How to calibrate the idle flow rate when the engine speed decreases

摘要

The present invention relates to a method for correcting an idle flow rate in an automobile when the engine speed drops due to abrupt load fluctuation.;The configuration of the present invention includes an input value reading step of reading an engine speed, a feedback control amount, a first set value, a target engine speed, a second set value, and a rotational speed reduction correction amount in accordance with a sudden change in load, A first engine speed comparison step of comparing whether the engine speed is equal to or less than a first set value; and a second engine speed comparison step of comparing, when the engine speed is equal to or smaller than the first set value in the first engine speed comparison step, A second engine speed comparison step of performing the current speed lowering correction maintaining step when the engine speed is not greater than the sum of the target engine speed and the second set value, And a rotational speed reduction correction disappearing step in which the engine speed is gradually decreased in accordance with the decrease correction canceling expression when the engine speed is greater than the sum of the target engine speed and the second set value.;The advantage of the present invention is that by using the idle flow rate correction method when the engine speed drops, the flow rate of the idle speed control solenoid valve is weighted by compensating for the decrease in the engine speed when the engine speed drops due to the sudden change in load, Can be restored.