Abstract
Natural wind influence on fuel consumption, fc , for highway vehicles is studied for real wind modeling. The increase in fuel consumption, βf, is related to wind speed, U, through the aerodynamic influence coefficient on fc, KA, which is tentatively proposed for a class of small vehicles (passenger cars) and a class of large vehicles (trucks), respectively. A head wind of U = 3 m/s, nearly equal to yearly averaged wind speed, results in a 7 - 16 % increase in fc for a small vihecle (100km/h (27.8m/s)) and a 9 - 14% increase for a large vehicle (80km/h (22.2m/s)).
