US2717337A - Electric spark ignition apparatus - Google Patents

Electric spark ignition apparatus Download PDF

Info

Publication number
US2717337A
US2717337A US281116A US28111652A US2717337A US 2717337 A US2717337 A US 2717337A US 281116 A US281116 A US 281116A US 28111652 A US28111652 A US 28111652A US 2717337 A US2717337 A US 2717337A
Authority
US
United States
Prior art keywords
condenser
inductance
gap
electric spark
control
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
US281116A
Inventor
Laird John Andrew
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US2717337A publication Critical patent/US2717337A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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

  • This invention relates to electric spark ignition apparatus for igniting combustible gas mixtures in prime movers, the apparatus being of the kind comprising a condenser, and a control gap and inductance in series with the condenser, the latter receiving its charge from any convenient source, and the discharge being effected across an igniting plug.
  • the object of the invention is to minimise risk of failure of a spark occurring at the igniting plug.
  • the invention comprises an apparatus of the kind aforesaid having combined with it an additional condenser arranged in parallel with the control gap and at least a part of the inductance.
  • the additional condenser is connected in series with an inductance which is coupled to the inductance associated with the control gap.
  • Figures 1, 2 and 3 are diagrams respectively illustrating three embodiments of the invention.
  • the already known part of a system embodying the invention comprises a condenser a of the desired capacity.
  • This condenser is intended to be charged intermittently from a magneto, ignition coil or any other convenient source. It is not essential to the invention. that the condenser a shall be a separately formed component, as the self-capacity of the source or the distributedcapacity of the cables or associated parts of the system may be sufficient for the purpose in view and we desire it to be understood that the term condenser as used herein shall include any sufficient capacity which is in herently associated with the system.
  • a control gap b In series with the condenser is arranged a control gap b and also an inductance 0 adapted to prolong the discharge from the condenser, the control gap being adapts i to break down when the condenser voltage reaches an amount determined by the gap.
  • an additional condenser e there is arranged in parallel with the control gap and inductance, an additional condenser e as shown in Figure l.
  • the capacity of the additional condenser may have a widely variable value, the optimum value for a given system being readily ascertainable by experiment.
  • a high resistance 1 may be provided in the position shown, or across the igniting gap, where the normal leakage across Patented Sept. 6, 1955 the insulation of the igniting gap is insufficient to serve the same purpose.
  • step-up transformer effect Whilst the desired result may be ensured by arranging the additional condenser in the manner above described, it is preferred to introduce a step-up transformer effect. This may be obtained by connecting one side of the additional condenser e to any convenient point of the inductance 0, so as to obtain an autotransformer effect as shown in Figure 2. Or alternatively an additional inductance g coupled to the said inductance c may be connected in series with the additional condenser e to obtain the desired step-up transformer etfect as shown in Figure 3.
  • the inductance may be arranged as shown, or it may be placed between the condenser a and the control gap.
  • Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including capacity, a control gap in said circuit adapted to control the discharge and an inductance in series with said capacity, and a condenser connected in parallel with the said control gap and at least a part of the inductance.
  • Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including a condenser, a control gap in said circuit adapted to control the discharge and an inductance in series with said condenser, and a second condenser connected in parallel with the said control gap and at least a part of the inductance.
  • Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including capacity, a control gap in said circuit adapted to control the disharge, an inductance associated with said control gap, a second inductance coupled to said first inductance,
  • Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including a condenser, a control gap adapted to control the discharge, an inductance associated with said control gap, a second inductance coupled to said first inductance, and a second condenser arranged in parallel with the control gap, one side of said condenser being connected in series with the said second inductance.
  • Electric spark ignition apparatus for the purpose specified, comprising a discharge circuit including capacity, a control gap in said circuit to control the discharge, an inductance in series with said capacity, and a condenser connected in parallel with said control gap.
  • Electric spark ignition apparatus for the purpose specified, comprising a discharge circuit including a condenser, a control gap in said circuit to control the discharge, an inductance in series with said condenser, and a second condenser connected in parallel with said con trol gap.

Landscapes

  • 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)

