| 摘要 |
PURPOSE: To perform accurate estimation of a cylinder suction air amount by a method wherein the fluctuation of a filling air amount are detected by a detecting means and the primary delay correction factor of a throttle opening is individually set according to a case wherein a filling air amount is increased and a case wherein a filling air amount is decreased. CONSTITUTION: When a suction air amount is estimated by a control unit 50, an amount Gc of suction air to a combustion chamber when an engine is in a steady operation state is determined based on the number of revolutions of an engine and a pressure in a chamber. Further, based on a throttle opening and the pressure in the chamber, the first effective opening area A of a throttle is determined. The primary delay value of an effective opening area A is then determined and the value forms the second effective opening area B of the throttle and an actual suction amount Gc is determined by a formula of Gc= Gc'×(A/B). In this case, the fluctuation of a filling air amount is detected and according to a detecting result, the primary delay correction factor of the throttle opening is set. Based on the primary delay correction factor, the primary delay value of the first effective opening area A is determined.
|
