| 摘要 |
PURPOSE:To improve the acceleration response, by changing an asynchronous injection quantity according to a length of period from a required acceleration timing to the next suction stroke in each cylinder. CONSTITUTION:When a change in throttle opening angle from a throttle opening sensor 12 is determined to be a predetermined value corresponding to an angle at acceleration, or an idle switch is determined to be changed from ON to OFF in a control unit 20, a required acceleration timing is determined. Then, a crank angle at this time is read from a crank angle sensor 13, and cylinders are classified into a first cylinder group and a second cylinder group according to a length of period from the above crank angle to a crank angle of the next suction stroke in each cylinder, thereby obtaining the periods I1 and I2. If I1<I2, an asynchronous injection pulse width for fuel injection valves 7 in the first cylinder group is set to a predetermined injection pulse width A, while an asynchronous injection pulse width for fuel injection valves 7 in the second cylinder group is set to an injection pulse width B greater than the injection pulse width A.
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