FUEL INJECTION CONTROLLER OF INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To improve the startability by decreasing the quantitatively compensated fuel addition after the starting time of an engine to a specified value or less when a pressure regulator used for regulating fuel pressure is communicated with the atmosphere. CONSTITUTION:A pressure regulator 40 which regulates pressure of fuel supplied to a fuel injection valve 28 is able to be communicated selectively to either an intake passage 16 or the atmosphere via a solenoid valve 44. A post-start fuel increase compensating means 100 is connected to the solenoid valve 44 so that fuel may be kept compensated to increase in quantity for a specified duration after the starting. A guard setting means 102 is provided for the post- start fuel increase compensating means 100 to restrict the compensated fuel increase rate to a specified value or less when the pressure regulator 40 is being communicated with the atmosphere. The oversupply of fuel due to the release of the pressure regulator 40 to the atmosphere can then be compensated, hence improving the startability.