| 摘要 |
PURPOSE:To improve performance of an engine, by preventing the air-fuel ratio of mixture from becoming too rich at the time of rapid acceleration by effecting non-synchronous injection of fuel in case that the rate of timewise change in the opening of a throttle valve is greater than a prescribed value, and decreasing the injection quantity of fuel by the non-synchronous fuel injection in case that the rate of timewise change is greater than the prescribed value an at the same time power increasing conditions are satisfied. CONSTITUTION:When it is detected at a step 106 that the opening TA of a throttle valve is 45 deg. or more, a throttle flag TAF is set at a step 108 and the deviation DELTATA between the opening TA of the throttle valve at the time and the previous opening TAold of the throttle valve is calculated at the next step 110. Further, in case that it is detected at a step 112 that DELTATA is 1.7 deg. or more, it is judged further at a step 114 whether the throttle falg TAF is set or not. Here, in case that the throttle flag TAF is 0, it is judged at a step 116 whether a negative-pressure flag MPF is 1 or not, that is, whether power increasing condition are satisfied or not. In case that it is detected at the step 116 that the negative pressure flag MPF is 0, injectors 20 are driven by calculating the valve opening time T of the injectors at a step 118. |
