US3367314A - Non-contact ignition device - Google Patents

Non-contact ignition device Download PDF

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Publication number
US3367314A
US3367314A US485859A US48585965A US3367314A US 3367314 A US3367314 A US 3367314A US 485859 A US485859 A US 485859A US 48585965 A US48585965 A US 48585965A US 3367314 A US3367314 A US 3367314A
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Prior art keywords
scr
generator
condenser
gate
diode
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Expired - Lifetime
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US485859A
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English (en)
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Hirosawa Yoshiaki
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Honda Gijutsu Kenkyusho KK
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Honda Gijutsu Kenkyusho KK
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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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit

Definitions

  • NONCONTACT IGNITION DEVICE Filed Sept. 8. 1965 United States Patent 3,367,314 NON-CONTACT IGNITION DEVICE Yoshiald Hirosawa, Tokyo, Takaya Senzaki, Yamatomachi, Kita-adachi-gun, Saitarna Prefecture, Japan, assignors to Kahushilri Kaislia Hyundai Gijutsu Kenkyusho, Saitama Prefecture, Japan, a corporation of Japan Filed Sept. 8, 1965, Ser. No. 485,859
  • the invention comprises an electrical ignition system for internal combustion engines wherein an A.C. generator source charges a condenser through half-wave rectifier means and an SCR is switched on to discharge the condenser via the primary ignition coil thereby producing a firing spark.
  • the switching circuit for the SCR comprises a constant voltage diode and a resistor connected in series therewith, the combination being in parallel with the SCR. A connection from the junction of the diode and resistor extends to the gate of the SCR so that when a predetermined voltage level in the half-wave signal is reached, the diode current causes a pulse to the gate for firing the SCR which in turn provides the discharge path for the condenser.
  • This invention relates to a non-contact ignition device for internal combustion engines, wherein the charging and discharging of condenser, as well as the switching of semiconductor elements are utilized.
  • the present invention relates to the type of non-contact ignition device wherein an output current of an A.C. generator, such as a magneto generator, which is rotated synchronously with the internal combustion engine, is rectified to charge a condenser and the charged condenser is discharged by means of a switching circuit comprising a silicon controlled rectifier (which hereinafter is abbreviated to SCR) through a primary coil of the ignition coils so that high voltage or tension induced in a secondary coil may be applied to a plug.
  • an A.C. generator such as a magneto generator
  • a first object of the present invention is to provide an improved non-contact ignition device of the type referred to above wherein a separate or further generator, synchronized with said first mentioned generator as means for feeding a positive signal current to the gate of the SCR,
  • a second object of the present invention is to provide such a device wherein the time when said signal gate current is supplied, that is, the time for igniting can be easily controlled, which object may be achieved concurrently with said first object.
  • a third object is to provide such a device wherein the pulse circuit in the condenser charging and discharging type ignition device for accomplishing the foregoing objects may be easily constructed.
  • FIG. 1 is a connection diagram of the circuit according to the present invention.
  • FIG. 2 shows the operational characteristics of the constant voltage diode according to the present invention
  • an alternative-current generator 1 such as a magneto generator, is mechanically connected with the output shaft of an internal combustion engine.
