Patent ID: 7532968

Claim:
A vehicle driving force control apparatus of a vehicle comprising: an electric motor driven by electric power from a generator to supply torque to a first drive wheel; a main drive source coupled to the generator to mechanically drive the generator, the main drive source being configured and arranged to supply torque to a second drive wheel; a shift schedule change section configured to perform a transmission shift schedule changing operation from a first shift schedule of a transmission to a second shift schedule of the transmission upon detection of selected conditions indicating that a change from the first shift schedule to the second shift schedule is desired, the transmission shift schedule changing operation changing an rpm shift threshold for a given accelerator opening degree, the first shift schedule being used for shifting the transmission from one gear to a next adjacent gear, the second shift schedule being used for shifting the transmission from the one gear to the next adjacent gear; a power sufficiency determining section configured to determine whether generated power of the generator will be insufficient to drive the first drive wheel with an electromotive force from the generator to the electric motor if the transmission shift schedule changing operation is performed; and a shift schedule change prohibit section configured to prohibit the transmission shift schedule changing operation even when the selected conditions are detected, upon the power sufficiency determining section determining that the generated power of the generator will be insufficient if the transmission shift schedule changing operation is performed.