US3903861A - Electronic circuit by which electric current is fed to spark plugs of an engine - Google Patents

Electronic circuit by which electric current is fed to spark plugs of an engine Download PDF

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Publication number
US3903861A
US3903861A US347489A US34748973A US3903861A US 3903861 A US3903861 A US 3903861A US 347489 A US347489 A US 347489A US 34748973 A US34748973 A US 34748973A US 3903861 A US3903861 A US 3903861A
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US
United States
Prior art keywords
capacitor
circuit
range
feeder
resistor
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
US347489A
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English (en)
Inventor
Cecco Enio Di
Mario Totti
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.)
SAFE ELECTRONIC SYSTEMS SA
SAFE ELECTRONIC SYSTEMS AG
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SAFE ELECTRONIC SYSTEMS SA
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.)
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Publication date
Application filed by SAFE ELECTRONIC SYSTEMS SA filed Critical SAFE ELECTRONIC SYSTEMS SA
Application granted granted Critical
Publication of US3903861A publication Critical patent/US3903861A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the main object of this circuit for consists in the provision of a capacitive discharge electronic for feeding the spark plugs of an engine, that shows a very low power input (eg about 1.6-1.7 A 6,000 RPM) even at the higher RPM of engine.
  • Another object consists in the provision of a circuit of the above stated type wherein, when the thyristor is short-circuited, the current flowing through the power feeding unit is decreased (instead of increasing, or even remaining steady), when compared with the current flowing through same unit when this is directly connected with the battery.
  • a further object of the invention is the provision of an ignition circuit which, even in tropical climates and under unusually severe and protracted conditions of operation, is not subjected to overheating, thus maintaining their operating features nearly unchanged.
  • the circuitry as shown in the drawing comprises a feeder-booster connected with a capacitive discharge circuit.
  • Said feeder-booster is shown below the broken line in the drawing, and their two terminals 1,2 can be connected with a low voltage D.C. source, e. g. with the battery of the motor car.
  • the terminal 1 is designed to be connected with the positive pole of said battery.
  • diode D7 when the temperature increases, a decrease in the resistance of diode D7 occurs, which results in a polarization voltage increasing with the increase in the temperature being applied to the bases of transistors T1 and T2, when they are made non-conductive by the inhibition of diode SCR (which will be described in more detail later on). Thus, the current flow across the transistors T1 and T2 is reduced, whereby undesired overheating is prevented.
  • the presence of diode D7 is essential only in exceptional cases, eg when the circuitry is operated at very high ambient temperatures, with high discharge frequencies and with large power inputs.

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)
US347489A 1972-06-23 1973-04-03 Electronic circuit by which electric current is fed to spark plugs of an engine Expired - Lifetime US3903861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT26144/72A IT959941B (it) 1972-06-23 1972-06-23 Circuito elettronico per l alimen tazione della corrente elettrica alle candele di un motore a scoppio

Publications (1)

Publication Number Publication Date
US3903861A true US3903861A (en) 1975-09-09

Family

ID=11218737

Family Applications (1)

Application Number Title Priority Date Filing Date
US347489A Expired - Lifetime US3903861A (en) 1972-06-23 1973-04-03 Electronic circuit by which electric current is fed to spark plugs of an engine

Country Status (26)

Country Link
US (1) US3903861A (enrdf_load_html_response)
JP (1) JPS4950333A (enrdf_load_html_response)
AR (1) AR202102A1 (enrdf_load_html_response)
AT (1) AT327616B (enrdf_load_html_response)
AU (1) AU474935B2 (enrdf_load_html_response)
BE (1) BE798868A (enrdf_load_html_response)
BR (1) BR7304649D0 (enrdf_load_html_response)
CA (1) CA1005856A (enrdf_load_html_response)
CH (1) CH577629A5 (enrdf_load_html_response)
CS (1) CS171285B2 (enrdf_load_html_response)
DD (1) DD105290A5 (enrdf_load_html_response)
DE (1) DE2317988C3 (enrdf_load_html_response)
DK (1) DK139915B (enrdf_load_html_response)
ES (1) ES416446A1 (enrdf_load_html_response)
FI (1) FI58203C (enrdf_load_html_response)
FR (1) FR2199808A5 (enrdf_load_html_response)
GB (1) GB1412205A (enrdf_load_html_response)
IL (1) IL42751A (enrdf_load_html_response)
IT (1) IT959941B (enrdf_load_html_response)
NL (1) NL7304691A (enrdf_load_html_response)
RO (1) RO89668A (enrdf_load_html_response)
SE (1) SE394725B (enrdf_load_html_response)
SU (1) SU569294A3 (enrdf_load_html_response)
TR (1) TR17699A (enrdf_load_html_response)
YU (1) YU35286B (enrdf_load_html_response)
ZA (1) ZA734271B (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136659A (en) * 1975-11-07 1979-01-30 Smith Harold J Capacitor discharge ignition system
DE3131844A1 (de) * 1981-08-12 1983-04-14 Peter 2000 Hamburg Sturzrehm Kondensatorzuendanlage fuer verbrennungsmotore
US4457285A (en) * 1981-11-24 1984-07-03 Nissan Motor Company, Ltd. Sustained arc ignition system for an internal combustion engine
CN116085162A (zh) * 2023-04-10 2023-05-09 无锡全裕电子科技有限公司 一种锂电池作为电源的高压清洗车点火管理系统

