Power Management of a Hybrid Electric Vehicle During Warm-up Period Considering Energy Consumption of Cabin Heat Components

This paper proposes a predictive control for hybrid electric vehicles (HEVs) under conditions that exhaust heat power from an internal combustion engine (ICE) is needed. Owing to motor-generators (MGs) and a battery, the ICE in an HEV can be selectively operated under high efficiency conditions. This aims to reduce the amount of fuel converted into exhaust heat power as low as possible. However, this may cause a lack of heat power when an ICE is warming up or when the cabin heating system is operating in cold weather. Under such conditions, the ICE and MGs should be controlled to balance heat power, fuel consumption and electricity usage. In this paper, a predictive control is used with models for ICE, MG, battery, cabin heat components and ICE coolant. This control determines ICE power by minimising a cost function that includes predicted warm-up time and fuel consumption. Finally, the effectiveness of the control is demonstrated by simulation.