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

1977-08-16

1979-09-18

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, F02P 504

Patent

active

041679237

ABSTRACT:
In response to the input signal corresponding to the rotational speed of an internal combustion engine, a first read-only memory generates a binary coded signal indicative of the corresponding preliminarily written ignition retard angle from a predetermined angular position of the engine crankshaft, and in response to the input signal corresponding to the intake manifold vacuum a second read-only memory generates a binary coded signal indicative of the corresponding preliminarily written ignition retard angle. The output signals of the read-only memories are added together by an adder. A comparator compares the output signal of the adder with the number of clock pulses corresponding to the rotational angle of the crankshaft, and the ignition timing is determined by the output of the comparator.

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patent: 3752139 (1973-08-01), Asplund
patent: 3871342 (1975-03-01), Fujinami et al.
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patent: 4063539 (1977-12-01), Gorille et al.
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