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文中介绍客车动力性和燃油经济性参数敏感性分析的意义及国内外现状；推导出客车传动系效率、总重、滚动阻力系数和空气阻力系数对动力性和燃油经济性的参数敏感性公式；在此基础上，利用计算机对J－H6581A型客车的动力性和燃油经济性作了参数敏感性分析；提出改善该车动力性和燃油经济性的建议。
In this paper, the significance of the sensitivities of passenger car dynamics and fuel economy parameters as well as the status quo at home and abroad are introduced. The sensitivity formulas of the powertrain efficiency, gross weight, rolling resistance coefficient and air resistance coefficient to power and fuel economy are derived. On this basis, the parameter sensitivity analysis of the power and fuel economy of J-H6581A passenger car is made by computer. Proposals to improve the car’s power and fuel economy are put forward.