Description

Sept. 6, 1955 J. A. LAIRD 2,717,337
ELECTRIC SPARK IGNITION APPARATUS Filed April 8, 1952 United States Patent ELECTRIC SPARK IGNITION APPARATUS John Andrew Laird, Coventry, England, assignor to lJosflph Lucas (Industries) Limited, Birmingham, Eng- Application April 8, 1952, Serial No. 281,116
Claims priority, application Great Britain April 9, 1951 6 Claims. (Cl. 315-243) This invention relates to electric spark ignition apparatus for igniting combustible gas mixtures in prime movers, the apparatus being of the kind comprising a condenser, and a control gap and inductance in series with the condenser, the latter receiving its charge from any convenient source, and the discharge being effected across an igniting plug.
The object of the invention is to minimise risk of failure of a spark occurring at the igniting plug.
The invention comprises an apparatus of the kind aforesaid having combined with it an additional condenser arranged in parallel with the control gap and at least a part of the inductance.
Alternatively the additional condenser is connected in series with an inductance which is coupled to the inductance associated with the control gap.
In the accompanying drawings:
Figures 1, 2 and 3 are diagrams respectively illustrating three embodiments of the invention.
The already known part of a system embodying the invention, comprises a condenser a of the desired capacity. This condenser is intended to be charged intermittently from a magneto, ignition coil or any other convenient source. It is not essential to the invention. that the condenser a shall be a separately formed component, as the self-capacity of the source or the distributedcapacity of the cables or associated parts of the system may be sufficient for the purpose in view and we desire it to be understood that the term condenser as used herein shall include any sufficient capacity which is in herently associated with the system.
In series with the condenser is arranged a control gap b and also an inductance 0 adapted to prolong the discharge from the condenser, the control gap being adapts i to break down when the condenser voltage reaches an amount determined by the gap. With discharge of the condenser across the control gap, a simultaneous discharge normally occurs across the ignition gap d. In some conditions, however, the discharge across the i nition gap may fail, and the risk of this possibility is obviated or minimised in the following manner.
According to the present invention, there is arranged in parallel with the control gap and inductance, an additional condenser e as shown in Figure l. The capacity of the additional condenser may have a widely variable value, the optimum value for a given system being readily ascertainable by experiment. Also, if desired a high resistance 1 may be provided in the position shown, or across the igniting gap, where the normal leakage across Patented Sept. 6, 1955 the insulation of the igniting gap is insufficient to serve the same purpose.
Whilst the desired result may be ensured by arranging the additional condenser in the manner above described, it is preferred to introduce a step-up transformer effect. This may be obtained by connecting one side of the additional condenser e to any convenient point of the inductance 0, so as to obtain an autotransformer effect as shown in Figure 2. Or alternatively an additional inductance g coupled to the said inductance c may be connected in series with the additional condenser e to obtain the desired step-up transformer etfect as shown in Figure 3.
In any of the above described means, the inductance may be arranged as shown, or it may be placed between the condenser a and the control gap.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
1. Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including capacity, a control gap in said circuit adapted to control the discharge and an inductance in series with said capacity, and a condenser connected in parallel with the said control gap and at least a part of the inductance.
2. Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including a condenser, a control gap in said circuit adapted to control the discharge and an inductance in series with said condenser, and a second condenser connected in parallel with the said control gap and at least a part of the inductance.
3. Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including capacity, a control gap in said circuit adapted to control the disharge, an inductance associated with said control gap, a second inductance coupled to said first inductance,
and a condenser arranged in parallel with the control gap, one side of said condenser being connected in series with the said second inductance.
4. Electric spark gap ignition apparatus for the purpose specified comprising a discharge circuit including a condenser, a control gap adapted to control the discharge, an inductance associated with said control gap, a second inductance coupled to said first inductance, and a second condenser arranged in parallel with the control gap, one side of said condenser being connected in series with the said second inductance.
5. Electric spark ignition apparatus for the purpose specified, comprising a discharge circuit including capacity, a control gap in said circuit to control the discharge, an inductance in series with said capacity, and a condenser connected in parallel with said control gap.
6. Electric spark ignition apparatus for the purpose specified, comprising a discharge circuit including a condenser, a control gap in said circuit to control the discharge, an inductance in series with said condenser, and a second condenser connected in parallel with said con trol gap.
References Cited in the file of this patent UNSTED STATES PATENTS 2,433,462 Laird Dec. 30, 1947
US281116A 1951-04-09 1952-04-08 Electric spark ignition apparatus Expired - Lifetime US2717337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2717337X 1951-04-09

Publications (1)

Publication Number Publication Date
US2717337A true US2717337A (en) 1955-09-06

Family

ID=10914009

Family Applications (1)

Application Number Title Priority Date Filing Date
US281116A Expired - Lifetime US2717337A (en) 1951-04-09 1952-04-08 Electric spark ignition apparatus

Country Status (1)

Country Link
US (1) US2717337A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950419A (en) * 1956-12-07 1960-08-23 Bendix Corp Ignition apparatus
US3037147A (en) * 1959-11-13 1962-05-29 Gen Electric Starting and operating circuit for a discharge device
US3219880A (en) * 1963-06-27 1965-11-23 Spectrolab Automatic starter for the ignition of gas arc lamps
US4714862A (en) * 1984-10-17 1987-12-22 U.S. Philips Corporation Circuit arrangement for igniting and operating gas discharge lamps

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433462A (en) * 1947-12-30 Electric spark ignition system for

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433462A (en) * 1947-12-30 Electric spark ignition system for

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950419A (en) * 1956-12-07 1960-08-23 Bendix Corp Ignition apparatus
US3037147A (en) * 1959-11-13 1962-05-29 Gen Electric Starting and operating circuit for a discharge device
US3219880A (en) * 1963-06-27 1965-11-23 Spectrolab Automatic starter for the ignition of gas arc lamps
US4714862A (en) * 1984-10-17 1987-12-22 U.S. Philips Corporation Circuit arrangement for igniting and operating gas discharge lamps

Similar Documents

Publication Publication Date Title
US1791606A (en) Setting electric projectile fuses
US2589164A (en) Ignition system
US2651005A (en) Electrical apparatus
US4027198A (en) Capacitor discharge ignition system
US2864974A (en) Ignition system for internal combustion engines
US2717337A (en) Electric spark ignition apparatus
US3408536A (en) Breakerless oscillator ignition system
GB1263248A (en) Ignition systems
US2470413A (en) Electrical ignition system
US2503054A (en) Spark ignition system for internalcombustion prime movers
US3601688A (en) Voltage regulator for permanent magnet generators
US3394689A (en) Resonant ignition system
US2131018A (en) Ignition system for internal combustion engines
US2748318A (en) Electric spark ignition apparatus
GB1361724A (en) Ignition system for internal combustion engines
US2697184A (en) Electric spark ignition apparatus
GB1330504A (en) Pulse generating apparatus
GB1288956A (en)
US3086144A (en) Gas turbine ignition system
US2003466A (en) Spark generating system
US609250A (en) Electrical Igniter For Gas-Engines
US2247075A (en) Electric ignition system
US2037059A (en) Internal combustion engine
US2927248A (en) Spark producing apparatus and adaptors therefor
US3428823A (en) Spark igniter