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US 3,937,200 AGranted
Breakerless and distributorless multiple cylinder ignition system
AssigneeBrunswick Corporation
InventorsRichard L. Sleder, Arthur O. Fitzner
Life of this patent
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AssigneeBrunswick Corporation
InventorsRichard L. Sleder, Arthur O. Fitzner
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 pulses. 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.
A capacitor discharge ignition system for a multiple cylinder internal combustion engine comprising a charging circuit connection means providing time spaced opposite polarity signals between a pair of terminal means, a first capacitor means selectively connected to the charging circuit connection means across said terminal means and charged in response to a first polarity signal, a second capacitor means connected to the charging circuit connection means across said terminal means and charged in response to an opposite polarity signal, first and second individual discharge circuit means connected across each of said capacitor means, and a common discharge control switch means connected as a common conducting part of both of said discharge circuit means for discharge of the corresponding capacitors and including diode network means connected between opposite sides of the control switch means and capacitor means and establishing individually operable discharge circuits for each of said capacitor means in series with said switch means, and maintaining isolation of the charging circuit means and of the discharging circuit means.
Dependencies are inferred from the claim text.