Patent ID: 8135517

Claim:
A control method of the torque of a road vehicle comprising a powertrain system provided with an engine presenting a drive shaft and a driveline which transmits the torque generated by the engine to the road surface through the drive wheels; the method comprises the steps of: determining a target torque (T e-targ ); and controlling the generation of torque by the engine on the basis of the target torque (T e-targ ); the method is characterized in that it comprises the further steps of: modeling the powertrain system as a single physical component which presents a characteristic mechanical inertia and a characteristic torsional elasticity and which must undergo a corresponding torsion to transmit a certain drive torque; determining a current load torque (T r ) of the vehicle; determining a target torsion (Δθ targ ) of the powertrain system according to the target torque (T e-targ ) and the current load torque (T r ); determining a current torsion (Δθ) of the powertrain system and a current torsion speed (Δθ′) of the powertrain system; determining a requested torque (T e-EC ) on the basis of the energy balance according to the target torsion (Δθ targ ), the current torsion (Δθ), the current torsion speed (Δθ′), and the current load torque (T r ); and using the requested torque (T e-EC ) on the basis of the energy balance to control the torque generation of the engine.