US3890947A - Distributor for engine ignition system - Google Patents

Distributor for engine ignition system Download PDF

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Publication number
US3890947A
US3890947A US390517A US39051773A US3890947A US 3890947 A US3890947 A US 3890947A US 390517 A US390517 A US 390517A US 39051773 A US39051773 A US 39051773A US 3890947 A US3890947 A US 3890947A
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US
United States
Prior art keywords
electrode
rotor
ignition
peripheral
ignition plug
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
US390517A
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English (en)
Inventor
Masao Shibagaki
Masayoshi Oonishi
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.)
Mazda Motor Corp
Original Assignee
Toyo Kogyo Co 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 Toyo Kogyo Co Ltd filed Critical Toyo Kogyo Co Ltd
Application granted granted Critical
Publication of US3890947A publication Critical patent/US3890947A/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
    • 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
    • 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
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/063—Mechanical pick-up devices, circuit-makers or -breakers, e.g. contact-breakers

Definitions

  • ABSTRACT A distributor for an engine ignition system which comprises a rectangular electrode and a pair of U-shaped electrodes fitted on the distributor rotor.
  • the rectangular electrode is used as a central electrode input side and the U-shaped electrodes are used as a high voltage input electrode side.
  • Different .U-shaped electrodes are alternatively used in each 90 rotation of the rotor so that the mold for the preparation of the distributor is greatly simplified and erroneous discharges to undesired ignition plugs can be prevented.
  • the double high voltage distribution systems form independent ignition systems.
  • the distributor rotor forms a ring electrode, so that a mold for preparing the body is complicated.
  • abrasion of the carbon in contact with the ring electrode occurs more rapidly than that of the carbon fitted on the central electrode due to the faster peripheral velocity.
  • the abrasion creates powdery carbon which impairs the sparking characteristics of the system.
  • the high voltage is applied to the high voltage input electrode, the high voltage is applied to the ring electrode, so that it is difficult to increase the other ignition system of central electrode, the 180 electrode and the space from the peripheral cap electrode; however, a high mix gas pressure is applied to the appropriate ignition plug so that the spark discharging voltage is high.
  • the spark discharge is very difficult to achieve so that an erroneous discharge to an undesired ignition plug may occur.
  • the peripheral cap electrode, the ring electrode and the space between the ring electrode and the central electrode are increased, or the space between the rotary electrode of the distributor rotor and the ring electrode is increased in the axial direction.
  • the total size of the distributor increases and the axial length is long. This disadvantageously requires a large space to fit the distributor.
  • a distributor for an engine ignition system which comprises an elongated, substantially rectangular electrode and a pair of U-shaped electrodes fitted on the distributor rotor wherein the rectangular electrode is used in the central electrode side and the U-shaped electrodes are used in the high voltage input electrode side and a different U-shaped electrode is alternatively used in each rotation of the rotor.
  • FIG. 1 is a plan view of an embodiment of a distributor cap according to the present invention.
  • FIG. 2 is a schematic view of a preferred embodiment distribution system according to the present invention.
  • FIGS. 3A, 3B, 3C and 3D illustrate the firing sequence of the distribution system of FIG. 2.
  • FIGS. 1 and 2 a preferred embodiment according to this invention is illustrated as comprising a distributor cap 1; a central electrode 2; a first peripheral electrode 3; a second peripheral electrode 4; a high voltage input electrode 5; a third peripheral electrode 6; a fourth peripheral electrode 7; an elongated, substantially rectangular electrode 8 of a distribution rotor 1 l; a U-shaped first electrode 9 of distribution rotor l l; a U-shaped second electrode 10 of distribution rotor 11; a battery 12; a first ignition coil 13; a first interrupter 14; a condenser 15 for preventing a spark during the contact of the first interrupter 14; a second ignition coil 16; a second interrupter 1.7; a condenser 18 for preventing a spark during the contact of the second interrupter 17; a first ignition coil 13; a first interrupter 14; a condenser 15 for preventing a spark during the contact of the first interrupter 14; a second ignition coil 16; a second interrupter 1.7;
  • the reference numerals 3a, 4a, 5a, 6a and 7a designate peripheral cap electrodes and high voltage input electrodes which alternately face the rectangular electrode 8 and the first and second U- shaped electrodes 9 and 10, in a manner which will be described more fully hereinafter.
  • the first ignition system is formed by the first ignition coil 13, the first interrupter 14, the condenser 15, the central electrode 2, the rectangular electrode 8, the first peripheral electrodes 3 and 3a, the second peripheral electrodes 4 and 4a, the first ignition plug 19, and the second ignition plug 20.
  • the second ignition system is formed by the second ignition coil 16, the second interrupter 17, the condenser 18, the high voltage input electrodes 5 and 5a, the first U-shaped electrode 9, the third peripheral electrodes 6 and 6a, the third ignition plug 21, the second U-shaped electrode 10, the fourth peripheral electrodes 7 and 7a, and the fourth ignition plug 22.
  • a high voltage (such as 30 KV) is induced in the secondary winding of the first ignition coil 13.
