US3415235A - Spark ignition for otto engines - Google Patents

Spark ignition for otto engines Download PDF

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Publication number
US3415235A
US3415235A US553762A US55376266A US3415235A US 3415235 A US3415235 A US 3415235A US 553762 A US553762 A US 553762A US 55376266 A US55376266 A US 55376266A US 3415235 A US3415235 A US 3415235A
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US
United States
Prior art keywords
gear
spark ignition
ignition system
magneto
shaft
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
US553762A
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English (en)
Inventor
Hanke Friedrich
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.)
BWS Technologie GmbH
Original Assignee
Maschinenfabrik Buckau R Wolf AG
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 Maschinenfabrik Buckau R Wolf AG filed Critical Maschinenfabrik Buckau R Wolf AG
Application granted granted Critical
Publication of US3415235A publication Critical patent/US3415235A/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0068—Adaptations for other accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • 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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/06—Generator drives, e.g. having snap couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19358—Laterally slidable gears
    • Y10T74/19363—Rotary carriage

Definitions

  • ABSTRACT OF THE DISCLOSURE A transmission arrangement especially for transmitting rotation between an output shaft of an Otto engine and the' input shaft of the magneto of the spark ignition system of the engine, in which the output shaft is rotatably mounted about a fixed axis in a housing and wherein the input shaft is rotatably carried by an adaptor mounted on the housing adjustable between a plurality of different position in which the input shaft is located at different distances from the output shaft and in which the transmission arrangement includes a gear train having at least one gear which is replaceable by different gear to thereby change the ratio of the transmission when the adaptor is adjusted to change the distance between the shafts.
  • the present invention relates to internal combustion engines in general, and more particularly to improvements in operative connections between spark ignition systems and Otto engines. Still more particularly, the invention relates to a novel adapter which enables a spark ignition system, especially a magneto, to be utilized in Otto engines having different numbers of cylinders.
  • an Otto engine requires a spark ignition system which ignites the compressed fuel-air mixture in the cylinders and that the spark ignition system which includes a magneto must be coupled with the crankshaft of the engine to drive the distributor rotor of the magneto so that the rotor can direct the electrical impulses in proper order to the cylinders.
  • the spark ignition system which includes a magneto must be coupled with the crankshaft of the engine to drive the distributor rotor of the magneto so that the rotor can direct the electrical impulses in proper order to the cylinders.
  • it is considered necessary to produce a different magneto ignition system for each type of engine i.e., an ignition system used in an Otto engine with say four cyl inders cannot be used in an engine wherein the number of engines exceeds or is less than four.
  • Another object of the present invention is to provide a magneto ignition system which can be used in connec tion with Otto engines having different numbers of cylinders and which is constructed and assembled in such a way that its transfer from an engine with, say four cylinders into an engine with say six cylinders necessitates a minimum of work and can be completed within short periods of time.
  • a further object of the invention is to provide a novel adapter which may be utilized to connect a spark ignition system with Otto engines having a greater or lesser number of cylinders.
  • An additional object of the invention is to provide a novel gear train between the output shaft of an Otto engine and the rotary input member of a spark ignition system.
  • a concomitant object of the instant invention is to provide a very simple method of changing the transmission ratio between the crankshaft of an Otto engine and the distributor rotor of a magneto ignition system.
  • an Otto engine which comprises a housing (for example, a block which may be assembled of two or more units as outlined hereinbefore), a rotary output member mounted in the housing, a spark ignition system having a rotary input member which drives the distributor rotor, adapter means supporting the spark ignition system and detachably mounted on the housing for movement to a plurality of different positions in each of which the input member of the spark ignition system is located at a different distance from the output member, and transmission means including a gear train which transmits motion from the output member to the input member. At least one gear of the gear train is replaceable by one. or more different spare gears to thereby change the ratio of the transmission when the adapter means is adjusted to change the distance between the input member and the output member.
  • a housing for example, a block which may be assembled of two or more units as outlined hereinbefore
  • a spark ignition system having a rotary input member which drives the distributor rotor
  • adapter means supporting the spark ignition system and detachably mounted on the housing for movement to
  • the adapter means comprises a holder which can be attached to the housing in a plurality of angular positions and the input member is eccentric with referenec to the axis about which the holder is adjustable.
  • the exchangeable gear may be constituted by a pinion which is detachably secured to the input member, either directly or through the intermediary of a suitable flange or a like carrier.
  • FIG. 1 is a fragmentary section through the housing of an Otto engine and illustrates a spark ignition system in a first position
  • FIG. 2 is a view as seen from the line II--II of FIG. 1, two additional positions of the spark ignition system being indicated by phantom lines;
  • FIG. 3 is a section similar to that shown in FIG. 1 and illustrates a carrier for one gear of the transmission in two different positions.
  • FIG. 1 shows a housing 1 which forms part of an Otto engine having a .given number of cylinders.
