| 摘要 |
Detected first is fluctuation of engine revolution speed that varies with torsional vibration occurring in a drive train when the vehicle is acceleratedldecelerated. A basic amount of fuel injection (Qbase) is determined from an accelerator opening (APS) and engine revolution speed (RPM). An intermediate value (Qbad), which is an amount of fuel needed at the time of drive power being first transmitted to drive wheels from an engine, is determined from water temperature (Tw) and engine revolution speed (RPM). A difference (Qabs) is calculated by subtracting the intermediate value (Qbad) from the basic value (Qbase). A correction value (Qacl2) to counterbalance the fluctuation of the engine revolution speed (RPM) is then determined based on the difference (Qabs), engine revolution speed (RPM), engine revolution speed change (DELTARPM) and/or its differential value (DDELTARPM). A target amount of fuel injection (Qfnl) is sequentially increased/decreased in accordance with the correction value (Qacl2), thereby attenuating the torsional vibration.
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