US3715528A - Centrifugal advance device for an ignition distributor - Google Patents

Centrifugal advance device for an ignition distributor Download PDF

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Publication number
US3715528A
US3715528A US156207A US3715528DA US3715528A US 3715528 A US3715528 A US 3715528A US 156207 A US156207 A US 156207A US 3715528D A US3715528D A US 3715528DA US 3715528 A US3715528 A US 3715528A
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United States
Prior art keywords
masses
main
plate
auxiliary
engine speed
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Expired - Lifetime
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US156207A
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English (en)
Inventor
R Habert
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Ducellier et Cie
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Ducellier et Cie
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    • 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
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
    • F02P5/06—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on engine speed

Definitions

  • ABSTRACT A centrifugal advance device for an ignition distributor for an internal combustion engine wherein there are provided two main flywheel masses and two auxiliary flywheel masses.
  • the main masses are each pivotable on a pin mounted on a plate which is connected to a drivable shaft and the auxiliary masses are coupled to the main masses. These masses are adapted on rotation of said shaft to displace a plate connected to a cam which is adapted to actuate a contactbreaker arm for obtaining a variation in the timing of the spark.
  • the invention relates to a centrifugal advance device for an ignition distributor of an internal combustion engine, the device being of the kind which comprises a centrifugal governor with weights which, when rotated by the control shaft of the distributor, angularly moves a plate rigidly connected with a cam for actuating the contact-breaker arm in order to obtain variations in the timing of ignition.
  • the most favorable operating conditions are only obtained if the variation of the timing of ignition (such variation depending on the number of'revolutions) does not take place in a linear manner, but is effected according to a stepped curve, i.e. in such a manner that there is, both in the lower region of the speed range as well as in the upper region, a variation which does depend on the engine speed, but that there is not, any such variation in the middle region of the speed range.
  • Variations of this type may be obtained, for example, by mechanisms which cause the variation in the lower region of the speed range to be initiated by one flywheel mass, namely a flywheel mass whose displace-- ment is opposed by only a weak spring, and the variation in the upper region of the speed range to be initiated by a second flywheel mass whose displacement is opposed by a more powerful spring, wherein in the central region of the speed range no variation can be produced because the centrifugal forces originating in this region are not capable of moving the second flywheel mass from its rest position.
  • devices are also known for producing variations in the form of a stepped curve with three stages of variation. It is also known, for example, as described in French Pat. application No. 7,018,758, filed May 22nd 1970, to add to the centrifugal governor, an intermediate platewhich is pivotally mounted on the control shaft and accompanies the plate connected integral with the cam in its angular displacement during the first stage of variation under the joint action of a support member and a spring subject to a certain initial tension.
  • the object of the present invention is to provide an improved form of centrifugal advance device which overcomes these problems.
  • the device comprises a shaft, a plate connected to said shaft, two main flywheel masses, each pivotable on a pin mounted on said plate connected to said shaft, and each arranged to act on the plate connected to the cam so as to to angularly to displace it, two auxiliary flywheel masses, coupled to the main flywheel masses, and spring means acting on said masses.
  • the auxiliary masses are arranged to drive said main masses in their angular displacement during the first stage of variation by exerting on them additional centrifugal forces, there.
  • Two abutments fixed to the plate connected to the control shaft. are provided and against which the auxiliary flywheel masses bear respectively at a moment corresponding to the end of said first stage of variation to prevent further.
