| 摘要 |
PURPOSE:To permit the always superior air-fuel ratio control by restricting the driving time of each injector by the value nearly proportional to the crank angle cycle. CONSTITUTION:A controller 30 successively generates driving signals into each injector 14 installed for each cylinder at the driving time corresponding to the output of an air flow sensor 13 for detecting the intake quantity of an engine 1. When the output cycle of a crank angle sensor 17 is represented by T, and an integer is represented by n, and a prescribed value is represented by To, the driving time of each injector 14 is restricted by TXn-T0. Therefore, the OFF-time each injection is secured, and the shift of the supplied fuel quantity to the much quantity is prevented, and the proper air-fuel ratio control can be carried out. Further, since the restriction time is made nearly proportional to the crank angle cycle corresponding to the engine revolution, the obstruction for the operation due to the restriction in the ordinary acceleration operation is prevented.
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