| 摘要 |
<p>Provided is an air/fuel ratio inter-cylinder imbalance determination device (a determination device). On the basis of the output value of an air/fuel ratio sensor (67), the determination device acquires an imbalance determination parameter, which becomes the larger or smaller the larger the difference between the air/fuel ratios of mixtures to be individually fed to a plurality of cylinders are, and the air/fuel ratio inter-cylinder imbalance determination is made on the basis of a comparison between the imbalance determination parameter and an imbalance determination threshold value. The determination device inhibits "the acquisition of the imbalance determination parameter or the execution of the imbalance determination", if the intake air flow rate is lower than a predetermined first threshold air flow rate, and if "the intake air flow rate condition, which holds when the state in which the intake air flow rate is higher than the first threshold air flow rate continues longer than a predetermined first threshold time period," does not hold.</p> |
