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US 4,054,113 AGranted
Ignition breakerless and distributorless multiple cylinder ignition system
AssigneeBrunswick Corporation
InventorsRichard L. Sleder, Robert J. Beck
Life of this patent
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AssigneeBrunswick Corporation
InventorsRichard L. Sleder, Robert J. Beck
Estimating the term…
A two cylinder, two cycle engine for an outboard motor includes an alternator driven, capacitor discharge ignition system. The alternator includes an annular permanent magnet secured within a flywheel skirt and includes a pair of circumferential opposite poles with diametrical spaced neutral areas. The magnet is a flexible ferrite strip with a butt joint at one of the neutral areas. A stator assembly is mounted within the annular rotor and includes a semicircular core with a charging coil at each end. Each movement of the magnetic gap means past the coils generates a pulse. A trigger coil within a housing is mounted in coplanar relation between the charging coils, with a pole aligned with and spaced from the stator core. The housing is rotatably mounted and includes an integral cam for positioning a throttle lever. A pair of capacitors are connected in parallel to the charging coils through steering diodes such that the one capacitor is charged from one of the polarity pulses while the other capacitor is charged from opposite polarity pulse. A common gated controlled rectifier is connected in a discharge path for both of the capacitors through individual pulse transformers and isolating diodes. Only the charged capacitor provides energy through its pulse transformer. A full wave rectifier rectifies each trigger pulse and is connected by a trigger circuit to the gate of the controlled rectifier.
An alternator for charging of an ignition capacitor and actuating of a switch means to discharge said capacitor for firing of an internal combustion engine having a drive shaft and having firing means connected to said capacitor, said alternator comprising an annular rotor having a plurality of circumferentially extended magnet members defining circumferentially spaced essentially neutral pole positions, a shaft mounting means connected to said rotor with a center axis of rotation and adapted to be connected to be driven from said shaft, a stator assembly, a support means for mounting said stator assembly in fixed position concentrically of said rotor and having a magnetic core having pole positions spaced slightly from the periphery of the magnet members on the rotor and having charging winding means mounted on each pole piece of said core, a trigger winding located in the common plane with said charging means, a movable mounting means connected to said trigger winding and providing for angularly positioning the trigger winding about said center axis with respect to said shaft mounting means and said charging winding means, and a remote throttle and timing control means connected to said mounting means for adjusting the angular position of said trigger winding thereby adjusting the timing with the throttle setting for the engine.
An alternator for charging of an ignition capacitor and actuating of a switch means to discharge said capacitor for firing of an internal combustion engine having firing means connected to said capacitor and having a throttle control element, comprising an annular rotor having a magnetic iron ring and a flexible ferrite strip secured within said ring and defining a pair of circumferentially extended magnetic poles each spanning essentially 180.degree. of the rotor and defining oppositely located essentially neutral pole positions, said poles being formed by polarization of said ferrite strip at diametrical opposite points, drive shaft means coaxilly connected to said rotor, a fixed stator assembly mounted within the rotor and having a laminated pole member spanning essentially 180.degree. and terminating in the opposite ends in a pair of radially outwardly extending pole pieces having charging coils wound thereon and with the end face thereof spaced slightly from the periphery of the magnetic strip on the rotor, means for fixedly mounting of the pole member, a trigger coil having a housing, a mounting ring member secured to said housing and rotatably attached to the stator assembly for angular positioning of the trigger coil with respect to said stator assembly and said pole member, said trigger coil being located in the common plane with said charging coils, a throttle cam member adapted to be coupled to the throttle control element and integrally formed with the mounting ring member and correspondingly positioned therewith to establish a predetermined relationship between the throttle setting and the generation of the trigger pulse signal.
In an outboard motor having a two cycle, two cylinder, internal combustion engine, an alternator connected to the upper end of the crankshaft and comprising an inverted cup-shaped flywheel member secured to the crankshaft, a ring magnet secured within the periphery of the cup-shaped flywheel, a stator assembly fixedly secured to the engine and located within the flywheel and including a charging coil means fixedly secured in relationship to said engine and a separate trigger coil means located in coplanar relationship with said charging coil means and with said magnetic ring member, and a movable mounting means connected to said trigger coil means for mechanically positioning of the trigger coil means with respect to the stator to provide operational adjustment of the firing angle of the engine, and a remote engine throttle control element connected to said mounting means for adjusting the angular position of the trigger coil means and thereby adjusting the timing with the throttle setting for the engine.
Dependencies are inferred from the claim text.