FUEL CONTROLLING DEVICE FOR ENGINE

PURPOSE:To enable a fuel injection amount to be precisely controlled by means of the linear region of an injection valve, by a method wherein an interval of a fuel injection time is set to a relatively high value when an engine is not during acceleration to increase an injection amount per one time. CONSTITUTION:A first operation state detecting means detects an operation state, prevailing not during acceleration, in response to a signal from an airflow meter and a sensor for the number of revolutions of an engine. After receipt of the signal, a fuel injecting device sets an interval of a fuel injection time to a relatively high value, for example, so that fuel is injected one time each time an engine is rotated 2 times to increase an injection amount per one time, and a fuel injection amount is precisely controlled by means of the linear region of a fuel injecting valve. Meanwhile, when a second operation state detecting means decides an acceleration state from a change amount of an intake air amount, a correction signal, by means of which an interval of a fuel injection time is decreased, is outputted from a correcting means to a fuel injecting device to decrease a time interval, and this improves acceleration response and prevents the rapid change of an air-fuel ratio during the primary stage of acceleration.