US3234430A - Ignition circuit for internal combustion engines which prevents ignition skipping - Google Patents

Ignition circuit for internal combustion engines which prevents ignition skipping Download PDF

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Publication number
US3234430A
US3234430A US290451A US29045163A US3234430A US 3234430 A US3234430 A US 3234430A US 290451 A US290451 A US 290451A US 29045163 A US29045163 A US 29045163A US 3234430 A US3234430 A US 3234430A
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United States
Prior art keywords
storage capacitor
capacitor means
main
circuit
auxiliary storage
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Expired - Lifetime
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US290451A
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English (en)
Inventor
Issler Jorg
Sohner Gerhard
Lange Gerhard
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • F02P9/007—Control of spark intensity, intensifying, lengthening, suppression by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition
    • 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
    • F02P3/005—Other installations having inductive-capacitance energy storage
    • 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
    • F02P3/0807—Closing the discharge circuit of the storage capacitor with electronic switching means
    • F02P3/0838—Closing the discharge circuit of the storage capacitor 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
    • F02P3/06—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
    • 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
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression

Definitions

  • the present invention concerns an ignition circuit arrangement for internal combustion engines, and more particularly that type of such arragements in which a storage capacitor is used that is either operatively connected directly with the spark plugs of the engine via switch means including a distributor or is inductively coupled with the spark plugs via said switch means by interposition of an ignition transformer.
  • capacitor-type ignition arrangements display a high igniting power sufiicient for producing sparks at the spark plugs even if the spark plug electrodes are more or less contaminated or covered with carbon deposits.
  • the known capacitor-type ignition arrangements are not always capable of igniting such mixtures without occasional skipping.
  • the invention includes in a capacitive circuit arrangement for internal combustion engines, including at least one spark plug and switch means for periodically closing an operative circuit for the spark plug, in combination, main storage capacitor means operatively connected with said spark plug subject to control by said switch means; at least one auxiliary storage capacitor means connected in parallel with said main storage capacitor means; choke coil means connected between said main and auxiliary storage capacitor means; and means for charging said main and auxiliary storage capacitor means to a predetermined potential, whereby every time when by said switch means an operative circuit is established for said spark plug, first said main storage capacitor means is discharged therethrough and thereafter said auxiliary storage capacitor means is discharged therethrough with a delay depending upon said choke coil means.
  • FIG. 1 is a schematic circuit diagram illustrating a capacitive ignition circuit arrangement according to the invention
  • FIG. 2 is a graph illustrating the variation with time of the voltage at a spark plug electrode during one ignition phase as produced by the arrangement according to the invention
  • FIG. 3 is a schematic circuit diagram of a modification of the arrangement of FIG. 1;
  • FIG. 4 is a schematic circuit diagram illustrating another modification of the arrangement according to FIG. 1.
  • the ignition circuit arrangement comprises a main storage capacitor 10 of e.g. -.5 t. which is continuously subject to being charged by a charging circuit 11 to a potential of 300 to 500 volts.
  • the charging circuit 11 is supplied by a storage battery 12.
  • the discharge voltage of the capacitor 10 is increased by an ignition transformer 13 to about 15,000 to 20,000 volts.
  • a conventional control switch 14 is connected in circuit with the main capacitor 10 and the primary winding of the transformer 13 and is periodically moved between open and closed positions in a conventional manner by the action of a four-lobe cam 16 rotating jointly with the wiper arm 17 of the conventional distributor. In the illustrated position of the switch 14 the circuit between the capacitor 10 and ground is interrupted and the capacitor 10 is being charged.
  • auxiliary storage capacitors 18 of e.g. .5 f. each are connected in parallel with the main capacitor 10 on the primary side of the transformer 13.
  • choke coils 19 having an inductivity of e.g. .2 to .3 mh. are arranged as shown in FIG. 1.
  • the capacitors 18 and the coils 19 constitute a delay line by which after the discharge of the main capacitor 10 additional discharges and consequently voltage pulses at the spark plugs 16 are produced.
  • the oscillogram according to FIG. 2 illustrates how the igniting voltage U varies with time during one igni tion phase produced by the arrangement according to the invention.
  • the first voltage peak corresponds to the discharge of the main storage capacitor 10, while the following voltage peaks correspond to the successive following discharges of the auxiliary storage capacitors 18.
  • the delays between the first and second voltage peak as well as between the second and third voltage peak depends on the action of the choke coils 19.
  • the dotted line appearing at the end of the first voltage peak illustrates how the voltage would drop off if the auxiliary capacitors 18 and the choke coils 19 would not exist in the arrangement..
  • the main capacitor 21 but onthe secondary sidev of the transformer 20 and also in circuit with the distributor 23.
  • the secondary is conductively connected with the primary winding of the transformer 20'.
  • the main capacitor 21 as well as the auxiliary capacitors 25-27 can be charged simultaneously by a conventional charging circuit 31 to a charge potential of e .g. 2,000 to 3,000 volts.
  • the operation of this arrangement is quite analogous to the one described above.
  • the switch 22 is moved to closed position'so as to cause a discharge of the main capacitor 21, a sequence. of secondary discharges of the auxiliary capacitors 25-217 in succession follows automatically as the area between the spark plug electrodes has been ionized by the first spark resulting from the first discharge of the main capacitor 21.
  • FIG. 4 illustrates another modification of the. invention
  • an arrangement which does not include an ignition transformer
  • a main storage capacitor w is directly'connected to the distributor 48 which actuates in the conventional manner the spark plugs 49.
  • the main capacitor may have acap acity of .1 i.
