation of said engine;
  • diode means connected between said base circuit and said terminal of said primary winding for increasing the conduction of said semiconductor switch during the cranking operation of said engine thereby increasing the voltage at said terminal of said primary winding whereby the current from said power source through said primary winding is increased during said cranking operation of said engine.

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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)
US00227857A 1971-02-23 1972-02-22 Igniter for an internal combustion engine Expired - Lifetime US3821944A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971010838U JPS477528U (enrdf_load_stackoverflow) 1971-02-23 1971-02-23

Publications (1)

Publication Number Publication Date
US3821944A true US3821944A (en) 1974-07-02

Family

ID=11761479

Family Applications (1)

Application Number Title Priority Date Filing Date
US00227857A Expired - Lifetime US3821944A (en) 1971-02-23 1972-02-22 Igniter for an internal combustion engine

Country Status (4)

Country Link
US (1) US3821944A (enrdf_load_stackoverflow)
JP (1) JPS477528U (enrdf_load_stackoverflow)
CA (1) CA932383A (enrdf_load_stackoverflow)
GB (1) GB1324313A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128082A (en) * 1977-03-18 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Electronic fuel injection control device
US4186713A (en) * 1976-10-28 1980-02-05 Lucas Industries Limited Ignition systems for internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5670120A (en) * 1979-11-09 1981-06-11 Meikikou:Kk Bearing structure of roller for conveyor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173410A (en) * 1962-11-29 1965-03-16 Motorola Inc Electrical system
US3180997A (en) * 1961-09-21 1965-04-27 Gen Motors Corp Transistor ignition system having primary circuit resistance control
US3434463A (en) * 1967-01-30 1969-03-25 Herbert Bartch Transistorized ignition system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4329850Y1 (enrdf_load_stackoverflow) * 1966-04-13 1968-12-07

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180997A (en) * 1961-09-21 1965-04-27 Gen Motors Corp Transistor ignition system having primary circuit resistance control
US3173410A (en) * 1962-11-29 1965-03-16 Motorola Inc Electrical system
US3434463A (en) * 1967-01-30 1969-03-25 Herbert Bartch Transistorized ignition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186713A (en) * 1976-10-28 1980-02-05 Lucas Industries Limited Ignition systems for internal combustion engine
US4128082A (en) * 1977-03-18 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Electronic fuel injection control device

Also Published As

Publication number Publication date
GB1324313A (en) 1973-07-25
DE2208598A1 (de) 1972-09-07
DE2208598B2 (de) 1975-08-28
CA932383A (en) 1973-08-21
JPS477528U (enrdf_load_stackoverflow) 1972-09-27

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