| 摘要 |
PURPOSE:To suppress the furtherance toward a lean side of air-fuel ratio by increasing a fuel pressure when a cooling water temperature, etc. at the time of starting an engine is above a defined value, and making an integral coefficient above a defined value when the fuel pressure is shifted low afterward, to control a fuel injecting time to a rich side. CONSTITUTION:A fuel piping 11 for introducing fuel from a fuel pump FP to a fuel injection valve 6 is connected to a pressure regulator 12 which is operated according to a pressure (atmospheric pressure or negative pressure) from a pressure changeover valve 9 and which regulates a fuel injection pressure by appropriately recirculating the fuel to a fuel tank FT. The pressure changeover valve 9 is controlled so as to introduce atmospheric pressure into an air pressure chamber 12a for a defined time when a cooling water temperature becomes above a defined value by an electronic control device 18. Also, control is performed so as to integrally process the output of an air-fuel ratio sensor 17 within the defined time as mentioned above and after starting an engine to obtain an integral coefficient, to reset the integral coefficient to above a defined value at which air-fuel ratio is on a rich side when the integral coefficient is less than the defined value, and to control a fuel injecting time according to this integral coefficient. |