  • the front wall 1a of this housing 1 is provided with a circular opening 2 which is closed by a disk-shaped holder or cover 3 forming part of an adapter and integrally or detachably connected with a supporting bracket 5 which carries a spark ignition system in the form of a magneto 4.
  • Cover 3 and bracket 5 form bracket means supporting the magneto 4.
  • the connecting means for detachably securing the cover 3 to the housing 1 comprises a set of screws 6 or similar fasteners which are disposed on a circle (see FIG. 2) and are equidistant from each other.
  • the stem of each screw 6 is driven into a tapped bore provided in the front wall 1a of the housing 1 adjacent to the opening 2.
  • the clutch 8 of the magneto 4 drives a distributor rotor 4a and receives motion from a rotary input shaft 7 which is journalled in a bearing sleeve 3b provided in a hub 3a of the cover or holder 3.
  • the hub 3a is eccentric with reference to the circle formed by the screws 6, i.e., with reference to the axis 3x of the cover 3.
  • the housing 1 defines an internal chamber 112 into which the shaft 7 extends, and this chamber 1b further accommodates a pair of coaxial spur gears 9, 10 forming part of a transmission and having different diameters.
  • the common axis of the gears 9, 10 and output shaft 10 is parallel to the axis of the shaft 7.
  • the gears 9, 10 are driven by the output shaft 1c.
  • the end portion 7a of the input shaft 7 extends beyond the hub 3a and detachably supports a hub 11 having a disk-shaped carrier or flange 11a for a spur gear 12 which meshes with the gear 10.
  • the connecting means for detachably securing the gear 12 to the flange 11a comprises a set of screws 13.
  • the operator In order to change the distance between the common axis of the gears 9, 10 and the axis of the driven input shaft 7, the operator must remove the screws 6 and change the angular position of the cover 3 with reference to the axis 3x. The operator then replaces the gear 12 with a gear of different diameter and reattaches the cover 3 to the front wall 1a but in a different angular position.
  • the input shaft 7 of the magneto 4 may be moved from a solid-line first position I to a second position II which is indicated by phantom lines.
  • the pitch circle of the gear 12 in the position I of the input shaft 7 is shown at 12'.
  • the shaft 7 In the position 11, the shaft 7 must carry a different gear having a larger pitch circle 12" so that such different gear will mesh with the gear 10 whose pitch circle is indicated by the numeral 10'. Such angular adjustment will take place when the operator wishes to reduce the transmission ratio between the output shaft 10 which drives the gears 9, 10 and the input shaft 7.
  • the input shaft 7 If the input shaft 7 is moved to the position 111 of FIG. 2, it must be provided with a smaller gear which can mesh with the gear 10, or with a gear having a pitch circle 12'" so that such gear can mesh with the gear 9 whose pitch circle is shown at 9'.
  • FIG. 3 illustrates that the position of the hub 11 may be reversed so that its flange 11a will be located nearer to or further away from the cover 3.
  • the flange 11a When the flange 11a is nearer to the cover, it can carry a gear having a pitch circle 12" and meshing with the gear 9.
  • the flange 11a When the position of the hub 11 is reversed, the flange 11a may carry the gear 12 or a gear having a pitch circle 12 and meshing with the gear 10.
  • the input shaft 7 can carry two gears each of which meshes with one of the gears 9, 10, that the chamber 1b may accommodate a single gear 9'or 10 or three or more gears.
  • the latter may be provided with holes or slots which receive the stems of screws 6 with at least some clearance so that the operator can change, within limits, the angular position of the cover 3 and the distance between the input shaft 7 and the common axis of gears 9, .10 before the screws 6 are drawn tight.
  • One such slot 3c of the cover 3 is shown in FIG. 2.
  • the magneto 4 may be placed at any desired distance from the gears that transmit to its input shaft motion from the output shaft of an Otto engine and that such changes in distance may be carried out by changing the angular position of the cover 3. While it in equally possible to change the transmission ratio between the output shaft 10 of the Otto engine and the input shaft 7 of the magneto 4 by providing the engine with one or more spare gears 9 and/or 10, the solution shown in FIGS. 1 to 3 has been found to be very satisfactory because a single set of gears suffices to allow for utilization of a single type of magneto in engines having different numbers of cylinders.
  • An important advantage of the hub 11 with flange 11a is that the cost involved in the production of gears 12 is reduced to a minimum. Also, the position of the hub 11 need not necessarily be reversed when the operator decides to drive the input shaft 7 from the gear 9 instead of from the gear 10, or vice versa. This will be readily understood since the gear 12 can be affixed to either side of the flange 1111.
  • stationary support means an output shaft mounted on said support means rotatably about a fixed axis; bracket means; a magneto mounted on said bracket means and having a magneto shaft parallel to said output shaft; means for adjustably mounting said bracket means on said support means between a plurality of different positions along an arcuate path in which said magneto shaft is located at different distances from said output shaft; and transmission means including a gear train for transmitting motion from said magneto shaft to said output shaft, said gear train including at least one gear replaceably mounted on one of said shafts so as to permit its replacement by a different gear to thereby change the ratio of transmission when the bracket means is adjusted between said different positions thereof.
  • bracket means is mounted on said support means adjustable about a predetermined axis parallel to said axes in a plurality of angularly displaced positions, and in which the axis of said magneto shaft is eccentrically arranged with respect to said predetermined axis.
  • said carrier is in form of a flange integral with said hub and said one gear is connectable to either side of said flange.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US553762A 1965-05-28 1966-05-31 Spark ignition for otto engines Expired - Lifetime US3415235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0065388 1965-05-28

