US3902471A - Ignition system for internal combustion engines - Google Patents

Ignition system for internal combustion engines Download PDF

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Publication number
US3902471A
US3902471A US431832A US43183274A US3902471A US 3902471 A US3902471 A US 3902471A US 431832 A US431832 A US 431832A US 43183274 A US43183274 A US 43183274A US 3902471 A US3902471 A US 3902471A
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US
United States
Prior art keywords
transistor
ignition coil
primary winding
ignition
ignition system
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
US431832A
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English (en)
Inventor
Heinrich-Josef Brungsberg
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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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Filing date
Publication date
Priority claimed from DE19732303087 external-priority patent/DE2303087C3/de
Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of US3902471A publication Critical patent/US3902471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
    • F02P3/051—Opening or closing the primary coil circuit 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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/026—Distributors combined with other ignition devices, e.g. coils, fuel-injectors

Definitions

  • the current-flow through the primary winding of an ignition coil of an ignition system for internal combustion engines is controlled by a pair of cascadeconnected transistors each provided with negative feedback means for stabilizing the current flow in the primary winding of the ignition coil.
  • Additional control means include'a thermally controlled resistor in the control circuit of one of said transistors arranged in heat-exchanging relation with the other of said pair of transistors so as to reduce the current flow through said pair of transistors and through said primary winding of said ignition coil in response to an undue increase of temperature of one of the transistors.
  • This invention refers to ignition systems for internal combustion'engines including a d-c power supply, an interrupter. an ignition coil and at least one semiconductor switching device provided with a currentlimiting resistor. Interruption by the interrupter of the charging current flowing through the primary winding of the ignition coil releases the magnetic energy stored in the coil which then generates a high voltage in the secondary winding of the ignition coil. This high voltage is required to fire the spark plugs, thus igniting the compressed explosive mixture of air and gas within the cylinder, or cylinders, of the internal combustion engine.
  • Ignition systems for internal combustion engines generally include an ignition switch which, when its contacts are closed, establishes a circuit including the power supply or battery, the primary winding of the ignition coil and the interrupter for interrupting said circuit periodically.
  • the d-c current supplied by the battery establishes a magnetic field in the ignition coils which collapses suddenly when the interrupter opens the circuit.
  • the interrupter is operated by a cam which is mounted on the shaft of the distributor of the ignition system.
  • the interrupter interrupts the current which energizes the primary winding of the ignition coil.
  • the current energizing the primary cir cuit of the ignition coil is switched on and switched off by means of a transistor.
  • the interrupter having relatively movable contacts switches the base current, or control current. of the aforementioned transistor, which current is of a relatively small magnitude and does not tend to cause erosion of the contacts of the interrupter.
  • the present invention refers to an ignition system of the aforementioned kind including a switching transistor for controlling the primary circuit of the ignition coil.
  • Prior art ignition systems of the aforementioned kind including a transistor are subject to the drawback, or limitation, that the power available for ignition depends largely upon the voltage of the power supply or battery. It is true that the magnitude of the charging current, or primary current, is largely determined by the constants of the primary circuit.
  • the primary current may be high and protracted and result in a far reaching discharge of the battery.
  • such ignition systems for internal combustion engines are not capable of providing a substantially constant energy of ignition.
  • Another object of the invention is to provide ignition systems. for internal combustion engines wherein the secondary voltage of the ignition coil is substantially constant over the entire range of number of revolutions per minute at which the internal combustion engine may be operated.
  • SUMMARY OF THE INVENTION lnition systems embodying; this invention include a transistor connected to be energized by a d-c power supply and an interrupter having relatively movable contacts arranged in the control circuit of said transistor for controlling the current. flow through said transistor.
  • the transistor is provided with negative feed-back means for stabilizing the magnitude of said current flow through said transistor.
  • Systems embodying this invention further include an ignition coil having a primary winding and a secondary winding and an additional transistor cascade connected to said transistor and con trolling the current flow through said primary winding of said ignition coil.
  • the additional transistor is provided with additional negative feed-back means for stabilizing the magnitude of the current flowing through said additional transistor and energizing said primary winding of said ignition coil.
  • FIG. I is a wiring diagram of an ignition system for internal combustion engines embodying this invention.
  • FIG. 2 is a vertical section of a structure embodying this invention taken along IIII of FIG. 3;
  • FIG. 3 is a topplan view of the structure shown in FIG. 2.
  • reference numeral 1 has been applied to indicate the interrupter of the ignition system.
  • This interrupter controls the flow of current in a circuit which includes the positive pole of battery 2, the negative feedback resistor 3, the emitter 4a and the base 412 of transistor 4, thermally controlled resistor 5, resistor 6 and the mass of the internal combustion engine, or the neg-- ative pole of the battery 2, respectively.
  • a flow of current is established in a circuit which includes the positive pole of the battery 2, the negative feed-back resistor 3, the emitter 4a and the collector 4c of transistor 4, the base 7b and the emitter 7a of transistor 7, the negative feed-back resistor 8 and the negative pole of the battery 2.
