Electronic ignition timing control system for internal combustio

Details Electronic ignition timing control system for internal combustio Electronic ignition timing control system for internal combustio

1978-01-10

1979-07-31

Cox, Ronald B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02P 504

Patent

active

041626672

ABSTRACT:
An electronic ignition timing control system for an internal combustion engine which comprises a rotational angle detector for detecting a rotational angle of the engine to produce output pulses, a reference angle detector for detecting a reference rotational angle of the engine to produce a reset pulse, an ignition angle computing circuit for converting by interpolation the advance angles corresponding to principal points of engine parameter address into the retard angles from the reference angle to produce a first output signal indicative of an angle corresponding to the rotational angle of the engine and a second output signal indicative of the delay time corresponding to an angle smaller than the first output signal value, a first comparator to digitally compare the first output value of the ignition angle computing circuit with the number of the output pulses of the rotational angle detector, and a second comparator to convert the second output value of the ignition angle computing circuit into a time period whereby the instant that the conversion is completed is selected as desired ignition timing.

REFERENCES:
patent: 3955723 (1976-05-01), Richards
patent: 4063539 (1977-12-01), Gorille et al.
patent: 4127092 (1978-11-01), Fresow

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