| 摘要 |
An engine wherein a target air-fuel ratio is changed over according to the running conditions is provided with a device for computing a target throttle opening area based on the accelerator operation and a selected air-fuel ratio. It also includes a device for correcting the throttle opening such that the throttle opening area is equal to a target throttle opening area, a device for computing a fuel amount to be provided to the engine based on the target air-fuel ratio, intake air volume and engine speed, and a device for regulating the fuel supply to the computed amount. In this way, the throttle valve opening is corrected when the air-fuel ratio is changed, fluctuations in the torque generated by the engine are smoothed out, and torque shock due to the air-fuel ratio change-over is thereby prevented.
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