US3753429A - Internal combustion engine ignition system - Google Patents

Internal combustion engine ignition system Download PDF

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Publication number
US3753429A
US3753429A US00161766A US3753429DA US3753429A US 3753429 A US3753429 A US 3753429A US 00161766 A US00161766 A US 00161766A US 3753429D A US3753429D A US 3753429DA US 3753429 A US3753429 A US 3753429A
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arrangement
winding
legs
magnet
magnets
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US00161766A
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English (en)
Inventor
G Imhof
P Schmaldienst
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority claimed from DE19702037336 external-priority patent/DE2037336C3/de
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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
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • F02P1/08—Layout of circuits
    • F02P1/086—Layout of circuits for generating sparks by discharging a capacitor into a coil circuit
    • 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
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/0677—Mechanical arrangements

Definitions

  • ABSTRACT A plurality of permanent magnets forming a cylinder is rotated about a common axis, inducing voltages in two windings on respective legs of a magnet yoke positioned within the cylinder, the windings being so wound that their voltage normally cancel. Means are provided within the cylinder so as to upset, once every rotation of the plurality of magnets, the balance between the voltages in the two windings so that there is produced a control voltage that is conducted to the control electrode of a thyristor that controls the discharging of an ignition capacitor through the primary of a spark coil.
  • the cross piece connecting together the two legs is nonmagnetic, and means are provided for preventing the generation of a control voltage when the engine rotates in the wrong direction.
  • the invention relates to an electronic ignition system for an internal combustion engine, the sparking of the one or more spark plugs being controlled by a control voltage that is induced in a control winding carried by a magnet yoke and conducted to the control electrode of an electronic switch, such as a thyristor.
  • a rotatable magnetic system which comprises a plurality of magnets that, with respect to the axis of rotation, are radially polarized and are mounted on a hollow, cylindrical, short circuiting part. These magnets are spaced apart in the direction of the circumference of the cylindrical short circuiting part. The polarity of these magnets alternates, there being an alternating current winding carried by an iron core, in which winding an alternating current is induced when the magnets rotate.
  • Two lines each drawn from the axis of rotation through the center of a respective end face of the core, lie along different radiiof the cylindrical short circuiting part, which latter is part of a cup-shaped body of rotation, which has an inwardly extending connecting hub.
  • Internal cobustion engines that are provided with an ignition system of this kind are usually intended for modern light motorcycles, the current being provided by a flywheel magneto or by a flywheel generator magneto so as to avoid the necessity of having a battery.
  • the aforesaid alternating current winding can be used, for example, to charge the ignition capacitor, which, by triggering the aforesaid electronic switch, can be discharged through the primary winding of a spark coil, the sparkplug being connected across the secondary winding of this coil.
  • To power the lamps and the horn there is usually provided a second alternating current winding carried by another iron core. The same magnetic system induces an alternating current in the second winding.
  • the magnetic system In order to obtain an alternating current voltage of sufficiently high frequency, the magnetic system must have as many magnets as possible. If these same magnets would be used to induce the control voltage in the aforesaid control winding, the control voltage would cause too many ignitions and at times that would damage the engine, since in most cases only a single ignition is required for each complete rotation of the magnetic system.
  • An object of the invention is an electronic ignition system for an internal combustion engine that avoids a special magnet for obtaining the ignition control voltage.
