Patent ID: 7169078

Claim:
An engine idle speed control device comprising: a first 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; a friction detecting section configured to detect a parameter indicative of at least one of engine friction and automatic transmission friction; and an ignition timing retardation section configured to selectively set a revision amount of an ignition timing to revise the ignition timing to a more retarded ignition timing based on the parameter upon the target idle speed being changed from the non-traveling target idle speed to the first traveling target idle speed, with the revision amount being set such that as the friction becomes less, the ignition timing is set to be more retarded.