  • FIG. 1 is a view in longitudinal section of one example of a centrifugal advance device in accordance with the invention
  • FIG. 2 is a plan view of the present invention in th stationaryposition
  • FIGS. 3, 4 and 5 are plan views of the device of FIG. 1 in three different positions of the cam plate corresponding respectively to the three stages of variation of the moment of sparking, and
  • FIG. 6 shows a curve of variation of the the timing of sparking in the form of a stepped curve which may be obtained by a device according to the present invention.
  • the centrifugal advance device shown in the drawings has a shaft 1 which is connected to a plate 2 supporting two pins 3 and 4 about which pivot two main flywheel masses 5 and 6.
  • a plate 7 connected to the cam 8 has two pins 9 and 10 which engage cam surfaces 1 l and 12 provided in the masses 5 and 6.
  • Two further or auxiliary flywheel masses 13 and 14 are coupled to the main flywheel masses 5 and 6 pivoting on the shafts 3 and 4.
  • the further masses l3 and 14 are formed with apertures 15 and 16 through which pass pins 17 and 18 connected to the masses Sand 6,
  • said further flywheel masses 13 and 14 turn in the direction of the arrows f and during this angular displacement drive the main flywheel masses 5 and 6 through the intermediary of the pins 17 and 18 which engage the ends 15a and 16a of the apertures 15 and 16 (FIG. 2).
  • the main flywheel masses 5 and 6 are then driven by the further flywheel masses 13 and 14 until said masses l3 and 14 contact the abutments 23 and 24 integral with the plate 2 and, by means of the cam surfaces 11 and 12 on which the pins 9 and 10 slide, force said cam plate 7 to rotate about the control shaft 1 by a certain angle proportional to the speed of rotation of the shaft, as determined by the profile of the cams ll, 12 and the tension of the springs 19 and 20, thus modifying the angle of advance of the spark in proportion to the speed of the engine.
  • the amplitude of movement of the plate 7 connected to the cam 8, relative to the plate 2 corresponds to the first stage of variation of the moment of sparking as il- I lustrated by the curve A in FIG. 6.
  • the pins 17 and 18 connected to the main flywheel masses and to which the springs 19 and 20 are hooked may be connected to the further or auxiliary flywheel masses, with pins extending through apertures provided in the main flywheel masses.
  • a centrifugal advance device for an ignition distributor of an internal combustion engine of the type including a centrifugal governor having rotatable masses which are adapted to angularly displace a plate connected to a cam, said cam being adapted to actuate a contact-breaker arm for obtaining a variation in the timing of the moment of sparking dependent upon engine speed, comprising a rotatable shaft, a plate connected to said shaft, two main flywheel masses, each main mass being pivotable on a pin mounted on said plate connected to said shaft and being operatively connected to said plate so as to angularly displace said plate when said main masses are pivoted on said pins, two auxiliary flywheel masses operatively coupled to said two main flywheel masses, spring means operatively connected between said masses and said plate, and further including two abutments fixed to said plate adjacent the paths of movement of said auxiliary masses, said auxiliary masses abutting said abutments upon moving a first predetermined angular distance jointly with said main masses, said abutments preventing further
  • each auxiliary mass is pivoted on the same pin as a main mass to which it is coupled, each auxiliary mass and the associated main mass being coupled together by a further pin which connected to one of said masses and extending through an aperture formed in the other mass coupled therewith, one end of a spring forming part of said spring means being hooked to one end of said further pin.
  • a centrifugal advance device comprising said main and auxiliary masses in conjunction with said spring means and said abutments act to vary the timing of the moment of sparking in three stages, the first and third stages being associated respectively with the lower and upper regions of the engine speed, the moment of sparking in said first and third stages being dependent upon the number of revolutions of said engine, the second stage of said curve being associated with an intermediate region of the engine speed, the timing of the moment of sparking remaining constant in the intermediate region of said curve.

