| 摘要 |
PURPOSE:To improve a focused speed, by arranging a control speed at a negative deviation larger than at a positive deviation when a throttle bypass air amount is adjusted from the deviation between an engine speed and a target value to perform feedback control of an idle speed. CONSTITUTION:A controller, in which at idle operation of an engine, a throttle bypass air amount is adjusted to feedback control an idle speed to a target value, calculates a deviation DELTANE between an actual speed NE and a target value NF in a step 50 to decide whether the deviation DELTANE becomes above 0 or not in a step 51. In accordance with the deviation DELTANE at least 0 or negative, the controller advances to steps 52-53 or steps 55-56, when negative, the deviation is set larger than f1 (DELTANE), g2 (DELTANE) with a proportional amount f2 (DELTANE), integration constant g2 (DELTANE) in a control signal at above 0. Accordingly, the speed at an increase of revolution can be equalized to the speed at a decrease. |
