| 摘要 |
PURPOSE:To provide a smooth set up of rpm of an engine when it is accelerated by increasing the quantity of main fuel when it is injected at the acceleration time of the engine and unsynchronously injecting fuel when main-fuel injection is terminated at the aceleration time thereof. CONSTITUTION:When an engine runs, a control circuit 28 receives both an upper dead center signal sent from a crank angle sensor 26 and an engine rpm signal to discriminate whethr the injection timing of main fuel just comes, namely, a piston reaches the proximity of the top dead center in the suction stroke or not. If the circuit 28 discriminates NO, it determines whether the variation ratio of the throttle valve opening obtained from a throttle sensor 10 is over the specified value or not. If the circuit 28 determines YES, the circuit 28 computes an incremented-fuel injection time tau2 in order to increase fuel during acceleration. The circuit determines whether main fuel is being injected or not and if detemining YES, the main fuel injection time tau1 is elongated according to said incremented-fuel injection time tau2. If main fuel is not being injected and main fuel injection is completed, fuel is unsynchronously injected from a fuel injection valve 18 through said time tau2. |
