Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy
Patent
1979-11-28
1982-04-20
Lall, P. S.
Internal-combustion engines
High tension ignition system
Using capacitive storage and discharge for spark energy
123603, 123633, 123599, F02P 102
Patent
active
043253504
ABSTRACT:
An alternator-powered breakerless capacitor discharge ignition system for an alternate firing two-cylinder outboard motor provides improved timing characteristics at low, as well as high, engine speeds and prevents reverse engine rotation. The alternator rotor and stator assemblies define a first magnetic circuit which provides constant polarity, constant power pulses for charging a single capacitor in the system. The alternator rotor and trigger assemblies define a second magnetic circuit which provides synchronized narrow trigger pulses, successive one's being of opposite polarity, to operate an electronic control circuit to effect timed capacitor discharge to a pair of spark plug ignition coils in the system. The first magnetic circuit includes a pair of relatively narrow ceramic permanent magnets spaced 180.degree. apart on the alternator rotor flywheel for energizing series-connected, oppositely wound, spaced apart low-speed and high speed stationary windings in the stator assembly. The second magnetic circuit includes a two-pole magnetic strip on the flywheel hub for energizing an adjustably positionable (advance/retard) specially designed trigger coil in the trigger assembly. The low speed winding, the capacitor, and the ignition coils each have one side grounded to reduce system wiring complexity and cost.
REFERENCES:
patent: 3715650 (1973-02-01), Draxler
patent: 3747582 (1973-07-01), Kato
patent: 3805759 (1974-04-01), Fitzner
patent: 3911886 (1975-10-01), Nagasawa
patent: 4007724 (1977-02-01), Mura
patent: 4054113 (1977-10-01), Sleder et al.
patent: 4160435 (1979-07-01), Sleder
patent: 4200078 (1980-04-01), Cavil et al.
Bauer Michael E.
Sleder Richard L.
Brunswick Corporation
Lall P. S.
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