Generator and triggering device for electronic ignition system

Claim 2

Generator with triggering devicE integral therewith for a breakerless ignition system having an electrical energy storage element and control means electrically connected with said triggering device for selectively discharging the energy from said storage element to cause an ignition spark in timed relation to the rotational position of the rotor of said generator, comprising a first magnetic circuit for said generator, including at least one coil wound on a magnetic core for charging said storage element, said triggering device including a coil and a relatively movable flux generating means forming a second magnetic circuit adjacent and axially offset from the first magnetic circuit and a ferromagnetic disc disposed in a plane axially between said generator and triggering device and being engaged with the core of the generator whereby the coil of the triggering device is shielded from stray flux lines of the first magnetic circuit.

Claim 3

Generator with triggering device integral therewith as set forth in claim 1, in which said generator is an alternator and includes ceramic magnets in which the magnetic force axially of the generator approaches one.

Claim 4

Generator with triggering device integral therewith as set forth in claim 2, in which the coil of said triggering device comprises a pair of coils wound in series opposition about a core member whereby any false signals induced in the coils by magnetic flux from the alternator magnets are in opposition and cancel so as not to improperly trigger said control means.

Claim 5

Alternator with triggering device integral therewith for a breakerless ignition system having an electrical storage element and silicon controlled rectifier with its gate electrode in circuit with the triggering device for selectively discharging the energy from said storage element through the anode-cathode junction of the rectifier to cause an ignition spark, said alternator comprising a first magnetic circuit including a core and relatively rotatable ceramic magnets disposed concentric therewith, at least one coil on said core connected to said storage element for charging the same in response to rotation of the alternator rotor relative to the stator, said triggering device including a coil and magnet relatively rotatable with the alternator and forming a second magnetic circuit adjacent to and axially offset from the first magnetic circuit and a ferromagnetic disc disposed in a plane axially between said alternator and triggering device and being engaged with the core of said alternator for shielding said triggering coil from stray lines of flux from the first magnetic circuit.

Claim 6

Alternator with triggering device integral therewith for a breakerless ignition system having an electrical storage element and silicon controlled rectifier with its gate electrode in circuit with the triggering device for selectively discharging the energy from said storage element through the anode-cathode junction of the rectifier to cause an ignition spark, said alternator comprising a first magnetic circuit including a core and relatively rotatable ceramic magnets disposed concentric therewith, at least one coil on said core connected to said storage element for charging the same in response to rotation of the alternator rotor relative to the stator, said triggering device including a coil and magnet relatively rotatable with the alternator and forming a second magnetic circuit adjacent to and axially offset from the first magnetic circuit and a ferromagnetic disc disposed in a plane axially between said alternator and triggering device and being engaged with the core of said alternator for shielding said triggering coil from stray lines of flux from the first magnetic circuit.

Claim 7

Alternator with triggering device integral therewith as set forth in claim 4 in which said ferromagnetic disc comprises a generally planar ring in contact with the core of said alternator whereby axially oriented lines of flux emanating from the alternator magnets are returned by said ferromagnetic disc to the alternator core.

Claim 8

Alternator with triggering device as set forth in claim 4 for use with an engine having a throttle control and in which the coil of said triggering device is mounted by said disc, said disc being angularly movable about the axis of said stator, and means interconnecting said disc with the engine therewith for changing the angular position of the triggering coil in response to movement of said throttle.