  • the invention consists of a magnetic system, the magnetic system including a plurality of permanent magnets spaced about a common axis and defining a cylinder, means for mounting this plurality of magnets free to be driven in rotation by the engine about the common axis, an electronic switch, such as a thyristor, for permitting when conductive the production of an ignition causing spark, a stationary magnet yoke located within the cylinder, this yoke including two spaced legs that extend radially within the cylinder, a contro winding located within the cylinder and connected to the switch for generating a control voltage to control the conductivity of the switch, the control winding having first and second winding sections to have induced therein voltage components when the plurality of magnets rotates, each leg carrying a respective one of the first and second winding sections, the first and second winding sections being so connected together that normally the voltage components are at least sufficiently balanced out so as to prevent the generation of the control voltage for the switch, and means comprised by the magnetic system for at least sufficiently nucle
  • FIG. 1 is a side view, partly cut away, of the ignition system and of the magnetic system of the invention
  • FIGS. 2 and 3 are side views showing, in a simplified form, two different embodiments of the magnetic circuit
  • FIGS. 4, 5, and 6 are top views showing three different variations of the embodiment shown in FIG. 3;-
  • FIG. 7 is a side view showing a still further variation of the embodiment shown in FIG. 3;
  • FIG. 8 is a view taken along line 8-8 of FIG. 7;
  • FIG. 9 is a side view showing another form of the magnetic circuit
  • FIGS. 10, 11 and 12 are front views of the magnet M3 of three different variations of the embodiment shown in FIG. 9;
  • FIGS. 13 and 14 are side views of two different embodiments of the yoke for carrying the control winding
  • FIG. 15 is a side view of a yoke having a nonmagnetiferous cross piece
  • FIGS. 16, 17 and 18 are side views of the magnetic circuit shown in FIG. 1, for preventing rotation of the engine in the wrong direction.
  • the ignition system illustrated which is intended for an internal combustion engine, not shown, comprises an ignition capacitor 11 of which one plate is connected to the ground rail 12 and the other plate is connected to the cathode of a rectifier 13.
  • the anode of the rectifier 13 is connected to one terminal 14 of an alternating current winding 15, which serves as the charging winding, the other terminal 16 of this winding being connected to the ground rail 12.
  • the ungrounded plate of the ignition capacitor 11 is also connected by the primary winding 17 of a spark coil 18 to the output electrode 19 of a thyristor that operates as an electronic switch 20, the reference electrode 21 and the control electrode 22 of the thyristor respectively being connected to the ground rail 12 and to the cathode of a control diode 23.
  • the anode of the control diode 23 is connected to the control terminal 24 of a control winding 25, the reference terminal 26 of which is connected to the grounded rail 12.
  • the spark coil 18 also includes a secondary winding 27 across which is connected the spark plug 28, one end of the secondary being connected to the grounded rail 12.
  • the alternating current winding is mounted on an iron core 29, and is located along a chord of a circular path along which move the magnets M of a magnetic system M, the magnets being moved in the direction of the arrow P by the internal combustion engine.
  • Each of the magnets M (three being shown, although there are four in this particular embodiment) is in the form of a shell, the outer faces of which are fixed to the inner wall of a hollow, cylindrical, magnetic short circuiting part 30.
  • This part is a component of a cup-shaped body of revolution K, which is made of a magnetiferous material and incorporates a central, downwardly projecting, hub 31.
  • the hub 31 incorporates a central bore 32, which accepts a shaft 33 that is rotated by the internal combusion engine. Housing with its hub 32 and the shaft 33 constitute rotary support means for the permanent magnets.
  • the magnets M are radially polarized, as shown in FIG. 1, the north and south poles being designated by the respective reference letters N and S.
  • the magnets M are spaced from one another a distance Z in the direction of rotation, the active" poles (those poles nearest to the ends 34 and 35 of the core 29) of successive magnets being of alternating polarity as they are moved by the end faces 34 and 35.
  • the angle a defined between the radii r1 and r2, which begin at the axis of rotation O and pass through the centers a1 and a2 of these end faces, is so chosen that when a N pole passes by the end face 34 an S pole passes by the end face 35, or the reverse is true, or else when a spacing Z passes by the face 34 another spacing Z passes by the face 35.
  • the alternating current winding 15. and the iron core 29 therefor are mounted on a stationary support means, here in the form of a ciruclar plate 36, which is rigidly fixed to the internal combustion engine, and which incorporates a central opening 37 for the hub 31 and the shaft 33.
  • a yoke H which carries the control winding 25.
  • the yoke H which is located between the hub 31 and the magnets M, has two legs 38 and 39 that extend in the same radial direction and are spaced apart in the direction of the axis 0, each leg carrying a respective winding section 25' and 25" of the control winding 25. These two legs are at least approximately bar-shaped members. These two winding sections are connected together so as to balance out the voltage components that are induced in them when the magnets M are rotated. To obtain the control voltage for triggering the switch 20, the balance between these voltage components is nullified by changing the magnetic flux, the resulting voltage being used as the control voltage.
