Patent ID: 7141000

Claim:
An engine idle speed control device for an engine comprising: a first traveling target idle speed setting section configured to change a target idle speed from a non-traveling target idle speed to a first traveling target idle speed that is lower than the non-traveling target idle speed upon detecting an automatic transmission being shifted from a non-traveling range to a traveling range; a second idle speed setting section configured to change the first traveling target idle speed to a second traveling target idle speed that is lower than the first traveling target idle speed upon detecting a prescribed period has elapsed since detecting that the automatic transmission was shifted; and an ignition timing retardation section configured to selectively set a retardation amount of an ignition timing based on an actual engine rotational speed when the first traveling target idle speed has been set, with the retardation amount being set such that as the engine rotational speed becomes higher, the ignition timing is set to be more retarded.