  • a half-wave rectifier 2 is connected to generator 1 for rectifying its A.C. output.
  • a condenser or capacitor 3 is connected in parallel with generator 1.
  • a primary coil 4 and a secondary high tension coil 5 comprises the ignition coils.
  • a semiconductor controlled rectifier 6 (SCR) provides the discharge path for capacitor 3.
  • the gate G of said SCR 6 is supplied with pulses, so as to discharge the condenser 3 synchronously with rotation of the internal combustion engine, and induce high tension or voltage in the secondary coil 5, in order to ignite a plug 7.
  • a constant voltage diode 8 is electrically connected between an anode A of the SCR 6 and the gate G. When the voltage at the anode reaches at a certain or predetermined level, an ignition gate signal is given to the gate G by Zener current from the constant voltage diode 8 so as to turn on SCR 6.
  • a resistor 9 is connected in series between the constant voltage diode 3 and earth E or the common return line.
  • the A.C. output from the generator 1 is rectified by the rectifier 2, so that the condenser or capacitor 3 is charged, and simultaneously, equivalent voltages are applied to the anode A of SCR and also to the constant voltage diode 8.
  • a predetermined Zener voltage in the constant voltage diode 8 as shown in FIG. 2 causes the Zener current suddenly to flow through the resistor 9.
  • SCR 6 is turned-on by appropriately selecting the current passing through the :gate G by the resulting fall of voltage so as to discharge the charged potential of the condenser 3 through the primary coil 4.
  • SCR 6 is turned off. The above-mentioned operation is repeated per each cycle of output current from the generator 1.
  • the ignition is performed synchronously with the rotation of the internal combustion engine.
  • the frequency of out-put current of the generator correspondingly increases which is shown in broken curve V in FIG. 2.
  • the control of ignition time may be easily effected by regulating the resistance value of the resistor 9 and consequently the current passing the gate G is correspondingly controlled so as to adjust the turning-on time of SCR.
  • a resistor may be theoretically used.
  • the use of a resistor replacement for diode 8 is impractical for this purpose.
  • a non-contact ignition device comprising an A.C. generator including an output circuit, a half-wave rectifier connected in the output circuit of said generator, a primary ignition coil and a silicon controlled rectifier having an anode and a cathode and a gate, the anode-cathode being connected in series with rectifier, a condenser connected between the half-wave rectifier and the primary coil in parallel with said silicon controlled rectifier, a secondary coil coupled to the primary coil for producing a spark upon condenser discharge a constant voltage diode, a resistor connected in series with said diode, and said diode and resistor being connected in parallel with the anode-cathode of the silicon controlled rectifier, and a connection from the junction of the resistor and diode to said gate.
  • An ignition system for an internal combustion engine operative from the engine output shaft comprising, in combination A.C. generator means, means connected to the generator for half-wave rectifying the A.C. output, condenser means connected in parallel with the generator means to be charged by the rectified output, an SCR having an anode and a cathode and a gate, a primary ignition coil, said coil and the anode and cathode of the SCR being connected in series with the rectifying means, secondary ignition coil means for developing a high voltage discharge upon discharge of the condenser means, a switching circuit for the SCR, said circuit comprising a constant voltage diode and a resistor connected in series, and a connection from between the diode and resistor to the gate for supplying a pulse to the gate to turn the SCR References Cited UNITED STATES PATENTS 2,030,228 2/1936 Randolph et a1 123148 2,071,573 2/1937 Randolph et al 123148 2,151,796 3

