| 摘要 |
PURPOSE:To reduce the exhaust emission by smoothing the air fuel ratio in transition by making the fundamental fuel injection itself close to the engine demand value by taking into consideration of the adhesion of fuel due to the variation of the suction pipe pressure and the engine temperature. CONSTITUTION:The weighted average value of the intake pipe pressure at present is calculated from the intake pipe pressure at present and the weighted average value of the intake pipe pressure which is detected in the past, by the detection signal of a pressure sensor 6, in an electronic control circuit 44. The fundamental intake pipe pressure which is corrected according to the engine temperature by the detection signal of a water temperature sensor 34 is determined by adding the first weighted average value to the value which is obtained by subtracting the second weighted average value in which the constant corresponding to the weight is increased, from the first weighted average value in which the constant corresponding to the weight is decreased. Then, the fundamental fuel injection is determined from the fundamental suction pipe pressure and the engine speed. Then, the fuel injection corresponding to the engine demand value is obtained.
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