This paper addresses the coordinated control of the\ud internal combustion engine and the electric motor in a parallel\ud hybrid electric vehicle, when both of them are running. In\ud deciding how much torque each motor contributes, both long\ud term energy oriented and short term drivability goals must\ud be considered. The first contribution in this paper consists\ud of proposing an architecture in which three main functional\ud blocks are present, namely a steady-state performance generator,\ud providing an energy oriented torque contribution, a transient\ud performance generator providing a drivability oriented torque\ud contribution, and a dynamic input allocator blending the outputs\ud of the other two blocks in such a way as to satisfy both the short\ud and the long term goals. The second contribution consists in\ud showing how the input allocator must be designed. The other\ud two blocks can be designed following any of several recipes\ud already described in the literature. Experimental validation of\ud the proposed approach confirms the relevance of accounting for\ud the different motor dynamics in the allocator design

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A novel strategy for the dynamic managment of the load request for the Internal Combustion Engine (ICE) and the Electrical Motor (EM) in a parallel hybrid vehicle is presented. The goal is the performing of a load splitting between ICE and EM subject to the achievement of good drivability of the vehicle in terms of coherence of the torque supply with the driver request (transient performance) for every load splitting between the two motors (static performance). In particular a dynamic allocation scheme is proposed, which dynamically distribute the power demand among the two propulsion systems, using suitable characterizations of their dynamics. Its stability and convergence properties are formally proven and the effectiveness of the control scheme is illustrated via simulations