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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)
US485859A 1964-09-16 1965-09-08 Non-contact ignition device Expired - Lifetime US3367314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5299364 1964-09-16

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US (1) US3367314A (de)
DE (1) DE1464053B1 (de)
GB (1) GB1116809A (de)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446197A (en) * 1965-10-22 1969-05-27 Battelle Development Corp Ignition system for free-piston engine
US3490426A (en) * 1967-07-20 1970-01-20 Tecumseh Products Co Ignition system
US3500809A (en) * 1967-05-09 1970-03-17 Bosch Gmbh Robert Ignition arrangement for internal combustion engines
US3553529A (en) * 1967-05-09 1971-01-05 Bosch Gmbh Robert Condenser discharge type ignition system with a magneto power supply
US3576467A (en) * 1967-08-31 1971-04-27 Penn Controls High voltage spark generator from low voltage supply
US3620200A (en) * 1969-07-08 1971-11-16 Ambac Ind Booster circuit for ignition systems
US3620201A (en) * 1969-10-07 1971-11-16 Glenn B Warren Solid state multispark ignition system
US3623466A (en) * 1969-08-06 1971-11-30 William F Palmer Current transfer electrical system
US3646667A (en) * 1967-11-17 1972-03-07 Tecumseh Products Co Ignition circuit
US3661132A (en) * 1969-12-15 1972-05-09 Tecumseh Products Co Ignition circuit with automatic spark advance
US3677253A (en) * 1970-01-13 1972-07-18 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3703889A (en) * 1969-10-31 1972-11-28 Bosch Gmbh Robert Ignition arrangement for internal combustion engines
US3704700A (en) * 1970-01-20 1972-12-05 Bosch Gmbh Robert Ignition arrangement for internal combustion engines having an alternating current generator
US3718125A (en) * 1971-04-05 1973-02-27 T Posey Capacitor discharge ignition system
JPS49111047A (de) * 1973-02-23 1974-10-23
US3866589A (en) * 1972-03-10 1975-02-18 Bosch Gmbh Robert Semiconductor controlled magneto ignition system for internal combustion engines
US3871348A (en) * 1973-02-07 1975-03-18 Outboard Marine Corp Capacitive discharge ignition system for internal combustion engines
US3880133A (en) * 1972-05-02 1975-04-29 Kokusan Denki Co Breakerless ignition system
US3911887A (en) * 1974-02-19 1975-10-14 Phelon Co Inc Capacitor discharge ignition system
US3933140A (en) * 1973-07-25 1976-01-20 Syncro Corporation Capacitive discharge ignition adapter
US3933139A (en) * 1971-01-22 1976-01-20 The Economy Engine Company Capacitive discharge ignition system
US3941111A (en) * 1973-09-10 1976-03-02 Syncro Corporation Ignition system
US3951122A (en) * 1973-07-07 1976-04-20 Robert Bosch G.M.B.H. Ignition system for internal combustion engine and method to generate ignition pulses
US4029998A (en) * 1975-03-03 1977-06-14 Mcculloch Corporation Capacitor discharge ignition circuit
US4056088A (en) * 1974-04-12 1977-11-01 Syncro Corporation Ignition system
US4141331A (en) * 1972-08-22 1979-02-27 W. R. Grace & Co. Breakerless capacitive discharge ignition system
US4213436A (en) * 1978-09-13 1980-07-22 R. E. Phelon Company, Inc. Capacitor discharge ignition and alternator auxiliary power system
US5069193A (en) * 1989-07-29 1991-12-03 Prufrex-Elektro-Apparatebau Inh. Helga Muller geb. Dutschke Ignition process, arangement and apparatus for internal combustion engines with a magneto
US5954027A (en) * 1996-09-30 1999-09-21 Sanshin Kogyo Kabushiki Kaisha Sensor for engine control
US6191536B1 (en) * 1992-09-11 2001-02-20 Unison Industries, Inc. Solid-state ignition system using true voltage triggering
US20030230938A1 (en) * 2002-06-12 2003-12-18 Ngk Insulators, Ltd. High-voltage pulse generating circuit
US20060120113A1 (en) * 2004-12-07 2006-06-08 Ngk Insulators, Ltd. Electric discharger
US20070145960A1 (en) * 2003-11-21 2007-06-28 Ngk Insulators, Ltd. High voltage pulse generating circuit
US20070242492A1 (en) * 2006-04-18 2007-10-18 Ngk Insulators, Ltd. Pulse generator circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU185966B (en) * 1981-10-09 1985-04-28 Bakony Fem Elektromoskeszulek Electronic ignition system for combustion motors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030228A (en) * 1936-02-11 Spark generating system
US2071573A (en) * 1934-05-28 1937-02-23 Gen Motors Corp Ignition system
US2151796A (en) * 1936-12-31 1939-03-28 Westinghouse Electric & Mfg Co Discharge apparatus
US2203579A (en) * 1940-06-04 Ignition circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277751A (de) * 1962-03-19

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030228A (en) * 1936-02-11 Spark generating system
US2203579A (en) * 1940-06-04 Ignition circuit
US2071573A (en) * 1934-05-28 1937-02-23 Gen Motors Corp Ignition system
US2151796A (en) * 1936-12-31 1939-03-28 Westinghouse Electric & Mfg Co Discharge apparatus

