Method and apparatus of ignition timing control

Details Method and apparatus of ignition timing control Method and apparatus of ignition timing control

1983-06-10

1986-04-15

Gruber, Felix D.

Boots, shoes, and leggings

73 35, 123425, F02P 504, F02P 514

Patent

active

045831750

ABSTRACT:
An ignition timing control method compensates for the variations in characteristic among different knock sensors and for the aging of a knock sensor of an engine by detecting the output of the knock sensor under an engine operating condition which is less conductive to knocking phenomenon, e.g., the idling operation, comparing the detected sensor output with a plurality of preliminarily stored reference values to detect and store the sensitivity of the sensor, computing an amount of retard in accordance with a knock intensity detected under a knock control condition and the stored sensor sensitivity, obtaining a correction amount in accordance with the retard amount, and correcting a basic ignition timing in accordance with the correction amount thereby determining a final ignition timing, and an apparatus carrying out the method.

REFERENCES:
patent: 4268910 (1981-05-01), Omori et al.
patent: 4356551 (1982-10-01), Iwase et al.
patent: 4367531 (1983-01-01), Furuhashi et al.
patent: 4387588 (1983-06-01), Kaji
patent: 4416235 (1983-11-01), Utsumi et al.
patent: 4471736 (1984-09-01), Yoshida et al.
patent: 4477875 (1984-10-01), Suzuki et al.
patent: 4481924 (1984-11-01), Kobayashi

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