US3683881A - Battery powered ignition circuit for internal combustion engines - Google Patents

Battery powered ignition circuit for internal combustion engines Download PDF

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Publication number
US3683881A
US3683881A US65187A US3683881DA US3683881A US 3683881 A US3683881 A US 3683881A US 65187 A US65187 A US 65187A US 3683881D A US3683881D A US 3683881DA US 3683881 A US3683881 A US 3683881A
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United States
Prior art keywords
breaker
primary winding
internal combustion
battery
inductance
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Expired - Lifetime
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US65187A
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English (en)
Inventor
Mitukuni Tutui
Hiroshi Watanabe
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Hitachi Ltd
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Hitachi Ltd
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Publication date
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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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/10—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having continuous electric sparks

Definitions

  • This invention relates to an improvement in battery powered ignition circuits for internal combustion engines.
  • a battery powered ignition circuit for internal combustion engines comprises a battery as a source of electrical energy to the ignition circuit, an inductance coil for transforming the energy to a high voltage, breaker points or contacts which interrupt the primary circuit of the induction coil to permit transformation of the voltage and operate as a timer for correlating the generation of the spark with the rotation cycle of the engine, a distributor for applying the high voltage discharge in succession to the cylinders in the proper sequence and a spark plug in each cylinder to provide a fixed insulated gap across which the igniting spark is generated.
  • the additional inductance is effectively inductively isolated from the ignition coil.
  • the induced voltage of the additional inductance at the instant of ignition of the spark plug is superimposed on the induced primary winding voltage to increase the applied voltage between the electrodes of the breaker.
  • Secondary arcing or restriking between the electrodes of the breaker is caused by the increased applied voltage generated by the large inductance in series with the contacts, which serves to remove the surface material on the contact surface dispersed from the opposite electrode by the first arcing during the initial separation of the contacts, to thereby prevent the growth of the projection.
  • a part of the surface material of one contact tends to move towards the opposite contact by a dispensing and transferring action, and a projection is thereby formed on one surface of one contact, usually the stationary contact.
  • the projection grows during the operation, causes variation of the ignition timing and the closing duration of the points, which has a great effect upon the performance of the engine, and reduces the durability of the points, especially for high engine speeds.
  • FIG. 1 is a circuit diagram of the present invention.
  • FIG. 2 is a graphical'illustration showing the relafionship between the secondary voltage and the rotational speed of engine obtained by experiment.
  • FIG. 3 is a graphical illustration showing the relationship between the height of the projection on the contact surface, which grows during the operation of the circuit, and the running distance of the engine for comparing both the ignition circuit of the present invention and the conventional ignition circuit.
  • a projection on the cathode surface is: formed and grows gradually during the repetition of the interrupting operation.
  • restriking occurs at the instant of igniting of the spark plug, when a surge voltage occurs in the secondary circuit of the ignition coil and induces a very high voltage in the primary winding of the induction coil and the outer inductance in the primary circuit, the displaced material will be dissipated.
  • the ignition circuit is provided with a battery 10, whose output voltage in this embodiment is 12 V, in series with an ignition switch 12, which is closed during the operation of the ignition circuit.
  • An induction coil 14 is provided which comprises primary winding 142, secondary winding 144 and laminated iron core 146, the turns ratio (a) between the primary winding and secondary winding being 100 in this embodiment and the inductance value of the primary winding (L being mH.
  • a breaker 16 which comprises a stationary contact and a movable contact for interrupting the primary circuit current in the range from 2 to 5 A is connected between one side of battery 1 and the induction coil 14.
  • a condenser 18 which absorbs the surge, reduces the arcing and reverses the direction of current flow in the primary circuit, thus aiding the rapidity of collapse of the magnetic field in and around the core 146, is connected across the points 16.
  • the condenser 18 correspondingly increases the voltage induced in the secondary winding 144.
  • a resistance unit 20 is provided in series with battery 1 to adjust the primary circuit current and a distributor 22 for connecting the high voltage discharge to the successive cylinders in the proper sequence is connected in the conventional manner between the secondary of the induction coil 14 and spark plugs 24, 26, 28 and 30, which are positioned in respective engine cylinders.
  • An additional inductance unit 32 is connected in series with the primary winding 142 of the coil 14 so that the mutual inductance with the induction coil 14 is substantially zero.
  • the induced voltage at the instant of igniting of each of the spark plugs 24, 26, 28 and 30 is applied between the electrodes of the breaker 16 on which is superimposed the induced voltage of the primary winding 142 of the induction coil 14, thereby causing a secondary arcing or restriking between the electrodes of the breaker 16 to displace the surface material on the cathode towards the anode and prevent the formation of the projection on that contact.
  • a short-circuiting switch 34 is connected in parallel with the additional inductance unit 32 and is operated during the starting period of the engine.
