Electronic ignition control system

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition

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Details

123148E, 315209R, F02D 100

Patent

active

039406580

ABSTRACT:
An electronic ignition control system having a magnetically triggered input has an electronically controlled duty cycle to improve output voltage from a standard ignition transformer at increased engine speeds. A pulse width forming amplifier consisting of multiple transistor stages and associated components provides a power amplifying function combined with a timing function for improved ignition system performance. Sharp rise time pulses and noise immunity are realized by use of multiple feedback loops and low pass filtering. Coupled to the pulse width forming amplifier is a Darlington amplifier as an output stage for reduced power consumption and dissipation. The Darlington amplifier output stage provides a decrease in turn off time with a corresponding decrease in switching losses. The output of the Darlington amplifier drives a standard ignition transformer coupled to a spark source through a rotary distributor.

REFERENCES:
patent: 3496921 (1970-02-01), Boyer
patent: 3605713 (1971-09-01), Le Masters
patent: 3749974 (1973-07-01), Kissel

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