Publications (1)

Publication Number Publication Date
US3415235A true US3415235A (en) 1968-12-10

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US553762A Expired - Lifetime US3415235A (en) 1965-05-28 1966-05-31 Spark ignition for otto engines

Country Status (5)

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US (1) US3415235A (de)
CH (1) CH432935A (de)
DE (1) DE1476315A1 (de)
GB (1) GB1072750A (de)
NL (1) NL6607436A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739817A (en) * 1970-04-22 1973-06-19 Rueti Ag Maschf Drive arrangement for the terry warps on a terry loom

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322480A (en) * 1997-02-19 1998-08-26 Johnson Electric Sa Adjustable mounting for motor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819622A (en) * 1956-07-02 1958-01-14 Haxton Andrew Speed reduction device
US3229540A (en) * 1963-09-13 1966-01-18 Gen Electric Gearing arrangements

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819622A (en) * 1956-07-02 1958-01-14 Haxton Andrew Speed reduction device
US3229540A (en) * 1963-09-13 1966-01-18 Gen Electric Gearing arrangements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739817A (en) * 1970-04-22 1973-06-19 Rueti Ag Maschf Drive arrangement for the terry warps on a terry loom

Also Published As

Publication number Publication date
DE1476315A1 (de) 1969-06-26
CH432935A (de) 1967-03-31
NL6607436A (de) 1966-11-29
GB1072750A (en) 1967-06-21

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