  • a delay line is provided and comprises three auxiliary capacitors 4446 togetherwith choke coils 4143 arranged in parallel' with the main storage capacitor 40 as shown in FIG. 4.
  • the choke coils. 41-43 may have each an inductivity of three to five mh.
  • auxiliary capacitors may have a capacity of .0' 1 tf, h v a p e
  • a charging circuit'47 is provided which is capable of charging the capacitors to a potential of 3,000 to 5,000Volts.
  • The, distributor 48 maybe of conventional type which is suitable for handling the above-mentioned high voltages. As the wiper of the distributor 48 rotates discharge of the capacitors 4i and 4446 in succession is initiated whenever the wiper arm' ofithe distributor is, in contact with one of the stationary contacts connected with the various spark plugs 49, respectively.
  • the delay lines would be chosen so as to'be composed of a substantially greater number of capacitors and choke coils, then separate voltage pulses will not appear in succession at. the spark plug electrodes but rather a voltage pulse of extended duration.
  • main storage capacitor means operatively connected with said spark plug subject to control by said switch means; at least one independent auxiliary storage capacitor means connected in parallel with said main storage capacitor means; choke coil means connected between said main and auxiliary storage capacitor means for delaying discharge of said auxiliary storage capacitor means; and means for charging said main and auxiliary storage capacitor means to a predetermined potential, whereby each time said switch means establishes an operative circuit for said spark plug, said main storage capacitor means. first discharges through said operative circuit and thereafter said auxiliary storage capacitor means discharges independently and separately from said main storage capacitor means through said operative circuit at a time after thedis'charge of said main storage capacitor means determined by said choke coil means.
  • a capacitive ignition circuit arrangement for internal combustion engines including a plurality of spark plugs and switch means for periodically closing an operative circuit for the spark plugs, in combination, main storage capacitor means operatively connected with said spark plugs, subject to control by said switch means; atleast one independent auxiliary storage capacitor meanscon'nected in parallel with said main storage capacitor means; choke coil means connected between said main and auxiliary storage capacitor means for delaying dis; charge of said auxiliary storage capacitor means; and?
  • said main storage capacitor means for charging said main and auxiliary pacitor means to a predetermined potential, whereby each time said switch means establishesv an operative circuit for any one of said spark plugs, said main storage capacitor means first discharges through said operative circuit and thereafter said auxiliary storage means discharges independently and separately from said main storage capacitor means through said operative circuit at a time after the discharge of said main storage capacitor means determined by said choke coil means.
  • main storage capacitor means inductively coupled with saidspark plugs subject to control by said switch means; at; least one independent auxiliary storage capacitor means connected in parallel with said mainv storage capacitor means; choke coil means connected between said main means for delaying discharge of said auxiliary storage capacitor means; and means for charging said main and auxiliary storage capacitor means to a predetermined potential, whereby each time said switch means establishes an operative circuit for any one of said spark plugs, said main storage capacitor means first discharges through said operative circuit and thereafter said auxiliary storage capacitor means discharges independently and separately from said main storage capacitor means through said operative circuit at a time after the discharge of said main storage capacitor means determined by said choke coil means.
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means; a, plurality of independent auxiliary storage capacitor means.
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means; a, plurality of independent auxiliary storage capacitor means.
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means; a, plurality of independent auxiliary storage capacitor means.
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means; a, plurality of independent auxiliary storage capacitor means.
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means
  • main storage capacitor means operatively connected with said, spark plugs subject to control by said switch means
  • main storage capacitor means operatively connected with said, spark plugs
  • a lXi r storage ca-' iary storage capacitor means, and between adjacent ones of said auxiliary storage capacitor means, respectively for delaying discharge of each of said auxiliary storage capacitor means; and means for charging said main and auxiliary storage capacitor means to a predetermined potential, whereby each time said switch means establishes an operative circuit for any one of said spark plugs, said main storage capacitor means first discharges through said operative circuit and thereafter each of said auxiliary storage capacitor means discharges independently and separately from said main storage capacitor means and from the others of said auxiliary storage capacitor means through said operative circuit at a time after the discharge of said main storage capacitor means determined by the corresponding choke coil means, said auxiliary storage capacitor means discharging one after the other in succession.
  • main storage capacitor means inductively coupled with said spark plugs subject to control by said switch means; a plurality of independent auxiliary storage capacitor means connected in parallel with said main storage capacitor means; a plurality of choke coil means connected between s aid main storage capacitor means and one of said auxiliary storage capacitor means, and between adjacent ones of said auxiliary storage capacitor means, respectively for delaying discharge of each of said auxiliary storage capacitor means; and means for charging said main and auxiliary storage capacitor means to a predetermined potential, whereby each time said switch means establishes an operative circuit for any one of said spark plugs, said main storage capacitor means first discharges through said operative circuit therethrough and thereafter each of said auxiliary storage capacitor means discharges independently and separately from said main storage capacitor means and from the others of said auxiliary storage capacitor means through said operative circuit at a time after the discharge of said main storage capacitor means determined by the corresponding choke coil means,
US290451A 1962-07-04 1963-06-25 Ignition circuit for internal combustion engines which prevents ignition skipping Expired - Lifetime US3234430A (en)

