基于能量流分析的汽车发动机与传动系匹配  

Matching between the automotive engine and transmission system based on energy flow analysis

作　　者：杨翔宇[1] 王刚[1] 韩宗奇[2,3] 周荣宽[1] 

机构地区：[1]重庆理工大学车辆工程学院 [2]清华大学汽车安全与节能国家重点实验室 [3]燕山大学车辆与能源学院

出　　处：《汽车安全与节能学报》2015年第1期90-96,共7页Journal of Automotive Safety and Energy

基　　金：重庆市教科委科技项目(KJ080619)

摘　　要：以整车设计的动力性和经济性为目标,提出了一种新的汽车发动机与传动系的匹配方法。根据发动机性能与汽车动力性的要求,选择发动机额定功率及其相关参数。从能量流角度,分析了汽车行驶时发动机总能量和汽车各系统的能量需求。在美国环境保护署(EPA)测试程序工况下进行动力学分析,采用经验公式计算循环耗油量,并以此作为经济性的设计要求,仿真描绘了发动机的性能曲线。结果表明:最高车速为198.5 km/h,直接档的最大动力因数为0.463,一档的最大爬坡度0.46,0到100 km的加速时间为9.8 s,循环油耗量为9.74 L/(100 km)。因此,本匹配方法是合理的。A new scheme was proposed for matching between engine and transmission system with the power performance and fuel economy of an automobile being as matching objective, and with the engine rated power and other relevant parameters being as given parameters, according to the demand of the automobile power performance and engine performance. Total engine energy requirements and various system energy requirements were analyzed by using energy lfow. Automobile dynamics analysis was done under working conditions based on the U.S. Environmental Protection Agency （EPA） Test Procedure to calculate circle fuel consumption using empirical formulas with the fuel consumption being as design economy requirements, and with the performance curves describing engine performances. The results show that the maximum speed is 198.5 km/h, the maximum power factor is 0.463, the maximum gradient is 0.46, the acceleration time is 9.8 s when accelerating from 0 to 60 km, and the fuel consumption is 9.74 L/（100 km）. Therefore, the matching method is reasonable.

关 键 词：汽车发动机 汽车传动系 匹配 能量流 动力性 经济性 

分 类 号：U462.31[机械工程—车辆工程]