US3553529A - Condenser discharge type ignition system with a magneto power supply - Google Patents

Condenser discharge type ignition system with a magneto power supply Download PDF

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Publication number
US3553529A
US3553529A US725615A US3553529DA US3553529A US 3553529 A US3553529 A US 3553529A US 725615 A US725615 A US 725615A US 3553529D A US3553529D A US 3553529DA US 3553529 A US3553529 A US 3553529A
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United States
Prior art keywords
ignition
winding
capacitor
charging
internal combustion
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Expired - Lifetime
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US725615A
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English (en)
Inventor
Gert Strelow
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit

Definitions

  • ABSTRACT An ignition arrangement for firing spark plugs in Germany internal combustion engine without the aid of a battery or "$392,424 electrical power supply.
  • the energy required for firing the [54] CONDENSER DISCHARGE TYPE IGNITION SYSTEM WITH A MAGNETO POWER SUPPLY spark plugs is derived from the rotating crank shaft on the engine to which a permanent magnetic member is coupled.
  • the magnetic member moves within the path of a ferromagnetic core upon which a charging winding and an auxiliary winding 10 claims 1 Drawing are wound.
  • CI 315/218 varies the magnetic flux through the core and thereby induces 315/168, 315/171, 315/206, 315/223, 123/148 voltages in the two windings wound upon the core.
  • the 1 References Cited discharge of the capacitor is controlled by the semiconductor UNITED STATES PATENTS control rectifier, by the voltage applied to its control elec- 3,240,198 3/1966 Loudon etal 123/148
  • the spark P to be fired is connected across the 3,311,783 3/1967 Gibbs et al 315/226 Secondary winding of the ignition transformer. and the firing 3 358 665 12,1967 Carmichael et aL 23/148 electrical impulse is induced in the secondary winding upon 3:367:314 H1968 Hirosawa et aL l23/148 the discharge of the capacitor through the primary winding.
  • the ignition energy is stored in an ignition capacitor which is charged through a charging coil acted upon by a magnetic system driven relative to the internal combustion engine.
  • the ignition capacitor is discharged through an electronic switch and circuit path containing no switching contacts.
  • the energy is discharged through the primary winding of an ignition transformer. The latter concludes a secondary winding which is connected to at least one spark plug.
  • the ignition arrangement in accordance with the present invention is particularly applicable where no battery is available to supply power.
  • a high voltage impulse having a steep front edge is attained at the instant of ignition within the secondary winding of the ignition transformer.
  • spark plugs with severely soiled spark electrodes are fired with a spark across them, with much assurance.
  • the application of mechanical switches for the purpose of controlling the ignition process can thus be avoided.
  • Such mechanical switches introduce unreliability in the operation ofthe ignition arrangement because they are easily damaged through sparking and oil deposits.
  • auxiliary winding upon the charging coil which contains also the charging winding for providing the charging voltage of the ignition capacitor.
  • the auxiliary winding provides a control voltage'for application to the control electrode of the electronic switch. This control voltage from the auxiliary winding is of opposite phase in relation to the voltage derived from the charging winding on the charing coil.
  • SUMMARY OF THE INVENTION electronic switch having a control electrode.
  • the output terminal of the auxiliary winding is connected to the control electrode of the electronic switch.
  • the ignition energy is stored in an ignition capacitor 1.
  • the capacitor is connected to a charging rectifier 2 which, in turn, is connected to the charging winding 3 of a charging coil 4.
  • the charging coil 4 has a ferromagnetic core 5 which terminates, at its ends,'in the pole pieces 6 and 7.
  • the pole pieces 6 and 7 surround a permanent magnet 8 mechanically coupled to the internal combustion engine (not shown) by means of a mechanical coupling represented by the dash-dot line 9.
  • the ignition capacitor 1 is also connected to a discharge circuit including the primary winding 10 of an ignition transformer 11, and an electronic control switch 12.
  • the latter may, for example, be in the form of a thyristor having a switched path A-K in series with the primary winding 10.
  • the secondary winding 13 of the ignition transformer 11 is applied across a spark plug 14.
  • the control circuit of the electronic switch 12 leads from its control electrode 6 to its cathode functioning electrode K and to an auxiliary winding 15 on the charging coil 4.
  • the auxiliary winding 15 provides a control voltage which is opposite in phase or sign to the voltage of the charging winding 3.
  • the charging winding 3 and auxiliary winding 15 have a common junction P leading to the cathode functioning electrode K of the electronic switch 12. Extending from the junction P, both windings 3 and 15 are wound oppositely upon the ferromagnetic core 5.
  • Fail safe control and operation is achieved by providing the diode 16 in the circuit path between the winding 15 and the control electrode G of the electronic switch 12.
  • the diode 16 is connected so that its cathode is joined to the control electrode G.
  • a resistor 17 and capacitor 18 are connected across the electrodes G and K of the electronic switch 12.
  • the permanent magnet 8 rotates between the pole pieces 6 and 7 of the ferromagnetic core 5 associated with the charging coil 4.
  • an AC voltage is induced within the charging winding 3 as well as the auxiliary winding 15. If half a sine wave appears in the charging winding 3 so that the terminal of the winding connected to the rectifier 2 is positive with respect to the circuit point P, then this voltage signal is transmitted to the ignition capacitor 1 by way of the charging rectifier 2.