  • the applied voltage between the electrodes of the breaker 16 at the instant of ignition of the spark plug when operating in the range of primary circuit current from 2 to 5 A, should be determined between 190 and 250 V, particularly around 200 V, to cause a restriking having an appropriate arcing energy. lf a higher induced voltage is applied between the electrodes, too much dispersion of the surface material occurs to reduce the durability of the breaker l6.
  • Chart A provides experimental results showing the difference between the applied voltage at the instant of ignition of the spark plug between electrodes of the breakers of three ignition circuits having different circuit conditions, one of which is one embodiment of the present invention.
  • both the primary circuit current which is to be interrupted by the breaker and the secondary induced voltage are set at 3.5 A and 8.0 KV, respectively.
  • ignition circuit No. 1 which is one conventional ignition circuit
  • the inductance value of the primary winding of the induction coil (L is 5 mH and the turns ratio (a) is 100 with no external or additional inductance unit being added.
  • the inductance value of the primary winding (L and the turns ratio (a) are the same as those of circuit No. 1, however, the external or additional inductance unit 32 having an inductance value of l mH is added as shown in FIG. 1.
  • the inductance value of the primary winding (L is 10 mH and the turns ratio (a) is 100 with no external or additional inductance being added.
  • FIG. 2 is a graph of experimental results showing the relationship between the secondary voltage and the rotational speed of engine, for the above-described experimental ignition circuits No. 1, No. 2 and No. 3, each equipped on a four cylinder internal combustion engine.
  • the abscissa in this figure represents secondary voltage and the ordinate represents rotational engine speed.
  • the curve 50 shows the results from the ignition circuit No. 1
  • curve 60 shows the results from the ignition circuit No. 2
  • curve 70 shows the results from the ignition circuit No. 3. It can be seen from FIG.
  • FIG. 3 is a graph of the experimental results showing the relationship between the height of the projection growing on one surface of either contact of the breaker during the operation of the engine and the running distance of the automobiles equipped with the ignition circuits No. 1 and No. 2, respectively.
  • the abscissa represents the height of the projection and the ordinate represents the running distance of the automobiles.
  • the curve 61 provides the minimum projection height of the breaker contact of the ignition circuit No. 2 over a corresponding running distance, and curve 62 provides the maximum projection height of circuit No.
  • curve 51 represents the minimum projection height of circuit No. l
  • curve 52 represents the maximum projection height of circuit No. 1. It would be understood that the projection height of the breaker contact of the automobile equipped with ignition circuit No. 2 is extremely reduced compared to that of circuit No. 1. Accordingly, the durability of the contacts or points of the breaker of ignition circuit No. 2 is dramatically increased.
  • a battery powered ignition circuit for plural cylinder internal combustion engines comprising:
  • a battery for supplying electrical energy to said ignition circuit
  • an induction coil for transforming said electrical energy to a high voltage; said induction coil having a primary winding inductively coupled to a secondary winding, said primary winding being connected in series with said battery, said secondary winding being selectively connectable through a distributor to a spark plug in each cylinder of said internal combustion engine;
  • a breaker connected in series with said battery and said induction coil and having contacts for interrupting the series connection of said primary winding to said battery; a condenser connected in parallel with said breaker to absorb voltage surges generated by said breaker when interrupting the connection of said primary winding to said battery;
  • m ri s for effecting a secondary arcing of the breaker contacts comprising only an additional inductance connected in series with said primary winding between said battery and said primary winding, the mutual inductance between said additional inductance, saidprimary winding and said secondary winding being substantially zero.
  • a battery powered ignition circuit for internal combustion engines wherein the inductance value of said additional inductance is determined so that the induced voltage of said additional inductance at the instant of ignition of each of said spark plugs is superimposed on the induced voltage of said primary winding to restrike the are between the contacts of said breaker.
  • a battery powered ignition circuit for internal combustion engines wherein the inductance value of said additional inductance is such that the sum of the induced voltage of said additional inductance and said primary winding at the instant of ignition of each of said spark plugs applied between the contacts of said breaker is between 200 to 250 V, when the interrupting current of said breaker is in the range from 2 to 5 A.
  • a battery powered ignition circuit for internal combustion engines according to claim 1, wherein short circuiting means is connected to said additional inductance for short-circuiting said additional inductance during the starting period of said internal combustion engine.
  • a battery powered ignition circuit for internal combustion engines including an autotransformer having a primary winding in series with a battery and a pair of. breaker contacts, means for effecting a secondary arcing of the breaker contacts including only an additional inductance connected in series with said primary winding between said battery and :said primary winding for increasing theinductance in series with said breaker contacts, said additional inductance being inductively isolated from said autotransforrner so as to preserve the turns ratio thereof.
  • a battery powered ignition circuit for internal combustion engines wherein the inductance value of said additional inductance is such that the sum of the induced voltage of said additional inductance and said primary winding at the instant of ignition of each of said spark plugs applied between the contacts of said breaker is between 200 to 250 V, when the interrupting current of said breaker is in the range from 2 to 5 A.
  • a battery powered ignition circuit for internal combustion engines wherein short circuiting means is connected to said additional inductance for short-circuiting said additional in ductance during the starting period of said internal combustion engine.

