US3372682A - Spark ignition systems for internal combustion engines - Google Patents

Spark ignition systems for internal combustion engines Download PDF

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Publication number
US3372682A
US3372682A US532639A US53263966A US3372682A US 3372682 A US3372682 A US 3372682A US 532639 A US532639 A US 532639A US 53263966 A US53263966 A US 53263966A US 3372682 A US3372682 A US 3372682A
Authority
US
United States
Prior art keywords
transistor
inductor
transformer
winding
current
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
US532639A
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English (en)
Inventor
Phillips Brian Leslie
Adams Derek Stanley
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3372682A publication Critical patent/US3372682A/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
    • F02P3/06—Other installations having capacitive energy storage
    • F02P3/08—Layout of circuits
    • F02P3/0876—Layout of circuits the storage capacitor being charged by means of an energy converter (DC-DC converter) or of an intermediate storage inductance
    • F02P3/0884—Closing the discharge circuit of the storage capacitor with semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Definitions

  • a transistor is turned on by means driven by the engine, and when it is turned on energy is stored in an inductor in series with the transistor.
  • the transistor is turned off when the current flowing in the inductor reaches a predetermined value, and the energy is then transferred to a capacitor, which when the transistor is turned on again is discharged to produce the spark.
  • a transformer In series with the transistor is a transformer, and the arrangement is such that as the current through the transistor increases, the transformer applies an increasing base drive to the transistor so as to ensure adequate base current in the transistor as the current in the inductor increases.
  • This invention relates to spark ignitions systems for internal combustion engines of the kind in which current flow through inductor is controlled by a transistor, the energy stored in the inductor later being used to produce a spark.
  • a drive circuit for the transistor of a system of the kind specified includes means for initiating conduction of the transistor so that current flows through the transistor, and a feedback transformer for increasing the drive current applied to the base of the transistor as the current flowing through the transistor increases.
  • FIGURE 1 is a circuit diagram illustrating an example of the invention.
  • positive and negative lines 11, 12 which in use are connected to the battery of a vehicle.
  • a storage inductor 13 Connected in a series circuit across the lines 11, 12 are a storage inductor 13, the primary winding 14 of a transformer 15, a diode 16, a transistor 17 and a resistor 18.
  • a point intermediate the inductor 13 and winding 14 is connected through a diode 19 to one end of the primary winding 21 of an ignition transformer 22, the other end of the winding 21 being connected to the line 12 through a controlled rectifier 23.
  • the winding 21 and rectifier 23 are bridged by a capacitor 24, and the secondary winding 25 of the transformer 22 is connected through a distributor 26 to the plugs 27 of the engine in turn.
  • the anode and cathode of the rectifier 23 are interconnected through the cathode and anode of the diode 28.
  • the emitter of the transistor 17 is connected through a resistor 29 to the base of a transistor 31 having its emitter connected to the line 12 and its base and collector connected to the line 11 through resistors 32, 33 respectively.
  • the collector of the transistor 31 is further connected to the base of a transistor 34, the emitter of which is connected to the line 12, and the collector of which is connected to the base of the transistor 31 through a resistor 35, and to the line 11 through the primary winding 36 of a transformer 37 having secondary windings 38, 39.
  • One end of the winding 38 is connected to the emitter of the transistor 17, and its other end is connected to the anode of a Zener diode 41 the cathode of which is connected to the base of the transistor 17 through a resistor 42 and a diode 43 in parallel. Moreover, the base and emitter of the transistor 17 are interconnected through the secondary winding 44 of the transformer 15.
  • One end of the winding 39 is connected to the cathode of the rectifier 23, and its other end is connected to the gate of the rectifier 23 through a capacitor 45, a diode 46 and a resistor 47 in series, the capacitor 45 being bridged by a resistor 48.
  • the current induced in the winding 39 is fed through the series circuit 45, 46, 47 to the gate and cathode of the rectifier 23 to turn it on, and consequently the capacitor 24 discharges through the winding 21 and the rectifier 23. Discharge of the capacitor causes a high to be induced in the secondary winding 25 of the transformer 22, thereby producing the required spark.
  • the resonance of the discharge circuit of the capacitor 24 switches the rectifier 23 oii by reverse biasing it.
  • the current induced in the winding 38 is passed through the resistor 42 to the base and emitter of the transistor 17.
  • the current flowing through resistance 42 is small, but is suflicient to start the transistor 17 conducting.
  • the transistor 17 conducts, its collector-emitter current begins to rise, and the current supplied from the winding 38 would not be suificient to maintain the transistor 17 saturated.
  • feedback is provided by way of the transformer 15 to increase the base drive, and so the transistor 17 is maintained in its saturated condition.
  • the series circuit including inductor 13 remains completed until the voltage across the resistor 18 reaches a predetermined value, the current flowing through the inductor 13 at the moment when the transistor 17 is switched off will be independent of battery voltage, and so the energy transferred to the capacitor 24 will be constant.
  • the base drive for the transistor 17 is provided by the transformer 15 after the initial drive is received from the transformer, 37, this base drive will also be independent of battery voltage.
  • a spark ignition systems for an internal combustion engine comprising in combination (a) a D.C. source (b) a transformer having a primary winding and a secondary Winding, the transformer having the characistic that as the current flow through its primary winding increases, the current flow through its secondary winding increases proportionately (c) a series circuit connected across said DC.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US532639A 1965-03-10 1966-03-08 Spark ignition systems for internal combustion engines Expired - Lifetime US3372682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10329/65A GB1107021A (en) 1965-03-10 1965-03-10 Spark ignition systems for internal combustion engines

