CD ignition system with spark retard in neutral

Details CD ignition system with spark retard in neutral CD ignition system with spark retard in neutral

1984-12-07

1986-03-25

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123427, 123620, F02P 300

Patent

active

045776091

ABSTRACT:
A capacitor discharge ignition circuit adapted for use with an internal combustion engine, the circuit comprising a charge capacitor, a primary ignition coil, an ignition SCR, a first spark retard circuit 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, a second spark retard circuit 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, and a switch connecting the second spark retard circuit to the first spark retard circuit when the engine is in neutral.

REFERENCES:
patent: 4133325 (1979-01-01), West
patent: 4184467 (1980-01-01), Kato et al.
patent: 4273093 (1981-06-01), Ozawa
patent: 4391236 (1983-07-01), Anderson
patent: 4399801 (1983-08-01), Kondo et al.
patent: 4412522 (1983-11-01), Fujimoto
patent: 4413608 (1983-11-01), Beeghley
patent: 4441478 (1984-04-01), Fujimoto
patent: 4444171 (1984-04-01), Baxter
patent: 4480624 (1984-11-01), Anderson
patent: 4516554 (1985-05-01), Miura et al.

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