汽车燃油经济性计算方法及仿真分析

摘要

Fuel economy is one of the most important performance indexes of the automobile,and fuel economy is better.Not only can it reduce the cost of vehicle,but it also can obtain better performance of emission reduction of environmental pollution.In this paper,on the basis of the U.S.Federal Test Procedure (EPA)for vehicle dynamic analysis,it analyzed automobile different driving states fuel consumption in urban driving cycle (UDDS)and highway driving cycle (HWFET),and proposed a calculation method for automobile fuel economy.Using of Matlab/Simulink,it built model of vehicle based on theoretical analysis and relative reference.The fuel economy on the driving cycle was simu-lated.Contrasting with fuel economy of the theoretical calculation,the results showed in the present paper illustrate that the automobile fuel economy calculation methods are reasonable and accurate.%燃油经济性是汽车最重要的性能指标之一。燃油经济性好不仅可以降低汽车的使用费用，还可以获得较好的排放性能以减少对环境的污染。在美国联邦环境保护局（EPA）规定的测试程序的基础上对汽车进行动力学分析，分析汽车在城市循环工况（UDDS）和高速路循环工况（HWFET）两种不同行驶状态下的燃油消耗情况，提出了一种汽车燃油经济性的计算方法。利用Matlab/Simulink对整车进行建模，对该型车辆在循环工况下的燃油消耗量进行仿真，并与理论计算值进行对比分析。结果表明：所提出的汽车燃油经济性的计算方法是合理、准确的。