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Application Number Priority Date Filing Date Title
DEB0067908 1962-07-04

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US (1) US3234430A (de)
AT (1) AT243025B (de)
CH (1) CH402512A (de)
DE (1) DE1414588B2 (de)
NL (1) NL144711B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658044A (en) * 1970-12-08 1972-04-25 Alden L Safstrom Capacitor discharge ignition system
US3665908A (en) * 1969-04-11 1972-05-30 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3677253A (en) * 1970-01-13 1972-07-18 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3788293A (en) * 1972-11-10 1974-01-29 Mcculloch Corp Low impedance capacitor discharge system and method
US3855984A (en) * 1969-10-15 1974-12-24 C Jacobs Capacitive discharge ignition system having variable capacitance
US3982518A (en) * 1971-10-14 1976-09-28 Fournitures Internationales De Materieles Electroniques Electronic ignition device for internal combustion engines
WO1992008891A1 (en) * 1990-11-15 1992-05-29 Orbital Engine Company (Australia) Pty. Limited Capacitative discharge ignition system for internal combustion engines
US5156136A (en) * 1990-06-19 1992-10-20 Murata Manufacturing Co., Ltd. Ignition coil
US6009864A (en) * 1992-12-24 2000-01-04 Orbital Engine Co. ( Australia) Pty. Limited Capacitive ignition system for internal combustion engines

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2606890C2 (de) * 1976-02-20 1985-11-07 Robert Bosch Gmbh, 7000 Stuttgart Hochleistungszündanlage für Brennkraftmaschinen
WO2005054665A1 (fr) * 2003-12-03 2005-06-16 Irina Alexandrovna Anisimova Systeme d'allumage pour moteur a combustion interne
RU2287080C1 (ru) * 2005-05-05 2006-11-10 Михаил Пантелеймонович Брижинёв Система зажигания двс

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2347286A (en) * 1942-06-19 1944-04-25 United Air Lines Inc Ignition system
US2427247A (en) * 1943-02-08 1947-09-09 Gen Electric Ignition system
US2571788A (en) * 1949-06-09 1951-10-16 Bendix Aviat Corp Electrical apparatus
US2716720A (en) * 1951-05-22 1955-08-30 Gen Lab Associates Inc Engine ignition apparatus and procedure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2347286A (en) * 1942-06-19 1944-04-25 United Air Lines Inc Ignition system
US2427247A (en) * 1943-02-08 1947-09-09 Gen Electric Ignition system
US2571788A (en) * 1949-06-09 1951-10-16 Bendix Aviat Corp Electrical apparatus
US2716720A (en) * 1951-05-22 1955-08-30 Gen Lab Associates Inc Engine ignition apparatus and procedure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665908A (en) * 1969-04-11 1972-05-30 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3855984A (en) * 1969-10-15 1974-12-24 C Jacobs Capacitive discharge ignition system having variable capacitance
US3677253A (en) * 1970-01-13 1972-07-18 Nippon Denso Co Capacitor discharge type ignition system for internal combustion engines
US3658044A (en) * 1970-12-08 1972-04-25 Alden L Safstrom Capacitor discharge ignition system
US3982518A (en) * 1971-10-14 1976-09-28 Fournitures Internationales De Materieles Electroniques Electronic ignition device for internal combustion engines
US3788293A (en) * 1972-11-10 1974-01-29 Mcculloch Corp Low impedance capacitor discharge system and method
US5156136A (en) * 1990-06-19 1992-10-20 Murata Manufacturing Co., Ltd. Ignition coil
WO1992008891A1 (en) * 1990-11-15 1992-05-29 Orbital Engine Company (Australia) Pty. Limited Capacitative discharge ignition system for internal combustion engines
US5531206A (en) * 1990-11-15 1996-07-02 Kitson; Mark R. Capacitative discharge ignition system for internal combustion engines
US6009864A (en) * 1992-12-24 2000-01-04 Orbital Engine Co. ( Australia) Pty. Limited Capacitive ignition system for internal combustion engines

Also Published As

Publication number Publication date
DE1414588B2 (de) 1971-07-22
NL144711B (nl) 1975-01-15
DE1414588A1 (de) 1968-10-10
CH402512A (de) 1965-11-15
AT243025B (de) 1965-10-25

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