Publications (1)

Publication Number Publication Date
US3372682A true US3372682A (en) 1968-03-12

Family

ID=9965857

Family Applications (1)

Application Number Title Priority Date Filing Date
US532639A Expired - Lifetime US3372682A (en) 1965-03-10 1966-03-08 Spark ignition systems for internal combustion engines

Country Status (4)

Country Link
US (1) US3372682A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES324529A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1107021A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6603122A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496921A (en) * 1968-08-01 1970-02-24 Ford Motor Co Capacitive storage ignition system
US3853107A (en) * 1973-01-11 1974-12-10 Eltra Corp Capacitive discharge ignition system
US3903861A (en) * 1972-06-23 1975-09-09 Safe Electronic Systems Electronic circuit by which electric current is fed to spark plugs of an engine
US5056496A (en) * 1989-03-14 1991-10-15 Nippondenso Co., Ltd. Ignition system of multispark type

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847489A (en) * 1958-08-12 Ignition system
US3263124A (en) * 1963-08-14 1966-07-26 Stuermer Karl Solid state capacitor discharge ignition system
US3271593A (en) * 1963-12-05 1966-09-06 Vilbiss Alan J De Internal combustion engine ignition system
US3302629A (en) * 1964-09-21 1967-02-07 Motorola Inc Capacitor discharge ignition system with blocking oscillator charging circuit
US3312211A (en) * 1964-10-13 1967-04-04 Ford Motor Co Ignition system
US3318296A (en) * 1965-02-01 1967-05-09 Motorola Inc Electronic apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847489A (en) * 1958-08-12 Ignition system
US3263124A (en) * 1963-08-14 1966-07-26 Stuermer Karl Solid state capacitor discharge ignition system
US3271593A (en) * 1963-12-05 1966-09-06 Vilbiss Alan J De Internal combustion engine ignition system
US3302629A (en) * 1964-09-21 1967-02-07 Motorola Inc Capacitor discharge ignition system with blocking oscillator charging circuit
US3312211A (en) * 1964-10-13 1967-04-04 Ford Motor Co Ignition system
US3318296A (en) * 1965-02-01 1967-05-09 Motorola Inc Electronic apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496921A (en) * 1968-08-01 1970-02-24 Ford Motor Co Capacitive storage ignition system
US3903861A (en) * 1972-06-23 1975-09-09 Safe Electronic Systems Electronic circuit by which electric current is fed to spark plugs of an engine
US3853107A (en) * 1973-01-11 1974-12-10 Eltra Corp Capacitive discharge ignition system
US5056496A (en) * 1989-03-14 1991-10-15 Nippondenso Co., Ltd. Ignition system of multispark type

Also Published As

Publication number Publication date
GB1107021A (en) 1968-03-20
NL6603122A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-09-12
ES324529A1 (es) 1967-02-01

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