| 摘要 |
PURPOSE:To increase the accuracy of a correction factor by forbidding the learning of the correction factor of the feedback control of an air-fuel ratio when an evaporated fuel is being discharged from a canister into an intake passage. CONSTITUTION:The lower course side from a throttle valve 18 of an intake pipe 12 is connected to a canister 28 through a pipe line 26 in which a solenoid valve 30 is provided. An electronic control device 16 receives signals from the O2 sensor 21 of an exhaust pipe 15 and various sensors, and controls an injection quantity from a fuel injection valve 20 in such a way that an air-fuel ratio agrees with a prescribed value. At the same time, the control device 16 learns a correction factor in a feedback control and corrects and stores it but, while the solenoid valve 30 is opened feeding an evaporated fuel to the intake pipe 12, the learning of the correction factor is forbidden. Thereby, the correction factor can be set accurately.
|
