US3751609A - Ignition distributor cap with isolated capacitor and resistor - Google Patents

Ignition distributor cap with isolated capacitor and resistor Download PDF

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Publication number
US3751609A
US3751609A US00255482A US3751609DA US3751609A US 3751609 A US3751609 A US 3751609A US 00255482 A US00255482 A US 00255482A US 3751609D A US3751609D A US 3751609DA US 3751609 A US3751609 A US 3751609A
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US
United States
Prior art keywords
body part
distributor
cap
resistor
distributor cap
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
US00255482A
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English (en)
Inventor
N Jukes
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 US3751609A publication Critical patent/US3751609A/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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/02—Checking or adjusting ignition timing
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • 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
    • F02P7/021—Mechanical distributors

Definitions

  • the ignition distributor cap comprises an insulating body carrying an input terminal and a series of output terminals for successive contact by a rotor arm of the distributor.
  • a connector forms with the input terminal a ca pacitor the dielectric of which is the material of the .body.
  • a resistor is connected to one of the output terrninals and to a furtherconnector.
  • PATENTED A115 7 I973 SHEET 1 OF 2 IGNITION DISTRIBUTOR CAP WITH ISOLATED CAPACITOR AND RESISTOR This invention relates to caps for ignition distributors, and has for its object to provide such a cap in a form suitable for use in diagnostic equipment for indicating faults.
  • a distributor cap comprises an insulating body part for connection to the distributor, the body part having an input terminal which when the cap is in position engages the rotor arm of the distributor, and a plurality of output terminals, one for each spark plug of the engine, there being further provided a terminal zone in or on the body part and defining with one of the terminals a capacitor having as its dielectric the material of the body part.
  • the capacitor is defined between the terminal zone and the input terminal.
  • a resistor is connected between one of the output terminals and a further terminal zone on the body.
  • FIG. 1 is a perspective view of an ignition distributor cap according to the present invention
  • FIG. 2 is a sectional view of part of a modified distributor cap also according to the present invention.
  • FIGS. 3 and 4 are part sectional views of parts of a further form of distributor cap according to the present invention.
  • a distributor cap includes a molded insulating body 11 having an input terminal 12 and four output terminals 13.
  • the cap is adapted for connection to a connection is completed from an ignition coil by way of the terminal 12 and a spring loaded brush to a rotor arm (not shown) within the distributor body.
  • the rotor arm then completes electrical circuits by way of the output terminals 13 to the spark plugs of the engine in turn.
  • the body part 11 is moulded with two slots 14 and 15 and within the slots 14 and 15 are blade connectors 16 and 17 respectively.
  • the connectors 16 and 17 are adapted for connection to diagnostic equipment, and the connector 16 forms with the input terminal 12 a capacitor, the dielectric of which is constituted by the material of the body part 11. 1 J I
  • the connector 17 is connected to one of the terminals 13 through a megohm resistor (indicated generally by reference numeral 18).
  • the diagnostic equipment receives signals indicating the voltage at the input to the rotor,"arm.aThe signal from connection 17- enables the readings obtained at terminal 16 to be related to a known spark plug.
  • the ignition distributor cap illustrated therein is similar to that shown in FIG. 1 and comprises an insulating body 111 with an input terminal 1 l2 and four output terminals 113.
  • An annular conductor 116 surrounding the terminal 112 and having a connector leading to the outside of the body 1 1 1 forms with the input terminal 112 a capacitor, the dielectric of which is constituted by the material of the body 1 1 1.
  • nector of conductor 116 to be related to a known spark plug.
  • the distributor cap illustrated therein is similar to that of FIG. 2 and comprises an insulating body 211 with an input terminal 212 and four output terminals 213 (only one shown).
  • An annular conductor 216 surrounds the terminal 212 and has a connector 225 leading to an electrical plug pin 226 on the body 211.
  • the annular conductor 216 forms, with the input terminal 212 a capacitor, the dielectric of which is constituted by the material of the body 211.
  • a resistor 217 is located in a recess 218 in the body 211 and is connected to one of the input terminals 1 13 by a conducting plate 219.
  • the resistor 217 is connected via a spring 222 to a conductor 221 which leads to another pin 227 on the body.
  • the diagnostic equipment is connected by means of a single multi-way electrical socket connector (not shown) engaged with the pins 226 and 227 with suitable provision for weatherprooflng.
  • Resistors may be provided for more than just one of the distributor outlet terminals so that the reading related to more than one sparking plug can be obtained.
  • a distributor cap comprising an insulating body part for connection to the distributor, said body part having an input terminal which whenv said cap is in position engages the rotor arm of the distributor, a plurality of output terminals, one for each spark plug of the engine, a conductor surrounding one of said terminals and being spaced therefrom by a portion of the material of said body part, a capacitor defined by said conductor and saidone of said tenninals, the dielectric of said capacitor being said portion of the material of said body part, and a further terminal extending from said conductor.

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)
US00255482A 1971-06-12 1972-05-22 Ignition distributor cap with isolated capacitor and resistor Expired - Lifetime US3751609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2766171A GB1389196A (en) 1971-06-12 1971-06-12 Ignition distributor caps

Publications (1)

Publication Number Publication Date
US3751609A true US3751609A (en) 1973-08-07

Family

ID=10263212

Family Applications (1)

Application Number Title Priority Date Filing Date
US00255482A Expired - Lifetime US3751609A (en) 1971-06-12 1972-05-22 Ignition distributor cap with isolated capacitor and resistor

Country Status (6)

Country Link
US (1) US3751609A (de)
AU (1) AU458428B2 (de)
DE (1) DE2228607C3 (de)
FR (1) FR2139600A5 (de)
GB (1) GB1389196A (de)
ZA (1) ZA723473B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018787A1 (de) * 1980-05-16 1981-11-26 Robert Bosch Gmbh, 7000 Stuttgart Kontaktlos gesteuerte spulenzuendanlage fuer brennkraftmaschinen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2365925A (en) * 1942-06-02 1944-12-26 Ford Motor Co Electrical distributor
FR1184879A (fr) * 1957-10-19 1959-07-27 Tech Electronique Perfectionnements aux dispositifs anti-parasites pour moteurs à explosion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2365925A (en) * 1942-06-02 1944-12-26 Ford Motor Co Electrical distributor
FR1184879A (fr) * 1957-10-19 1959-07-27 Tech Electronique Perfectionnements aux dispositifs anti-parasites pour moteurs à explosion

Also Published As

Publication number Publication date
AU4272172A (en) 1973-11-29
ZA723473B (en) 1973-03-28
DE2228607C3 (de) 1980-03-27
GB1389196A (en) 1975-04-03
DE2228607A1 (de) 1972-12-21
DE2228607B2 (de) 1979-07-12
FR2139600A5 (de) 1973-01-05
AU458428B2 (en) 1975-02-27

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