  • This change in the magnetic flux is obtained, in the embodiment shown in FIGS. 1 and 2, by two neighboring magnets M1 and M2 of the magnets M.
  • the magnets M1 and M2 have each a respective tongue-like extension 40 and 41 of a respective S and N pole, these extensions projecting into the common space 2 between these two magnets.
  • Both extensions 40 and 41 are spaced in the axial direction, just as are the legs 38 and 39; and in a predetermined rotational position of the magnets M1 they are aligned with, or cover, respective ones of the end faces 42 and 43 of the legs 38 and 39, which face the magnets M.
  • the radially polarized magnets constitute first permanent magnet means in this embodiment
  • the tongue-like extensions 40, 41 together with the respective adjoining portions of magnets MI' and M2 constitute second permanent magnet means in this embodiment.
  • each of the active poles of the magnets M is covered with a magnetiferous plate L, the respective plates L1 and L2 for the magnets M1' and M2 having each a respective tongue 44 and 45, which extends at least approximately concentrically with the part 30.
  • These tongues constitute, in a very simple manner, the extensions 40 and 41.
  • the bar-shaped legs 38 and 39 of the yoke H are magnetically connected together by a cross piece 46.
  • the cross piece which extends parallel to the axis 0, connects together those two ends of the legs 38 and 39 that are nearest to the hub 31.
  • the one winding end 47 of the winding section 25 forms the control connection 24, and the one winding end 48 of the other winding section 25" forms the reference connection 26.
  • the two winding sections looking towards the hub 31, are wound in the same direction.
  • the number of turns of each winding section is such that the voltage components induced in the two winding sections are at least approximately equal when the magnets M without the extensions 40 and 41 move by.
  • the ends 49 and 50 of the winding sections 25 and 25" are connected together.
  • a capacitor C is connected between the control connection 24 and the reference connection 26 to short circuit high frequency interference voltages.
  • the extensions 40 and 41 and the plates L are omitted.
  • the desired change in flux is obtained by a projection 51 on the hub 31.
  • the projection is turned by one of the end faces 42 or 43 of the legs 38 and 39 in the present embodiment the face 43-, the projection 51, the hub, and the body K all being of a magnetiferous material.
  • the projection 51 is positioned on the hub so that it is located radially oppositeone of the magnets M.
  • the cross piece 46 and the corresponding ends 38 and 39' of the legs 38 and 39 are spaced away from the hub 31.
  • the projection 51 is a stud, of which, when it is opposite the end face 43, the cross section is located at least approximately in the position of the cross section of the leg 39.
  • the leading edge of the control voltage has a favorable shape if, as shown in FIG. 5, the projection 51, in
  • a stepped ignition advance is obtained with the variation shown in FIG. 6, in which a magnetiferous projection 52, which has a smaller effect on the amount of flux that passes through the leg 39 than the projection 51, is provided on the hub 31 so as to precede the pin 51 in the direction of rotation.
  • the desired smaller magnetic efiect can be obtained by making the projection 52 of a material having a higher reluctance than the material of the projection 51, or the projection 52 can have a smaller cross section than the projection 51, or the projection52 can be spaced farther from the leg 39 than is the projection 51. In the example illustrated in FIG. 6, the projection 52 is spaced farther from the leg 39 than is the projection 51.
  • the hub 31 can be provided, as shown in FIGS. 7 and 8, with at least one recess 53, instead of the projection 51 or the projections 51 and 52, the recess being so located in the hub that it moves past either end face 42 or 43 of the respective leg 38 or 39.
  • the recess is located in the hub so as to be moved past the end face 43 of the leg 39, the recess extending at right angles to the longitudinal direction of the hub 31.
  • the recess can converge.
  • the recess 53 can be preceded in the direction of rotation by a recess having a smaller dimension than the recess 53, such as a smaller depth.
  • FIG. 9 shows still another embodiment for obtaining the desired change in flux.
  • a magnet M3 of the magnets M' incorporates a notch 54, which moves past either the end face 42 or 43 of the respective leg 38 or 39 in the direction of rotation P.
  • the notch is provided in the magnet M3 in the upper edge 55 thereof, which extends transversely to the axis 0.
  • the notch 54 extends at right angles from the edge 55.
