| 摘要 |
PURPOSE: A correction method of ignition angle in an idling state is provided to approach reference rpm by repeatedly correcting a correction value of the ignition angle corresponding to change of the water temperature and actual rpm and corresponding to height difference between ignition advancing degree and ignition retardant degree after sequentially inputting data about raising or dropping correction value. CONSTITUTION: A correction method of ignition angle in an idling state comprises the steps of: comparing if engine rpm is in an idling state; comparing height difference between ignition advancing degree and ignition retardant degree of actual rpm with reference data value of a control unit in an idling state; correcting the data value to extend or shorten ignition timing if the height difference is over the reference data value; deciding if corrected height difference is at least the same as the reference data value; and correcting ignition advancing or retardant degree if corrected height difference is at least the same as the reference data value. With the correction method, actual rpm of an engine approaches reference rpm. Thereby, fuel saving and low noise effects are obtained.
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