Digital timing system for spark advance

Details Digital timing system for spark advance Digital timing system for spark advance

1980-06-20

1983-03-01

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Fuel injection system

123418, 123486, F02P 504

Patent

active

043752098

ABSTRACT:
A means to set spark timing in accordance with engine speed includes a counter to count clock pulses between engine speed reference pulses. A read-only memory has successive memory locations each storing an addend quantity and a repeats number. An adder unit, including an accumulator, operates to access the memory locations, and to add the addend quantities to the contents of the accumulator repeatedly a number of times equal to the respective repeats numbers. A comparator produces an ignition firing pulse when the contents of the accumulator corresponds with the reference period number provided by the counter.

REFERENCES:
patent: 3964443 (1976-06-01), Hartford
patent: 4009378 (1977-02-01), Sakamoto
patent: 4036190 (1977-07-01), Bigliani
patent: 4249493 (1981-02-01), Honig

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