ELECTRONIC FUEL INJECTION DEVICE FOR ENGINE

PURPOSE:To exactly control an amount of injection fuel according to change in an actual amount of suction air at acceleration in an engine for an automobile, by correcting a fundamental amount of injection fuel according to acceleration of change in a suction air amount signal from an air flow sensor. CONSTITUTION:At acceleration, a suction air amount signal from an air flow sensor 13 is changed into velocity of change by a first differentiating circuit 23 of a control unit 12, and is further changed into acceleration of change by a second differentiating circuit 24. Then, increment to be corrected is computed by a correction signal generating circuit 25. Further, a fundamental amount of injection fuel is obtained by an operating circuit 21 in receipt of the suction air amount signal from the air flow sensor 13 and an engine rotational speed signal from a sensor 6. Then, the increment from the circuit 25 is multiplied to the fundamental amount of injection fuel by a correcting circuit 26, and a fuel injection valve 9 is controlled by a drive pulse from a drive pulse generating circuit 27. Thus, it is possible to prevent an air-fuel ratio from being made lean at an initial stage of acceleration and being made rich at a terminal stage of acceleration.