DRIVING FORCE CONTROL DEVICE FOR VEHICLE

摘要

[Object] Providing a vehicle drive force control apparatus which enables an electric generator to generate a desired output even when a vehicle is running at a low speed [Means for achieving the object] The vehicle drive force control apparatus is provided for controlling a drive force of a vehicle which includes a main drive power source for driving main drive wheels through a coupling device and a transmission, an electric generator operated by a drive force generated by the main drive power source, and an electric motor which is driven by electric power generated by the electric generator, to generate a drive torque that can be transmitted to auxiliary drive wheels. The vehicle drive force control apparatus is arranged to control the coupling device and the transmission to reduce an engaging force of the coupling device and shift up the transmission during driving of the auxiliary drive wheels, so that the operating speed of the main drive power source raised according to a load of the coupling device, while the amount of electric power generated by the electric generator is increased, permitting an increase of the drive torque of the auxiliary drive wheels and a stable 4-wheel-drive control of the vehicle.