US3742312A - Ignition coils - Google Patents

Ignition coils Download PDF

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Publication number
US3742312A
US3742312A US00289274A US3742312DA US3742312A US 3742312 A US3742312 A US 3742312A US 00289274 A US00289274 A US 00289274A US 3742312D A US3742312D A US 3742312DA US 3742312 A US3742312 A US 3742312A
Authority
US
United States
Prior art keywords
core
terminal
casing
capacitor
conductive
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
US00289274A
Other languages
English (en)
Inventor
P Hillyard
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 US3742312A publication Critical patent/US3742312A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • 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
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H01F2038/125—Ignition, e.g. for IC engines with oil insulation

Definitions

  • This invention relates to ignition coils for internal combustion engine ignition systems and has for its object to provide an ignition coil in a form suitable for use in conjunction with fault diagnosing equipment.
  • An ignition coil includes, a hollow casing closed at one end by an insulating cap carrying the high tension output terminal of the coil, a conductive core within the casing and electrically connected to said high tension terminal, an insulating support member engaging one end of said core, primary and secondary windings encircling said core with one end of the secondary winding electrically connected to the core, a conductive member spaced from said core by said insulating support member said conductive member defining with the core a capacitor the dielectric of which is the material of said support member, and a terminal on the cap of the ignition coil electrically connected to said conductive member so that said terminal and said high tension output terminal constitute the terminals of the said capacitor.
  • said conductive member is a metal plate interposed between the support member and a closed end of the casing opposite said cap.
  • the casing is conductive and said conductive member is insulated therefrom, the member and the casing defining a second capacitor.
  • FIG. 1 is a diagrammatic representation, partly in section of an ignition coil in accordance with one example of the invention.
  • FIG. 2 is a circuit diagram illustrating the way in which the coil can be used in diagnostic equipment.
  • the ignition coil includes a hollow cylindrical metal casing 11 closed at one end by an integral base 12, and closed at its other end by a moulded synthetic resin cap 13.
  • the open end of the casing 11 is spun over to grip the cap 13.
  • the cap 13 carries a high tension output terminal 14 together with the usual pair of low tension terminals (not shown).
  • the cap carries a further terminal 15 connected by way of a conductive lead 16 to a metal plate 17 positioned adjacent the base 12.
  • the plate 17 is spaced from the base 12 by an insulating disc 18, and trapping the plate 17 against the disc 18 is a hollow insulating support member 19 moulded in glass.
  • a laminated conductive core 21 Electrically connected at its one end to the high tension terminal 13.
  • the core 21 extends through a tubular paper former upon which are wound the secondary and primary windings of the ignition coil.
  • one end of the 22a, 22b secondary winding is electrically connected to the core 21, while the other end of the secondary winding and one end of the primary winding are electrically connected to one of said pair of terminals on the cap 13, the other end.
  • the core 21 and the plate 17 are spaced apart by the base region of the glass support member 19, and the core 21 and the plate 17 define a capacitor 23 (FIG. 2) the dielectric of which is the glass base of the member 19.
  • the high tension terminal 14 constitutes one terminal of this capacitor while the terminal 15 provided on the cap 13 constitutes the other terminal of the capacitor.
  • the support member 19 could be formed from materials other than glass provided they exhibit the desired dielectric and insulating properties. Phenolic resins have been used and are suitable for some applications even though their permittivity varies with temperature to a larger degree than glass.
  • the inner surface of the casing of the ignition coil is provided with a paper sleeve which separates an inner iron sleeve from the casing 1 1.
  • the casing is filled with oil.
  • FIG. 2 shows the secondary winding 22a of the ignition coil with its ends connected in the way described above to the high tension terminal 14 and the terminal E of the ignition coil respectively the terminal E being connected to earth through a low impedance path in use.
  • the coil produces an alternating output having a voltage of the order of 30,000 volts, and if the vehicle on which the coil is employed is to be tested using automatic diagnostic equipment of the kind which tests various parts of the vehicle for faults, then it is necessary to step down this voltage, which can be accomplished readily by providing a pair of capacitors 23 and 24 in series across the winding 22a, and taking a voltage from the junction of the capacitors 23 and 24.
  • Typical values for the capacitors 23 and 24 would be 5 p.f. and 5,000 p.f. respectively, giving a voltage between the junction of the capacitors and the terminal E of 30 volts.
  • the terminal at the junction of the capacitors 23 and 24 is the terminal 15 with the capacitor 23 within the ignition coil constituted by the core 21, the plate 17 and the support 19.
  • the capacitor 24 is a separate capacitor connected between the terminal 15 and the terminal E externally of the coil, but it is to be noted that since the casing 11 of the coil is, in use, at earth potential then the plate 17 and the base 12 define a capacitor in parallel with the capacitor 24 and so the capacitance of the capacitor 24 is chosen accordingly bearing in mind to total capacitance required between the terminals E and 15.
  • An ignition coil for an internal combustion engine ignition system, comprising a hollow casing closed at one end by an insulating cap carrying the high tension output terminal of the coil, a conductive core within the casing and electrically connected to said high tension terminal, an insulating support member engaging one end of said core, primary and secondary windings, encircling said core with one end of the secondary winding electrically connected to the core, a conductive member spaced from said core by said insulating support member said conductive member defining with the core a capacitor the dielectric of which is the material of said support member, and, a terminal on the cap of the ignition coil electrically connected to said conductive member so that said terminal and said high tension output terminal constitute the terminals of the said capacitor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US00289274A 1971-09-15 1972-09-15 Ignition coils Expired - Lifetime US3742312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4290571A GB1399604A (en) 1971-09-15 1971-09-15 Ignition coils

