Vehicle Ancillary Load Reduction Project Close-Out Report: An Overview of the Task and a Compilation of the Research Results

Abstract

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Model Predictive Climate Control of Connected and Automated Vehicles for Improved Energy Efficiency

“…Thermal loads, such as those used for heating, ventilation, & air conditioning (HVAC) of the passenger compartment, and for the electric motor and battery package cooling, represent the most significant auxiliary loads for light-duty vehicles [1]. It has been estimated that, in the United States, about 7 billion gallons of fuel is consumed per year just to power the air conditioning (A/C) system for light-duty vehicles [1].…”

Implications of sustainability for the United States light-duty transportation sector

“…These improvements have the potential to reduce HVAC losses by about 30%. 36 Electrifi cation of power steering and other auxiliary components present signifi cant additional opportunities for reducing energy loads. Historically, auxiliary components are driven by mechanical accessory drives that are much less effi cient than electrical accessory drives.…”

Sequential optimization of speed, thermal load, and power split in connected HEVs

“…The vehicle queuing process is explicitly modeled by the shockwave profile model with consideration of vehicle deceleration and acceleration to provide a green window for eco-vehicle speed trajectory planning. For light-duty HEVs with relatively small batteries, air conditioning of the passenger compartment is the primary thermal load in summer, which represents the most significant auxiliary load on the electric battery [7]. It has been found that the energy efficiency of the A/C system is dependent on vehicle speed [8].…”