| 摘要 |
This invention concerns an apparatus for detecting a cylinder intake air volume based on the output of an air flow meter installed in an intake manifold. The apparatus determines a weighting average coefficient from predetermined calculation equations, and calculates the weighted average of the output of the air flow meter based on this weighting average coefficient so as to detect the actual cylinder air intake volume. Since the weighting average coefficient is determined from calculation equations and not from a map, the detection of the cylinder intake air volume is simple and precise irrespective of the type of engine. When applied to AFR control systems of an engine, it is preferable to correct the weighted average based on a variation rate of the weighted average when the engine is not running under predetermined high load conditions. AFR control can therefore be performed with accurate timing.
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