Ignition timing control system for internal combustion engines

Details Ignition timing control system for internal combustion engines Ignition timing control system for internal combustion engines

1979-08-20

1981-05-26

Myhre, Charles J.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

F02P 514

Patent

active

042691559

ABSTRACT:
An ignition timing control system for internal combustion engines includes a knock detecting circuit for determining the presence or absence of the knocking in response to a signal from a knock detector, and includes a correction advance computing circuit for computing a correction value of ignition advance thereby to retard the ignition timing by a predetermined angle when the knock is present and to advance the ignition timing when the knock is absent. A further battery is provided to supply electric power to the correction advance computing circuit even after a key switch associated with a main battery for supplying power to the ignition timing control system has been turned off. Hence, the correction advance computing circuit memorizes the computed advance correction value corresponding to a knock condition of the engine just prior to the turn-off of the key switch and the memorized advance correction value is made available in a subsequent operation of the ignition timing control system.

REFERENCES:
patent: 3969614 (1976-07-01), Majer et al.
patent: 4133475 (1979-01-01), Harned et al.
patent: 4169438 (1979-10-01), Iwase et al.
patent: 4174688 (1979-11-01), Honig et al.
"Electronic Circuits Manual" p. 262 by Markus copyright 1971.

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