| 摘要 |
PURPOSE:To suppress a rise up of generated torque in an engine and to promote its low vibration, by correcting pulse width of a fuel injection pulse to be decreased and controlling the correction to be gradually returned to the original value over a predetermined period, when an engine parameter is largely changed. CONSTITUTION:When an engine 1 is in operation, a control unit 6 first calculates in S11 a basic injection pulse width tauB on the basis of output signals of an air flow sensor 4 and an engine speed sensor 5 next in S12 an injection pulse width tauC by multiplying said basic injection pulse width by a correction coefficient K1 obtained in accordance with water temperature, intake air temperature and an acceleration condition or the like. While it is decided in S20 whether or not an intake air quantity Qa changes by a predetermined value alphaor more, and when the decision is YES, a correction timer S21 is started. Said correction timer is provided to function such that the initial value of a correction coefficient Km corresponding to the predetermined value alpha gradually approaches 1 with the lapse of time. And while the correction timer is in operation, the control unit obtains the final injection pulse width tau by multiplying the pulse width tauC by a correction coefficient K2 with the correction coefficient Km in the correction coefficient K2 in S22.
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