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US3327164A - High-voltage ignition system for internal combustion engines - Google Patents

High-voltage ignition system for internal combustion engines Download PDF

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Publication number
US3327164A
US3327164A US425308A US42530865A US3327164A US 3327164 A US3327164 A US 3327164A US 425308 A US425308 A US 425308A US 42530865 A US42530865 A US 42530865A US 3327164 A US3327164 A US 3327164A
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US
United States
Prior art keywords
ignition
diode
resistor
cathode
voltage
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
US425308A
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English (en)
Inventor
Steinberg Diedrich
Sohner Gerhard
Waiblingen Kreis
Issler Jorg
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
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Publication of US3327164A publication Critical patent/US3327164A/en
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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
    • F02P3/02—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

Definitions

  • the invention relates to a rectifier controlled high-voltage ignition system having a diode and resistor in 4parallel connection between the control electrode of the rectifier and a storage system connected to one pole of the source.
  • This invention relates to a high-voltage ignition system for internal combustion engines, and, more particularly, to a control device for controlling a transistor ignition system.
  • a semiconductor device is connected in series with the primary winding of an ignition coil and a source of direct current, which is usually the battery of the internal combustion engine, and a device for controlling the semiconductor device is provided which operates at a cyclic frequency determined by the speed of the engine.
  • transistors are provided in place of the previously used cam-actuated circuit breakers. These transistors are connected in series with the primary winding of the ignition coil; at the instant of ignition, the transistor is switched to its blocked state, interrupting the current in the primary ofthe ignition coil. During this process, a substantial inductive voltage peak is generated across the transistor, necessitating the use of special measures to protect the transistor against voltage breakdown.
  • a capacitor is used in conjunction with semiconductor thyratrons, the voltage sensitivity of which is substantially less.
  • the semiconductor thyratrons are generally connected, together with the primary winding, in the discharge circuit of a storage capacitor supplying the ignition energy.
  • the storage capacitor is charged between sequential ignitions and discharged during ignition.
  • a coil ignition system of the type described in the introduction in which the ignition energy is supplied by the electromagnetic lield of the ignition coil, by providing a semiconductor thyratron-or thyristor-particularly a silicon thyristor, as the semiconductor device, which thyristor is connected by its two primary electrodes in series with the primary winding of the coil.
  • This thyristor can be switched in by a positive control voltage at its control electrode and can be switched oil by a negative control voltage.
  • an electrical energy storage element such as a capacitor, and/or an electromagnetic energy storage element, such as an iron-cored choke coil, is provided in a circuit connected in parallel to the control electrode and a primary electrode of the thyratron for supplying a negative control current at the instant of ignition.
  • FGURE 1 shows, in schematic, an ignition system designed according to the present invention.
  • FIGURE 2 is a circuit schematic showing the elec ⁇ trical circuit diagram of the ignition system of FIGURE l.
  • FIGURES 3 to 7 are circuit schematics showing several further embodiments of the invention.
  • FlGURE l shows a coil ignition system for operating a four cylinder, four-cycle internal combustion engine.
  • the System includes a distributor 1i), incorporating a circuit breaker, an ignition coil 11 and a switching device 12.
  • Four ignition wires 14 leading from the distributor 10 are connected to respective spark plugs 13, and a storage battery 15' supplies current to the system.
  • Such storage batteries are usually rated at about 12.6 volts.
  • Switching device 12 contains a silicon thyristor 2G of the pnpn-type, the anode 21 of which is connected through a compensating resistor 22 of about 0.5 to 2 ohms, to the primary winding 23 of ignition coil 11.
  • the cathode 24, which is connected with the exteriorly located n-Zone on the silicon body of the thyratron, is connected directly to ground.
  • a semiconductor diode 26 in parallel with a resistor 27 is connected to the control electrode 25 of the thyratron, and to control line 23, leading to the stationary contact 29 of the circuit breaker provided in distributor 10.
  • the armature 30 of this circuit breaker is lifted off stationary contact 29 twice during each revolution of the engine by means of a cam 32 coupled with the rotating distributor ar-m 31.
  • a tank circuit comprising a capacitor 36 and a choke coil 35, in parallel with a Zener diode 37, is connected between the positive lead 17 and, through a resistor 31tto control line 2S.
  • the choke 3S has an iron core 38, and an inductance of about 0.5 mh. acts as an energy storage means.
  • the thyratron 20 allows a magnetizing current to ilow through the primary coil 23 as soon as armature 30 contacts the stationary contact 29 since this allows a positive control current to flow in the circuit comprising choke 35, resistor 34 and resistor 27.
  • the magnetizing current in the choke coil 35 limited in magnitude by resistor 34, produces a magnetic lield in the iron core 38 of the choke.
  • the energy of this magnetic eld is used to block the thyratron 20 as soon as the armature 30 has lifted from Contact 29; this substantially cuts the magnetizing current formerly present.
  • the Zener diode Y limits the control voltage whichis produced atY choke 35 'and which is increased by the resonance effect of the parallel-connected capacitor 36, to a maximum value which can not damage the ⁇ control electrode of the thyratron 20.
  • the diode 26 insures that the inductive switching-off voltage at choke 35 is fully effective at the control electrode.
