Power distribution control algorithm for fuel economy optimization of 48V mild hybrid vehicle

Abstract

In this paper, we developed a supervisory control algorithm for fuel economy optimization of 48V MHEV (Mild Hybrid Electric Vehicle). It consists of the driving mode decision algorithm (Driving modes of 48V MHEV: Idle stop & go, EV(EV-launch, sailing), HEV(torque assist, Charge), ICE only, Recuperation) and power distribution algorithm for each driving mode. In particular, power distribution control is a key factor in determining the fuel economy of 48V MHEV. In this paper, a simulation-based analysis is performed to analyze the fuel consumption relevance of the power distribution algorithm. The vehicle model was developed in the Autonomie environment. The optimal power distribution control method was derived by analyzing the fuel consumption simulation results (traveling cycle: FTP 75) for the power distribution control with different tendencies. ? Copyright 2017 by CAL-TEK S.r.l. All rights reserved.