HyHIL: online optimal control of a parallel hybrid with after-treatment constraint integration
The present paper deals with the activities and the
results achieved under a cooperative research project between
IFP, D2T, LMS, G2Elab and Renault focused on Hardware-inthe-
Loop (HIL) applications to hybrid power-trains conception
and assessment. The main goal of this study is the evaluation of
hybrid propulsion concepts and the benefits of different degrees
of hybridization in a flexible architecture, by using a chain of
simulation platforms: from the co-simulation to the highdynamic
engine-in-the-loop test bed, through a virtual version of
the last one. This paper focuses on the implementation issues of
an energy management strategy (EMS) for a parallel hybrid
architecture. The EMS is developed from the optimal control
theory, using Pontryagin’s Minimum Principle (PMP). The
resulting Equivalent Consumption Minimization Strategy
(ECMS) is implemented in real time and tested in an
experimental environment (HyHiL test bench). In particular, a
possible integration of the three way catalytic converter
constraint in the optimization is presented.