| 摘要 |
PURPOSE:To control variation of fuel injection when even in the driving time at a high place and the like, and prevent rough idling caused by overrich condition so as to improve drivability and the like by varying a lowermost guard value of a fuel injection time according to atmospheric pressure. CONSTITUTION:To an intake passage 17 of an internal combustion engine 11, fuel form a fuel injection valve 16 is injected. The atmospheric pressure around the engine 11 is detected by a means 12, and a lowermost guard value of a fuel injection time is varied by a means 13 according to the detected pressure. The basic fuel injection time and the lowermost guard value are respectively calculated by a means 14. A fuel injection valve 16 is controlled only for the calculated final fuel injection time based on the calculated fuel injection time and the lowermost guard value. The lowermost guard value of the fuel injection is varied according to the pressure so as to improve drivability and the like even in the driving time at a high place. |
