DRIVING FORCE CONTROL METHOD AND SYSTEM FOR VEHICLE

A driving force control device for a vehicle V comprises: a D-μ map M defining a linear correlation between a driving stiffness D and a maximum road surface μ; a slip ratio calculation circuit for calculating a slip ratio S of one of a pair of front road wheels L, R; a DS calculation circuit for calculating the driving stiffness D corresponding to a value the slip ratio S calculated by the slip ratio calculation circuit ; a maximum road surface μ calculation circuit for assigning a value of the driving stiffness D calculated by the DS calculation circuit to the D-μ map M to calculate the maximum road surface μ; and a driving force distribution circuit for controlling a driving force, using a value of the maximum road surface μ calculated by the maximum road surface μ calculation circuit