Electronically controlled fuel injection apparatus for internal combustion engine

Claim 1

An electronically controlled fuel injection apparatus, including a crank angle sensor for detecting the revolution number of an internal combustion engine and an air flow sensor for detecting the amount of air sucked by an engine cylinder, fuel being supplied to said engine in the amount determined in dependence on output signals produced by both of said sensors, respectively, further comprising a throttle sensor for detecting throttle aperture, first means for sampling at a predetermined periodic interval the signal produced by said throttle sensor and representing the throttle aperture, second means for comparing the signals sampled at every interval by said first means to detect the rate of change of the throttle aperture, selecting means for selecting a deceleration correcting coefficient at each sampling interval based on the rate of change of the throttle aperture, integrating means for integrating the deceleration correcting coefficients selected at each interval during deceleration and third means for performing correction of deceleration with the aid of said integrated deceleration correcting coefficients when the value resulting from said comparison is not smaller than a predetermined value.