  • the ignition capacitor 1 becomes thereby charged and the energy necessary for the ignition process is stored.
  • a positive potential with 'be induced within the charging winding 3 which is negative at the terminal connected to the rectifier 2 with respect to the junction point P.
  • This induced voltage remains ineffective since its polarity is such that the rectifier 2 is in the cutoff state.
  • the ignition capacitor 1 can, therefore, not have the induced voltage applied to it.
  • the half sine wave induced within the auxiliary winding 15, however, can now be applied to the control electrode G, by way of the diode 16. This is because the terminal of the winding connected to the diode 16 is now positivewith respect to junction point P.
  • the control electrode G of the electronic switch 12 becomes positive with respect to the cathode terminal K.
  • the circuit path A-K thereby is switched to the conducting state and the ignition capacitor 1 can discharge through the primary winding of the ignition transformer 11.
  • a high voltage impulse appears in the secondary winding 13 of the ignition transformer 11.
  • This high voltage ignition impulse causes a spark to jump across the electrodes of the spark plug 14.
  • the diode 16 leading to the control electrode G of the electronic switch 12 assures that only a positive potential is applied to the control electrode G. As a result the path sine waves induced within the auxiliary coil 15, and not used, do not effect the control path GK.
  • the capacitor 18 connected in parallel with the resistor 17 and across the terminal G and K of the electronic switch, serves the purpose of conducting any disturbing oscillations to the cathode so that these oscillations do not influence the control process in an undesired manner.
  • the present invention of the ignition arrangement has the particular advantage that the control voltage for the electronic switch has a shorter rise time with increase in the speed of the internal combustion engine. As a result automatic advancement of the ignition instant is achieved, which is particularly desirable from the power consumption viewpoint in internal combustion engines.
  • the secondary winding ofthe ignition transformer includes a single spark plug. It is, however, within the frame of the present invention for the secondary winding to include a plurality of spark plugs. in such an arrangement, the ignition impulse is applied to the plurality of spark plugs, in sequence through the aid of an ignition distributor.
  • the magnetic system can in this case be driven with the corresponding required speed through a transmission means, or can be designed so as to rotate accordingly.
  • the magnetic system is comprised of a permanent magnet rotating disc with symmetrical or unsymmetrical distribution of pole pieces, may also be applied. In such a design the magnetic rotating disc rotates about a mounting plate upon which the charging coil is stationarily mounted.
  • the magnetic system is maintained stationary and the charging coil is rotated in the corresponding manner.
  • -A semiconductor control rectifier is used as the electronic switch in the embodiment of the present invention. It is, however, quite possible to use also electronic tubes and other semiconductor elements for this purpose.
  • An ignition arrangement for an internal combustion engine comprising, in combination, spark plug means to be fired through an ignition impulse applied thereto; ignition capacitor means for storing the ignition energy for firing said spark plug means; charging coil means having a single core with charging winding wound thereon and connected to said ignition capacitor means for charging the same; magnetic means mechanically coupled to said engine and moved by said engine so that the magnetic field of said magnetic means links varyingly with said charging coil means and induces thereby a voltage within said charging winding; electronic switching means connected to said ignition capacitor means and having a control electrode for switching on said switching means into the conducting state to discharge said capacitor means, said discharge of said capacitor being inhibited when said electronic switching means is switched off into the nonconducting state by said control electrode; ignition transformer means having primary and secondary windings, said primary winding being connected to said capacitor means for receiving the electrical discharge therefrom and said secondary winding being connected to said spark plug means; and auxiliary winding means wound on said single core and providing an induced voltage opposite in phase to the voltage within said charging winding, said auxiliary winding being connected to
  • the ignition arrangement for an internal combustion engine as defined in claim 1 including connecting means for connecting one terminal of said charging winding to one terminal of said auxiliary winding to form an electrical junction con nected to said electronic switching means, said charging winding and said auxiliary winding being wound upon said single core in opposite sense.
  • the ignition arrangement for an internal combustion engine as defined in claim 2 including rectifier means connected between said charging winding and said ignition capacitor means.
  • the ignition arrangement for an internal combustion engine as defined in claim 3 including diode means connected between said auxiliary winding and said control electrode of said electronic switching means.
  • the ignition arrangement for an internal combustion engine as defined in claim 4 including input and output terminal means on said electronic switching means; and resistor means connected in parallel with said control electrode and one of said terminal means.
US725615A 1967-05-09 1968-05-01 Condenser discharge type ignition system with a magneto power supply Expired - Lifetime US3553529A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1967B0092424 DE1539181B2 (de) 1967-05-09 1967-05-09 Zuendeinrichtung fuer brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3553529A true US3553529A (en) 1971-01-05

