| 摘要 |
PURPOSE:To markedly improve the fuel consumption efficiency and exhaust characteristic by installing a fuel injection-amount increase-correcting means for increase-correcting the fundamental injection quantity according to the number of operating cylinders or the number of repose cylinders under the specific operation conditions. CONSTITUTION:A fundamental injection quantity setting circuit 51 sets the fundamental fuel injection quantity Pq on the basis of the intake air quantity Sq and the engine revolution speed Se. A fundamental injection quantity correcting circuit 55 corrects the fundamental fuel injection quantity Pq, and supplies the correction injection pulse signals Pq' into a final injection quantity setting circuit 57. A switching circuit 59 is controlled according to the level of the output signal Pn supplied from a deceleration operation detecting circuit 53. In case of the partial cylinder operation in the deceleration operation state, the fundamental injection quantity correcting circuit 55 carries-out the amount increasing correction according to the number of repose cylinders for the funda mental fuel injection quantity. Thus, fuel consumption efficiency and exhaust characteristic can be markedly improved.
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