CD ignition system with spark retard in neutral

Patent · Mon Mar 24 23:00:00 EST 1986

OSTI ID:5856243

Donohue, J A

This patent describes a capacitor discharge ignition circuit for use with an internal combustion engine. The circuit consists of a charge capacitor, a primary ignition coil, an ignition SCR, first spark retard circuit means in series with the charge capacitor, the ignition SCR, and the primary coil and operative for selectively preventing discharge of the capacitor through the primary coil for a first predetermined period of time after the ignition SCR is rendered conductive, thereby providing for automatic spark retard at higher engine rpm. The second spark retard circuit is connectable to the first spark retard circuit for further preventing discharge of the capacitor through the primary coil for a second predetermined period of time in addition to the first predetermined period of time after the ignition SCR is rendered conductive. A connector for connecting the second spark retard circuit to the first spark retard circuit is used when the engine is in neutral.

• Assignee: Outboard Marine Corp., Waukegan, IL
• Patent Number(s): US 4577609
• OSTI ID: 5856243
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
CAPACITORS
DESIGN
ELECTRIC COILS
ELECTRIC CONDUCTIVITY
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
PHYSICAL PROPERTIES
SPARK IGNITION ENGINES
TIME MEASUREMENT