Patent ID: 6152105
Filing Date: 2000-11-28
Classification: F02D,F02P,Y02T

Abstract:
An idle speed control device comprising:engine speed detecting means for detecting an actual speed of an engine;idle speed control means for determining a value of an ignition timing feedback control variable by a predetermined control gain in a feedback control on the basis of a difference between the actual speed and a target speed such that the actual speed of the engine is converged at the target speed in an idle drive state, and for determining an idle ignition timing by the ignition timing feedback control variable to execute an ignition timing feedback control;ignition executing means for executing ignition on the basis of the idle ignition timing;torque variation detecting means for detecting a torque variation caused by combustion of the engine; andcorrection means for correcting the predetermined control gain in the ignition timing feedback control to be decreased, as the torque variation is small.