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  • 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)
  • Valve Device For Special Equipments (AREA)
US156207A 1970-07-10 1971-06-24 Centrifugal advance device for an ignition distributor Expired - Lifetime US3715528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7025775A FR2097562A5 (xx) 1970-07-10 1970-07-10

Publications (1)

Publication Number Publication Date
US3715528A true US3715528A (en) 1973-02-06

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ID=9058604

Family Applications (1)

Application Number Title Priority Date Filing Date
US156207A Expired - Lifetime US3715528A (en) 1970-07-10 1971-06-24 Centrifugal advance device for an ignition distributor

Country Status (7)

Country Link
US (1) US3715528A (xx)
BE (1) BE767764A (xx)
DE (1) DE2132969A1 (xx)
ES (1) ES392970A1 (xx)
FR (1) FR2097562A5 (xx)
GB (1) GB1342255A (xx)
NL (1) NL7109485A (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942492A (en) * 1974-02-15 1976-03-09 Hitachi, Ltd. Centrifugal ignition advancer device for an ignition system of an internal combustion engine
US3964456A (en) * 1974-12-24 1976-06-22 Colt Industries Operating Corporation Ignition distributor
US4030467A (en) * 1974-08-16 1977-06-21 Bayerische Motoren Werke Aktiengesellschaft Centrifugal adjusting mechanism for ignition interrupters of internal combustion engines
US4183230A (en) * 1977-08-10 1980-01-15 Nippondenso Co., Ltd. Centrifugal governor for engine ignition system
US4363297A (en) * 1978-02-03 1982-12-14 Honda Giken Kogyo Kabushiki Kaisha Ignition timing control device for internal combustion engine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008647A (en) * 1932-05-07 1935-07-16 Electric Auto Lite Co Timer and distributor mechanism
US2219480A (en) * 1937-07-22 1940-10-29 Gen Motors Corp Centrifugal control for ignition timer
US2238649A (en) * 1939-04-04 1941-04-15 Reconstruction Finance Corp Drive connection
US2533755A (en) * 1945-04-12 1950-12-12 Bendix Aviat Corp Speed controlled coupling
US3062929A (en) * 1959-08-31 1962-11-06 Holley Carburetor Co Ignition distributor advance mechanism
US3139081A (en) * 1962-06-22 1964-06-30 Motorola Inc Distributor advance mechanism
US3202777A (en) * 1961-10-04 1965-08-24 Holley Carburetor Co Ignition distributor with friction preventive means in the advance mechanism
US3371169A (en) * 1965-08-17 1968-02-27 Nippon Denso Company Ltd Ignition distributor for internal combustion engines of the type in which spark advance is dependent
US3430459A (en) * 1967-12-21 1969-03-04 Raymond Roger Hill Adjustable advance limiter for ignition systems
US3482559A (en) * 1967-02-08 1969-12-09 Ducellier & Cie Ignition distributor for internal combustion engines

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008647A (en) * 1932-05-07 1935-07-16 Electric Auto Lite Co Timer and distributor mechanism
US2219480A (en) * 1937-07-22 1940-10-29 Gen Motors Corp Centrifugal control for ignition timer
US2238649A (en) * 1939-04-04 1941-04-15 Reconstruction Finance Corp Drive connection
US2533755A (en) * 1945-04-12 1950-12-12 Bendix Aviat Corp Speed controlled coupling
US3062929A (en) * 1959-08-31 1962-11-06 Holley Carburetor Co Ignition distributor advance mechanism
US3202777A (en) * 1961-10-04 1965-08-24 Holley Carburetor Co Ignition distributor with friction preventive means in the advance mechanism
US3139081A (en) * 1962-06-22 1964-06-30 Motorola Inc Distributor advance mechanism
US3371169A (en) * 1965-08-17 1968-02-27 Nippon Denso Company Ltd Ignition distributor for internal combustion engines of the type in which spark advance is dependent
US3482559A (en) * 1967-02-08 1969-12-09 Ducellier & Cie Ignition distributor for internal combustion engines
US3430459A (en) * 1967-12-21 1969-03-04 Raymond Roger Hill Adjustable advance limiter for ignition systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942492A (en) * 1974-02-15 1976-03-09 Hitachi, Ltd. Centrifugal ignition advancer device for an ignition system of an internal combustion engine
US4030467A (en) * 1974-08-16 1977-06-21 Bayerische Motoren Werke Aktiengesellschaft Centrifugal adjusting mechanism for ignition interrupters of internal combustion engines
US3964456A (en) * 1974-12-24 1976-06-22 Colt Industries Operating Corporation Ignition distributor
US4183230A (en) * 1977-08-10 1980-01-15 Nippondenso Co., Ltd. Centrifugal governor for engine ignition system
US4363297A (en) * 1978-02-03 1982-12-14 Honda Giken Kogyo Kabushiki Kaisha Ignition timing control device for internal combustion engine

Also Published As

Publication number Publication date
NL7109485A (xx) 1972-01-12
BE767764A (fr) 1971-10-18
ES392970A1 (es) 1973-11-01
GB1342255A (en) 1974-01-03
FR2097562A5 (xx) 1972-03-03
DE2132969A1 (de) 1972-01-20

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