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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)
US65187A 1969-08-22 1970-08-19 Battery powered ignition circuit for internal combustion engines Expired - Lifetime US3683881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44066023A JPS4824564B1 (ja) 1969-08-22 1969-08-22

Publications (1)

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US3683881A true US3683881A (en) 1972-08-15

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US65187A Expired - Lifetime US3683881A (en) 1969-08-22 1970-08-19 Battery powered ignition circuit for internal combustion engines

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US (1) US3683881A (ja)
JP (1) JPS4824564B1 (ja)
DE (1) DE2041695A1 (ja)
GB (1) GB1304083A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147147A (en) * 1976-11-29 1979-04-03 Ortiz Francisco E Internal combustion engine ignition system
US5009213A (en) * 1989-02-13 1991-04-23 Fiat Auto S.P.A. Static ignition device for internal combustion engines
CN112696302A (zh) * 2019-10-22 2021-04-23 伊利诺斯工具制品有限公司 用于基于发动机转速阻止起动器启动的系统和方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2338556C2 (de) * 1973-07-30 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart Zündanlage für Brennkraftmaschinen
DE3546126A1 (de) * 1985-12-24 1987-07-02 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen
JP6147403B1 (ja) * 2016-09-29 2017-06-14 ワールド・リンク株式会社 港湾、水路などの水中に溶出した重金属類の浄化材及び浄化システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1440528A (en) * 1918-03-16 1923-01-02 Alvin E Buchenberg Starting and ignition system for internal-combustion engines
US1693210A (en) * 1926-07-16 1928-11-27 Lepel Egbert Von Means for increasing the performance of ignition systems by a booster device for ignition apparatus
US1929651A (en) * 1933-10-10 Generator ignition control
US3025430A (en) * 1959-04-08 1962-03-13 Axel R Leppala Ignition circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1929651A (en) * 1933-10-10 Generator ignition control
US1440528A (en) * 1918-03-16 1923-01-02 Alvin E Buchenberg Starting and ignition system for internal-combustion engines
US1693210A (en) * 1926-07-16 1928-11-27 Lepel Egbert Von Means for increasing the performance of ignition systems by a booster device for ignition apparatus
US3025430A (en) * 1959-04-08 1962-03-13 Axel R Leppala Ignition circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147147A (en) * 1976-11-29 1979-04-03 Ortiz Francisco E Internal combustion engine ignition system
US5009213A (en) * 1989-02-13 1991-04-23 Fiat Auto S.P.A. Static ignition device for internal combustion engines
CN112696302A (zh) * 2019-10-22 2021-04-23 伊利诺斯工具制品有限公司 用于基于发动机转速阻止起动器启动的系统和方法

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Publication number Publication date
DE2041695A1 (de) 1971-03-11
JPS4824564B1 (ja) 1973-07-23
GB1304083A (ja) 1973-01-24

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