Consideration of Evaluation for Fuel Consumption under using Air Conditioner

Abstract

Energy consumption in air conditioning (A/C) has a significant effect on overall vehicle fuel consumption. However, there are some technical problems to evaluate its quantitative effect. We conducted chassis dynamometer and on-road vehicle tests to measure fuel consumption. The vehicle tests included normal and high ambient temperature conditions with and without using air conditioning to identify its effects. The results show that it is necessary to evaluate increased fuel consumption due to high ambient temperatures to be taken into account the reduction in road load caused by the lowered tire rolling resistance and the increment in energy needed by A/C.