SUCTION AIR AMOUNT CONTROL IN IDLING FOR INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To improve an accuracy in controlling the amount of suction air in the idling of an internal-combustion engine by operating a control valve on the basis of correction values according to the atmospheric pressure and to both an engine temperature and the atmospheric pressure. CONSTITUTION:A fist correction value KPAD according to a detected atmospheric pressure PA and then current IMTW for energizing a control valve according to an engine cooling water temperature TW are read from a table. Then a second correction value IPA is calculated on the basis of the first correction value KPAD and an anticipated value IMTW. Further, a control amount command value ICMD for the control value is calculated. Thus, an engine speed in the idling of an internal-combustion engine can be accurately controlled.