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ID=6986388

Family Applications (1)

Application Number Title Priority Date Filing Date
US725615A Expired - Lifetime US3553529A (en) 1967-05-09 1968-05-01 Condenser discharge type ignition system with a magneto power supply

Country Status (8)

Country Link
US (1) US3553529A (fr)
AT (1) AT288786B (fr)
CH (1) CH462541A (fr)
DE (1) DE1539181B2 (fr)
ES (1) ES353706A1 (fr)
FR (1) FR1565158A (fr)
GB (1) GB1184293A (fr)
SE (1) SE329302B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704701A (en) * 1969-12-19 1972-12-05 Gunter Struber Ignition arrangements for internal combustion engines
US3866589A (en) * 1972-03-10 1975-02-18 Bosch Gmbh Robert Semiconductor controlled magneto ignition system for internal combustion engines
US3933139A (en) * 1971-01-22 1976-01-20 The Economy Engine Company Capacitive discharge ignition system
US3941111A (en) * 1973-09-10 1976-03-02 Syncro Corporation Ignition system
US3960128A (en) * 1974-10-15 1976-06-01 Mcculloch Corporation Capacitor discharge ignition system
US4173961A (en) * 1977-02-22 1979-11-13 Delta Systems, Inc. Inductive solid state magneto ignition system
USRE31837E (en) * 1975-04-29 1985-02-26 R. E. Phelon Company, Inc. Single core condenser discharge ignition system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1160556B (it) * 1978-07-28 1987-03-11 Fiat Spa Impianto di accensione a scarica capacitiva alimentato a corrente trifase per motori a combustione interna destinati ad impianti fissi
DE3152015C2 (de) * 1981-12-31 1983-11-24 Prüfrex-Elektro-Apparatebau Inh. Helga Müller, geb.Dutschke, 8501 Cadolzburg Elektronische Zündvorrichtung für Brennkraftmaschinen
DD254976A1 (de) * 1982-12-01 1988-03-16 Johannes Ulbricht Magnet-hochspannungs-kondensatorzuendanlage fuer brennkraftmaschinen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240198A (en) * 1962-01-12 1966-03-15 Bendix Corp Electrical apparatus
US3311783A (en) * 1964-04-07 1967-03-28 Bosch Arma Corp Ignition system with electronic distribution and control
US3358665A (en) * 1965-10-23 1967-12-19 Syncro Corp Ignition system
US3367314A (en) * 1964-09-16 1968-02-06 Honda Gijutsu Kenkyusho Kk Non-contact ignition device
US3398353A (en) * 1965-07-02 1968-08-20 Globe Union Inc Magneto systems
US3405347A (en) * 1965-09-30 1968-10-08 Eltra Corp Breakerless flywheel magneto ignition system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240198A (en) * 1962-01-12 1966-03-15 Bendix Corp Electrical apparatus
US3311783A (en) * 1964-04-07 1967-03-28 Bosch Arma Corp Ignition system with electronic distribution and control
US3367314A (en) * 1964-09-16 1968-02-06 Honda Gijutsu Kenkyusho Kk Non-contact ignition device
US3398353A (en) * 1965-07-02 1968-08-20 Globe Union Inc Magneto systems
US3405347A (en) * 1965-09-30 1968-10-08 Eltra Corp Breakerless flywheel magneto ignition system
US3358665A (en) * 1965-10-23 1967-12-19 Syncro Corp Ignition system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704701A (en) * 1969-12-19 1972-12-05 Gunter Struber Ignition arrangements for internal combustion engines
US3933139A (en) * 1971-01-22 1976-01-20 The Economy Engine Company Capacitive discharge ignition system
US3866589A (en) * 1972-03-10 1975-02-18 Bosch Gmbh Robert Semiconductor controlled magneto ignition system for internal combustion engines
US3941111A (en) * 1973-09-10 1976-03-02 Syncro Corporation Ignition system
US3960128A (en) * 1974-10-15 1976-06-01 Mcculloch Corporation Capacitor discharge ignition system
USRE31837E (en) * 1975-04-29 1985-02-26 R. E. Phelon Company, Inc. Single core condenser discharge ignition system
US4173961A (en) * 1977-02-22 1979-11-13 Delta Systems, Inc. Inductive solid state magneto ignition system

Also Published As

Publication number Publication date
CH462541A (de) 1968-09-15
ES353706A1 (es) 1969-10-16
FR1565158A (fr) 1969-04-25
DE1539181A1 (de) 1970-02-19
AT288786B (de) 1971-03-25
DE1539181B2 (de) 1976-07-29
GB1184293A (en) 1970-03-11
SE329302B (fr) 1970-10-05

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