Method for managing torque distribution in a hybrid vehicle

A computer for managing the drive train of a hybrid vehicle comprising at least one internal combustion engineer, at least one electric machine and at least one battery, said drive train being capable of operating in a plurality of modes, each mode being either a battery charging mode or a battery discharging mode, said computer being configured to:

• a. determine a set of probabilities of activation of said mode (pch{i}, pdch{i}) as a function of:
• i. a predetermined set of probabilities of occurrence (pocc{i}) of a set of triplets ({i}) of values comprising the torque requested by the driver (TQreq), the speed (Nth) of the internal combustion engine (20) and the speed (Vs) of the vehicle,
• ii. a predetermined table of cost values (TC{i}), said cost (TC) representing the quantity of fuel consumed for a unit of electrical energy stored by the battery in the case of the charging of the battery or the quantity of fuel saved for a unit of electrical energy consumed by the battery in the case of the discharging of the battery,
• iii. and a pair of thresholds comprising a charging cost threshold and a discharging cost threshold,
• b. determine the set of values of the speed (Nelec{i}) of the electric machine (40), each speed value (Nelec{i}) corresponding to a triplet ({i}),
• c. for each mode, determine a set of electrical powers (PelecCH{i}, pelecDCH{i}) of the electric machine (40) as a function of the set of activation probabilities (pch{i}, pdch{i}) determined, a predetermined table of torque values (TQ{i}) to be applied to the electric machine (40), and the speed (Nelec{i}) of the electric machine (40) determined,
• d. calculate an energy consumption reduction indicator (B) on the basis of the set of electrical powers (PelecCH{i}, pelecDCH{i}) determined and the table of cost values (TC{i}),
• e. determine a pair of thresholds (Sch, Sdch) comprising a charging cost threshold (Sch) and a discharging cost threshold (Sdch) maximizing the energy consumption reduction indicator calculated,
• f. determine the torque requested by the driver (TQreq), the value of the speed (Nth) of the internal combustion engine and the speed (Vs) of the vehicle,
• g. determine a torque to be applied to the electric machine on the basis of the torque requested by the driver (TQreq) determined, the value of the speed (Nth) of the internal combustion engine determined, the speed (Vs) of the vehicle determined, the threshold pair (Sch, Sach) determined, the predetermined table of torque values (TQ{i}) and the predetermined table of cost values (TC{i}), and
• h. send a command to the electric machine on the basis of the torque to be applied to the electric machine determined.