A vehicle drive force control apparatus configured to make it possible to
increase the drive force when the vehicle is accelerating from a stopped
condition without increasing the size of its electric generator. In
particular, an output of an engine is delivered to the left and right
front wheels and to the electric generator. The output voltage of the
electric generator is supplied to an electric motor and the output of the
electric motor drives the left and right rear wheels. If it is determined
that the vehicle is stuck when the vehicle is attempting to accelerate
from a stopped condition (starting into motion from a stop), the target
slippage amount used for engine TCS control is increased.