US3584165A - Ignition distributors with improved control weight adjustment means - Google Patents

Ignition distributors with improved control weight adjustment means Download PDF

Info

Publication number
US3584165A
US3584165A US823457A US3584165DA US3584165A US 3584165 A US3584165 A US 3584165A US 823457 A US823457 A US 823457A US 3584165D A US3584165D A US 3584165DA US 3584165 A US3584165 A US 3584165A
Authority
US
United States
Prior art keywords
housing
driven shaft
shaft
cam
control weight
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
US823457A
Other languages
English (en)
Inventor
William Lawrence Fry
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 US3584165A publication Critical patent/US3584165A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • F02P7/026—Distributors combined with other ignition devices, e.g. coils, fuel-injectors
    • F02P7/027—Distributors combined with other ignition devices, e.g. coils, fuel-injectors combined with centrifugal advance devices

Definitions

  • Scott Attorney-Holman and Stern ABSTRACT An ignition distributor structure wherein as the driven shaft is rotated, the housing and the cam shaft rotate therewith and the control weight pivots relative to the driven shaft, and in so doing coacts with the cam surface defined by the housing to move the housing and the cam shaft angularly relative to the driven shaft against the action of a resilient means which normally acts between the driven shaft and the housing to urge the housing to move angularly relative to the driven shaft in one direction.
  • SHEET 1 or 2 I VENTOE ATTOEN EYS IGNITION DISTRIBUTORS WITII IMPROVED CONTROL WEIGHT ADJUSTMENT MEANS This invention relates to ignition distributors for use with internal combustion engines.
  • An ignition distributor includes a shaft adapted to be rotatably driven by the engine with which the distributor is utilized, a synthetic resin housing carried by said driven shaft and mounted for angular movement relative to the driven shaft about the axis thereof, a cam shaft connected to said housing for rotation therewith and positioned coaxially with respect to said driven shaft, said cam shaft serving to operate a contact breaker assembly of the distributor, a control weight located within said housing and pivotally connected to said driven shaft for pivotal movement relative to the driven shaft about an axis substantially parallel with, and spaced from, the axis of the driven shaft, a cam surface defined by the housing and engageable by said control weight,
  • FIG. I is an exploded perspective view of part of an ignition distributor
  • FIG. 2 is a fragmentary part sectional view of an ignition distributor assembled.
  • the distributor includes a casing having a shaft 11 journaled for rotation therein.
  • the shaft 11 extends at one end from the casing and is adapted to engage a driving dog within the internal combustion engine with which the distributor is utilized, so that the shaft 11 is rotatably driven in timed relation to the operation of the en gine.
  • a driving plate 12 is secured to the shaft 11 at its inner end, a portion 13 of the shaft 11, of reduced cross section, ex-
  • a pair of pivot posts 14, 15 are secured to the plate 14, 15 extending parallel to the portion 13 of the shaft.
  • a moulded synthetic resin housing 16 comprising upper and lower disc like portions 17, 18 spaced apart by integral, diametrically opposite, cam forms 19, 21 is carried by the shaft 11, in contact with the plate 12.
  • the disc like portions 17, 18 of the housing 16 are each formed with a pair of diametrically opposed arcuate slots 17a, 17b, 18a, 18b respectively through which the posts 14, 15 extend, and moreover each of the portions 17, 18 is formed with a central hole through which the portion 13 of the shaft 11 extends.
  • a hollow cam shaft 22 is engaged as a sliding fit on the projecting part of the portion 13 of the shaft 11 and is connected to the housing 16 for rotation therewith by means of a pair of lugs (one of which is shown at 22a) at the lower axial end of the cam shaft 22, which engage corresponding holes 23 in the upper, disc like portion17 of the housing 16.
  • the cam shaft 22 is provided with an 'axially extending spigot 24 which receives the rotor arm of the distributor.
  • the cam shaft 22a operates the conventional contact breaker assembly of the distributor.
  • control weights 25, 26 Located within the housing 16 are a pair of control weights 25, 26, which are'pivotally mounted on the pivot posts 14, 15 respectively.
