Digital ignition timing controller

Details Digital ignition timing controller Digital ignition timing controller

1978-05-16

1981-03-31

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123418, F02P 504

Patent

active

042586844

ABSTRACT:
A digital electronic spark timing control for an internal combustion engine. Independent parameters such as engine speed and manifold pressure are measured and encoded as multibit digital words. A digital memory stores spark advance angle as a function of two independent parameters. The digital memory is addressed by the most significant bits of the multibit words to obtain coarse values of spark timing. Interpolation is performed on the coarse values according to the least significant bits of the digital words to produce the spark advance angle appropriate for the measured parameters. Means synchronized with engine position, i.e., top center, convert the spark advance angle to spark initiation signal.

REFERENCES:
patent: 3835819 (1974-09-01), Anderson, Jr.
patent: 3904856 (1975-09-01), Monpetit
patent: 3964443 (1976-06-01), Hartford
patent: 4044236 (1977-08-01), Bianchi et al.
patent: 4051822 (1977-10-01), Yoshida
patent: 4083347 (1978-04-01), Grather et al.
patent: 4119069 (1978-10-01), Perrin
patent: 4121553 (1978-10-01), Hasegawa
patent: 4142493 (1979-03-01), Schira et al.

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