  • the magnetic energy L/2 I which depends upon the maximum current flowing in the primary circuit of the induction coil 9 is transformed into electric energy in the secondary winding 9b of ignition coil 9 incident to opening of the contacts of the interrupter 1 and de-energization of transistors 4 and 7.
  • Reference characters 11 and 12 have been applied to indicate a pair of Zener diodes of which the former is operatively related to transistor 4 and the latter is operatively related to transistor 7.
  • the object of Zener diodes ll and 12 is to stabilize the load current of both transistors 4 and 7.
  • the base 4b of transistor 4 is conductively connected to the anode of Zener diode 11, and the cathode of the latter is connected to the positive pole of battery 2.
  • the base 7b of transistor 7 is conductively connected to the cathode of Zener diode 12 and the anode of the latter is conductively connected to the negative pole of battery 2.
  • the ignition system embodying this invention includes two currentstabilizing circuits, namely first Zener diode 11 and negative feed-back resistor 3 and transistor 4, and second Zener diode 12, negative feed-back resistor 8 and transistor 7.
  • the peak values of the base currents and consequently the ignition energy in the secondary circuit of the ignition coil is substantially stabilized by means of the aforementioned current stabilizing circuits so as to substantially eliminate effects of variations of the voltage of the power supply or battery 2.
  • Reference numeral 13 has been applied to indicate a third Zener diode in the ignition system embodying this invention.
  • the cathode of Zener diode 13 is conductively connected to a tap provided on the primary winding 9a of ignition coil 9 and the anode of Zener diode 13 is conductively connected to the negative pole of battery 2.
  • Zener diode 13 limits the blocking voltage of transistor 7 and consequently the ignition voltage of the ignition system.
  • Transistor 7 is thermally coupled, i.e. arranged in heat exchanging relation, with resistor 5. When the temperature of resistor is raised on account of excessive current flow through transistor 7, the resistance of the resistor 5 increases on account of its positive coefficient of temperature.
  • the increase of the resistance of resistor 5 results in a decrease of the flow of current through transistor 4 which, in turn, reduces the base current flowing through transistor 7.
  • the losses in the circuitry are decreased in proportion to the square of the decrease of the current flowing through transistor 7.
  • the losses in the circuitry are decreased in proportion to the square of the decrease of the current and permissible current and temperature ceilings are maintained.
  • reference numeral 14 has been applied to indicate a fourth Zener diode shunted across a capacitor 15 which, in turn, is shunted across the two poles of the battery or power supply 2. This arrangement of parts provides protection against voltage spikes originating in the circuitry which is intended to charge the power supply or battery 2.
  • Coupling resistor 20 interconnects the base 71) and the emitter 7a of transistor 7.
  • the secondary circuit of ignition coil 9 includes resistor 16 and meter 24. That circuit further includes resistors 25, 26 and a spark gap 22 forming part of the distributor. Spark plug 21 is shunted by resistor 23 and by capacitor 27.
  • FIGS. 2 and 3 all the parts 3 to 20 shown in FIG. 1 are arranged in a common housing to which reference character 28 has been applied, ie the same reference character as has been applied to the dashand-dotted rectangle of FIG. 1.
  • the arrangement of parts shown in FIGS. 2 and 3 dispenses with the separate housing means for the ignition coil 9 provided in conventional ignition systems for internal combustion engines.
  • Reference numeral 28a has been applied to indicate a partition inside of housing 28 separating the same into a control circuitry compartment shown at the left of FIG. 2 and an ignition coil compartment shown at the right of FIG. 2.
  • the latter is provided with an insulating bushing 29 for connecting secondary winding 9b of coil 9 to the distributor which, in turn, is connected to the spark plugs 21.
  • an ignition system for internal combustion engines energized by a d-c power source the combination of a. an ignition coil having a primary winding and a secondary winding;
  • a first transistor for controlling the current flow in said primary winding of said ignition coil, said primary winding of said ignition coil being arranged in the collector-emitter circuit of said first transistor in series with a first negative feedback resistor;
  • a second transistor having a collector conductively connected to the base of said first transistor, the emitter of said second transistor being conductively connected to a d-c power supply by the intermediary of a second negative feedback resistor;
  • An ignition system specified in claim 1 including a third Zener diode connected across a portion of said primary winding of said ignition coil to limit the magnitude of voltage spikes that may occur in said portion of said primary winding of said ignition coil.
  • An ignition system as specified in claim 1 including a thermally controlled resistor arranged to reduce the base current in said second transistor upon increase of the ambient temperature of said resistor.
  • An ignition system as specified in claim 6 including a housing being separated by an internal partition into two compartments, one of said compartments housing said first and second transistor, said first and second Zener diode and said additional electronic components, and the other'of said compartments housing said ignition coil.
  • An ignition system for internal combustion engines 6 energized by a d-c power supply including a. a transistor connected to be energized by said d-c power supply;
  • an ignition coil having a primary winding and a secondary winding
  • additional negative feedback means for stabilizing the magnitude of current flowing through said additional transistor and energizing said primary winding of said ignition coil.
  • An ignition system as specified in claim 8 including a resistor having a positive coefficient of temperature arranged in said control circuit of said transistor and in heat exchanging relation with said additional transistor to reduce the current flow through said primary winding of said ignition coil in response to an increase of the operating temperature of said additional transistor.