  • the leading edge of the control voltage has a favorable shape if, as shown in FIG. 11, the depth of the notch decreases in the direction of rotation.
  • a stepped ignition advance is obtained with the variation shown in FIG. 12, in which the notch 54 is preceded, in the direction of rotation, by a smaller notch 56.
  • the extension piece is preferably located in approximately the center of the cross piece and has a cross section that is at least approximately equal to that of the cross piece 46.
  • the extension piece extends in the direction opposite that of the legs 38 and 39.
  • the extension piece as shown in FIG. 14, can be provided with a magnetiferous transverse piece 58, which is positioned at least approximately in the projection of the cross piece
  • the magnetiferous cross piece 46 of the yoke H can be omitted, so that, as illustrated in FIG.
  • the yoke legs 38 and 39 are not magnetically coupled together. It is advisable, however, so as to fix the legs 38 and 39 in position, to connect the legs together by a non-magnetic cross piece 59. If a yoke of this kind is used with the embodiment shown in FIG. 1, it is possible in several different ways to prevent the internal combustion engine from turning over in the wrong direction.
  • the winding section 25 which, when the engine turns in the wrong direction, produces a control voltage for the electronic switch 20 that normally would result in an ignition causing spark, is shunted by a diode 60,which is conductive when this control voltage appears. It is advisable, in order to ensure electrical symmetry, that the winding section 25 should be shunted by a diode 61 that is non-conductive when this generates a control voltage, because the engine is tuming in the right direction.
  • FIG. 17 A second embodiment for preventing the engine from operating in the wrong direction P is shown in FIG. 17.
  • the leg 39 which carries the winding section 25"
  • also carries an auxiliary winding 62 which is connected in series with a diode 63 that conducts the current induced in the winding 25' when the engine turns in the wrong direction P and there is induced in the winding 25" a control voltage.
  • the auxiliary winding is wound in the opposite direction and is connected between the control terminal 24 and the reference terminal 26, the voltage induced in the auxiliary winding being sufficient to balance the control voltage induced in the winding section 25". For reasons.
  • auxiliary winding 62 in series with a secondauxiliary winding 64, which is on the other leg 38.
  • the second auxiliary winding 64 is connected between the control terminal 24 and the reference terminal 26 and is wound in the same direction as the winding section 25.
  • FIG. 18 shows the third embodiment for preventing rotation of the engine in the wrong direction.
  • a diode 65 forms, through the winding section 25', a series connection between the control terminal 24 and the reference terminal 26, the cathode of the diode 65 being connected to the end 49 of the winding section 25'.
  • a second diode 66 forms a series connection, through the winding 25", between the reference terminal 26 and the control terminal 24, the cathode of this diode being connected to the end of the winding 25".
  • the ignition system is intended for a single cylinder internal combustion engine, so that, if the magnetic system rotates at the same speed as does the engine, there will be one ignition for each complete rotation of the magnetic system. This is ensured, because during one complete rotation of the magnetic system the extensions 40 and 41 are rotated past the yoke I! only once. From the voltage components that consequently are induced in the winding sections 25 and 25" there is obtained one complete cycle of alternating current voltage, that half wave thereof that is conducted by the diode 23 to the control electrode 22 of the switch triggering the latter.
  • the ignition capacitor 11 can now discharge through the primary winding 17 of the spark coil 18, so as to induce in the secondary winding 27 a high voltage spike that produces a spark in the gap of the spark plug 28, which spark ignites the compressed fuel-air mixture in the cylinder of the engine.
  • the control voltage has a less steep leading edge, so that the ignition timing is adjustable over a widened range.
  • the leading edge of the control voltage is less steep, so that the ignition timing s adjustable over a widened range.
  • the notch 56 also causes the generation of a control voltage, when this notch passes by the end face 43.
  • the peak amplitude of the complete cycle of alternating voltage caused by this notch is too small to trigger the switch 20, the switch being triggered only when the notch 54 passes by the face 43.
  • the ignition timing is suddenly advanced, becuase the amplitude of the control voltage caused by the notch 56 is now sufficient to trigger the switch 20.
