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In this work two concepts of automotive power trains are analyzed and compared using multi-physical simulation. The focus of the presented investigation is the energy consumption improvement due to the electrification of the air conditioning (AC) system in a sport utility vehicle (SUV). A full vehicle model representing a real SUV with conventional power train (internal combustion engine (ICE), clutch, gearbox, multi speed transmission gear, differential and driving axles) is developed. This conventional SUV model gets compared with a mild hybrid concept including a starter-generator, a battery and an inverter fed drive with control unit. Mechanical, electrical and detailed thermal effects are considered in the simulations. By comparing the energy consumptions, the potential of efficiency improvement due to the implementation of an electrified AC system is shown at the example of a state-of-the-art SUV.

Energy efficiency of electric vehicles (EVs) and the representativeness of different driving cycles are important aspects to address EVs performance in real-world driving conditions. This paper presents the results of an explorative tests campaign carried out at the Joint Research Centre of the European Commission to investigate the impact of different driving cycles on the energy consumption of an electric vehicle available on the market. The vehicle is a battery electric city-car which has been tested over the New European Driving Cycle (NEDC), the current version of the World-wide harmonized Light vehicles Test Cycle (WLTC) and the World-wide Motorcycle emission Test Cycle (WMTC). The tests are performed at different ambient temperatures (namely +23 °C and −7 °C) with and without the use of the Heating Ventilation and Air-Conditioning (HVAC) system (in cooling and heating mode, respectively).