Patent ID: 8321121

Claim:
A fuel injection control apparatus comprising: a supply control section configured to control a supply amount of a fuel supplied to an internal combustion engine based on a detected prescribed vehicle running state; a stop control section configured to stop supplying the fuel upon detecting that a first prescribed vehicle running state exists that is indicative of a vehicle coasting; a timing estimating section configured to use a fluctuation rate of an engine rotational speed of the engine to estimate a timing signifying an end to rotational play takeup in a drive train transmitting a drive force from the engine to a wheel when a state of the drive train changes from a non-drive state in which the engine rotates due to a force from the wheel to a drive state in which the wheel rotates due to the drive force of the engine; and a torque recovery control section configured to resume supplying the fuel upon detecting that a second prescribed vehicle running state exists that is indicative of vehicle acceleration, and configured to use the timing signifying the end to rotational play takeup as a reference trigger to stop resumption of fuel being supplied for a prescribed amount of time, the timing estimated by the timing estimating section corresponding to a peak engine rotational speed of the engine resulting from the engine rotational speed increasing and then the engine rotational speed immediately decreasing.