  • the high voltage is applied to the central electrode 2 and is supplied through a carbon electrode to the first electrode 3 facing the rectangular electrode 8, so that the first ignition plug 19 of the first cylinder 23 creates a spark discharge to contribute to the rotation of the engine.
  • the second interrupter 17 When the second interrupter 17 is converted from a turn-on to a turn-off condition (with a short delay from the first interrupter 14), a high voltage is induced in the second ignition coil 16 and is supplied through the high voltage input electrodes 5 and 5a, through the second U-shaped electrode to the third electrodes 6 and 6a, so that a spark-discharge is created in the third ignition plug 21 of the first cylinder 23. That is, in the first cylinder 23, the third ignition plug 21 is spark-discharged with a phase delay of a certain angle after the ignition of the first ignition plug 19.
  • the engine is recycled and the first inter rupter 14 and the second interrupter 17 are turned on to accumulate energy in the primary of the ignition coils 13 and 16 by reversing the first interrupter 14 and the second interrupter 17, and then the first interrupter 14 is turned off.
  • the distribution rotor 11 is advanced 90 clockwise within cap 1 from the position shown in FIG. 2.
  • the rectangular electrode 8 then faces the second electrodes 4 and 4a, and the first U- shaped electrode 9 connects the high voltage input electrodes 5 and 5a to the fourth peripheral electrodes 7 and'7a.
  • a high voltage is applied from the first ignition coil 13 to the central electrode 2, and is supplied through the rectangular electrode 8 to the second electrode 4 so as to create a spark discharge at the second ignition plug of the second cylinder 24.
  • a high voltage is induced in the second ignition coil 16 and is applied to the high voltage input electrode 5 and to the fourth electrode 7 by the first U- shaped electrode 9, so as to create a spark discharge in .the fourth ignition plug 22 of the second cylinder 24,
  • the ignition systems thus form independent ignition systems.
  • a rectangular electrode and a pair of U-shaped electrodes are fitted on the distributor rotor 11.
  • the rectangular electrode is used as a central electrode and the U-shaped electrodes are used as high voltage input electrodes set in the periphery of the cap, and a different U-shaped electrode is alternatively used in each 90 rotation, so that the mold for the preparation of the distributor is greatly simplified.
  • the high voltage input electrodes whose peripheral velocity is high are of the gap type, so that the trouble in the prior art caused by powdery carbon is virtually eliminated.
  • the pair of U-shaped electrodes are arranged in positions of 180 phase. so that an erroneous discharge to an undesired ignition plug can be prevented, and the distributor can be made compact to provide quite advantageous results.
  • FIGS. 3A, 3B, 3C and 3D illustrate the firing sequence of the distribution system of FIG. 2.
  • the firing sequence is 1324 and is accomplished in the following manner.
  • first ignition coil 13 is connected to first ignition plug 19 by electrode 8 through the dotted lines shown in the FIGURE.
  • Second ignition coil 16 is connected to third ignition plug 21 by electrode 10.
  • First ignition coil 13 is fired first igniting first ignition plug 19.
  • Second ignition coil 16 is then fired igniting third ignition plug 21.
  • Neither second ignition plug 20 nor fourth ignition plug 22 is ignited during this position of the distribution rotor.
  • the distribution rotor is then rotated clockwise so that the position shown in FIG. 3B is realized.
  • First ignition coil 13 is again fired first and ignites second ignition plug 20 through electrode 8.
  • Second ignition coil 16 is fired thereafter to ignite fourth ignition plug 22 through electrode 9. Note that during this position of the distribution rotor there is no connection between ignition coils 13 and 16 and first and third ignition plugs 19 and 21.
  • the distribution rotor is then rotated 90 further in a clockwise direction until the position shown in FIG. 3C is assumed. Note that the position shown in FIG. 3C is similar to that shown in FIG. 3A with the exception that electrodes 9 and 10 have reversed positions. It is believed clear from FIG. 3C that the firing sequences in FIGS. 3A and 3C are identical.
  • the distribution rotor is then rotated 90 further in a clockwise direction until the position shown in 3D is assumed. It is believed apparent that the position in FIG. 3D is similar to the position shown in FIG. 3B with the exception that electrodes 9 and 10 have reversed positions. It is also believed clear that the firing sequences of FIGS. 38 and 3D are identical.
  • the firing sequence is 13-241-3-24 for every 360 rotation of the distribution rotor.
  • An ignition system comprising a first ignition plug
  • said first, second, third, fourth and fifth peripheral electrodes being mounted to a distributor cap so that each of said peripheral electrodes is equidistant from the center of said distributor cap and so that said peripheral electrodes are disposed in a clockwise direction with the second electrode 90 from the first electrode, the fourth electrode 45 from the second electrode, the fifth electrode 90 from the fourth electrode and the third electrode 90 from the fifth electrode,
  • a first rotor electrode being mounted to said distribution rotor so that its ends span a first are on said distribution rotor and on said distribution cap of 90
  • a second rotor electrode being mounted to said distribution rotor so that its ends span a second arc on said distribution rotor and on said distribution cap of 90 and so that said first arc and second are are diametrically opposed
  • a third rotor electrode being mounted to said distribution rotor so that its ends span a third are on said distribution rotor and on said distribution cap of 180 and so that the ends of said third electrode lie midway between adjacent ends of said first and second rotor electrodes,