  • the flux density varies as a magnet MI passes from the neighborhood of the end faces 42 and 43 and is followed, after the spacing Z, by the next magnet M1. If the aforesaid spacing 2 has no extensions 40 and 41, the flux density change occurs in the legs 38 and 39, the hub 31, the bottom of the body K, and the short circuiting part 30. Since the flux density changes in both of the yoke legs 38 and 39, voltage components are induced in the winding sections 25' and 25" that balance each other out.
  • the active S pole with the extension 40 leaves the neighborhood of the end face 43 and is followed by the active N pole of the magnet M2, the flux conducted through the hub 31, the bottom of the body K, and the short circuiting part 30 changes in the leg 39.
  • the voltage consequently induced in the winding section 25 is blocked by the diode 23, so that the voltage generated cannot trigger the switch 20. While this is occurring, either the active N pole or the extension 41 of the magnet M2 is opposite the end face 42 of the leg 38. This prevents any compensation of the voltage half wave that is induced in the winding section 25", because the magnet flux in the leg 38 remains unchanged, and consequently no voltage can be induced in the winding section 25'.
  • the voltage induced in the winding section 25" that ordinarily causes ignition when the engine turns in the wrong direction is opposed by the voltage half wave that is induced in the auxiliary winding 62 and is conducted by the diode 63. in this embodiment, as in the previous one, no ignition can occur if the engine turns in the wrong direction.
  • the diodes 65 and 66 and their connection to the winding sections 25' and 25" ensure that when the engine turns in the correct direction the control voltage induced in the winding section 25' is conducted by the diode 65 as well as by the diode 23, but that when the engine turns in the wrong direction the voltage halt wave induced in the winding section 25' which would otherwise trigger the switch 20, is blocked by the diode 66, which is connected in series with the winding section 25".
  • An electronic ignition arrangement for an internal combustion engine comprising in combination an ignition capacitor; a transformer having a primary winding and a secondary winding; a spark plug connected across said secondary winding; an electronic switch having a control input and connected to said capacitor and to said primary winding to form with the latter a discharge path for said ignition capacitor; stationary support means; rotary support means mounted in proximity to said stationary support means for rotation about an axis of rotation; a charging winding mounted on said stationary support means and connected to said ignition capacitor for charging the latter; a yoke arrangement including two spaced legs of ferromagnetic material mounted on said stationary support means; a pair of windings each wound around a respective one of said legs and connected together to form a control winding connected across said control input for controlling the conductivity of said switch; first permanent magnet means on said rotary support means having a first field distribution and operative upon rotation of said rotary support means both for producing flux changes through said charging winding resulting in the flow of charging current into saidcapacitor and also for producing flux changes through said pair of
  • said yoke arrangement includes a magnetiferous cross piece physically connecting together said two legs at corresponding ends thereof, said cross piece extending at least approximately parallel to said axis.
  • said yoke arrangement includes a non-magnetiferous cross piece physically connecting together said two legs so that a control voltage is generated across one of said pair of windings when the engine turns in the correct direction.
  • said rotary support means includes a hub coaxialwith said axis, said hub rotating about said axis with said plurality of magnets, and further wherein said second magnet means includes at least a first magnetiferous projection on said hub for magnetically cooperating with one of said two legs of said yoke arrangement so as to vary, once during each complete rotation of said plurality of permanent magnets, the magnetic flux in said one leg while the magnetic flux in the other said leg is at least approximately unchanging.
  • said rotary support means includes a hub coaxial with said axis, said hub rotatating about said axis with said plurality of magnets, and further wherein said second magnet means includes at least a first recess in said hub for magnetically cooperating with one of said two legs of said yoke arrangement so as to vary, once during each complete rotation of said plurality of permanent magnets, the magnetic flux in said one leg while the magnetic flux in the other said leg is at least approximately unchanging.
  • said second magnet means includes at least a first magnet, said first magnet being one of said plurality of permanent magnets, said first magnet incorporating at least a first notch for magnetically cooperating with one of said two legs of said yoke arrangement so as to vary, once during each complete rotation of said plurality of permanent magnets, the magnetic flux in said one leg while the magnetic flux in the other said leg is at least approximately unchanging.