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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)
US431832A 1973-01-23 1974-01-09 Ignition system for internal combustion engines Expired - Lifetime US3902471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732303087 DE2303087C3 (de) 1973-01-23 Zündsystem für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3902471A true US3902471A (en) 1975-09-02

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ID=5869673

Family Applications (1)

Application Number Title Priority Date Filing Date
US431832A Expired - Lifetime US3902471A (en) 1973-01-23 1974-01-09 Ignition system for internal combustion engines

Country Status (6)

Country Link
US (1) US3902471A (fr)
JP (1) JPS49104037A (fr)
CH (1) CH568479A5 (fr)
FR (1) FR2324891A1 (fr)
GB (1) GB1451394A (fr)
IT (1) IT1003455B (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420041A1 (fr) * 1978-03-18 1979-10-12 Bosch Gmbh Robert Dispositif d'allumage pour moteurs a combustion interne
US4177782A (en) * 1976-11-01 1979-12-11 Hitachi, Ltd. Ignition system providing sparks for two ignition plugs in each cylinder from a single ignition coil
US4198943A (en) * 1977-05-05 1980-04-22 Robert Bosch Gmbh Composite electronic ignition system structure
US4245610A (en) * 1977-05-25 1981-01-20 Hitachi, Ltd. Ignition apparatus for internal combustion engine
US4248201A (en) * 1977-09-30 1981-02-03 Hitachi, Ltd. Molded ignition device
US4380989A (en) * 1979-11-27 1983-04-26 Nippondenso Co., Ltd. Ignition system for internal combustion engine
US4495931A (en) * 1982-08-05 1985-01-29 Robert Bosch Gmbh Engine ignition system
EP0156917A1 (fr) * 1983-09-09 1985-10-09 Hitachi, Ltd. Dispositif d'allumage a energie elevee
FR2571440A1 (fr) * 1984-10-04 1986-04-11 Magneti Marelli Spa Structure de module electronique et son montage sur le distributeur de moteurs a combustion interne
US4665922A (en) * 1982-07-09 1987-05-19 Saab-Scania Aktiebolag Ignition system
EP0359851A1 (fr) * 1988-09-21 1990-03-28 Mitsubishi Denki Kabushiki Kaisha Installation d'allumage pour moteur à combustion interne
WO1990004717A1 (fr) * 1988-10-26 1990-05-03 Robert Bosch Gmbh Dispositif comportant une bobine d'allumage et un appareil de connexion de bobine d'allumage
US4928660A (en) * 1988-04-02 1990-05-29 Robert Bosch Gmbh Protective case for combination ignition coil and electronic control
US4951641A (en) * 1989-02-23 1990-08-28 Mitsubishi Denki Kabushiki Kaisha Ignition coil assembly structure for an internal combustion engine
US5003959A (en) * 1988-10-07 1991-04-02 Mitsubishi Denki Kabushiki Kaisha Ignition coil unit for an internal combustion engine
EP1431573A1 (fr) * 2002-12-20 2004-06-23 Volkswagen Aktiengesellschaft Circuit pour la suppression de bruit en un système d'allumage de véhicule à moteur
CN111852718A (zh) * 2019-04-24 2020-10-30 半导体元件工业有限责任公司 线圈电流控制电路、点火系统及用于使线圈放电的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127369U (fr) * 1980-02-26 1981-09-28
EP1284362B1 (fr) * 2000-05-26 2005-07-27 Hitachi, Ltd. Dispositif d'allumage pour moteur combustion interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291110A (en) * 1965-09-02 1966-12-13 Jasper N Cunningham High voltage circuit for automobile engine ignition
US3424142A (en) * 1966-11-09 1969-01-28 Ford Motor Co Oscillator controlled electronic ignition system
US3575154A (en) * 1969-06-09 1971-04-20 Motorola Inc Constant-energy ignition systems
US3605713A (en) * 1970-05-18 1971-09-20 Gen Motors Corp Internal combustion engine ignition system
US3727071A (en) * 1970-11-05 1973-04-10 G Moran Impulse generator to ignite combustion engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291110A (en) * 1965-09-02 1966-12-13 Jasper N Cunningham High voltage circuit for automobile engine ignition
US3424142A (en) * 1966-11-09 1969-01-28 Ford Motor Co Oscillator controlled electronic ignition system
US3575154A (en) * 1969-06-09 1971-04-20 Motorola Inc Constant-energy ignition systems
US3605713A (en) * 1970-05-18 1971-09-20 Gen Motors Corp Internal combustion engine ignition system
US3727071A (en) * 1970-11-05 1973-04-10 G Moran Impulse generator to ignite combustion engines