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)
US390517A 1972-08-29 1973-08-22 Distributor for engine ignition system Expired - Lifetime US3890947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972100785U JPS5244743Y2 (US20080005853A1-20080110-C00027.png) 1972-08-29 1972-08-29

Publications (1)

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US3890947A true US3890947A (en) 1975-06-24

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Family Applications (1)

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US390517A Expired - Lifetime US3890947A (en) 1972-08-29 1973-08-22 Distributor for engine ignition system

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US (1) US3890947A (US20080005853A1-20080110-C00027.png)
JP (1) JPS5244743Y2 (US20080005853A1-20080110-C00027.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064858A (en) * 1976-08-05 1977-12-27 Louis Forde Ignition system with multiplex distributor for engines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1136406A (en) * 1915-04-20 John Wilburn Butts Water system.
US1604630A (en) * 1925-11-25 1926-10-26 Stockholders Syndicate Process of treating vanadium compounds
US2555488A (en) * 1947-10-22 1951-06-05 Gen Motors Corp Distributor rotor
US2954506A (en) * 1959-06-15 1960-09-27 Briggs & Stratton Corp Means for timing plug firing in piezoelectric ignition system
US3028563A (en) * 1959-06-29 1962-04-03 Gen Dynamics Corp Coaxial transfer switch
US3435161A (en) * 1967-05-08 1969-03-25 Millard A Webster Rotary type distributor
US3504141A (en) * 1969-03-24 1970-03-31 Millard A Webster Rotary distributor
US3794008A (en) * 1972-05-18 1974-02-26 Laval Turbine California Inc D Spark ignition system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4115205Y1 (US20080005853A1-20080110-C00027.png) * 1964-04-13 1966-07-16

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1136406A (en) * 1915-04-20 John Wilburn Butts Water system.
US1604630A (en) * 1925-11-25 1926-10-26 Stockholders Syndicate Process of treating vanadium compounds
US2555488A (en) * 1947-10-22 1951-06-05 Gen Motors Corp Distributor rotor
US2954506A (en) * 1959-06-15 1960-09-27 Briggs & Stratton Corp Means for timing plug firing in piezoelectric ignition system
US3028563A (en) * 1959-06-29 1962-04-03 Gen Dynamics Corp Coaxial transfer switch
US3435161A (en) * 1967-05-08 1969-03-25 Millard A Webster Rotary type distributor
US3504141A (en) * 1969-03-24 1970-03-31 Millard A Webster Rotary distributor
US3794008A (en) * 1972-05-18 1974-02-26 Laval Turbine California Inc D Spark ignition system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064858A (en) * 1976-08-05 1977-12-27 Louis Forde Ignition system with multiplex distributor for engines

Also Published As

Publication number Publication date
JPS4956325U (US20080005853A1-20080110-C00027.png) 1974-05-18
JPS5244743Y2 (US20080005853A1-20080110-C00027.png) 1977-10-12

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