| 摘要 |
An ignition timing control appts. for an IC engine having a reference ignition timing comprises knock sensing means (1), signal deriving means for deriving knock signals from the output of the sensing means, correction magnitude determining means (50) for determining an ignition timing correction magnitude for suppressing the occurrence of knock, displacement magnitude determining means (52) for determining a displacement magnitude from one of an output of the knock signal deriving means and an output of the correction magnitude determining means, and ignition timing determining means for setting the reference ignition timing at an optimum ignition timing angle for the engine.
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