  • first control winding section is a control connection and one end of the second control winding section is a reference connection, said first and second winding sections being wound in the same direction as seen either from said control connection or said reference connection and looking towards said common axis, the number of turns of said first and second winding sections being such that said opposing voltages are at least approximately equal.
  • each magnet of said plurality of permanent magnets is polarized along a radius of said cylinder, successive magnets of said plurality of permanent magnets having alternating polarity.
  • said second permanent magnet means includes first and second neighboring permanent magnets, said plurality of permanent magnets including said first and second neighboring magnets, said first permanent magnet including an extension of one pole, said one pole being positioned nearer to said two legs when said first magnet is moved past said yoke arrangement than the other pole of said first magnet, said second permanent magnet including an extension of theother pole, said other pole being the opposite of said one pole and being positioned nearer to said two legs when said second magnet is moved past said yoke arrangement than the opposite pole of said second magnet, the two extensions projecting in circumferentially opposed directions into the common space between said first and second magnets, said two extensions being spaced apart, in a direction parallel to said axis, an amount equal to the spacing between said two legs so that in a predetermined rotational position of said plurality of permanent magnets each said extension is aligned with the end of a respective leg of said yoke arrangement.
  • said rotary support means includes a magnetiferous hollow cylindrical housing, said plurality of permanent magnets being mounted within said housing in physical contact within the surface thereof, said'housing including a central hub for accepting a driven shaft to rotate said housing, said hub being coaxial with said axis, and further wherein said yoke arrangement includes a magnetiferous cross piece physically connecting together said two legs at corresponding ends thereof, said cross piece extending at least approximately parallel to said axis, said cross piece being positioned directly opposite said hub.
  • said yoke arrangement includes a non-magnetiferous cross piece physically connecting together said two legs so that a control voltage is generated across one of the two control winding sections when the engine turns in the correct direction, further wherein one end of the first winding section is a control connection and one end of the second winding section is a reference connection, said first and second winding sections being wound in the same direction as seen either from said control connection or from said reference connection and looking toward said axis, the number of turns of said first and second winding sections being such that said opposing voltages are at least approximately equal, the other end of said first winding section and the other end of said second winding section being connected together, and further wherein a first diode is shunted across the other of said first and second winding sections across which said control voltage is generated when the engine turns in the wrong direction, said first diode being connected so as to short circuit said other of said first and second windings when the engine turns in the wrong direction, whereby no control voltage is generated and the engine is
  • said yoke arrangement includes a non-magnetiferous cross piece physically connecting together said two legs so that a control voltage is generated across one of the two control winding sections when the engine turns in the correct direction, further wherein one end of the first winding section is a control connection and one end of the second winding section is a reference connection, said first and second winding sections being wound in the same direction as seen either from said control connection or from said reference connection and looking toward said axis, the number of turns of said first and second winding sections being such that said opposing voltages are at least approximately equal, the other end of said first winding section and the other end of said second winding section being connected together, and further including a first auxiliary winding on that one of said legs that carries the other of said first and second winding sections across which said control voltage is generated when the engine turns in the wrong direction, said first auxiliary winding connected between said control connection and said reference connection, a diode connected in series with said first auxiliary winding so as to conduct when the engine
  • said yoke arrangement includes a non-magnetiferous cross piece physically connecting together said two legs so that a control voltage is generated across one of the two control winding sections when the engine turns in the correct direction, and further wherein one end of the first winding section is a control connection and one end of the second winding section is a reference connection, said first and second winding sections being wound in the same direction as seen either from said control connection or from said reference connection and looking toward said common axis, the number of turns of said first and second winding sections being such that said opposing voltages are at least approximately equal, and further including a first diode connected in series between the other end of said first winding section and said reference connection; a second diode connected in series between the other end of said second winding section and said control connection, the anode of said first diode being connected to said reference connection and the anode of said second diode being connected to said control connection.
  • said yoke arrangement includes a magnetiferous cross piece physically connecting together said two legs at corresponding ends thereof, said cross piece extending at least approximately parallel to said axis, said corresponding ends of said two legs being spaced farther from said hub than the opposite ends of said two legs.
