ENGINE CONTROL DEVICE

To enable the detection of an accelerating condition from the phase of a crankshaft and an induction air pressure so as to obtain an acceleration feeling that corresponds to the accelerating condition so detected. A stroke condition is detected from'a rotational angle of the crankshaft and an induction air pressure, and a differential pressure between induction pipe pressures detected at a predetermined crank angle on an exhaust stroke and an induction stroke and induction pipe pressures resulting at the same crank angle on the same strokes is calculated as an induction air pressure difference DELTA PA-MAN. Then, the induction air pressure difference DELTA PA-MAN so calculated is compared with a threshold set each crank angle, and when the induction air pressure difference DELTA PA-MAN is equal to or larger than the threshold, an accelerating condition is determined to be occurring, and fuel in acceleration is immediately added to a steady-state fuel injection amount for injection. The steady-state fuel injection amount is obtained by detecting an induction air amount from an induction air pressure. In order to improve the detection accuracy of the accelerating condition and the induction air amount, a volume from a throttle valve to an induction port is made equal to or smaller than the volume of the stroke of a cylinder.