GB1097201A - Electrical pulse generator - Google Patents

Electrical pulse generator

Info

Publication number
GB1097201A
GB1097201A GB1227064A GB1227064A GB1097201A GB 1097201 A GB1097201 A GB 1097201A GB 1227064 A GB1227064 A GB 1227064A GB 1227064 A GB1227064 A GB 1227064A GB 1097201 A GB1097201 A GB 1097201A
Authority
GB
United Kingdom
Prior art keywords
transformer
time
pulse
capacitor
ignition
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
Application number
GB1227064A
Inventor
Richard Anthony Fitch
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1227064A priority Critical patent/GB1097201A/en
Priority to FR10427A priority patent/FR1429616A/en
Publication of GB1097201A publication Critical patent/GB1097201A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F02P7/03—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
    • H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device

Abstract

1,097,201. Semi-conductor pulse circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 23, 1965 [March 24, 1964; Dec. 15, 1964], Nos. 12270/64 and 51114/64. Heading H3T. [Also in Divisions F1 and H2] In a pulse generator, particularly for ignition systems of internal combustion or jet engines or for the ignition of gas or oil burners, a step-up transformer (TX1) is energized for constant periods of time by a switching device (T3) and arranged so that an opening of the switching device, a capacitor (C2) becomes charged and is later discharged by a triggered discharge device (T4) so as to generate a pulse. Fig. 1 shows an ignition circuit for an I.C. engine in which transistor T1 is normally conductive and transistors T2, T3, T5 normally non-conductive. Each time the conventional cam-shaft-driven contact S 1 is opened, T5 is turned on, turning off T1 which forms with T2 a monostable circuit. Transistors T2, T3 are thus turned on for a time determined by the values of capacitor C1 and resistor R1. The primary inductance of transformer TX1 is thus charged during this period. At the end of the time period, T3 is turned off so that the energy in transformer TX1 charges capacitor C2 via diode D1. Thyristor T4 is triggered next time contacts S1 open, discharging C2 via TX2, thus generating a spark of oscillatory nature in a spark plug (not shown) connected to capacitor C5. Transformer TX2 may have a non-linear ferro-magnetic core. The operation is improved by the temperatureresistance characteristics of lamp L1 which may be the ignition indicator lamp. Generating constant-energy pulses.-A Zener diode Z prolongs the unstable period of the monostable circuit when the supply voltage is low so as to allow more time for the primary current to transformer TX1 to build up and thus stabilize the energy in each pulse. Switch S2 may be closed at low triggering frequency to convert the circuit T1 . . . T3 into a free running oscillator. Pulse generators with multiple discharging circuits.-In Fig. 4 (not shown) a common circuit T1 . . . T3, TX1, C2 may be triggered by individual contacts S1 (one for each cylinder); C2 being successively discharged by individual circuits comprising transformer TX2 and thyristor T4 mounted adjacent each spark plug. The contacts S1 may be replaced by a dynamoelectric device having multiple pick-up coils or by a plurality of photo-transistors energized from a single beam of light extending radially from a rotating shaft.
GB1227064A 1964-03-24 1964-03-24 Electrical pulse generator Expired GB1097201A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1227064A GB1097201A (en) 1964-03-24 1964-03-24 Electrical pulse generator
FR10427A FR1429616A (en) 1964-03-24 1965-03-23 Electric pulse generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1227064A GB1097201A (en) 1964-03-24 1964-03-24 Electrical pulse generator

Publications (1)

Publication Number Publication Date
GB1097201A true GB1097201A (en) 1967-12-29

Family

ID=10001480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227064A Expired GB1097201A (en) 1964-03-24 1964-03-24 Electrical pulse generator

Country Status (1)

Country Link
GB (1) GB1097201A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442017A1 (en) * 1984-11-16 1986-05-28 Vogler, Johannes, Dipl.-Ing. (FH) Dipl.rer.pol., 8500 Nürnberg Ignition spark generator for spark ignition engines
DE3546126A1 (en) * 1985-12-24 1987-07-02 Bosch Gmbh Robert IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442017A1 (en) * 1984-11-16 1986-05-28 Vogler, Johannes, Dipl.-Ing. (FH) Dipl.rer.pol., 8500 Nürnberg Ignition spark generator for spark ignition engines
DE3546126A1 (en) * 1985-12-24 1987-07-02 Bosch Gmbh Robert IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

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