汽车经济性是指以最小的燃油消耗量完成单位运输工作的能力。经济性有三个评价指标：单位行驶里程的燃料消耗量、单位运输工作量的燃料消耗量、消耗单位燃油所行驶的里程，中国主要以针对第一个指标的测试为主。
并揭示了降低滚动阻力系数也是提高汽车燃油经济性的重要措施之一。
Furthermore, it is expounded that reducing the coefficient of rolling resistance is one of the important methods to improve fuel economic character of the automobile.
在目前，一般采用等速燃油经济性和多工况燃油经济性评价汽车燃油经济性。
At present, we generally use isokinetic fuel economy and the status of multi-fuel economy to evaluate automobile fuel economy.
随着汽车数量的增加以及石油资源的紧缺，汽车燃油经济性成为世界各国研究的重点之一。
Along with automobile quantity increase as well as oil resource scarcity, the automobile fuel oil efficiency becomes one of various countries research key.
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