| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress degradation in emission performance when resetting a fuel-cut. Ž<P>SOLUTION: An electronic control device 1 includes: a purge control means relating to a purge device 60 leading fuel evaporative gas into an intake passage 21 to be a purge flow rate according to pressure of the intake passage 21; a rich control means in resetting fuel-cut, setting a target air-fuel ratio to be a rich air-fuel ratio in resetting fuel-cut, and feedback-controlling a fuel supply amount of a fuel injection valve 54 to be the target air-fuel ratio, based on a purge flow rate and an intake air amount; and a fuel increase amount upper limit value setting means, setting a tolerance upper limit value of an increase amount side of the fuel supply amount in the rich control in resetting fuel-cut. The rich control means in resetting fuel-cut prohibits the rich control in resetting fuel-cut to perform a normal air-fuel ratio feedback control, when the fuel supply amount in the rich control in resetting fuel-cut reaches the tolerance upper limit value and an actual air-fuel ratio is a lean air-fuel ratio. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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