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177782A (en) * 1976-11-01 1979-12-11 Hitachi, Ltd. Ignition system providing sparks for two ignition plugs in each cylinder from a single ignition coil
US4198943A (en) * 1977-05-05 1980-04-22 Robert Bosch Gmbh Composite electronic ignition system structure
US4245610A (en) * 1977-05-25 1981-01-20 Hitachi, Ltd. Ignition apparatus for internal combustion engine
US4248201A (en) * 1977-09-30 1981-02-03 Hitachi, Ltd. Molded ignition device
US4195611A (en) * 1978-03-18 1980-04-01 Robert Bosch Gmbh Consolidated ignition transformer and circuit assembly for an internal combustion engine ignition system
FR2420041A1 (fr) * 1978-03-18 1979-10-12 Bosch Gmbh Robert Dispositif d'allumage pour moteurs a combustion interne
US4380989A (en) * 1979-11-27 1983-04-26 Nippondenso Co., Ltd. Ignition system for internal combustion engine
US4665922A (en) * 1982-07-09 1987-05-19 Saab-Scania Aktiebolag Ignition system
US4495931A (en) * 1982-08-05 1985-01-29 Robert Bosch Gmbh Engine ignition system
EP0156917A1 (fr) * 1983-09-09 1985-10-09 Hitachi, Ltd. Dispositif d'allumage a energie elevee
EP0156917A4 (fr) * 1983-09-09 1986-02-10 Hitachi Ltd Dispositif d'allumage a energie elevee.
FR2571440A1 (fr) * 1984-10-04 1986-04-11 Magneti Marelli Spa Structure de module electronique et son montage sur le distributeur de moteurs a combustion interne
US4928660A (en) * 1988-04-02 1990-05-29 Robert Bosch Gmbh Protective case for combination ignition coil and electronic control
EP0359851A1 (fr) * 1988-09-21 1990-03-28 Mitsubishi Denki Kabushiki Kaisha Installation d'allumage pour moteur à combustion interne
US5003959A (en) * 1988-10-07 1991-04-02 Mitsubishi Denki Kabushiki Kaisha Ignition coil unit for an internal combustion engine
WO1990004717A1 (fr) * 1988-10-26 1990-05-03 Robert Bosch Gmbh Dispositif comportant une bobine d'allumage et un appareil de connexion de bobine d'allumage
US4951641A (en) * 1989-02-23 1990-08-28 Mitsubishi Denki Kabushiki Kaisha Ignition coil assembly structure for an internal combustion engine
EP1431573A1 (fr) * 2002-12-20 2004-06-23 Volkswagen Aktiengesellschaft Circuit pour la suppression de bruit en un système d'allumage de véhicule à moteur
CN111852718A (zh) * 2019-04-24 2020-10-30 半导体元件工业有限责任公司 线圈电流控制电路、点火系统及用于使线圈放电的方法

Also Published As

Publication number Publication date
DE2303087A1 (de) 1974-09-05
DE2303087B2 (de) 1976-01-15
FR2324891A1 (fr) 1977-04-15
JPS49104037A (fr) 1974-10-02
IT1003455B (it) 1976-06-10
GB1451394A (en) 1976-09-29
CH568479A5 (fr) 1975-10-31

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