Hybrid Thermostat Strategy for Enhancing Fuel Economy of Series Hybrid Intracity Bus

Abstract

The recently developed power distribution strategies in hybrid electric vehicles (HEVs) are often hard to apply, or the mathematical backgrounds are burdened by very complicated calculations. In this paper, a new control strategy, referred to as a hybrid thermostat strategy, is proposed for a series-type HEV (SHEV). The proposed strategy has its foundation in the thermostat strategy and incorporates merits from the power follower strategy such that it overcomes those strategy weaknesses and accomplishes increased efficiency with a practical concept. The development of the proposed strategy is based on AMESim and Simulink cosimulation with Simplex method optimization.