Instantaneous optimization-based energy management systems (EMS) are getting popular since they can yield near-optimal performance in unknown driving situations with minimalistic tuning parameters. However, they often disregard the drivability score of the powertrain as a performance assessment criterion, and this leads to too frequent or even infeasible mode-transitions during the multi-mode operation of a hybrid electric powertrain. Aiming to bring down the mode-transition frequency below a feasible limit, this paper proffers an instantaneous optimization-based EMS, which also accounts for the energy lost during mode-transitions into the cost function along with the electrical and chemical energy losses. The energy lost during a single mode-transition event refers to the summation of change in rotational energy for all the prime-movers, i.e., internal combustion engine and electric machines. However, this approach will add another weighting factor for weighting the mode-transition loss term in the same equivalent scale used for weighting other loss terms too. A dynamic coordinated control prescribed in literature is also employed along with the EMS to enhance the drivability score of multi-mode hybrid electric powertrains. Simulation results corroborate the efficacy of the proffered EMS framework in ameliorating the drivability issues without sacrificing much in the fuel consumption and charge sustainability performances.
Energy Management System for Input-Split Hybrid Electric Vehicle (Si-EVT) with Dynamic Coordinated Control and Mode-Transition Loss
Sae Technical Papers
WCX SAE World Congress Experience ; 2022
2022-03-29
Conference paper
English
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