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446197A (en) * 1965-10-22 1969-05-27 Battelle Development Corp Ignition system for free-piston engine
US3500809A (en) * 1967-05-09 1970-03-17 Bosch Gmbh Robert Ignition arrangement for internal combustion engines
US3553529A (en) * 1967-05-09 1971-01-05 Bosch Gmbh Robert Condenser discharge type ignition system with a magneto power supply
US3490426A (en) * 1967-07-20 1970-01-20 Tecumseh Products Co Ignition system
US3576467A (en) * 1967-08-31 1971-04-27 Penn Controls High voltage spark generator from low voltage supply
US3646667A (en) * 1967-11-17 1972-03-07 Tecumseh Products Co Ignition circuit
US3620200A (en) * 1969-07-08 1971-11-16 Ambac Ind Booster circuit for ignition systems
US3623466A (en) * 1969-08-06 1971-11-30 William F Palmer Current transfer electrical system
US3620201A (en) * 1969-10-07 1971-11-16 Glenn B Warren Solid state multispark ignition system
US3703889A (en) * 1969-10-31 1972-11-28 Bosch Gmbh Robert Ignition arrangement for internal combustion engines
US3661132A (en) * 1969-12-15 1972-05-09 Tecumseh Products Co Ignition circuit with automatic spark advance
US3677253A (en) * 1970-01-13 1972-07-18 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3704700A (en) * 1970-01-20 1972-12-05 Bosch Gmbh Robert Ignition arrangement for internal combustion engines having an alternating current generator
US3933139A (en) * 1971-01-22 1976-01-20 The Economy Engine Company Capacitive discharge ignition system
US3718125A (en) * 1971-04-05 1973-02-27 T Posey Capacitor discharge ignition system
US3866589A (en) * 1972-03-10 1975-02-18 Bosch Gmbh Robert Semiconductor controlled magneto ignition system for internal combustion engines
US3880133A (en) * 1972-05-02 1975-04-29 Kokusan Denki Co Breakerless ignition system
US4141331A (en) * 1972-08-22 1979-02-27 W. R. Grace & Co. Breakerless capacitive discharge ignition system
US3871348A (en) * 1973-02-07 1975-03-18 Outboard Marine Corp Capacitive discharge ignition system for internal combustion engines
JPS5819854B2 (ja) * 1973-02-23 1983-04-20 株式会社デンソー ナイネンキカンヨウムセツテンテンカソウチ
JPS49111047A (de) * 1973-02-23 1974-10-23
US3951122A (en) * 1973-07-07 1976-04-20 Robert Bosch G.M.B.H. Ignition system for internal combustion engine and method to generate ignition pulses
US3933140A (en) * 1973-07-25 1976-01-20 Syncro Corporation Capacitive discharge ignition adapter
US3941111A (en) * 1973-09-10 1976-03-02 Syncro Corporation Ignition system
US3911887A (en) * 1974-02-19 1975-10-14 Phelon Co Inc Capacitor discharge ignition system
US4056088A (en) * 1974-04-12 1977-11-01 Syncro Corporation Ignition system
US4029998A (en) * 1975-03-03 1977-06-14 Mcculloch Corporation Capacitor discharge ignition circuit
US4213436A (en) * 1978-09-13 1980-07-22 R. E. Phelon Company, Inc. Capacitor discharge ignition and alternator auxiliary power system
US5069193A (en) * 1989-07-29 1991-12-03 Prufrex-Elektro-Apparatebau Inh. Helga Muller geb. Dutschke Ignition process, arangement and apparatus for internal combustion engines with a magneto
US6191536B1 (en) * 1992-09-11 2001-02-20 Unison Industries, Inc. Solid-state ignition system using true voltage triggering
US5954027A (en) * 1996-09-30 1999-09-21 Sanshin Kogyo Kabushiki Kaisha Sensor for engine control
US20030230938A1 (en) * 2002-06-12 2003-12-18 Ngk Insulators, Ltd. High-voltage pulse generating circuit
US7084528B2 (en) * 2002-06-12 2006-08-01 Ngk Insulators, Ltd. High-voltage pulse generating circuit
US7414333B2 (en) 2002-06-12 2008-08-19 Ngk Insulators, Ltd. High-voltage pulse generating circuit
US20070145960A1 (en) * 2003-11-21 2007-06-28 Ngk Insulators, Ltd. High voltage pulse generating circuit
US7489052B2 (en) 2003-11-21 2009-02-10 Ngk Insulators, Ltd. High voltage pulse generating circuit
US20060120113A1 (en) * 2004-12-07 2006-06-08 Ngk Insulators, Ltd. Electric discharger
US7482786B2 (en) 2004-12-07 2009-01-27 Ngk Insulators, Ltd. Electric discharger using semiconductor switch
US20070242492A1 (en) * 2006-04-18 2007-10-18 Ngk Insulators, Ltd. Pulse generator circuit

Also Published As

Publication number Publication date
GB1116809A (en) 1968-06-12
DE1464053B1 (de) 1970-11-19

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