摘要
本文针对现有行驶循环不能真实评价实际道路整车性能的问题,基于实际道路行驶数据,采用主成分分析与聚类分析和基于速度-加速度短片段寻优等多元统计方法构建重型柴油车实际道路行驶工况,分析了行驶工况多项特征参数。结果表明,构建的重型柴油车实际道路行驶工况能基本体现重型柴油车在实际道路上的行驶特征。构建的行驶工况与WHTC循环有较大差异,其平均运行车速为30.5km/h,行驶里程13.379km,怠速时间占比12.4%,加减速时间占比86.6%。在中低速和中高速区转速和转矩波动较大,反映了拥挤的交通状况和复杂的驾驶环境。在高速区转速和转矩较为平稳,说明车辆处于平顺的驾驶环境。怠速和极端驾驶产生的燃油消耗占比不大,高速区燃油消耗远高于其他速度区。
Aiming at the problem that the existing driving cycle can＇t truly evaluate the performance of vehi-cle running on real road, based on real road driving data and using multivariate statistical methods including princi-pal component analysis, cluster analysis and the optimization based on velocity-acceleration micro- trips, a real road driving cycle for heavy-duty diesel vehicle is constructed and several characteristic parameters of driving conditions are analyzed. The results show that the real road driving cycle constructed for heavy-duty diesel vehicle can basically embody the driving characteristics of heavy-duty diesel vehicle on real road. T he driving cycle constructed is quite different from WHTC cycle,its average driving speed is 30. 5k m /h,its mileage is 13. 379k m ,with its idling time accounting for 12. 4%,and its acceleration and deceleration times accounting for 86. 6%. In the low/middle speed and middlhigh speed regions, the rotation speed and torque of engine have greater fluctuation, reflecting a crowd-ed traffic condition and a complicated driving environment, while in high speed region, they are more stable, indi-cating a smooth driving environment. The fuel consumptions in idling and extreme driving conditions only account for a small proportion while that in high speed condition is much higher than other ones.
出处
《汽车工程》
EI
CSCD
北大核心
2017年第12期1438-1443,共6页
Automotive Engineering
基金
工信部项目(工装函[2015]614号)
吉林大学项目(3D516P952415)资助
关键词
重型柴油车
实际道路
行驶工况
heavy-duty diesel vehicle
real road
driving cycle