  • the value of the switching-olf voltage is limited, just as in the case of the embodiment of FIGURES 1 and 2, by a Zener diode 37 and a further diode 40 connected in series with it. Diode 40 insures that the Zener diode 37 becomes conductive only during the negative half-cycles of the control voltage.
  • FIGURE 4 shows a particularly simple circut since only a capacitor42, inserted in the lead connecting control electrode 25 of the thyratron to the stationary Contact 29 of the breaker, is used as an energy storage means for switching off the thyratron 20.
  • a relatively high resistance 43 is connected between contact 29 and line 17;
  • the capacitor 42 has the same effect as in the above-described embodiment; however, it is connected between the breaker arm and the junction point of resistor 26 and diode27. Stationary contact 29 is connected to the positive line 17. A resistor 45 is connectedbetween the breaker arm 30 and the ground yline 44. When the circuit breaker 29, 30, isv closed,
  • the capacitor 42 is charged. Its charging current, which iows through resistor 26 and control electrode 25, places the thyratron 2l) in its conductive state. As the instant when circuit breaker 29, 30, ⁇ opens, which happens at the instant of ignition, the capacitor 42is connected in series with the cathode of the thyratron via resistor 45. Capacitor 42 can then discharge through the control electrode 25 and the kdiode 27, and the discharge current so produced blocks the thyratron.
  • the inductance of choke 35 can be lower, in the embodiment of FIGURE 6, than that in those shown in FIGURES 2 and 3.
  • the circuit arrangement of the thyratron 20 'and resistor 27 (provided in the control circuit of the thyratron in parallel with rectifier 26), as well as the tank circuit comprising choke 35 and capacitor 36, corresponding to the embodiment of FIGURE 3.
  • a contactless circuit breaker is provided in place of the cam-actuated mechanical circuit breaker 29, 30.
  • This contactless circuit breaker includes two transistors 50 and 51.
  • Transistor 51 is connected through emitter resistor 52 to the positive lead 17, in such a manner that in its conductive state, it provides a magnetizing current through the choke 35 and a positive control current which switches thyratron 2t) into its conduc-tive state.
  • This transistor is switched into cut-off, thereby triggering the ignition process, when the two permanent magnets 55 and 56, which may be mounted on a rotating disc 54 (shown in phantom lines) pass by a semiconductor resistor 57.
  • the forward resistance of resistor 57 increases by a factor of 10 to 15 under the iniluence of the magnetic iield indicated by arrows when the magnets reach the ignition position illustrated in FIG- URE 7.
  • the semiconductor resistor 57 is connected .in the base circuit of transistor k50, the emitter of which is directly connected to the positive lead 17.
  • ⁇ A resistor 58 is connected between the base of transistor 50 and ground; the resistance of this resistor is great enough to maintain transistor 50 in cut-oft until the magnets have reached their illustrated position.
  • transistor 5t becomes conductive and thus switches transistor 51' into cut-off; the latter then interrupts the magnetizing current in choke 35 and, as described above in connection with FIGURE 3, blocks the thyratron 20.
  • the control disc 54 on which magnets 55 and 56 are mounted, can be provided in a conventional distributor housing 10, if desired, together With the two switching transistors 50 and 51.
  • a high-voltage ignition arrangement for an internal combustion engine comprising, in combination, an ignition coil having a primary winding and a secondary winding for providing a high-voltage ignition pulse; a direct-current source having one pole connected to said primary winding; a controlled semiconductor rectier with anode connected to said primary and secondary windings of said ignition coil, the cathode of said controlled rectifier being connected to the other pole of said direct-current source for interrupting the circuit to said primary winding, said rectifier being conductive w-hen a positive potential prevails at its control electrode and being non-conductive when a negative potential prevails at its electrode; a diode with anode connected to the control electrode of said controlled rectifier; a resistor connected in parallel with said diode; energy storage means connected between the cathode of said diode and said direct-current power source; and circuit interrupting means driven by said engine and connecting the cathode of said diode periodically to said other pole of said direct-current source, whereby said highvoltage ignition pulse is provided when said
  • the high-voltage ignition arrangement as defined in claim 2 including a capacitor connected in parallel with said induction coil.
  • the high-voltage ignition arrangement as defined in claim 2 including at least one diode connected in parallel with said induction coil and having its anode connected to the negative terminal of said direct-current source.
  • the high-Voltage ignition arrangement as defined in claim 2 including a limiting resistor connected in series with the parallel combination of said diode and said resistor.
  • the high-voltage ignition arrangement as defined in claim 2 including a capacitor connected between said induction coil and the parallel combination of said diode and said resistor.
  • said energy storage means is a capacitor having one electrode connected to the parallel combination of said diode and said resistor, and having the other electrode connected to said interrupting means.
  • the high-voltage ignition arrangement as defined in claim 8 including a resistor connected between the cathode of said controlled semi-conductor rectifier and said other electrode of said capacitor.
  • circuit interrupting means is a cam actuated switch operated by the distributor of said internal combustion engine.
  • circuit interrupting means comprises a magnetic responsive resistor providing resistance varying with the intensity of the magnetic field in contact therewith; magnetic means movable past said magnetic responsive resistor for varying the magnitude of the resistance of said magnetic-responsive resistor; and a transistor connected to said magnetic-responsive resistor and actuated thereby through the variations in the resistance magnitude of said magnetic-responsive resistor resulting from the motion of said magnetic means.

