| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve detecting accuracy of an intake air flow with an air flow meter. <P>SOLUTION: A real intake air flow is calculated based on an air-fuel ratio AF and a fuel injection amount detected with an air-fuel ratio sensor under conditions where an air flow meter Vs is in a pulsation state and the detecting accuracy of the air-fuel sensor is assured. An air flow meter detecting errorΔG is calculated in comparison with the real intake air flow and a tentative detected intake air flow GO detected with the air flow meter. An air flow meter detecting error learning valueΔG (AREA) corresponding to an engine operating condition at that time is updated (learned). Then, under conditions where an air flow meter output Vs is in a transient state and the detecting accuracy of the air-fuel ratio sensor is not ensured, the tentative detected intake air flow GO is correlated using the air flow meter detected error learning valueΔG corresponding to the engine operating state at that time to obtain a final detected intake air flow G. <P>COPYRIGHT: (C)2004,JPO</p> |
