Although Hybrid Electric Vehicles (HEVs) represent a powerful technology to save fuel and reduce pollutant emissions, through the synergic use of a conventional internal combustion engine and one or more electric machines, their performance strongly depends on the control strategy that defines the operating mode and shares the power demand among the different power actuators at each time instant. Consequently the aim of this work is the definition of a comprehensive methodology to develop, through numerical simulation, a sub-optimal hybrid powertrain control strategy: two specific hybrid...