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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)
US425308A 1964-01-18 1965-01-13 High-voltage ignition system for internal combustion engines Expired - Lifetime US3327164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB75044A DE1242051B (de) 1964-01-18 1964-01-18 Hochspannungszuendeinrichtung

Publications (1)

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US3327164A true US3327164A (en) 1967-06-20

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Application Number Title Priority Date Filing Date
US425308A Expired - Lifetime US3327164A (en) 1964-01-18 1965-01-13 High-voltage ignition system for internal combustion engines

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US (1) US3327164A (de)
DE (1) DE1242051B (de)
GB (1) GB1089666A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749973A (en) * 1970-12-22 1973-07-31 Texaco Inc Continuous wave high frequency ignition system
US3989023A (en) * 1974-06-07 1976-11-02 Eltra Corporation Triggering rotor and sensor assembly
US4109632A (en) * 1976-11-01 1978-08-29 Rca Corporation GTO Ignition circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924633A (en) * 1954-03-27 1960-02-09 Siemens Ag Ignition system for internal combustion engines
US3195043A (en) * 1961-05-19 1965-07-13 Westinghouse Electric Corp Hall effect proximity transducer
US3213320A (en) * 1962-04-05 1965-10-19 Gen Motors Corp Ignition system having a controlled rectifier
US3260251A (en) * 1963-08-31 1966-07-12 Bosch Gmbh Robert Battery ignition system for internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE547009A (de) * 1955-03-17
FR1170981A (fr) * 1957-04-08 1959-01-21 Ducellier Ets Système d'allumage électronique pour moteurs à explosion
FR1237802A (fr) * 1959-06-22 1960-08-05 Csf Perfectionnements à l'allumage électronique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924633A (en) * 1954-03-27 1960-02-09 Siemens Ag Ignition system for internal combustion engines
US3195043A (en) * 1961-05-19 1965-07-13 Westinghouse Electric Corp Hall effect proximity transducer
US3213320A (en) * 1962-04-05 1965-10-19 Gen Motors Corp Ignition system having a controlled rectifier
US3260251A (en) * 1963-08-31 1966-07-12 Bosch Gmbh Robert Battery ignition system for internal combustion engines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749973A (en) * 1970-12-22 1973-07-31 Texaco Inc Continuous wave high frequency ignition system
US3989023A (en) * 1974-06-07 1976-11-02 Eltra Corporation Triggering rotor and sensor assembly
US4109632A (en) * 1976-11-01 1978-08-29 Rca Corporation GTO Ignition circuit

Also Published As

Publication number Publication date
GB1089666A (en) 1967-11-01
DE1242051B (de) 1967-06-08

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