Publications (1)

Publication Number Publication Date
US3742312A true US3742312A (en) 1973-06-26

Family

ID=10426494

Family Applications (1)

Application Number Title Priority Date Filing Date
US00289274A Expired - Lifetime US3742312A (en) 1971-09-15 1972-09-15 Ignition coils

Country Status (7)

Country Link
US (1) US3742312A (enrdf_load_stackoverflow)
JP (1) JPS5320089B2 (enrdf_load_stackoverflow)
AU (1) AU461983B2 (enrdf_load_stackoverflow)
DE (1) DE2245194C3 (enrdf_load_stackoverflow)
FR (1) FR2153112B1 (enrdf_load_stackoverflow)
GB (1) GB1399604A (enrdf_load_stackoverflow)
IT (1) IT965321B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673907A (en) * 1985-12-19 1987-06-16 General Electric Company Transformer with amorphous alloy core having chip containment means
WO1987004001A1 (en) * 1985-12-19 1987-07-02 General Electric Company Transformer with amorphous alloy core having chip containment means
US5419300A (en) * 1992-11-10 1995-05-30 Honda Giken Kogyo Kabushiki Kaisha Ignition coil unit with ignition voltage detective capacitor for internal combustion engine
WO2007122633A1 (en) * 2006-04-24 2007-11-01 India Nippon Electicals Ltd A bobbin for secondary winding of ignition coil

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51133817U (enrdf_load_stackoverflow) * 1975-04-21 1976-10-28
JPS564948Y2 (enrdf_load_stackoverflow) * 1975-04-21 1981-02-03
JPS5216031U (enrdf_load_stackoverflow) * 1975-07-23 1977-02-04
JPS5229620U (enrdf_load_stackoverflow) * 1975-08-22 1977-03-02
JPS5257135U (enrdf_load_stackoverflow) * 1975-10-24 1977-04-25
JPS58104317A (ja) * 1981-12-16 1983-06-21 Nissan Motor Co Ltd Ｖ型機関の排気路
JPS6136135U (ja) * 1984-08-06 1986-03-06 ダイハツ工業株式会社 タ−ボチヤ−ジヤの配管装置
JPS6141993U (ja) * 1984-08-23 1986-03-18 日本ヴイクトリツク株式会社 偏心吸収管継手
DE9216908U1 (de) * 1992-12-11 1994-04-14 Jenbacher Energiesysteme AG, Jenbach Hochspannungstransformator
DE102006025073A1 (de) * 2006-05-30 2007-12-06 Robert Bosch Gmbh Zündspule
JP5611031B2 (ja) 2008-03-27 2014-10-22 株式会社クボタ 膜モジュールおよび膜カセット

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673907A (en) * 1985-12-19 1987-06-16 General Electric Company Transformer with amorphous alloy core having chip containment means
WO1987004001A1 (en) * 1985-12-19 1987-07-02 General Electric Company Transformer with amorphous alloy core having chip containment means
US5419300A (en) * 1992-11-10 1995-05-30 Honda Giken Kogyo Kabushiki Kaisha Ignition coil unit with ignition voltage detective capacitor for internal combustion engine
WO2007122633A1 (en) * 2006-04-24 2007-11-01 India Nippon Electicals Ltd A bobbin for secondary winding of ignition coil
US20090219125A1 (en) * 2006-04-24 2009-09-03 India Nippon Electicals Ltd Bobbin for secondary winding of ignition coil
US7843305B2 (en) 2006-04-24 2010-11-30 India Nippon Electricals Ltd. Bobbin for secondary winding of ignition coil

Also Published As

Publication number Publication date
DE2245194A1 (de) 1973-03-22
DE2245194B2 (de) 1979-05-03
GB1399604A (en) 1975-07-02
IT965321B (it) 1974-01-31
AU4640472A (en) 1974-03-21
FR2153112A1 (enrdf_load_stackoverflow) 1973-04-27
FR2153112B1 (enrdf_load_stackoverflow) 1976-05-21
JPS5320089B2 (enrdf_load_stackoverflow) 1978-06-24
AU461983B2 (en) 1975-06-12
JPS4837525A (enrdf_load_stackoverflow) 1973-06-02
DE2245194C3 (de) 1979-12-13

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