Optimal Energy Control Strategy Design for a Hybrid Electric Vehicle

Abstract EN

A heavy-duty parallel hybrid electric truck is modeled, and its optimal energy control is studied in this paper.

The fundamental architecture of the parallel hybrid electric truck is modeled feed-forwardly, together with necessary dynamic features of subsystem or components.

Dynamic programming (DP) technique is adopted to find the optimal control strategy including the gear-shifting sequence and the power split between the engine and the motor subject to a battery SOC-sustaining constraint.

Improved control rules are extracted from the DP-based control solution, forming near-optimal control strategies.

Simulation results demonstrate that a significant improvement on the fuel economy can be achieved in the heavy-duty vehicle cycle from the natural driving statistics.