  • said arrangement yoke includes a magnetiferous cross piece physically connecting together sadi two legs at corresponding ends thereof, said cross piece extending at least approximately parallel to said axis, said corresponding ends of said two legs being spaced farther from said hub than the opposite ends of said two legs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
US00161766A 1970-07-28 1971-07-12 Internal combustion engine ignition system Expired - Lifetime US3753429A (en)

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DE19702037336 DE2037336C3 (de) 1970-07-28 Zündanlage für eine Brennkraftmaschine

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US3753429A true US3753429A (en) 1973-08-21

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US00161766A Expired - Lifetime US3753429A (en) 1970-07-28 1971-07-12 Internal combustion engine ignition system

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JP (1) JPS531442B1 (enrdf_load_stackoverflow)
AT (1) AT312999B (enrdf_load_stackoverflow)
CA (1) CA937631A (enrdf_load_stackoverflow)
CH (1) CH526045A (enrdf_load_stackoverflow)
ES (1) ES393689A1 (enrdf_load_stackoverflow)
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US3861373A (en) * 1973-03-23 1975-01-21 Bosch Gmbh Robert Magneto ignition system for internal combustion engines
EP0004416A3 (en) * 1978-03-18 1979-10-31 LUCAS INDUSTRIES public limited company Crankshaft position transducer system
EP0269117A1 (en) * 1986-11-26 1988-06-01 Chengdu Aircraft Corporation Continuous spark electronic igniter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3924843A1 (de) * 1989-07-27 1991-02-07 Prufrex Elektro App Verfahren und anordnung mit induktivem drehgeber zur steuerung, insbesondere des zuendzeitpunkts von brennkraftmaschinen

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US3517655A (en) * 1967-06-14 1970-06-30 Motobecane Ateliers Capacity-discharge electronic ignition apparatus for internal combustion engines
US3598098A (en) * 1968-05-02 1971-08-10 Bosch Gmbh Robert Ignition arrangment for internal combustion engines
US3599615A (en) * 1969-05-29 1971-08-17 Motorola Inc Spark advance mechanism for solid state ignition systems
US3623467A (en) * 1969-11-24 1971-11-30 Phelon Co Inc Triggering magnet and coil assembly for use with an ignition system including a permanent magnet alternator
US3630185A (en) * 1969-02-13 1971-12-28 Bosch Gmbh Robert Ignition-timing apparatus
US3646667A (en) * 1967-11-17 1972-03-07 Tecumseh Products Co Ignition circuit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517655A (en) * 1967-06-14 1970-06-30 Motobecane Ateliers Capacity-discharge electronic ignition apparatus for internal combustion engines
US3646667A (en) * 1967-11-17 1972-03-07 Tecumseh Products Co Ignition circuit
US3598098A (en) * 1968-05-02 1971-08-10 Bosch Gmbh Robert Ignition arrangment for internal combustion engines
US3630185A (en) * 1969-02-13 1971-12-28 Bosch Gmbh Robert Ignition-timing apparatus
US3599615A (en) * 1969-05-29 1971-08-17 Motorola Inc Spark advance mechanism for solid state ignition systems
US3623467A (en) * 1969-11-24 1971-11-30 Phelon Co Inc Triggering magnet and coil assembly for use with an ignition system including a permanent magnet alternator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861373A (en) * 1973-03-23 1975-01-21 Bosch Gmbh Robert Magneto ignition system for internal combustion engines
EP0004416A3 (en) * 1978-03-18 1979-10-31 LUCAS INDUSTRIES public limited company Crankshaft position transducer system
US4222263A (en) * 1978-03-18 1980-09-16 Lucas Industries Limited Crankshaft position transducer system
EP0269117A1 (en) * 1986-11-26 1988-06-01 Chengdu Aircraft Corporation Continuous spark electronic igniter

Also Published As

Publication number Publication date
AT312999B (de) 1974-01-25
DE2037336A1 (de) 1972-02-10
SE381916B (sv) 1975-12-22
DE2037336B2 (de) 1975-10-09
CH526045A (de) 1972-07-31
JPS531442B1 (enrdf_load_stackoverflow) 1978-01-19
FR2103790A5 (enrdf_load_stackoverflow) 1972-04-14
ES393689A1 (es) 1974-07-01
CA937631A (en) 1973-11-27
GB1335136A (en) 1973-10-24

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