  • the control weights 25, 26 are freely movable within the housing 16 about the pivot posts 14, 15, and the housing is formed with pairs of inwardly directed ribs which lightly engage the control weights 25, 26 to resist movement of the control weights 25, 26 towards and away from the disc like portions 17, I8 of the housing 16.
  • the housing 16 is provided with a pair of diametrically opposed, upstanding posts 27, 28,
  • the post 28 including a portion 29, which extends from the lower disc like portion 18 of the housing 16 adjacent a stop 31 on the periphery of the drive plate 12.
  • a pair of springs 32, 33 are engaged with the post 27, and the projecting end of the post 14 and the post 28 and the projecting end of the post 15, respectively, the springs 32, 33 urging the housing 16, and the cam shaft 22, to move in one angular direction with respect to the plate 12 and the shaft 11.
  • the control weights 25, 26 engage respective cam surfaces defined by the cam forms 19, 21 within the housing 16, so that when the shaft 11 is driven the weights 25, 26 tend to pivot about their respective pivot posts 14, 15, and in so doing coact with the cam surfaces of the cam forms 19, 21 to move the housing 16, and the cam shaft '22, angularly with respect to the drive plate 12 and the shaft 11 against the action of the springs 32, 33, thereby altering the angular position of the cam shaft 22 with respect to the shaft 11 by an amount corresponding to the speed of rotation of the shaft 11.
  • the engagement of the portion 29 of the post 28 with the stop 31 in the drive plate 12 limits the degree of angular movement of the housing 16 and cam shaft 22 with respect to the shaft 11, in one direction, the degree of angular movement in the opposite direction being limited by interengagement of the weights 25, 26.
  • the limit of angular movement of the housing 16 in said one direction is set during assembly by cutting portions from the stop 31.
  • the housing 16 and the cam shaft 22 are held against upward, axial movement relative to the shaft 11 by means of a circlip 34 which is engaged in a circumferential groove 35 in the cam shaft 22, the ends of the circlip 34 extending through a radial bore 36 in the cam shaft 22 into a circumferential groove 37 in the portion 13 of the shaft 11.
  • control weights 25, 26 are conveniently formed from steel or sintered iron, and it will be appreciated that since the housing 16 and consequently the cam forms 19, 21 are moulded in synthetic resin, then any rattling of the parts which occurs due to free play in the parts will be deadened by the synthetic resin. Moreover, since the housing 16 is moulded in synthetic resin manufacturing tolerances can be kept to a minimum so that undesirable free play between the parts of the assembly is substantially eliminated.
  • the distributor shown in the drawings is operated by rotating the shaft 11, in a clockwise direction. However, the same housing 16 can be used in an anticlockwise distributor, the housing 16 being inverted.
  • the cam shaft 22 is formed in steel, but in a modification of the ignition distributor described above the cam shaft is moulded in a suitable synthetic resin material.
  • the stop 31 is dispensed with and angular movement of the cam shaft 22 in said one direction is limited by engagement of the portion 29 of the post 28, with one end of a slot in the plate 12.
  • An ignition distributor including a shaft adapted to be rotatably driven by the engine with which the distributor is utilized, a synthetic resin housing carried by said driven shaft and mounted for angular movement relative to the driven shaft about the axis thereof, a cam shaft connected to said housing for rotation therewith and positioned coaxially with respect to said driven shaft, said cam shaft serving to operate a contact breaker assembly of the distributor, a control weight located within said housing and pivotally connected to said driven shaft for pivotal movement relative to the driven shaft about an axis substantially parallel with, and spaced from, the axis of the driven shaft, a cam surface defined by the housing and engageable by said control weight, and resilient means acting between the driven shaft and the housing to urge the housing to move angularly relative to the driven shaft in one direction, the arrangement being such that as said driven shaft is rotated said housing and said cam shaft rotate therewith and said control weight pivots relative to said driven shaft and in so doing coacts with said cam surface defined by the housing to move the housing and the cam shaft angularly relative to said driven shaft