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372682A (en) * 1965-03-10 1968-03-12 Lucas Industries Ltd Spark ignition systems for internal combustion engines
US3487822A (en) * 1967-11-29 1970-01-06 Motorola Inc Capacitor discharge ignition system
US3546528A (en) * 1968-01-24 1970-12-08 Rca Corp Capacitor discharge ignition circuit
US3552368A (en) * 1968-11-08 1971-01-05 Gen Motors Corp Current responsive converter circuit
US3599616A (en) * 1968-08-22 1971-08-17 Nippon Denso Co Ignition system for internal combustion engines
US3658044A (en) * 1970-12-08 1972-04-25 Alden L Safstrom Capacitor discharge ignition system
US3692009A (en) * 1969-10-18 1972-09-19 Bosch Gmbh Robert Ignition arrangements for internal combustion engines
US3699940A (en) * 1971-07-14 1972-10-24 Motorola Inc Initiation circuit for a capacitor discharge ignition system
US3715650A (en) * 1971-11-23 1973-02-06 Brunswick Corp Pulse generator for ignition systems
US3722489A (en) * 1969-03-13 1973-03-27 Howard Ass Inc Electronic relay and ignition system utilizing same
US3808513A (en) * 1972-04-21 1974-04-30 Texaco Inc Ignition system including dc-ac inverter
US3818885A (en) * 1973-02-20 1974-06-25 Texaco Inc High-frequency continuous-wave ignition system

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372682A (en) * 1965-03-10 1968-03-12 Lucas Industries Ltd Spark ignition systems for internal combustion engines
US3487822A (en) * 1967-11-29 1970-01-06 Motorola Inc Capacitor discharge ignition system
US3546528A (en) * 1968-01-24 1970-12-08 Rca Corp Capacitor discharge ignition circuit
US3599616A (en) * 1968-08-22 1971-08-17 Nippon Denso Co Ignition system for internal combustion engines
US3552368A (en) * 1968-11-08 1971-01-05 Gen Motors Corp Current responsive converter circuit
US3722489A (en) * 1969-03-13 1973-03-27 Howard Ass Inc Electronic relay and ignition system utilizing same
US3692009A (en) * 1969-10-18 1972-09-19 Bosch Gmbh Robert Ignition arrangements for internal combustion engines
US3658044A (en) * 1970-12-08 1972-04-25 Alden L Safstrom Capacitor discharge ignition system
US3699940A (en) * 1971-07-14 1972-10-24 Motorola Inc Initiation circuit for a capacitor discharge ignition system
US3715650A (en) * 1971-11-23 1973-02-06 Brunswick Corp Pulse generator for ignition systems
US3808513A (en) * 1972-04-21 1974-04-30 Texaco Inc Ignition system including dc-ac inverter
US3818885A (en) * 1973-02-20 1974-06-25 Texaco Inc High-frequency continuous-wave ignition system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136659A (en) * 1975-11-07 1979-01-30 Smith Harold J Capacitor discharge ignition system
DE3131844A1 (de) * 1981-08-12 1983-04-14 Peter 2000 Hamburg Sturzrehm Kondensatorzuendanlage fuer verbrennungsmotore
US4457285A (en) * 1981-11-24 1984-07-03 Nissan Motor Company, Ltd. Sustained arc ignition system for an internal combustion engine
CN116085162A (zh) * 2023-04-10 2023-05-09 无锡全裕电子科技有限公司 一种锂电池作为电源的高压清洗车点火管理系统

Also Published As

Publication number Publication date
BR7304649D0 (pt) 1974-08-15
ATA500573A (de) 1975-04-15
JPS4950333A (enrdf_load_html_response) 1974-05-16
DE2317988A1 (de) 1974-01-17
DE2317988C3 (de) 1978-06-29
AU5719373A (en) 1975-01-09
AR202102A1 (es) 1975-05-15
YU168873A (en) 1980-04-30
SE394725B (sv) 1977-07-04
IL42751A0 (en) 1973-10-25
YU35286B (en) 1980-10-31
NL7304691A (enrdf_load_html_response) 1973-12-27
DK139915C (enrdf_load_html_response) 1979-10-08
ZA734271B (en) 1974-06-26
TR17699A (tr) 1975-07-23
AU474935B2 (en) 1976-08-05
SU569294A3 (ru) 1977-08-15
AT327616B (de) 1976-02-10
FR2199808A5 (enrdf_load_html_response) 1974-04-12
IL42751A (en) 1976-06-30
FI58203C (fi) 1980-12-10
DK139915B (da) 1979-05-14
RO89668A (ro) 1986-06-30
DD105290A5 (enrdf_load_html_response) 1974-04-12
CS171285B2 (enrdf_load_html_response) 1976-10-29
IT959941B (it) 1973-11-10
CH577629A5 (enrdf_load_html_response) 1976-07-15
ES416446A1 (es) 1976-03-01
CA1005856A (en) 1977-02-22
BE798868A (fr) 1973-08-16
DE2317988B2 (de) 1977-10-27
GB1412205A (en) 1975-10-29
FI58203B (fi) 1980-08-29

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