Semiconductor ignition system for internal combustion engines

Details Semiconductor ignition system for internal combustion engines Semiconductor ignition system for internal combustion engines

1976-07-21

1978-07-18

Pendegrass, Verlin R.

Internal-combustion engines

Igniters

Incandescent

123148S, F02P 304, F02P 300

Patent

active

041009088

ABSTRACT:
To provide for gradual decay of current flow through the primary of an ignition coil, and hence suppression of spurious sparks at spark plugs, a main switching transistor has its conductivity controlled by the conductivity of the emitter-collector path of a control transistor, the base-emitter path of which forms part of a discharge circuit of a control capacitor, which discharge circuit has a sufficiently high resistance to provide for gradual discharge of the capacitor and hence gradual transition of the conductivity of the control transistor.

REFERENCES:
patent: 3703889 (1972-11-01), Bodig et al.
patent: 3745985 (1973-07-01), Hohne
patent: 3854466 (1974-12-01), Steinberg et al.

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