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)
  • Valve-Gear Or Valve Arrangements (AREA)
US823457A 1968-05-13 1969-05-09 Ignition distributors with improved control weight adjustment means Expired - Lifetime US3584165A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2252968 1968-05-13

Publications (1)

Publication Number Publication Date
US3584165A true US3584165A (en) 1971-06-08

Family

ID=10180857

Family Applications (1)

Application Number Title Priority Date Filing Date
US823457A Expired - Lifetime US3584165A (en) 1968-05-13 1969-05-09 Ignition distributors with improved control weight adjustment means

Country Status (4)

Country Link
US (1) US3584165A (enrdf_load_stackoverflow)
DE (1) DE1924055A1 (enrdf_load_stackoverflow)
FR (1) FR2008360A1 (enrdf_load_stackoverflow)
GB (1) GB1253040A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2301712A1 (de) * 1972-01-15 1973-07-19 Lucas Electrical Co Ltd Nockenanordnung fuer zuendverteiler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526157A (en) * 1983-03-30 1985-07-02 Theofanous Theos E Auto ignition conversion apparatus and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913543A (en) * 1957-05-07 1959-11-17 Gen Motors Corp Ignition device
US3399657A (en) * 1966-01-14 1968-09-03 Sev Marchal Combustion engine ignition
US3424875A (en) * 1967-04-28 1969-01-28 Ford Motor Co Distributor spark advance mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913543A (en) * 1957-05-07 1959-11-17 Gen Motors Corp Ignition device
US3399657A (en) * 1966-01-14 1968-09-03 Sev Marchal Combustion engine ignition
US3424875A (en) * 1967-04-28 1969-01-28 Ford Motor Co Distributor spark advance mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2301712A1 (de) * 1972-01-15 1973-07-19 Lucas Electrical Co Ltd Nockenanordnung fuer zuendverteiler

Also Published As

Publication number Publication date
FR2008360A1 (enrdf_load_stackoverflow) 1970-01-23
GB1253040A (enrdf_load_stackoverflow) 1971-11-10
DE1924055A1 (de) 1970-01-15

Similar Documents

Publication Publication Date Title
US4127098A (en) Starting device for an internal combustion engine, especially a chain saw engine
US3584165A (en) Ignition distributors with improved control weight adjustment means
US2511069A (en) Switch
US3202777A (en) Ignition distributor with friction preventive means in the advance mechanism
US3834184A (en) Centrifugal injection timing control device for fuel injection pumps in diesel engines
US2847524A (en) Magneto breaker mechanism
US3098366A (en) Ignition distributor
US2501431A (en) Multiple contact switch
US2489775A (en) Automatic spark advancing and retarding means for distributors
US4532444A (en) Rotational restriction lock for the rotor of a synchronous motor
GB1490767A (en) Indexing mechanism
US2598481A (en) Centrifugally operated motor speed governor
US3106620A (en) Cam actuated switch
US3424875A (en) Distributor spark advance mechanism
US3604864A (en) Point contact mounting for ignition distributors
US2319654A (en) Governor structure
US949994A (en) Means for preventing backward rotation of two-cycle engines.
US2604566A (en) Switching mechanism
US3776211A (en) Adjustable limit for the advance of an ignition distributor
US3883707A (en) Automotive distributor circuit breaker with eccentrically mounted, roller bearing type cam
US2246754A (en) Magneto
US1506666A (en) Timer for internal-combustion engines
US3626116A (en) Ignition distributors
US2715839A (en) Actuating mechanism for reciprocable element
US2696898A (en) Centrifugally engaged friction clutch