1. A method of managing the energy consumed by an automotive vehicle, for a given route between a point of departure A and a point of arrival B, wherein said method uses at least: a simulation unit incorporating a vehicle model predicting the behavior of said vehicle and a driver model predicting the behavior of the driver of said vehicle, said driver model receiving at its input a speed setpoint to be attained and the speed of said vehicle measured at successive instants, and supplying a motor torque setpoint to said vehicle model which is a function of said speeds and of the modelled driver behavior; an optimization algorithm interacting with said simulation unit; said method including a set of trajectories composed of the trajectory of said speed setpoint and at least the trajectory of a setpoint for controlling an item of auxiliary equipment, the trajectory of a setpoint describing the variation of said setpoint as a function of the position of the vehicle, said trajectories being calculated with respect to given objectives according to said optimization algorithm whose variables are formed from said setpoints, said method including a preliminary step including: a sub-step of storing an approximate profile of said route in the form of segments of straight lines, forming a first sequences of sampled positions XL(k) along the route, a sampled position XL(k) corresponding to the movement from one segment to the next segment; a sub-step of sampling said profile according to a spatial interval Xe, forming a second sequence of sampled positions Xe(j) along the route, the sampled positions Xe(j) being located within the segments; the trajectories of said setpoints being recalculated at each sampled position XL(k) of the first sequence according to the optimization algorithm, a simulation predicting the energy environment of the vehicle and the behavior of said driver up to the point of arrival B as a function of said setpoints and at least of the approximate profile of the remaining route, the optimization algorithm recognizing the result of the simulation for the calculation of the setpoints of the trajectories.